Extracting copper from copper oxide ore by a zwitterionic reagent and dissolution kinetics

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• 作者：Jiu-shuai Deng (1)
  Shu-ming Wen (1)
  Jian-ying Deng (1)
  Dan-dan Wu (1)
  
  1. State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization ; Faculty of Land Resource Engineering ; Kunming University of Science and Technology ; Kunming ; 650093 ; China
  
• 关键词：malachite ; copper ; extraction ; sulfamic acid ; dissolution ; kinetics
• 刊名：International Journal of Minerals, Metallurgy, and Materials
• 出版年：2015
• 出版时间：March 2015
• 年：2015
• 卷：22
• 期：3
• 页码：241-248
• 全文大小：2,042 KB
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• 刊物类别：Chemistry and Materials Science
• 刊物主题：Materials Science
  Metallic Materials
  Mineral Resources
  
• 出版者：Journal Publishing Center of University of Science and Technology Beijing, in co-publication with Sp
• ISSN：1869-103X

文摘

Sulfamic acid (SA), which possesses a zwitterionic structure, was applied as a leaching reagent for the first time for extracting copper from copper oxide ore. The effects of reaction time, temperature, particle size, reagent concentration, and stirring speed on this leaching were studied. The dissolution kinetics of malachite was illustrated with a three-dimensional diffusion model. A novel leaching effect of SA on malachite was eventually demonstrated. The leaching rate increased with decreasing particle size and increasing concentration, reaction temperature and stirring speed. The activation energy for SA leaching malachite was 33.23 kJ/mol. Furthermore, the effectiveness of SA as a new reagent for extracting copper from copper oxide ore was confirmed by experiment. This approach may provide a solution suitable for subsequent electrowinning. In addition, results reported herein may provide basic data that enable the leaching of other carbonate minerals of copper, zinc, cobalt and so on in an SA system.