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公开(公告)号:US5868817A
公开(公告)日:1999-02-09
申请号:US571859
申请日:1996-07-15
申请人: Masataka Yano , Yuji Ogawa , Masayuki Arai , Fumio Koizumi , Noriyuki Masumitsu , Hideaki Sasaki , Hiroshi Hirata , Yoshiaki Kusano , Hirobumi Maede, deceased , by Noriko Kawai , by Keiko Ikemizu
发明人: Masataka Yano , Yuji Ogawa , Masayuki Arai , Fumio Koizumi , Noriyuki Masumitsu , Hideaki Sasaki , Hiroshi Hirata , Yoshiaki Kusano , Hirobumi Maede, deceased , by Noriko Kawai , by Keiko Ikemizu
摘要: The present invention provides a process for efficiently dephosphorizing, dephosphorizing and decarbonizing, or desulfurizing, dephosphorizing and decarbonizing a hot metal in a converter. The amount of flux to be charged and the amount of bottom-blown gas are adjusted so that the bottom-blowing agitation power and the CaO/SiO.sub.2 ratio subsequent to the treatment become at least 0.1 kW/ton and from 0.7 to 2.5, respectively and the hot metal temperature at the treatment end point becomes from 1,200.degree. to 1,450.degree. C. Furthermore, the operation of the process is controlled so that the sum of a T.Fe concentration and a MnO concentration in the slag subsequent to the treatment becomes from 10 to 35% by weight by adjusting the top-blown oxygen feed rate, the flow rate of bottom-blown gas or the top-blowing lance height.
摘要翻译: PCT No.PCT / JP94 / 01070 Sec。 371日期:1996年7月15日 102(e)1996年7月15日PCT 1994年6月30日PCT公布。 公开号WO95 / 01458 日期1995年1月12日本发明提供了一种在转化器中有效脱磷脱磷脱碳脱硫脱硫脱碳脱碳的方法。 对被充电的通量和底吹气体的量进行调节,使得处理后的底吹搅拌力和CaO / SiO 2比分别变得至少为0.1kW / ton和0.7至2.5, 处理终点处的铁水温度为1200〜1450℃。此外,控制处理的操作,使得处理后的炉渣中的T.Fe浓度与MnO浓度的和变为 10至35重量%,通过调节最高的氧气进料速率,底吹气体的流量或顶吹喷枪的高度。