Study on removal characteristics of mineral matter from coal by physical separation. (2nd Report). Size Distribution and Liberation of Mineral Matter in Coal.

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  • 物理的選別法による石炭の脱灰性に関する研究　（第２報）　石炭中の鉱物質の粒度分布および単体分離性について
  • ブツリテキ センベツホウ ニ ヨル セキタン ノ ダッカイセイ ニ カンスル
  • Study on removal characteristics of mineral matter from coal by physical separation (2 nd Report)
  • 物理的選別法による石炭の脱灰性に関する研究 (第2報)

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Abstract

Mineral matters in six coal samples from different localities were classified into four groups; A) mainly quartz, B) pyrite, C) mainly clay minerals and D) iron oxide. The size distribution and liberation degree of each group mineral were measured using an image analyzer equipped with a microscope. Minerals of A, B and D groups were easily liberated from coal by grinding. On the other hand, C group minerals were easily crushed but often remained and attached to the coal particles. Based on the results measured and observed, a liberation model was proposed to evaluate the liberation behaviour of the minerals. Using the model, liberation degrees were calculated and the values agreed well with the measured values.

Journal

  • Shigen-to-Sozai

    Shigen-to-Sozai 110 (6), 467-472, 1994

    The Mining and Materials Processing Institute of Japan

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