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| Selective Leaching of Nickel and Cobalt from Limonitic Laterite after Activation Pretreatment |
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Received:July 21, 2017
Revised:July 24, 2017
Accepted:July 25, 2017
Published Online:December 20, 2017
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| DOI：doi：10.3969/j.issn.1007-7545.2018.01.004 |
| KeyWord:limonitic laterite; water leaching; nickel; cobalt |
| Author | Institution |
| YANG Wei-jiao |
北京矿冶研究总院 |
| MA Bao-zhong |
北京矿冶研究总院 北京 |
| JIANG Xing-ming |
昆明理工大学冶金与能源工程学院 云南 昆明 |
| WANG Hua |
昆明理工大学冶金与能源工程学院 云南 昆明 |
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| Abstract: |
| Selective leaching of nickel and cobalt from limonitic laterite ores after activation pretreatment was studied. The effects of temperature, duration, L/S, stirring speed and sodium fluoride addition on metals extraction were investigated. Ni and Co extraction rate is 85.62% and 94.26% respectively under the optimum conditions including temperature of 85 ℃, duration of 3 h, L/S=5︰1(mL/g), stirring speed of 400 r/min, and NaF dosage of 4%. Iron comes into residue in form of sodium jarosite with leaching rate of only 2.43%. Selective leaching of nickel, cobalt and iron can be efficiently achieved by activation pretreatment of limonitic laterite ores. |
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