Method of reducing nitrogen oxide fumes in blasting

Details Method of reducing nitrogen oxide fumes in blasting Method of reducing nitrogen oxide fumes in blasting

C - Chemistry, Metallurgy

06

B

C06B 23/02 (2006.01) C06B 45/00 (2006.01) C06B 47/14 (2006.01)

Patent

CA 2166499

Gases produced by the detonation of water-in-oil emulsion blasting agents in mining blasting operations contain toxic and visually and aesthetically undesirable yellow/orange nitrogen oxides. Urea is used in the method disclosed herein to chemically reduce the nitrogen oxides in the after-blast fumes. By using urea, which is a fuel, in the oxidizer salt solution of the emulsion blasting agent, less organic fuel can be used in the continuous organic fuel phase to achieve oxygen balance, particularly important in emulsion blends containing AN prills.

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