Abstract
Adaptive process was used to treat germanium-containing secondary zinc oxide. The leaching parameters were determined by batch experiment, and continuous experiment was conducted and the stability of the process was verified. The leaching efficiency of Zn and Ge in the batch experiments were 92.51 and 90.67%, respectively, while the leaching efficiencies of Zn and Ge in the continuous experiment were 93.53 and 88.47%, respectively. In the neutralization process, the Fe3+ concentration in the neutralized solution is within 0.025 g/L. The Fe2+in the leaching solution increased gradually, as the neutralized residue was returned to the leaching process, the Zn in leaching residue reduce and the leaching efficiency of Zn increased. The residue mainly contained zinc sulfide and lead sulfate, with some fluffy structures on the surface. The process is promising for industrial application from indicators, economy, and applicability.
Funding source: National Natural Science Foundation of China
Award Identifier / Grant number: 51664030
Award Identifier / Grant number: 51804146
Award Identifier / Grant number: 51964029
Funding source: National Key Research and development Plan Solid Waste Resources Special
Award Identifier / Grant number: 2018YFC1900402
Funding source: Applied Basic Research Project of Yunnan Province
Award Identifier / Grant number: 202001AT070079
Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research funding: This work was financially supported by the Natural Science Foundation of China (51664030, 51804146, 51964029), the National Key Research and Development Plan Solid Waste Resources Special (2018YFC1900402), and Applied Basic Research Project of Yunnan Province in China (No. 202001AT070079).
Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
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