2022 new chrome corundum brick

Product advantages: low porosity, high density, high strength, good high temperature wear resistance, good resistance to extreme cold and extreme heat, good slag resistance, and good durability.

product description

Chromium corundum refractory bricks are synthesized from pure Al2O3 and Cr2O3 as main raw materials. Compared with pure corundum bricks, it has better properties, such as refractoriness, softening deformation temperature under load, flexural strength, high temperature creep, high temperature volume stability Resistance and slag corrosion resistance.

Chrome corundum bricks are corundum refractory bricks containing Cr2O3. At high temperatures, Cr2O3 and Al2O3 form a continuous solid solution. Therefore, the high temperature performance of chromium corundum bricks is better than pure corundum bricks. The chromium corundum bricks used in the gasification furnace of the petrochemical industry should be low silicon, low iron, low alkali, high purity, but also have high density and strength. Chrome corundum bricks are widely used, and the content of Cr2O3 is mostly in the range of 9% to 15%.

chrome corundum bricks are also called high wear-resistant chromium corundum tapping channel bricks. It is a high-end product promoted in the market in recent years. It is synthesized from pure alumina Al2O3 and chromium oxide Cr2O3 as main raw materials. Compared with pure corundum bricks, it has better properties, such as refractoriness, load softening temperature, Flexural strength, high temperature creep, high temperature volume stability and slag corrosion resistance. Chrome corundum brick is a kind of high-grade refractory material, and its service life can reach 10 to 18 months after many rolling mill users.

Practice has shown that the application of high wear-resistant chromium corundum tapping channel bricks in the tapping channel of the rolling furnace for heating large-section billets, high friction per unit area and high output, not only can significantly extend the service life of the tapping channel and reduce furnace shutdown Time, increase production, reduce refractory consumption and maintenance costs, and the reduction in the number of rapid cooling and heating caused by the shutdown of the furnace for maintenance, so that the overall life of the furnace is improved, and obvious economic benefits can be achieved.

Physical and chemical indicators

project	High chrome oxide brick Cr-93	Medium chrome oxide brick Cr-86	Chrome Corundum Brick Cr-60	Chrome Corundum Brick Cr-30	Chrome Corundum Brick Cr-12
Cr2O3 %	≥93	≥86	≥60	≥30	≥12
Al2O3 %	—	—	≤38	≤68	≤80
Fe2O3 %	—	—	≤0.2	≤0.2	≤0.5
Apparent porosity %	≤17	≤17	≤14	≤16	≤18
Bulk density g/cm3	≥4.3	≥4.2	≥3.63	≥3.53	≥3.3
Compressive strength at room temperature MPa	≥100	≥100	≥130	≥130	≥120
Load softening start temperature ℃ 0.2MPa, 0.6%	≥1680	≥1670	≥1700	≥1700	≥1700
Change rate of reheating line% 1600℃×3h	±0.2	±0.2	±0.2	±0.2	±0.2
Application	High chromium bricks are mainly used in key parts of kilns such as coal chemical industry, chemical industry kilns, alkali-free glass fiber, garbage incinerators, etc.;
Application	Chrome corundum bricks are mainly used for the lining of carbon black furnaces, copper smelting furnaces, melting pools of glass furnaces, steel rolling heating furnace slides, and tapping platforms.