THE EVALUATION OF METALLURGICAL VALUE OF CONVERTER SLAG

Abstract

The research of parameters of converter slag of JSC “ZSMK” was conducted, including the series of experimental smelting in a laboratory electric arc furnace. It was determined that the loss of iron with converter dump slag in JSC “ZSMK” after primary treatment on slag fields by removing of magnetic components is on the average 22.7 %, including 9,0 % in the form of metallic iron and 13,7 % in the oxides. In the process of sorting of slag the large fractions enrich themselves with oxide iron, mainly in the form of (FeO) and (Fe3O4), while the (Fe2O3) goes to the smaller fraction. In the process of melting of converter slag there is a partial recovery of iron, which is accompanied by an increase in the content of metallic iron in the average of 11,7 %. At the same time, the main part of the metallic iron is concentrated in large fractions (+40 mm) and is on the average of 18 %, while in the smaller fractions the content of the metallic iron is 5 – 6 %.