蛇纹石的水溶特性对水镁石浮选的影响

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英文篇名：Effect of Water Solubility of Serpentine on the Flotation of Brucite 作者：付亚峰 ; 孙浩然 ; 杨毅深 ; 印万忠 英文作者：FU Ya-feng;SUN Hao-ran;YANG Yi-shen;YIN Wan-zhong;School of Resources & Civil Engineering,Northeastern University;Zijin Mining Group Company Limited; 关键词：水镁石 ; 蛇纹石 ; 水溶特性 ; 泡沫夹带 ; 浮选 英文关键词：brucite;;serpentine;;water solubility;;foam entrainment;;flotation 中文刊名：DBDX 英文刊名：Journal of Northeastern University(Natural Science) 机构：东北大学资源与土木工程学院;紫金矿业集团股份有限公司; 出版日期：2019-07-15 出版单位：东北大学学报(自然科学版) 年：2019 期：v.40;No.346 基金：国家自然科学基金资助项目(51604189,51804213);国家自然科学基金重点国际(地区)合作研究项目(51820105006) 语种：中文; 页：DBDX201907018 页数：5 CN：07 ISSN：21-1344/T 分类号：100-104

摘要

选取四种不同粒级蛇纹石,利用Hallimond管考察了调浆时间对水镁石及蛇纹石回收率的影响,通过检测矿浆pH、Mg~(2+)浓度、Zeta电位、接触角及矿浆黏度,系统研究了蛇纹石的水溶性及其对油酸钠捕收水镁石的影响.结果表明:随着调浆时间增加,蛇纹石表面Mg~(2+)溶解量逐渐增加,致使蛇纹石Zeta电位降低.此外油酸根离子易与溶液中Mg~(2+)作用,消耗大量油酸根离子,致使水镁石回收率降低;蛇纹石粒级越细、调浆时间越长,则蛇纹石矿浆黏度越大,浮选过程中泡沫稳定性越强,导致蛇纹石的泡沫夹带量增加.
        Four kinds of serpentine with different grain size were selected,and the modified Hallimond tube was used to investigate the effect of conditioning time on the recovery of brucite and serpentine. By analyzing the properties of pulp pH,Mg~(2+) concentration,Zeta potential,contact angle and pulp viscosity,the water solubility of serpentine and its effect on the floatability of brucite by sodium oleate were systematically studied. The results showed that with the increase of conditioning time,the solubility of Mg~(2+) on serpentine surface increases gradually,resulting in reduction of serpentine Zeta potential. Furthermore,the oleate ion reacts easily with Mg~(2+) in solution to form magnesium oleate,so a large amount of oleate ion is consumed,resulting in a lower recovery rate of brucite. The finer the particle size of serpentine and the longer the conditioning time are,the greater the viscosity of the serpentine pulp is,which leads to the enhancement of foam stability during the flotation process,resulting in an increase in the foam entrainment rate of serpentine.

引文

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