Changes in the flotation kinetic of bituminous coal before and after natural weathering processes

• Autorzy: Xia W. , Peng Y. , Ren C. , Xie G. , Liang C.

Identyfikatory

DOI

10.5277/ppmp150203

• Języki publikacji: EN

Abstrakty

EN

Natural weathering processes can make coal surface more hydrophilic due to the increase of content of hydrophilic functional groups (C-O, C=O, and COOH) and the decrease of content of hydrophobic functional groups (C-C and C-H) on coal surface, and hence the flotation recovery of fine coal is reduced. In this paper, a series of flotation tests were conducted in order to investigate the changes in the flotation kinetic of bituminous coal before and after natural weathering processes. Additionally, XPS was used to indicate the changes in surface properties of bituminous coal. In the investigations the flotation kinetic was changing. The classical first-order rate constant (k) of bituminous coal flotation was reduced after the natural weathering processes. A relationship between the classical first-order rate constant (k) and the hydrophilicity ability (HA) was given.

Słowa kluczowe

EN

flotation kinetic; classical first-order rate constant; natural weathering processes; XPS; contact angle

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2015
• Tom: Vol. 51, iss. 2
• Strony: 401--410
• Opis fizyczny: Bibliogr. 28 poz., rys., tab.

Twórcy

autor

Xia W.

• Key Laboratory of Coal Processing and Efficient Utilization (Ministry of Education), School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China

autor

Peng Y.

• Key Laboratory of Coal Processing and Efficient Utilization (Ministry of Education), School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China

autor

Ren C.

• Dezhou University, Dezhou 250323, Shandong, China

autor

Xie G.

• Key Laboratory of Coal Processing and Efficient Utilization (Ministry of Education), School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China

autor

Liang C.

• Shandong Energy Linyi Mining Group Co., Ltd., Linyi 276017, Shandong, China

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