Brown Fused Alumina

Brown Fused Alumina
Brown Fused Alumina

Brown fused alumina is produced by melting high-quality bauxite, iron filings, and anthracite in an electric arc furnace at high temperatures. The material is then crushed, shaped in a self-grinding machine, iron is removed by magnetic separation, and it is screened into various sizes. The main chemical component is Al2O3, with a content of 94%-96%, along with small amounts of Fe, Si, and Ti. It has a dense texture, high hardness, and is brown in color with great toughness. Brown fused alumina is suitable for manufacturing ceramic and resin high-bond abrasives, as well as for grinding, polishing, sandblasting, precision casting, and refractory materials.

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Typical Chemical Analysis

Applications Standard Sizes Chemical Composition (%) Magnetic Content (%)
Al2O3 Fe2O3 SiO2 TiO2
Abrasives F 8#-80# ≥95 ≤0.5 ≤1.5 ≤3.0 ≤0.05
90#-150# ≥94 ≤0.03
180#-240# ≥93 ≤1 ≤2 ≤4 ≤0.02
P 8#-80# ≥95 ≤0.5 ≤1.5 ≤3.0 ≤0.05
100#-150# ≥94 ≤0.03
180#-220# ≥93 ≤1 ≤2 ≤4 ≤0.02
P280-P800 ≥92 ≤0.5 ≤1.8 ≤4.0 -
W W63-W7 ≥92 ≤0.5 ≤1.8 ≤4.0
Refractories Fraction 0-1mm 1-3mm 3-5mm 5-8mm ≥95 ≤0.5 ≤1.5 ≤3.0 -
Fine Powder 200-0 320-0 ≥92.0 ≤1 ≤2 ≤4 -

Typical Physical Properties

Color Brown
Cyrstal Form Trigonal system
Specific Gravity 3.95
Bulk Density 1.53-1.99g/cm3
Mohs Hardness ≥9
Melting Point 2200℃
Maximum Use Temperature 1850℃
True Density ≥3.60g/cm3
Test Report

Differences Between P-Grit and F-Grit Brown Fused Alumina

  • Brown Fused Alumina

    F-grit is employed in bonded abrasives, featuring granular or gem-like particle shapes with high packing density.

  • Brown Fused Alumina

    P-grit is primarily utilized in coated abrasives, characterized by angular needle-like particle shapes, relatively lower packing density, and a more concentrated particle size distribution.

Applications

Segment grain Utilized in various applications such as unshaped refractory materials, shaped refractory materials, casting materials, refractory materials for ladles, and series of combined bricks for blast furnaces and hot blast stoves. Also employed in high-alumina bricks, carbon-containing materials, mullite bricks, gunning mix, ceramic cups, clay bricks, composite bricks, corundum products, furnace materials, refractory brick raw materials, and abrasive raw materials for steel plants, foundries, and high-end refractory materials for glass factories.
Fine powders
Grit size 1. Used for sandblasting and grinding of metal and non-metal products.
2. Applied in building ceramics, special ceramics, and craft ceramics.
3. Utilized in coarse grinding and high-pressure cutting, wear-resistant products, and as additives.
4. Used as raw materials in the production of resin abrasives and coated abrasives, such as sandpaper and abrasive cloth.
5. Employed as filtration media.
6. It functions as filler in automotive brake parts, special tires, and special construction products. It can also be used for constructing highway pavements, airport runways, docks, parking lots, industrial floors, and sports grounds as wear-resistant materials.
7. Used in abrasive water jet cutting.
Micro powder Used in bonded abrasives, coated abrasives, as well as in floor/wall laminates for polishing, grinding, ceramics, and tiles.

Production Flow

Raw material selection → crushing → grinding → mixing and forming → high-temperature smelting → cooling and crushing → screening and packaging

Brown Fused Alumina
  • Brown Fused AluminaRaw material: Bauxite
  • Brown Fused Aluminacoarse crushing
  • Brown Fused AluminaHigh-temperature smelting
  • Brown Fused AluminaBall milling
  • Brown Fused AluminaMagnetic separation and screening
  • Brown Fused AluminaWeighing and packaging
Fused Alumina

Use in many different industries such as abrasives, refractories, sandblasting etc.

Other Fused Materials