First, the industrial furnace fire-resistant high insulating brick with fire-resistant cotton is the corresponding fire-resistant material 20mm thick needle-punched blankets made by finishing, size neat, in full compliance with national standards, strict control of the plastic tube in the middle, acupuncture blanket thickness Uniform, all for the fine acupuncture blanket, unlike some enterprises in the middle of the module doping dross blankets, blankets, acupuncture blanket alumina brick slag ball content is low, low degree of hand, used to do all the pre-acupuncture blanket blanket, And there are loading tools to ensure the arrival of the module when the flatness of the company can also provide module installation CD-ROM and supporting the installation of the module tools can cash delivery, I feel dissatisfied may not. Jinan Shengyang fire-resistant ladle slide gate cotton has a good effect of fire-resistant insulation and insulation to improve the overall fire-resistant insulation kiln, and promote the progress of the furnace masonry technology. Classification temperature 1050-1400 ℃.
Note: a variety of fire-resistant cotton, is the corresponding material acupuncture blanket, according to the fiber component structure, size, made in the special machinery. In the processing process, are to maintain a certain percentage of compression to ensure that fire-resistant cotton lining lining is completed, the fire-resistant cotton in different directions of expansion, so that between the fire-resistant cotton into a seamless seamless with each other, Various forms of anchors clay insulating bricks are directly attached to the steel plate anchor bolts of the industrial furnace shell.
Second, the product features: excellent chemical stability; excellent thermal stability; excellent flexibility, the module in the pre-pressure state, in the lining after the completion of the expansion of the module so that the lining seamless and can compensate for fiber lining shrink, Improve the thermal insulation properties of fiber lining, the overall performance is good; excellent thermal stability and thermal shock resistance; ceramic fiber module installed quickly, and anchors set in the cold wall lining, can reduce the anchor material requirements. According to the customer for different furnace insulation design and construction training.
Third, the industrial furnace fire-resistant cotton insulation advantages:
1, cost-effective, construction costs flat or even lower than the brick structure.
2, long life, material composition is extremely stable, stable service life can reach 5 - 10 years, effectively saving maintenance costs and enhance the use of the cycle.
3, energy-saving effect is obvious, a conventional tunnel kiln, a year can save 100-200 tons of coal, reduce costs, increase profits and competitiveness.
4, low density: light insulation than brick lining more than 75% lighter than light weight castable lining 90% to 95%. Such as the use of fiber lining can greatly reduce the furnace load of steel, to extend the furnace life.
5, anti-quench cold hot, will not be damaged due to open shutdown.
6, the construction is simple: the construction process without leaving the expansion joints, construction workers after basic training can be posts, construction technology on the insulation effect of the lining of small.
7, no oven: lining construction can be put into use, no oven program.
Henan Xinmi Changxing Refractory Material Co., Ltd. Located in Henan Province,China.ChangXing's product portfolio covers shaped products such as refractory materials,refractory brick, refractory castable,firebrick refractory,refractory nozzle, ceramic fiber, slide gate, etc; unshaped products including repair, construction and casting mixes and mortars.exported to more than 20 countries, such as Thailand, Indonesia, Pakistan, Saudi Arabia, South Africa, Turkey, Iran, Iraq and so on.
2016年11月4日星期五
2016年8月8日星期一
Fused Cast AZS Block and Glass Defects
Fused cast AZS block exudation is thought as the leading cause of knot and cord defects. Fused cast AZS exudation is only a short-term source of glass defects. Fused cast AZS corrosion is a more potent and long-term source of defects. Glass melt contact refractory corrosion castable refractory material can lessen with time due to boundary layer formation and the effect of external cooling at the metal line.
The interaction of glass melts and refractories in glass furnaces has a large impact on the resulting glass quality. The mostly applied type of refractory in the glass industry, in direct contact with the glass melt, is fused cast AZS. Due to the interaction of the glass melt clay insulating bricks with fused cast AZS, glass defects like stones, knots and bubbles can be generated.
Fused cast AZS block has no open porosity but there are some closed voids and pores which arise from the manufacturing process. These pores are filled with gases. The gases in these pores refractory fiber board have an air like composition, with nitrogen and oxygen as main components and some carbon dioxide. When fused cast AZS is in contact with glass, it reacts with the glass melt and slowly dissolves in this melt. The closed pores will be opened and then release their gas content, forming bubbles.
Impurities, which can oxidize, are for example elemental carbon originating from graphite electrodes of the fused casting operation, sulfur or zirconium carbide originating from raw materials of the AZS. The dissociation/oxidation of nitrides/oxynitrides, produced by reactions with the graphite electrodes during melting of the AZS, could give nitrogen insulating castable gas.
The generation of a knot is due to one or more forces, which drive the fused cast AZS glass phase towards the refractory surface and into the bulk of the glass melt. Those forces can be caused by gravity, thermal expansion of zirconia and gas formation.
Glass defects are typically unavoidable, but their occurrence must be minimized during the production of high-quality glasses. Some alternatives, such as fused cast AZS with modified chemistry and glassy phase and alpha-beta fused cast alumina block are used to replace fused cast AZS to reduce the glass defects and improve the glass quality.
When fused cast AZS block is brought into contact with a glass melt, an electrical potential is generated between the refractory and the glass melt because generally no thermodynamic equilibrium exists between these materials. The electromotive force (emf) generated between glass melt and refractory interior can cause the formation of oxygen bubbles.
Henan Xinmi Changxing Refractory Material Co., Ltd. Located in Henan Province,China.ChangXing's product portfolio covers shaped products such as refractory material,refractory brick, refractory castable,refractory nozzle, ceramic fiber, slide gate, etc; unshaped products including repair, construction and casting mixes and mortars.exported to more than 20 countries, such as Thailand, Indonesia, Pakistan, Saudi Arabia, South Africa, Turkey, Iran, Iraq and so on.
The interaction of glass melts and refractories in glass furnaces has a large impact on the resulting glass quality. The mostly applied type of refractory in the glass industry, in direct contact with the glass melt, is fused cast AZS. Due to the interaction of the glass melt clay insulating bricks with fused cast AZS, glass defects like stones, knots and bubbles can be generated.
Fused cast AZS block has no open porosity but there are some closed voids and pores which arise from the manufacturing process. These pores are filled with gases. The gases in these pores refractory fiber board have an air like composition, with nitrogen and oxygen as main components and some carbon dioxide. When fused cast AZS is in contact with glass, it reacts with the glass melt and slowly dissolves in this melt. The closed pores will be opened and then release their gas content, forming bubbles.
Impurities, which can oxidize, are for example elemental carbon originating from graphite electrodes of the fused casting operation, sulfur or zirconium carbide originating from raw materials of the AZS. The dissociation/oxidation of nitrides/oxynitrides, produced by reactions with the graphite electrodes during melting of the AZS, could give nitrogen insulating castable gas.
