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Development of Technology for Producing Ultra Low Sulphur Steel by RH Powder Top Blowing Method

机译:RH粉末顶吹法生产超低硫钢的技术发展

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摘要

In order to obtain ultra low sulphur and nitrogen steel for producing high grade electromagnetic steel, the RH-PB (Powder Top Blowing) method was developed for use in a 160t RH.In this method, the pulverized desulphurizer is blown into molten steel from a top-blowing lance with an argon gas carrier under reduced pressure in RH treatment.Since 199o, this method has been under commercial operation in a 160t RH at the Wakayama Steel Works and S and N as low as 5 and 15 ppm have been obtained.Further, the total refining time, from the end of tapping to the start of casting, was reduced by 40 percent.
机译:为了获得用于生产高等级电磁钢的超低硫和氮钢,开发了RH-PB(粉末顶吹)方法,用于160t RH。自199o起,该方法在和歌山钢铁厂在160t RH下商业化运行,自199o起,硫和氮的含量分别低至5和15 ppm。此外,从出钢结束到铸造开始的总精炼时间减少了40%。

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