Sulfidation Roasting of Hemimorphite with Pyrite for the Enrichment of Zn and Pb

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• 作者：Xiao-Bo Min ; Ke Xue ; Yong Ke ; Bo-Sheng Zhou ; Yang-Wen-Jun Li ; Qing-Wei Wang
• 刊名：JOM Journal of the Minerals, Metals and Materials Society
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：68
• 期：9
• 页码：2435-2442
• 全文大小：1,200 KB
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• 作者单位：Xiao-Bo Min (1) (2)
  Ke Xue (1)
  Yong Ke (1)
  Bo-Sheng Zhou (1)
  Yang-Wen-Jun Li (1)
  Qing-Wei Wang (1) (2)
  
  1. Institute of Environmental Science & Engineering, School of Metallurgy and Environment, Central South University, Changsha, 410083, Hunan, China
  2. Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha, 410083, Hunan, China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Materials Science
  Metallic Materials
  Nanotechnology
  Crystallography
  
• 出版者：Springer Boston
• ISSN：1543-1851
• 卷排序：68

文摘

With the increasing consumption of zinc and the depletion of zinc sulfide ores, the exploitation of low-grade zinc oxide ores may be important for the sustainability of the zinc industry. Hemimorphite, a zinc hydroxyl silicate hydrate, is a significant source of Zn and Pb. It is difficult to obtain Zn and Pb from the hemimorphite using traditional technology. In this work, for the first time, sulfidation roasting of hemimorphite with pyrite was studied for the enrichment of Zn and Pb by a flotation process. Four stages of sulfidation roasting were determined based on x-ray diffraction and thermogravimetry analysis. Then, the effects of sulfidation temperature, pyrite dosage and reaction time on the sulfidation percentages were investigated at the laboratory scale. The experimental results showed that the sulfidation percentages of Pb and Zn were as high as 98.08% and 90.55% under optimum conditions, respectively. Finally, a flotation test was performed to enrich Zn and Pb in the sulfidation product. A flotation concentrate with 8.78% Zn and 9.25% Pb was obtained, and the recovery of Zn and Pb reached 56.14% and 75.94%, respectively.