METHOD FOR WASHING GRANULAR SOLIDS WITH VACUUM FILTERING

摘要

PROBLEM TO BE SOLVED: To provide a method for effectively washing granular solids having a wide particle distribution. SOLUTION: In a method for washing granular solids by which a slurry containing the granular solids having a wide particle distribution is separated to solids and a liquid with a vacuum filtering and then the granular solids are washed, the cake once formed by separating the solvent, etc., and the granular solids by vacuum filtering is mixed with a washing liquid under normal pressure and stirred to again form a slurry only once, and is again filtered under vacuum to form a cake layer again and the again formed cake layer is washed with a washing liquid.