High chrome brick is a kind of refractory brick with chromium oxide as the main raw material. It has the characteristics of high refractoriness, strong corrosion resistance and strong oxidation resistance. Kerui Refractory provides high-quality customized chrome bricks with excellent production.
- Cr2O3: ≥75-95%;
- Cr2O3+Al2O3+ZrO2: ≥98%;
- SiO2: ≤0.2%;
- Bulk Density: 3.90-4.25g/cm³;
- Cold Crushing Strength: 120MPa;
- Apparent Porosity: 16-18%;
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High Working Temperature
Good Thermal Shock Resistance
Great Wear Resistance
Good Corrosion Resistance
What is High Chrome Brick?
High-chrome bricks are refractory products made from high-temperature firing of chromium oxide and alumina as the main raw materials. The chromium oxide content is as high as 95%. This type of brick also contains a small amount of zirconia. Chromium oxide and zirconia have very high melting points. Therefore, high-chrome bricks have high refractoriness and strong resistance to slag erosion.
Parameters of Kerui High Chrome Brick
| Item | GGZ-75 | GGZ-85 | GGZ-90 | GGZ-95 | |
|---|---|---|---|---|---|
| Cr2O3, % | ≥ | 75 | 85 | 90 | 95 |
| Cr2O3+Al2O3+ZrO2, % | ≥ | 98 | 98 | 98 | 98 |
| SiO2, % | ≤ | 0.2 | 0.2 | 0.2 | 0.2 |
| Fe2O3, % | ≥ | 0.3 | 0.3 | 0.3 | 0.3 |
| K2O+Na2O, % | ≥ | 0.2 | 0.2 | 0.2 | 0.2 |
| Bulk Density, g/cm³ | ≥ | 3.9 | 4.2 | 4.22 | 4.25 |
| Apparent Porosity, % | ≤ | 18 | 18 | 16 | 16 |
| Cold Crushing Strength, MPa | ≥ | 120 | 120 | 120 | 120 |
Advantages of Kerui High Chrome Brick
- Strong Resistance To Acid And Alkali Corrosion:
Chromium oxide does not react with acidic or alkaline chemicals. Therefore, it maintains a stable structure in high-temperature corrosive environments. It has high refractoriness. - High Chromium Content:
Chromium oxide is one of the most refractory oxides. Its melting point is as high as 2275 degrees Celsius. - Strong Thermal Shock Resistance:
The thermal expansion coefficient of high-chrome bricks is low. At high temperatures, it can maintain a stable structure and performance. The thermal shock resistance of high-chrome bricks is more than 6 times higher. When high-chrome bricks are heated to 1100℃ and cooled with water, they can withstand rapid changes in temperature without cracking. - Mechanical Strength:
High-chrome bricks have high high-temperature strength, strong wear resistance, and high room temperature compressive strength. It can withstand large mechanical loads.
Applications of Kerui High Chrome Brick
- Steel Industry:
It is used in metallurgical furnaces, electric furnaces, open hearth furnaces with the most severe slag corrosion location, for example, the AOD furnace air eye area of the external refining device, RH furnace vacuum chamber lower groove and impregnation tube, VOD slag Line, etc. - Non-Ferrous Metals:
This refractory block is used for non ferrous metallurgical (copper, lead, tin, nickel, etc.) , like converter air outlet area, flash furnace reaction tower, sedimentation tank, anode slag line position, alkaline refractory material kiln high-temperature zone, etc. - Building Materials Industry:
It is suitable for large-scale gasification furnaces of coal water slurry, large-scale glass fiber furnaces, and so on. - Chemical Industry: High-chrome bricks are used in various high-temperature chemical reactors, including those for ammonia synthesis, synthetic rubber production, coal chemical processing, and other chemical processes.
They are primarily used in the ammonia synthesis towers, heat exchangers, pipelines in ammonia synthesis plants, reactors, separators, and pipelines in synthetic rubber plants, and so on. - Power Industry:
High-chrome bricks are used in waste incineration furnaces and other high-temperature reactors in the power industry.