Slurry Explosive -
it is a mixture of super saturated aquas salt solution (mainly ammonium Nitrate or Sodium Nitrate) & water (15%). This chemical mixture is thickened with guar-gum and cross linked. This enables to prevent leaching of the soluble oxidizing salts by the presence of water in the blasthole. This make slurries or water-gel excellent. The most commonly used fuel sensitizers are carbonaceous fuels, ammonium, TNT, and smoke less powder. These fuel sensitizers indentity the types of slurries as aluminized slurry, TNT slurry and smokeless powder slurry. Excess sensitizer also causes an oxygen deficiency in the mixture. |
| Slurry Explosive |
Composition of slurry-
Ammonium nitrate - 30-50%Sodium nitrate - 5-15%
Water - 10-25%
Fuel. - 2-5%
Flake aluminium - 2-5%
Mono methyl ammonium nitrate - 20-30%
Gourgum - 1-3%
Cross linking agent - 0.05-0.15%
Characteristic of slurry explosive-
1.VOD - 3500 - 5500m/s2. Sensitivity - cap and booster sensitive
3. Impact sensitivity - more than 10kg/m
4. Density - 1.05- 1.6gm/cc
5. Absolute Weight strength - 600 - 1100kcal/kg
6. Relative Bulk strength - 110-150% of ANFO
7. Relative weight strength - 80 - 100% of ANFO
8. Water resistance - Excellent
9. Temperature - 4 °- 100°C
10. Good fume characteristic.
Advantages of slurry explosive-
1. VOD is high.
2. Excellent water resistance.
3. Easy to manufacture.