The effects of mineral processing wastewater on sulfide minerals were investigated by flotation,infrared spectrometry and electrochemistry test. The results show that lead-concentrate water can improve the flotation o...The effects of mineral processing wastewater on sulfide minerals were investigated by flotation,infrared spectrometry and electrochemistry test. The results show that lead-concentrate water can improve the flotation of galena,while the sulfur-concentrate water has negative effect on flotation of galena compared with distilled water. The flotation behavior of pyrite is contrary to that of galena in three kinds of water. Infrared spectra indicate that the residual collector in the lead-concentrate water is beneficial to the formation of lead xanthate on the surface of galena. Electrochemistry results indicate that electrochemistry reaction on galena surface has apparent change. The anode polarization is improved and cathode polarization is depressed.展开更多
In flotation,metal ions possess significant roles that are usually fulfilled by either selectively activating or depressing the target minerals.Despite that tremendous efforts have been made to address the roles of me...In flotation,metal ions possess significant roles that are usually fulfilled by either selectively activating or depressing the target minerals.Despite that tremendous efforts have been made to address the roles of metal ions in flotation,it still lacks a comprehensive review,especially to compare various ions instead of focusing on a specific one.This review begins by elaborately categorizing the factors involved in affecting the roles of metal ions in flotation.After that,well-accepted mechanisms are updated and discussed from the ore type.Furthermore,typical approaches to explore the underlying mechanisms are emphasized,including traditional techniques such as micro-flotation,contact angle measurement,zeta potential measurement,and other recent prevailing methodologies,like computational method,solution chemistry calculation,and cyclic voltammetry.This work will pave the way to promote flotations via activities like selectively adding/reducing metal ions,choosing reagents,and regulating the slurry chemistry.展开更多
The electrochemical basis for understanding the interaction of thiol collectors with sulfide minerals is reviewed. Spectroscopic techniques are being increasingly applied to augment electrochemical studies and provide...The electrochemical basis for understanding the interaction of thiol collectors with sulfide minerals is reviewed. Spectroscopic techniques are being increasingly applied to augment electrochemical studies and provide unequivocal identification of species formed at mineral surfaces in flotation systems. These include X ray photoelectron, Fourier transform infrared spectroscopy and, more recently, surface enhanced Raman scattering spectroscopy. The progress that has been made in the application of electrochemical measurement to monitor and control flotation plants is also considered.展开更多
基金Project(2006AA06Z120) supported by the Hi-tech Research and Development Program of ChinaProject(50874117) supported by the National Natural Science Foundation of China
文摘The effects of mineral processing wastewater on sulfide minerals were investigated by flotation,infrared spectrometry and electrochemistry test. The results show that lead-concentrate water can improve the flotation of galena,while the sulfur-concentrate water has negative effect on flotation of galena compared with distilled water. The flotation behavior of pyrite is contrary to that of galena in three kinds of water. Infrared spectra indicate that the residual collector in the lead-concentrate water is beneficial to the formation of lead xanthate on the surface of galena. Electrochemistry results indicate that electrochemistry reaction on galena surface has apparent change. The anode polarization is improved and cathode polarization is depressed.
基金financial supports from the National Natural Science Foundation of China(Nos.U2067201,51774328)the Key Program for International S&T Cooperation Projects of China(No.2021YFE0106800)+2 种基金the Science Fund for Distinguished Young Scholars of Hunan Province,China(No.2020JJ2044)the Young Elite Scientists Sponsorship Program by Hunan province of China(No.2018RS3011)the National 111 Project of China(No.B14034)。
文摘In flotation,metal ions possess significant roles that are usually fulfilled by either selectively activating or depressing the target minerals.Despite that tremendous efforts have been made to address the roles of metal ions in flotation,it still lacks a comprehensive review,especially to compare various ions instead of focusing on a specific one.This review begins by elaborately categorizing the factors involved in affecting the roles of metal ions in flotation.After that,well-accepted mechanisms are updated and discussed from the ore type.Furthermore,typical approaches to explore the underlying mechanisms are emphasized,including traditional techniques such as micro-flotation,contact angle measurement,zeta potential measurement,and other recent prevailing methodologies,like computational method,solution chemistry calculation,and cyclic voltammetry.This work will pave the way to promote flotations via activities like selectively adding/reducing metal ions,choosing reagents,and regulating the slurry chemistry.
文摘The electrochemical basis for understanding the interaction of thiol collectors with sulfide minerals is reviewed. Spectroscopic techniques are being increasingly applied to augment electrochemical studies and provide unequivocal identification of species formed at mineral surfaces in flotation systems. These include X ray photoelectron, Fourier transform infrared spectroscopy and, more recently, surface enhanced Raman scattering spectroscopy. The progress that has been made in the application of electrochemical measurement to monitor and control flotation plants is also considered.
