- Time:Jul 05, 2023
The molten iron ladle is the key equipment for heat preservation, keeping molten iron molten and conveying, and its interior is lined with refractory materials. The refractory material is subjected to multiple effects such as high temperature shock, chemical erosion and mechanical stress on the inner surface of the ladle, so its service life will be affected by many factors. The following are the main factors affecting the service life of ladle refractories:
1. Material selection: It is very important to choose a refractory material suitable for the working conditions and requirements of the ladle. Common refractory materials include high alumina refractory bricks, silicate refractory bricks, silicon carbide refractory bricks, etc. Different materials have different refractoriness, corrosion resistance and mechanical strength, and choosing the right refractory material will directly affect the service life.
2. Operating temperature: The operating temperature range of the ladle is usually between 1400°C and 1700°C. Exceeding the rated temperature of the refractory material will accelerate its aging and wear, and reduce the service life. Therefore, it is very important to strictly control the working temperature of the ladle and choose a refractory material that matches the working temperature.
3. Cooling and heating cycle: The ladle undergoes cooling and heating cycles during use. This cold and hot cycle will cause thermal expansion and contraction of the refractory material, which will easily cause problems such as cracking, spalling and slag, thereby reducing the service life. Therefore, reasonable control of the frequency and amplitude of cooling and heating cycles, and the selection of refractory materials with good thermal shock stability can prolong the service life.
4. Chemical erosion: The molten iron inside the ladle contains certain chemical components, which react chemically with refractory materials, resulting in erosion and corrosion. Chemical attack will gradually destroy the structure and performance of refractories, reducing their life. Choosing refractory materials with good corrosion resistance and effective lining protection measures can slow down the damage caused by chemical erosion.
5. Construction quality and maintenance: The service life of ladle refractories is also closely related to construction quality and maintenance. Correct installation and maintenance measures, such as masonry quality, cement ratio, masonry process, regular inspection and maintenance, etc., can improve the performance and service life of refractory materials.
Overall, ladle refractory life is affected by several factors. By selecting appropriate refractory materials, controlling operating temperature, reducing hot and cold cycles, preventing chemical erosion, and high-quality construction and maintenance, the life of refractory materials in ladles can be extended and the safe and stable operation of ladles can be ensured.
