Refractory Bricks
- Features:
High temperature stability: Refractory bricks can maintain their shape and performance at extremely high temperatures and will not melt or deform easily.
Mechanical strength: With high compressive strength and flexural strength, they are suitable for parts that need to bear weight or structural support.
Chemical corrosion resistance: They have a certain tolerance to chemical substances such as acids and alkalis, and are suitable for occasions with harsh chemical environments.
Low thermal conductivity: Although lower than other building materials, it is higher than the thermal conductivity of insulation bricks.
- Application:
Used in structural parts of furnaces, such as furnace walls, furnace bottoms, and furnace roofs.
Applicable to environments that require load-bearing and high temperature resistance, such as heating furnaces in the steel industry, glass melting furnaces, cement kilns, etc.
Insulation bricks (insulating bricks)
- Features:
Extremely low thermal conductivity: The main purpose is to reduce heat conduction and provide excellent insulation effect.
Lightweight: Usually low density, light weight, and reduced structural load.
High porosity: Contains a large number of pores inside, which enhances thermal insulation performance.
Lower mechanical strength: Due to its lightweight structure, the mechanical strength is usually low and not suitable for load-bearing.
- Application:
Mainly used for the lining or outer wall of furnaces to reduce heat loss and improve energy efficiency.
Suitable for occasions that require rapid heating and cooling, such as ceramic kilns, heat treatment furnaces, etc.
Also used for structures that require lightweight, such as high-temperature pipes, containers, etc.
Main Differences
| Refractory Bricks | Insulation bricks | |
| Function: | Provides structural support and high temperature resistance. | Provide thermal insulation and reduce heat loss. |
| Density and weight: | Higher density and heavier weight. | Low density and light weight. |
| Thermal Conductivity: | The thermal conductivity is relatively low, but not as low as that of insulation bricks. | It has extremely low thermal conductivity and is specially designed to retain heat. |
| Application location: | Load-bearing parts. | Insulation area. |
| Thermal shock resistance: | Has good thermal shock resistance. | Thermal shock resistance may not be as good as refractory bricks because the structure is more fragile. |
| price: | More expensive than insulation bricks because their materials and manufacturing processes are more demanding. | The price is lower because its main component is lightweight material. |
In actual applications, many furnaces use both refractory bricks and insulation bricks to maximize structural stability and thermal efficiency. Refractory bricks provide structural support, while insulation bricks provide insulation inside or outside, together forming an efficient and durable high-temperature working environment.
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