The special use of sintered mullite in hot blast stoves is mainly reflected in the following aspects:

I. Key materials of ceramic burner

Sintered mullite is used to make special bricks for ceramic burner of hot blast stove because of its excellent high temperature performance and thermal shock resistance. For example, the developed mullite-andalusite-cordierite brick, by adding cordierite and andalusite, significantly improves the thermal shock resistance and load softening temperature of the material, so that it can meet the requirements of complex and harsh working conditions of hot blast stove burners.

II. Lining materials for vault and combustion chamber

Sintered mullite brick and castable are widely used in the vault of hot blast stove and the middle and upper part of combustion chamber. These parts need to withstand high temperature airflow and frequent temperature changes. The high refractoriness, low creep and good thermal shock resistance of sintered mullite make it an ideal material choice.

III. Research and Development of High Efficiency Checked Brick

Sintered mullite is also used to develop high-efficiency checker bricks. These checker bricks can improve the thermal efficiency of the hot blast stove and prolong its service life. The low thermal conductivity and good thermal insulation of sintered mullite are helpful to reduce heat loss.

IV. Thermal insulation layer of hot blast stove

Sintered mullite thermal insulation brick is used as thermal insulation layer of hot blast stove because of its low thermal conductivity and good thermal insulation performance. These bricks can effectively reduce the weight of the furnace and save energy.

V. Other parts of the hot blast stove

Sintered mullite is also used in other parts of hot blast stove, such as hot air main pipe and furnace wall. Its excellent corrosion resistance and high temperature strength enable it to effectively resist the erosion of high temperature airflow and slag.

To sum up, the application of sintered mullite in hot blast stove not only improves the high temperature performance and service life of equipment, but also provides a strong guarantee for the efficient operation of hot blast stove through its excellent thermal shock resistance and thermal insulation performance.