Ladle and ladle capping technology has applied for national patent At present, the vast majority of domestic iron and steel enterprises use open hot metal tanks to hold hot metal and transport it from the blast furnace to the steelmaking operation area by diesel locomotive or automobile. The distance is relatively far, usually up to several thousand meters, and this section of the road is open-air, with long transportation and waiting time. In addition, the molten iron ladle is open, and the molten iron is in direct contact with the air.