Journal of the Japan Institute of Energy
Online ISSN : 1882-6121
Print ISSN : 0916-8753
ISSN-L : 0916-8753
Basic Study on Mineral Removal from Coal
Study on Mineral Distribution and Characteristics of Mineral Removal Using Specific Gravity Separation
Yoshiko HIEIHiromi SHIRAI
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2004 Volume 83 Issue 9 Pages 733-739


Increasing the coal demand in the future, the industry has to utilize kinds of unused coals such as highash type of coals. Therefore, the mineral removal technology from raw coal is important to improve trans-portability, and to decrease the cost of ash treatments. In this study, 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 the removal of small minerals with line shape or cloudy shape minerals from coal were difficult. And also the effect on elimination of inorganic trace elements with mineral removal was examined. The content of the inorganic trace elements decreased with increasing mineral removal ratio. These results showed that mineral removal from raw coal could eliminate inorganic trace elements at the same time.

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