Who can tell me what the ceramic fiber density is?
Refractory ceramic fiber material, a kind of light and efficient thermal insulation material, owns the following advantages compared with traditional thermal insulating material: Ceramic fiber lining has low volume density. It is over 75％lighter than the light weight insulating brick, and 90%-95% lighter than the light weight castable lining. If fiber lining is used, the steel structure load of furnaces can be greatly reduced and its service life will be prolonged. Ceramic fiber lining has low thermal capacity which is only about l/10 of that of the light weight and heat resistant lining and light weight castable lining. The thermal capacity of the lining material is proportional to its mass. Low thermal capacity means that furnaces absorb less heat in the reciprocating operation, meanwhile accelerate its temperature rise, greatly reducing energy consumption during the operation and control of the furnace temperature, and particularly making the starting-up and blowing-out of heating furnaces obtain remarkable energy conservation effect. Ceramic fiber lining has low thermal conductivity. When the average temperature is 400℃, its thermal conductivity coefficient is less than 0.1w/mk; when the average temperature is 600℃, its thermal conductivity coefficient is less than 0.15w/mk; when it is 1000℃, the thermal conductivity coefficient is less than 0.25w/mk, which is around l/8 of that of the light clay brick and l/10 of that of the lightweight and heat resistant lining, achieving excellent thermal insulation effect. Ceramic fiber lining has easy construction. Expansion joints are not needed during the construction process, construction personnel can take up work right after basic training, and the construction technical factors have little impact on the lining’s thermal insulation performance.
Density of ceramic fiber products: 1. The density of aluminum silicate wool board by means of wet process production is 192kg/m3 ; 2. The density of aluminum silicate cotton blanket by means of dry process production is 128kg/m3 ;
The density of ceramic fiber module is generally within the range of 200-220. The earliest produced ceramic fiber module is made from ceramic fiber injection blanket, for the fiber of injection blanket is fine and short, making the expansiveness of the module made out of it relatively stable. While in recent years, considering the cost of production, most ceramic fiber modules are made from thread throwing blanket for it has large tensile force. Select the density and thickness of the ceramic fiber module according to the furnace body temperature, the thermal state of modules and the thermal atmosphere inside the furnace. If it’s just used as insulating layer, the density of 200kg/m3 is suggested.
