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| Zhang Wenjie3,4, Li Jun4, Zuo Zhuang4, Du Yunpeng*1,2, Wu Wenwei1,2, Wu Mina1,2, Li Lina1,21. Yunnan Academy of Eco-Environmental Sciences, Kunming |
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Received:October 04, 2023
Revised:October 16, 2023
Accepted:October 24, 2023
Published Online:March 24, 2025
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| DOI： |
| KeyWord:Laterite nickel ore; Wastewater; Manganese carbonate; Precipitation; Comprehensive utilization |
| Author | Institution |
| WU Wenwei |
Yunnan Academy of Ecological and Environmental Sciences |
| Du Yunpeng |
Yunnan Academy of Ecological and Environmental Sciences |
| zhangwenjie |
Central South University |
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| Abstract: |
| The lateritic nickel ore hydrometallurgy process is widely used in industrial production, accompanied by a large amount of waste liquid containing valuable metals such as Mn2+, Ca2+, Mg2+, etc. Selective recovery of valuable metals in it can not only improve economic benefits, can also reduce the difficulty of wastewater treatment. Using CO2 produced in the production line as the carbon source and NaOH as the regulator, under the conditions of 10% NaOH concentration, 15 min reaction time, and liquid phase pH=6.6, it can selectively recover and prepare coarse-grade manganese carbonate, and the content of Mn in the product is 41%. , the content of Ca is 2.5%, and the content of manganese is 0.8%. The subsequent lean solution can be adjusted to pH 10 with 0.5 mol/L sodium carbonate solution, and the Mg2+ in the liquid phase can be recovered. This recycling process can improve the economic benefits of the production line, reduce the carbon emissions of the hydrometallurgy process, and has a high green and economic application prospect. |
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