FLY-ASH GRAIN OR LUMP COATED BY BOTTOM ASH AND METHOD OF PRODUCING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide fly-ash grains or lumps coated by bottom ash which are made harmless by coating the surface of granulated fly-ash exhausted from a thermal power station using coal, etc., while investigating the exudation behavior of metals from the granulated fly-ash enabling effective utilization of fly-ash at a low cost, and to provide a method of producing it. SOLUTION: This fly-ash grains or lumps coated by bottom ash are obtained by coating the granulated fly-ash which is obtained by granulation of fly-ash from coal ash with bottom ash from the same coal ash to suppress the exudation of harmful elements contained in the fly-ash.