Cu2+与Pb2+对辉锑矿浮选行为的活化机理研究
Activation mechanisms of Cu2+and Pb2+in stibnite flotation
肖有明 1崔毅琦 2童雄 1王靖 1黄典强 1张洋1
作者信息
- 1. 昆明理工大学国土资源工程学院,云南昆明 650093
- 2. 昆明理工大学国土资源工程学院,云南昆明 650093;云南省金属尾矿资源利用工程研究中心,云南昆明 650093
- 折叠
摘要
通过微浮选试验、吸附量试验以及密度泛函(DFT)计算,本文研究了Cu2+、Pb2+对辉锑矿浮选存在的活化差异及机理.微浮选试验表明,采用丁基黄药(BX)经Pb2+活化后浮选辉锑矿回收率较Cu2+活化提高了7.82％.吸附量试验显示,Pb2+在辉锑矿表面作用后,其表面能够吸附更多的BX.DFT计算结果表明,经Cu2+活化后BX的S1双键原子与Cu形成Cu—S键且属于得电子体系,而Pb2+活化后BX的单键S1和双键S2原子与Pb形成稳定螯合结构且属于失电子体系,为黄药和氧气作用矿物表面生成双黄药供了条件,显著地提高了辉锑矿的可浮性.
Abstract
Different activation mechanisms of Cu2+and Pb2+stibnite flotation were studied by microflotation test,adsorption capacity tests and density functional theory(DFT).Microflotation experiments indicated that the recovery rate of stibnite flotation with butyl xanthate(BX)was activated 7.82％higher by Pb2+than Cu2+.The presence of Pb2+increased the amount of adsorbed BX on the stibnite surface.The results of DFT suggested that Cu2+activation induced the formation of Cu-S bonds between the double-bonded S1 atom of BX with Cu,resulting in electron gain.Pb2+activation was followed by the formation of a stable chelating structure between single-bond S1 and double-bond S2 atoms of BX,resulting in electron loss.This system also facilitated dixanthate formation on the mineral surface via interaction between BX and oxygen,thus improving the floatability of stibnite.
关键词
辉锑矿/微浮选/DFT/铜离子/铅离子Key words
stibnite/microflotation/DFT/Cu2/Pb2+引用本文复制引用
基金项目
云南省重大科技项目(202202AG050010)
出版年
2024
NETL
NSTL
万方数据