Microscale insights into the influence of grinding media on spodumene micro-flotation using mixed anionic/cationic collectors  

作　　者：Liping Luo Longhua Xu Xinzhang Shi Jinping Meng Ruohua Liu 

机构地区：[1]Key Laboratory of Solid Waste Treatment and Resource Recycle Ministry of Education,Southwest University of Science and Technology,Mianyang 621010,China [2]State Key Laboratory for Environment-friendly Energy Materials,Southwest University of Science and Technology,Mianyang 621010,China [3]School of Resources Processing and Bioengineering,Central South University,Changsha 410000,China

出　　处：《International Journal of Mining Science and Technology》2022年第1期171-179,共9页矿业科学技术学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.51922091,51674207,and 52004337);the Sichuan Science and Technology Program(Nos.2019YFS0453,2018JY0148 and SYZ202074).

摘　　要：Here,the influence of grinding media with different shapes on the flotation performance of spodumene and its potential mechanism from microscale insights was investigated using a single mineral flotation experiment,X-ray diffraction(XRD)test,scanning electron microscopy combined with energy dispersive spectrometry(SEM-EDS),atomic force microscope(AFM)and X-ray photoelectron spectroscopy(XPS).The flotation data indicated that under anionic/cationic(sodium oleate(NaOL)/DDA)collectors system,the rod milled spodumene has a higher floatability than ball milled ones.XRD results confirmed that rod medium makes spodumene exposed more{110}and{100}planes,while ball medium makes spodumene exposed more{010}planes.The typical anisotropic surface of spodumene makes the surface of rod milled spodumene possess more Al sites,further confirmed by SEM-EDS and XPS results.Additionally,it was found that the rod milled spodumene presents a larger value of elongation and flatness,which are parameters closely related to bubble adhesion.AFM analysis indicated that rod milled products have a rougher surface,while ball milled products have a smoother surface.Consequently,the rod medium enhanced the adsorption of NaOL/DDA on the spodumene surfaces.This work provides theoretical guidance for optimizing the separation of spodumene from the perspective of grinding.

关 键 词：SPODUMENE FLOTATION Grinding media Shape index ROUGHNESS 

分 类 号：TD955[矿业工程—选矿] TD923