Study on leaching kinetics of laterite ore using hydrochloric acid

• Autorzy: Li Jinhui , Xu Zhifeng , Wang Ruixiang , Gao Yang , Yang Yang

Identyfikatory

DOI

10.5277/ppmp18189

• Języki publikacji: EN

Abstrakty

EN

The process of atmosphere-pressure acid leaching of laterites has attracted considerable attention in the nickel industry in recent years. However, the leaching kinetics of laterite using hydrochloride acid has not yet been fully researched. In this paper, the mineral analysis of the ore was carried out, and the leaching mechanism of different minerals at different time was studied comprehensively. The kinetics analysis of the leaching process of nickel, cobalt and manganese showed that the kinetics model of diffusion controlling was suitable and could be described by the linear equation, 1-3(1-a)2/3+2(1-a)=k2t. Based on the linear equation and the Arrhenius equation, the values of activation energy of metal leaching can be deduced (11.56 kJ/mol for nickel, 11.26 kJ/mol for cobalt and 10.77 kJ/mol for manganese). Study of leaching mechanism shows that the order of these minerals dissolution is: goethite, lizardite, magnetite and hematite. Due to the original or product of silica, magnetite, hematite and talc, they can form the solid film which hinders the leaching of valuable metals. Thus, the diffusion controlling step is inner diffusion, namely solid film diffusion controlling.

Słowa kluczowe

EN

nickel laterite; hydrochloride acid; kinetics analysis; hydrometallurgy; leaching mechanism

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2019
• Tom: Vol. 55, iss. 3
• Strony: 711--720
• Opis fizyczny: Bibliogr. 19 poz., rys.

Twórcy

autor

Li Jinhui

• Jiangxi University of Science and Technology, Hongqi Avenue 86, 341000 Ganzhou, China

autor

Xu Zhifeng

• Jiangxi University of Science and Technology

autor

Wang Ruixiang

• Jiangxi University of Science and Technology

autor

Gao Yang

• Jiangxi University of Science and Technology

autor

Yang Yang

• Jiangxi University of Science and Technology

Bibliografia

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