Blast furnace refractories
In the blast furnace, iron ore is melted and reduced using coke and limestone. The materials are charged from the furnace top to form layers. Hot blast blown from the furnace bottom burns the coke and reduces the iron ore to produce molten iron at the bottom. Limestone combines with impurities in the ore to produce slag on top of the molten iron at the bottom.
Importance of refractories with characteristics applicable for each part
The blast furnace generally consists of several major portions like the shaft, belly, bosh, tuyere, taphole and bottom. With our extensive knowledge and experience accumulated through contact with many clients over many years, Krosaki Harima Corporation provides engineering and products, carefully selecting the refractory materials which are appropriate for each respective part.
Required characteristics for blast furnace bricks
- ＊Impact resistance and abrasion
resistance against material charging, - ＊CO gas resistance,
- ＊Alkaline resistance,
- ＊Thermal spalling resistance,
- ＊Corrosion resistance against
molten iron and slag, - ＊Resistance against molten
iron penetration, and others.
Development of blast furnace consumables
In addition to bricks for the blast furnace body proper, the corporation is also developing and supplying consumables like taphole clay (for plugging tapholes) and trough materials (for lining iron troughs), which show remarkable performance in many steelworks.
