Extraction and separation of nickel and cobalt from saprolite laterite ore by microwave-assisted hydrothermal leaching and chemical deposition

Yan Zhao; Jian-ming Gao; Yi Yue; Ben Peng; Zai-qing Que; Min Guo; Mei Zhang

doi:10.1007/s12613-013-0774-8

Volume 20 Issue 7

Jul. 2013

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International Journal of Minerals, Metallurgy and Materials > 2013 > 20(7): 612-619. > DOI: 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://dx.doi.org/10.1007/s12613-013-0774-8

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Extraction and separation of nickel and cobalt from saprolite laterite ore by microwave-assisted hydrothermal leaching and chemical deposition

Yan Zhao¹⁾,
Jian-ming Gao¹⁾,
Yi Yue¹⁾,
Ben Peng^1,2),
Zai-qing Que¹⁾,
Min Guo^1), , and
Mei Zhang¹⁾

Author Affilications

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

Funds:

the New Century Excellent Researcher Award Program from the Ministry of Education of China (No. NCET-08-0732)

supported by the National Natural Science Foundation of China (Nos. 51272025, 50872011 and 51072022)

the National Basic Research Program of China (No. 2007CB613608)

Received: 01 August 2012; Revised: 25 October 2012; Accepted: 04 November 2012; Available Online: 10 June 2021

Graphical Abstract

Abstract

Abstract

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.
- laterites,
- hydrometallurgy,
- nickel metallurgy,
- cobalt metallurgy,
- microwave heating,
- leaching,
- chemical deposition

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