Depression behaviors of N-thiourea-maleamic acid and its adsorption mechanism on galena in Mo-Pb flotation separation  

作　　者：Liang Lu Wei Xiong Yangge Zhu Xingrong Zhang Yongxing Zheng 

机构地区：[1]State Key Laboratory of Mineral Processing,Beijing 102628,China [2]BGRIMM Technology Group,Beijing 102628,China [3]China-South Africa Belt and Road Joint Laboratory on Sustainable Exploration and Utilization of Mineral Resources,Beijing 102628,China [4]State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization,Kunming 650093,China

出　　处：《International Journal of Mining Science and Technology》2022年第1期181-189,共9页矿业科学技术学报（英文版）

基　　金：financial supports provided by National Key R&D Program of China(No.2017YFE0133100);National Natural Science Foundation of China(No.51974030);State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization(No.CNMRCUKF2102);the BGRIMM fund program(Grant No.02-1903).

摘　　要：In present study,a novel organic depressant N-thiourea-maleamic acid(TMA)was synthesized and applied as a galena depressant in the flotation separation of Mo-Pb ores.The depression behaviors of TMA were tested through flotation experiments.A wider separation window for single minerals over 90.0%was obtained at 30.0 mg/L TMA,confirming that TMA could depress galena significantly,while effected molybdenite floatability slightly.An effective separation was obtained for artificially mixed minerals and actual Mo-Pb ores.The adsorption mechanism on galena was revealed by UV-Vis spectra,zeta potential tests,Fourier transform infrared spectroscopy(FT-IR)analysis,contact angle tests and X-ray photoelectron spectroscopy(XPS)analysis.The zeta potentials of galena became more negative and the contact angle of galena dropped from initial 74.36°to 57.8°with 30.0 mg/L TMA depressant,inferring that TMA had adsorbed on galena surface.The analysis results of UV-Vis spectra,FT-IR and XPS gave further evidence that TMA might chemisorb on galena surface via Pb sites on galena surface and the thiourea group in TMA molecular structure,while the carboxyl group played a role of hydrophilicity.

关 键 词：MOLYBDENITE GALENA TMA Separation Adsorption 

分 类 号：TD952[矿业工程—选矿] TD923