From top to bottom, the blast furnace is divided into throat, body, waist, belly,Refractory Bricks hearth and bottom, etc. What refractory bricks are used in each part of the blast furnace? The throat is the part that is directly impacted and rubbed when the charge falls ,Refractory Bricks Generally use high-density and high-alumina bricks. The temperature of the upper and middle parts of the furnace is only 400~800℃,Refractory Bricks and high alumina bricks and sillimanite are used to attack the bricks in this part.
Because the lower part of the furnace body is at a high temperature and is subject to dust erosion and alkali metal vapor erosion,Refractory Bricks it is required to use high-quality clay bricks, high alumina bricks, silicon carbide bricks or high-quality clay bricks with high slag resistance,Refractory Bricks alkali resistance, high temperature resistance and high wear resistance. Corundum bricks. The temperature of the furnace side reaches 1400~1600℃, and the slag erosion and steam erosion are serious,Refractory Bricks and the erosion and corrosion are strong. Therefore,Refractory Bricks silicon carbide bricks and reaction bonded silicon carbide bricks are used.
The furnace belly temperature reaches 1600~1650℃,Refractory Bricks and high alumina bricks, corundum bricks or silicon carbide bricks can be used. The temperature of the upper part of the hearth near the wind mouth area is 1700~2000℃,Refractory Bricks and sillimanite bricks, corundum castables, graphite fillers,Refractory Bricks and silicon carbide refractory bricks are mostly used. The furnace bottom temperature is 1450~1500℃. Graphite bricks and microporous carbon bricks are mostly used. Now corundum bricks,Refractory Bricks corundum mullite bricks and synthetic mullite bricks are also used.
