The choosing of furnace top material. In an industrial furnace, the temperature in the furnace top is about 5% higher than the furnace wall. That is to say, when the measured temperature of the furnace wall is 1000°C, the furnace top is higher than 1050°C. Therefore, when selecting materials for furnace top, the safety factor should be considered more. For tube furnaces with temperature higher than 1150°C, the working surface of the furnace top should be 50-80mm thick zirconium ceramic fiber wool layer, followed by high-alumina ceramic fiber wool with a thickness of 80-100mm, and the remaining available thickness of 80-100mm ordinary aluminum ceramic fiber. This composite lining adapts to the gradient drop in the temperature transfer process, reduces the cost and improves the service life of the furnace lining.
In order to achieve long service life and good energy-saving effect for the insulation and sealing of tubular heating furnace top, the unique thermal conditions of the furnace should be strictly abide by. At the same time, the different forms of ceramic fiber wool products and technologies and treatment methods of ceramic fiber wool used in different parts of furnace should also be considered.
Post time: Dec-06-2021
