Ceramic fiber is a kind of the use of high temperature refractory materials (such as coke gem) after the arc melting, with compressed air injection of fibrous material, also known as ceramic fiber cotton. The use of ceramic fiber can be made of various ceramic products. Domestic ceramic fiber from the AI2O3 content of 62% and 45%, the former use of the temperature of 1150-2000 ℃, the latter is l000 ℃.
Pottery mats are divided into ceramic mats (adhesives for aluminum phosphate), ceramic mats (adhesives for latex, polymeric aluminum, water glass, methyl cellulose, latex Aluminum phosphate composite adhesive) and ceramic fiber wet mat (adhesive for the silica sol) three. According to the performance of ceramic fiber mat and the temperature of the furnace, the hot surface of the furnace wall can be made of hard felt.
The size of ceramic products is 600 × 400 × 20 (10) mm
The basic properties of ceramic fiber felt are as follows:
(1) the use of high temperature can go to l000 ℃.
(2) the density of ceramic fiber carpets in the 200Kg / m3 below (usually 160kg / m3), only light heat-resistant lining l / 6-1 / 7.
(3) heat capacity is only lightweight heat-resistant lining and lightweight clay refractory brick 1/9.
(4) ceramic fiber at high temperature stability and residual shrinkage rate is very small, without leaving shrinkage or expansion joints construction convenience.
(5) thermal conductivity is small. (The average temperature is 361 ° C) when the hot spot temperature is 600 ° C (average temperature 366 ° C) is 0.078W / (m · k); 900 ° C (average temperature is 551 ° C) is O.096W / (mk) 678 ℃) when the 0.125W / (mk), about light clay refractory bricks of 1/8, for the lightweight heat-resistant look 1/10.
(6) sound insulation effect is good. Ceramic fiber coating can reduce the frequency of less than 1000Hz high-frequency noise, but also to absorb some low-frequency noise.
(7) has a certain tensile strength.
(8) good chemical stability.
(9) Better elasticity (room temperature elasticity 78%) Easy to transport and install.
(10) has a good anti-air erosion performance, can withstand 30-50m / s air erosion.