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Development of Deep Desulphurization Process for X65 HIC Resistant Pipeline Steel

机译:X65耐HIC管线钢深度脱硫工艺的发展。

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摘要

The effect of ladle slag composition, bottom stirring intensity, and refining duration on desulphurization (De-S hereafter) behavior was investigated in ladle furnace (180t) through production data analysis and plant scale experiments. The results show that the ladle slag composition for deep De-S is W(Ca0): 50%55%, w>(caF2v 3%-7%, w(Ai2O3): 20%-25%, w(Si02) <10%, w(Mgo) <10%, and w(FeO)<0.5%; De-S ratio doubled from around 10% to around 20%, within the selected period of 8 min with the increase of Ar flowrate of bottom blowing from 400 L/min to 600 L/min; sulfur can be reduced to less than 10 ppm from around 35 ppm within 20 min if the Ar flowrate is kept at 600 L/min; during steelmaking trial of X65 HIC resistant steel, the sulfur content of final product was controlled to be below 10 ppm when sulfur content of the melt at BOF blowing end was kept below 60 ppm, De-S was carried out with the above mentioned slag, and 600 L/min Ar stirring for more than 20 min.
机译:通过生产数据分析和工厂规模试验,研究了钢包炉渣成分,底部搅拌强度和精炼持续时间对钢包炉(180t)中脱硫行为的影响。结果表明,深De-S钢包渣成分为W(Ca0):50%55%,w>(caF2v 3%-7%,w(Al2O3):20%-25%,w(SiO2)< 10%,w(Mgo)<10%,w(FeO)<0.5%;在选定的8分钟内,随着底部吹出Ar流量的增加,De-S比率从约10%翻倍至约20%从400 L / min到600 L / min;如果将Ar流量保持在600 L / min,则硫可以在20分钟内从35 ppm降低到10 ppm以下;在X65 HIC耐蚀钢的炼钢试验中,硫当在BOF吹塑端的熔体的硫含量保持在60ppm以下时,将最终产物的含量控制在10ppm以下,用上述炉渣进行De-S,并以600L / min的Ar搅拌超过20。分钟

著录项

  • 来源
  • 会议地点 Shenyang(CN)
  • 作者单位

    Steelmaking and Casting Group, Institute of Research of Iron and Steel of Jiangsu (Shasteel), Suzhou 215625, Jiangsu, China;

    Steelmaking and Casting Group, Institute of Research of Iron and Steel of Jiangsu (Shasteel), Suzhou 215625, Jiangsu, China;

    Steelmaking and Casting Group, Institute of Research of Iron and Steel of Jiangsu (Shasteel), Suzhou 215625, Jiangsu, China;

    Steelmaking and Casting Group, Institute of Research of Iron and Steel of Jiangsu (Shasteel), Suzhou 215625, Jiangsu, China;

    Hongfa Steelmaking Plant, Shasteel Group, Suzhou 215625, Jiangsu, China;

    Hongfa Steelmaking Plant, Shasteel Group, Suzhou 215625, Jiangsu, China;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 炼钢;
  • 关键词

    ultra low sulfur; LF De-S; HIC resistant;

    机译:超低硫低频De-S;耐HIC;;

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