Effect of lance nozzle angle and mixing gas blowing on BOF process

摘要

The hot experiment was carried out to study the effect of lance nozzle and mixing gas blowing on steelmaking. The heat load of oxygen lance, component in the bath and dust generation were studied in the hot experiment under different lances and mixing blowing process. The absorbed heat is lower and the slag adhesion on the oxygen lance is reduced with the lance nozzle angle increasing. By using small portion of carbon dioxide as top gas is help to reduce the temperature in the impact area and decrease the dust generation, but the decarbonization rate decrease with the proportion of carbon dioxide increasing.