Development of a rammed lining for a coreless induction furnace

One of the most important problems in the growth of induction-furnace steelmaking is increasing the service life of the basic lining of the rammed crucibles while simultaneously reducing its cost. The main lining, which is subjected to a great number of thermal cycles in service, has a short life. The addition of a large quantity of alloying materials and deoxidizers shortens the effective life of the crucibles still further. Fused magnesite (periclase), recommended for ramming the basic lining, is still very expensive and does not significantly increase service life when the number of thermal cycles is large.