Leaching behavior of metals from chlorinated limonitic nickel laterite

The leaching behavior of metals from pre-reduced limonitic nickel laterite was studied using a selective chlorination–leaching process with ferrous chloride tetrahydrate as chloride agent. The effects of parameters in selective chlorination and leaching process were investigated. It was found that t...

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Bibliographic Details
Published in:International journal of mineral processing 2012-07, Vol.110-111, p.117-120
Main Authors: Fan, Chuanlin, Zhai, Xiujing, Fu, Yan, Chang, Yongfeng, Li, Binchuan, Zhang, Ting-an
Format: Article
Language:English
Subjects:
Ferrous chloride
Leaching
Nickel laterite
pH value
Selective chlorination
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Summary:The leaching behavior of metals from pre-reduced limonitic nickel laterite was studied using a selective chlorination–leaching process with ferrous chloride tetrahydrate as chloride agent. The effects of parameters in selective chlorination and leaching process were investigated. It was found that the optimum conditions for selective chlorination were chloride agent addition of 40wt.% and time of 150min at 460°C. Liquid/solid ratio in leaching process, leaching time and temperature had little influence on metal extraction. As the initial pH value of leaching solution decreased from 6.85 to 1.00, the extractions of Fe, Ni, Co, Al, Cr and Mn increased slightly while that of Mg increased from 36.98% to 43.23%. Under the determined conditions, 91.78% Ni, 87.64% Co,
ISSN:0301-7516
1879-3525
DOI:10.1016/j.minpro.2012.04.002