METHOD OF REFINING MOLTEN STEEL

摘要

A molten iron refining method according to the present invention includes a step of discharging slag generated in the prior step by tilting a steel converter when a discharge of molten iron produced in the prior step is completed; a step of inputting molten iron to be utilized in the current step into the steel converter; a step of refining molten iron; and a step of discharging slag after refining. As the number of using the steel converter is increased, the angle of tilting the steel converter is decreased. According to embodiments of the present invention minimize a dead zone where oxygen cannot affect in a refining process blowing oxygen. Therefore, the present invention can prevent a decrease in a refining rate caused by a dead zone in the refining process blowing oxygen. [Reference numerals] (AA) Adjusting a tilting angle of a furnace according to the number of using the furnace; (S100) Finishing a discharge of molten iron; (S200) Inputting CaO into slag; (S300) Excluding slag; (S400) Inputting the molten iron into the furnace; (S500) Primarily refining the molten iron; (S600) excluding slag of the primarily-refined molten iron; (S700) Secondarily refining the molten iron and inputting dolomite during secondarily refining; (S800) Discharging the molten iron