期刊
INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY
卷 32, 期 1, 页码 171-179出版社
ELSEVIER
DOI: 10.1016/j.ijmst.2021.09.009
关键词
Spodumene; Flotation; Grinding media; Shape index; Roughness
资金
- National Natural Science Foundation of China [51922091, 51674207, 52004337]
- Sichuan Science and Technology Program [2019YFS0453, 2018JY0148, SYZ202074]
This study investigated the influence of grinding media with different shapes on the flotation performance of spodumene and its potential mechanism from microscale insights. The results showed that rod milled spodumene exhibited higher floatability compared to ball milled ones under anionic/cationic collectors system. The rod medium enhanced the adsorption of collectors on the spodumene surfaces, which can be attributed to the exposure of specific crystal planes and the rougher surface of rod milled products.
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 (11 0) and (100) planes, while ball medium makes spo-dumene 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 flat-ness, 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. (C) 2021 Published by Elsevier B.V. on behalf of China University of Mining & Technology.
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