Requirements of Medium Frequency Smelting Furnace for Coke First of all, it is necessary to understand the function of the intermediate frequency furnace in the smelting process. The results show that in the process of medium frequency smelting furnace, the role of coke is not only the main provider of heat (accounting for more than 95%) but also the main heat transfer medium in the superheated zone of molten iron. Most of the overheated heat is directly transferred from coke to molten iron droplets (Accounting for more than 85%). At the same time, coke is also the source of hot metal carburization and sulfur addition. In addition, coke is the main source of hot metal in the smelting process In order to keep the whole smelting process normal, stable and continuous, it can bear the pressure of the upper material column at high combustion temperature. According to the role of coke in medium frequency smelting furnace, and considering the structure and operation characteristics of the cup