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 Qiancheng Zhang;Limin Zhang;Feng Jiang;Honghu Tang;Li Wang;Wei Sun

作者机构：School of Minerals Processing and BioengineeringCentral South UniversityChangsha 410083China Engineering Research Center of Ministry of Education for Carbon Emission Reduction in Metal Resource Exploitation and UtilizationChangsha 410083China School of Resource and EnvironmentHunan University of Technology and BusinessChangsha 410083China 

出 版 物：《International Journal of Minerals,Metallurgy and Materials》 (矿物冶金与材料学报（英文版）)

年 卷 期：2024年第31卷第2期

页      面：261-267页

核心收录：

学科分类：0819[工学-矿业工程] 081902[工学-矿物加工工程] 08[工学] 0806[工学-冶金工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 

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). 

主　　题：galena chalcopyrite ferric ions flotation separation surface oxidation 

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.