F - Mech Eng,Light,Heat,Weapons – 42 – D
Patent
F - Mech Eng,Light,Heat,Weapons
42
D
F42D 1/08 (2006.01) C06B 23/00 (2006.01) F42D 1/10 (2006.01) F42D 3/00 (2006.01) F42D 5/00 (2006.01)
Patent
CA 2240755
The invention comprises a method of preventing afterblast sulfide dust explosions in blasting operations involving sulfide-containing ores, which method comprises (a) loading a borehole that has been drilled into a sulfide-containing ore body with an emulsion blasting agent that comprises an emulsifier, a continuous organic fuel phase, a density control agent, and a discontinuous oxidizer salt solution phase that comprises inorganic oxidizer salt(s), water and urea as a chemical inhibitor in an amount of from about 1% to about 10% by weight of the blasting agent, the blasting agent being loaded in a coupling relationship with the borehole; and (b) detonating the blasting agent.
L'invention comprend une méthode pour prévenir les explosions de poussière de sulfure post-déflagration lors des opérations de sautage de minerai sulfuré; la méthode consiste à : a) remplir un trou de mine dans un gisement de minerai sulfuré avec un explosif sous forme d'émulsion, renfermant un émulsifiant, une phase continue de carburant organique, un régulateur de masse volumique, et une phase discontinue d'une solution de sel oxydant, à base d'un ou de plusieurs sels oxydants minéraux, d'eau et d'urée comme inhibiteur chimique, à raison d'environ 1-10 % en poids de l'explosif; ce dernier est chargé selon une relation de couplage avec le trou de mine; b) faire sauter l'explosif.
Borden Ladner Gervais Llp
Dyno Nobel Inc.
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