METHOD FOR RECOVERING METALLIC CHROMIUM FROM SLAG CONTAINING CHROMIUM OXIDE

摘要

PROBLEM TO BE SOLVED: To provide a method for recovering metallic chromium from slag which includes chromium oxide from converter process, such as AOD, MRP, AOD-L, MRP-L, CLU, ASM, Conarc-stainless steel or vacuum process, such as VOD, SS-VOD, RH, top blowing RH.SOLUTION: The slag, produced at the end of blowing process or treatment process in a converter or a vacuum installation, is subjected to slag off without being reduced. The slag is charged into an electric furnace. Into the electric furnace, further, a usual charge material consisting of scrap iron and, optionally, residual dust is charged. Additionally carbon and optionally silicon are added. During melting process, the chromium oxide, contained in the added slag, is directly reduced to the metallic chromium with the carbon and the silicon.