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

    Research output: Contribution to journalArticle

    1 Citation (Scopus)

    Abstract

    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.

    Original languageEnglish
    Pages (from-to)3-8
    Number of pages6
    JournalResources Processing
    Volume59
    Issue number1
    DOIs
    Publication statusPublished - 2012

    Fingerprint

    Comminution
    comminution
    recycling
    Recycling
    pretreatment
    Ore treatment
    mineral processing
    grinding
    Phase boundaries
    resource
    breakage
    design for environment
    minerals
    Grinding (comminution)
    Mineral resources
    structural component
    Disintegration
    Blasting
    mineral resource
    blasting

    Keywords

    • Comminution
    • Liberation
    • Physical separation
    • Resources separation

    ASJC Scopus subject areas

    • Environmental Chemistry
    • Nature and Landscape Conservation
    • Soil Science
    • Pollution

    Cite this

    Role of Comminution as a Pretreatment of Physical Concentration in Resources Recycling. / Owada, Shuji.

    In: Resources Processing, Vol. 59, No. 1, 2012, p. 3-8.

    Research output: Contribution to journalArticle

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