Journal of Central South University of Technology

, Volume 14, Issue 6, pp 763–767 | Cite as

Depressing effect of phenoxyl acetic acids on flotation of minerals containing Ca2+/Mg2+ gangues

  • Zhang Jian-feng  (张剑锋)Email author
  • Hu Yue-hua  (胡岳华)
  • Wang Dian-zuo  (王淀佐)
  • Xu Jin  (徐 竞)


Phenoxyl acetic acids were applied to determine their depressing effect on minerals containing Ca2+/Mg2+ gangues. Calcite, mixture of calcite and fluorite, and nickel ore were used in the flotation. And the depression mechanism was studied by the determination of contact angle, zeta potential, adsorptive capacity of collector, and IR analysis as well. It is found that 0.1 mmol/L of phenoxyl acetic acid derived from pyrogallol or gallic acid exhibits strong depressing ability on calcite in almost zero yields at pH value of 9.8, and calcite can be depressed in the flotation of calcite/fluorite mixture for approximate 87% yield of fluorite. The flotation result of practical nickel ore containing serpentine indicates that these two depressants may also show better depression performance to serpentine than traditional depressants such as sodium fluosilicate and carboxylmethyl ceullulose. Analysis for the depression mechanism reveals that there exists strong chemical interaction between the depressants and minerals.

Key words

flotation depressing effect depressant phenoxyl acetic acid calcite serpentine 


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Copyright information

© Published by: Central South University Press, Sole distributor outside Mainland China: Springer 2007

Authors and Affiliations

  • Zhang Jian-feng  (张剑锋)
    • 1
    Email author
  • Hu Yue-hua  (胡岳华)
    • 2
  • Wang Dian-zuo  (王淀佐)
    • 2
  • Xu Jin  (徐 竞)
    • 2
  1. 1.State Key Laboratory Base of Novel Functional Materials and Preparation Science, Faculty of Materials Science and Chemical EngineeringNingbo UniversityNingboChina
  2. 2.School of Resources Processing and BioengineeringCentral South UniversityChangshaChina

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