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Journal of Central South University of Technology

, Volume 13, Issue 6, pp 678–682 | Cite as

Synthesis of glycerine-xanthate and its depressing mechanism in separation of marmatite from arsenopyrite

  • Xiong Dao-ling  (熊道陵)
  • Hu Yue-hua  (胡岳华)Email author
  • Qing wen-qin  (覃文庆)
  • He Ming-fei  (何名飞)
Article

Abstract

A small molecular organic depressor glycerine-xanthate was synthesized. The effect of glycerine-xanthate on the flotation of sulfide minerals was investigated based on a function of pH value and concentration of glycerine-xanthate through flotation experiments in the presence and absence of Cu2+. The results show that glycerinee-xanthate has a strong dressing effect on marmatite at pH>6 and on arsenopyrite in weak acid and base conditions with butyl-xanthate as collector. In the presence of glycerine-xanthate, marmatite is activated by addition of Cu2+, but arsenopyrite cannot be activated and remains unfloatable. So the selective separation can be achieved for two minerals. The depression of glycerine-xanthate on sulfide minerals was discussed based on the radical electronegative calculation and the theory of HSAB. Infrared spectrum shows that there are some —OH and —CSS— in glycerine-xanthate molecule, which competes with butyl-xanthate on the mineral surface. As a result of many hydrophilic groups in glycerine-xanthate, the surfaces of marmatite and arsenopyrite become hydrophilic, thus the flotation of marmatite and arsenopyrite is depressed. The collector is adsorbed preferentially on the surface of marmatite and it shows a better floatability in the presence of Cu2+, whereas, the surface of arsenopyrite absorbs glycerine-xanthate and the flotation of arsenopyrite is depressed by glycerine-xanthate.

Key words

organic depressant synthesis glycerine-xanthate marmatite arsenopyrite flotation 

CLC number

X131.3 

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Copyright information

© Published by: Central South University Press, Sole distributor outside Mainland China: Springer 2006

Authors and Affiliations

  • Xiong Dao-ling  (熊道陵)
    • 1
    • 2
  • Hu Yue-hua  (胡岳华)
    • 1
    Email author
  • Qing wen-qin  (覃文庆)
    • 1
  • He Ming-fei  (何名飞)
    • 1
  1. 1.School of Minerals Processing and BioengineeringCentral South UniversityChangshaChina
  2. 2.School of Materials and Chemical EngineeringJiangxi University of Science and TechnologyGanzhouChina

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