High temperature cement has an extremely important application in the steel industry, mainly in the following aspects:

I. Masonry and repair of blast furnace lining

High temperature cement is the key material for lining building of blast furnace. It is used for bonding between refractory bricks, and can withstand the high temperature environment in blast furnace (usually above 1400℃) and resist the erosion of molten iron and slag. In the daily maintenance of blast furnace, high temperature cement is also used to repair cracks or local damage of lining, and the normal operation of blast furnace is ensured through rapid curing and high strength bonding.

II. Refractory bonding of steelmaking converter

In steelmaking converter, the maximum service temperature of high-temperature cement and its refractory masonry can reach above 1600℃. This kind of cement can remain stable in the oxidizing atmosphere, which ensures the close bonding of refractory bricks in the converter lining and prevents the erosion and infiltration of high temperature slag.

III. Masonry and maintenance of heating furnace and hot blast stove

High temperature cement is widely used in the masonry of heating furnace and hot blast stove. It not only has good high temperature resistance, but also can resist the erosion and thermal shock of high temperature airflow. In these furnace types, high-temperature cement is used to build lightweight insulating brick and insulating brick, ensuring the thermal insulation performance and structural stability of the furnace body.

IV. Thermal insulation and corrosion-resistant coatings for industrial furnaces

High-temperature cement can be mixed with high-aluminum powder or other refractory materials to make heat insulation coating or anti-corrosion coating, which can be applied to the furnace wall. This coating can effectively reduce the heat loss of furnace wall, improve the thermal insulation performance of furnace body and prolong the service life of furnace lining.

V. Quick repair and construction

In the process of iron and steel production, the rapid repair of equipment is very important. High temperature cement has the characteristics of rapid solidification and high strength, which can repair cracks or damaged parts of furnace lining in a short time and reduce the shutdown time. For example, when repairing the furnace, a proper amount of refractory particles can be added to the cement when the cracks are too large to enhance the filling effect.

VI. Energy Saving and Economy

The lining built with high-temperature cement has good thermal insulation and corrosion resistance, which can reduce heat loss and energy consumption. In addition, the high-temperature cement has a long service life, which reduces the replacement frequency of furnace lining and the maintenance cost.

VII. Solutions to special working conditions

Under some special working conditions, such as the blast furnace slag cooling exhaust chimney (the temperature is above 160℃ and contains acid), high temperature cement can also provide effective protection. For example, Laiwu iron and steel, Rizhao iron and steel and other enterprises have used acid-resistant high-temperature cement to solve such problems.

To sum up, high-temperature cement is widely used in steel industry, which can not only meet the fire-resistant demand in high-temperature and high-erosion environment, but also improve production efficiency and reduce maintenance cost. It is an indispensable refractory material in steel production.