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Recovery of Tungsten from a Hydrothermally Altered Deposit.

Authors
Raddatz-AE; Gomes-JM; Sjoberg-JJ; Wong-MM
Source
MISSING :14 pages
Link
NIOSHTIC No.
10006408
Abstract
The Bureau of Mines is investigating methods for recovering tungsten from domestic resources. A calcine-quench-leach (cql) technique was developed for the extraction of tungsten from the Golconda, Nevada, hot springs ores. The deposit contains disseminated tungsten that cannot be beneficiated by conventional techniques and must be treated by hydrometallurgical methods. The cql procedure consists of calcining the ore at 900 deg c for 3 hours, quenching in a solution containing 1.5 Parts of na2co3 and 1.5 Parts of naoh per part of wo3 in the ore and at a solution-to-ore ratio of 3 to 1, leaching at 200 deg and at 250 psig for 3 hours, and filtering and washing the residue. A series of closed-circuit batch tests showed that 92 pct of the tungsten was extracted from a sample containing 2.32 wt-pct wo3. The pregnant solution contained 11 g/l wo3.
Publication Date
19820101
Document Type
IH; Report of Investigations
Fiscal Year
1982
NTIS Accession No.
NTIS Price
Identifying No.
RI 8720
NIOSH Division
RERC;
Source Name
MISSING
State
NV;
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