Sintered mullite has obvious advantages in the thermal insulation layer of hot blast stove, mainly in the following aspects:

I. Low thermal conductivity and excellent thermal insulation effect

Sintered mullite thermal insulation brick has low thermal conductivity, which can effectively reduce heat loss, improve the thermal insulation effect of hot blast stove, and thus reduce energy consumption. This low thermal conductivity makes mullite thermal insulation brick can significantly reduce the heat transfer in high temperature environment and maintain the stability of the temperature in the furnace.

II. Low thermal capacity and energy-saving effect

Because of the low thermal conductivity, the sintered mullite thermal insulation brick accumulates less heat energy, which is especially suitable for intermittent operation of hot blast stoves. In the process of heating up, this material can significantly reduce the required energy consumption and improve the thermal efficiency.

III. High fire resistance and chemical stability

Sintered mullite thermal insulation brick has very low impurity content, such as iron and alkali metal oxides, so it has high fire resistance and can maintain excellent performance in high temperature environment. In addition, the high alumina content makes it maintain good performance in reducing atmosphere and is not easy to be corroded.

IV. Excellent hot compressive strength

Even in high temperature environment, the sintered mullite thermal insulation brick can still maintain high mechanical strength, ensuring the long-term stability of the hot blast stove lining. This high strength characteristic is helpful to prolong the service life of furnace lining and reduce the maintenance cost.

V. Accurate size and convenient construction

The appearance size of sintered mullite thermal insulation brick is accurate, which can reduce the adjustment process during masonry, speed up the construction and reduce the amount of refractory mud. In addition, this kind of brick can also be processed into special shapes according to actual needs, reducing the number of bricks and joints, and further optimizing the structure of the hot blast stove.

VI. Reduce the furnace weight

Sintered mullite thermal insulation brick is a lightweight material, which can significantly reduce the overall weight of hot blast stove without affecting its thermal insulation performance.

VII. Extending the service life of equipment

The low thermal conductivity and high refractoriness of sintered mullite thermal insulation brick enable it to run stably in high temperature environment for a long time, reduce the damage of hot blast stove lining, and thus prolong the service life of equipment.

To sum up, the application of sintered mullite in the thermal insulation layer of hot blast stove can not only significantly improve the thermal insulation effect and energy saving efficiency of hot blast stove, but also prolong the service life of equipment and reduce the maintenance cost.