| 摘要 |
<P>PROBLEM TO BE SOLVED: To realize high corrosion resistance in alumina-based monolithic refractories by overcoming the problems of occurrence of cracks and development of the cracks which are considered to be caused by a ZrO<SB>2</SB>material and arise in the refractories of a furnace body or the like that is formed by using a raw material composition for the alumina-based monolithic refractories. <P>SOLUTION: The raw material composition for alumina-based monolithic refractories is obtained by mixing aggregate particles of 20-80%, a particle group composed of intermediate particles having a content of 18-80% and of fine particles, and a mineralizer of 1-5%, wherein the aggregate particles have a particle size in the range of 1-10 mm and a chemical composition substantially composed of Al<SB>2</SB>O<SB>3</SB>, and the particle group has a particle size in the range of 1 mm or smaller, is obtained by mixing at least a particle having a chemical composition of Cr<SB>2</SB>O<SB>3</SB>and a particle substantially having a chemical composition of ZrO<SB>2</SB>-SiO<SB>2</SB>, includes ZrO<SB>2</SB>-SiO<SB>2</SB>particle at a rate of 10% or more, and further has a ratio of ZrO<SB>2</SB>-SiO<SB>2</SB>/Cr<SB>2</SB>O<SB>3</SB>of 0.11-1.5. <P>COPYRIGHT: (C)2008,JPO&INPIT |
