Brief Introduction
Chromium corundum brick is also called high wear-resistant chrome corundum tapping brick. Using α-Al2O3 as raw material, appropriate amount of chromia powder and chrome corundum clinker fine powder are added, and then they are shaped and burned at high temperature. It can also be prepared by mud casting method. Alpha-Al2O3 powder and chromia powder are evenly mixed. Thickener is made by adding glue and organic binder. At the same time, part of chrome corundum clinker is added, and bricks are made by grouting method. Then fired. The main mineral composition is α-Al2O3-Cr2O3 solid solution. Minor minerals consist of a small amount of composite spinel (or no composite spinel), refractory bricks with 1% to 30% chromium oxide content.
Technical Datas
| Fused Chrome Corundum Brick | G92-Cr | |
| Chemical Composition（%） |
Al2O3 | ≥92 |
| SiO2 | ≤1.0 | |
| Fe2O3 | ≤0.3 | |
| CaO | ≤1.2 | |
| Na2O | – | |
| ZrO2 | ≥3 | |
| Cr2O3 | ≥3 | |
| Apparent Porosity (%) | ≤15 | |
| Bulk density（g/cm3） | ≥3.25 | |
| Pressure strength（Mpa） | ≥180 | |
| High temperature flexural strength（1250℃ Mpa) | ≥9.5 | |
| Refractoriness（℃） | ≥1900 | |
| Load softening temperature（0.2Mpa T0.6 ℃） | ≥1680 | |
| Burning line rate of change % （1500℃×2h) | ≤±1.2 | |
Application
Chromium corundum bricks are mainly used as the inner lining of petrochemical industrial slag oil gasifiers, steel taps of heating furnaces, slide rails and tapping platforms of steel rolling furnaces, and grooves and other industrial furnaces. It can be used as lining of glass kiln, drawing glass flow hole cover plate brick and used for hot metal pretreatment device, waste incinerator, coal water slurry pressure gasification furnace back lining.