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Dense fused alumina fine powder 0-1mm -200 -180 -320, light gray or gray-white powder. The main crystal phase of dense fused alumina is α-Al2O3. The α-Al2O3 content is more significant than 98%; the porosity is less than 4%. It is a new high-purity refractory raw material made using high-purity industrial alumina powder and reducing agent according to a certain ratio in an electric arc furnace after being melted at a high temperature. Dense fused alumina fine powder is the product passing through the finest screen in the refractory sand production line. Dense fused alumina fine powder is characterized by acid and alkali resistance, reasonable wear and corrosion resistance, and volume stability. Furthermore, it is mainly used for metallurgy, ceramics, the chemical industry, etc. It produces blast furnace troughs and castable and high-quality raw material to produce various corundum products.
Introduction of Dense fused alumina fine powder 0-1mm -200 -180 -320：
Dense fused alumina pine powder, with α-AL2O3, as the main crystalline phase, gray, is characterized by high melting point, high bulk density, low apparent porosity, excellent wear resistance, slag resistance, steady volume, and thermal shock resistance. It is an excellent refractory material in the fused alumina series.
Dense fused alumina is fused in the furnace with the industrial alumina as the raw material; it is a new refractory material. Its characteristics are acid & alkali-proof, good grinding performance, erosion-resistant, and steady volume.
Application of dense fused alumina fine powder 0-1mm -200 -180 -320：
Chemical compositions and physical properties：
| Item | Fine powder | Typical value |
| Al2O3 (%) ≥ | 99 | 99.4 |
| SiO2 (%) ≤ | 0.7 | 0.5 |
| Fe2O3 (%) ≤ | 0.1 | 0.05 |
| TiO2 (%) ≤ | 0.1 | 0.05 |
| CaO (%) ≤ | 0.1 | 0.05 |
| MgO (%) ≤ | 0.1 | 0.05 |
| Na2O (%) ≤ | 0.1 | 0.05 |
| C (%) ≤ | 0.12 | 0.1 |
| Apparent porosity (%) ≤ | 2 | 0.8 |
| Bulk density (g/cm3) ≥ | / | / |
| True density (g/cm3) ≥ | 3.96 | 3.98 |
The refractive index of fused alumina is approx. 1.76, whereas that of normal glass types is approx. 1.4. The closer the refractive indices are to each other, the more transparent the system (e.g. varnishes).
Dynamic image analysis (DIA) Static light scattering (SLS, also called laser diffraction) Screen analysis Impedance method Sedimentation
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