According to the different parts of high-alumina refractory bricks, the working conditions and requirements of the lining of each part of the cupola are also different. The working environment of each part of the lining and the requirements for refractory materials,Refractory Bricks the configuration of high-alumina refractory bricks for each layer of the cupola: Chimney: The temperature is between 100~400℃,Refractory Bricks which may be higher during the furnace. The furnace lining is required to have strong thermal insulation and can work for a long time without replacement. It is generally built with ordinary clay bricks,Refractory Bricks light clay bricks or light refractory concrete.
Feeding throat: the temperature is between 250~600℃,Refractory Bricks and the furnace lining is severely impacted by the charge. The furnace lining is required to have high mechanical strength and impact resistance. Generally use refractory bricks or steel guide barrels. Preheating zone: the temperature is 500~1150℃,Refractory Bricks the furnace lining is affected by the mechanical abrasion of the furnace material,Refractory Bricks and the furnace lining is required to have high mechanical strength, wear resistance,Refractory Bricks and sufficient refractoriness. Generally, ordinary clay bricks and high alumina bricks are used to build. Melting and overheating zone: The temperature is 1150~1900℃,Refractory Bricks the furnace lining is affected by high temperature furnace gas, molten iron, and slag. The furnace lining is required to have high refractoriness,Refractory Bricks slag resistance and thermal stability. It needs to be replaced and repaired frequently. It is built with high-quality clay bricks, red silica bricks and other acid enamel materials. There are also magnesia bricks, limestone bricks,Refractory Bricks dolomite bricks and other alkaline enamel materials used for alkaline furnaces containing C and Si refractories.
Hearth area: The temperature is between 1500 and 1600°C. The furnace lining is affected by high temperature molten iron and slag. The furnace lining is required to have high refractoriness,Refractory Bricks slag resistance and thermal stability,Refractory Bricks and requires frequent historical replacement and repair. The refractory configuration is the same as the melting zone and overheating zone. Furnace bottom: The working environment is similar to that of the hearth area. Generally,Refractory Bricks waste sand is used to pave the bottom layer and coke sand is used to pave the surface. Bridge: The temperature is between 1500~1600℃, and it is eroded by high-temperature molten iron and slag. When the slag opening is operated, it is eroded by furnace gas. The furnace lining is required to have high refractoriness,Refractory Bricks slag resistance and thermal stability. The bridge lining materials,Refractory Bricks high-quality refractory bricks and formed bridge bricks need to be replaced and repaired frequently.
Forehearth: The temperature is between 1500~1550℃,Refractory Bricks and it is eroded by high-temperature molten iron and slag. The furnace lining is required to have high refractoriness,Refractory Bricks slag resistance and thermal stability, as well as certain thermal insulation performance. The surface of the layer needs to be replaced and repaired frequently. Acid enamel is used for the surface of the inner cavity of the general acid furnace,Refractory Bricks ordinary clay bricks are used in the middle,Refractory Bricks and heat insulation materials are used for the outer layer; some alkaline furnaces use alkaline enamel for the inner cavity surface of the front furnace and alkali for the middle layer. Sex brick building. Iron tapping/slag tapping tank: The temperature is between 1450-1550°C, and it is intermittently affected by the erosion and erosion of high-temperature molten iron and slag. It needs to be replaced frequently and repaired with ordinary clay bricks,Refractory Bricks and the surface layer is built with enamel.
