Aluminium powders are used as a sensitizer in the manufacture of explosives. Differenent grades are processed to meet the specific needs of explosives manufacturers. Flake aluminium powders add strength to the slurry explosives, particularly its sensitisation property. Aluminium powder is generally hazardous in nature, but these powders are properly coated with fatty acids and special properties are generated to enhance its safety in handling and even in aqueous medium of different pH.
Grade | Free Al. Purity | Wet Sieve Analysis | Water Coverage Area | Fatty Acid | Wettability | Bulk Density | Particle Size Distribution |
% (min.) | Retention on 45µm % (max.) |
cm2/gm | % (max.) | minutes (min) | gm/cc | D50 (µm) | |
Test Methods | IS-438 | ISO 1247 | IS-438 | IS-438 | In House | In House | Sympatec (Helos BF/BR - Magic) |
LDS | 89 | 14 | 5000 TO 9000 | 4 | 10 | 0.20 ± 0.02 | 15 - 20 |
SDS | 88 | 12 | 9000 TO 12000 | 4 | 10 | 0.20 ± 0.02 | 13 - 18 |
Note:
Wet sieving with mineral spirit as rinsing liquid.
*Safety in Material Storage and Handling of Aluminium Powder