Role of ultraviolet modification in enrichment and upgrading of graphite ores via triboelectric separation

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology Pub Date : 2025-04-12 DOI:10.1016/j.apt.2025.104870

Jingfeng He, Zilin Zhang, Lixiang Fu, Helang Xu, Lingtao Zhu, Bin Yang

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Abstract

Graphite is an important mineral resource, in this era of growing global demand for high-grade graphite, the advancement of its purification and separation technology is of great significance. This paper focused on the enhancement of ultraviolet (UV) modification on the enrichment and purification of graphite ores. Through charge-to-mass ratio sensing, SEM and FTIR, it was found that the superficial properties of the modified graphite particles were smoother and flatter, and the amount of O-containing functional groups connected with C was reduced, which strengthened the full contact between graphite particles and friction rods with the graphite’s charging ability and improved the charge-to-mass ratio of graphite minerals. Accordingly, UV irradiation significantly improved the triboelectric separation performance, in which the separation efficiencies of graphite ores increased by up to 14.14 %. This work provided crucial information for resource purification and impurity elimination of graphite ores.

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紫外改性在石墨矿石摩擦电分离富集升级中的作用

石墨是一种重要的矿产资源，在这个全球对高品位石墨需求日益增长的时代，推进其提纯分离技术具有重要意义。本文主要研究了紫外改性对石墨矿石富集提纯的增强作用。通过电荷质量比传感、SEM和FTIR发现，改性后的石墨颗粒表面性能更加光滑平坦，与C连接的含o官能团的数量减少，这增强了石墨颗粒与摩擦棒的充分接触，提高了石墨矿物的电荷质量比。因此，紫外辐照显著提高了摩擦电分离性能，石墨矿石的分离效率提高了14.14%。该工作为石墨矿石的资源提纯和除杂提供了重要信息。

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来源期刊

Advanced Powder Technology 工程技术-工程：化工

CiteScore

9.50

自引率

7.70%

发文量

424

审稿时长

55 days

期刊介绍： The aim of Advanced Powder Technology is to meet the demand for an international journal that integrates all aspects of science and technology research on powder and particulate materials. The journal fulfills this purpose by publishing original research papers, rapid communications, reviews, and translated articles by prominent researchers worldwide. The editorial work of Advanced Powder Technology, which was founded as the International Journal of the Society of Powder Technology, Japan, is now shared by distinguished board members, who operate in a unique framework designed to respond to the increasing global demand for articles on not only powder and particles, but also on various materials produced from them. Advanced Powder Technology covers various areas, but a discussion of powder and particles is required in articles. Topics include: Production of powder and particulate materials in gases and liquids(nanoparticles, fine ceramics, pharmaceuticals, novel functional materials, etc.); Aerosol and colloidal processing; Powder and particle characterization; Dynamics and phenomena; Calculation and simulation (CFD, DEM, Monte Carlo method, population balance, etc.); Measurement and control of powder processes; Particle modification; Comminution; Powder handling and operations (storage, transport, granulation, separation, fluidization, etc.)