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DA ABRASIVES PROVIDES science management system and perfect quality control system such as omec particle size analyser, slap-sieve ,Japan SHIMADZU spectrometer and so on.
Brown Fused Alumina(BFA) is also called brown aluminum oxide (brown corundum, silicon carbide) , It is made from calcined bauxite. It is a hard and tough material, used in manufacturing of grinding wheels . (both vitrified and resin bonded and coated products.) These grains are also used for shot blasting and as polishing media. Refractory grade BFA is used as a raw material in the manufacture of high alumina refractory. It is available in grit sizes as per FEPA for abrasive applications and group grits for refractory applications.
Grit size & bulk density/Barmac crush,Blocky shape grits
| Size | B.D.(g/cm3) | Size | B.D.(g/cm3) | Size | B.D.(g/cm3) |
| 12 | 1.95-2.08 | 36 | 1.86-1.96 | 90 | 1.64-1.76 |
| 14 | 1.93-2.05 | 40 | 1.83-1.93 | 100 | 1.62-1.74 |
| 16 | 1.92-2.04 | 46 | 1.76-1.88 | 120 | 1.61-1.73 |
| 20 | 1.91-2.03 | 54 | 1.75-1.87 | 150 | 1.60-1.72 |
| 22 | 1.90-2.02 | 60 | 1.70-1.82 | 180 | 1.58-1.68 |
| 24 | 1.90-2.00 | 70 | 1.68-1.80 | 220 | 1.56-1.67 |
| 30 | 1.88-1.98 | 80 | 1.66-1.78 | 240 | 1.56-1.72 |
Chemical Analysis
| Specification | Chemical Composition(%) | Magnetic material | |||||
| Al2O3 | Fe2O3 | SiO2 | TiO2 | content(%) | |||
| FEPA | 12#-54# | ≥95.3 | ≤0.2 | ≤1.0 | 2.0-3.5 | ≤0.02 | |
| 60#-100# | ≥95.0 | ≤0.2 | ≤1.0 | 2.0-3.5 | ≤0.02 | ||
| 120#-240# | ≥94.5 | ≤0.3 | ≤1.2 | 2.0-3.5 | ≤0.02 | ||
FEPA brown aluminium oxide for grinding wheels
| Color | Brown |
| Moh's hardness | ≥9.0 |
| Melting point | 2250ºC |
| The maximum temperature | 1900ºC |
| Specific gravity | 3.95 |
| Bulk density | 1.53-1.99c/cm3 |
| Real density | ≥3.90c/cm3 |
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