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Brown fused alumina also called brown aluminum oxide, brown corundum, emery, it is a brown artificial corundum made by melting and reducing three raw materials: bauxite, carbon material and iron filings in an electric arc furnace. The main chemical components of brown fused alumna is AL2O3, with a content of 95.00%-97.00%, and a small amount of Fe, Si, Ti, etc. Brown fused alumina is the most basic abrasive. Because of its good grinding performance, wide application range and low price, it is widely used.
Standard |
Chemical compositions (%) |
Magnetic (%) |
||||
Al2O3 |
Fe2O3 |
SiO2 |
TiO2 |
|||
F |
4#— 80# |
≥95 |
≤0.3 |
≤1.5 |
≤3.0 |
≤0.05 |
90#— 150# |
≥94 |
≤0.03 |
||||
180#— 220# |
≥93 |
≤0.3 |
≤1.5 |
≤3.5 |
≤0.02 |
|
230 -1500# |
≥92 |
≤0.3 |
≤1.5 |
≤3.5 |
≤0.02 |
|
P |
8#— 80# |
≥95.0 |
≤0.` |
≤1.2 |
≤3.0 |
≤0.05 |
100#— 150# |
≥94.0 |
≤0.03 |
||||
180#— 220# |
≥93.0 |
≤0.3 |
≤1.5 |
≤3.5 |
≤0.02 |
|
JIS |
JIS240-JIS6000 |
≥92 |
≤0.5 |
≤1.8 |
≤4.0 |
— |
Section sand |
0-1mm 1-3mm 3-5mm 5-8mm 8-12mm |
≥95 |
≤0.3 |
≤1.5 |
≤3.0 |
— |
|
25-0mm 10-0mm 50-0mm 30-0mm |
≥95 |
≤0.3 |
≤1.5 |
≤3.0 |
— |
|
Brown fused alumina is called industrial teeth: mainly used in refractories, grinding wheels, and sandblasting.
1.Used to manufacture advanced refractory materials, castables, refractory bricks, etc.
2. Sandblasting— the abrasive has moderate hardness, high bulk density, no free silica, high specific gravity, and good toughness. It is an ideal "environmental protection" type sandblasting material, widely used in aluminum profiles, copper profiles, glass, and washed jeans. Precision molds and other fields;
3. Free grinding-grinding grade abrasives, used for free grinding in the fields of picture tubes, optical glass, monocrystalline silicon, lenses, watch glass, crystal glass, jade, etc. It is a high-grade grinding material commonly used in China
4. Resin abrasive tools-abrasives with suitable color, good hardness, toughness, suitable particle cross-section type and edge retention, applied to resin abrasive tools, the effect is ideal;
5. Coated abrasive tools-the abrasive is sandpaper , Gauze and other manufacturers' production materials; brown corundum section sand, brown corundum section sand
6, Functional filler-mainly used for automobile brake parts, special tires, special construction products and other collars, which can be used to build highway roads and runways. Wharf, parking lot, industrial floor, sports ground and other wear-resistant materials;
7. Filter media-a new application field of abrasives. Granular abrasives are used as the bottom media of the filter bed to purify drinking water or wastewater. It is a new type of domestic and foreign Water filter material, especially suitable for non-ferrous metal beneficiation: Petroleum drilling mud weighting agent:
8. Hydraulic cutting-uses abrasives as cutting media and relies on high-pressure water jets for basic cutting. It is applied to oil (natural gas) pipelines, steel and other components Cutting is a new, environmentally friendly and safe cutting method.
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