东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2019, Vol. 40 ›› Issue (7): 1009-1013.DOI: 10.12068/j.issn.1005-3026.2019.07.018

• 资源与土木工程 • 上一篇    下一篇

蛇纹石的水溶特性对水镁石浮选的影响

付亚峰1， 孙浩然1， 杨毅深2， 印万忠1   

  1. (1. 东北大学 资源与土木工程学院， 辽宁 沈阳110819; 2. 紫金矿业集团股份有限公司， 福建 龙岩364200)
  • 收稿日期:2018-04-30 修回日期:2018-04-30 出版日期:2019-07-15 发布日期:2019-07-16
  • 通讯作者: 付亚峰
  • 作者简介:付亚峰(1991-)，男，山西吕梁人，东北大学博士研究生; 印万忠(1970-)，男，浙江临安人，东北大学教授，博士生导师.
  • 基金资助:
    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).

Effect of Water Solubility of Serpentine on the Flotation of Brucite

FU Ya-feng1， SUN Hao-ran1， YANG Yi-shen2， YIN Wan-zhong1   

  1. 1. School of Resources & Civil Engineering， Northeastern University， Shenyang 110819， China; 2. Zijin Mining Group Company Limited， Longyan 364200， China.
  • Received:2018-04-30 Revised:2018-04-30 Online:2019-07-15 Published:2019-07-16
  • Contact: FU Ya-feng
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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、Mg2+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Mg2+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Mg2+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.

关键词: 水镁石, 蛇纹石, 水溶特性, 泡沫夹带, 浮选

Abstract: 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， Mg2+ 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 Mg2+ on serpentine surface increases gradually， resulting in reduction of serpentine Zeta potential. Furthermore， the oleate ion reacts easily with Mg2+ 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.

Key words: brucite, serpentine, water solubility, foam entrainment, flotation

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