Interaction mechanism of ferrate(Ⅵ) with arsenopyrite surface and its effect on flotation separation of chalcopyrite from arsenopyrite  

高铁酸盐(Ⅵ)与毒砂表面的作用机理及其对黄铜矿与毒砂浮选分离的影响

作　　者：Run-peng LIAO Pan-jin HU Shu-ming WEN Yong-xing ZHENG Xian-hui QIU Jin-fang LÜ Jian LIU 廖润鹏;胡盘金;文书明;郑永兴;邱仙辉;吕晋芳;刘建(昆明理工大学省部共建复杂有色金属资源清洁利用国家重点实验室,昆明650093;昆明理工大学国土资源工程学院,昆明650093;江西理工大学资源与环境工程学院,赣州341000)

机构地区：[1]State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization,Kunming University of Science and Technology,Kunming 650093,China [2]Faculty of Land Resource Engineering,Kunming University of Science and Technology,Kunming 650093,China [3]Faculty of Resource and Environmental Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China

出　　处：《Transactions of Nonferrous Metals Society of China》2022年第11期3731-3743,共13页中国有色金属学报（英文版）

基　　金：the National Natural Science Foundation of China(Nos.52074139,51904129);Basic Research Project of Yunnan Province,China(No.202001AU070028);Basic Research Project for High-level Talents of Yunnan Province,China(No.KKS2202152011);Open Foundation of State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization,China(No.CNMRCUKF1602);the Testing and Analyzing Funds of Kunming University of Science and Technology,China(No.2020T20150055).

摘　　要：Potassium ferrate(K_(2)FeO_(4)) was used as a novel environmental-friendly depressant,and its inhibition effect on flotation performance of arsenopyrite and chalcopyrite using potassium ethyl xanthate(PEX)as a collector was investigated by flotation experiments,contact angle measurements,adsorption measurements,localized electrochemical impedance spectroscopy(LEIS)measurements,and X-ray photoelectron spectroscopy(XPS)analyses.The results showed that K_(2)FeO_(4)strongly depressed arsenopyrite in a pH range of 4−11,and the flotation separation of chalcopyrite from arsenopyrite could be realized in the presence of 5×10^(−4)mol/L K_(2)FeO_(4)and 5×10^(−5)mol/L PEX at pH 8 or 10.In the presence of K_(2)FeO_(4) and PEX,the contact angle and the xanthate adsorption capacity of arsenopyrite decreased significantly.LEIS measurements showed that the addition of ferrate could significantly increase the impedance of the arsenopyrite surface.XPS analyses further confirmed that ferrate accelerated the oxidation of arsenopyrite surface.通过浮选试验、接触角测量、吸附量测试、交流阻抗测试和XPS分析研究一种新型环保抑制剂高铁酸钾(K_(2)FeO_(4))在乙基黄药捕收剂体系下对毒砂和黄铜矿的抑制作用。结果表明,在pH值为4~11的范围内,高铁酸钾强烈抑制毒砂,在pH 8或10时,采用5×10^(−4)mol/L K_(2)FeO_(4)和5×10^(−5)mol/L PEX可以实现黄铜矿与毒砂的浮选分离。在K_(2)FeO_(4)和PEX存在时,毒砂的接触角和黄药吸附量显著降低。LEIS测量表明,高铁酸盐的加入可以显著增加毒砂表面的阻抗。XPS分析进一步证实,高铁酸盐加速毒砂表面的氧化。

关 键 词：ferrate(Ⅵ) ARSENOPYRITE CHALCOPYRITE low-alkalinity flotation separation 

分 类 号：TD952[矿业工程—选矿] TD923