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International Journal of Cast Metals Research Volume 36, 2023 - Issue 1-3
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Research Article

Study on the extraction of poor scandium from low-grade rare earth ores

Xiaojun Yanga Evaluation and Utilization of Strategic RareMetals and Rare Earth Resource Key Laboratory of Sichuan Province, Chengdu Analytical & Testing Center, Sichuan Bureau of Geology & Mineral Resources (Chengdu Mineral Resources Supervision and Testing Center, Ministry of Land and Resources), Chengdu, China;b Sichuan Bureau of Geology and Mineral Resources Chengdu Analytical & Testing Center for Mineral and Rocks, Chengdu, China
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Xunmei Zhuc College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, Sichuan, China
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Guoliang Yinc College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, Sichuan, China
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Kun Zhouc College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, Sichuan, ChinaCorrespondence[email protected]
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Zhenhua Fenga Evaluation and Utilization of Strategic RareMetals and Rare Earth Resource Key Laboratory of Sichuan Province, Chengdu Analytical & Testing Center, Sichuan Bureau of Geology & Mineral Resources (Chengdu Mineral Resources Supervision and Testing Center, Ministry of Land and Resources), Chengdu, China;b Sichuan Bureau of Geology and Mineral Resources Chengdu Analytical & Testing Center for Mineral and Rocks, Chengdu, China
&
Kun Zhua Evaluation and Utilization of Strategic RareMetals and Rare Earth Resource Key Laboratory of Sichuan Province, Chengdu Analytical & Testing Center, Sichuan Bureau of Geology & Mineral Resources (Chengdu Mineral Resources Supervision and Testing Center, Ministry of Land and Resources), Chengdu, China;b Sichuan Bureau of Geology and Mineral Resources Chengdu Analytical & Testing Center for Mineral and Rocks, Chengdu, China
Pages 36-44 | Received 10 Oct 2022, Accepted 30 Mar 2023, Published online: 07 Apr 2023
 
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ABSTRACT

Based on the analysis of chemical composition and the phase of scandium-containing clay type rare earth ore in a place in China, it is found that the content of scandium in the ore is 18.55 g/t. Due to the low leaching rate of direct acid leaching, the effect of the roasting process on the leaching rate of scandium from the raw ore was investigated. By comparing the operation of the two leaching processes, oxidised roasting-hydrochloric acid leaching and alkali roasting-hydrochloric acid leaching, we obtain the optimal technical conditions for both leaching processes. At the same time, the mechanism of alkali roasting was investigated and the conclusions obtained are of some reference for the extraction of scandium from low-grade rare earth ores.

Disclosure statement

No potential conflict of interest was reported by the authors.

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