refractory material is a refractory degree of not less than 1580 degrees, a better thermal shock and chemical erosion, low thermal conductivity and low expansion coefficient of inorganic non-metallic materials. Its widely used in iron and steel, glass, cement and other industries. Refractories have their own characteristics have been proven advantages, but its shortcomings and deficiencies are also different. The development of refractories on the whole in the new products, new processes, such as the direction of development trends.
Refractory material firebrick refractory is mainly made of raw materials such as bauxite, dolomite, silica, magnesite, steel fiber and so on. The development of refractories in the national industrial production applications have a pivotal position.
Refractory materials basic refractories according to the product shape and compact degree, a casting method, melt blowing method, sintering method. Sintering method is part of the raw material pre-firing clinker, cracking and screening, and then a certain percentage of mixing with the raw materials, through molding, drying and firing. The purpose of raw materials is to burn the moisture, organic debris and gas burned. Reduce the sintering products shrink to ensure the accuracy of finished size. In order to homogenize the ingredients and particles of the various raw materials and clinker, kneading is carried out while the binder is added to enhance the bonding strength.
Casting method is to mix raw materials through the process of mixing and fine grinding, in high temperature baking, direct casting, cooling crystallization, annealing into products.
The melt blow method is a method in which the ingredients are melted and then sprayed with high pressure air or superheated steam to disperse them into steel fibers or hollow spheres.
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.
显示标签为“Refractories used for steelmaking”的博文。显示所有博文
显示标签为“Refractories used for steelmaking”的博文。显示所有博文
2016年11月4日星期五
2016年11月2日星期三
Slide Gate Mechanism---Changxing Refractory material
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| Slide Gate Mechanism---Changxing Refractory material |
Introduction:
Ladle slide gate mechanism, also called ladle slide gate system, slide gate assembly, sliding gate machenism. Ladle slide gate mechanism uses nodular cast iron as raw material. The sealing height is only 110mm. The fan-shaped slide gate plate is equipped with two slide plate blocks. The moving fan-shaped case handle can make one of the slide plate cast hole in working, and make another one moving to the other space of the equipment. At the same time, the moving out slide block can be changed.
Advantages:
1. Slip sheet is force uniform have good stability.
2. Sliding gate lateral clearance self-regulating sensitivity is high.
3. Increase the slip sheet's freedom, bottom slide can vertical-tuning.
4. Have double-sided tight pin; the gab of hinge lateral can be adjusted.
Application:
The slide blocks thicknesses are heightened by this equipment which can be used as rapid nozzle-change mechanism. While add immerse nozzle at the bottom of slide block, the ladle stopper can be replaced and protect the casting.
Content source:
http://www.yilongrefractory.com/ProductServletOne?id1=4&id=54
E-mail：sales8@chinaelong.com
2016年11月1日星期二
Currently the most commonly used method of producing refractory balls
Machine pressure forming method is currently the most used in the production of refractories ball forming method. The method uses a pressure ball machine and a steel mold to press the prepared refractory material into a sphere. Because of the general machine pressure forming refers to the water content of 4% to 9% of the semi-dry material forming method, which is also called semi-dry forming. The method commonly used equipment friction brick press, lever press and hydraulic press and so on.
Machine pressure forming process is essentially a ball material within the particle-intensive and air discharge, the formation of dense sphere process. The ball-forming fire-resistant ball has the advantages of high density, high strength, small drying shrinkage and small shrinkage, easy control of fire-resistant ball size, so this method is the main part in refractory firebrick ball production. In order to obtain a dense sphere during press forming, sufficient pressure must be applied to the pellet. The size of the pressure should be able to overcome the internal friction between the pellet material, to overcome the external friction between the pellet and the mold wall to overcome the insulating castable moisture, particles and fill in the mold caused by uneven pressure distribution Uniformity.
The ratio between the three depends on the ball material dispersion, particle composition, ball material moisture, the size and shape of the sphere. Although the relationship between pressure and the densification of the sphere can be calculated by a number of theoretical formulas, such as the variation of the porosity of the sphere with pressure in logarithmic relation, the experimental method is usually used to determine the pressure per unit area of the sphere, Brick machine should have the total pressure.
