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| Selective Leaching of Magnesium from Nickel Sulfide Concentrate |
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Received:December 18, 2012
Revised:December 19, 2012
Accepted:December 19, 2012
Published Online:June 19, 2013
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| DOI：10.3969/j.issn.1007-7545.2013.07.006 |
| KeyWord:nickel sulfide concentrate; acidic leaching; de-magnesium; leaching rate; sodium sulfide; Ni; Cu; Co |
| Author | Institution |
| LU Sujun |
金川镍钴研究设计院 |
| YANG Fenjuan |
金川镍钴研究设计院 |
| MA Tianfei |
金川镍钴研究设计院 |
| DOU Yinli |
金川镍钴研究设计院 |
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| Abstract: |
| High magnesium bearing nickel sulfide concentrate was selectively leached by sulfuric acid. The effects of dosage of sulfuric acid, ratio of liquid to solid (L/S), reaction time and temperature on leaching rate were investigated. The results show that the leaching rate of nickel, copper, and cobalt is 6.61%, 6.67% and 6.84%, respectively, and the MgO content is reduced from 10.80% to 5.57% under the optimum conditions including dosage of sulfuric acid of 150 mL for one kilogram concentrate, L/S of 1∶1, and leaching time of 0.5 h at room temperature. The smelting calorific value of de-magnesium nickel sulfide concentrate is less than 2 017 MJ/t. The concentration of nickel and copper in lixivium is reduced to 5.2 mg/L and 0.6 mg/L respectively after adding of sodium sulfide. |
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