Stable nitrate/slurry explosives

Details Stable nitrate/slurry explosives Stable nitrate/slurry explosives

1985-03-11

1986-04-29

Lechert, Jr., Stephen J.

Explosive and thermic compositions or charges

Structure or arrangement of component or product

149 21, 149 60, 149 38, 149 40, 149 41, 149 43, 149 44, 149 61, 149 62, 1491096, C06B 4500

Patent

active

045854955

ABSTRACT:
Explosives that are sensitized blends of inorganic nitrate, e.g., AN, particles, such as AN or ANFO prills, and an aqueous slurry comprising a thickened aqueous solution of an inorganic oxidizing salt, preferably AN, are rendered storage-stable by keeping the slurry's water content low enough, and its viscosity high enough, that the slurry is water-retentive. Water immobilization in the slurry, a requirement for storage stability, is achieved despite the slurry's flowable consistency at the time of blending. A blend containing about 25% slurry or less, is essentially in the form of a granular mass of free-flowing, high-density, slurry-bearing prills, and the slurry is sensitizable by the prills alone. As the slurry content exceeds about 25%, the blend takes on the characteristics of a thick slurry, requiring a supplemental sensitizer in the slurry per se. Slurries containing a nitrogen-base salt of an inorganic oxidizing acid, preferably monomethylamine nitrate, are preferred because this additive affords a saturated solution with lower water content, and also can act as a sensitizer.

REFERENCES:
patent: 4380482 (1983-04-01), Sandell

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