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A novel cationic collector for silicon removal from collophane using reverse flotation under acidic conditions

International Journal of Minerals,Metallurgy and Materials 2023年第6期30卷 1038-1047页

作者： Zhongxian Wu Dongping Tao Youjun Tao Man Jiang Patrick Zhang School of Resources and Environmental Engineering Shandong University of TechnologyZibo 255049China Key Laboratory of Coal Processing and Efficient Utilization of Ministry of Education China University of Mining&TechnologyXuzhou 221116China School of Chemical Engineering and Technology China University of Mining&TechnologyXuzhou 221116China Florida Industrial and Phosphate Research Institute Florida Polytechnic UniversityFlorida 33830USA

We analyzed a novel cationic collector using chemical plant byproducts,such as cetyltrimethylammonium bromide(CTAB)and dibutyl phthalate(DBP).Our aim is to establish a highly effective and economical process for the removal of quartz from collophane.A microflotation test with a 25 mg·L^(−1)collector at pH value of 6-10 demonstrates a considerable difference in the floatability of pure quartz and *** tests for a collophane sample subjected to the first reverse flotation for magnesium removal demonstrates that a rough flotation process(using a 0.4 kg·t−1 new collector at pH=6)results in a collophane concentrate with 29.33wt%P_(2)O_(5)grade and 12.66wt%SiO2 at a 79.69wt%P_(2)O_(5)recovery,providing desirable *** studies using Fourier transform infrared spectroscopy,zeta potential,and contact angle measurements show that the adsorption capacity of the new collector for quartz is higher than that for *** synergistic effect of DBP increases the difference in hydrophobicity between quartz and *** maximum defoaming rate of the novel cationic collector reaches 142.8 mL·min−*** is considerably higher than that of a conventional cationic collector.

关键词： cationic collector collophane defoaming quartz reverse flotation

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Lattice Boltzmann study of the interaction between a single solid particle and a thin liquid film

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Applied Mathematics and Mechanics(English Edition) 2020年第8期41卷 1179-1194页

作者： Xiaojun QUAN Xuewen LIU Jinjing LI Xunji GAO MOE Key Laboratory for Power Machinery and Engineering School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China

The isothermal single-component multi-phase lattice Boltzmann method(LBM)combined with the particle motion model is used to simulate the detailed process of liquid film rupture induced by a single spherical *** entire process of the liquid film rupture can be divided into two *** Stage 1,the particle contacts with the liquid film and moves into it due to the interfacial force and finally penetrates the liquid *** in Stage 2,the upper and lower liquid surfaces of the thin film are driven by the capillary force and approach to each other along the surface of the particle,resulting in a complete *** is found that a hydrophobic particle with a contact angle of 106.7°shows the shortest rupture duration when the liquid film thickness is less than the particle *** the thickness of the liquid film is greater than the immersed depth of the particle at equilibrium,the time of liquid film rupture caused by a hydrophobic particle will be *** the other hand,a moderately hydrophilic particle can form a bridge in the middle of the liquid film to enhance the stability of the thin liquid film.

关键词： lattice Boltzmann method(LBM) liquid film defoaming wettability solid particle

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