| 摘要 |
<p>PURPOSE:To improve refractoriness by subjecting a mixture consisting of special cement with refractoriness, active silica, aggregate with heat resistance or thermal hysteresis, and auxiliary materials to hydraulic forming. CONSTITUTION:A mixture as a raw material consisting of 100 pts. of pulverized powder of crystalline and refractory special cement containing 40-65% (by weight, the same applies to the following) CaO, 10-32% SiO2, 7-24% Al2O3, 1.5-12% F, 0.1-5% B2O3, and <=15% other components, 5-40 pts. of pulverized powder of active silica, 20-500 pts. aggregate having heat resistance or thermal hysteresis, such as chamotte, and 2-20 pts. of one or more auxiliary materials selected from plasticizer, organic or inorganic short fiber, water reducing agent, retarder, coloring material, etc., is kneaded at 5-40% water/cement and formed, by which an inorganic formed body in which shrinkage factor at the time of heating is regulated to <=1.0% is prepared. This formed body is glazed and then subjected to drying and sintering at 120-1100 deg.C, by which a refractory formed body can be obtained.</p> |
