Electronic structure and flotation behavior of complex mineral jamesonite  

复杂矿物脆硫锑铅矿的电子结构与浮选行为（英文）

作　　者：赵翠华[1,2,3] 陈建华[3,4] 李玉琼[4] 何茜[4] 吴伯增[2] 

机构地区：[1]广西大学材料科学与工程学院,南宁530004 [2]广西华锡集团股份有限公司,柳州545006 [3]广西大学化学化工学院,南宁530004 [4]广西大学广西高校矿物工程重点实验室,南宁530004

出　　处：《Transactions of Nonferrous Metals Society of China》2015年第2期590-596,共7页中国有色金属学报（英文版）

基　　金：Project(NCET-11-0925)supported by the New Century Excellent Talents in University,China;Project(51164001)supported by the National Natural Science Foundation of China;Project supported by Open Foundation of Guangxi Key Laboratory for Advanced Materials and Manufacturing Technology,China

摘　　要：Electronic structures of complex mineral jamesonite were studied using density functional theory method together with their flotation behavior. The flotation behavior ofjamesonite is similar to that of stibnite, indicating good floatability at pH below 6 and easy depression with NaOH, especially with lime. In weak alkaline condition, the flotation behavior ofjamesonite is close to that of galena. The coordination structure of Pb for jamesonite is more complex than that for galena. Sb in jamesonite possesses two coordinated modes, whereas Sb of stibnite is only 3-coordinated. Pb in galena is more active than that in jamesonite. Sb （3-coordination） in jamesonite is inactive, in contrast with that in stibnite. However, 4-coordination Sb in jamesonite is more active than 3-coordination Sb. HOMO orbitals of jamesonite and stibnite contain metal atoms, which contribute to the formation of adsorption configuration of CaOH^＋ when there is lime; therefore, jamesonite and stibnite are easily depressed by lime.采用密度泛函理论研究复杂矿物脆硫锑铅矿的电子结构及其浮选行为。脆硫锑铅矿的浮选行为与辉锑矿相似,p H值小于6时具有较好的可浮性,并且容易被NaOH抑制,尤其是在有石灰存在时。在弱碱性条件下,脆硫锑铅矿的浮选行为接近于方铅矿的浮选行为。脆硫锑铅矿中Pb的配位结构比方铅矿中Pb的配位结构复杂。脆硫锑铅矿中的Sb存在2种配位模式,而辉锑矿中的Sb仅存在3-配位。方铅矿中的Pb比脆硫锑铅矿中的Pb活跃。与辉锑矿中的Sb相比,脆硫锑铅矿中的Sb(3-配位)不活跃,但是4-配位的Sb比3-配位的Sb活跃得多。脆硫锑铅矿和辉锑矿的HOMO轨道含有金属原子,石灰的存在有助于CaOH+吸附构型的形成。因此石灰对脆硫锑铅矿和辉锑矿都具有抑制作用。

关 键 词：JAMESONITE electronic structure flotation behavior density functional theory 

分 类 号：TD923[矿业工程—选矿]