- Time:Jul 03, 2023
Ladle refractory castable is a refractory material used in the foundry industry, mainly to surround and protect the interior of the ladle (also known as casting ladle). The following is a detailed introduction to the selection and characteristics of ladle refractory castables:
一. Selection and features:
1. Refractory performance: ladle refractory castable has excellent refractory performance, can withstand high temperature impact and erosion, and maintain structural stability.
2. Thermal shock stability: The castable has good thermal shock stability and can maintain good structural integrity under severe temperature changes to prevent thermal shock cracks.
3. Corrosion resistance: Due to the presence of corrosive substances such as molten iron and slag inside the ladle, the refractory castable for the ladle needs to have excellent corrosion resistance to prolong the service life of the ladle.
4. Thermal conductivity: Ladle refractory castables need to have appropriate thermal conductivity to help evenly distribute the temperature of the molten iron, avoid local temperatures that are too high or too low, and ensure the quality of castings.
5. Construction performance: The castable has good construction performance, is easy to operate and pour, and can quickly solidify and harden, shortening the production cycle.
二. Material selection:
1. Refractory clay: Refractory clay is one of the main components of ladle refractory castables. It has good plasticity and high temperature resistance.
2. High alumina cement: High alumina cement is usually used as a gelling agent for refractory castables, which can provide good adhesion and corrosion resistance.
3. Silicate fiber: Silicate fiber is added to the castable to improve its thermal shock stability and thermal shock resistance.
4. Hard particles: such as dolomite, quartz sand, etc., used to increase the strength and fire resistance of castables.
三 Application:
1. Ladle lining: Ladle refractory castables are mainly used to surround and protect the interior of the ladle. It can resist the high-temperature impact and erosion of molten iron, prevent the leakage of molten iron, and maintain a certain temperature stability for the molten iron.
2. Ladle repair: When the inside of the ladle is damaged or worn, it can be repaired with refractory castables for the ladle. It can fill and repair the defective parts of the ladle and restore its refractory performance and function.
In conclusion, ladle refractory castables are widely used in the foundry industry because of their excellent refractory performance, thermal shock stability, erosion resistance and construction performance. It provides reliable protection and the ability to repair the ladle, ensuring a smooth casting process and high quality castings.
