High Chrome brick is made of corundum and fused chromium oxide as the main raw materials, together with additives such as fine powder, which are mixing, forming, drying and firing at a high temperature in the shuttle kilns. It has the characteristics of wear resistance, thermal shock resistance and acid corrosion resistance, which are mainly used in coal chemical industry, chemical industry kiln, alkali-free glass fiber kiln, garbage incinerator and so on. If you are looking for high quality high chrome brick at a cheap price with the best quality, Contact us for free quotation right now!
Introduction About High Chrome Brick
High chrome brick is an alkaline refractory brick with periclase and magnesia chrome spinel as the main crystalline phase. It is made of chromium oxide and aluminum oxide as the main raw materials, and is sintered under the high temperature, wherein the chromium oxide content is not less than 75%, and the chromium oxide, aluminum oxide and chromium oxide content are not less than 98%.
High Chrome Brick Features
High chrome brick is mainly composed of Cr2O3, zirconia and alumina fine powder. Therefore, the properties of high chrome bricks are closely relevant to the features of these materials. In a word, the characteristics of high chrome bricks are mainly reflected in the following aspects:
Excellent Slag Resistance
Cr2O3 has excellent slag corrosion resistance, which is mainly due to the following points:
- The solubility of Cr2O3in coal slag is very low, thus ensuring the integrity of the material.
- Most slags have poor wettability to Cr2O3materials, which delays the dissolution of Cr2O3in slag.
- After the Cr2O3material is dissolved in the slag, the viscosity of the slag is increased, and even a uniform protective layer can be formed on the surface of the material to block the pores of the material and inhibit the slag penetration.
Excellent High Temperature Performance
The main components of high chrome bricks areCr2O3, Al2O3 and ZrO2. Their melting points are about 2400℃, 2050℃ and 2700℃ respectively. After 1700t high temperature treatment, Cr2O3 and Al2O3 form a well-crystallized and continuous aluminum chromium solid solution. Therefore, the high chromium refractory material has a good high temperature strength.
Excellent anti-scouring performance
The formation of aluminum-chromium solid solution and the combustion-promoting effect of ZiO2 make the high chrome material have lower apparent porosity and higher compressive strength (up to 150 MPa or more than 200 MPa), so high chrome refractories have good anti-scour performance.
Good Thermal Shock Resistance and Thermal Peeling Resistance
Due to the phase transformation and toughening effect of ZiO2, the thermal shock resistance and thermal peeling resistance of the high chromium refractory material are improved.
High Chrome Brick Applications
High chrome bricks are widely used in the refractory layer of high temperature parts of carbon black reactors, refractory layers of sulfur furnaces in petrochemical industry, pressurized coal gasification furnaces, burner bricks of various heating furnaces, flue slabs bricks and high temperature parts of high temperature furnaces in the other industry.
At present, high chrome brick has a wider applications. One is made of metal chromium slag as the main raw material, which is widely used in zinc smelting electric furnaces and volatile kiln, while chrome corundum bricks have good performance in thermal shock stability and high temperature creep.
High Chrome Brick Specification
|Cold Crushing Strength(MPa)||300||130-250||≥100||≥100||≥100||≥100||120|
|Refractoriness Under Load(℃)||≥1700||≥1700||≥1680||≥1680||≥1680||≥1670||≥1670|
High Chrome Brick Supplier
High chrome brick produced in RS refractory company uses chromium oxide and alumina as the main raw materials, or introduces a small amount of zirconia, and is sintered at high temperature. The chromium oxide content is not less than 75%, and the chromium oxide, aluminum oxide and zirconium oxide content in high chrome bricks is not less than 98%. Generally, high chrome bricks are chrome oxide products produced from industrial pure chrome green, which are mainly used in the key parts of coal-fired chemical, chemical industrial furnaces, alkali-free glass fiber kiln, garbage incinerators, gasifiers, etc. So if you have any needs or requirements, please Contact us for more information.