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中南大学学报(英文版)

Journal of Central South University

Vol. 25    No. 12    December 2018

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Improving collecting performance of sodium oleate using a polyoxyethylene ether in scheelite flotation
CHEN Chen(陈臣)1, ZHU Hai-ling(朱海玲)1, 2, QIN Wen-qing(覃文庆)1, CHAI Li-yuan(柴立元)2, JIA Wen-hao(贾文浩)1

1. School of Mineral Processing and Bioengineering, Central South University, Changsha 410083, China;
2. School of Metallurgy and Environment, Central South University, Changsha 410083, China

Abstract:In order to improve the scheelite flotation with sodium oleate (NaOL), the effect of a non-ionic polyoxyethylene ether (JFC-5) on the floatability of scheelite was investigated through flotation experiments at 10 °C, compared with 60 mg/L NaOL alone, the recovery of scheelite is improved from 22% to 85% in the presence of JFC-5 with a mass ratio of 20% at pH 10. Moreover, the resistance to Ca2+ of NaOL is increased. The adsorption mechanism was analyzed by zeta potential measurement, contact angle measurement and X-ray photoelectron spectroscopy (XPS) analysis. The results show that the adsorption of NaOL on scheelite surface is enhanced after adding JFC-5 due to the more negative zeta potentials and larger contact angles of scheelite. And the co-adsorption of NaOL and JFC-5 is confirmed by XPS analysis, so it is indicated that the adsorption of JFC-5 decreases the electrostatic repulsion between the oleate ions, resulting in the stronger adsorption of NaOL on scheelite surface. In short, the mixed NaOL/JFC-5 collector can effectively improve scheelite flotation.

 

Key words: scheelite; polyoxyethylene ether; synergistic effect; low temperature flotation; adsorption

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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