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Brown fused alumina for refractory using high-quality calcined bauxite, coke, and iron by controlled melting in an electric arc furnace at high temperatures. Brown fused alumina for refractory possesses high purity, good crystal, strong fluidity, low coefficient of linear expansion, good corrosion resistance, and so on. Through decades of practical application in the refractory industry, Brown fused alumina can’t burst, pulverize and craze in the using course. In particular, its performance-cost ratio is much higher than other refractory materials, making brown fused alumina become the best aggregate and padding of brown fused alumina refractory materials.
Brown fused alumina for refractory 0-1mm 1-3mm 3-5mm 5-8mm production process：
Brown Fused Alumina Refractory uses the high-quality bauxite as raw material, mix with anthracite and iron fillings, melting at 2000℃ in the electrical arc, then crushing and screening the various size.
Application of brown fused alumina for refractory 0-1mm 1-3mm 3-5mm 5-8mm：
Brown Fused Alumina is utilized within the refractory industry to manufacture high alumina fired and monolithic refractory products like bricks and pre-cast shapes. Unshaped refractory like gunning material, ramming refractory mixes, refractory castables, refractory mortars refractory raw materials.
Chemical compositions of brown fused alumina for refractory 0-1mm 1-3mm 3-5mm 5-8mm：
| Item | First grade |
| Al2O3 | 93% – 97% |
| SiO2 | 1.0% – 3.0% |
| Fe2O3 | 0.2% – 1.0% |
| TiO2 | 1.5% – 3.8% |
| Bulk density | 1.5g/cm³ |
| True density | 3.95g-4.0g/cm³ |
Physical properties of brown fused alumina for refractory 0-1mm 1-3mm 3-5mm 5-8mm：
| Item | Index |
| Color | Dark Brown, Light brown |
| Crystal form | Trigonal crystal system, hexagonal crystal system |
| Hardness | 9 Mohs |
| Melting point | 2250℃ |
| Magnetic content | ≤0.05% |
| Linear expansion coefficient | 7-9（0 – 1600℃） |
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