- Time:Jun 30, 2023
There are many reasons for the failure of refractory materials for electric furnaces. The following are some common reasons:
1. High temperature thermal stress: The high temperature environment inside the electric furnace will cause the refractory materials to be affected by thermal stress. Frequent temperature changes and uneven temperature distribution can lead to cracks, breakage and spalling of refractory materials.
2. Chemical erosion: Inside the electric furnace, there are various chemical reactions and corrosive substances. These substances may chemically react with the refractory material, causing corrosion and erosion of the material, thereby reducing its service life.
3. Thermal shock: When the electric furnace is operating, a sudden temperature change or a sharp cooling process may cause thermal shock. This thermal shock can cause the refractory to crack, chip or peel off.
4. Mechanical shock: The electric furnace may be subject to mechanical shock during operation, such as the shock or vibration of the material. These impacts can have a damaging effect on the refractory material, causing breakage and wear of the material.
5. Sintering reaction: Inside the electric furnace, the refractory material may undergo sintering reaction with gas or metal at high temperature. This reaction will cause the alkali metal or metal ions on the surface of the material to penetrate into the interior of the material, causing embrittlement and destruction of the material.
6. Corrosive atmosphere: The atmosphere generated in some electric furnace operations may be corrosive, such as acid gas or gas containing corrosive substances. These atmospheres can attack the refractory material, leading to corrosion and destruction of the material.
The above are some common causes of damage to refractory materials for electric furnaces. In order to reduce damage, it is necessary to select appropriate refractory materials, control operating conditions, strengthen maintenance and overhaul work, and take corresponding protective measures according to actual conditions.
