Influence of montmorillonite hydration and delamination on coal flotation

• Autorzy: Zhang Lucheng , Zhang Mingqing , Liu Qi , Song Shuoshuo , Tian Yu , Barvora Joshua Bosco

Identyfikatory

DOI

10.37190/ppmp/153085

• Języki publikacji: EN

Abstrakty

EN

In this study, the influence of montmorillonite (MT) hydration and delamination on coal flotation was investigated through flotation tests using coal-MT mixtures. MT particles were subjected to hydration at different time intervals. The Fuerstenau upgrading curve was plotted to evaluate the change in overall flotation selectivity. The zeta potential and particle size distribution were used to characterize the delamination behavior of MT in deionized water at natural pH level. Atomic force microscopy (AFM) (colloidal probe) was used to analyze the interaction force between coal and MT particles. It was found that smaller particles (individual silicate layers or thin packets of layers) with higher zeta potentials appeared gradually, and their volume proportion increased with increasing hydration time. AFM results showed that a monotonous repulsive force was detected consistently throughout the separation distance between coal and these emerging smaller MT particles. The decrease of these MT coating on coal surface was responsible for the higher flotation recovery and better selectivity. A jump-into-contact phenomenon was observed in coal and MT interaction when MT hydrated incompletely. It showed that heterocoagulation between coal and MT occurred and MT coating on the coal surface was responsible for the depression of flotation.

Słowa kluczowe

EN

coal flotation; montmorillonite; hydration; delamination; slime coating

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2022
• Tom: Vol. 58, iss. 6
• Strony: art. no. 153085
• Opis fizyczny: Bibliogr. 16 poz., rys.

Twórcy

autor

Zhang Lucheng

• Engineering Research Center of Ministry of Education for Mine Ecological Restoration，China university of mining & technology, Xuzhou 221116, China
• School of Environmental Science & Spatial Infomatics, China University of Mining & Technology, Xuzhou 221116, China

autor

Zhang Mingqing

• Engineering Research Center of Ministry of Education for Mine Ecological Restoration，China university of mining & technology, Xuzhou 221116, China
• School of Environmental Science & Spatial Infomatics, China University of Mining & Technology, Xuzhou 221116, China

autor

Liu Qi

• School of Electrical and Power Engineering, China University of Mining & Technology, Xuzhou 221116, China

autor

Song Shuoshuo

• Engineering Research Center of Ministry of Education for Mine Ecological Restoration，China university of mining & technology, Xuzhou 221116, China

autor

Tian Yu

• Engineering Research Center of Ministry of Education for Mine Ecological Restoration，China university of mining & technology, Xuzhou 221116, China

autor

Barvora Joshua Bosco

• Engineering Research Center of Ministry of Education for Mine Ecological Restoration，China university of mining & technology, Xuzhou 221116, China

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).