Leaching kinetics of iron from coal-series kaolin by oxalic acid solutions

• Autorzy: Shao Hui , Ji Mengjiao , Yu Mingming

Identyfikatory

DOI

10.5277/ppmp19092

• Języki publikacji: EN

Abstrakty

EN

Removal of iron from coal-series kaolinite and its kinetics by chemical leaching were investigated in this paper. The optimal removal rate of iron reaches 29.09% (the content of Fe2O3 decreased from 0.55 to 0.39%) under the conditions of 100 °C, 0.4 M C2H2O4, and liquid-to-solid ratio of 4 cm3/g for 120 min. The leaching process was successfully described by the Avrami model and mainly controlled by internal diffusion control of shrinking core model, the apparent activation energy is 18.46 kJ/mol. The experimental results were consistent with the internal diffusion control of shrinking core model, improving acid concentration and leaching temperature could promotes the removal of iron from coal-series kaolin.

Słowa kluczowe

EN

coal-series kaolin; leaching kinetics; iron removal rate; oxalic acid

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2020
• Tom: Vol. 56, iss. 1
• Strony: 134--146
• Opis fizyczny: Bibliogr. 13 poz., rys., tab.

Twórcy

autor

Shao Hui

• School of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
• Hainan Branch, China Triumph International Engineering Co, Ltd, Haikou 570125, China

autor

Ji Mengjiao

• Hainan Branch, China Triumph International Engineering Co, Ltd, Haikou 570125, China

autor

Yu Mingming

• School of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).