PRODUCTION OF SPRAYED GRANULAR POWDER OF CARBONACEOUS POWDER BY SPRAYING

摘要

PROBLEM TO BE SOLVED: To obtain a binder added slurry of carbonaceous powder having a higher concn. and low viscosity and fit to produce sprayed granular powder by spraying while using a small amt. of a dispersant by using a polymer dispersant selected from among condensed ammonium naphthalenesulfonate, a styrene-acrylic acid copolymer and a styrene-maleic acid copolymer as the dispersant. SOLUTION: When an aq. slurry of carbonaceous powder is produced, 1-5 pts.wt. condensed ammonium naphthalenesulfonate and/or 0-3 pts.wt. styrene- acrylic acid copolymer and/or 0-3 pts.wt. styrene-maleic acid copolymer is added a dispersant to 100 pts.wt. of the carbonaceous powder. The resultant slurry to carbonaceous powder is regulated to 20-70wt.% water content and <=500cP viscosity and it is spray-dried to obtain the objective granular powder. The slurry contains a binder such as a wax emulsion.