CAJ | 학술논문

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pH4?12的范围内少量的DMSA可对黄铜矿产生强烈的抑制作用.在pH 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.
2,3-이구기정이산(DMSA)시일충동?목류화광분리부선억제제.부선시험결과표명,재pH4?12적범위내소량적DMSA가대황동광산생강렬적억제작용.재pH 6조건하대단광물、인공혼합광、함목동정광진행부선분리시험,목적부선회수솔분별위85%、75%화80%,동시동적회수솔부위15%、5%화20%.흡부량시험결과현시,DMSA재황동광상적흡부작용명현강우휘목광.전선궤도계산표명,DMSA분자중적량개류원자시약제분자여황동광표면작용적활성중심.비미능급계산결과현시황동광가이종DMSA분자획득전자이휘목광불능.
2,3-disulfanylbutanedioic acid (DMSA) was found to be a selective depressant in the flotation separation of copper? molybdenum sulfides. The flotation results suggest that a low dosage of DMSA has a strong depression effect on chalcopyrite in the pH range between 4 and 12. At pH 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.