Effect of swelling clay dispersion type on fine coal flotation

• Autorzy: Zhang Mingqing , Yu Wei , Cao Yijun , Xu Haiyu

Identyfikatory

DOI

10.5277/ppmp18143

• Języki publikacji: EN

Abstrakty

EN

The influence of bentonite dispersion on fine coal flotation was examined to better understand the role of swelling clay in the process of flotation. It was found that the coal flotation recovery was lower with uncontrolled dispersion of bentonite than with controlled dispersion. The detrimental effect was attributed to the increase in slime coating. In the uncontrolled dispersion, the dispersed bentonite platelets formed an extensive card-house structure. The three-dimensional networks increased the slurry viscosity, and caused significant coating of the coal particles, thereby inhibiting particle mobility and bubble-particle attachment. In the controlled dispersion, the bentonite mineral appeared as separate particles with low aspect ratios. The coal particles were partially coated, and the slurry viscosity was lower, resulting in higher flotation recovery. The findings in this study suggested that a practical solution to mitigate the negative impact of swelling clay on flotation would be to maintain high electrolyte levels in the wash water to inhibit clay swelling and dispersion.

Słowa kluczowe

EN

fine coal flotation; swelling clay; controlled dispersion; CaCl2; slime coating

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2019
• Tom: Vol. 55, iss. 2
• Strony: 380--388
• Opis fizyczny: Bibliogr. 23 poz., rys., tab.

Twórcy

autor

Zhang Mingqing

• School of Environmental Science & Spatial Informatics, China University of Mining & Technology, Xuzhou 221116, China

autor

Yu Wei

• School of Environmental Science & Spatial Informatics, China University of Mining & Technology, Xuzhou 221116, China

autor

Cao Yijun

• National Engineering Research Centre of Coal Preparation and Purification, China University of Mining & Technology, Xuzhou 221116, China

autor

Xu Haiyu

• School of Environmental Science & Spatial Informatics, China University of Mining & Technology, Xuzhou 221116, China

Bibliografia

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).