Hot blast furnace is the blast furnace heating air equipment, is one of the main supporting equipment for ironmaking blast furnace, generally a blast furnace with 3 to 4 hot blast furnace, the role of the hot blast furnace is to continuously provide the blast furnace with more than 1000 ℃ of high temperature hot air, advanced hot blast furnace wind temperature can reach 1300 ℃.

Hot blast stove Schematic diagram

Hot blast stove Introduce

The hot blast furnace can be divided into several types according to the furnace type, such as top combustion type, internal combustion type, external combustion type, etc. It is usually composed of heat storage room, combustion room, burner, hot air pipe, etc. The refractory materials used in the hot blast furnace will be changed according to the goal of achieving high air temperature and long life. With the large-scale blast furnace, countries around the world have put forward the goal of achieving high air temperature and long life, then the refractory materials used in hot blast furnace will also change.

In order to ensure the realization of the requirements of high wind temperature and long life, the refractory materials for hot blast stove should have the following main functions:

1. large heat capacity, good hot air conductivity;

2. low porosity, low permeability, high bulk density;

3. high strength, good thermal shock stability;

4. high load softening point, small change of re-burning line;

5. good creep resistance, good erosion resistance;