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Brown fused alumina grit and crystallized under high temperature from calcined bauxite, coke, and iron mixture. Brown aluminium oxide has high compression strength, toughness, excellent self-sharpening, low thermal expansion coefficient, and excellent hydrophilia and cleanliness. Due to its good toughness and high hardness, brown fused aluminium oxide is suitable for bonded abrasives such as grinding wheels and cutoff wheels, coated abrasives, lapping, polishing, sandblasting abrasives that are used for grinding metals of high-tensile strength, such as carbon steel, general-purpose alloy steel, malleable cast-iron, and hard bronze, etc. It also can be used as refractory materials.
The process of brown fused alumina grit F-size F8-F220 :
Brown fused alumina is produced from high-quality bauxite. This process is conducted via the 3500 KVA electric arc furnace at a temperature higher than 2200℃.
bauxite is broken into crushing machine — elevating– roll crusher mill– sizing —magnetic separator —fine sieve —water washing (acid washing )—package (25kg/pp bag or 25kg paper bag,40 bags/ton bag or pallet )
Our brown fused alumina covers two production lines. The F type is mainly used for producing resin cutting /grinding wheels and sandblasting. The P-type is designed for coating abrasives.
FEPA Average grain size (µm) brown fused alumina grit F-size F8-F220
| F8 | 2000 – 2800µm |
| F10 | 1700 – 2360µm |
| F12 | 1400 – 2000µm |
| F14 | 1180 – 1700µm |
| F16 | 1000 – 1400µm |
| F20 | 850 – 1180µm |
| F22 | 710 – 1000µm |
| F24 | 600 – 850µm |
| F30 | 500 – 710µm |
| F36 | 425 – 600µm |
| F40 | 355 – 500µm |
| F46 | 300 – 425µm |
| F54 | 250 – 355µm |
| F60 | 212 – 300µm |
| F70 | 180 – 250µm |
| F80 | 150 – 212µm |
| F90 | 125 – 180µm |
| F100 | 106 – 150µm |
| F120 | 90 – 125µm |
| F150 | 63 – 106µm |
| F180 | 53 – 90µm |
| F220 | 45 – 75µm |
Typical physical properties of brown fused alumina grit F-size F8-F220
| Hardness | 9 Mohs |
| Grain shape | angular |
| Melting point | 2050 °C |
| Specific gravity | 3.9 – 4.1 g/cm3 |
| Bulk density | 1.5 – 2.1 g/cm3 |
Typical chemical analysis of brown fused alumina grit F-size F8-F220
| Al2O3 | 95.65 % |
| TiO2 | 2.42 % |
| Fe2O3 | 0.12 % |
| SiO2 | 0.92 % |
| CaO | 0.35 % |
The description of the grain shape can range from “angular” to “acicular” to “spherical”. When the value of the dimensionless form factor is 1, the grain is spherical. The smaller the form factor, the pointier the grain.
Yeah, We are the manufacturer of BFA, WFA, GC. Also,we had good business relationship with others abrasive media & refractory raw materials manufacturer . more over we have QC department which make strict inspection on goods quality, packing, so we can provide a stable and quick delivery of all the
Bank T/T, L/C at sight, Westunion.
We are a manufacturing and trading combo,produce and export fused alumina for more than 10 years.
Generally, it will take 30 to 60 days after receiving your advance payment. The specific delivery time depends .on the items and the quantity of your order.
Mohs hardness (according to Friedrich Mohs, 1773 – 1839) ascribes a relative hardness value to certain known minerals on a scale ranging from 1 (talc) to 10 (diamond). Accordingly, a mineral is considered harder than another if it can scratch the latter. Please note that these values merely form an
Over the past 18 years, TAOANG products range from raw material bauxite to processing follow-up products brown fused alumina, finishing white fused alumina and dense fused alumina, bubble alumina, and fused alumina micro powder. The production process is
Over the past 18 years, TAOANG products range from raw material bauxite to processing follow-up products brown fused alumina, finishing white fused alumina and dense fused alumina, bubble alumina, and fused alumina micro powder. The production process is
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