Blast furnace ironmaking is the main equipment, it has the advantages of big capacity, high productivity and low cost, which is unmatched by other ironmaking method.
With the progress of the world steel industry, the blast furnace in large-scale, efficiency, long life development, and gradually adopt oxygen-enriched coal injection, high blast temperature, high pressure operation top new smelting technology, etc. Blast furnace lining working conditions with significant changes have taken place, its service life to reduce more, usually only 5 ~ 6 years. Especially in blast furnace body and furnace waist, abdomen, its service life is shorter. In order to adapt to the development of blast furnace refractories have greater change, long life and efficient new refractory materials has been applied gradually, gradually increase blast furnace life.
According to the operating conditions of blast furnace lining and erosion characteristics of the refractory with:
Good high temperature performance, in the long-term thermal stability under high temperature.
Under normal temperature and high temperature strength, wear-resisting performance is better.
High density, good thermal conductivity, low porosity, high temperature shrink.
Can resist high temperature, high pressure of molten iron, slag, blast furnace gas and furnace dust of severe erosion and erosion.
Refractory brick shape size accurate, can ensure that reach the requirements of the brick joints.
At present, a lot of varieties of blast furnace refractories, furnace body in the performance of commonly used upper clay bricks or high alumina brick, furnace body parts, belly and bosh with carbon products, carborundum brick, mullite brick, corundum brick, such as special refractories, especially the recently developed carborundum brick, succeeded in the application of blast furnace. At the same time, other monolithic refractories has been widely used.
