Molecular Mechanics Analysis of Flotation Behavior in Chalcopyrite or Malachite-Xanthates System
Flotation of chalcopyrite and unactivated malachite with xanthates (ethylxanthate, butylxanthate,octylxanthate and dodecylxanthate) is studied in this paper. Minerals interacted with xanthates are detected by FTIR, and simulated by molecular mechanics. It shows that chalcopyrite can be floated with 4 kinds of xanthates, and unactivated malachite cant be floated with ethylxanthate but can be floated directly with later 3 kinds of xanthates while characteristic absorption peaks of those four kinds of xanthates are all detected by FTIR on chalcopyrite and malachite surface. After simulating the interaction between xanthate and mineral, it shows that H2O and OH- can interact with chalcopyrite and malachite, and their interaction energy may be so called energy bulwark which must be overcome by collector when collector interacts on minerals; the two sulfur atoms in xanthate group interact with copper and neighbor iron atoms on chalcopyrite. It also shows that molecular mechanics results with logP of collectors can interpret the mechanism of xanthate-mineral on atom scale.
Flotation Chalcopyrite Malachite FTIR Molecular Mechanics
C. Y. Sun F. L. Wang
State Key Laboratory of Mineral Processing, BGRIMM, Beijing, China Northeastern University, Shenyang, China
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
914-923
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）