Role of tannin pretreatment in flotation separation of magnesite and dolomite

作     者：Xiufeng Gong Jin Yao Jun Guo Bin Yang Haoran Sun Wanzhong Yin Yulian Wang Yafeng Fu Xiufeng Gong;Jin Yao;Jun Guo;Bin Yang;Haoran Sun;Wanzhong Yin;Yulian Wang;Yafeng Fu

作者机构：School of Resources and Civil EngineeringNortheastern UniversityShenyang 110819China Key Laboratory of Solid Waste Treatment and Resource Utilization of the Ministry of EducationSouthwest University of Science and TechnologyMianyang 621010China School of Chemical EngineeringChina University of Mining and TechnologyXuzhou 221116China School of Materials Science and EngineeringShenyang Ligong UniversityShenyang 110159China Ansteel Beijing Research Institute Co.Ltd.Beijing 102200China 

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3期

页      面：452-461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] 0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China (Nos.51974064,52174239,and 52374259) the Open Project of the Key Laboratory of Solid Waste Treatment and Resource Utiliza-tion of the Ministry of Education,China (No.23kfgk02) 

主　　题：tannin pretreatment selective inhibition flotation separation magnesite dolomite 

摘      要：Flotation separation of magnesite and its calcium-containing carbonate minerals is a difficult ***,new regulat-ors have been proposed for magnesite flotation decalcification,although traditional regulators such as tannin,water glass,sodium carbon-ate,and sodium hexametaphosphate are more widely used in ***,they are rarely used as the main regulators in research because they perform poorly in magnesite and dolomite single-mineral flotation *** by the limonite presedimentation method and the addition of a regulator to magnesite slurry mixing,we used a tannin pretreatment method for separating magnesite and *** experiments confirmed that the tannin pretreatment method selectively and largely reduces the flotation recovery rate of dolomite without affecting the flotation recovery rate of ***,the contact angles of the tannin-pretreated magnesite and dolomite increased and decreased,respectively,in the presence of *** potential and Fourier transform infrared analyses showed that the tannin pretreatment method efficiently hinders NaOl adsorption on the dolomite surface but does not affect NaOl adsorption on the magnesite surface.X-ray photoelectron spectroscopy and density functional theory calculations confirmed that tannin interacts more strongly with dolomite than with magnesite.