Iron ditch refractory castables are most afraid of oxidation decarburization and structural spalling. Iron ditch castables are aluminum silicon carbide carbon castables, which are one of the refractory castable products and are used for the inner lining of the channel ditch through which molten iron and slag flow in blast furnaces.
1,Improvement of the intrinsic quality of iron ditch castables
Due to the harsh conditions of iron ditch materials, they require high strength and good bending resistance, as well as resistance to structural spalling and erosion. However, the high strength and bending resistance of this castable are proportional, while the resistance to structural spalling requires low strength. Therefore, the process ratio of iron ditch materials has a contradiction that cannot be ignored.
To solve this contradiction, first of all, under the condition of not producing spalling, the resistance to demolition and strength of the intrinsic quality of iron ditch castables should be improved as much as possible to ensure resistance to erosion and erosion under temperature fluctuations.
2,Raw materials and use effects of iron ditch refractory castables
The raw materials of iron ditch castables use composite raw materials for process adjustment and ultrafine powder to improve the matrix's resistance to slag invasion. However, on-site construction is also a very important link, especially when repairing and overlaying new and old materials. If the construction is improper, it is easy to cause iron seepage interlayer, which will reduce the service life of the iron ditch material. Therefore, when overlaying new and old materials, the slag iron at the old material must be cleaned up, and the vibrating iron ditch castable must be reasonably connected with the old material during construction.
The use effect of the iron ditch material is good only when there are no mistakes in many links. The long molten iron cycle is not only based on the quality of the castable itself, or on-site construction. If any link is improper, the service life will be reduced, or other unexpected situations will occur.
The iron ditch refractory castable should be based on the use of the application site, and different situations should be handled differently. Only by cooperating from many aspects and angles can the use effect be good.
