Thiocyanate solutions in gold technology

• Published in: Hydrometallurgy Vol. 64; no. 1; pp. 43 - 48
• Main Authors: Kholmogorov, A.G., Kononova, O.N., Pashkov, G.L., Kononov, Y.S.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-04-2002
• Subjects: Carbon adsorbents; Gold; Ion exchangers; Thiocarbamide; Thiocyanate solutions; Thiocyanate solutions; Gold; Carbon adsorbents; Ion exchangers; Thiocarbamide
• ISSN: 0304-386X; 1879-1158
• DOI: 10.1016/S0304-386X(02)00005-1

The scope for using KSCN solutions in the field of gold leaching from chemical preparation products of hard arsenopyrite concentrates is shown. More than 95% gold is recovered in weak acidic solutions (pH=2–5) at KSCN concentration 0.4 mol/L. The thiocyanate complexes are recovered on carbon adsorbents (BAU, UC, LKAU-4) as well as on ion exchangers (AV-17-10P, AP-100). The gold recovery degree is 99.2–99.8%. The desorption of gold from ion exchangers can be done by thiocarbamide solutions in H
2SO
4 at room temperature, and from carbon adsorbents by basic thiocarbamide solutions at ∼150 °C.