Chrome Corundum Bricks Description
Chrome corundum bricks are Cr2O3 containing corundum bricks. At high temperature, Cr2O3 and Al2O3 will form continuous solid solution, so chrome corundum firebricks have better high temperature performance than pure corundum firebricks. Most often used chrome corundum bricks contains 9%~15% Cr2O3, principle mineral composition is α-Al2O3-Cr2O3 solid solution, subordinate mineral composition is small amount of composite spinel. Cr2O3 corundum bricks can be divided into fused cast chrome corundum bricks and burned chrome corundum bricks, generally speaking, chrome corundum bricks are sintered chrome corundum bricks. Chrome corundum bricks’ raw materials are α-Al2O3, Cr2O3 powder and chrome corundum clinker fine powder. Usually, sintered chrome corundum bricks’ Cr2O3 content is lower than fused cast chrome corundum.
Chrome Corundum Bricks Characteristics
- High density, high strength.
- Better abrasion resistance and air current fluxing resistance.
- Excellent molten slag corrosion resistance and permeation resistance.
- Good thermal shock resistance and high temperature volume stablitiy.
- High refractoriness under load, low creep rate.
Chrome Corundum Bricks Physiochemical Index
| Item | GGZ-60 | GGZ-30 | GGZ-12 |
| Cr2O3 % | ≥60 | ≥30 | ≥12 |
| Al2O3 % | ≤38 | ≤68 | ≤80 |
| Fe2O3 % | ≤0.2 | ≤0.2 | ≤0.5 |
| Apparent porosity % | ≤14 | ≤16 | ≤18 |
| Bulk density g/cm3 | ≥3.63 | ≥3.53 | ≥3.3 |
| Cold Crushing Strength Mpa | ≥130 | ≥130 | ≥120 |
| Refractoriness under load (0.2MPa,0.6%) ℃ | ≥1700 | ≥1700 | ≥1700 |
| Reheating linear change rate(1600℃×3h) % | ±0.2 | ±0.2 | ±0.2 |
Chrome Corundum Bricks Application
Chrome corundum bricks have a wide range of applications. In steel industry, chrome corundum bricks’ service life is one time longer than corundum bricks, for instance, steel ladle purging plug bricks. In nonferrous metals smelting industry, chrome corundum bricks’ abrasion resistance and corrosion resistance is significantly better than other bricks. In carbon black industry, chrome corundum are widely used at carbon black reaction furnaces and have better service life than corundum bricks. In petrochemical industry, middle and large scale fertilizer factory gasifying furnace ling exposes to high temperature, high pressure and strong reduction atmosphere condition, thermal shock and corrosion damage are severe, chrome corundum brick is a good choice.
one type of chrome corundum bricks which adopts metal chromium slag as main material, are widely used in zinc smelting electric furnace, volatilizing kilns. Another type of chrome corundum bricks which is also called alumina chrome spinel bricks are widely used in copper smelting, is a good replacement of magnesia chrome bricks.
RS Chrome Corundum Bricks Supplier
As a Chrome Corundum Bricks Supplier, RS with large scale factory and advanced production equipment. RS can not only provide you the best quality refractory bricks, but also can service you the refractory lining construction. The castable refractory for the CFB Boiler with high performance of wear-resistance. If you have any need of refractory, such as Chrome Corundum Bricks, Please contact us. We will give you back ASAP!