The generation of a knot is due to one or more forces, which drive the fused cast AZS glass phase towards the refractory surface and into the bulk of the glass melt. Those forces can be caused by gravity, thermal expansion of zirconia and gas formation.
Glass defects are typically unavoidable, but their occurrence must be minimized during the production of high-quality glasses. Some alternatives, such as fused cast AZS with modified chemistry and glassy phase and alpha-beta fused cast alumina block are used to replace fused cast AZS to reduce the glass defects and improve the glass quality.
When fused cast AZS block is brought into contact with a glass melt, an electrical potential is generated between the refractory and the glass melt because generally no thermodynamic equilibrium exists between these materials. The electromotive force (emf) generated between glass melt and refractory interior can cause the formation of oxygen bubbles.
Henan Xinmi Changxing Refractory Material Co., Ltd. Located in Henan Province,China.ChangXing's product portfolio covers shaped products such as refractory material,refractory brick, refractory castable,refractory nozzle, ceramic fiber, slide gate, etc; unshaped products including repair, construction and casting mixes and mortars.exported to more than 20 countries, such as Thailand, Indonesia, Pakistan, Saudi Arabia, South Africa, Turkey, Iran, Iraq and so on.
What Is Fused Cast Alumina Block
Clay, High Alumina insulating bricks First melt the raw materials in an electric arc furnace. When the material has become molten and its chemical and physical characteristics have been adjusted to the desired condition, pour the ladle slide gate molten material into a mold. Then the cast product is processed with machines into the final product.
Fused cast alumina block is made of pure alumina powder(>95%) and a small amount of additions (soda sand and quartz sand). There are commercially 3 types of fused cast alumina blocks: Beta fused ceramic fiber felt cast alumina block, Alpha-beta Fused cast Alumina Block and Alpha fused cast alumina block.
Beta fused cast alumina block comprises of a majority of beta alumina crystals and a slight portion of alpha alumina crystals in compact structure. Moreover, the intersected texture of large beta-alumina ensures great dimensional stability and great resistance against spalling. Its property of base saturation enables a higher resistance to alkali vapor, thus it has excellent thermal shock resistance and does not form molten droplets. It is the best material for molter crown, port crown,feeder channel,ect. Its neutrality against soda vapors makes it the best choice for the downstream part of superstructures in demanding applications.
Alpha fused cast alumina block is ladle castable an ideal product for the lower temperature zones of the glass melting furnaces due to its high density, superior corrosion resistance and low blister potential. It is also an ideal material for Metallurgical Titanium Furnace because the superior thermal stability.
Alpha-beta Fused cast Alumina Block is formed by the compact structure of alpha alumina and beta alumina crystals in a most ideal proportion which is approximately 50% and 50% respectively,where intertwined crystals of both materials result in a very dense structure. Below 1350 ℃, it has excellent corrosion resistance against molten glass and great performance against contamination to molten glass, thus it is very suitable for paving blocks and fore-hearth channel blocks. When in contact with molten glass, it barely produces any blistering or stones. So, it may be widely used in working tank, feeder channels, superstructures and lipstone, etc. In soda-lime container furnaces, it is installed in the Alcove and channel areas, as alternative to fused cast AZS for Alcoves and as alternative to AZS fused-cast, zirmul, sinter-alumina and other sinter refractories for channels.
Henan Xinmi Changxing Refractory Material Co., Ltd. high insulating brick Located in Henan Province,China.ChangXing's product portfolio covers shaped products such as refractory materials,refractory brick, refractory castable,refractory nozzle, ceramic fiber, slide gate, etc; unshaped products including repair, construction and casting mixes and mortars.exported to more than 20 countries, such as Thailand, Indonesia, Pakistan, Saudi Arabia, South Africa, Turkey, Iran, Iraq and so on.
Fused cast alumina block is made of pure alumina powder(>95%) and a small amount of additions (soda sand and quartz sand). There are commercially 3 types of fused cast alumina blocks: Beta fused ceramic fiber felt cast alumina block, Alpha-beta Fused cast Alumina Block and Alpha fused cast alumina block.
Beta fused cast alumina block comprises of a majority of beta alumina crystals and a slight portion of alpha alumina crystals in compact structure. Moreover, the intersected texture of large beta-alumina ensures great dimensional stability and great resistance against spalling. Its property of base saturation enables a higher resistance to alkali vapor, thus it has excellent thermal shock resistance and does not form molten droplets. It is the best material for molter crown, port crown,feeder channel,ect. Its neutrality against soda vapors makes it the best choice for the downstream part of superstructures in demanding applications.
Alpha fused cast alumina block is ladle castable an ideal product for the lower temperature zones of the glass melting furnaces due to its high density, superior corrosion resistance and low blister potential. It is also an ideal material for Metallurgical Titanium Furnace because the superior thermal stability.
Alpha-beta Fused cast Alumina Block is formed by the compact structure of alpha alumina and beta alumina crystals in a most ideal proportion which is approximately 50% and 50% respectively,where intertwined crystals of both materials result in a very dense structure. Below 1350 ℃, it has excellent corrosion resistance against molten glass and great performance against contamination to molten glass, thus it is very suitable for paving blocks and fore-hearth channel blocks. When in contact with molten glass, it barely produces any blistering or stones. So, it may be widely used in working tank, feeder channels, superstructures and lipstone, etc. In soda-lime container furnaces, it is installed in the Alcove and channel areas, as alternative to fused cast AZS for Alcoves and as alternative to AZS fused-cast, zirmul, sinter-alumina and other sinter refractories for channels.
Henan Xinmi Changxing Refractory Material Co., Ltd. high insulating brick Located in Henan Province,China.ChangXing's product portfolio covers shaped products such as refractory materials,refractory brick, refractory castable,refractory nozzle, ceramic fiber, slide gate, etc; unshaped products including repair, construction and casting mixes and mortars.exported to more than 20 countries, such as Thailand, Indonesia, Pakistan, Saudi Arabia, South Africa, Turkey, Iran, Iraq and so on.
2016年8月4日星期四
The application and working principle of Sliding Nozzle
Nowadays sliding nozzle systerm is becoming more and more important in the process of melting and be an necessary part for melting. It is the control device of molten steel in casting process, which can precisely adjust the water flow from ladle to tundish, to make the flowing and flowing out of the molten steel can reach a balance, so that the continuous casting operation is easier to control.Because of its good controllability, the sliding gate system can improve the efficiency of steel making and has been developed rapidly. At present, the sliding gate system is widely used in ladle and tundish.
