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Simulation of Electrical and Thermal Properties of Granite under the Application of Electrical Pulses Using Equivalent Circuit Models Fukushima, Kyosuke Kabir, Mahmudul Kanda, Kensuke Obara, Naoko Fukuyama, Mayuko Otsuki, Akira open access © 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). electric field temperature distribution conductivity dielectric constant liberation hard-rock mineral distribution Since energy efficiency in comminution of ores is as small as 1% using a mechanical crushing process, it is highly demanded to improve its efficiency. Using electrical impulses to selectively liberate valuable minerals from ores can be a solution of this problem. In this work, we developed a simulation method using equivalent circuits of granite to better understand the crushing process with high-voltage (HV) electrical pulses. From our simulation works, we calculated the electric field distributions in granite when an electrical pulse was applied. We also calculated other associated electrical phenomena such as produced heat and temperature changes from the simulation results. A decrease in the electric field was observed in the plagioclase with high electrical conductivity and void space. This suggests that the void volume in each mineral is important in calculating the electrical properties. Our equivalent circuit models considering both the electrical conductivity and dielectric constant of a granite can more accurately represent the electrical properties of granite under HV electric pulse application. These results will help us better understand the liberation of minerals from granite by electric pulse application. MDPI 2022 eng journal article VoR http://hdl.handle.net/10295/00006258 https://air.repo.nii.ac.jp/records/5946 https://doi.org/10.3390/ma15031039 MATERIALS 15 3 https://air.repo.nii.ac.jp/record/5946/files/riA_2022_25.pdf application/pdf 2.7 MB 2023-02-23