公开(公告)号：EP0146696B1

公开(公告)日：1987-11-25

申请号：EP84111365.7

申请日：1984-09-24

申请人： Nippon Steel Corporation

发明人： Ikehara, Yasunobu c/o Hikari Works ,  Ariyoshi, Haruki c/o Hikari Works ,  Hidaka, Ryoichi c/o Hikari Works

IPC分类号： C21C7/068 ,  C21C5/00

CPC分类号： C21C7/064 ,  C21C5/005 ,  C21C7/0685

公开(公告)号：EP0146696A1

公开(公告)日：1985-07-03

申请号：EP84111365.7

申请日：1984-09-24

申请人： Nippon Steel Corporation

发明人： Ikehara, Yasunobu c/o Hikari Works ,  Ariyoshi, Haruki c/o Hikari Works ,  Hidaka, Ryoichi c/o Hikari Works

IPC分类号： C21C7/068 ,  C21C5/00

CPC分类号： C21C7/064 ,  C21C5/005 ,  C21C7/0685

摘要： The refining of chromium-containing molten steel by decarburization, reduction, and desulfurization is improved in terms of consumption of argon gas used for blowing molten steel, wear and tear of refractories of the AOD furnace, and consumption of CaO and CaF 2 , etc. by a process which comprises the addition of metallic Al as a reducing agent and CaO as a slag-forming agent to the slag existing after completion of the decarburization, respectively in amounts necessary for the slag, after completion of the subsequent reduction, to acquire a SiO 2 content of not more than 10% and a CaO/Al 2 O 3 ratio in the range of 0.8 to 2.0, thereby enabling the treatments of reduction and desulfurization to proceed simultaneously.