METHOD FOR DEPHOSPHORIZING MOLTEN IRON IN CONVERTER TYPE REFINING FURNACE

摘要

PPROBLEM TO BE SOLVED: To provide a method for dephosphorizing molten iron with which in the case of applying the dephosphorization to the molten iron in a converter type refining furnace, a large quantity of scraps containing a heavy weight of scrap can be melted. PSOLUTION: When the dephosphorization of the molten iron 2 is applied while melting the scrap 18 by using the converter type refining furnace 4 having a top and bottom blowing function; in the dephosphorization continuously applied in the above refining furnace, the dephosphorization having 10% combining ratio of the scrap, is applied as the first charge, and after applying this dephosphorization, the molten iron is tapped off under state of remaining non-melting scrap together with a part of molten iron and slag 3 in the refining furnace. Successively, only molten iron is charged into the refining furnace as the second charge and the dephosphorization is applied to this molten iron, and after applying the dephosphorization, this molten iron is tapped off and thereafter, the slag is discharged from the refining furnace, and after discharging this slag, again the same dephosphorization as the first charge and second charge is repeatedly applied. PCOPYRIGHT: (C)2008,JPO&INPIT