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

作　　者：Zhongxian Wu Dongping Tao Youjun Tao Man Jiang Patrick Zhang 

机构地区：[1]School of Resources and Environmental Engineering,Shandong University of Technology,Zibo 255049,China [2]Key Laboratory of Coal Processing and Efficient Utilization of Ministry of Education,China University of Mining&Technology,Xuzhou 221116,China [3]School of Chemical Engineering and Technology,China University of Mining&Technology,Xuzhou 221116,China [4]Florida Industrial and Phosphate Research Institute,Florida Polytechnic University,Florida 33830,USA

出　　处：《International Journal of Minerals,Metallurgy and Materials》2023年第6期1038-1047,共10页矿物冶金与材料学报（英文版）

基　　金：the financial support from the National Natural Science Foundation of China(No.51804188);the support of the Yunnan Yuntianhua Co.,Ltd.,China,for providing the phosphate samples.

摘　　要：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 fluorapatite.Flotation 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 results.Mechanism 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 fluorapatite.The synergistic effect of DBP increases the difference in hydrophobicity between quartz and fluorapatite.The maximum defoaming rate of the novel cationic collector reaches 142.8 mL·min−1.This is considerably higher than that of a conventional cationic collector.

关 键 词：cationic collector collophane DEFOAMING QUARTZ reverse flotation 

分 类 号：TD97[矿业工程—选矿] TD923