New Types of Refractory For The Glass Furnace

Low cement castable can be widely used for those industrial furnace's working lining, permanent lining( working temperature under 1400c), such as little refining Ladle cover, Ladle & Tundish permanent layer, heating furnace working wall, top and bottom. Blast furnace body, Hot metal ladle permanent layer.

Fused cast AZS block has been successfully used in the crown for many years. It can be used at 1600℃ or 1650℃ and can withstand the cycle of cooling and heating well. Compared to fused cast AZS, fused cast alumina block 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.

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Suggestions On The Proper Use Of Fused Cast AZS

The products are produced by corundum and chromium oxide as main materials, formed from casting, after being treated under high temperature, it has high hot strength and good wear resistance, suitable for making the slide rail part of heating furnace.

For structures constructed with fused cast AZS and 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

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.

Do you know how the slay ball content influences quality of ceramic fiber paper

The slay ball density is 10 times more than ceramic fiber paper, if the content is too high, it will change the original arrangement structure of the fiber.Ceramic fiber paper’s refractory fiber board density range is 200±20kg/m3. Slay ball’s density range is 2800-3200kg/m3, is 10 times more than ceramic fiber paper. So the content of slay ball directly influences the quality of ceramic fiber paper.The high insulating castable content means lots of crystal grain in ceramic fiber paper, making the flatness and evenness worse. From the surface, some small raised can be seen. The internal fiber bulk’s structure of ceramic fiber paper with good evenness is tight and closed, so the thermal insulation is better. refractory material The internal fiber bulk’s structure of ceramic fiber paper with high slay content becomes worse , holes becomes larger, so making the alumina brick closure property worse, convection heat transfer increases, total heat transfer coefficient increases. All of the above lead to the worse of thermal insulation.The slay ball change the change the original arrangement structure of the fiber, widen the space of fibers, heavily lowering the strength of ceramic fiber paper, once the strength becomes lower, it will leading to the abradability and electrical insulation of ceramic fiber paper worse,refractories reducing the heat insulating ability and utilization rate of ceramic fiber paper.So, we can see it that the amount of slay-removal steps directly influences the slay ball content, then influences the quality of ceramic fiber paper.Changxing ceramic fiber paper is produced by 9 slay-removal steps, the slay ball content is lower than similar products, so the abradability and electrical insulation of ceramic fiber paper is better.

your company should need energy-saving building materials green low carbon development---Ceramic fiber cloth

1. Lightweight and low thermal conductivity2. Excellent insulation at high temperature3. Strong and abrasive, and can b used in tough environment4. Good tensile strength 5. No inflammability

Ceramic fiber cloth with good performance, not only can be used for lining the inner wall of the heat preservation heat insulation materials in high temperature apparatus sealing material, refractory fiber board refrigerator insulation materials, building materials, heat insulation, sound insulation, fire prevention materials, insulating castable metallurgy, chemical industry, oil insulation thermal insulation materials such as, can also be used for aviation, aerospace insulation, thermal insulation material, the prospect is very broad

Due to its combination of inorganic fiber, so often need to use adhesive. Organic binder with acrylic refractory material resin, polyurethane emulsion, poly (vinyl esters and acrylonitrile and butyl acrylate polymer, polyvinyl alcohol and used, but these organic material under the high temperature, malodorous produce harmful gases, reduce paper quality etc., so also uses the colloidal silica and sodium silicate and aluminium phosphate inorganic binder .


In order to analyze different kinds of inorganic adhesive effect on the properties of ceramic fiber paper, the chosen alumina silicate sodium aluminum sulfate and ammonia three inorganic adhesive, and on them were pairwise experiments: liquid alumina brick alumina and sodium silicate, colloidal alumina and water glass and colloidal alumina and aluminum sulfate - ammonia. The ceramic fiber paper physical properties for the determination of loss on ignition, to investigate the different effects of various adhesive systems with different kinds of adhesive and different adhesive composite papermaking ceramic fiber paper.

Building energy-saving firebrick refractory energy-saving emission reduction effective way of building energy consumption accounted for than 28%, the high energy consumption, low standard of building energy conservation in our country, poor enforcement, the future energy-saving potential; building energy consumption is the main source of building energy consumption, decided to use the energy consumption of the main factors is the wall material; and developed countries ratio, our country currently used the proportion of new wall materials is very low, led to the huge difference between our country and the developed countries, building energy consumption.

Energy saving refractory brick for sale building materials industry life cycle of the development of building materials industry in China is in a similar background, and the development of low-carbon economy in China is in Copenhagen. The development of LOW-E glass, gypsum board, ceramic fiber and PVC is the four sub sectors in the future, and the future development of China is in the future.


Industry leading companies will get considerable development we think production capacity and market share in absolutely dominant position, have a certain monopoly advantage and management ability in the industry leading level of the industry leader, will enjoy growth, both in industry and the company.

To give energy saving building materials industry, good rating as the two aspects of the energy saving and emission reduction and open source, energy saving building materials and new energy future growth space is huge, but the valuation of building materials industry is far lower than the new energy industry.

