Refractory bricks are indispensable for the construction of high-temperature industrial kilns. Moreover, ensuring their quality and durability is crucial. In addition, the refractory brick laying process must be carried out by experienced and qualified construction personnel. This article analyzes the precautions and specifications for refractory brick laying from a professional perspective.
Before Refractory Brick Masonry
- Preparation of refractory mortar: We should choose appropriate mortar according to the material, use temperature and environment of refractory bricks. For example, high-aluminum mortar is used for masonry of high alumina bricks, and magnesia refractory mortar is used for masonry of magnesite bricks.
- Refractory mortar ratio: Ensure that the mortar ratio is scientific. In addition, the prepared mortar should also maintain proper fluidity to facilitate construction operations.
In Refractory Brick Masonry
- The order of masonry fire bricks: We should masonry them layer by layer from bottom to top. Especially when masonry the furnace body, it should be ensured that the joints of the bricks are staggered to form a criss-cross structure. This can increase the strength of refractory bricks.
- Brick joint control: Brick joints should be uniform during masonry, and the thickness of brick joints is usually 8-10 mm. Too wide or too narrow will affect the strength of the brick body.
- Compact bricks: When laying each brick, it is necessary to hit the brick surface with a hammer appropriately. We must ensure that the refractory bricks are in close contact with the refractory mortar to avoid hollowing and looseness.
After Refractory Brick Masonry
- Acceptance: After the completion of masonry, an overall quality inspection is carried out. Focus on checking whether the brick joints are uniform and whether there are cracks.
- Curing period: In order to ensure the strength and durability of refractory bricks, the refractory bricks after masonry need to be cured for a certain period of time. The total curing time is 3-7 days, and the specific time needs to be adjusted according to the actual construction environment.
Only by following these specifications can the service life of refractory bricks be extended and the working efficiency of kilns be improved. At the same time, this can also improve the efficiency of construction and avoid rework and masonry errors.