METHOD OF RECOVERING METAL FROM WASTE MATERIAL USING USED MOLDING SAND AND MANUFACTURING ARTIFICIAL MOLDING SAND AND ARTIFICIAL MOLDING SAND MANUFACTURED BY THE SAME

摘要

The present invention relates to a method of using a waste foundry sand for the recovery of useful metals contained in a waste catalyst or a wet process sludge, and at the same time making it possible to manufacture the used waste foundry sand into artificial foundry sand. The method according to the present invention comprises the steps of: (a) charging a wet process wet process sludge or a waste containing a waste catalyst, a waste casting sand, and a raw material including a reducing agent into a reduction furnace, and (b) heating the charged raw material. Thus, a dissolving step of reducing some of the metals contained in the waste while forming slag through the components contained in the waste and the waste foundry, (c) separating the slag and the reduced metal, (d ) It characterized in that it comprises the step of producing spherical particles using the slag from which the metal is separated.