Corundum brick refers to the refractory brick with Al2O3 content than 90%, normal temperature compressive strength up to 340MPa, load softening temperature greater than 1700℃, hardness up to Morse grade 9. Corundum brick is made of high purity or pure raw materials, white color, accurate size, but also support customized refractory products. Corundum brick has good chemical stability, strong resistance to acid or alkaline slag, metal and glass liquid, oxidation atmosphere and reduction atmosphere at high temperature can receive good use effect.
The description of corundum brick
Corundum brick refers to alumina content more than 90%, with corundum as the main crystalline phase of refractory products. The raw material of corundum brick is a kind of solid solution synthesized by alumina and chromium oxide according to a certain proportion through high temperature melting. The internal quality and high temperature performance of refractory brick can be improved by using special refractory material production technology.
Corundum brick index
| Corundum Brick | C85 | C90 | C95 | C98 |
| Al2O3≥, % | 85 | 90 | 95 | 98 |
| Fe2O3≤, % | 0,5 | 0,8 | 0,4 | 0,6 |
| Open porosity, %, ≤ | 20 | 20 | 20 | 20 |
| Mass density ≥, g/cm3 | 2,8 | 3,0 | 3,05 | 3,1 |
| Refractoriness under load (0.2Mpa) ≥ ℃ | 1500 | 1700 | 1700 | >1700 |
| Additional linear shrinkage,%, at temperature, 1600℃*2h | – | – | – | ±0.1 |
Corundum brick production process
Corundum brick is divided into sintered corundum brick and fused corundum brick. Sintered corundum brick is a refractory brick made of alumina (or industrial alumina) as raw material, ground into pellets or bodies, and sintered at 1750~1950 ℃. The fused corundum brick is made of alumina or bauxite as raw material, which is fused by electric arc furnace in reducing atmosphere, separated from metal and other impurities, and then condensed.
Notes
The thermal shock stability is related to its structure. The dense products have good corrosion resistance, but the thermal shock stability is poor. Corundum brick is a dense product, so its thermal shock stability is relatively poor.
Corundum brick price
Corundum brick is generally divided into sintered corundum brick and fused corundum brick. The manufacturing process of corundum brick is different, and the price is also different. So when you ask different manufacturers to quote you, there will be great differences. Kerui Refractory recommends that you select appropriate corundum bricks according to the location of the kiln, which can improve the service life of your kiln and reduce your cost.
Corundum brick application
Corundum brick is mainly used for ironmaking blast furnace and blast furnace hot blast furnace, steel refining furnace outside the furnace, sliding water heater, glass furnace and petrochemical industrial furnace.
Corundum brick manufacturer
Kerui Refractory serves the global high-temperature industry. If you currently have a high-temperature equipment construction project and need high-quality corundum mullite bricks for masonry, Kerui Refractory Factory is ready to provide you with free professional refractory consulting services. Kerui Refractory is a reliable refractory manufacturer for customers, and also hopes to become your best partner in China.
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