Brown fused alumina is made of high-quality bauxite as raw material, anthracite and iron filings. It is made by arc smelting at 2000°C or higher temperature. It is crushed and plasticized by self-grinding machine, magnetically selected to remove iron, sieved into various sizes, and its texture is dense and hard. High, spherical pellets, suitable for the production of ceramic, high-resistance abrasive resin and grinding, polishing, sandblasting, precision casting, etc., can also be used to manufacture high-grade refractories.
Chemical and Physical Features |
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Items
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Al2O3
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Fe2O3
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SiO2
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Bulk density
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Color
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Application
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Grade I
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≥95
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≤0.3
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≤1.5
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3.85
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Maroon
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Refractory material,
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Grade II
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≥95
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≤0.3
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≤1.5
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3.85
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Black particle
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fine polishing
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Grade III
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≥95
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≤0.3
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≤1.5
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3.85
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Gray powder
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Polishing, grinding
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Grade IV
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≥95
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≤0.3
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≤1.5
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3.85
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Black particle
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Grinding, cutting, sandblasting
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Grade V
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≥95
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≤0.3
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≤1.5
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3.85
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Gray powder
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Polishing, grinding
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High refractoriness, High refractoriness under load
Good slag resistance and corrosion resistance
High density, low porosity Scouring resistance
Good thermal shock stability
High strength and wear resistance
Good resistance to flake performance
Good hot strength
1.Brown fused alumina is suitable for making ceramic and resin bonded abrasive tools, used for grinding metals of high-tensile strength, such as carbon steel, general purpose alloy steel, malleable cast-iron and hard bronze etc.
2. It’s widely used as surface preparation abrasive, cleaning, grinding, polishing of various metals, glass, rubber, mould industries.
3. It also can be used as refractory material.
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