Chrome corundum bricks
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Product Introduction
Chrome corundum brick is a corundum refractory product containing Cr2O3. At high temperature, Cr2O3 and Al2O3 form a continuous solid solution, so the high temperature performance of chrome corundum bricks is better than that of pure corundum bricks. Chrome corundum bricks are mainly used as the lining material for the lower part of the residue gasification furnace in the petrochemical industry, and can also be used as the material for sliding nozzles.
Chromium corundum brick has good high temperature resistance and slag corrosion resistance, excellent molten cinder erosion resistance, and its slag corrosion resistance is enhanced with the increase of Cr2O3 content. The physical and chemical properties of chromium corundum bricks (examples) are as follows: Al2O3 89.62%, Cr2O3 9.07%, SiO2 0.17%, Fe2O3 0.08%, K20+Na20 0.33%, bulk density
3.29g/cm3, apparent porosity 18%, compressive strength at room temperature 88.8MPa, reburning line change (1600 °C, 3h) -0.07%, load softening temperature greater than 1700 °C.
| Projects | Physical and chemical indicators | ||||
| GGZ-5 | GGZ-12 | GGZ-20 | GGZ-30 | ||
| （Cr2O3）/% | ≤ | 5 | 12 | 20 | 30 |
| （Cr2O3+Al2O3）/% | ≥ | 93 | 93 | 93 | 93 |
| （Fe2O3）/% | ≥ | 0.3 | 0.3 | 0.3 | 0.3 |
| Apparent porosity/% | ≤ | 18 | 18 | 18 | 18 |
| Bulk density/(g/cm3) | ≥ | 3.10 | 3.20 | 3.40 | 3.50 |
| Compressive strength at room temperature/Mpa | ≥ | 100 | 100 | 100 | 100 |
Key words:
Chrome corundum bricks
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