Optimization of material structure in converter steelmaking process

The varying characteristics of steel material consumption, oxygen consumption, and converter gas volume were studied when different ferrous materials and different proportions of limestone were used in 60 t converter. The results show that when liquid steel is used as raw material and mixture of slag-steel and lump ore as coolants, the steel material consumption per ton steel is the min-imum (only 1072.07 kg), and when liquid steel and scrap steel are used as raw materials and slag-iron by magnetic separation as coolant, the steel material consumption per ton steel reaches the maximum (1092.91 kg). Meanwhile, with the increase of the amount of limestone, the steel material consumption is increased, the oxygen consumption is slightly decreased, and the gas volume is im-proved. The results will provide a new method for optimizing the material structure and reducing the production cost in steelmaking process.