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| Extraction of Ni and Co from Laterite-Nickel Ores with Sulfating and Oxidizing Roasting-Water Leaching Process |
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Received:December 24, 2012
Revised:December 25, 2012
Accepted:December 26, 2012
Published Online:June 19, 2013
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| DOI：10.3969/j.issn.1007-7545.2013.07.002 |
| KeyWord:laterite-nickel ore; sulfating roasting; oxidizing roasting; leaching; nickel; cobalt |
| Author | Institution |
| TONG Wei-feng |
昆明贵金属研究所 |
| FAN Xing-xiang |
昆明贵金属研究所 |
| WU Xiao-feng |
昆明贵金属研究所 |
| ZHAO Jiachun |
昆明贵金属研究所 |
| LI Bo-jie |
昆明贵金属研究所 |
| WU Yue-dong |
昆明贵金属研究所 |
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| Abstract: |
| Nickel and cobalt were extracted from laterite-nickel ores containing high iron and low magnesium by “sulfating roasting-oxidizing roasting-water leaching” process. The effects of sulfuric acid consumption, time and temperature of sulfating roasting and oxidizing roasting, leaching time, ratio of liquid to solid (L/S) were investigated. The results show that the leaching rate of Ni, Co and Fe are 91.00%, 91.51%, and 2.72%, respectively, under the following optimum conditions including particle size of -1 mm, acid-ore ratio of 0.54, sulfating roasting at 300 ℃ for 1 hour, oxidizing roasting at 800 ℃ for 2 hours, water leaching at 70 ℃ for 2 hours with L/S of 3∶1. |
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