The alumina chrome bricks with very good erosion resistance performance, very good thermal shock resistance performance, can meet high requirements of various high temperature working condition.
The main mineral composition of aluminum chrome brick is α-Al2O3-Cr2O3 solid solution. The minor mineral composition is a small amount of compound spinel (or not containing compound spinel), chromium oxide content of 1% ~ 30% refractory brick. There are two kinds of cast chrome corundum bricks and sintered chrome corundum bricks. In general, chrome corundum brick refers to sintered chrome corundum brick.
At present, the application of aluminum chrome brick has been more widely used, one is made of metal chromium slag as the main raw material of chromium corundum brick, the product is widely used in zinc smelting furnace, volatile kiln, chromium corundum brick has excellent thermal vibration stability and high temperature creep performance, and meet the requirements of national circular economy.
The chrome corundum brick products I produce are made of corundum and fused chromium oxide as the main raw materials, with micro powder and other additives, after mixing, forming, drying, and firing at high temperature in shuttle kiln. Products with wear resistance, heat shock, acid and alkali erosion and other characteristics. High chromium brick (Cr2O3≥90%) is mainly used in coal chemical industry, chemical industry kiln, alkali free glass fiber kiln, garbage incinerator and other key parts of kiln
◆ Lining of carbon black furnace
◆ Lining of copper smelting furnace
◆ Glass furnace melting pool
◆ Steel rolling furnace slide
◆ Steel plant platform
◆ Super good performance
◆ Manufacturing with very high quality raw material
| Item | High chromium oxide brick | Medium chrome oxide brick | Chrome corundum brick | Chrome corundum brick | Chrome corundum brick |
| Cr2O3 % | ≥93 | ≥86 | ≥60 | ≥30 | ≥12 |
| Al2O3 % | — | — | ≤38 | ≤68 | ≤80 |
| Fe2O3 % | — | — | ≤0.2 | ≤0.2 | ≤0.5 |
| Appearance porosity % | ≤17 | ≤17 | ≤14 | ≤16 | ≤18 |
| Bulk density g/cm3 | ≥4.3 | ≥4.2 | ≥3.63 | ≥3.53 | ≥3.3 |
| Cold crushing strength MPa | ≥100 | ≥100 | ≥130 | ≥130 | ≥120 |
| Refractoriness under load℃（0.2Mpa,0.6%） | ≥1680 | ≥1670 | ≥1700 | ≥1700 | ≥1700 |
| Linear change on reheating % | ±0.2 | ±0.2 | ±0.2 | ±0.2 | ±0.2 |
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