Generally, the sliding nozzle is composed of a driving device, a mechanical part and a refractory material part (i.e. upper and lower slide plate, nozzle). The working principle of the sliding gate is to slide the upper and lower sliding plate brick through the sliding mechanism, thereby driving the opening and closing of the flow steel hole to adjust the flow rate of the molten steel.
As the refractory material and mechanical component of the sliding gate system,in order to obtain a longer service life and stable operating conditions,sliding gate is requested with excellent properties.
Article source：
2016年7月5日星期二
New Types of Refractory For The Glass Furnace
refractories can be used at 1700℃ and has better mechanical strength and thermal stability.
In the past, high chromium brick was mainly used for the production of reinforced glass and sometimes in the insulation castable refractory material glass furnace. Now it is increasingly used in some soda-lime glass furnaces. It has much better corrosion resistance to glass and can prolong the service life of throat. Besides the throat, it is also used in the end wall, the angle brick of the feeder port. However, clay insulating bricks the chromium may color the glass liquid, thus it can not be used in the white glass furnace. It was primarily used in the colored glass furnace, but now it has been successfully used in the transparent container glass furnace.
Low glass phase fused cast AZS block has been successfully used in the superstructure. The development of the oxygen-fuel combustion technology makes it find wider application in the superstructure. Since it contains a low amount of glass phase, it has better creep refractory fiber board resistance and the amount of exuded glass phase has been reduced to a very low level.
Fused cast high zirconia block is a new type of refractory, mainly used in the glass contact areas in high quality glass furnace. It has a low potential of causing stones, knots and bubbles and can effectively reduce glass defects. It is also in some low alkali glass or hard borosilicate glass furnaces.
The need of the glass manufacturers to maintain and improve the quality of glass and expand the service life of the glass furnace and the impact and influence of the oxygen-fuel combustion technology, promote the improvement of refractories and development of the new insulating castable refractories.
Fused cast alumina block has been widely used in the crown of the oxygen-fuel furnace, especially when manufacturing high quality glass. Before the application of the oxygen-fuel combustion technology, only β alumina block is used in the superstructure of the melting furnace. Now both β fused cast alumina block and α-β fused cast alumina block can be used in the crown of the oxygen-fuel furnace for producing TV glass, float glass and borosilicate glass.
Henan Xinmi Changxing Refractory Material Co., Ltd. Located in Henan Province,China.ChangXing's product portfolio covers shaped products such as refractory materials,refractory brick, refractory castable,refractory nozzle, ceramic fiber, slide gate, etc; unshaped products including repair, construction and casting mixes and mortars.exported to more than 20 countries, such as Thailand, Indonesia, Pakistan, Saudi Arabia, South Africa, Turkey, Iran, Iraq and so on.
product list:
http://www.yilongrefractory.com/AllProductServlet?id=2&number=20
In the past, high chromium brick was mainly used for the production of reinforced glass and sometimes in the insulation castable refractory material glass furnace. Now it is increasingly used in some soda-lime glass furnaces. It has much better corrosion resistance to glass and can prolong the service life of throat. Besides the throat, it is also used in the end wall, the angle brick of the feeder port. However, clay insulating bricks the chromium may color the glass liquid, thus it can not be used in the white glass furnace. It was primarily used in the colored glass furnace, but now it has been successfully used in the transparent container glass furnace.
Low glass phase fused cast AZS block has been successfully used in the superstructure. The development of the oxygen-fuel combustion technology makes it find wider application in the superstructure. Since it contains a low amount of glass phase, it has better creep refractory fiber board resistance and the amount of exuded glass phase has been reduced to a very low level.
Fused cast high zirconia block is a new type of refractory, mainly used in the glass contact areas in high quality glass furnace. It has a low potential of causing stones, knots and bubbles and can effectively reduce glass defects. It is also in some low alkali glass or hard borosilicate glass furnaces.
The need of the glass manufacturers to maintain and improve the quality of glass and expand the service life of the glass furnace and the impact and influence of the oxygen-fuel combustion technology, promote the improvement of refractories and development of the new insulating castable refractories.
Fused cast alumina block has been widely used in the crown of the oxygen-fuel furnace, especially when manufacturing high quality glass. Before the application of the oxygen-fuel combustion technology, only β alumina block is used in the superstructure of the melting furnace. Now both β fused cast alumina block and α-β fused cast alumina block can be used in the crown of the oxygen-fuel furnace for producing TV glass, float glass and borosilicate glass.
Henan Xinmi Changxing Refractory Material Co., Ltd. Located in Henan Province,China.ChangXing's product portfolio covers shaped products such as refractory materials,refractory brick, refractory castable,refractory nozzle, ceramic fiber, slide gate, etc; unshaped products including repair, construction and casting mixes and mortars.exported to more than 20 countries, such as Thailand, Indonesia, Pakistan, Saudi Arabia, South Africa, Turkey, Iran, Iraq and so on.
product list:
http://www.yilongrefractory.com/AllProductServlet?id=2&number=20
Suggestions On The Proper Use Of Fused Cast AZS
silica brick (such as the front wall of the feeder pool),each material should have its own structure, because they have different volume changes at high temperature. For the superstructure that is less than 8m, there is no need to leave expansion joints. For the superstructure ceramic fiber felt that is longer than 8m, it is recommended to divide it into several parts by expansion joints(4-6mm).
There are masonry joints between the sidewall block and the bottom block. When the refractory materials are heated, 4-5mm volume expansion per meter will be expanded into the masonry joints.
Fused cast AZS block has a higher thermal conductivity. When used in the sidewall, it parts near the liquid ladle castable level require bigger cooling air flow.
Based on the campaign life of the glass furnace, the indicators of the furnace operation and the physical and chemical properties and performance of fused cast AZS block, some reasonable suggestions high insulating brick are made on the proper use of the fused cast AZS.
Fused cast AZS is characterized with stable and dense structure and good corrosion resistance to glass. During 900-1200℃, it will have a abnormal volume expansion due to its crystal phase transition.
Henan Xinmi Changxing Refractory Material Co., Ltd. Located in Henan Province,China.ChangXing's product portfolio covers shaped products such as refractory materials,refractories brick, refractory castable,refractory nozzle, ceramic fiber, slide gate, etc; unshaped products including repair, construction and casting mixes and mortars.exported to more than 20 countries, such as Thailand, Indonesia, Pakistan, Saudi Arabia, South Africa, Turkey, Iran, Iraq and so on.
product list:
http://www.yilongrefractory.com/AllProductServlet?id=4&number=20
There are masonry joints between the sidewall block and the bottom block. When the refractory materials are heated, 4-5mm volume expansion per meter will be expanded into the masonry joints.
Fused cast AZS block has a higher thermal conductivity. When used in the sidewall, it parts near the liquid ladle castable level require bigger cooling air flow.
Based on the campaign life of the glass furnace, the indicators of the furnace operation and the physical and chemical properties and performance of fused cast AZS block, some reasonable suggestions high insulating brick are made on the proper use of the fused cast AZS.
