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硅酸铝耐火纤维应用在电加热设备上,节能效果显著,但有些地方还用不上.譬如燃油热处理炉以及一些具有高温气流冲刷的工业炉窑,如果在炉膛内壁粘贴硅酸铝耐火纤维毡,则由于高温气流的冲刷,容易粉化和脱落,而采用高温发泡涂料涂复内壁,则可克服上述缺点。高温发泡涂料是一种散状轻质耐火材料。施工时,需加入磷酸、氢氧化铝粉、硅溶胶调拌均匀,然后涂抹到炉膛内壁上。涂层厚度约10mm,经自然发泡和低、中温烘烤后,厚度会增加到15～20mm,与炉膛内壁的耐火砖接合牢固,形成了一层良好的隔热保温层。这种材料的耐热温度在1700℃以上,工作温度为1400℃左右,导热系数低(λ=0.20+1.25×10~(-4)t),
Aluminosilicate refractory fiber used in electric heating equipment, energy-saving effect is significant, but in some places still can not use.For example, fuel heat treatment furnace and some high-temperature airflow erosion of industrial furnaces, if the furnace wall paste aluminum silicate refractory fiber mat , Due to high temperature airflow erosion, easy to powder and fall off, and the use of high temperature foam coating coating the inner wall, you can overcome the above shortcomings. High-temperature foam coating is a lightweight light refractory material. Construction, the need to add phosphoric acid, aluminum hydroxide powder, silica sol mixing, and then applied to the furnace wall. Coating thickness of about 10mm, the natural foam and low, medium temperature baking, the thickness will be increased to 15 ~ 20mm, and the furnace wall refractory brick firmly bonded to form a good layer of thermal insulation. The heat-resistant temperature of this material is above 1700 ℃, the working temperature is about 1400 ℃, the thermal conductivity is low (λ = 0.20 + 1.25 × 10 -4 t)