Process for preparing high solid concentration coal- water...

Details Process for preparing high solid concentration coal- water... Process for preparing high solid concentration coal- water...

B - Operations, Transporting

03

D

361/2

B03D 1/02 (2006.01)

Patent

CA 1207923

Abstract of the Disclosure A pulverized coal slurry containing 5-25 weight percent pulverized coal particles, more than 50 weight percent of the particles being minus 200 mesh, is subjected to flotation for deashing and desulfurizing treatments to thereby recover as froth cleaned coal of 15-30 weight percent concentration. This froth is dewatered into a high solids concentration coal-water slurry of more than 60 weight percent. This slurry can be transported by pipe flow as a fluid fuel or it can be burned directly in a boiler without need for dewatering. In addition, the high-degree of deashing of the slurry according to the invention enhances combustion efficiency and reduces abrasion of the boiler.

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