Fused cast AZS is characterized with stable and dense structure and good corrosion resistance to glass. During 900-1200℃, it will have a abnormal volume expansion due to its crystal phase transition.
Henan Xinmi Changxing Refractory Material Co., Ltd. Located in Henan Province,China.ChangXing's product portfolio covers shaped products such as refractory materials,refractories brick, refractory castable,refractory nozzle, ceramic fiber, slide gate, etc; unshaped products including repair, construction and casting mixes and mortars.exported to more than 20 countries, such as Thailand, Indonesia, Pakistan, Saudi Arabia, South Africa, Turkey, Iran, Iraq and so on.
product list:
http://www.yilongrefractory.com/AllProductServlet?id=4&number=20
2016年6月29日星期三
Key Factors For The Casting Process Of Fused Cast AZS
The casting speed determines the casting time. Every casting products has its best casting time. Improper insulating castable casting time will cause many defects. If the casting speed is too fast, the stream will be coarse and the flowing speed will be too fast, which will produce big impact force on the mold. The force may destroy or melt the refractory brick mold and cause protrusions. Additionally, gas will be brought into the mold and produce a thin shell filled with gas and bubbles in the casting. Besides gas, raw materials in the furnace mouth may be brought into the melt and cause defects. Conversely, if the casting speed is too slow, it will produce defects such as loose corners, knots, sand and pouring shortage.
Back pour refers to the process of repouring some melt into the shrinkage cavities after the casting is completed. Generally, refractory brick for sale small bricks are solidified quickly and do not require back pour. Medium bricks can be repoured. Large bricks require back pour and it takes a long time. Back pour is one of the effective ways to reduce the shrinkage cavities and improve the bulk density.
Casting is an important step of the manufacturing process that has great influence on the quality of the fused cast AZS block. Key factors that affect the casting process of fused cast refractories AZS include the casting temperature, casting speed, the casting time and back pour.
The casting temperature is the temperature of the melt when it is poured into the mold. The casting temperature of fused cast AZS can be as high as 1820-1840℃. The viscosity of the melt is up to the chemical composition and temperature of the melt. The chemical composition is up to the formulation. The casting temperature is crucial since the higher the temperature, the lower the viscosity, the better the flow-ability. However, if the temperature is too high, the temperature difference between the casting and the mold is small, which will increase the shrinkage stress and cause cracks.
refractory company Henan Xinmi Changxing Refractory Material Co., Ltd. Located in Henan Province,China.ChangXing's product portfolio covers shaped products such as refractory materials,refractory brick, refractory castable,refractory nozzle, ceramic fiber, slide gate, etc; unshaped products including repair, construction and casting mixes and mortars.exported to more than 20 countries, such as Thailand, Indonesia, Pakistan, Saudi Arabia, South Africa, Turkey, Iran, Iraq and so on.
Back pour refers to the process of repouring some melt into the shrinkage cavities after the casting is completed. Generally, refractory brick for sale small bricks are solidified quickly and do not require back pour. Medium bricks can be repoured. Large bricks require back pour and it takes a long time. Back pour is one of the effective ways to reduce the shrinkage cavities and improve the bulk density.
Casting is an important step of the manufacturing process that has great influence on the quality of the fused cast AZS block. Key factors that affect the casting process of fused cast refractories AZS include the casting temperature, casting speed, the casting time and back pour.
The casting temperature is the temperature of the melt when it is poured into the mold. The casting temperature of fused cast AZS can be as high as 1820-1840℃. The viscosity of the melt is up to the chemical composition and temperature of the melt. The chemical composition is up to the formulation. The casting temperature is crucial since the higher the temperature, the lower the viscosity, the better the flow-ability. However, if the temperature is too high, the temperature difference between the casting and the mold is small, which will increase the shrinkage stress and cause cracks.
refractory company Henan Xinmi Changxing Refractory Material Co., Ltd. Located in Henan Province,China.ChangXing's product portfolio covers shaped products such as refractory materials,refractory brick, refractory castable,refractory nozzle, ceramic fiber, slide gate, etc; unshaped products including repair, construction and casting mixes and mortars.exported to more than 20 countries, such as Thailand, Indonesia, Pakistan, Saudi Arabia, South Africa, Turkey, Iran, Iraq and so on.
2016年6月6日星期一
Properties and applications of fused cast AZS
tundish well block the most widely used fused cast refractory brick. According to the ZrO2 content, it can be divided into 33#, 36# and 41#AZS.
Fused cast AZS magnesia carbon brick containing 33% ZrO2 is called 33# fused cast AZS; fused cast AZS containing 36% ZrO2 is called 36# fused cast AZS; fused cast AZS containing 41% ZrO2 is called 41# fused cast AZS.
Fused cast AZS is mainly composed of baddeleyite and corundum and their eutectic crystals. High viscosity glass phase is filled in the gaps of crystals. The crystals is directly precipitated monoblock stopper from the molten liquid and well developed. So, it has large crystal particles and stable crystal phase. Except the voids, it has compact structure and better density than the common sintered bricks. The pores are mainly closed pores and the crystals are intertwined each other, so it ladle slide gate has good mechanical properties and wear resistance. The impurities are difficult to invade the bricks. Therefore, this refractory brick has good corrosion resistance. besides, the transformation of ZrO2 at 900~1150℃ when heating or cooling may cause irregular deformation.
Fused cast AZS block can be used in areas in direct contact with molten metals and molten slags. It is the essential material used in the key areas that suffer from severe corrosion.
refractory company Henan Xinmi Changxing Refractory Material Co., Ltd. Located in Henan Province,China.ChangXing's product portfolio covers shaped products such as refractory materials,refractory brick, refractory castable,refractory nozzle, ceramic fiber, slide gate, etc; unshaped products including repair, construction and casting mixes and mortars.exported to more than 20 countries, such as Thailand, Indonesia, Pakistan, Saudi Arabia, South Africa, Turkey, Iran, Iraq and so on.
Nest article:
Fused cast AZS magnesia carbon brick containing 33% ZrO2 is called 33# fused cast AZS; fused cast AZS containing 36% ZrO2 is called 36# fused cast AZS; fused cast AZS containing 41% ZrO2 is called 41# fused cast AZS.
Fused cast AZS is mainly composed of baddeleyite and corundum and their eutectic crystals. High viscosity glass phase is filled in the gaps of crystals. The crystals is directly precipitated monoblock stopper from the molten liquid and well developed. So, it has large crystal particles and stable crystal phase. Except the voids, it has compact structure and better density than the common sintered bricks. The pores are mainly closed pores and the crystals are intertwined each other, so it ladle slide gate has good mechanical properties and wear resistance. The impurities are difficult to invade the bricks. Therefore, this refractory brick has good corrosion resistance. besides, the transformation of ZrO2 at 900~1150℃ when heating or cooling may cause irregular deformation.
