1.Furnace throat: It can withstand the impact and damage of the recycled waste.
2. The upper end of the furnace: This area has a relatively severe erosion effect on alkaline earth metals and zinc vapor, as well as erosion and damage caused by reduced discharge and elevated cyclones. High density clay bricks and advanced alumina bricks with excellent chemical resistance and wear resistance should be selected. Or ammonium sulfate pre impregnated clay bricks, i.e. polyphosphate pre impregnated clay bricks.
3. The lower end of the furnace wall and the furnace waist: Organic chemical erosion and brick lining such as coal ash should be made of fire-resistant insulation materials with high temperature impact resistance, erosion and erosion, as well as large-scale explosions, to produce carbon carbon composite material bricks with excellent furnace performance indicators in various countries around the world. Henan Asia Refractory Materials Co., Ltd. stated that in order to achieve a good service life of over eight years. However, aluminum carbon bricks can also be used for blast furnaces below 100m3. Aluminum oxide carbon bricks are cost-effective, which will relatively control costs.
4. Furnace bosh: Clean the furnace bosh with high-temperature vapor and coal ash iron. High heat flux. Henan Asia Refractory Materials Co., Ltd. stated that this application has high flame retardancy, long-term load softening temperature, and large bulk density of high alumina bricks, aluminum carbon bricks.
5. Furnace air outlets: These are areas where oxidation reduction reactions occur, with temperatures ranging from 1900 to 2400 ℃. Brick linings are susceptible to internal stress caused by high temperatures, as well as high-temperature vapor erosion, coal ash iron erosion, and alkaline earth metal erosion. Contemporary blast furnaces use mixed bricks to build furnace air outlets, which are made of high alumina refractory bricks, corundum zirconium corundum bricks, brown corundum and silicon nitride fused carbon carbon carbon carbon composite material bricks, and are pressed with carbon blocks.
6. The lower part and bottom of the furnace: It is the area where all blast furnace materials are severely corroded. The level of erosion determines the service life of the blast furnace. Large and medium-sized blast furnaces will use ceramic cups, overlapping bricks, etc., as well as high-quality brown corundum bricks, gray corundum bricks, carbon microporous plate bricks, and pressed bricks. However, carbon bricks will penetrate and dissolve molten steel. The organic chemical corrosion of carbon metal materials on alkali bricks and their internal stress on carbon bricks are still key factors for the service life of the Weixie furnace bottom and furnace.
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