新型二烷基黄原酸酯捕收剂DIDTC浮选机理  

Flotation Mechanism of New Dialkyl Dithiocarbonates Collector S-dodecyl O-isopropyl Dithiocarbonate( DIDTC)

作　　者：谭鑫[1] 路亮[2] 何发钰[3] 印万忠[1] 

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819 [2]北京矿冶研究总院矿物加工科学与技术国家重点实验室,北京102628 [3]中国五矿集团总公司,北京100010

出　　处：《东北大学学报（自然科学版）》2015年第12期1748-1752,共5页Journal of Northeastern University(Natural Science)

基　　金：国家高技术研究发展计划项目(2013AA064101)

摘　　要：合成了一种活性二烷基黄原酸酯捕收剂——S-十二烷基,O-异丙基-黄原酸酯(DIDTC)并将其用于浮选分离黄铜矿和黄铁矿.浮选实验结果表明DIDTC具有比丁基黄药更好的选择性,紫外可见光谱证明DIDTC对铜离子比铁离子具有更强的吸附性.采用红外光谱和吸附实验研究了DIDTC对黄铜矿表面的吸附机理,实验结果表明在碱性环境中DIDTC可能通过其分子中的S原子和O原子同时与黄铜矿表面的铜原子发生了键合,并在浓度较高时形成多层吸附.另外,还采用普遍微扰理论和基于GGA/PW91作为交换相关函的密度泛函计算对上述结果进行了捕收剂的构效关系分析.A positive dialkyl dithiocarbonates collector S-dodecyl O-isopropyl dithiocarbonate（ DIDTC） was synthesized and used in the flotation separation of chalcopyrite from pyrite. The results of flotation test indicated that DIDTC collector had better selectivity than butyl xanthate.UV-vis spectra demonstrated that DIDTC showed more affinities to Cu2 ＋ions than to Fe3 ＋ions.FTIR spectra and adsorption test were executed to study the adsorption mechanism of DIDTC to chalcopyrite. The results elucidated that DIDTC might bond copper atoms of chalcopyrite surface with its sulfur and oxygen atoms in alkaline environments,and formed a multilayer at high concentration. In addition,the results were analyzed from the structure-activity of collectors by generalized perturbation theory and density functional calculation with GGA / PW91 as exchange correlation functional.

关 键 词：S-十二烷基 O-异丙基-黄原酸酯(DIDTC) 铜硫分离 吸附 普遍化微扰理论 构效关系 

分 类 号：TD923[矿业工程—选矿]