Fused cast AZS block can be used in areas in direct contact with molten metals and molten slags. It is the essential material used in the key areas that suffer from severe corrosion.
refractory company Henan Xinmi Changxing Refractory Material Co., Ltd. Located in Henan Province,China.ChangXing's product portfolio covers shaped products such as refractory materials,refractory brick, refractory castable,refractory nozzle, ceramic fiber, slide gate, etc; unshaped products including repair, construction and casting mixes and mortars.exported to more than 20 countries, such as Thailand, Indonesia, Pakistan, Saudi Arabia, South Africa, Turkey, Iran, Iraq and so on.
Nest article:
Introduction of Changxing Refractory self-flow castable
2016年6月5日星期日
Chemical composition of fire clay bricks
 |
| The use of the bricks can reduce the heat capacity of kiln walls and promote the heat efficiency of kilns. The product is applicable for constructing industrial kilns and inner lining of kilns. |
The main raw material is firebrick refractory clay. Clay is an earthy mineral. It can form plastic mud pie when mixed with water and maintain the shape after drying. It has rock-like hardness after fired at high temperature.
Additionally, the clay contains a certain amount of impurities such as quartz, mica, pyrite, feldspar and organic substances. The impurities, especially iron, can reduce the quality of clay refractory brick for sale and are harmful to the fire clay bricks.
Alkalis such as Na2O and K2O exist as mica. It can improve the sintering properties of clay and form dense products after sintered. It should be fewer than 2%.
The content of CaO is generally ladle refractory under 11.5% and distributed evenly. So, it will not affect the refractory properties of raw materials.
There is a certain amount of TiO2 in the bond clay. It exists as diamond. When it is less than 1%, it has no big effect on the quality of bond clay. In the chemical analysis, its content is not tested alone but counted in the content of A1203 + TiO2.
When the impurities in the clay exceed 6%, the refractories of clay will decease and cannot be used as the raw materials. The content of organic substances in the clay is fluctuated greatly, up to 5%.
refractory company Henan Xinmi Changxing Refractory Material Co., Ltd. Located in Henan Province,China.ChangXing's product portfolio covers shaped products such as refractory materials,refractory brick, refractory castable,refractory nozzle, ceramic fiber, slide gate, etc; unshaped products including repair, construction and casting mixes and mortars.exported to more than 20 countries, such as Thailand, Indonesia, Pakistan, Saudi Arabia, South Africa, Turkey, Iran, Iraq and so on.
Nest article:
Application of monolithic refractories on industrial furnaces
2016年6月1日星期三
Molding methods of refractories and widely used refractories
There are many refractory material molding methods, such as common molding method, vibration extrusion method, extrusion method, pounding method and so on.
At present, when it comes to the production of firebrick refractory materials, the most frequent way of molding refractory material is machine pressure molding method which is a way using brick molding machine and mold to compress the clay material into body. because the clay contains 5% water it is called semi-dry molding method. Machine molding is with compact structure, high strength, narrow drying and firing way, and size is also easy to control.castable It can be divided into the single side pressure, and double sides pressure which can reduce the phenomenon of layer density.
refractory company The common refractory material are AZS brick, corundum brick, magnesite chrome brick, directly silica carbide, silicon carborundum brick, nitrides, silicides, sulfide, boride, carbide and other non oxide refractories materials; Calcium oxide, chromium oxide, aluminum oxide, magnesium oxide and so on..
Article source:
Nest article:
2016年5月31日星期二
What is Magnesium Silicate Insulation Board
The shell temperature of test ladle that takes Magnesium Silicon Thermal Insulation Board as liner is insulating castable much lower than that of common ladle, which averagely reduces 75℃, while the maximum temperature reduction will be about 120℃. Therefore, the board application will facilitate to eliminate the deformation of ladle refractory brick shell materials, and greatly improve operation environment of ladle. The temperature drop rate of molten steel is smaller than that of common ladle, namely average 0.3~0.5℃/min. It indicates that the heat preservation of molten steel is quite great, which can not only save energy and heat losses, but also is beneficial for the constant temperature and rate during steel casting process to ensure the smooth continuous casting.
Magnesium Silicate Insulation refractory brick for sale Board is mainly used for metallurgy, building materials, furnace heat preservation, fireproof materials, etc. compared to other insulation materials, it is easy to install and cut and has no pollution to the environment, no irritation to skin and no loss during the construction.
Magnesium Silicate Insulation ladle refractory Board is a new lightweight insulation material with low thermal conductivity, good insulation properties and heat resistance.
The Magnesium Silicate Insulation board is made of sepiolite matrix material (mainly magnesium silicate) by pulping, molding, forming and drying. Within the operating temperature range, it can be used for a long term without aging and deterioration. It is non-toxic and odorless.
The Magnesium Silicate Insulation board features with high structural strength, low deformation after sintering, fine heat-conducting property and damp-proof. Especially its physical performance is quite stable under high-temperature operation. The application of this board can promote the volume stability of the whole liner, reduce furnace surface temperature, eliminate operating force among bricks, so as to ensure furnace’s safety performance and effectively save the energy.
Henan Xinmi Changxing Refractory Material Co., Ltd. Located in Henan Province,China.ChangXing's product portfolio covers shaped products such as refractory materials,refractories brick, refractory castable,refractory nozzle, ceramic fiber, slide gate, etc; unshaped products including repair, construction and casting mixes and mortars.exported to more than 20 countries, such as Thailand, Indonesia, Pakistan, Saudi Arabia, South Africa, Turkey, Iran, Iraq and so on.
Next article:
http://www.yilongrefractory.com/industry_news.jsp
Magnesium Silicate Insulation refractory brick for sale Board is mainly used for metallurgy, building materials, furnace heat preservation, fireproof materials, etc. compared to other insulation materials, it is easy to install and cut and has no pollution to the environment, no irritation to skin and no loss during the construction.
Magnesium Silicate Insulation ladle refractory Board is a new lightweight insulation material with low thermal conductivity, good insulation properties and heat resistance.
The Magnesium Silicate Insulation board is made of sepiolite matrix material (mainly magnesium silicate) by pulping, molding, forming and drying. Within the operating temperature range, it can be used for a long term without aging and deterioration. It is non-toxic and odorless.
The Magnesium Silicate Insulation board features with high structural strength, low deformation after sintering, fine heat-conducting property and damp-proof. Especially its physical performance is quite stable under high-temperature operation. The application of this board can promote the volume stability of the whole liner, reduce furnace surface temperature, eliminate operating force among bricks, so as to ensure furnace’s safety performance and effectively save the energy.
