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A Study on Recovery of Gold from Decopperized Anode Slime
Author(s) -
Dönmez B.,
Sevim F.,
Çolak S.
Publication year - 2001
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/1521-4125(200101)24:1<91::aid-ceat91>3.0.co;2-a
Subject(s) - dissolution , cementation (geology) , chemistry , anode , solubility , copper , precipitation , hydrometallurgy , volumetric flow rate , aqueous solution , inorganic chemistry , metallurgy , materials science , chemical engineering , electrode , organic chemistry , thermodynamics , cement , physics , meteorology , engineering
A study was performed on the chlorination and cementation of gold from an anode slime. The gold from decopperized anode slime first was dissolved with chlorine gas in aqueous medium, later the dissolved gold was precipitated by using a rotational copper disc. The effects of reaction temperature, reaction period, stirring speed, solid‐liquid ratio and Cl 2 gas flow rate on the dissolution of gold were investigated. Increasing the solid‐liquid ratio decreases the dissolution, the solubility increases with increasing reaction temperature, reaction period and stirring speed. It was observed that the Cl 2 gas flow rate hasn't a significant effect on the dissolution. As to the precipitation of the gold in the solution, the effects of temperature and rotational speed were sought for. The experimental results showed that the gold recovery could be over 90 %. For the kinetics analysis of the cementation, the activation energy value was found to be 19.51 kJ·mol –1 .