Coarse grade of flake aluminium powder is non-ignitable and with controlled fatty acid content. It reacts with phosphorus in the production of aluminium phosphide (used as fumigant in the grain storage godowns).
Grade | Free Al. Purity | Wet Sieve Analysis | Water Coverage Area | Fatty Acid | Apparent Density | Particle Size Distribution |
%(min.) | Retention on 45µm % (max) | cm2/gm | % (max.) | gm/cc | D50 (µm) | |
Test Methods | IS 438 | ISO 1247 | IS 438 | IS 438 | In House | Sympatec (Helos BF/BR - Magic) |
ALPHOS - U | 94.0 | 55 TO 65 | 2500 To 4500 | 1.0 | 0.28-0.35 | 70-75 |
ALPHOS - S | 93.5 | 55 TO 65 | 2000 To 5000 | 3.0 | 0.30-0.40 | 70-75 |
Wet sieving with mineral spirit as rinsing liquid.