Blasting composition

Details Blasting composition Blasting composition

1979-06-07

1981-10-13

Lechert, Jr., Stephen J.

Explosive and thermic compositions or charges

Structure or arrangement of component or product

149 43, 149 46, 149 60, 149 61, C06B 4500

Patent

active

042946336

ABSTRACT:
A blasting composition of high solids content, usually of plastic solid consistency, is composed of 60 to 90 parts by weight of solid particulate oxidizer salt, which is mainly ammonium nitrate, preferably fertilizer grade prills, and 10 to 40% of liquid slurry partially filling the interstices and voids in and between the solid particles. The slurry is one that will not appreciably dissolve or soften the granules, hence it is preferably a substantially saturated and thickened solution, in non-aqueous solvent, of strong oxidizer salt, typically ammonium and/or calcium nitrate to which sodium nitrate may be added. The preferred solvent is a low molecular weight polar organic liquid, selected from the group consisting of methanol, ethylene glycol, formamide and ethanol. In some cases isopropanol or propylene glycol may be included. The slurry is of greater density than the bulk granular solids so that it will significantly increase the overall bulk density of the composition which should contain enough dispersed air to improve its sensitivity to detonation over that of a similar composition containing no air filled voids.

REFERENCES:
patent: 4111727 (1978-09-01), Clay

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