硫酸锌和碳酸钠抑制滑石浮选机理  

Depression mechanism of ZnSO_(4)and Na_(2)CO_(3)on talc flotation

作　　者：李佳磊[1] 马印禹 李广利 刘志成 宁帅 裴斌 郎召有 刘瑞增 刘殿文[1,4] Jia-lei LI;Yin-yu MA;Guang-li LI;Zhi-cheng LIU;Shuai NING;Bin PEI;Zhao-you LANG;Rui-zeng LIU;Dian-wen LIU(Faculty of Land Resources Engineering,Kunming University of Science and Technology,Kunming 650093,China;Xilingol League Shandong Gold Alhada Mining Co.,Ltd.,Xilingol 026300,China;Yunnan Chihong Zn&Ge Co.,Ltd.,Qujing 655000,China;Yunnan Key Laboratory of Green Separation and Enrichment of Strategic Mineral Resources,Kunming 650093,China)

机构地区：[1]昆明理工大学国土资源工程学院,昆明650093 [2]锡林郭勒盟山金阿尔哈达矿业有限公司,锡林郭勒026300 [3]云南驰宏锌锗股份有限公司,曲靖655000 [4]云南省战略金属矿产资源绿色分离与富集重点实验室,昆明650093

出　　处：《Transactions of Nonferrous Metals Society of China》2023年第5期1559-1571,共13页中国有色金属学报（英文版）

基　　金：the National Natural Science Foundation of China(No.52074138);the Fundamental Research Project of Yunnan Province,China(No.202001AS070030);the Analysis and Testing Foundation of Kunming University of Science and Technology,China(No.2018M20162101102).

摘　　要：通过浮选试验、溶液化学计算和多种表征技术,深入研究硫酸锌和碳酸钠在黄铜矿和辉钼矿浮选中对滑石的抑制机理。浮选试验表明,在pH值为7~9的范围内滑石浮选得到有效抑制。在该pH范围内,对硫酸锌和碳酸钠混合溶液的溶液化学计算表明,碱式碳酸锌是主要的含锌物种;X射线衍射和红外光谱分析进一步证明了这一点。Zeta电位测试表明:在滑石抑制发生的pH范围内,碱式碳酸锌表面带正电荷,而滑石表面带负电荷。X射线光电子能谱和场发射扫描电子显微镜证实:经硫酸锌和碳酸钠混合溶液处理的滑石颗粒表面存在含锌沉淀物。结果表明,由于静电吸引,形成的碱式碳酸锌与滑石发生异相聚沉,从而抑制滑石浮选。The depression mechanism of a combination of ZnSO_(4)and Na_(2)CO_(3)on talc during chalcopyrite and molybdenite flotation was investigated in-depth using flotation tests,solution speciation calculations,and various characterization techniques.Flotation tests indicate that the effective depression of talc flotation occurred in the pH range of 7−9.In this pH range,speciation calculations for the mixed solution of ZnSO_(4)and Na_(2)CO_(3)showed that the Zn_(5)(OH)_(6)(CO_(3))_(2)precipitate was the predominant zinc-bearing species,which was further proven by X-ray diffraction and infrared spectroscopy measurements.Zeta potential measurement highlighted that the Zn_(5)(OH)_(6)(CO_(3))_(2)precipitate was positively charged while the talc surface was negatively charged in the pH range where talc depression occurred.X-ray photoelectron spectroscopy and field emission scanning electron microscopy confirmed the presence of the zinc-bearing precipitate on the surface of the talc particles treated by the combination of ZnSO_(4)and Na_(2)CO_(3).These findings suggested that heterocoagulation between the formed Zn_(5)(OH)_(6)(CO_(3))_(2)and talc occurred mainly due to the electrostatic attraction,thereby leading to the depression of talc flotation.

关 键 词：滑石 浮选分离 抑制 异相聚沉 静电吸引 碱式碳酸锌 

分 类 号：TD95[矿业工程—选矿] TD923