Refractory Grade Bauxite
Application Industry: Refractory Raw Materials and High Alumina Refractory Manufacturing
Application Equipment: High Alumina Brick, High Alumina Castable, Mullite Brick, Andalusite Brick, Brown Fused Alumina, and Refractory Cement Production
Size: Custom refractory grade bauxite lump, granular, and powder sizes per high alumina refractory manufacturing requirement (free engineering on request)
Products Overview
Our Refractory Grade Bauxite is a high-performance refractory raw material engineered for high alumina brick, high alumina castable, mullite brick, andalusite brick, and brown fused alumina production. Also known as calcined bauxite or refractory bauxite, this product is manufactured by Zhengzhou caihua from natural bauxite ore through high temperature calcination process to drive off chemically combined water and convert the ore to a stable, dense, and high alumina aggregate. The product family is the most important high alumina raw material for refractory manufacturing, featuring high alumina purity, low iron content, high bulk density, low porosity, and high temperature stability.
The Refractory Grade Bauxite product family is offered in five engineering-proven chemistry grades per customer specifications. The RK70 grade features Al2O3 content minimum 70 percent, Fe2O3 content maximum 2 percent, CaO+MgO content maximum 0.6 percent, K2O+Na2O content maximum 0.6 percent, Bulk Density 2.95-3 g/cm3, and Water Absorption maximum 5 percent for general high alumina refractory manufacturing service. The RK75 grade features Al2O3 content minimum 75 percent, Fe2O3 content maximum 2 percent, CaO+MgO content maximum 0.6 percent, K2O+Na2O content maximum 0.6 percent, Bulk Density 2.95-3 g/cm3, and Water Absorption maximum 5 percent for general high alumina refractory manufacturing service. The RK80 grade features Al2O3 content minimum 80 percent, Fe2O3 content maximum 2 percent, TiO2 content maximum 4 percent, CaO+MgO content maximum 0.5 percent, K2O+Na2O content maximum 0.5 percent, Bulk Density 3.1-3.15 g/cm3, and Water Absorption maximum 5 percent for standard high alumina refractory manufacturing service. The RK85 grade features Al2O3 content minimum 85 percent, Fe2O3 content maximum 1.8 percent, TiO2 content maximum 4 percent, CaO+MgO content maximum 0.4 percent, K2O+Na2O content maximum 0.4 percent, Bulk Density 3.2-3.25 g/cm3, and Water Absorption maximum 3 percent for higher-demand high alumina refractory manufacturing service. The RK87 grade features Al2O3 content minimum 87 percent, Fe2O3 content maximum 1.5 percent, TiO2 content maximum 4 percent, CaO+MgO content maximum 0.4 percent, K2O+Na2O content maximum 0.4 percent, Bulk Density 3.3-3.35 g/cm3, and Water Absorption maximum 3 percent for premium high alumina refractory manufacturing service.
Sourced from our Xinmi City, Zhengzhou, Henan, China facility, each Refractory Grade Bauxite grade is engineered to ASTM, GB/T, and ISO refractory raw material standards. Available bauxite aggregate sizes include 0-0.3mm, 0-0.5mm, 0-1mm, 1-3mm, 3-5mm, 5-8mm. Available bauxite powder sizes include 100 mesh, 200 mesh, 325 mesh per customer specifications. For an overview of the broader catalogue, see the Refractory Raw Materials category, or contact our technical sales team for a free consultation against your high alumina refractory manufacturing requirement.
