Excuse me, what material is the container for molten steel in the steelmaking furnace made of?

Acid refractories and basic refractory. Most of them are oxides with high melting point.

Silicon dioxide, like acid-resistant refractories, can resist the high temperature of 1700 degrees Celsius; The magnesia-carbon brick in basic refractory can withstand the high temperature of more than 2000 degrees. The temperature of steelmaking is usually around 1600 degrees.

Although the refractory in the steelmaking furnace is very thick, it will be corroded and peeled off by high-temperature molten steel in use, so it is necessary to use a special machine to spray refractory to repair the damaged parts, and its service life is limited.