Written in English
Thesis (Ph. D.)--The Queens" University of Belfast, 1971.
|The Physical Object|
Abstract High voltage breakage is a relatively novel comminution technology that uses highly energetic electrical discharges to induce electrical breakdown in rocks. Advantages of the technology in terms of weakening of rocks to ease comminution, as well as improved liberation compared to mechanical fragmentation methods have been. It was demonstrated that, due to breakage of the rock surface by electric discharges, the rock excavation volume (breakage performance) is significantly improved as compared to conventional. High voltage breakage is a novel comminution method that relies on highly energetic electrical pulses to weaken or fully fragment rocks. The potential of this technology to improve liberation and. Download Citation | Rock breakage by pulsed electric discharges | The electric pulse method applied to study the granite and concrete breakage at decimeter spacing between electrodes in water and.
Abstract: A high voltage kV, kJ pulse generator was used to produce discharges within rock specimens and cause their mechanical disintegration. Electrical parameters of the crushing pulse were measured to investigate the growth of the discharge process. The speed of growth of a breakdown channel through the rock structure was shown to be a strong function of the applied pulse voltage. However, a more efficient method of rock breakage using high voltage electrical pulses has been developed on the basis of EHD technology. Within the new technique, the energy of the high voltage. High voltage breakage is a novel comminution method that relies on highly energetic electrical pulses to weaken or fully fragment rocks. The potential of this technology to improve liberation and increase the grindability of ores has been demonstrated previously, but . Abstract and Figures High voltage breakage is a novel comminution method that relies on highly energetic electrical pulses to weaken or fully fragment rocks. The potential of this technology to.
After that, the discharge always happens when the following pulses are applied separately. Moreover, the discharging time T d is μs when the third high voltage pulse is applied, while it decreases quickly to minimum when the following high voltage pulses are applied, as shown in figure 6. The rock is broken down by the high-voltage electric field first, and a plasma channel is generated. Then, the stored energy in the power supply is injected into the plasma channel. As the plasma channel expands, stress is generated. When this stress exceeds the rock strength, the rock will break. Electromagnetic Field Analysis on the Behavior of Selective Breakage at Phase Boundary in Electrical Disintegration. (): Electrical disintegration of rock, Mineral T., Yoshimi, I., Tanaka, Y., Jeyadevan, B., and Miyazaki, T. (): Research of liberation by using high voltage discharge impulse and electromagnetic. Partial Discharge is a localized dielectric breakdown which bridges the insulation between electrodes. In high voltage electrical system several solid, liquid and gaseous materials are used for the purpose of insulation. The insulators used in the power system are not % perfect. The presence of air bubbles degrades the quality of insulator.