Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 24    No. 1    January 2014

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Role of Sb(V) in removal of As, Sb and Bi impurities from copper electrolyte
Fa-xin XIAO1,2, Dao CAO1, Jian-wei MAO1, Xiao-ni SHEN1, Feng-zhang REN1

1. School of Materials Science and Engineering, Henan University of Science and Technology,
Luoyang 471003, China;
2. Henan Key Laboratory of Advanced Nonferrous Metal Materials, Henan University of Science and Technology, Luoyang 471003, China

Abstract:The function mechanism of Sb(V) in As, Sb and Bi impurities removal from copper electrolyte was investigated by adding Sb(V) ion in a synthetic copper electrolyte containing 45 g/L Cu2+, 185 g/L H2SO4, 10 g/L As and 0.5 g/L Bi. The electrolyte was filtered, and the precipitate structure, morphology and composition were characterized by chemical analysis, SEM, TEM, EDS, XRD and FTIR. The results show that the precipitate is in the shape of many irregular lumps with size of 50-200 μm, and it mainly consists of As, Sb, Bi and O elements. The main characteristic bands in the FTIR spectra of the precipitate are As—O—As, As—O—Sb, Sb—O—Bi, Sb—O—Sb and Bi—O—Bi. The precipitate is the mixture of microcrystalline of AsSbO4, BiSbO4 and Bi3SbO7 by XRD and electronic diffraction. The removal of As, Sb and Bi impurities by Sb(V) ion can be mainly ascribed to the formation of antimonate in copper electrolytes.

 

Key words: Sb(V); As; Bi; antimonate; copper electrolyte; removal; purification

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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