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
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Silicon nitride is a chemical compound of silicon and nitrogen

In addition to Si3N4, refractory material several other silicon nitride phases (with chemical formulas corresponding to varying degrees of nitridation/Si oxidation state) have been reported in the literature, for example, the gaseous disilicon mononitride (Si2N); silicon mononitride (SiN), and silicon sesquinitride (Si2N3), each of which are stoichiometric phases. As with other refractories, the products obtained in these high-temperature syntheses depends on the reaction conditions (e.g. time, temperature, and starting materials including the reactants and container materials), as well as the mode of purification. However, the refractory fiber board existence of the sesquinitride has since come into question.

Silicon Nitride Product : Silicon nitride is a chemical compound of silicon and nitrogen. If powdered silicon is heated between 1300 °C and 1400 °C in an atmosphere of nitrogen, trisilicon tetranitride, Si3N4 is formed. The silicon sample weight increases progressively due to the chemical combination of silicon and nitrogen. Without clay insulating bricks an iron catalyst, the reaction is complete after several hours (~7), when no further weight increase due to nitrogen absorption (per gram of silicon) is detected.

The Si3N4 phase is the most chemically inert (being decomposed by dilute HF and hot H2SO4). It is also the most thermodynamically stable of the silicon nitrides. Hence, Si3N4 is the most commercially important of the silicon nitrides and is generally castable refractory material understood as what is being referred to where the term "silicon nitride" is used. Silicon Nitride Product

Silicon Nitride Product : Silicon nitride (i.e. Si3N4) is a hard ceramic having high strength over a broad temperature range, moderate thermal conductivity, low coefficient of thermal expansion, moderately high elastic modulus, and unusually high fracture toughness for a ceramic. This combination of properties leads to excellent thermal shock resistance, ability to withstand high structural loads to high temperature, and superior wear resistance. Silicon nitride is mostly used in high-endurance and high-temperature applications, such as gas turbines, car engine parts, bearings and metal working and cutting tools. Silicon nitride bearings are used in the main engines of the NASA's Space shuttles. Thin silicon nitride films are a popular insulating layer in silicon-based electronics and silicon nitride cantilevers are the sensing parts of atomic force microscopes.

The manufacture of refractories involve the following steps

1. Grinding
Raw materials crushed and refractory castable ground to fine powder using crushers, pulveriser, ball mills.

2. Mixing
In order to alter the chemical properties of the refractories, two or more powdered raw materials are thoroughly mixed with a suitable binding material, which makes moulding easier.

3. Moulding
Moulding can ladle refractory be done either manually or mechanically by application of high pressure.
Hand-moulding produces refractories of low strength and low density. Mechanical-moulding produces refractory brick for sale of high strength and high density

4. Drying
Drying is carried out slowly to the moisture from refractories.

5. Firing
It is done at a temperature as high as or higher than their use temperature . Firing is generally carried out in kilns.

The refractory company refractories are fired,
(i) to stabilize and strengthen their structures.
(ii) to remove water of dration.
(iii) to facilitate development of stable mineral to form the finished products.

Introduction and advantages of Chromite Sand

Chromite ore is also called chromite sand which is a kind of special sand for casting. Some natural spinel based mainly on chromite ore, then be crushed, grinded and filtered, thus filter the specified size chromite sand out which can be used as modeling sand.

The main content of chromite sand is Cr2O3. It is characterized with stable heating area, ......

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What is the Performance Analysis of insulation bricks

Acid-resistant ceramics can resist most media except hydrogen-arc acid, thermal alkali and thick alkali, and has better anti-corrosion effect in moist chlorasalt,hydrochloric acid etc. and any alkali under normal temperature.

1, the use of high temperature:
Up to 1750 degrees, good thermal stability. Reheating line rate of change is small, the use of more long-term.
2, optimizing the structure, reducing the weight of the furnace:
Now with a high-temperature materials are all heavy brick bulk density of 2.6-3.0g/cm, and insulation Magnesia Carbon Brick only 1.1 ~ 1.5g/cm, the same volume of one cubic meter, alumina hollow ball brick can reduce the weight of 1.1-1.9 tons .
3, saving materials:
Achieve the same temperature, such as the use of heavy bricks and insulation bricks price its price is quite, but also need considerable insulation China refractory material. If insulation Taphole Brick, saving per cubic meter of 1.1-1.9 tons of heavy usage brick, it can save 80% of the fire-resistant insulation materials.
4, save energy:
Thermal insulation characteristics of a good Ladle Magnesia Carbon Brick, low thermal conductivity, can play a very good insulation effect, reduce heat dissipation, improve thermal efficiency and thus serve the purpose of saving energy. Energy savings up to 30%.

Fire Clay Bricks can be used to make high temperature insulation, ultra-high temperature insulation filler, high temperature refractory lightweight aggregate concrete, high temperature castable. To reduce the weight of the furnace, the transformation of the structure, saving material, energy savings will be achieved remarkable results.

Henan Xinmi Changxing Refractory Material Co., Ltd.'s product portfolio covers shaped products such as refractory materials,refractory brick, refractory castable,refractory nozzle, ceramic fiber, slide gate, etc;