Experimental study on purification of low grade magnesite by triboelectrostatic beneficiation

被引：0
作者：
Zhao X. [1 ]
Wang H. [1 ]
Li Y. [1 ]
Yang J. [1 ]
Peng Z. [1 ]
机构：
[1] School of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou
来源：
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2019年 / 50卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Charing; Magnesite; PVC particle; Triboelectrostatic beneficiation;
D O I：
10.11817/j.issn.1672-7207.2019.01.002
中图分类号：
学科分类号：
摘要：
In order to effectively utilize the low grade magnesite and reduce the purification cost of magnesite, the low grade magnesite was sorted and purified by triboelectric beneficiation. After the basic analysis of low-grade magnesite with X-ray fluorescence(XRF) and scanning electron microscope(SEM), the charge properties of pure magnesite and quartz (more than 47.00% and 99.00%) after the collision with different plastic particles were studied respectively. The grade of 40.80% magnesite was prepared by pure magnesite and quartz with the mass ratio of 6:1. The results show magnesite and quartz charge differently after having friction with PVC particles. The magnesite surface charge is +3.57 nC/g, while the quartz surface charge is -5.56 nC/g. The 3 mm PVC particles are filled as the friction medium in the lab-made triboelectrostatic separator. The MgO grade and recovery rate are 45.09% and 68.40% at 15 kV voltage, with wind speed being 60 m3/h and feed rate being 4.5 g/s. The triboelectrostatic beneficiation can remove SiO2 from low grade magnesite effectively. © 2019, Central South University Press. All right reserved.
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页码：9 / 14
页数：5
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