METHOD FOR PRODUCING Ca(OH)2 AQUEOUS SLURRY

摘要

PROBLEM TO BE SOLVED: To provide a method for producing Ca(OH)aqueous slurry which contains Ca(OH)particles having 0.05-1.0 μm average particle diameter and a dispersant of 1.0-2.3 pts. mass on the basis of 100 pts. mass of Ca(OH)and has 30-55 mass% slurry concentration.SOLUTION: The method for producing Ca(OH)aqueous slurry comprises the steps of: using a reactor including a grinder and a preliminary mixer; adding quicklime and the dispersant continuously or successively to the water-filled preliminary mixer while taking 30 minutes; and reacting the added quicklime with the added dispersant while keeping the slurry temperature in the grinder at 60°C or lower. It is preferable that a circulation type bead mill is used as the grinder, a grinding medium having 0.03-2 mm diameter is used and a cationic polymer dispersant is used as the dispersant.