The effect of zinc cyanide on the flotation of gold from pyritic ore

Guo, Bao, Peng, Yongjun and Mai, Yuliang (2016) The effect of zinc cyanide on the flotation of gold from pyritic ore. Minerals Engineering, 85 106-111. doi:10.1016/j.mineng.2015.10.023


Author Guo, Bao
Peng, Yongjun
Mai, Yuliang
Title The effect of zinc cyanide on the flotation of gold from pyritic ore
Journal name Minerals Engineering   Check publisher's open access policy
ISSN 0892-6875
1872-9444
Publication date 2016-01-01
Year available 2015
Sub-type Article (original research)
DOI 10.1016/j.mineng.2015.10.023
Open Access Status Not Open Access
Volume 85
Start page 106
End page 111
Total pages 6
Place of publication Kidlington, Oxford United Kingdom
Publisher Pergamon Press
Language eng
Formatted abstract
In gold processing plants, the process water contains a considerable amount of weak acid dissociable (WAD) cyanide species. The cyanide-containing water recycled to flotation circuits has a deleterious effect on mineral flotation. Zinc cyanide can be a major constituent of the process water due to the cyanide leaching of zinc minerals and the zinc cementation applied to precipitate gold and silver. In the present study, the effect of zinc cyanide on the flotation of gold from a pyritic ore was evaluated and the competitive adsorption between zinc cyanide species and the collector, potassium amyl xanthate (PAX) or Aerophine promoter (3418A), on gold was studied by surface enhanced Raman spectroscopy (SERS). It was found that free cyanide did not depress the flotation of liberated gold, but zinc cyanide with a CN/Zn ratio of 2 did. The depression of gold flotation by zinc cyanide was due to the preferential adsorption of Zn(CN)2 on gold surface over either 3418A or amyl xanthate in the solution, rendering gold surface hydrophilic.
Keyword Zinc cyanide
Gold
Flotation
Collector
Raman spectroscopy
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2016 Collection
 
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