36.石炭の簡易脱灰技術の基礎検討 : 灰分除去特性におよぼす石炭中灰分分布状態の影響

抄録

The mineral distribution in the raw coal was investigated to develop an effective removal method of mineral matter. The influence of the mineral distribution on removal ratio of mineral matter from coal was evaluated by specific gravity separation. It was found that minerals with line shape or cloudy shape were difficult to remove from coal. And also the analysis of mineral distribution using photomicrograph was investigated. This result showed that mineral distribution in coal was estimated by distinguish method between mineral and organic matter using brightness distribution obtained from the photomicrograph, and the ratio of maximum length to diameter was suitable shape factor of mineral matter.