Hydrometallurgical Process for the Recovery of Lead from a Mixed Lead-zinc Sulfide Concentrate.
Paper in Epd Congress 91 TMS 1991 :219-237
The U.S. Bureau of Mines has developed a process for the selective recovery of lead metal from a mixed lead-zinc concentrate. The concentrate was leached in recycled h2sif6 at atmospheric pressure and 95 deg c with a redox potential of 570 mv (eh). Eighty-five pct of the lead was selectively leached from the concentrate, while 87 pct of the zinc remained in the residue. Pressure leaching of the concentrate was slightly less successful, with 78 pct of the lead leaching from the concentrate and 80 pct of the zinc remaining in the residue. Pure lead metal was successfully electrowon from a purified pbsif6-h2sif6 solution with 96-pct current efficiency and 0.69-Kw.H/kg energy consumption.
Paper in Epd Congress 91; TMS, 1991, PP. 219-237