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The bottom you blow or production method null of the high containing nitrogen steel with the raised bottom blowing

机译:吹底或高底吹氮的高氮钢生产方法无效

摘要

PURPOSE:To stably produce a high nitrogen steel at a low cost by throwing specific amounts of coke into a molten steel at the point of time when C content in the molten slag reaches a specific value in a top and bottom blown converter, recovering an unburnt exhaust gas, and then bottom-blowing the prescribed amounts of N2 gas. CONSTITUTION:In a bottom blown or top and bottom blown converter for steel making, coke is thrown into a molten steel by 6-8kg/ch.t when C content in the molten steel reaches 1.0-0.3wt.%. Subsequently, at the point of time when the recovery of an unburnt exhaust gas in the converter is completed, an N2 gas in the amount corresponding to the amount of burnt lime used for refining is blown through tuyeres in the bottom. By this method, the steel with =60ppm nitrogen content can stably be obtained at a low cost without using a manganese nitride ferroalloy.
机译:目的:通过在顶吹和底吹转炉中的熔融炉渣中的C含量达到特定值时,将一定量的焦炭倒入熔融钢中,以低成本稳定地生产高氮钢,从而回收未燃烧的物料排气,然后吹入规定量的N2气体。组成:在炼钢的底吹或上下吹炼转炉中,当钢水中的C含量达到1.0-0.3wt。%时,焦炭以6-8kg / ch.t的速度倒入钢水中。随后,在转炉中未燃烧废气的回收完成的时间点,通过底部的风口吹入与用于精炼的生石灰量相对应的量的N 2气体。通过这种方法,可以在不使用氮化锰铁合金的情况下以低成本稳定地获得氮含量≥60ppm的钢。

著录项

  • 公开/公告号JPH0686614B2

    专利类型

  • 公开/公告日1994-11-02

    原文格式PDF

  • 申请/专利权人 川崎製鉄株式会社;

    申请/专利号JP19900031597

  • 发明设计人 浜上 和久;

    申请日1990-02-14

  • 分类号C21C5/30;C21C5/34;

  • 国家 JP

  • 入库时间 2022-08-22 04:55:48

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