The common methods for repairing refractory materials for blast furnaces mainly include the following two:
1. Repair with refractory spray paint
Method:
Spraying process: Use refractory spray paint to locally repair the lining of the blast furnace. This method is usually carried out when the blast furnace is in operation or during shutdown and maintenance. The spray paint is usually composed of refractory particles, binders and other additives, and can be evenly covered on the area to be repaired through spraying equipment.
Features:
Quick construction: The spraying method has a fast construction speed, which can reduce the shutdown time of the blast furnace and improve production efficiency.
Strong adaptability: The spraying material can effectively fill the local defects of the blast furnace lining and is suitable for repairing parts with complex or irregular shapes.
High adhesion: The refractory spray paint has a strong bonding force with the substrate and can effectively prevent falling off and peeling.
2. Repair with refractory brick masonry
Method:
Brickwork repair: For severe wear or damage to the blast furnace, refractory bricks are used for local or full repair. During the repair process, the damaged refractory bricks need to be removed, cleaned, and then new refractory bricks are used for masonry. The uniformity of the brick joints and the stability of the overall structure need to be considered during masonry.
Features:
High structural strength: The repair of refractory bricks can provide good structural strength and is suitable for high-load and high-temperature working environments.
Durability: The use of high-quality refractory bricks can effectively improve the overall durability and service life of the lining.
Suitable for large-area repairs: When the lining of the blast furnace is damaged over a large area, brickwork repairs can more effectively restore the normal operating performance of the blast furnace.
Summary
The two common methods of refractory materials for blast furnace repair are refractory spray material repair and refractory brick masonry repair. The selection of the appropriate method requires comprehensive consideration based on the specific degree of damage to the blast furnace, the repair location, and the production conditions. Spray repair is suitable for local quick repairs, while brickwork repair is more suitable for large-area, structural damage.
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