2020 Volume 72 Issue 11 Pages 424-432
:Spent refractories can be used for high-value applications, e.g., as refractory raw materials, if the corroded parts are sufficiently removed. Electrical pulse disintegration can cause a preferential fracture at the heterophase boundary in a pulverized object. This study applied electrical pulse disintegration to the treatment of spent refractories. The pulverizing experiment on MgO-based refractories corroded with slag by electrical pulse disintegration generated many free particles of undamaged and corroded parts. Calculation of the electric field intensity distribution following the application of an external electric field to the composite dielectric of undamaged and corroded parts showed that the electric field was concentrated around the interface. This means that local dielectric breakdown easily occurs around the interface. Moreover, it was estimated that particle fracture depends on its direction with respect to the electric field, and the influence of voltage is small.
