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| OXIDATIVE PRECIPITION OF IRON AND MANGANESE WITH SO2/O2 AND SEPARATION FROM LOW COBALT SOLUTION |
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Received:July 05, 2011
Published Online:January 04, 2012
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| DOI：10.3969/j.issn.1005-7854.2011.04.014 |
| KeyWord:nickel；cobalt；sulphur dioxide；elimination of iron；elimination of manganese |
| Author | Institution |
| YIN Fei |
Beijing General Research Institute of Mining and Metallurgy，Beijing ，China |
| WANG Zhen-wen |
Beijing General Research Institute of Mining and Metallurgy，Beijing ，China |
| RUAN Shu-feng |
Beijing General Research Institute of Mining and Metallurgy，Beijing ，China |
| LI Qiang |
Beijing General Research Institute of Mining and Metallurgy，Beijing ，China |
| WANG Cheng-yan |
Beijing General Research Institute of Mining and Metallurgy，Beijing ，China |
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| Abstract: |
| Through the analysis of processes of iron removal from low cobalt solution, a process of iron and manganese removal by oxidation of SO2/O2 (or air) mixture and neutralizing is proposed. The results show that it is possible to remove the iron, but difficult to remove manganese totally. Under the condition of 30℃, a SO2 1.5 vol% and air mixture feeding rate of 45.43 m3/ (h ? m3 liquor), reaction time of 2h and pH value around 3.5, the iron concentration of the residual liquid is less than 0.005g/L, which means a 99.7% removal of iron is achieved, however the removal ratio of manganese is only 37.5%. Then the residual liquid is further neutralized to pH 4.0-4.5, and the aluminium is reduced to 0.03g/L. Total precipitation rate of nickel and cobalt are 0.87% and 1.24%, respectively throughout the whole process. |
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