Mechanism of Precipitate Removal of Arsenic and Bismuth Impurities from Copper Electrolyte by Antimony

Abstract:

This paper aims to discover the mechanism of removal of arsenic and bismuth from copper electrolyte under the function of antimony. The precipitate was obtained from a synthetic copper electrolyte containing 185g/L sulfuric acid, 45g/LCu²⁺, 10g/LAs, 0.5g/LBi and 1.2g/LSb. The structure, morphology and component of the precipitate are clarified by methods of chemical analysis, SEM, XRD, TEM and IR spectroscopy. The precipitate consists of 27.08% arsenic, 15.12% antimony, 12.08% bismuth. There are many irregular blocks, and dendritic particles on the surface.The characteristic bands in the IR spectra of the precipitate are O–H, As–OH, As–O, As–OX (X=As, Sb, Bi), Sb–OH and O–As–O. The precipitate is a mixture of microcrystalline of BiSb₂O₇, Bi₁₂As₂O₂₃, SbAsO₄ and (Sb,As)₂O₃ by XRD and electronic diffraction. The impurities of As, Sb and Bi are removed from copper electrolyte by antimony attributing to these precipitate.

• Periodical: Advanced Materials Research (Volume 402)
• Pages: 51-56
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.402.51
• Online since: November 2011
• Authors: Fa Xin Xiao, Dao Cao, Jian Wei Mao, Xiao Ni Shen
• Keywords: Antimony, Arsenic, Bismuth, Copper Electrolyte, Mechanism, Removal, Self-Purification

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