Copper extraction from chalcopyrite: Comparison of three non-sulfate oxidants, hypochlorous acid, sodium chlorate and potassium nitrate, with ferric sulfate
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- 作者：D.W. Shiers ; Denis.Shiers@csiro.au" class="auth_mail" title="E-mail the corresponding author ; D.M. Collinson ; N.J. Kelly ; H.R. Watling
- 关键词：Chalcopyrite ; Hypochlorous acid ; Chlorate ; Nitrate
- 刊名：Minerals Engineering
- 出版年：2016
- 出版时间：January 2016
- 年：2016
- 卷：85
- 期：Complete
- 页码：55-65
- 全文大小：797 K
文摘
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Three reagents, hypochlorous acid, chlorate and nitrate, were assessed for their ability to oxidise chalcopyrite.
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All systems tested offered improved rates of copper extraction relative to systems utilising ferric sulfate as an oxidant.
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Hypochlorous acid was the most aggressive oxidant trialled, with copper extraction reaching a plateau after 1–5 h.
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Optimal conditions utilising chlorate as an oxidant measured final extractions of 66–72% after 168 h.
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Optimal conditions utilising nitrate enabled a final extraction of 92% in systems using milled ore.