process for the reduction of the content of iron and sulfur in the slag of blast furnace and slag raf finata obtained useful, in particular, for the production of glass ceramics and the like

摘要

1428154 Treating slags CALUMITE CO 11 Sept 1973 [12 Sept 1972] 42637/73 Headings C1K C1A and C1M Slag, -12 U.S. mesh size, is heated to at least 400‹ F. but below fusion in the presence of air and whilst being agitated to reduce its sulphur content, preferably to below 0À3%. Its iron content can also be reduced by simultaneously or successively adding a chlorine liberating compound. The product can be mixed with glass forming materials or sand with either recycled glass or gypsum to give a flint glass. The SO 2 formed in producing the slag can be introduced into the glass melt during glass making.