Journal of Northeastern University Natural Science ›› 2018, Vol. 39 ›› Issue (3): 362-366.DOI: 10.12068/j.issn.1005-3026.2018.03.012

• Materials & Metallurgy • Previous Articles     Next Articles

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
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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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