Abstract：To improve the problem of overgrinding and dust in the mechanical grinding of magnesite ores, the fragmentation characteristics of magnesite ores were experimentally studied by pulsed high-voltage discharge in water. magnesite ores, approximately 6cm and 8cm in diameter, were respectively processed at -25kV. The morphology and composition of fragmented products were analyzed by microscope imaging, SEM and energy spectrum. In addition, shock wave pressure in the fragmentation process was studied. The results show that fragmentation types of magnesite ores are mainly dissociation fragmentation and mixed fragmentation. The mass distribution ratio of particles below 150μm is less than 10%, and the useful mineral monomer particles with micron grade are produced, which provides favorable conditions for subsequent separation of magnesite ores. Energy conversion efficiency in the fragmentation process is 15.64%, which agrees with relevant theoretical research results.
王志强, 曹云霄, 邢政伟, 王进君, 李国锋. 高压脉冲放电破碎菱镁矿石的实验研究[J]. 电工技术学报, 2019, 34(4): 863-870.
Wang Zhiqiang, Cao Yunxiao, Xing Zhengwei, Wang Jinjun, Li Guofeng. Experimental Study on Fragmentation of Magnesite Ores by Pulsed High-Voltage Discharge. Transactions of China Electrotechnical Society, 2019, 34(4): 863-870.
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2019, Vol. 34 
