STUDY OF MERRILL-CROWE PROCESSING .1. SOLUBILITY OF ZINC IN ALKALINE CYANIDE SOLUTION

Authors
CHI G FUERSTENAU MC MARSDEN JO
Citation
G. Chi et al., STUDY OF MERRILL-CROWE PROCESSING .1. SOLUBILITY OF ZINC IN ALKALINE CYANIDE SOLUTION, International journal of mineral processing, 49(3-4), 1997, pp. 171-183
Citations number
16
Categorie Soggetti
Mineralogy,"Mining & Mineral Processing","Engineering, Chemical
Journal title
International journal of mineral processing → ACNP
ISSN journal
03017516
Volume
49
Issue
3-4
Year of publication
1997
Pages
171 - 183
Database
ISI
SICI code
0301-7516(1997)49:3-4<171:SOMP.S>2.0.ZU;2-2
Abstract
A comprehensive study of zinc solubility was carried out in de-aerated alkaline cyanide solutions. Parameters investigated were: dissolved o xygen, cyanide and lead nitrate concentrations and pH. Zinc solubility increases significantly with increased dissolved oxygen and cyanide c oncentrations. Eh-pH diagrams have been developed and used to predict regions of stability of zinc hydroxide, which may inhibit gold precipi tation. The interaction between cyanide and hydroxyl ion activities to prevent the formation of zinc hydroxide is presented. With lead nitra te additions, maximum solubility of zinc occurs in the range of 10-15 mg/l lead nitrate. SEM photomicrographs of zinc particles in the prese nce of lead nitrate are presented.