Triboelectric characteristics of magnesite and quartz and investigation of triboelectric separation of magnesite
DOI:
https://doi.org/10.17159/Abstract
Tribo-electrostatic separation is a promising method for effectively utilizing low-grade magnesite resources by removing quartz and improving the grade of magnesite. To determine the charge-to-mass ratio of pure magnesite and quartz, a triboelectric measurement system was employed, and a tribo-electrostatic separation system was used to separate low-grade magnesite in the lab. The results showed that the maximum difference in charge-to-mass ratio between pure magnesite and quartz particles was observed after friction with PVC (Polyvinyl chloride). The grade and recovery of magnesite increased with rising temperature and initially increased with increasing voltage, feeding rate, and air flow rate before gradually decreasing. The optimal conditions resulted in a concentrate with 46.91% MgO content and 77.36% recovery, while the quartz content decreased from 7.02% to 1.95%. These experimental results demonstrate the effectiveness and potential of tribo-electrostatic separation in removing quartz and upgrading magnesite.
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Copyright (c) 2024 Zhenxing Zhang, Yongqiang Xu, Haifeng Wang, Jilan Shi, Jiahui Niu, Zihui Zhang
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