초록 ▼

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

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.

대표청구항 ▼

A blasting agent having a bulk density above 1.0 grams per cc. of generally solid or plastic solid consistency, based largely on particulate ammoniun nitrate, which comprises, in combination: (a) 60 to 90% by weight, based on the total, of solid particulate oxidizer sale which includes ammonium nitr

A blasting agent having a bulk density above 1.0 grams per cc. of generally solid or plastic solid consistency, based largely on particulate ammoniun nitrate, which comprises, in combination: (a) 60 to 90% by weight, based on the total, of solid particulate oxidizer sale which includes ammonium nitrate, and (b) 10 to 40% by weight of a thickened liquid component comprising a nitrate oxidizer salt dissolved in a polar organic solvent selected from the group which consists of methanol, ethylene glycol and, said solution being substantially fully saturated by said salt and only partially filling the interstices in component (a) to provide for sensitizing the overall composition to detonation by standard detonating devices.