| 摘要 |
PURPOSE:To increase length and aspect ratio of a xonotlite fiber, by reacting calcium and silica used as raw materials in a continuous hydrothermal reactor under a stable condition to form xonotlite in one step. CONSTITUTION:A raw material releasing Ca in an aqueous solution and a raw material releasing silica in an aqueous solution or a raw material releasing both Ca and silica in an aqueous solution is used as the starting material. For example, former two raw materials are preliminarily mixed, charged in a tank 1, converted to an aqueous solution or slurry in the tank and transferred to an autoclave 4 with a high-pressure pump. The autoclave 3 is heated with a heater 4 attached to the outer circumference of the tank while passing a raw material mixture liquid through the autoclave. The rate of temperature rise of the raw material liquid can be arbitrarily varied by varying the flow rate of the raw material liquid or the performance of the heater 4. The raw materials are made to react with each other in the flow to form xonotlite from the raw material in one step. The liquid containing the reaction product is temporarily stored in a tank 5 and filtered (6).
|
