Sleeve bricks are widely used in iron and steel industry, mainly in key parts such as continuous casting system, ladle lining and tapping hole. The following is its specific application:

I. Continuous casting system

In the process of continuous casting, sleeve brick is an important refractory for controlling molten steel flow and protecting equipment;

Matching of nozzle brick and sleeve brick: sleeve brick is usually used in combination with nozzle brick and installed at the tapping hole of ladle or tundish. Its main function is to protect the metal mandrel, prevent the erosion of high-temperature molten steel and slag, and control the flow and direction of molten steel at the same time to ensure the stability of continuous casting process.

Plug rod system: In the plug rod system, the sleeve brick is sleeved outside the metal core rod of the plug rod to protect the core rod from direct erosion by high-temperature molten steel, while maintaining the rigidity of the plug rod to achieve accurate flow control.

II. Ladle lining

The application of sleeve brick in ladle lining is mainly reflected in the following aspects:

Ladle tapping hole: sleeve brick is used for the tapping hole of ladle, which bears the erosion and chemical erosion of high temperature molten steel. Its high refractoriness and corrosion resistance can effectively prolong the service life of ladle.

Ladle seat brick: sleeve brick is also used in the seat brick part of ladle, which plays a supporting and protecting role and prevents molten steel from leaking.

III. Converter tapping hole

In the process of converter steelmaking, sleeve brick is the key refractory material for tapping hole;

Protect the tap hole: the sleeve brick bears the chemical erosion, mechanical erosion and thermal shock of high temperature molten steel and high oxidation slag. Its high corrosion resistance and thermal shock resistance can effectively protect the tapping hole and reduce the leakage of molten steel and the phenomenon of broken bars.

Quick replacement technology: In order to improve production efficiency, some new sleeve brick structural designs can realize quick replacement and reduce downtime.

IV. Tundish and runner brick

Sleeve bricks are also used in conjunction with refractory materials such as runner brick:

Tundish lining: In tundish, sleeve bricks are used to protect the lining and prevent molten steel from corroding refractories.

Runner brick: The sleeve bricks cooperate with runner brick to ensure the smooth flow of molten steel in runner brick and reduce the erosion and erosion of refractory materials by molten steel.

V. Other applications

Blast furnace and hot blast stove: Sleeve bricks are also used for lining of blast furnace and hot blast stove to protect the furnace body from high temperature slag and hot blast.

Hot metal car and steel ladle: in hot metal car and steel ladle, sleeve bricks are used to protect the lining and prevent the corrosion of high temperature hot metal.

VI. Summary

The application of sleeve brick in iron and steel industry covers many key parts such as continuous casting system, ladle lining and converter tapping hole. Its high refractoriness, corrosion resistance and thermal shock resistance enable it to run stably in high temperature environment for a long time, effectively protect equipment, improve production efficiency and ensure the quality of molten steel.