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Chrome Corundum Bricks
Brand: HongTai Refractory
Category: Corundum Bricks
AL2O3: 60-85%
Bulk density: 2.9-3.35g/cm³
Payment Terms: T/T, Credit Cardse, E-Checking, Alibaba Trade Assurance
Product Information
Chromium corundum bricks are primarily composed of the mineral α-Al2O3-Cr2O3 solid solution. Minor mineral components include a small amount of composite spinel (or without composite spinel) and refractory bricks with chromium oxide content ranging from 1% to 30%.
There are two main types: fused chromium corundum bricks and sintered chromium corundum bricks. In general, when referring to chromium corundum bricks, it typically means sintered chromium corundum bricks.
Using α-Al2O3 as the raw material, a suitable amount of chromium oxide powder and finely ground chromium corundum clinker is added. After shaping, it is fired at high temperatures. The chromium oxide content in sintered chromium corundum bricks is generally lower than that in fused chromium corundum bricks.
They can also be prepared using a slurry casting method, where α-Al2O3 powder and chromium oxide powder are uniformly mixed, along with binders and organic bonding agents to create a thick slurry. Part of the chromium corundum clinker is added, and the bricks are formed by injection casting before being fired.
These bricks are suitable for use as linings in glass furnaces, covers for molten glass flow holes in drawing glass production, and for iron ladle pre-treatment devices, waste incinerators, and coal-water slurry pressurized gasification furnace linings, among other applications.
Currently, chromium corundum bricks have found broader applications. One variety is produced mainly from metallic chromium slag, and these chromium corundum bricks are widely used in zinc smelting electric furnaces and rotary kilns.
They exhibit excellent thermal shock resistance and high-temperature creep performance while meeting the requirements of the national circular economy.
ltem | 15 Chrome-Corundum Brick | 10 Chrome-Corundum Brick | 5 Chrome-Corundum Brick | Wear Resistance Skid Rail | Zr-Cr-corundum Brick |
Cr2O3, % | ≥15 | ≥10 | ≥5 | ≥5 | ≥8 |
AL2O3, % | ≥75 | ≥80 | ≥85 | ≥85 | ≥60 |
ZrO2, % | ≥15 | ||||
Apparent porosity, % | ≤18 | ≤18 | ≤18 | ≤16 | ≤18 |
Bulk density, g/cm³ | ≥3.35 | ≥3.3 | ≥3.2 | ≥3.2 | ≥2.9 |
Cold crushing strength, MPa | ≥120 | ≥120 | ≥120 | ≥130 | ≥90 |
Refractorines under load, 0.2MPa,0.6% | ≥1700 | ≥1700 | ≥1700 | ≥1700 | ≥1700 |
- High refractoriness
- Excellent thermal stability
- Superior chemical resistance
- High mechanical strength
- Good thermal shock resistance
- High abrasion resistance
- Low porosity
Application | Summary |
---|---|
Glass Industry | Glass melting furnaces and regenerators |
Iron and Steel Industry | Steel ladles, tundishes, and electric arc furnaces |
Petrochemical Industry | Cracking furnaces, reforming furnaces, and ethylene pyrolysis furnaces |
Ceramics and Porcelain | Tunnel kilns and shuttle kilns for firing |
Non-Ferrous Metal Industry | Melting and holding furnaces for aluminum, copper, and other metals |
Cement Industry | Rotary kilns, preheaters, and coolers |
Incineration Plants | Waste incineration plants for high temperatures and corrosive environments |