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Staged Heap Leaching-direct Electrowinning.

Authors
Eisele-JA; Elges-CH; Wroblewski-MD; McClelland-GE
Source
1st Int'l Symp Recovery of Precious Metals Freeman Publ San Francisco California 1984 :9 pages
Link
NIOSHTIC No.
10004123
Abstract
The federal Bureau of Mines, Reno Research Center, is conducting research to develop a staged agglomeration-heap leaching system and to electrowin the dissolved precious metals from the pregnant leaching solution. For direct electrowinning to be successful, the pregnant solutions generated during the initial stages of leaching must be higher grade than obtained by conventional heap leaching. The precious metal concentration of the pregnant solution can be increased by agglomeration pretreatment with cyanide solution that starts the leaching process during the curing period, by leaching with small volumes of solution, and by cycling the leaching solution through more than one heap in a staged manner. The resulting pregnant solution is passed directly through an electrowinning circuit. The barren solution from electrowinning is recycled to the leaching circuit. Bench-scale research on the development of the staged leaching system and on the development of an efficient electrowinning cell is described.
Publication Date
19840101
Document Type
OP;
Fiscal Year
1984
NTIS Accession No.
NTIS Price
Identifying No.
OP 120-84
Source Name
1st Int'l Symp. Recovery of Precious Metals. Freeman Publ., San Francisco, California, 1984, PP.21-29
State
CA;
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