Role of surface roughness in the magnesite flotation and its mechanism

作     者：Zhanglei Zhu Yafeng Fu Wanzhong Yin Haoran Sun Keqiang Chen Yuan Tang Bin Yang Zhanglei Zhu;Yafeng Fu;Wanzhong Yin;Haoran Sun;Keqiang Chen;Yuan Tang;Bin Yang

作者机构：School of Resources and Civil EngineeringNortheastern UniversityShenyang 110819China Ansteel Beijing Research Institute CO.LTD.Beijing 102200China Genetic Mineral Processing Research CenterNortheastern UniversityShenyang 110819China 

出 版 物：《Particuology》 (颗粒学报（英文版）)

年 卷 期：2022年第20卷第3期

页      面：63-70页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 0817[工学-化学工程与技术] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：This work was financially supported from the National Natural Science Foundation of China(grant nos.51874072 and 51974064) 

主　　题：Surface roughness Active adsorption site Collector adsorption capacity Flotation performance 

摘      要：Surface roughness has a significant influence on mineral *** assisting effect of surface roughness on minerals flotation is extensively investigated from its physical properties(e.g.,the existing form of asperity and its size),however,the associated effect on mineral flotation based on the differences in surface chemical property caused by surface roughness has been rarely *** such a question in mind,in this study,we investigated the flotation recoveries of two batches of magnesite particles with varying degree of surface roughness produced by two different mills,and associated the flotation performances to their surface chemical properties(amount of adsorption sites for the collector)via a series of detections,including Scanning Electron Microscope-Energy Dispersive Spectrometry(SEM-EDS)observations,X-ray photoelectron spectroscopy(XPS)analysis,adsorption capacity tests,and contact angle ***,we concluded that rougher magnesite particles could provide more active sites(Mg^(2+))for a larger capacity of sodium oleate(NaOL),thereby improving the hydrophobicity and floatability.