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Numerical simulation of high voltage electric pulse comminution of phosphate ore

查看全文 作　　者：Razavian Seyed [1]Mohammad;Rezai [1]Bahram;Irannajad [1]Mehdi;Ravanji Mohammad [2]Hasan 高影响力作者 机构地区：[1]Department of Mining and Metallurgical Engineering,Amirkabir University of Technology;[2]Department of Electrical Engineering,Sharif University of Technology高影响力机构 出　　处：《International Journal of Mining Science and Technology》索引2015年第25卷第3期,共6页高影响力期刊 摘　　要：Numerical simulation of the electrical field distribution helps in-depth understanding of the mechanisms behind the responses and the benefits of the high voltage pulse comminution. The COMSOL Multiphysics package was used to numerically simulate the effect of ore compositions in this study. Regarding phosphate ore particles shape and composition, the effects of mineral composition, particle size, particle shape and electrodes distance were investigated on the electrical field intensity and distribution. The results show that the induced electrical field is significantly dependent on the electrical properties of minerals,the feed particle size and the location of conductive minerals in ores. The angle of material contact surface with the discharge electrode is also an important factor in the intensity of electrical field. Moreover,it is found that the specific liberation effect at the disintegration of phosphate ore by electrical pulses is due to the locality of the electrical field at the interface of mineral components of the phosphate ore aggregates with different permittivities. However, the intensity of the electrical field increases with sharpening the contact angle. Besides, the electrical discharge in the samples is converted to the electrohydraulic discharge across the surrounding water by changing the distance between the discharge electrode and sample surface. 关 键 词：高压电脉冲 磷酸盐矿 数值模拟 粉碎 放电电极 电场分布 矿物成分 电场强度
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