PROCEDURE FOR EXTRACTION OF ALUMINIUM AND IRON FROM ASH-AND-SLAG WASTE

摘要

FIELD: metallurgy. ^ SUBSTANCE: procedure for extraction of aluminium and iron from ash-and-slag waste consists in treatment with solution of sulphuric acid and in extraction of aluminium containing components into solution. Before extraction of aluminium containing components into solution waste is subjected to classification and multi-stage magnetic separation at periodic increase of field of magnetic induction for complete extraction of magnetic fraction containing iron. ^ EFFECT: raised efficiency of extraction of aluminium and iron from ash-and-slag material, reduced expenditures for reagent treatment of material. ^ 1 dwg, 2 tbl