Fire Blanket Materials

Fire blankets are made of fibrous heat-insulating refractory materials, refractory fibers. Refractory fibers have the characteristics of general fibers, such as softness, elasticity, and certain tensile strength. They can be further processed into various products such as paper, wire, rope, belt, blanket and felt; they also have high temperature resistance and corrosion resistance that general fibers do not have. As a refractory insulation material, it has been widely used in metallurgy, chemical industry, machinery, building materials, shipbuilding, aviation, aerospace and other industrial sectors.
Material classification
Refractory fibers are divided into two categories: amorphous (glassy) and polycrystalline (crystalline). Amorphous refractory fibers include aluminum silicate, high-purity aluminum silicate, chromium-containing aluminum silicate and high-aluminum refractory fibers. Polycrystalline refractory fibers include mullite fibers, alumina fibers and zirconium oxide fibers. (Table 1) There are also classifications based on the maximum allowable use temperature of refractory fibers.
Material classification characteristics
Refractory fibers are also good infrared radiation materials with good thermal capacity and infrared heating effect. The use of refractory fiber products can effectively save energy and is an ideal energy-saving and efficiency-enhancing material. Production practice has proved that the application of refractory fiber in continuous heating industrial furnaces can save more than 15% of energy, and the use of refractory fiber in intermittent industrial heating furnaces can save more than 30% of energy. At the same time, it can improve productivity and product quality, realize the lightweight and large-scale structure of the furnace body, and have good comprehensive performance. Refractory fiber is soft and elastic, and is also an ideal sealing material. Due to its insulation, silencing, anti-oxidation, oil and water resistance, and convenient construction, it is widely used in metallurgy, building materials, petroleum, chemical industry, shipbuilding, electricity, aerospace and other fields.
Polycrystalline refractory fiber is a new type of high-temperature insulation material developed after amorphous refractory fiber in the early 1970s. It is mainly used in high-temperature kilns with working temperatures above 1400℃, which can save energy by 25% to 40%. Polycrystalline refractory fiber can also be used as a composite reinforcement material and catalyst carrier, with good application effect. Polycrystalline refractory fiber can also be used in aerospace missiles and atomic energy fields. The polycrystalline refractory fibers that have been industrially produced and applied internationally mainly include polycrystalline alumina fibers (Al2O3 80% ~ 90%, SiO2 21% ~ 20%), polycrystalline mullite fibers (Al2O3 72% ~ 79%, SiO2 21% ~ 28%) and polycrystalline zirconia fibers (ZrO2 92%, Y2O3 8%).