P204和P507从红土矿磷酸浸出液中萃取镍和钴

Pub Date : 2020-04-23 DOI:10.3390/met10040545

Ming-jun Rao, Tao Zhang, Guanghui Li, Qun Zhou, Jun Luo, Xin Zhang, Zhongping Zhu, Z. Peng, T. Jiang

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引用次数: 10

摘要

介绍了某褐铁矿的预焙烧-磷酸浸出-溶剂萃取工艺，重点研究了P204和P507从磷酸浸出液中萃取镍和钴的工艺。首先用氨水调节浸出液的pH值，通过沉淀降低Al3+和Fe3+的含量，然后用P204萃取进一步降低Al3+、Fe3+和Mn2+的含量。最后采用P507三段式萃取分离Ni2+和Co2+。萃取后，Co2+的萃取率为96.61%，Ni2+的萃取率为12.32%，实现了Ni2+和Co2+的选择性萃取。

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Solvent Extraction of Ni and Co from the Phosphoric Acid Leaching Solution of Laterite Ore by P204 and P507

An alternative process of pre-roasting, phosphoric acid leaching followed by solvent extraction of a limonitic laterite ore was described in this work, with emphasis on the solvent extraction of Ni and Co from the phosphoric acid leaching solution by P204 and P507. First, the pH value of the leaching solution was adjusted using ammonia to reduce the content of Al3+ and Fe3+ by precipitation, then the content of Al3+, Fe3+ and Mn2+ were further decreased by extraction using P204. At last, Ni2+ and Co2+ were separated by three-stage extraction using P507. After extraction, the extraction ratio of Co2+ was 96.61%, while that of Ni2+ was 12.32%, and the selective extraction of Ni2+ and Co2+ could be realized.

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