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- ALTANSUKH Batnasan
- Graduate School of Engineering and Resource Science, Akita University
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- HAGA Kazutoshi
- Graduate School of Engineering and Resource Science, Akita University
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- SHIBAYAMA Atsushi
- Graduate School of Engineering and Resource Science, Akita University Faculty of International Resource Science, Akita University
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This study focused on the development of hydrometallurgical process which allows the nickel (Ni) and cobalt (Co) recovery from a low grade laterite ore. The developed process consists of two main stages: leaching and precipitation. In the first stage, an appropriate leach liquor which contains a relatively high nickel and cobalt concentration is prepared by chemical leaching and pressure leaching followed by separation steps, respectively. The effects of sulfuric acid concentration, leaching temperature and time, internal pressure in an autoclave on the efficient leaching of Ni and Co from a laterite ore were presented. In the next stage, the Ni and Co ions present in the liquor are co-precipitated as sulfides by sulfuration with sodium hydrosulfide (pH 3.8). It was found that talc (Mg3Si4O10(OH)2), goethite (FeOOH) and quartz (SiO2) are main minerals of the laterite ore which contains 48.12% Fe, 1.8% Al, 0.95% Ni, 0.07% Co, 0.29% Cr and 0.15% Mg. The high efficiency of pressure leaching for Ni and Co from the low grade laterite ore was revealed by comparing the chemical leaching results. The vast majority of Co (>97%) and Ni (55%) from the purified liquor resulting after neutralization with calcium carbonate (CaCO3) was precipitated as mixed-sulfides by adjusting the NaHS/(Co + Ni) ratio to 3 by the addition of sulfuration agent (NaHS) at the solution pH of 3.8. Based on the experimental results, the efficient recovery of cobalt (Co) and nickel (Ni) from the low grade laterite ore can be achieved using the pressure leaching and neutralization treatment followed by sulfuration.
収録刊行物
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- 環境資源工学
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環境資源工学 61 (2), 100-109, 2014
一般社団法人 環境資源工学会
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詳細情報 詳細情報について
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- CRID
- 1390001205208478848
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- NII論文ID
- 130004938620
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- NII書誌ID
- AA11907992
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- ISSN
- 13499262
- 13486012
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- NDL書誌ID
- 025604392
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可