Chrome corundum brick is based on alumina - chromium oxide as the main raw material production of high-performance chrome corundum brick, with high refractoriness, strength, thermal shock stability, good resistance to erosion characteristics, the use of resistance to erosion, wear , Anti-structural flaking, has been in the metallurgical, glass, carbon black, petrochemical industry has made good use of results. Chrome corundum brick raw materials used by the alumina and chromium oxide according to a certain proportion of ratio, after high temperature melting synthesis of a solid solution. The use of special refractory production process made of refractory brick, can improve and improve the inherent quality of products to improve the product's high temperature performance.
1.  Fire resistance of chrome corundum brick
In the high-purity corundum material by adding Cr2O3, no matter how much added, not only will not reduce the material's fire resistance, but will make the material's fire resistance has improved.
2. The strength of chrome corundum brick
High-rigidity corundum brick at room temperature compressive strength is generally 70 ~ 100MPa, high-performance chrome corundum brick at room temperature compressive strength is generally> 150 MPa, its strength was significantly higher than the corundum brick. This is because the products in the firing process, between its particles and particles, between particles and fine powder, between the fine powder and fine powder are formed Al2O3- Cr2O3 solid solution, calcium solid solution like a bridge to the particles, fine powder connection together, is the strength of the material greatly improved.
3. Thermal shock stability
When the Cr2O3 content is 10% ~ 66%, the thermal shock stability of the material decreases with the increase of Cr2O3 content, that is, chrome corundum brick with low Cr2O3 content has better thermal shock stability than Cr2O3 content high chrome corundum brick. Our company produces high-performance chrome corundum brick Cr2O3 content between 12% to 20%, its stability than corundum brick has increased, especially by adding a small amount of phase change additives and produce AKZ-type chrome corundum brick, heat Better stability
4. Anti-slag erosion ability
From the figure we can see Cr2O3 in coal gasification slag and a variety of glass melt solubility than other oxide materials, the solubility is much smaller. Therefore, Cr2O3 or Cr2O3-containing refractories have good resistance to steel slag, colored smelting slag, coal gasification slag, oil and gasification slag and various glass melt dissolution capacity. Cr2O3 melt or Cr2O3 reaction with the slag to produce liquid viscosity than other low melt viscosity, which prevents the slag along the capillary pores to the internal penetration of the brick, to avoid the formation of metamorphic layer and produce structural flaking.

5. Application
In the steel industry, the use of chrome corundum brick material than corundum material to extend the service life of more than doubled, such as ladle breathable bricks; used in the non-ferrous smelting industry, chrome corundum brick wear resistance and erosion resistance is better than other brick.
In the petrochemical industry, large and medium-sized fertilizer plant gasification furnace due to long-term high temperature, high pressure, strong reducing atmosphere and air velocity, the lining of refractory material requirements higher. High-performance chrome corundum brick density, high strength, and anti-air erosion ability and wear resistance. The introduction of Cr2O3 in corundum brick changes the intrinsic quality of the product, resulting in a significant increase in slag resistance and penetration resistance of the brick. The use of gasifier can improve the service life of the gasifier.