Slurry of coal, water and dispersing agent

Details Slurry of coal, water and dispersing agent Slurry of coal, water and dispersing agent

C - Chemistry, Metallurgy

10

L

44/10

C10L 1/32 (2006.01) B03D 1/001 (2006.01) B03D 1/016 (2006.01)

Patent

CA 1102549

CANADIAN PATENT APPLICATION OF OLLE LENNART SIWERSSON ARNE EVERT WALL and JAN AKE TORSTEN LOODBERG FOR COMPOSITION COMPRISING A PULVERIZED PURIFIED SUBSTANCE, WATER AND A DISPERSING AGENT, AND A METHOD FOR PREPARING THE COMPOSITION Abstract of the Disclosure A composition consisting of carbon powder, water and a dispersing agent. The particle size of the carbon powder is less than 100 µm, preferably less than 40 µm. The com- position is obtained by preparing a mixture of about 1-20% by weight, preferably about 10% by weight, of carbonaceous powder, water and 0.02-4% by weight of dispersing agent. The dispersing agent is selected preferably from polyelectro- lytes, such as alkali metal and ammonium salts of polycar- boxylic acids, and polyphospates. These substances possess the property of charging the powder particles of carbon and the impurity particles in a different degree. This different charging is utilized to separate impurity particles from carbon particles, whereupon the purified composition is suitably dehydrated to attain an increased carbon powder concentration of, for instance, 50-80% by weight.

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