| 摘要 |
<p>PROBLEM TO BE SOLVED: To directly observe condition change in expansion and shrinkage in an inside of a coal-packed bed in a carbonization process, which is a key for revealing coke strength. SOLUTION: A container 11 packed with coal 12 is positioned between temperature-controllable heating bodies 13 provided facing each other inside a carbonization furnace 6, soft X-rays are transmitted to a cross-section where the whole face parallel to heating faces of the heating bodies 13 has the substantially same temperature from an X-ray generating tube 2 arranged outside the furnace 6 during temperature elevation by heating a coal-packed bed inside the container 11 by the heating bodies 13, they are detected by an X-ray detector 3, tommographic images of the coal-packed bed are consecutively provided, and expansion and shrinkage inside the coal-packed bed is thereby observed. Plural tommographic images different in temperatures provided during the temperature elevation by heating the coal-packed bed are analyzed each other, a difference between picture elements in the same position is found, and an expansion region and a shrinkage region which are a key for revealing coke strength are specified based on a resultant differential image.</p> |
