PRACTICAL APPLICATION OF POTENTIAL-PH DIAGRAMS FOR AU-CS(NH2)(2)-H2O AND AG-CS(NH2)(2)-H2O SYSTEMS FOR LEACHING GOLD AND SILVER WITH ACIDICTHIOUREA SOLUTION

Authors
GASPAR V MEJEROVICH AS MERETUKOV MA SCHMIEDL J
Citation
V. Gaspar et al., PRACTICAL APPLICATION OF POTENTIAL-PH DIAGRAMS FOR AU-CS(NH2)(2)-H2O AND AG-CS(NH2)(2)-H2O SYSTEMS FOR LEACHING GOLD AND SILVER WITH ACIDICTHIOUREA SOLUTION, Hydrometallurgy, 34(3), 1994, pp. 369-381
Citations number
16
Categorie Soggetti
Metallurgy & Mining
Journal title
Hydrometallurgy → ACNP
ISSN journal
0304386X
Volume
34
Issue
3
Year of publication
1994
Pages
369 - 381
Database
ISI
SICI code
0304-386X(1994)34:3<369:PAOPDF>2.0.ZU;2-2
Abstract
The possibility of gold and silver extraction from products obtained d uring treatment of copper anodic slimes has been investigated through the construction of potential-pH diagrams for Au-CS(NH2)(2)-H2O and Ag -CS(NH2)(2)-H2O systems. The effect of leach parameters such as thiour ea and ferric-ion concentrations in the solution and level of the redo x potential were considered. Optimum conditions for gold extraction of 99.8% are leach time of 1 h at the concentration of thiourea 10 g/L a nd concentration of ferric ion as oxidant 5.0 g/L. The redox potential connected with optimum leaching conditions was 500-523 mV (versus S.H .E.).