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Numerical simulation of high voltage electric pulse comminution of phosphate ore

Razavian, S. M ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1016/j.ijmst.2015.03.023
  3. Abstract:
  4. 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
  5. Keywords:
  6. Electrical comminution ; High voltage electric pulse ; Numerical simulation ; Phosphate ore ; Comminution ; Computer simulation ; Electric discharges ; Electrodes ; Grinding (comminution) ; Minerals ; Numerical models ; Particle size ; Phosphate ore treatment ; Electric pulse ; Electrical comminutions ; Electrical field distributions ; Electrical field intensities ; Electro-hydraulic discharge ; In-depth understanding ; Induced electrical field ; Phosphate ores ; Ores
  7. Source: International Journal of Mining Science and Technology ; Volume 25, Issue 3 , 2015 , Pages 473-478 ; ISSN: 20952686
  8. URL: http://www.sciencedirect.com/science/article/pii/S2095268615000658