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Chrome corundum brick
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Product Introduction
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Chrome corundum brick has excellent fire resistance, its fire resistance and load softening temperature are greater than 1700 degrees C. This is because Al2O3 and Cr2O3 can form a continuous solid solution without eutectic, thereby improving the refractory performance of the material.
The strength of chrome corundum brick is obviously higher than that of corundum brick, and its normal temperature compressive strength is generally greater than 100MPa. This is because during the firing process, a Al2O3-Cr2O3 solid solution is formed between particles and particles, between particles and fine powder, and between fine powder and fine powder, which connects the particles and fine powder like a bridge, thereby greatly improving the strength of the material.
The thermal shock stability of chrome corundum brick decreases with the increase of Cr2O3 content. However, by adding a small amount of additives that cause phase change, chrome corundum bricks with better thermal shock stability can be produced. When Cr2O3 is added to corundum, when the Cr2O3 content is 10%-66%, the thermal shock stability of the material decreases with the increase of Cr2O3 content, but the Cr2O3 content of high-performance chromium corundum brick is 12%-20%, and its thermal shock stability is improved compared with corundum brick.
Resistance to slag erosion: chrome corundum brick in the slag (SiO2-CaO system) and a variety of glass melt solubility than other oxide material solubility is much smaller. Therefore, the refractory material containing Cr2O3 has good resistance to steel slag, non-ferrous smelting slag, chemical slag, oil and gas chemical slag and various glass melt corrosion ability. The viscosity of the liquid phase generated by the reaction of Cr2O3 melt or Cr2O3 with slag is higher than that of other low melts, which prevents the slag from penetrating into the brick body along the capillary pores and avoids the phenomenon of structural spalling.
Application areas: Chrome corundum bricks are mainly used in the flue and rising parts of glass fiber tank kilns and the parts with high erosion of colored (green) glass. Contact glass parts such as pool wall, rising channel and channel of adiabatic glass wool and rock wool fiber melting furnace; The discharge port of ceramic frit glaze kiln; It can also be used in metallurgical molten pool and rotary furnace. Zinc oxide melting furnace; Waste incinerator.
Chrome corundum brick physical and chemical indicators:
Product Index | Chrome Corundum AC-10 | Chrome Corundum AC-15 | Chrome Corundum AC-30 | Chrome Corundum AC-50 | Chrome Corundum AC-60 |
Cr203(%) | ≥ 10 | ≥15 | ≥30 | ≥50 | ≥60 |
Zr02(%) | ≥ 5 | ≥ 5 | ≥ 3.5 | ≥ 5 | ≥ 5 |
Al203(%) | 84±1 | 77±1 | 65±1 | 44±1 | 34±1 |
Percent Porosity (%) | ≤ 17 | ≤18 | ≤18 | ≤18 | ≤18 |
Density (g/cm3) | ≥ 3.30 | ≥ 3.40 | ≥ 3.45 | ≥ 3.55 | ≥ 3.65 |
Cold Pressing Strength (Mpa) | >100 | >100 | >100 | >100 | >100 |
0.2Mpa Load Softening Temperature 0.6 (℃) | >1700 | >1700 | >1700 >1700 | >1700 | |
Chrome corundum brick is a remarkable refractory material with outstanding properties.
These bricks are made from high - quality raw materials. The main component, corundum, endows the brick with high hardness and excellent wear - resistance. The addition of chrome further enhances its performance. It has a high melting point, which enables it to withstand extremely high temperatures without significant deformation. This makes it suitable for applications in high - temperature furnaces, kilns, and reactors.
The quality Chrome Corundum Brick also shows good thermal shock resistance. In environments where there are rapid temperature changes, such as during the heating and cooling cycles in industrial processes, it can maintain its integrity and functionality.
In terms of structure, it has a dense microstructure. This not only contributes to its strength but also helps in reducing porosity, thereby preventing the penetration of molten substances or gases.
Moreover, these bricks have a long service life. Their durability means that they require less frequent replacement, reducing maintenance costs and downtime in industrial operations. They are widely used in metallurgical, ceramic, and glass industries, where high - temperature resistance and reliability are crucial requirements for refractory materials.
Keywords:
Chrome corundum brick
customized Zirconium Corundum Brick
Kiln Display
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