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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 14    No. 6    December 2004

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Electrochemical flotation of ethyl xanthate-pyrrhotite system
ZHANG Qin(张 芹), HU Yue-hua(胡岳华), 
GU Guo-hua(顾帼华), NIE Zhen-yuan(聂珍缓)

School of Resources Processing and Bio-engineering, Central South University,
 Changsha 410083, China

Abstract: The flotation behavior of pyrrhotite was investigated by using ethyl xanthate as a collector. The results show that pyrrhotite has good floatability from pH 2 to 11, and poor flotability when pH>12. The reagents adjusting potential are ammonium persulfate ((NH4)2S2O8) and sodium dithionite (Na2S2O4). The flotation of pyrrhotite is dependent on pulp potential at certain pH value. The potential-pH range for pyrrhotite flotation was established. Cyclic voltammetry and FTIR spectroscopy analysis show that the major adsorption product of ethyl xanthate on pyrrhotite is dixanthogen. The intensity of FTIR signals of dixanthogen adsorbed on pyrrhotite and the anode current of a pyrrhotite electrode and flotation response of pyrrhotite are correlated with pulp potentials.

 

Key words:  ethyl xanthate; pyrrhotite; electrochemical flotation; FTIR spectroscopy; cyclic voltammetry

ISSN 1672-7029
CN 43-1423/U

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