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Hydrometallurgical Treatment of Arsenic-containing Lead-smelter Flue Dust.

Authors
Bloom-PA; Maysilles-JH; Dolezal-H
Source
MISSING :12 pages
Link
NIOSHTIC No.
10006374
Abstract
Arsenic-containing flue dusts are currently being stockpiled by several nonferrous smelters in the United States. These stockpiles are a source of environmental concern since the dusts can be transported by wind and contain water-soluble arsenic. The stockpiles also represent an alternate source of metals. To provide a quality environment, the Bureau of Mines investigated a process to make environmentally acceptable the discard of arsenic obtained from the treatment of arsenical flue dust. The process includes (1) leaching arsenic from a lead smelter copper dross flue dust, (2) fixing arsenic as an insoluble compound, and (3) recovering other metal values. Overall results of acid-leaching tests on lead- smelter flue dusts showed that h2so4 dissolved 80 to 90 percent of the as, zn, and cd, and up to 86 percent of the in. PB, ag, and au remain in the residue, which can be recycled to the smelter. Indium was recovered from the strong acid leach solution by solvent extraction; arsenic was fixed in a stable form by precipitation with fe2(so4)3 and cao or caco3.
Publication Date
19820101
Document Type
IH; Report of Investigations
Fiscal Year
1982
NTIS Accession No.
NTIS Price
Identifying No.
RI 8679
NIOSH Division
SLRC;
Source Name
MISSING
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