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Recovering Zinc-lead Sulfide from a Geothermal Brine.
MISSING :10 pages
The Bureau of Mines devised a technique to recover a zn-pb concentrate from a geothermal brine. More than 99 pct of the zn and pb was precipitated by treating the brine with h2s and controlling the ph with lime. Recycle of the sulfide precipitates increased crystal size and resulted in easily filterable products. A typical sulfide precipitate contained 53 pct zns, 8 pct pbs, 24 pct mns, and 15 pct fes. Addition of sulfide as fes or cas was not effective in precipitating zn and pb, but zn in the brine was selectively removed with a strongly basic ion-exchange resin. A proposed flowsheet for metals recovery is discussed.
IH; Report of Investigations
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division