Main Characteristics Of Refractory Fiber

Dec 26, 2023

Refractory fiber, also known as ceramic fiber, is an artificial inorganic non-metallic fiber material. It is a glass phase or crystalline binary compound composed of aluminum oxide and silica as the main components. Using refractory fibers as hot surface materials or insulation materials for industrial furnaces can generally save 20%-35% of energy. The main characteristics of refractory fibers are high temperature resistance, DYSen low thermal conductivity, good chemical stability, and good thermal shock stability and vibration resistance. 


1. High temperature resistance. The service temperature of aluminum silicate refractory fiber is 1000-1300℃, and the zirconia refractory fiber can reach 1600℃, and some are even higher. However, the maximum service temperature of general fiber materials, such as asbestos, rock wool, slag wool, etc., is generally between Below 650℃.


2. High thermal insulation performance. The thermal conductivity of refractory fiber at high temperatures is very low. At 1000°C, it is only 1/20-1/10 of refractory clay bricks and 1/3 of lightweight refractory bricks. It also has small heat capacity, so the thermal insulation efficiency is high. Due to its low volume density, using it as a thermal insulation layer can reduce the thickness by about half.


3. Good earthquake resistance. Refractory fiber is soft and elastic, so it is resistant to thermal shock and rapid heat. It will not break or crack no matter how fast it heats up or cools down. Resistant to mechanical vibration, but cannot withstand direct impact friction.


4. Strong resistance to chemical erosion. Refractory fiber is more resistant to chemical erosion than rock wool and glass wool. Except for strong alkali and hydrofluoric acid, it is almost not corroded by various chemicals, steam, and oil. It does not react with acid at room temperature and does not react with liquid aluminum, copper, lead, tin, etc. at high temperatures, so it can be used as a heat insulation material for a variety of metal melting furnaces.


5. Other characteristics. The refractory fiber has good compression rebound and air permeability resistance, and the sealing ratio is very good. Based on this performance, it can be used as a sealing material for frequently opened parts such as masonry expansion joints, furnace doors, and side seals and rear seals of trolley furnaces. Refractory fiber is soft in texture and has good processability. Furnace linings made of refractory fiber are thin, light and easy to construct.


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