Abstract
IGCC is expected to expand fuel for power generation and to reduce carbon dioxide emission. Therefore it is important to establish and expand the way to reuse IGCC slag, coal ash from IGCC power station, as a resource. Focusing on foaming characteristic of IGCC slag, we succeeded in establish the way to control bulk density of slag balloon precisely and find out promising technique to promote foaming of IGCC slag. And the possibility was found that ultra light-weight slag balloon from IGCC slag can substitute expanded obsidian as material for soil drainage improvement or green-roof. Production cost of ultra light-weight slag balloon is expected as much lower than market price of expanded obsidian.
