METHOD FOR PRODUCING ACIDIC GAS AND HEAVY METALS ADSORBENT USING BLAST FURNACE SLAG

摘要

The present invention provides a method for manufacturing an acidic gas and heavy metal adsorbent using a blast furnace slag comprising: an acid treatment step of precipitating blast furnace slag powder in an acidic solution to obtain an acid-treated blast furnace slag; an alkaline treatment step of supplying an alkaline solution to the acid-treated blast furnace slag to obtain an alkaline-treated blast furnace slag; a filtering step of filtering the alkaline-treated blast furnace slag to obtain a filtered blast furnace slag; a step of introducing a sulfide to the filtered blast furnace slag to obtain a sulfide-containing blast furnace slag; and a heat treatment step of treating the sulfide-containing blast furnace slag with heat to obtain a heat-treated blast furnace slag. Thus, the present invention has an effect of fixing heavy metals in collected dust generated during industrial processes to control elution into the air; and adsorbing acidic gas in exhausted gas to prevent release into the air.