Ferric ion-triggered surface oxidation of galena for efficient chalcopyrite-galena separation  

作　　者：Qiancheng Zhang Limin Zhang Feng Jiang Honghu Tang Li Wang Wei Sun 

机构地区：[1]School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,China [2]Engineering Research Center of Ministry of Education for Carbon Emission Reduction in Metal Resource Exploitation and Utilization,Changsha 410083,China [3]School of Resource and Environment,Hunan University of Technology and Business,Changsha 410083,China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2024年第2期261-267,共7页矿物冶金与材料学报（英文版）

基　　金：the National Natural Science Foundation of China(Nos.52204298 and 52004335);the National Key R&D Program of China(Nos.2022YFC2904502 and 2022YFC2904501);the Major Science and Technology Projects in Yunnan Province(No.202202AB080012);the Science Research Initiation Fund of Central South University(No.202044019).

摘　　要：The efficient separation of chalcopyrite(CuFeS2)and galena(PbS)is essential for optimal resource utilization.However,find-ing a selective depressant that is environmentally friendly and cost effective remains a challenge.Through various techniques,such as mi-croflotation tests,Fourier transform infrared spectroscopy,scanning electron microscopy(SEM)observation,X-ray photoelectron spec-troscopy(XPS),and Raman spectroscopy measurements,this study explored the use of ferric ions(Fe^(3+))as a selective depressant for ga-lena.The results of flotation tests revealed the impressive selective inhibition capabilities of Fe^(3+)when used alone.Surface analysis showed that Fe^(3+)significantly reduced the adsorption of isopropyl ethyl thionocarbamate(IPETC)on the galena surface while having a minimal impact on chalcopyrite.Further analysis using SEM,XPS,and Raman spectra revealed that Fe^(3+)can oxidize lead sulfide to form compact lead sulfate nanoparticles on the galena surface,effectively depressing IPETC adsorption and increasing surface hydrophilicity.These findings provide a promising solution for the efficient and environmentally responsible separation of chalcopyrite and galena.

关 键 词：GALENA CHALCOPYRITE ferric ions flotation separation surface oxidation 

分 类 号：TD952[矿业工程—选矿] TD923