What is BFA F24 F30 F36 95% 90% 85-90% 70-80% 60-70% 45-60% Al2O3?
BFA=Brown Fused Alumina,is made from Calcined Bauxite. It is a hard and tough material, used in grinding wheels manufacturing (both vitrified and resin bonded) and coated products. These grains are also used for shot blasting and as polishing media.
F24 F30 F36 are the sizes of BFA,which decide how the particles big,exact particle size is as follows:
BFA F24
| SIEVE | STABDARD VALUE（%) |
| +1180um | 0 |
| +850um | ≤25 |
| +710um | ≥45 |
| +710um+600um | ≥65 |
| -500um | <3 |
BFA F30
| SIEVE | STANDARD VALUE（%) |
| +1000um | 0 |
| +710um | ≤25 |
| +600um | ≥45 |
| +600um+500um | ≥65 |
| -425um | <3 |
BFA F36
| SIEVE | STANDARD VALUE（%) |
| +850um | 0 |
| +600um | ≤25 |
| +500um | ≥45 |
| +500um+425um | ≥65 |
| -355um | <3 |
95% 90% 85-90% 70-80% 60-70% 45-60% Al2O3 means the purity of BFA.
Zhengzhou haixu abrasives co.,ltd,as main manufacturer of BFA in China,we mainly produce 6 grades BFA as follows：
A grade—-Al2O3≥95%
B grade—-Al2O3≥90%
C grade—-Al2O3：85-90%
D grade—-Al2O3：70-80%
E grade—-Al2O3：60-70%
F grade—-Al2O3：45-60%
Besides,all grades BFA for our factory is new material from the productions line,not Recycled sand made from waste ceramic grinding wheels.