Research on refining technology began in 1968. At that time, it was found that the reduction refining effect was remarkable by pre-forming the reduction slag in the electric arc furnace, mixing the steel slag, and blowing the ladle with argon, so the development of the ladle refining technology with the arc heating function was carried out.

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.