Views: 91 Author: SEPPE Publish Time: 2020-12-15 Origin: SEPPE Technologies
Brown corundum is an advanced synthetic raw material of alumina series. It is made of high-quality bauxite as the main raw material, adding coke, iron filings and other auxiliary materials, and smelting and purifying at high temperature in an electric arc furnace.
Low-carbon brown corundum undergoes reprocessing in front of the furnace and a special process to reduce the content of residual carbon in the brown corundum, so that the product does not pulverize, burst, and has high toughness during use. The main chemical composition is alumina, and the melting point of brown corundum is 2080 degrees, high temperature resistance, alumina is a neutral material, acid and alkali corrosion resistance.
Brown corundum is generally used in refractories as corundum castables, corundum bricks, prefabricated parts, breathable bricks, ladle bricks, and magnesia aluminum carbon bricks. Its advantages are high refractoriness, wear resistance, erosion resistance, erosion resistance, high bulk density and high alumina content.
Castables is also called refractory castables. Refractory castables is a kind of granular and powdery material made by adding refractory materials to a binder in a certain proportion. The castables is a kind of unshaped refractory material that has high fluidity and is made by pouring.Compared with other unshaped refractory materials, the castables has higher binder and moisture content, and the castables has better fluidity. Therefore, the castables has a wider range of applications. The castables can be selected according to the conditions of use. It can be directly poured into a lining body for use, and can also be used as a prefabricated block.
The quality of the product should be carefully inspected when purchasing. In addition to testing whether the alumina content reaches 95%, the carbon content should also be tested.Excessive carbon content will result in aluminum carbide, which will hydrate when exposed to water, which will cause the product to crack and decrease the strength, and of course the fire resistance will be reduced.