Henan Xinmi Changxing Refractory Material Co., Ltd. Located in Henan Province,China.ChangXing's product portfolio covers shaped products such as refractory materials,refractories brick, refractory castable,refractory nozzle, ceramic fiber, slide gate, etc; unshaped products including repair, construction and casting mixes and mortars.exported to more than 20 countries, such as Thailand, Indonesia, Pakistan, Saudi Arabia, South Africa, Turkey, Iran, Iraq and so on.
Next article:
http://www.yilongrefractory.com/industry_news.jsp
2016年5月26日星期四
Reasons of why tundish dry vibration mix takes the place of tundish insulation board
Following the clay and high alumina brick, tundish insulation board, tundish coating, Dry vibration mix is the fourth working lining materials for tundish. Following compare shows why dry vibration mix could replace the insulation board successfully.
Insulation board, which is mainly used in cold tundish (one without baking before being used), it devotes much for us in energy saving and heat insulation. But, due to its fatal disadvantage, it is being eliminated quickly.
1. Bonded with many agent, insulation board add silica and hydrogen under high temperature in steel liquid, reduce its purity, produce harmful gas to hurt workers health. VS: Dry vibration mix is bonded without carbon, produce no sharp aroma, and greatly reduce avoid the pollution for steel liquid and environment.
2. Short using life (for common steel, only 8 Hrs, For Mn-alloy steel, only 4hrs). VS: dry vibration mix usual using life: min 24 hrs, when worked with the fast exchange nozzle, it could reach average using life 45hrs.
3. Easy to be broken during transportation, once one piece is broken, the whole set will can not be work. VS: dry vibration is premixed and packaged in waterproof jumbo, applicable for ship, truck, train, air, etc long way transportation. 4. Low corrosion resistance, easy to make tundish become leakage. VS: dry vibration mix is made by ramming, dense and stable, after sintering, form a protect layer with tundish backing layer, could improve tundish using life and reduce spare tundish number.
Therefore, should you want to improve your tundish life, please do not hesitate to try Changxing Refractory dry vibration mix, 24 hrs using life is waiting for you.
Article source：
Reasons of why tundish dry vibration mix takes the place of tundish insulation board
Next article：
The Chinese New Year has passed and Changxing Refractory is back
Insulation board, which is mainly used in cold tundish (one without baking before being used), it devotes much for us in energy saving and heat insulation. But, due to its fatal disadvantage, it is being eliminated quickly.
1. Bonded with many agent, insulation board add silica and hydrogen under high temperature in steel liquid, reduce its purity, produce harmful gas to hurt workers health. VS: Dry vibration mix is bonded without carbon, produce no sharp aroma, and greatly reduce avoid the pollution for steel liquid and environment.
2. Short using life (for common steel, only 8 Hrs, For Mn-alloy steel, only 4hrs). VS: dry vibration mix usual using life: min 24 hrs, when worked with the fast exchange nozzle, it could reach average using life 45hrs.
3. Easy to be broken during transportation, once one piece is broken, the whole set will can not be work. VS: dry vibration is premixed and packaged in waterproof jumbo, applicable for ship, truck, train, air, etc long way transportation. 4. Low corrosion resistance, easy to make tundish become leakage. VS: dry vibration mix is made by ramming, dense and stable, after sintering, form a protect layer with tundish backing layer, could improve tundish using life and reduce spare tundish number.
Therefore, should you want to improve your tundish life, please do not hesitate to try Changxing Refractory dry vibration mix, 24 hrs using life is waiting for you.
Article source：
Reasons of why tundish dry vibration mix takes the place of tundish insulation board
Next article：
The Chinese New Year has passed and Changxing Refractory is back
2016年5月23日星期一
Fire clay bricks manufacturing process
 |
Generality High Alumina Brick &Clay Brick |
1)Obtain raw materials. tundish well block The clay for manufacturing bricks is obtained from the ancient soil deep under the earth’s surface. The soil in this layer is slightly deeper in color
than the topsoil and was formed about 80,000 to 120,000 years ago. At that time, the climate is warm and humid and plants are diverse and lush , which mades the soil in this
period soft and sticky and a Clay, High Alumina insulating bricks good raw material for fireclay bricks.
2)The clay is stacked in the open air for up to six months to make its inner structure loose. Then it is zirconium sizing nozzle crushed and screened to get the pure fine clay.
3)Add water to the clay and then repeat kneading to make it into thick mud. This step is very important for the finished products.
4)Puur the mud into the mold. tundish coating Compact it and then remove the remaining mud with a wire bow.
5)Release the green body from the mold and dry it in the shadow to avoid cracks and deformation caused by exposure to the sun.
6)After drying, fire bricks in the kiln. This process is the most important part of the brick-manufacturing process.
7)After ten days of firing, the green body is basically sintered. if stopping heating at this time, the outside air may come into the kiln and make the bricks oxidized into red
bricks. in order to prevent oxidazing, seal the kiln roof with clay.
Henan Xinmi Changxing Refractory Material Co., Ltd. Located in Henan Province,China.ChangXing's product portfolio covers shaped products such as refractory materials,refractory brick, refractory castable,refractory nozzle, ceramic fiber, slide gate, etc; unshaped products including repair, construction and casting mixes and mortars.exported to more
than 20 countries, such as Thailand, Indonesia, Pakistan, Saudi Arabia, South Africa, Turkey, Iran, Iraq and so on.
2016年5月17日星期二
The advantages of Changxing lightweight insulation brick
nozzle refractory Compared to the traditional "galvanized plate+ insulation cotton" duct, Changxing lightweight insulation brick has the following advantages.
Changxing lightweight insulation brick, using high pure mullite as raw material, is made by adding alumina dry vibration mix powder according to different type and then sintering in high temperature.
1. The energy-saving effects of lightweight insulation brick can be increased by 10% to 15%, having more advantages than the traditional products on energy-saving and insulation aspects
2. Compared to traditional covering agent products, the new lightweight insulation brick’s service life extends three times.
3. When contacting burning fire, lightweight insulation brick is non-smoking and non-toxic gases being released.
4. When lightweight insulation brick used in construction, no condensation water produced, sealing effect is much better.
5. At the same time lightweight insulation brick can reduce 5 to 10 decibels noise.
6. Lightweight firebrick refractory sale insulation brick can shorten project duration 3 to 5 times, reduce 20% project cost
7. Lightweight insulation brick’s output up to 120,000 pieces / day, assure prompt delivery.
8. Manufactured as per ASTM standard
Above all, compared with traditional products, Changxing lightweight insulation brick from insulation effect and environmental protection aspects is more advantageous and it has low cost and strong seal . Applied in smelting furnace, firing kiln, flue, refining apparatus, heating apparatus, reproducing apparatus, gas stoves and pipes, soaking furnace, annealing furnace, reaction chambers, and other similar industrial heat treat equipment.
