When charging, the carbonizer is stirred with the charge and placed at the bottom and middle of the induction furnace, which has a higher carbonization efficiency. When adding, generally all along with the other charge a piece to join, the second furnace up in the remaining liquid iron 200-400KG on the funds into the plastic bag loaded with carbonizer funds into the liquid iron bit. Carbonizer is how much the case is generally stipulated that every 100 kilograms of scrap steel to join the carbonizer 3-4KG up and down, this percentage to add the carbonizer is a suitable percentage. Coreless induction furnace smelting cast steel parts, cast iron target composition, a variety of furnace charge preparation and a variety of other processing technology elements, are all affecting the carbonizing efficiency of the carbonizer.