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bubble-particle interaction in flotation cell

中国有色金属学会会刊：英文版 2000年第S1期10卷 40-44页

作者：卢寿慈 Univ Sci & Technol Beijing Beijing 100083 Peoples R China

Three elementary processes of bubble particle interaction: collision, adhesion and detachment, in turbulent flow of flotation cell were analyzed. A general equation describing the particle bubble interaction was derived, which allows us to evaluate the flotation rate constant quantitatively. The results of calculation were verified experimentally.

关键词： bubble-particle interaction collision adhesion detachment flotation

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Improving bubble-particle attachment during the flotation of low rank coal by surface modification

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International Journal of Mining Science and Technology 2020年第2期30卷 217-223页

作者： Haishan Hu Ming Li Lulu Li Xiuxiang Tao School of Chemical Engineering&Technology China University of Mining and TechnologyXuzhou 221116China National Engineering Research Center of Coal Preparation and Purification China University of Mining and TechnologyXuzhou 221116China

Based on the problems caused by many oxygen-containing functional groups and poor floatability on the surface of low rank coal,the characteristics of low rank coal were analyzed systematically by means of scanning electron microscopy(SEM),X-ray diffraction(XRD)and X-Ray photoelectron spectroscopy(XPS)*** bubble-particle induction time was used to determine the characterization of the bubble-particle attachment,and the bubble-particle attachment of low rank coal modified by soaking the coal samples in an acid or alkaline solution was *** floatability of the modified coal surface was verified by flotation *** results show that the particle size of 0.125–0.074 mm of the coal sample exhibited better bubble-particle attachment *** small bubble,the larger approach velocity of bubble and the larger bubble deformation were more helpful to enhance the bubbleparticle *** an acid solution,the smaller the p H was and the longer the soaking time was,the better the floatability of the coal sample and the higher the combustible material recovery *** combustible material recovery of low rank coal was increased to 78.79%by soaking the sample in an acid solution of pH=0 for 180 *** the contrary there was a best concentration for the alkaline solution.

关键词： Low rank coal Induction time Modification Flotation bubble-particle attachment

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