Features of facing bricks for hot blast furnace

Facing brick – this is fire brick, which can be used in regenerators of blast furnaces and thermal blowing furnaces. It is widely used in steel industry. Facing brick has a high heat transfer capacity, good ventilation, low resistance and large heat storage area.

Introduction of checker brick

Refractory blocks are mainly used in hot blast furnace regenerators. Gas can pass through the top and bottom holes of the fireproof blocks. Different refractory bricks will be selected for hot blast furnaces according to the temperature requirements of different regions and other indicators, such as clay bricks and high alumina bricks, mullite bricks and sillimanite bricks.

How control bricks work?

The function of a hot blast furnace is to convert cold air, fed to the blast furnace, into hot air, and the hot air is sent to the blast furnace through the hot air pipe for combustion reaction. A hot blast furnace has a firing period in the furnace and an air supply period, and these two work cycles alternate. During the firing period, the high-temperature flue gas after combustion passes through the holes in the facing bricks of the hot blast furnace and transfers heat to the refractory blocks. During air supply, cold air from the blower enters the hot blast furnace, heated by checker bricks, turning into hot air, and is sent to the blast furnace through a hot air pipe.

Comparison of heat storage area of ​​checker bricks of different sizes

1. Traditional lattice brick with 7 holes: grate diameter 43 mm, heat storage area 38,1 m2/m3
2. High performance lattice brick with 7 holes: grate diameter 30 mm. The heat accumulation area is 47,08 m2/m3
3. 19-hole high performance control brick, grate diameter 30 mm, heat storage area 48,6 m2/m3
4. 31-hole high performance control brick, grate diameter 25 mm, heat storage area 58,1 m2/m3
5. High performance control brick with 37 holes, grate diameter 20 mm, heat storage area 68,7 m2/m3