The service temperature range of plug brick mainly depends on its material and production technology. The following are the service temperature ranges and related characteristics of different types of plug bricks:

I. Clay plug brick

Fire resistance: The fire resistance of clay plug bricks is usually between 1690℃ and 1730℃.

Load softening temperature: its load softening temperature (0.2MPa) is generally not lower than 1370℃.

Usage scene: suitable for low temperature parts, such as steel drums and pouring systems.

II. High-alumina plug bricks

Fire resistance: The fire resistance of high-alumina plug bricks is higher, usually higher than 1750℃.

Load softening temperature: its load softening temperature (0.2MPa) is generally above 1530℃.

Usage: High-alumina plug brick is often used in high-temperature environment, such as blast furnace, hot blast stove, electric furnace top and so on, because of its high refractoriness and good corrosion resistance.

III. Silicon carbide plug bricks

Fire resistance: The fire resistance temperature of silicon carbide refractory bricks can be as high as 1900℃.

Load softening temperature: its load softening temperature (0.2MPa) can reach above 1650℃.

Application scenario: Silicon carbide plug brick is suitable for high temperature, severe wear and chemical corrosion environment, such as steel ladle lining, nozzle, plug head and so on.

IV. Zirconium plug brick

Refractory: zircon refractories have high refractoriness and are suitable for use in high temperature environment.

Usage: Zirconite plug brick has high resistance to acid slag and glass, and is often used in glass kiln, steel ladle lining and so on.

V. Graphite plug brick

Refractory: Graphite refractories have high refractoriness and are suitable for high temperature environment.

Usage scene: graphite plug bricks are often used in steelmaking and smelting non-ferrous metals.

VI. Summary

The service temperature range of plug brick mainly depends on its material and production technology. Generally speaking:

Clay plug brick is suitable for low temperature environment, and its fire resistance is between 1690℃ and 1730℃.

High alumina plug brick is suitable for high temperature environment, and its fire resistance is greater than 1750℃.

Silicon carbide plug brick and zircon plug brick are suitable for higher temperature and more harsh environment, and their fire resistance can reach 1900℃ and higher level respectively.

In practical application, the suitable plug brick material should be selected according to the specific process requirements and working environment to ensure its stability and reliability in use.