Procedure, for recovering lead and zinc from electrical steelworks, powder and recycling of residue, involves pyrotechnic procedure based on those applied for zinc minerals

摘要

Recovery of lead and zinc from electrical steelworks powder and recycling of residue involves pyrotechnic procedure based on those applied for zinc minerals. Reduction is effected by carbon of the oxides of zinc and lead and separation by volatization of the two metals. Once the greater part of the zinc and lead has been eliminated from the powders, the residue can be returned to the steel works. The procedure uses an excess of coke above the stoichiometry necessary for the reduction of the oxides and the heating of the load. The high volume of gases produced can be eliminated by evaporation.