Mechanical forming of the ball material requirements in addition to water should have a certain range of fluctuation, its particle size also has certain requirements, such as should have a reasonable grain size ratio, bulk density as large as possible. General critical particle size of 3 ~ 5mm, less than 0.088mm of fine powder content should be 35% to 45% range. The most common defects in machine-formed fire-resistant spheres are the crack and layer density. Spallation is the formation of pressure in the vertical direction of the pressurized layer of cracks. Ball material moisture is too high, too much powder, too little bonding agent and pressure will lead to the production of spall.
Therefore, in the production of these parameters must be controlled. Layer density phenomenon that the shape of the fireball after the density along the pressure direction of the inverter. By the above one-way pressurized insulating refractory cement ball is generally dense under the sparse, the same level is dense in the outer sparse. This is due to the friction between the pellet material and the ball material and the friction between the mold wall caused by the pressure decrease. Double-sided pressure and the wall in the mold coated with lubricating oil to reduce the external friction of the method can reduce this phenomenon and reduce the porosity of the sphere.
Selection of molding equipment should be based on the quality requirements of refractory balls, size and production volume for comprehensive consideration. General refractory ball with a simple fireball or shape, quantity, quality requirements of the general products, the choice of production efficiency of the high pressure ball machine; high quality requirements of the fireball can be nominal pressure not less than 2000K N friction Pressure ball machine.
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.
Machine pressure forming process is essentially a ball material within the particle-intensive and air discharge, the formation of dense sphere process. The ball-forming fire-resistant ball has the advantages of high density, high strength, small drying shrinkage and small shrinkage, easy control of fire-resistant ball size, so this method is the main part in refractory firebrick ball production. In order to obtain a dense sphere during press forming, sufficient pressure must be applied to the pellet. The size of the pressure should be able to overcome the internal friction between the pellet material, to overcome the external friction between the pellet and the mold wall to overcome the insulating castable moisture, particles and fill in the mold caused by uneven pressure distribution Uniformity.
The ratio between the three depends on the ball material dispersion, particle composition, ball material moisture, the size and shape of the sphere. Although the relationship between pressure and the densification of the sphere can be calculated by a number of theoretical formulas, such as the variation of the porosity of the sphere with pressure in logarithmic relation, the experimental method is usually used to determine the pressure per unit area of the sphere, Brick machine should have the total pressure.
Mechanical forming of the ball material requirements in addition to water should have a certain range of fluctuation, its particle size also has certain requirements, such as should have a reasonable grain size ratio, bulk density as large as possible. General critical particle size of 3 ~ 5mm, less than 0.088mm of fine powder content should be 35% to 45% range. The most common defects in machine-formed fire-resistant spheres are the crack and layer density. Spallation is the formation of pressure in the vertical direction of the pressurized layer of cracks. Ball material moisture is too high, too much powder, too little bonding agent and pressure will lead to the production of spall.
Therefore, in the production of these parameters must be controlled. Layer density phenomenon that the shape of the fireball after the density along the pressure direction of the inverter. By the above one-way pressurized insulating refractory cement ball is generally dense under the sparse, the same level is dense in the outer sparse. This is due to the friction between the pellet material and the ball material and the friction between the mold wall caused by the pressure decrease. Double-sided pressure and the wall in the mold coated with lubricating oil to reduce the external friction of the method can reduce this phenomenon and reduce the porosity of the sphere.
Selection of molding equipment should be based on the quality requirements of refractory balls, size and production volume for comprehensive consideration. General refractory ball with a simple fireball or shape, quantity, quality requirements of the general products, the choice of production efficiency of the high pressure ball machine; high quality requirements of the fireball can be nominal pressure not less than 2000K N friction Pressure ball machine.
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10月13日星期四
Effect of Refractories on Impurity of Molten Steel
Improve the quality of steel is an important indicator of lower inclusions in steel to improve the cleanliness of steel. With the improvement of cleanliness requirements of molten steel, people pay more attention to high temperature steelmaking refractory steel impurities in the impact. Steel in the various non-metallic inclusions mainly from refractory material, in the whole steelmaking alumina brick process, molten steel and refractory material firebrick refractory always keep in contact, therefore, between the two phases not only produce surface reaction can also produce erosion. Some of the inclusions in the steel in any state (in the grain boundary segregation, inclusions or precipitates, and invasive solid solution, etc.), although the trace, the organization of steel and material also has a great impact.
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