Återvinning av icke-järnmetall ur slagg

摘要

PCT No. PCT/SE92/00111 Sec. 371 Date Oct. 19, 1994 Sec. 102(e) Date Oct. 19, 1994 PCT Filed Feb. 25, 1992 PCT Pub. No. WO93/17135 PCT Pub. Date Sep. 2, 1993.A method for recovering non-ferrous metal from a dross that includes the non-ferrous metal includes introducing the dross into a rotary furnace or rotatable converter. The furnace or converter has a refractory lining. Oxygen and a fossil fuel are supplied to an oxy-fuel burner. The oxygen is supplied as a combustion gas including at least eighty percent oxygen. The oxygen and fossil fuel are combusted to generate an initial combustion energy. The dross is heated to a temperature above a melting point of the non-ferrous metal by supplying the initial combustion energy to the furnace or converter. The heating takes place in the absence of a protective salt layer. The non-ferrous metal and a non-metallic residue are recovered from the furnace or converter.