Mechanism study on flotation separation of molybdenite from chalcocite using thioglycollic acid as depressant  

作　　者：Qin Wenqing Wu Jiajia Jiao Fen Zeng Jinming 

机构地区：[1]School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China

出　　处：《International Journal of Mining Science and Technology》2017年第6期1043-1049,共7页矿业科学技术学报（英文版）

基　　金：provided by the National Natural Science Foundation of China(No.51274255);the Innovation Driven Plan of Central South University(No.2015CX005);the Postdoctoral Research Station of Central South University;Co-Innovation Centre for Clean and Efficient Utilization of Strategic Metal Mineral Resources

摘　　要：Effects of collectors(butyl xanthate(BX), O-isopropyl-N-sulfur ethyl carbamate(Z-200) and emulsified kerosene), dereagent(sodium sulfide) and depressant thioglycollic acid(TGA) on the flotation of chalcocite and molybdenite were investigated through flotation. The first principle theory was adopted to understand the difference of their surfaces and reaction between minerals and reagents. Results of flotation tests revealed that selectivity of emulsified kerosene is the best of three collectors in separation of chalcocite and molybdenite, though the others also display excellent collecting properties. Sodium sulfide can effectively remove collectors adsorbed on chalcocite surface, and TGA is an effective depressant of chalcocite at pH 8-9. Through first principle study, molybdenite displays relatively stronger covalence property while bonding interaction between copper atoms in chalcocite enhanced its ionicity. Bonding interaction is weaker in reaction of TGA and molybdenite, so it shows higher hydrophobicity and better flotability. Therefore, TGA is an effective inhibitor in the separation.Effects of collectors(butyl xanthate(BX), O-isopropyl-N-sulfur ethyl carbamate(Z-200) and emulsified kerosene), dereagent(sodium sulfide) and depressant thioglycollic acid(TGA) on the flotation of chalcocite and molybdenite were investigated through flotation. The first principle theory was adopted to understand the difference of their surfaces and reaction between minerals and reagents. Results of flotation tests revealed that selectivity of emulsified kerosene is the best of three collectors in separation of chalcocite and molybdenite, though the others also display excellent collecting properties. Sodium sulfide can effectively remove collectors adsorbed on chalcocite surface, and TGA is an effective depressant of chalcocite at pH 8-9. Through first principle study, molybdenite displays relatively stronger covalence property while bonding interaction between copper atoms in chalcocite enhanced its ionicity. Bonding interaction is weaker in reaction of TGA and molybdenite, so it shows higher hydrophobicity and better flotability. Therefore, TGA is an effective inhibitor in the separation.

关 键 词：CHALCOCITE MOLYBDENITE Thioglycollic ACID FLOTATION FIRST-PRINCIPLES STUDY 

分 类 号：TD923[矿业工程—选矿] TD954