Journal of Central South University

, Volume 24, Issue 5, pp 1082–1089 | Cite as

Comprehensive recovery of Fe, Zn, Ag and In from high iron-bearing zinc calcine

  • Bing Peng (彭兵)
  • Ning Peng (彭宁)
  • Hui Liu (刘恢)
  • Ke Xue (薛珂)
  • Dong-hong Lin (林冬红)
Article
  • 41 Downloads

Abstract

A beneficiation-metallurgy combination process is developed to recover Zn, Fe and to enrich In, Ag from high iron-bearing zinc calcine based on our former researches. In gaseous reductive roasting process, the roasting conditions were tested by magnetic separation of roasted product. It is found that the \({V_{CO}}\left( {{{{P_{CO}}} \mathord{\left/ {\vphantom {{{P_{CO}}} {{P_{CO + C{O_2}}}}}} \right. \kern-\nulldelimiterspace} {{P_{CO + C{O_2}}}}}} \right)\) in roasting atmosphere should be maintained below 30% to avoid the generation of zinc iron solid solution (Fe0.85-x Zn x O), which can bring a decrease of iron recovery in magnetic separation. After roasting, acid leaching and multistage magnetic separation are carried out for the recovery of Zn, Fe and enrichment of Ag and In. About 90% of zinc is extracted and 83% of iron is recovered in the whole process. The Ag mainly enters the tailings with a recovery of 76%, the Ag grade increases from 0.12 g/t in raw materials to 1.18 g/t in the tailings. However, the In mainly enters the iron concentrations and the recovery reaches 86%. This process was proved to be technically feasible and may be a favorable option in the treatment of high iron-bearing zinc material with high Ag or In content.

Key words

high iron-bearing zinc calcine reductive roasting multistage magnetic separation silver recovery indium recovery 

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Copyright information

© Central South University Press and Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  • Bing Peng (彭兵)
    • 1
    • 2
  • Ning Peng (彭宁)
    • 1
  • Hui Liu (刘恢)
    • 1
    • 2
  • Ke Xue (薛珂)
    • 1
  • Dong-hong Lin (林冬红)
    • 1
  1. 1.Institute of Environmental Science and Engineering, School of Metallurgical Science and EngineeringCentral South UniversityChangshaChina
  2. 2.Chinese National Engineering Research Centre for Control & Treatment of Heavy Metal PollutionChangshaChina

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