Influence of microwave treatment on grinding and dissociation characteristics of vanadium titano-magnetite

论文摘要

The effect of microwave treatment on the grinding and dissociation characteristics of vanadium titano-magnetite（VTM） ore were investigated using scanning electron microscopy（SEM）, nitrogen absorption measurements, particle size distribution measurements, X-ray diffraction（XRD） analysis, Fourier transform infrared（FT-IR） spectroscopic analysis, and magnetic separation. SEM analysis showed that microfractures appeared in the microwave-treated VTM, which is attributed to the microwaves’ selective heating characteristic and the differential expansion between minerals and gangues. Nitrogen absorption showed that the microfractures were more pronounced when the microwave heating time was increased. Particle size distribution analysis showed that microwave treatment could improve the grindability of the VTM, thus increasing the weight percent of the fine-ground product. The increase in grindability was more significant with prolonged heating time. Moreover, the particle size distribution of the fine-ground product changed only slightly after the microwave treatment. XRD analysis showed that the crystallinity of the microwave-treated VTM increased with increasing microwave heating time. The magnetic separation tests revealed that the separation efficiency increased as a result of the intergranular fractures generated by microwave treatment. The Fe grade of the magnetic fraction of microwave-treated VTM was 1.72% higher than that of the raw ore. We concluded that the microwave treatment was beneficial, especially for the mineral processing characteristics.

论文目录

文章来源

类型: 期刊论文

作者: Jun-peng Wang,Tao Jiang,Ya-jing Liu,Xiang-xin Xue

来源: International Journal of Minerals Metallurgy and Materials 2019年02期

年度: 2019

分类: 工程科技Ⅱ辑,工程科技Ⅰ辑

专业: 冶金工业

单位: School of Metallurgy, Northeastern University,Key Laboratory of Liaoning Province for Recycling Science of Metallurgical Resources

基金: financially supported by the National Natural Science Foundation of China (Nos. 51574082 and 51874077),the Fundamental Research Funds for the Central University of China (Nos. N150202001 and N172507012)

分类号: TF046

页码: 160-167

总页数: 8

文件大小: 948K

下载量: 26

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