Ion exchange recovery of gold from iodine-iodide solutions

被引：26
作者：
Zhang, Hongguang [1 ]
Jeffery, Coby A. [1 ]
Jeffrey, Matthew I. [2 ]
机构：
[1] CSIRO, Proc Sci & Engn, Karawara, WA 6152, Australia
[2] Newmt Min Corp, Englewood, CO USA
来源：
HYDROMETALLURGY | 2012年 / 125卷
关键词：
Gold recovery; Ion exchange resin; Iodine; Iodide; Triiodide; DISSOLUTION; ADSORPTION; CARBON;
D O I：
10.1016/j.hydromet.2012.05.007
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The recovery of gold from iodine-iodide solutions using strong base anion exchange resin has been investigated. The gold iodide complex can be effectively loaded on the resin provided the resin is not heavily loaded with triiodide. The loading of triiodide is found to be extremely strong due to the dissociation of the loaded triiodide to iodide and iodine, the latter being deposited on the resin by physiosorption thereby fouling the surface. This may be potentially detrimental to the gold recovery process but can be overcome by pre-reduction to remove most of the triiodide before loading. To strip the iodine from the resin it requires a reductive elution process. A sodium chloride based eluant solution containing sulfite is found to be highly effective for the elution of both gold and iodine. (C) 2012 Elsevier B.V. All rights reserved.
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收藏
页码：69 / 75
页数：7
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