Changxing lightweight insulation brick, using high pure mullite as raw material, is made by adding alumina dry vibration mix powder according to different type and then sintering in high temperature.
1. The energy-saving effects of lightweight insulation brick can be increased by 10% to 15%, having more advantages than the traditional products on energy-saving and insulation aspects
2. Compared to traditional covering agent products, the new lightweight insulation brick’s service life extends three times.
3. When contacting burning fire, lightweight insulation brick is non-smoking and non-toxic gases being released.
4. When lightweight insulation brick used in construction, no condensation water produced, sealing effect is much better.
5. At the same time lightweight insulation brick can reduce 5 to 10 decibels noise.
6. Lightweight firebrick refractory sale insulation brick can shorten project duration 3 to 5 times, reduce 20% project cost
7. Lightweight insulation brick’s output up to 120,000 pieces / day, assure prompt delivery.
8. Manufactured as per ASTM standard
Above all, compared with traditional products, Changxing lightweight insulation brick from insulation effect and environmental protection aspects is more advantageous and it has low cost and strong seal . Applied in smelting furnace, firing kiln, flue, refining apparatus, heating apparatus, reproducing apparatus, gas stoves and pipes, soaking furnace, annealing furnace, reaction chambers, and other similar industrial heat treat equipment.
2016年5月12日星期四
Introduction of Changxing Refractory self-flow castable
According to the solid theory and the actual service condition of refractory material, Changxing Refractory developed the high-tech self-flow castables after a series of test. Without vibration, self-flow castables can be degassed and leveled by gravity and thereby become compact.
..........................
http://www.yilongrefractory.com/news/Introduction%20of%20Changxing%20Refractory%20self-flow%20castable.html
..........................
http://www.yilongrefractory.com/news/Introduction%20of%20Changxing%20Refractory%20self-flow%20castable.html
2016年5月8日星期日
How to Identify High-Quality Polycrystalline Mullite Fiber
Pretend pretend to user to user the user the information sent back by the close paragraph of time, refractory company according to our sales department, with the high temperature refractories fiber industry boom will continue to improve, the market began to have some production capacity, quality assurance, no after-sales service "three noes" manufacturers or companies, through some of the heat treatment of high temperature refractory ceramic fiber knowledge understanding is not very comprehensive, through some of the heat treatment of high temperature refractory ceramic fiber application of risk, safety awareness is relatively low, through the network propaganda means low price induced heat treatment, the tolerance to low temperature resistant to high temperature, the poor quality of the products high quality, sold to heat treatment of users. High temperature fiber (polycrystalline mullite fiber, alumina fiber production process control requirements are relatively high, which glue: sol gel, and fiber: hot air temperature, pressure, speed, drying, heat treatment, hot processing temperature and time process data must control precision, or after use will appear fiber lined with severe refractory brick for sale contraction, powder, cracks and peeling off, resulting in the fire channelling. It not only damages the industrial furnace equipment, also caused the safety problems in industrial furnace, to heat treatment user brought no small loss.
Refractory fibre is a kind of a white fibrous lightweight refractory material, if not a professional general visual it is difficult not the quality of the material and high temperature levels, part of the "three noes" of the manufacturers or companies violate integrity management
Refractory fibre is a kind of a white fibrous lightweight refractory material, if not a professional general visual it is difficult not the quality of the material and high temperature levels, part of the "three noes" of the manufacturers or companies violate integrity management
Ceramic Rope
Features:
Perfectly finished
Maximum strength
Surpassed quality
http://www.yilongrefractory.com/ProductServletOne?id1=5&id=67
2016年5月6日星期五
The application of different kinds of refractory materials
refractories
A larger ladle refractory amount of silica brick and clay. Brick containing more than 93% SiO2 siliceous products, raw materials used are silica, silica brick and other waste. Brick acid-resistant slag erosion ability, but are vulnerable to erosion of basic slag, its high load softening temperature, close to its refractoriness, the volume does not shrink after repeated firing, and even a slight expansion, but anti-refractory abrasive
Poor thermal shock resistance. Mainly used for coke oven silica brick, glass melting furnaces, steel furnaces and other acidic thermal equipment. Bricks containing 30% to 46% alumina, refractory castable refractory clay it as the main raw material, refractoriness 1580 ~ 1770 ℃, thermal shock resistance, weak acid belongs refractory to acid slag have corrosion resistance, widely used, The current production capacity is the largest category of refractories.
Neutral refractory
High aluminum products in the main crystal phase is mullite and corundum, corundum content increases with increasing alumina content and containing more than 95% of refractory company alumina corundum products is a wider use of high-quality refractory materials. Chrome brick mainly chrome ore as raw material, the main phase is chromite. It slag corrosion resistance, but poor thermal shock resistance, high temperature load deformation temperature is low. Chrome ore and magnesite in different proportions of chrome magnesia brick made good thermal shock resistance, mainly used for basic flat roof tiles. Carbonaceous products are another neutral refractories, according to the carbonaceous feedstock composition and mineral products, divided into carbon bricks, graphite products and silicon carbide products categories. Carbon brick with high-grade petroleum coke as feedstock, plus tar, bitumen as a binder, at 1300 ℃ firing isolation under atmospheric conditions. Graphite products (except natural graphite outside) by 2500 ~ 2800 ℃ graphitized carbonaceous material obtained in an electric furnace. Places carbide silicon carbide products as raw materials, plus clays, binders such as silica calcined at 1350 ~ 1400 ℃. Silicon carbide can also be added to the silicon powder in an electric furnace under a nitrogen atmosphere castable is made of silicon nitride - silicon carbide products. Refractory Abrasives coefficient of thermal expansion of the low carbon products, high thermal conductivity, good thermal shock resistance, high temperature strength. fire bricks Long-term use at high temperatures do not soften, without any acid-base erosion, good salt tolerance, but also from metal and slag wetting, lightweight, high-quality refractory materials. The disadvantage is easily oxidized at high temperatures, it should not be used in an oxidizing atmosphere. Carbonaceous products are widely used in high temperature furnace lining (hearth, hearth, the lower part of the furnace body, etc.), non-ferrous metal smelting furnace lining. Graphite products can do the reaction vessel and petrochemical lined autoclave. Silicon carbide and graphite products can also be made with gold and copper smelting crucible with light alloy.
Basic Refractories
With magnesium products as a representative. It contains magnesium more than 80% to 85%, based on periclase main crystal phase. The main raw materials to produce magnesia brick of magnesite, seawater magnesia extracted from the sea by high temperature calcination of magnesium hydroxide) and the like. Alkaline slag and iron slag has good resistance. Polycrystalline mullite fiber melting point of pure magnesium oxide up 2800 ℃, therefore, magnesia brick refractoriness than the clay bricks and brick are high. Since the mid-1950s, the use of open hearth furnace and basic oxygen converter steel roof, basic refractories production increasing adoption, clay and silica brick production is declining. Basic Refractories mainly used open hearth, oxygen converter, electric furnace, non-ferrous metal smelting as well as some high-temperature thermal equipment.
