| 摘要 |
PURPOSE:To provide a method for producing a calcium silicate material having a smaller bulk density than those of conventional materials, capable of giving the calcium silicate material good in heat insulation, shortened in dehydration time on its production. improved in production efficiency in comparison with conventional materials, and enabling the production of the thick materials. CONSTITUTION:The method for producing the calcium silicate material by adding water to diatomaceous earth and calcined lime or hydrated lime as main raw materials, boiling the produced slurry for the preliminary reactions of the raw materials, dehydrating the slurry, molding the dehydrated product, and subsequently curing the molded product with steam at a high temperature under a high pressure comprises using diatomaceous earth heat-treated in a temperature range of 400 deg.C to a temperature just before the beginning of the contraction of the diatomaceous earth as the diatomaceous earth of raw material. |
