EXPANSIBLE MATERIAL AND EXPANSIBLE COMPOSITION

摘要

PROBLEM TO BE SOLVED: To provide an efficient method of use capable of making more ash generated during coal combustion by a pressure fluidized bed boiler to be a utilization object regardless of the magnitude of variations of ingredients.SOLUTION: An expansible material is a baked product of (A) PFBC ash of 100 pts.mass, (B) caustic lime of 300 to 1000 pts.mass or a calcium salt generating 300 to 1000 pts.mass of calcium oxide by thermal decomposition with baking, and has a percentage content of free caustic lime of 40 to 80 mass%.