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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 5    No. 3    September 1995

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OXIDATION OF GALENA IN AMMONIUM CARBONATE SOLUTION AND APPLIED REACTOR
Gong Qian; Gong Yajun; Cao Changlin; Lu Keyuan

Institute of Chemical Metallurgy; Chinese Academy of Sciences; Beijing 100080

Abstract:Anodic behaviour of galena in ammonium carbonate solution and products of anodic reaction resulting in passivation have been studied by electrochemical technologies including rotating ringdisc electrode etc. and physical detects. The effects of impurities in galena such as pyrite, pyrrhotite on converting galena to lead carbonate have been explained. The conversion rate can be accelerated by addition of some cupric ions to the ammonium carbonate solution and can be expressed by a = Klogt + B.The optimum reactor suitable for the conversion is a propeller agitation reactor without baffles, which has been proved in enlarged experiments with the reactor charged 50 kg ore.

 

Key words: galena; carbonate; reactor

ISSN 1672-7029
CN 43-1423/U

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