Explanation
The end air passage and its refractory that supply air to the metal bath can improve the smelting efficiency and effect. Some refractory materials are corundum spinel, magnesia carbon, etc. The air passage can be a slit reserved during pouring, a porous ceramics core with good air permeability and a thin stainless steel tube. For ladle, converter, electric arc furnace, ferroalloy furnace, etc
Classification
Inorganic non-metallic materials -> Refractory materials