Product Features
Features:
- Manufactured by Zhengzhou caihua from natural bauxite ore by calcination process to produce a high performance refractory grade bauxite also known as calcined bauxite or refractory bauxite for refractory raw material service
- Engineering-proven characterized with high alumina purity, low iron content, high bulk density, low porosity, low moisture content, and high temperature stability for refractory manufacturing
- Five chemistry grades RK70 / RK75 / RK80 / RK85 / RK87 covering Al2O3 content minimum 70 to 87 percent for matching different high alumina brick, high alumina castable, and mullite brick manufacturing requirements
- Main specifications including Al2O3 content, Fe2O3 content, TiO2 content, CaO+MgO content, K2O+Na2O content, Bulk Density, and Water Absorption for refractory manufacturing
- Widely used as the refractory grade bauxite for high alumina brick, high alumina castable, mullite brick, andalusite brick, brown fused alumina, bauxite cement, abrasives, ceramics, chemistry, aluminium metallurgy, and precision casting industry worldwide
Product Specification
Refractory grade bauxite is engineered per buyer’s high alumina refractory manufacturing requirement. Custom chemistry and grade available on request.
| NO | Items | RK70 | RK75 | RK80 | RK85 | RK87 |
|---|---|---|---|---|---|---|
| 1 | Al2O3 | ≥ 70 | ≥ 75 | ≥ 80 | ≥ 85 | ≥ 87 |
| 2 | Fe2O3 | ≤ 2 | ≤ 2 | ≤ 2 | ≤ 1.8 | ≤ 1.5 |
| 3 | TiO2 | / | / | ≤ 4 | ≤ 4 | ≤ 4 |
| 4 | CaO+MgO | ≤ 0.6 | ≤ 0.6 | ≤ 0.5 | ≤ 0.4 | ≤ 0.4 |
| 5 | K2O+Na2O | ≤ 0.6 | ≤ 0.6 | ≤ 0.5 | ≤ 0.4 | ≤ 0.4 |
| 6 | Bulk density | 2.95-3 | 2.95-3 | 3.1-3.15 | 3.2-3.25 | 3.3-3.35 |
| 7 | Water Absorption | ≤ 5 | ≤ 5 | ≤ 5 | ≤ 3 | ≤ 3 |
Note: Refractory grade bauxite chemistry data is per customer specifications. Available bauxite aggregate sizes: 0-0.3mm, 0-0.5mm, 0-1mm, 1-3mm, 3-5mm, 5-8mm. Available bauxite powder sizes: 100 mesh, 200 mesh, 325 mesh. Custom chemistry, grade, and particle size available on request. For project-specific chemistry and grade, contact CH Refractories engineering.
Product Applications
Refractory grade bauxite is engineered per buyer’s high alumina refractory manufacturing requirement. Custom chemistry and grade available on request.
| NO | Items | RK70 | RK75 | RK80 | RK85 | RK87 |
|---|---|---|---|---|---|---|
| 1 | Al2O3 | ≥ 70 | ≥ 75 | ≥ 80 | ≥ 85 | ≥ 87 |
| 2 | Fe2O3 | ≤ 2 | ≤ 2 | ≤ 2 | ≤ 1.8 | ≤ 1.5 |
| 3 | TiO2 | / | / | ≤ 4 | ≤ 4 | ≤ 4 |
| 4 | CaO+MgO | ≤ 0.6 | ≤ 0.6 | ≤ 0.5 | ≤ 0.4 | ≤ 0.4 |
| 5 | K2O+Na2O | ≤ 0.6 | ≤ 0.6 | ≤ 0.5 | ≤ 0.4 | ≤ 0.4 |
| 6 | Bulk density | 2.95-3 | 2.95-3 | 3.1-3.15 | 3.2-3.25 | 3.3-3.35 |
| 7 | Water Absorption | ≤ 5 | ≤ 5 | ≤ 5 | ≤ 3 | ≤ 3 |
Note: Refractory grade bauxite chemistry data is per customer specifications. Available bauxite aggregate sizes: 0-0.3mm, 0-0.5mm, 0-1mm, 1-3mm, 3-5mm, 5-8mm. Available bauxite powder sizes: 100 mesh, 200 mesh, 325 mesh. Custom chemistry, grade, and particle size available on request. For project-specific chemistry and grade, contact CH Refractories engineering.
