ZEOLITE RESOURCE RECOVERY METHOD FOR PAPER INDUSTRY SLUDGE INCINERATION ASH CONTAINING HIGH PERCENTAGE OF UNBURNT CARBON

摘要

PROBLEM TO BE SOLVED: To provide a novel zeolite resource recovery method for recycling a large quantity of paper industry sludge generated as industrial waste. ;SOLUTION: Paper industry sludge containing silicic acid, aluminum and carbon or a mixture of the paper industry sludge and one kind or two kinds selected from a silicic acid enriching material and an aluminum enriching material, are treated in an aqueous alkaline solution by heat and ultrasonic wave. Consequently, a diversified material is obtained which is made up of a substance having a cationic exchange power and an active carbonlike unburnt carbon.;COPYRIGHT: (C)2001,JPO