A larger ladle refractory amount of silica brick and clay. Brick containing more than 93% SiO2 siliceous products, raw materials used are silica, silica brick and other waste. Brick acid-resistant slag erosion ability, but are vulnerable to erosion of basic slag, its high load softening temperature, close to its refractoriness, the volume does not shrink after repeated firing, and even a slight expansion, but anti-refractory abrasive
Poor thermal shock resistance. Mainly used for coke oven silica brick, glass melting furnaces, steel furnaces and other acidic thermal equipment. Bricks containing 30% to 46% alumina, refractory castable refractory clay it as the main raw material, refractoriness 1580 ~ 1770 ℃, thermal shock resistance, weak acid belongs refractory to acid slag have corrosion resistance, widely used, The current production capacity is the largest category of refractories.
Neutral refractory
High aluminum products in the main crystal phase is mullite and corundum, corundum content increases with increasing alumina content and containing more than 95% of refractory company alumina corundum products is a wider use of high-quality refractory materials. Chrome brick mainly chrome ore as raw material, the main phase is chromite. It slag corrosion resistance, but poor thermal shock resistance, high temperature load deformation temperature is low. Chrome ore and magnesite in different proportions of chrome magnesia brick made good thermal shock resistance, mainly used for basic flat roof tiles. Carbonaceous products are another neutral refractories, according to the carbonaceous feedstock composition and mineral products, divided into carbon bricks, graphite products and silicon carbide products categories. Carbon brick with high-grade petroleum coke as feedstock, plus tar, bitumen as a binder, at 1300 ℃ firing isolation under atmospheric conditions. Graphite products (except natural graphite outside) by 2500 ~ 2800 ℃ graphitized carbonaceous material obtained in an electric furnace. Places carbide silicon carbide products as raw materials, plus clays, binders such as silica calcined at 1350 ~ 1400 ℃. Silicon carbide can also be added to the silicon powder in an electric furnace under a nitrogen atmosphere castable is made of silicon nitride - silicon carbide products. Refractory Abrasives coefficient of thermal expansion of the low carbon products, high thermal conductivity, good thermal shock resistance, high temperature strength. fire bricks Long-term use at high temperatures do not soften, without any acid-base erosion, good salt tolerance, but also from metal and slag wetting, lightweight, high-quality refractory materials. The disadvantage is easily oxidized at high temperatures, it should not be used in an oxidizing atmosphere. Carbonaceous products are widely used in high temperature furnace lining (hearth, hearth, the lower part of the furnace body, etc.), non-ferrous metal smelting furnace lining. Graphite products can do the reaction vessel and petrochemical lined autoclave. Silicon carbide and graphite products can also be made with gold and copper smelting crucible with light alloy.
Basic Refractories
With magnesium products as a representative. It contains magnesium more than 80% to 85%, based on periclase main crystal phase. The main raw materials to produce magnesia brick of magnesite, seawater magnesia extracted from the sea by high temperature calcination of magnesium hydroxide) and the like. Alkaline slag and iron slag has good resistance. Polycrystalline mullite fiber melting point of pure magnesium oxide up 2800 ℃, therefore, magnesia brick refractoriness than the clay bricks and brick are high. Since the mid-1950s, the use of open hearth furnace and basic oxygen converter steel roof, basic refractories production increasing adoption, clay and silica brick production is declining. Basic Refractories mainly used open hearth, oxygen converter, electric furnace, non-ferrous metal smelting as well as some high-temperature thermal equipment.
2016年5月5日星期四
Being one of the reputed organizations in the market
we are engaged in offering an exclusive range of Ceramic Fiber Braided Rope. Popular for their abrasion refractory material resistance feature, offered braided ropes are manufactured by our capable vendors using unequaled quality material and cutting edge tools. alumina brick Provided range is obtainable in various specifications refractory brick and modified options as per clients’ diversified necessities.
Features:
Perfectly finished
Maximum strength
Surpassed quality
http://www.yilongrefractory.com/news/Several%20types%20and%20application%20of%20ceramic%20fibers.html
Features:
Perfectly finished
Maximum strength
Surpassed quality
http://www.yilongrefractory.com/news/Several%20types%20and%20application%20of%20ceramic%20fibers.html
2016年5月3日星期二
Refractory Material-Silica Brick
Silica brick belongs to refractory material, with acid erosion ability, its thermal conductivity, high refractoriness under load, generally less than 1620 DEG C, only the ratio of its low refractoriness 70~80 C. The thermal conductivity of silicon increases with the increase of the working temperature, no residual shrinkage, in the baking process, the silica volume increases with temperature. So, brick is the ideal of Clay, High Alumina insulating bricks the coke oven refractory products, an important part of the large and medium (such as coke oven combustion chamber, ramps and regenerator) with brick masonry.
In the drying process, magnesia carbon brick brick maximum expansion occurs in 100~300 DEG C, 300 expansion before the total amount of expansion is about 70%~75%. The reason is that SiO2 appears in the baking process in 117 C, 163 C and 180~270 degrees and 573 degrees four points between the crystal transformation, 180~270 C, caused by the volume expansion of the largest square quartz.
Key to determine the thermal stability of ladle gunning mix silica brick quality is true density, true density size is one of the important signs of the transformation of quartz. The true density of silicon is smaller, the lime into more completely and the residual in the oven in the process of expansion is small.
In the brick, the scales of quartz crystal true density, linear expansion rate, thermal stability such as quartz and quartz, slag resistance, good thermal conductivity, high refractoriness under load, the volume is the most stable in the form of quartz. Good brick firing, tridymite content is the highest, accounting for 50%~80% times; cristobalite, accounted for only 10%~30%; and quartz and glass phase content in the range of 5%~15%.
 |
| High strength, abrasion resistance, low resistance to carbon deposition of iron oxide, strong ability. |
Key to determine the thermal stability of ladle gunning mix silica brick quality is true density, true density size is one of the important signs of the transformation of quartz. The true density of silicon is smaller, the lime into more completely and the residual in the oven in the process of expansion is small.
In the brick, the scales of quartz crystal true density, linear expansion rate, thermal stability such as quartz and quartz, slag resistance, good thermal conductivity, high refractoriness under load, the volume is the most stable in the form of quartz. Good brick firing, tridymite content is the highest, accounting for 50%~80% times; cristobalite, accounted for only 10%~30%; and quartz and glass phase content in the range of 5%~15%.
订阅：
博文 (Atom)