|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Pan American Materials Congress: Minerals Extraction and Processing
||PAN-49: Recovery of Zinc from Oxide–sulfide Zinc Ore through Oxidation and Chelation
||Kun Yang, Libo Zhang, Chao Lv, Shiwei Li, Jinhui Peng
|On-Site Speaker (Planned)
In this paper, three different processes are designed for leaching of oxide–sulfide zinc ore. Through calculating and comparing redox potentials, suitable oxidations are determined for each process. Meanwhile, effects of different added amount of various oxidants such as Na2O2，NaClO, and H2O2 et al., on zinc leaching are investigated. Results show that in a process of simultaneously oxidizing and chelating, zinc leaching degree can reach 83.72% with Na2O2 adding 0.3 mol/L, in the process of oxidizing first followed by chelating, optimum leaching rate of oxide–sulfide zinc ore is 92.40% with Na2O2 adding 0.5 mol/L, and in the process of acidification-oxidizing in the beginning, and followed by chelating, leaching degree of zinc reaches 93.02% (84.50%) under condition of NaClO (H2O2) added amount being 0.1 mol/L. Though the optimum leaching rate of zinc is slightly different, all three processes show their values.
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