Electromagnetic Field Analysis on the Behavior of Selective Breakage at Phase Boundary in Electrical Disintegration

Hayashi, Rintaro; Urabe, Takehiro; Owada, Shigeki

doi:10.1007/978-94-007-3010-6_24

Cited by 1 publication

(1 citation statement)

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“…Driving force of the selective breakage was also demonstrated with electromagnetic field analysis 25 . Since the value of tensile strength is generally one several tens of pressure strength, then, the energy required for breakage should be much lower than usual mechanical comminution.…”

Section: Electrical Disintegrationmentioning

confidence: 96%

Role of Comminution as a Pretreatment of Physical Concentration in Resources Recycling

Owada

2012

Resources Processing

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This paper demonstrates the importance of comminution for achieving compositional liberation in order to establish an effective solid-solid separation process, in especial, in the field of mineral processing and resources recycling. We have developed a unique liberation model in comminution process by introducing an index of "preferential breakage probability", e1, at phase boundary to the Wiegel model, which is well known in the field of mineral processing. From the results, we easily understood that the degree of liberation gradually increased with increasing the e1 and it could be demonstrated that the energy required for obtaining a certain degree of liberation dramatically decreased with increasing the e1. This calculation indicated the importance of preferential breakage at phase boundary in comminution with lower energy consumption, which could contribute better separation efficiency in the following solid-solid separation. In other words, the e1 must become a good index for the DfR (Design for Recycling) as an "EcoDesign" from the viewpoint of compositional separation. The paper also describes several recent approaches to obtain a good liberation of structural components in comminution, such as (semi)-autogenous grinding, surface grinding, blasting in water, microwave pretreatment, and electrical disintegration.

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Section: Electrical Disintegrationmentioning

confidence: 96%