METHOD FOR PREPARATION OF WATER-CONTAINING COMMERCIAL GEL-LIKE EXPLOSIVES Russian patent published in 1999 - IPC

FIELD: mining industry and construction at preparation of explosives directly in situ with employment of mixing-loading machines. SUBSTANCE: originally, by mixing water, thickener and hexamethylenetetramine and by nitrolysis of hexamethylenetetramine in the process of mixing until dinitrate of hexamethylenetetramine is obtained, a liquid mother liquor of explosive is produced, which is conveyed to at least one accumulating vessel, ammonium nitrate is oiled by liquid combustible, and then the mother liquor and oiled ammonium nitrate are mixed in a separate mixer or vessel of the mixing-loading machine. Besides, in the process of production of the mother liquor ammonium nitrate is additionally introduced in the mixture. This process is accomplished in a separate room, and the liquor from the accumulating vessel or vessels is conveyed directly to the plant or group of plants carrying out blasting operations. Polyacrylamide or sodium salt of carboxymethylcellulose is used as thickener, and alum or salts of metals - as structuring additive. EFFECT: enhanced safety, quality and reduced cost of explosive preparation. 5 cl