Abstract: The tube bloom steel J55-0.32～0.38C,1.25～1.55Mn is produced by 92 t EBT are fumace-92 t ladle furnace(LF)at Chengdu lron and Steel,Pangang Group. With controlling [C]≥0. 10%,[P] ≤ 0.015 at arc furace tap- ping,adding silicon- aluminium- barium deoxidant 200 kg/heat at EBT tapping a quarter of metal to decrease the oxygen content in molten steel,and with controlling FeO content in slag during LF refining,the sulfur content in steel shall be lower than 0.015%.During LF refining with feeding Al wire,argon stiring for 15 min than feeding 0.4~0.6 Kg/t CaSi wire to promote inclusion floating off,the nozzle clogging could be prevented.

Key words: Tube Bloom Steel, Ladle Furnace, Refining

摘要： 攀钢集团成都钢铁公司采用92 t偏心底(EBT)电弧炉-92t钢包炉生产成分(%):0.32~0.38C,1.25~1.55Mn J55管坯钢。电弧炉出钢时[C]≥0.10%,[P]≤0.015%;EBT出钢约1/4时,加入硅铝钡脱氧剂200kg/炉,通过控制LF精炼时渣中FeO浓度小于0.5%,可使钢中S含量低于0.015%。在LF处理时,通过喂Al线吹氩8~15 min后再喂0.4~0.6kg/t CaSi线处理,以促进夹杂物上浮,防止中间包水口堵塞。

关键词: 管坯钢, LF, 精炼