东北大学学报:自然科学版 ›› 2018, Vol. 39 ›› Issue (3): 362-366.DOI: 10.12068/j.issn.1005-3026.2018.03.012

• 材料与冶金 • 上一篇    下一篇

铜钼浮选分离中硫化钠的消耗机理

王剑, 刘子龙, 陈国宝, 杨洪英   

  1. (东北大学 冶金学院, 辽宁 沈阳110819)
  • 收稿日期:2016-10-11 修回日期:2016-10-11 出版日期:2018-03-15 发布日期:2018-03-09
  • 通讯作者: 王剑
  • 作者简介:冯明杰(1971-), 男, 河南禹州人, 东北大学副教授; 王恩刚(1962-), 男, 辽宁沈阳人, 东北大学教授,博士生导师.王剑(1992-),男,内蒙古呼伦贝尔人,东北大学博士研究生; 杨洪英(1960-),女,河北张家口人,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(51171041).国家自然科学基金资助项目(U1608254, 51374066).

Consumption Mechanism of Sodium Sulfide in Flotation Separation of Copper and Molybdenum

WANG Jian, LIU Zi-long, CHEN Guo-bao, YANG Hong-ying   

  1. School of Metallurgy, Northeastern University, Shenyang 110819, China.
  • Received:2016-10-11 Revised:2016-10-11 Online:2018-03-15 Published:2018-03-09
  • Contact: YANG Hong-ying
  • About author:-
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摘要: 针对铜钼浮选分离生产过程中,往往存在着硫化钠抑制剂消耗量过大、生产成本过高的现象,使用硫离子选择电极动态监测不同条件下硫化钠溶液中硫离子电位,来初步研究硫化钠大量消耗的机理.结果表明:铜钼浮选分离过程中,空气的鼓入和矿浆的未加温处理会增加硫化钠的氧化消耗,是硫化钠消耗量大的原因之一.浮选矿浆中的矿物(如辉钼矿、黄铜矿和黄铁矿)有着催化硫化钠氧化分解的作用,加上矿物本身对硫化钠的吸附作用,是造成铜钼浮选分离过程中硫化钠大量消耗的又一原因.此外,矿浆中溶出的少量金属阳离子(如Cu2+和Fe3+)对硫化钠的氧化分解也有一定作用,进一步加剧了硫化钠的消耗.

关键词: 硫化钠, 消耗机理, 铜钼分离, 浮选, 氧化

Abstract: In the production process of copper-molybdenum flotation separation, the consumption of sodium sulfide inhibitors is always high. The high consumption of sodium sulfide dramatically increases the production cost of copper-molybdenum flotation separation. The mechanism of large consumption for sodium sulfide was preliminary studied in copper-molybdenum flotation separation. Under the different experiment conditions, dynamic monitoring approach was used to quickly measure the change of sulfide ion concentration in sodium sulfide solution by sulfide ionic selective electrode. The results showed that the oxidation of sodium sulfide can be catalyzed by flotation mineral(molybdenite, chalcopyrite and pyrite)and metal cation(Cu2+ and Fe3+)from flotation pulp. Moreover, the blowing air to flotation pulp and lower pulp temperature can also accelerate the oxidation consumption of sodium sulfide in flotation process.As a result, the large consumption of sodium sulfide is caused by catalysis action from mineral and metal cation, adsorptive action of mineral, the effect of flotation pulp temperature and blowing air to flotation pulp.

Key words: sodium sulfide, consumption mechanism, copper-molybdenum separation, flotation, oxidation

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