Investigation of Acid Leaching of Vanadium Slag under the Atmospheric Pressure

Yuting Xiong; Ling Wang; Jianxin Liu; Lanbo Jia; Shuxian Liu; Yimiao Nie

doi:10.3969/j.issn.1000-6532.2023.03.006

Kuangchan zonghe liyong (Jun 2023)

Investigation of Acid Leaching of Vanadium Slag under the Atmospheric Pressure

Yuting Xiong,
Ling Wang,
Jianxin Liu,
Lanbo Jia,
Shuxian Liu,
Yimiao Nie

Affiliations

Yuting Xiong: Hebei Province Key Laboratory of Mining Exploitation and Security Technology, College of Mining Engineering, North China University of Science and Technology, Tangshan, Hebei, China
Ling Wang: Hebei Province Key Laboratory of Mining Exploitation and Security Technology, College of Mining Engineering, North China University of Science and Technology, Tangshan, Hebei, China
Jianxin Liu: Hebei Province Key Laboratory of Mining Exploitation and Security Technology, College of Mining Engineering, North China University of Science and Technology, Tangshan, Hebei, China
Lanbo Jia: Hebei Province Key Laboratory of Mining Exploitation and Security Technology, College of Mining Engineering, North China University of Science and Technology, Tangshan, Hebei, China
Shuxian Liu: Hebei Province Key Laboratory of Mining Exploitation and Security Technology, College of Mining Engineering, North China University of Science and Technology, Tangshan, Hebei, China
Yimiao Nie: Hebei Province Key Laboratory of Mining Exploitation and Security Technology, College of Mining Engineering, North China University of Science and Technology, Tangshan, Hebei, China

DOI: https://doi.org/10.3969/j.issn.1000-6532.2023.03.006
Journal volume & issue: Vol. 44, no. 3
pp. 31 – 37

Abstract

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This is a paper in the field of metallurgical engineering. The vanadium slag of a steel plant in Chengde, Hebei Province was used as the object of study. In view of the production of toxic and harmful gases of the current process of "sodium roasting-vanadium extractionby water leaching" of vanadium slag, low recovery of vanadium and the failure of comprehensive utilization of valuable metals. Based on the thermodynamic study of Fe-V-H2O system, the effects of grinding fineness, reaction temperature, sulfuric acid concentration, liquid-solid ratio, leaching reaction time and stirring speed on vanadium slag leaching were investigated under atmospheric condition. The results show that leaching temperature, sulfuric acid concentration and liquid-solid ratio have significant effects on vanadium slag leaching. Under the conditions of particle size of D95 for 16 μm, reaction temperature for 90 ℃, liquid-solid ratio for 8∶1, concentration of H2SO4 for 4 mol/L, leaching time for 8 h and stirring speed for 400 r·min-1, vanadium leaching rate is 86.33%. The amorphous SiO2 produced in the process of acid dissolution may cover the surface of incompletely dissolved mineral particles and hinder the further acid dissolution of them.

Published in Kuangchan zonghe liyong

ISSN: 1000-6532 (Print)
Publisher: Institute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological Sciences
Country of publisher: China
LCC subjects: Technology: Mining engineering. Metallurgy
Website: http://www.kczhly.com/indexen.htm

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