Brown Fused Alumina
Brown fused alumina is made from bauxite and coke (anthracite) smelted in the tilting arc furnaces by high temperature,Its main composition is AL2O3.Featured by quality of strong hardness and great toughness,it is widely used in making ceramic and resin bonded abrasive tools,polishing and sand blasting.Characterized by its high temperature resistance,it also can be used for the main raw material of middle and low level unshaped and shaped refractory material.
| Chemical composition （%） | Item | Sand | Fines | Powder |
| Al2O3 | ≥95 | ≥93.5 | ≥90 |
| SiO2 | ≤1.5 | ≤1.5 | ≤2.0 |
| Fe2O3 | ≤0.3 | ≤0.5 | ≤0.8 |
| TiO2 | 1.5-3.8 | 1.7-3.4 | ≤4.0 |
| Moh's hardness | 9 | 9 | |
| Hardness | HV2000-2200 | HV2000-2200 | HV2000-2200 |
| True density（g/m3） | ≥3.9 | ≥3.9 | ≥3.9 |
| Refractoriness（℃） | ≥1850 | ≥1850 | ≥1850 |
| Magnetics | 0.04-0.10 | 0.04-0.10 | 0.04-0.10 |