Journal of MMIJ
Online ISSN : 1884-0450
Print ISSN : 1881-6118
ISSN-L : 1881-6118
Original Paper
Investigation of Liberation Mechanism of Electronic Scrap by Impact Energy Measurements and DEM Simulations
Takuya TATSUMOTOYuki TSUNAZAWATaketoshi KOITAYutaro TAKAYAKeishi OYAMAChiharu TOKORO
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JOURNAL OPEN ACCESS

2023 Volume 139 Issue 11_12 Pages 52-62

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Abstract

To clarify the mechanism of liberation in the comminution process of electronic scrap (e-scrap), we attempted to express the degree of liberation by first-order kinetic equation related to impact energy. Breakage energy measurements, comminution experiments, and discrete element method (DEM) simulations were conducted on two types of e-scrap with relatively simple structures. The mechanism of the liberation was estimated from the observation of the fractions in the comminution experiments. The results of the breakage energy measurements and DEM simulations supported the mechanism in terms of impact energy. The results of fitting first-order kinetic equations based on the cumulative specific impact energy from the DEM simulations and the degree of liberation in the experiments showed a high correlation. The fitting parameters of the firstorder kinetic equations were compared confirmed to be consistent with the mechanism of liberation and the breakage energy measurements, suggesting the numerical validity of the equations. In conclusion, it was shown that for e-scrap with relatively simple structures, the first-order kinetic equations of the cumulative specific impact energy calculated by DEM simulations can be used to evaluate the degree of liberation.

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© 2023 The Mining and Materials Processing Institute of Japan

この記事はクリエイティブ・コモンズ [表示 - 非営利 - 改変禁止 4.0 国際]ライセンスの下に提供されています。
https://creativecommons.org/licenses/by-nc-nd/4.0/deed.ja
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