Steel fiber reinforced refractory castable is a special building material, which is mainly composed of refractory aggregate, refractory cement, fly ash, admixtures and other refractory materials and steel fiber. Steel fiber, as a reinforcing material, can effectively improve the tensile, compressive, impact and crack resistance of the material by dispersing in the refractory castable, while improving the fire resistance of the material. This material is widely used in high-temperature industrial equipment, furnaces, smelting, chemical industry and other industries to meet the fire resistance and structural safety requirements of equipment in high temperature environments.
Characteristics of steel fiber reinforced refractory castables:
High fire resistance: Steel fiber reinforced refractory castables use special refractory cement, refractory aggregate and other raw materials, have high refractoriness and can maintain stable performance in high temperature environments.
High strength and high toughness: The addition of steel fiber makes the refractory castable have higher compressive and tensile strength, as well as better toughness and impact resistance, which improves the bearing capacity and service life of the equipment.
Good crack resistance: Steel fibers are evenly distributed in the castable to form a three-dimensional network structure, which effectively improves the material's crack resistance and reduces the occurrence of cracks caused by temperature changes and stress changes.
Low coefficient of thermal expansion: Steel fiber reinforced refractory castables have a low coefficient of thermal expansion, which helps to reduce thermal stress at high temperatures and improve the stability of the material in high temperature environments.
Convenient construction: Steel fiber reinforced refractory castables have good fluidity and plasticity, which is convenient for construction. At the same time, due to the addition of steel fibers, the use of steel bars in traditional refractory castables is reduced, simplifying the construction process.
Steel fiber refractory castables are mostly used to construct industrial kiln linings that are only in contact with high-temperature gases or solid materials, such as electric furnace roofs, ladle covers, heating furnace roofs, soaking furnace covers and walls, heat treatment furnace linings, high-temperature cyclone separator linings, cement rotary kiln cooling cylinder linings, and vertical roasting furnace linings. They can also be used for containers, chutes and components that are discontinuously in contact with high-temperature melts, such as electric furnace tapping troughs, integral spray guns for jet metallurgy, argon blowing guns, and hot metal desulfurization agitators. Because of the large temperature fluctuations, thermal and mechanical stresses in discontinuous (intermittent) use, steel fibers can improve their thermal shock resistance and mechanical vibration resistance.
Steel fiber reinforced refractory castables have broad application prospects in high-temperature industrial fields, and their excellent performance can meet the requirements of modern industrial equipment for high strength and high fire resistance.