Alumina powder
Alumina powder is alumina Al2O3 solid powder, usually processed for α-al2o3 alumina powder, β-al2o3 alumina powder, γ-al2o3 alumina powder as a different use. α alumina powder has very stable physical and chemical properties, high hardness, wear resistance, high mechanical strength, insulation, high temperature resistance, low amount of burning, low coefficient of thermal expansion, good thermal conductivity and other characteristics, α alumina is usually used as abrasive, toughening agent, refractory materials, polishing materials, etc.
β-alumina powder and γ-alumina powder, also known as active alumina powder, have rich pore structure and large specific surface area, usually used for dehydrating agent, catalyst, catalyst support, etc.
α-Alumina Micropowder/Activated Alumina Micropowder
α-alumina micropowder production using high quality industrial alumina, aluminum hydroxide additive technology after low temperature phase conversion calcination, and then using advanced grinding technology and process, the production of activated alumina powder, which is characterized by large activity, low particle size. Especially suitable for shaping products and refractory castables, plastic, repair materials, spraying materials, coating materials and other shaped refractory materials, to improve the high temperature strength of refractory materials, improve the corrosion resistance of materials has a strong role.
Application of Kerui Alumina Powder / α-Alumina Micropowder
Unshaped refractory: refractory castable, self-flowing material, repair material, iron hook material, etc
Shaped refractory materials: refractory preform: breathable brick, base brick, non-carbon steel coated brick, RH-impregnated pipe castable, furnace cover, etc. Machine press products: high aluminum brick, high chromium brick, magnesium spinel brick, slide plate, water mouth brick, etc.
Parameters of Kerui α-Alumina Micropowder
| α-Alumina Micropowder | KRHA-101 | KRHA-101 | KRHA-102 | KRHA-102 | KRHA-103 | KRHA-103 |
| Guarantee | typical | Guarantee | Typical | Guarantee | Typical | |
| Al2O3, % | ≥99.5 | 99.52 | 99.5 | 99.6 | >99.5 | 99.53 |
| K2O+Na2O, % | ≤0.20 | 0.13 | <0.20 | 0.14 | ≤0.25 | 0.15 |
| Fe2O3, % | ≤0.05 | 0.02 | ≤0.05 | 0.02 | ≤0.08 | 0.03 |
| SiO2, % | ≤0.15 | 0.08 | ≤0.15 | 0.08 | ≤0.15 | 0.09 |
| D50, μm | <2.0 | 1.7 | 2.0~3.0 | 2.4 | 3.0~5.0 | 3.5 |
| α-A12O3, % | ≥93 | 95 | >93 | 95 | >93 | 96 |
| True Density, g/cm3 | >3.93 | 3.96 | >3.93 | 3.96 | > 3.93 > | 3.96 |
The production process of Kerui Alumina Powder / α-Alumina Micropowder
- Raw material ball mill: help to remove impurities, improve the firing process conversion rate, improve the reaction speed;
- Calcination in tunnel kiln: continuous and stable production can be achieved, and the calcination temperature is controlled accurately;
- Clinker ball mill: grind the clinker to the required particle size.
