Journal of Northeastern University:Natural Science ›› 2017, Vol. 38 ›› Issue (5): 716-720.DOI: 10.12068/j.issn.1005-3026.2017.05.022

• Resources & Civil Engineering • Previous Articles     Next Articles

Mechanism Study of Direct Flotation on Malachite by Sodium Oleate

SUN Qian-yu, YIN Wan-zhong, CAO Shao-hang, YAO Jin   

  1. School of Resources & Civil Engineering, Northeastern University, Shenyang 110819, China.
  • Received:2015-12-22 Revised:2015-12-22 Online:2017-05-15 Published:2017-05-11
  • Contact: YIN Wan-zhong
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Abstract:

The flotation behavior and action mechanism of sodium oleate as collector for direct flotation of malachite was studied.The adsorption mechanism of sodium oleate on the surface of malachite was investigated through the adsorption measurement, Zeta potential test, Fourier transform infrared spectroscopy analysis, and solution chemistry calculation and thermodynamic calculation of solution.The results showed that the recoveries of malachite are more than 70% at pH value from 7 to 10 with sodium oleate 160mg/L, which reached the highest value 88.67% at pH=9.5. The Zeta potential measurement and solution chemical calculation indicated that sodium oleate mainly emits the chemical adsorption on the surface of malachite, the active component are C17H33COOH·C17H33COO-, C17H33COO- and (C17H33COO)2-2 in sodium oleate solution. The results of Gibbs free energy calculation and FTIR spectrum analysis confirmed that oleate ions tends to react with malachite surface to form copper oleate precipitation causing malachite’s flotability.

Key words: sodium oleate, malachite, Zeta potential, solution chemistry calculation, FTIR(Fourier trans form infrared spectroscopy)

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