Selective flotation of galena and sphalerite using N-(phosphonomethyl)iminodiacetic acid as an eco-friendly depressant  

作　　者：Zzihao Wang Guang Han Qicheng Feng 

机构地区：[1]State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization,Faculty of Land Resource Engineering,Kunming University of Science and Technology,Kunming 650093,China [2]Yunan Key Laboratoryof Green Searaton and Eichment of Stratgic Mineral Rsources,Kunming Unversiyf Scince and Techogy,Kunming 60093,China

出　　处：《Green and Smart Mining Engineering》2024年第1期96-103,共8页绿色与智能矿业工程（英文）

基　　金：supported by the National Natural Science Foundation of China (No.52264026);Yunnan Fundamental Research Projects (No.202301AW070018).

摘　　要：This study explored the use of N-(phosphonomethyl)iminodiacetic acid(PMIDA)as an eco-friendly depressant for the selective flotation of galena and sphalerite.Microflotation tests were performed to assess the effectiveness of PMIDA.Moreover,the depression mechanism of PMIDA was analyzed through solution chemistry calculations,zeta potential measurements,contact angle determination,X-ray photoelectron spectroscopy,and densityfunctional theory calculations.Solution chemistry calculations revealed that the presence of PMIDA as PMIDA3-ions in the pulp optimized the depressive effect on sphalerite.Additionally,contact angle results indicated a significant improvement in the surface hydrophilic of sphalerite after PMIDA treatment.Zeta potential measurements revealed that the adsorption capacity of xanthate on the sphalerite surface after PMIDA treatment significantly decreased.X-ray photoelectron spectroscopy analyses indicated that the adsorption of PMIDA on the sphalerite surface was associated with the phosphate functional groups of PMIDA.Density-functional theory simulation data indicated preferential adsorption of PMIDA on the sphalerite surface.These results indicate the potential of PMIDA as a promising depressant to inhibit the flotation of sphalerite and facilitate the selective flotation of galena.

关 键 词：SPHALERITE GALENA N-(phosphonomethyl)iminodiacetic acid Selective flotation 

分 类 号：TF811[冶金工程—有色金属冶金]