Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 26    No. 12    December 2016

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Flotation behaviors and mechanisms of chalcopyrite and galena after cyanide treatment
Yi-wen MA1,2, Yue-xin HAN1, Yi-min ZHU1, Yan-jun LI1, Hao LIU1

1. College of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China;
2. School of Mining Engineering, University of Science and Technology Liaoning, Anshan 114051, China

Abstract:Adsorbing tests between CN- and chalcopyrite or galena were conducted firstly, and then flotation tests of the two cyaniding minerals were investigated in butyl xanthate (BX) system. Results showed that the interaction between CN- and the two mineral surfaces were both chemical adsorption and can be described by the Langmuir adsorption isotherm model. In the optimum condition of pH 6.5 and 4.0 mg/L BX, the recovery of cyaniding chalcopyrite and galena reached 82.1% and 63.9%, respectively. BX improved the hydrophobicity of the surfaces of the two minerals, although CN- reduced the contact angle on the surface of minerals. The inhibitory effect of CN- on chalcopyrite far outweighed galena. Electrostatic adsorption exists in the interaction between BX and the surface of galena after cyanide treatment in the pH range of 4.2-8.4, while the interactions between BX and the surface of chalcopyrite after cyanide treatment is chemical adsorption.

 

Key words: chalcopyrite; galena; cyanide absorption; flotation; butyl xanthate

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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