Can corundum mullite castable be used for hot air outlet repair?
Corundum mullite castable can be used to repair hot air outlets.
1. Corundum-mullite castable has strong air tightness
Although corundum mullite castables are not sintered at high temperatures like refractory bricks, their air tightness is better than that of refractory brick masonry. This is because the hot air outlet of the running hot blast furnace collapsed and needs emergency repair. If the original composite bricks are used, a certain amount of production will be required. cycle, because composite bricks need to be produced and pre-layed, with many varieties and small usage. The production cycle is long and conditions for immediate repair cannot be achieved. If the collapsed parts are properly dismantled and the hot air branch pipes are first built with lightweight bricks and then corundum-mullite castable molds are used for integral casting, it is completely possible. . Moreover, corundum mullite castables are used to connect the hot air branch pipes and hot air outlets together, making the airtightness stronger.
2. Corundum-mullite castables can be used in emergency repair burner outlets.
Corundum-mullite castables can also be used in emergency repair burners. The hot-air furnace burner is an extremely easily damaged part. In the event of an emergency, the hot-air furnace burner can also be made of corundum-mullite castables as an integral castable. The maintenance and steps are the same as for the hot air outlet. First, remove the collapsed part, then use light masonry to build the insulation layer, and then use a two-stage support formwork at the combined bricks to perform overall pouring to achieve an inclination of 25° to ensure that the original Design requirements.
3. Can also be used in other places
Corundum mullite castables can also be used in the emergency repair of large wall straight sections of hot blast furnaces, hot blast vault composite bricks, hot blast branch pipes and the joints of furnace shells. The area of partially deformed and burned heavy bricks is not large, but it affects normal operation. For production use, if you are eager to maintain production, you can use corundum mullite castables for repair. In the same method, first remove the damaged parts, and then use mullite lightweight bricks to repair the original insulation layer. Then apply asphalt paint on the surface of the lightweight bricks, and use corundum-mullite castables as a whole lining method to repair the damaged upper part of the hot blast stove.
4. Must be baked according to a reasonable oven curve
Whether it is the hot air outlet, combustion port, or repaired hot air branch pipe, it must be baked according to a reasonable oven curve before it can be transferred to normal operation. Only the baked corundum mullite castable can ensure its use effect.
