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Recovery of zinc, copper, and lead-tin mixtures from brass smelter flue dusts.
Powell-HE; Fukubayashi-HH; Higley-LW Jr.; Smith-LL
NTIS: PB 210 190 :1-8
The smelting of brass and bronze generates a dust composed primarily of zinc oxide, with lesser amounts of other metal oxides, such as copper, lead, and tin. The small quantity of this waste generated by individual smelters and the relatively low unit value of the contained metals, suggests the desirability of reclaiming the metals onsite or at some nearby point. The Bureau of Mines has developed a process that fits these requirements. The technique consists of (1) dissolving zinc and copper from the dust with sulfuric acid, (2) recovery of copper by cementation, (3) recovery of zinc as zinc sulfate crystals, and (4) recovery of lead and tin as a salable residue. Alternatively, zinc may be recovered by electrodeposition. Free acid is recycled and no major pollution problems are generated by the process.
IH; Report of Investigation;
NTIS Accession No.
NTIS: PB 210 190
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division