Yan Zhao, Jian-ming Gao, Yi Yue, Ben Peng, Zai-qing Que, Min Guo, and Mei Zhang, Extraction and separation of nickel and cobalt from saprolite laterite ore by microwave-assisted hydrothermal leaching and chemical deposition, Int. J. Miner. Metall. Mater., 20(2013), No. 7, pp. 612-619. https://doi.org/10.1007/s12613-013-0774-8
Cite this article as:
Yan Zhao, Jian-ming Gao, Yi Yue, Ben Peng, Zai-qing Que, Min Guo, and Mei Zhang, Extraction and separation of nickel and cobalt from saprolite laterite ore by microwave-assisted hydrothermal leaching and chemical deposition, Int. J. Miner. Metall. Mater., 20(2013), No. 7, pp. 612-619. https://doi.org/10.1007/s12613-013-0774-8
Yan Zhao, Jian-ming Gao, Yi Yue, Ben Peng, Zai-qing Que, Min Guo, and Mei Zhang, Extraction and separation of nickel and cobalt from saprolite laterite ore by microwave-assisted hydrothermal leaching and chemical deposition, Int. J. Miner. Metall. Mater., 20(2013), No. 7, pp. 612-619. https://doi.org/10.1007/s12613-013-0774-8
Citation:
Yan Zhao, Jian-ming Gao, Yi Yue, Ben Peng, Zai-qing Que, Min Guo, and Mei Zhang, Extraction and separation of nickel and cobalt from saprolite laterite ore by microwave-assisted hydrothermal leaching and chemical deposition, Int. J. Miner. Metall. Mater., 20(2013), No. 7, pp. 612-619. https://doi.org/10.1007/s12613-013-0774-8
State Key Laboratory of Advanced Metallurgy, School of Metallurgical and Ecological Engineering, University of Science and Technology, Beijing, Beijing, 100083, China
China Metallurgical Group Corporation, Beijing, 100038, China
Extraction and separation of nickel and cobalt from saprolite laterite ore were studied by using a method of microwave-assisted hydrothermal leaching and chemical deposition. The effects of leaching temperature and time on the extraction efficiencies of Ni2+ and Co2+ were investigated in detail under microwave conditions. It is shown that the extraction efficiencies of Ni2+ and Co2+ from the ore pre-roasted at 300℃ for 5 h were 89.19% and 61.89% when the leaching temperature and time were about 70℃ and 60 min, respectively. For the separation process of Ni and Co, the separation of main chemical components was performed by adjusting the pH values of sulfuric leaching solutions using a NaOH solution based on the different pH values of precipitation for metal hydroxides. The final separation efficiencies of Ni and Co were 77.29% and 65.87%, respectively. Furthermore, the separation efficiencies of Fe of 95.36% and Mg of 92.2% were also achieved at the same time.
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