| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an inorganic foamed, fired body obtained by using, as a main component, ash produced by incinerating municipal wastes, which is made more porous. <P>SOLUTION: The inorganic foamed, fired body is formed from a raw material mixture blended so as to satisfy following composition condition (a) containing ash obtained by incinerating municipal wastes, and a foaming agent in which an iron oxide, silicon carbide and carbon are added so as to satisfy following composition condition (b) and then is produced by firing the formed body at a temperature between 1,000 to 1,250°C. The composition condition (a) is such that when SiO<SB>2</SB>, Al<SB>2</SB>O<SB>3</SB>, and K<SB>2</SB>O in the raw material are converted into Na<SB>2</SB>O in equivalent mol and when the total amount of SiO<SB>2</SB>, Al<SB>2</SB>O<SB>3</SB>, and Na<SB>2</SB>O expressed in terms of Na<SB>2</SB>O is set to be 100 wt.%, the amount of Na<SB>2</SB>O is 5-12 wt.%, the amount of Al<SB>2</SB>O<SB>3</SB>is 12-20 wt.%, and Na<SB>2</SB>O/(Na<SB>2</SB>O + Al<SB>2</SB>O<SB>3</SB>) is <38 wt.%. The composition condition (b) is constituted such that the blending amounts of iron oxide, the silicon carbide and the carbon are 3-12 wt.% expressed in terms of haematite, 0.02-5 wt.%, and 3-6 wt.%, respectively, based on the total amount of the raw material mixture. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
