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US 6,113,714 AGranted
Ammonium nitrate fuel oil blasting composition having improved water resistance
AssigneeETI Canada
InventorsAndrew Richard, Earl Reckzin
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AssigneeETI Canada
InventorsAndrew Richard, Earl Reckzin
Estimating the term…
A water resistant blasting explosive comprises an organic carbonaceous fuel, an inorganic oxidizing salt, and particulate filler material, wherein prior to exposing the particulate filler material and the inorganic oxidizing salt to the organic carbonaceous fuel, from about 15 to about 60 wt % of the particulate filler material and the inorganic oxidizing salt are retained on a Tyler 10 sieve, from about 15 to about 60 wt % of the particulate filler material and the inorganic oxidizing salt are retained on a Tyler 14 sieve and from about 20 to about 60 wt % of the particulate filler material and the inorganic oxidizing salt are retained on a Tyler 20 sieve. The explosive is further characterized in that it is effectively free of gelling agents. The explosive has good water resistance and explosive energy.
A water resistant blasting explosive comprising an organic carbonaceous fuel, an inorganic oxidizing salt, and particulate filler material, wherein prior to exposing said particulate filler material and said inorganic oxidizing salt to said organic carbonaceous fuel, from about 15 to about 60 wt % of said particulate filler material and said inorganic oxidizing salt are retained on a Tyler 10 sieve, from about 15 to about 60 wt % of said particulate filler material and said inorganic oxidizing salt are retained on a Tyler 14 sieve and from about 20 to about 60 wt % of said particulate filler material and said inorganic oxidizing salt are retained on a Tyler 20 sieve, said explosive being free of gelling agent.
A blasting explosive comprising fuel oil, ammonium nitrate, and particulate filler material, said explosive being free of gelling agent, wherein prior to exposing said particulate filler material and said ammonium nitrate to said fuel oil, from about 15 to about 60 wt % of said particulate filler material and said ammonium nitrate are retained on a Tyler 10 sieve, from about 15 to about 60 wt % of said particulate filler material and said ammonium nitrate are retained on a Tyler 14 sieve and from about 20 to about 60 wt % of said particulate filler material and said ammonium nitrate are retained on a Tyler 20 sieve.
A method of increasing the water resistance of a blasting explosive comprising an organic carbonaceous fuel, and an inorganic oxidizing salt, said blasting explosive being free of gelling agent, said method comprising the step of incorporating particulate filler material as part of said blasting explosive, the particle size distribution of said particulate filler material sized to fill a portion of the interstitial spaces between the inorganic oxidizing salt particles to increase the water resistance of the blasting explosive.
A method of increasing the water resistance of a blasting explosive comprising an organic carbonaceous fuel, and an inorganic oxidizing salt, the blasting explosive being free of gelling agent, said method comprising selecting an inorganic oxidizing salt to reduce the voidage in the blasting explosive and to increase the water resistance of the blasting explosive.
In a method of producing a blasting explosive comprising manufacturing an inorganic oxidizing salt having a particular particle size distribution and mixing said inorganic oxidizing salt with an organic carbonaceous fuel, the blasting explosive being free of gelling agent, to produce said blasting explosive, the step of adjusting the particle size distribution of said inorganic oxidizing salt produced by said manufacturing step to reduce the voidage in the blasting explosive to produce a blasting explosive having improved water resistance.
Dependencies are inferred from the claim text.