Conversion of Steel Converter Slag into HCl Gas Scavenger Using Alkali Fusion

Abstract

Steel converter slag, a by-product of iron- and steel-making plants, was converted into a hydrogarnet-containing product using the alkali fusion method. The converter slag was transformed into an alkali-fused slag with reactive phases via alkali fusion using sodium hydroxide at 600°C for 6 h, after which the fused slag was stirred in distilled water at ambient temperature to prepare a precursor to synthesize a product, comprising hydrogarnet, by heating the precursor at 80°C. This product could remove HCl gas at a high temperature (800°C) and showed higher Cl fixation than slag and lime. These results suggest that a novel product capable of removing HCl gas at high temperatures can be synthesized from converter slag via alkali fusion.