公开(公告)号：EP2816125A4

公开(公告)日：2015-03-04

申请号：EP12871396

申请日：2012-03-13

申请人： ANGANG STEEL CO LTD

发明人： TANG FUPING ,  LI ZHEN ,  WANG XIAOFENG ,  FEI PENG ,  MENG JINSONG ,  ZHANG YUE ,  MA YONG ,  WANG WENZHONG ,  ZHANG ZHIWEN ,  WANG XIAOSHAN ,  GUO MENG ,  ZHAO ZHIGANG ,  LIN YANG ,  XIN GUOQIANG ,  YAO WEIZHI

IPC分类号： C21C7/04 ,  C21C5/28 ,  C21C7/064

CPC分类号： C21C7/064 ,  B22D11/001 ,  C21C1/025 ,  C21C5/35 ,  C21C5/36 ,  C21C7/0043 ,  C21C7/0068 ,  C21C7/0087 ,  C21C7/0645 ,  C21C7/072 ,  C21C7/10 ,  C21C2300/08

摘要： A method for preparing low-cost clean steel includes steps of: preliminarily desulfurizing iron melt: preliminarily desulfurizing in an iron melt channel during blast furnace tapping and during iron folding in an iron folding room, adding a desulfurizing ball into the iron melt during the blast furnace tapping or the iron folding; dephosphorizing and controlling sulfur: dephosphorizing and controlling sulfur during converter steelmaking, in such a manner that P ‰¤ 0.014% and S ‰¤ 0.004% during tapping; rapidly dephosphorizing by slag-forming: rapidly dephosphorizing by slag-forming during converter tapping, at a converter end point, controlling a C content at 0.02ˆ¼0.10%, adding a dephosphorizing ball through an alloy chute during the converter tapping, blowing argon and stirring at the same time; purifying steel melt during RH refining: adding a purifying ball at a late stage of the RH refining when a vacuum degree is at 66.7ˆ¼500Pa; and continuously casting with whole-process protection. According to the present invention, steel quality is effectively improved while cost is lowered. Compared with the conventional process, raw materials utilized in the method are cheap, the cost per ton of steel is reduced by5-10 Yuan.

摘要翻译： 制备低成本清洁钢的方法包括以下步骤：预先将铁熔体脱硫：在高炉出钢期间和铁折叠期间的铁熔体通道中预先脱硫，在铁折叠室中铁折叠期间，在爆炸期间向铁熔体中加入脱硫球 炉膛或熨斗折叠; 脱磷控硫：转炉炼钢过程中硫酸脱磷控制方式，采that‰‰‰‰‰‰‰‰‰‰‰‰‰‰‰;;;¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤;;;;;;;; 通过成渣快速脱磷：在转炉攻丝期间，在转炉终点处通过成渣快速脱磷，控制C含量为0.02〜0.10％，在转炉攻丝期间加入脱磷球通过合金槽，吹入氩气和 同时搅拌; 在精炼过程中净化钢材熔体：当真空度为66.7 / 500Pa时，在RH精炼的后期添加净化球; 并持续铸造全过程保护。 根据本发明，在降低成本的同时有效地提高了钢质量。 与传统工艺相比，该方法使用的原料便宜，每吨钢材成本降低5-10元。