Selective depression effect in flotation separation of copper-molybdenum sulfides using 2,3-disulfanylbutanedioic acid  

2,3-二巯基丁二酸在铜-钼硫化矿浮选分离过程中的选择性抑制作用（英文）

作　　者：李明阳[1] 魏德洲[1] 沈岩柏[1] 刘文刚[1] 高淑玲[1] 梁广泉[1,2] 

机构地区：[1]东北大学资源与土木工程学院,沈阳110819 [2]河北钢铁集团矿业有限公司,唐山063000

出　　处：《Transactions of Nonferrous Metals Society of China》2015年第9期3126-3132,共7页中国有色金属学报（英文版）

基　　金：Project(2012BAB01B03)supported by the National Key Technology Support Program of China

摘　　要：2,3-disulfanylbutanedioic acid（DMSA） was found to be a selective depressant in the flotation separation of coppermolybdenum sulfides.The flotation results suggest that a low dosage of DMSA has a strong depression effect on chalcopyrite in the p H range between 4 and 12.At p H 6,the recoveries of molybdenum are up to 85%,75%,and 80% while those of chalcopyrite are 15%,5%,and 20% respectively when flotation tests are carried out with single minerals,mixed minerals and molybdenum-bearing copper concentrates.Adsorption isotherms measurement indicates that DMSA adsorbs more strongly on chalcopyrite than on molybdenite.The frontier orbital calculation reveals that the two S atoms of DMSA molecule are active centers for the adsorption of the DMSA molecule on chalcopyrite surface.Fermi level calculation shows that chalcopyrite can obtain electrons from the DMSA molecule while molybdenite cannot.2,3-二巯基丁二酸(DMSA)是一种铜-钼硫化矿分离浮选抑制剂。浮选试验结果表明,在p H 4-12的范围内少量的DMSA可对黄铜矿产生强烈的抑制作用。在p H 6条件下对单矿物、人工混合矿、含钼铜精矿进行浮选分离试验,钼的浮选回收率分别为85%、75%和80%,同时铜的回收率仅为15%、5%和20%。吸附量试验结果显示,DMSA在黄铜矿上的吸附作用明显强于辉钼矿。前线轨道计算表明,DMSA分子中的两个硫原子是药剂分子与黄铜矿表面作用的活性中心。费米能级计算结果显示黄铜矿可以从DMSA分子获得电子而辉钼矿不能。

关 键 词：2 3-disulfanylbutanedioic acid molybdenite chalcopyrite copper-molybdenum separation frontier orbital 

分 类 号：TD923[矿业工程—选矿]