主催: 日本エネルギー学会 石炭科学部会, 日本エネルギー学会 コークス工学研究部会
共催: 日本学術振興会 石炭・炭素資源利用技術第148委員会, 化学工学会 エネルギー部会, 日本エネルギー学会 重質油部会, 日本エネルギー学会 ガス化部会, 日本エネルギー学会 燃焼部会
会議名: 第53回石炭科学会議
回次: 53
開催地: 福山市生涯学習プラザ(広島県福山市)
開催日: 2016/10/26 - 2016/10/27
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.