Phenyl silicone oil shows excellent high-temperature carbonization resistance in the lubrication of steelmaking continuous casting crystallizer, which is mainly due to its unique molecular structure and chemical properties. The following is an analysis of the characteristics of phenyl silicone oil, the mechanism of high-temperature stability, and the specific application in the continuous casting process:

1. Molecular structure and characteristics of phenyl silicone oil
Phenyl silicone oil is an organic silicon compound formed by partially replacing the methyl group in methyl silicone oil with phenyl, and a phenyl group is introduced into its molecular chain. This structure gives phenyl silicone oil the following characteristics:

High thermal stability: The introduction of phenyl groups improves the high-temperature resistance of silicone oil, making it difficult to decompose or carbonize at high temperatures.

Strong antioxidant property: Phenyl silicone oil has excellent antioxidant ability and can remain stable in a high-temperature oxidative environment.

Excellent lubrication performance: Phenyl silicone oil has good lubricity and viscosity-temperature characteristics, and can maintain a stable lubrication effect at high temperatures.

Chemical inertness: Phenyl silicone oil has good chemical inertness to metals and other materials and is not prone to chemical reactions.

2. Mechanism of high-temperature carbonization resistance of phenyl silicone oil
During the steelmaking and continuous casting process, the crystallizer lubricant needs to withstand extremely high temperatures (usually above 1500℃). Ordinary lubricants are prone to carbonization, decomposition or oxidation at this temperature, resulting in a decrease in lubrication performance or even failure. The high-temperature carbonization resistance of phenyl silicone oil is mainly reflected in the following aspects:

High-temperature thermal stability: The molecular chain of phenyl silicone oil is not easy to break at high temperatures, and can maintain the stability of its physical and chemical properties, thereby avoiding carbonization.
Antioxidation ability: The introduction of phenyl groups improves the antioxidant properties of silicone oil and reduces the carbonization reaction caused by high-temperature oxidation.
Low volatility: Phenyl silicone oil has low volatility at high temperatures and can be kept in the lubrication area for a long time, reducing lubrication failure caused by volatilization.
Good lubrication film formation ability: Phenyl silicone oil can form a stable lubrication film on the metal surface, reduce friction and wear between the metal and the crystallizer, and further reduce the risk of carbonization.

3. Application of phenyl silicone oil in continuous casting crystallizer lubrication
In the steelmaking continuous casting process, the main function of the crystallizer lubricant is to reduce the friction between the ingot and the crystallizer, prevent adhesion and cracking, and improve the surface quality of the ingot. Phenyl silicone oil has the following advantages as a crystallizer lubricant:

Extend the life of the crystallizer: The high-temperature carbonization resistance of phenyl silicone oil reduces the carbide deposition on the inner wall of the crystallizer, reduces the wear of the crystallizer, and extends its service life.
Improve the quality of the ingot: The excellent lubricating performance of phenyl silicone oil reduces the defects on the surface of the ingot (such as cracks, scratches, etc.) and improves the surface quality of the ingot.
Reducing energy consumption: Phenyl silicone oil can reduce friction resistance and reduce energy consumption during continuous casting.
Environmental protection: Phenyl silicone oil is non-toxic, odorless, environmentally friendly, and meets the environmental protection requirements of modern industry.

4. Comparison with other lubricants
Compared with traditional mineral oil, synthetic oil or graphite-based lubricants, phenyl silicone oil has obvious advantages in high-temperature carbonization resistance:

Mineral oil: It is easy to oxidize and carbonize at high temperatures, resulting in a decrease in lubrication performance.
Synthetic oil: Although it has good high temperature resistance, it may still decompose under extreme high temperatures.
Graphite-based lubricants: Although they have good lubrication properties, they may generate dust and pollute the environment under high temperatures.
Phenyl silicone oil has become an ideal choice for lubrication of steelmaking continuous casting crystallizers due to its excellent high temperature carbonization resistance, lubrication performance and chemical stability.