Refractory materials play a vital role in industrial furnaces. They can not only withstand high temperatures, but also resist chemical erosion and physical wear, thereby protecting the furnace structure and extending the service life of the furnace. The following are suggestions for selecting refractory materials according to different furnace temperature ranges and furnace types:
1. Medium temperature resistance furnace (about 1000°C)
Refractory clay bricks: suitable for medium temperature environments, with good refractoriness and thermal stability.
Lightweight refractory clay bricks: provide better insulation performance and reduce energy loss.
High alumina bricks: suitable for high temperature areas in the furnace, providing additional refractory protection.
Floating bead bricks: lightweight and have good thermal insulation performance, suitable for insulation layer.
Refractory fiber: used in furnace doors, furnace tops and other parts, providing efficient insulation.
2. Flame heating furnace and heat treatment furnace (about 1300°C)
Refractory clay bricks: basic refractory materials, suitable for furnace bottom and furnace walls.
High alumina bricks: used in areas subject to higher temperatures and wear.
Silica bricks: suitable for high temperature areas, with good creep resistance.
Silicon carbide bricks: suitable for heating elements near the heating element, with high thermal conductivity and wear resistance.
Refractory concrete and refractory plastics: suitable for on-site casting and repair work.
3. High temperature salt bath furnace (about 1300°C)
Refractory clay bricks: basic materials, used for insulation and support structure.
High alumina bricks and zirconium bricks: suitable for parts subject to high temperature and chemical erosion.
Refractory concrete: used for rapid construction of furnace bottom and furnace wall.
4. High temperature resistance furnace (about 1400°C)
Refractory clay bricks and lightweight refractory clay bricks: used for lower temperature areas and insulation layers.
High alumina bricks and lightweight high alumina bricks: suitable for high temperature areas and insulation structures.
Lightweight alumina bricks: have good thermal insulation properties.
Silicon carbide bricks: used for parts subject to high temperature and high thermal conductivity requirements.
Refractory fiber: used for insulation of furnace top and furnace door.
5. Molybdenum wire furnace (about 1650°C)
Alumina bricks: have excellent high temperature resistance.
Corundum bricks: suitable for areas subject to extreme high temperatures.
Silicon carbide bricks: used in high temperature areas, with high thermal conductivity and wear resistance.
Alumina hollow ball bricks: lightweight and heat-insulating, used for insulation layer.
6. Cupola (about 1650°C)
Refractory clay bricks: used for foundation lining.
Semi-silica bricks and sillimanite bricks: suitable for parts subject to high temperature and chemical erosion.
White foam bricks and dolomite bricks: used for areas subject to high temperature and chemical erosion.
Carbon bricks and graphite bricks: suitable for high temperature areas, with good thermal conductivity and erosion resistance.
Refractory plastics and refractory ramming materials: used for repairs and special-shaped linings.
7. Induction furnace (about 1700°C)
Silica sand, sillimanite sand, high-alumina sand, magnesia sand, chrome sand, zirconium sand, corundum: used to make high-temperature resistant lining materials with good thermal shock resistance and erosion resistance.
8. Electric arc furnace (about 1700°C)
Magnesium bricks: have excellent high-temperature resistance and erosion resistance.
Silica bricks, high-alumina bricks: suitable for areas subjected to high temperature and chemical erosion.
Magnesium-alumina bricks, magnesia-chrome bricks: used for areas subjected to extreme high temperature and chemical erosion.
Dolomite bricks: used in areas subjected to high temperature and chemical erosion.
Refractory concrete, refractory gunning materials, refractory ramming materials: used for quick repairs and special-shaped linings.
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