Copper ions can catalyze reduction of manganese dioxide by carbon monoxide in ammonia solution. The paper studied on the reduction ammonia leaching process of ocean Co-Mn polymetallic ores, such as the polymetallic nodules and the cobalt-rich crust. The self-catalysis reduction ammonia leaching was carried out, in which the copper ion leached out of the raw materials, the Co-Mn polymetallic ores, was taken as the catalyst and CO as the reducing agent. The concentration of copper in the leaching solution has great effect on the oxidation-reduction reaction rate, and the reaction rate is very fast when the concentration of copper is more than 8g/L. By a suitable mixture ratio of polymetallic nodules to cobalt-rich crusts, the self-catalysis reduction ammonia leaching could be realized. At the condition that polymetallic nodules to cobalt-rich crust 3:1, temperature 45° C and the leaching solution with more than Cu 9g/L, Ni 13g/L, and Co 3.5g/L, the average leaching extractions of nickel, cobalt and copper are 94%, 86% and 93% respectively in continuous leaching process.
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Tenth ISOPE Ocean Mining and Gas Hydrates Symposium
September 22–26, 2013
Szczecin, Poland
ISBN:
978-1-880653-92-0
Study on Self-Catalysis Reduction Leaching of Ocean Co-Mn Polymetallic Ores in Ammonia Solution
Kaixi Jiang;
Kaixi Jiang
Beijing General Research Institute of Mining & Metallurgy
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Xunxiong Jiang;
Xunxiong Jiang
Beijing General Research Institute of Mining & Metallurgy
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Linyong Feng;
Linyong Feng
Beijing General Research Institute of Mining & Metallurgy
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Wei Jiang;
Wei Jiang
Beijing General Research Institute of Mining & Metallurgy
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Shengdong Wang;
Shengdong Wang
Beijing General Research Institute of Mining & Metallurgy
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Lei Zhao;
Lei Zhao
Beijing General Research Institute of Mining & Metallurgy
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Yanqing Fan
Yanqing Fan
Beijing General Research Institute of Mining & Metallurgy
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Paper presented at the Tenth ISOPE Ocean Mining and Gas Hydrates Symposium, Szczecin, Poland, September 2013.
Paper Number:
ISOPE-M-13-071
Published:
September 22 2013
Citation
Jiang, Kaixi , Jiang, Xunxiong , Feng, Linyong , Jiang, Wei , Wang, Shengdong , Zhao, Lei , and Yanqing Fan. "Study on Self-Catalysis Reduction Leaching of Ocean Co-Mn Polymetallic Ores in Ammonia Solution." Paper presented at the Tenth ISOPE Ocean Mining and Gas Hydrates Symposium, Szczecin, Poland, September 2013.
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