Care sunt factorii care afectează durata de viață a cuptorului Materialele refractare?

There are many factors that affect the life of furnace cover refractory materials, including the performance of the material itself, operating conditions, operation methods and maintenance. The following is a detailed analysis of the main influencing factors.

Factors that affect the life of furnace cover refractory materials

1. Thermal shock. The temperature changes are caused by arc heating, steel tapping, and furnace cover movement.
2. Chemical erosion. Molten slag and molten steel splash onto the brick surface, causing chemical erosion, as well as the effects of CO, CO2, and SO2 in the furnace.
3. Arc radiation. Melting loss caused by heat radiation generated by arc heating.
4. Wear of high-speed airflow formed by high-speed dust extraction in the furnace;
5. Loosening of the arch structure due to the damage of the brick joints under the action of its own weight.

The combined effect of these factors has a significant impact on the life of the furnace cover. The ultra-high temperature caused by arc radiation intensifies chemical erosion; the erosion of molten slag and molten steel leads to the thinning of the lining thickness and structural changes of the refractory material, and accelerates the spalling and damage of the refractory material under the action of thermal shock.

Prin urmare, the refractory material for the furnace cover is required to have good thermal shock resistance, corrosion resistance to high-temperature slag splashing, good integrity, and a firm structure without cracking. The development trend of refractory materials for furnace covers is: bricks → prefabricated blocks → integral casting. The specific conditions of each country are different, and the materials used are not the same.