| 摘要 |
FIELD: building materials industry. ^ SUBSTANCE: invention refers to building materials industry, and more precisely to ways of production of a porous ceramic heat insulating material. The technical result of the invention is reduction of fuel and energy resources and the prime cost of the goods. The way of production of a lightweight ceramic heat insulating and heat insulating and constructional material includes mixing of a silica-containing component and an alkaline component, homogenizing of the raw mixture, preliminary burning of the grained raw mixture, grinding of the burned grains and burning of the pulverized powder in metal moulds; in order to eliminate strong inclusions the silica-containing component is processed on the stone-separating rolls in advance. Diatomite or tripoli and/or gaize are used as a silica-containing component. They contain active silica. And the mixture of caustic soda and calcined soda with the ratio 0,5-0,8/1 is used as an alkaline component. Mixing of the silica-containing component and the alkaline component is performed with the weight percentage content of caustic soda 6-12 % and of calcined soda 8-15 % in the dry raw mixture. Homogenizing of the raw mixture is performed by processing in the screw press with the filtering mesh with the size of 5-25 mm. Preliminary burning of the grained raw mixture is performed at the temperature of 500-600C in the rotary furnace, and burning of the pulverized powder in metal forms is performed in the furnace by heating it up to the temperature of 680-800C with the speed of 60-80C/hour, with further isothermal exposure at the maximum temperature within 1-3 hours, cooling from the maximum temperature to 600C with the speed of 30-50C/hour and from 600 to 50C with the speed of 50-60C/hour. ^ EFFECT: reduction of fuel and energy resources and the prime cost of the goods. ^ 3 cl, 4 ex, 3 tbl, 1 dwg |
