通讯作者：Li, GF (reprint author), Dalian Univ Technol, Sch Elect Engn, Dalian 116024, Peoples R China.
合写作者：Wang, Zhiqiang,Wang, Jinjun,Li, Guofeng
发表刊物：PLASMA SCIENCE & TECHNOLOGY
关键字：electrostatic separation; images processing; particle trajectory; numerical simulation; talcum
摘要：Electrostatic separation has been extensively used in mineral processing, and has the potential to separate gangue minerals from raw talcum ore. As for electrostatic separation, the particle charging status is one of important influence factors. To describe the talcum particle charging status in a parallel plate electrostatic separator accurately, this paper proposes a modern images processing method. Based on the actual trajectories obtained from sequence images of particle movement and the analysis of physical forces applied on a charged particle, a numerical model is built, which could calculate the charge-to-mass ratios represented as the charging status of particle and simulate the particle trajectories. The simulated trajectories agree well with the experimental results obtained by images processing. In addition, chemical composition analysis is employed to reveal the relationship between ferrum gangue mineral content and charge-tomass ratios. Research results show that the proposed method is effective for describing the particle charging status in electrostatic separation.