石炭科学会議発表論文集
Online ISSN : 2423-8309
Print ISSN : 2423-8295
ISSN-L : 2423-8295
第53回石炭科学会議
セッションID: No.2-7
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ガス化・燃焼 (6)、その他 (1)
No.2-7 粉砕速度定数分布モデルによる石炭粉砕特性の評価
園山 希
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会議録・要旨集 フリー

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We developed an evaluation method of grinding characteristics for a blend of coals with different grindability. HGI represents an initial grinding characteristic. We also developed a simple method for estimating a grinding rate constant distribution. An HGI test and a semi-continuous test by an HGI test equipment were conducted. Each averaged HGI calculated by feeding basis and mill accumulation basis was predicted by a first-order grinding-rate equation. When there was difference in HGI between blended coals, we could predict that the averaged HGI of the feeding basis was different from that of the mill accumulation basis. Grinding rate constant distribution was derived from a multicomponent consecutive grinding model for the semi-continuous test. Grinding rate constant distributions derived from the model were obtained and a blending ratio in a mill was predicted. The grinding rate constant distributions of high ash coal and low ash coal having approximately same HGI were different. Grinding rate constant distributions were used to predict a mill accumulation rate.

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