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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 12    No. 2    April 2002

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Technological condition in slurry electrolysis
of high-silver g alena concentrate
CHEN Ling(陈  凌)1,YANG Xian-wan(杨显万)1,
SI Yun-sen(司云森)2, ZHANG Ying-jie(张英杰)2

1.Faculty of Material and Metallurgy Engineering,
Kunming University of Science and Technology,
Kunming 650093, China;
2.Faculty of Science, Kunming University of Science and
Technology, Kunming 650093, China

Abstract:Effects of various technological conditions such as ρ(Cl-), ρ(Fe)T , pH value and temperature on the cell voltage, lead leaching rate and the cathodic current efficiency of the slurry electrolysis of high-silver galena concentrate were studied, and the behavior regularity of lead and silver was investigat ed. As a result, the suitable condition was determined as: ρ(Cl-)230g/L, ρ(Fe)T15g/L, pH 1, temperature 70℃, electrolysis time 6h. Under such condition, adopting the cathodic current density of 150A/m2 and the liquid-solid ratio of 15∶1, lead powder with a purity degree of 91.18% was got. At the same time, leaching rate of lead, leaching rate of silver and cathodic current efficiency amounted to 96.88%, 70.88% and 75.68% respectively.

 

Key words: slurry electrolysis; technological condition; galena

ISSN 1672-7029
CN 43-1423/U

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