The quality of the furnace lining directly affects the length of the furnace age. The furnace lining should have a certain strength and good thermal insulation performance, not only to withstand the mechanical erosion of the charge, high temperature furnace gas, molten iron and physical and chemical erosion of the slag, but also to ensure good thermal shock Stability, if the material is improperly selected or the quality of the masonry is not up to standard, the furnace lining will accelerate melting, erosion and even cracking, which will lead to leakage of iron through the furnace and directly affect the normal progress of the smelting process.
Therefore, in the construction of furnace lining, the reasonable selection of refractory materials should be carried out according to the temperature difference and adverse factors of each part to achieve the purpose of improving the comprehensive performance and service life of the furnace lining, which is the basic principle of furnace lining masonry. The main materials used are: asbestos board, high-alumina aggregate, high-alumina fine powder, high-alumina brick, carbon brick, clay brick, rough seam paste, refractory clay, castable, carbon cement, etc. Masonry material standards: high refractoriness, certain strength (especially high temperature strength), small volume expansion coefficient, high thermal shock resistance; good resistance to physical and chemical erosion; good thermal insulation and heat storage performance; processing High precision, the shape conforms to the national standard; all materials should be kept clean, and must not be mixed with soil, dust and other sundries to prevent moisture and damage.
