炼钢 ›› 2015, Vol. 31 ›› Issue (1): 44-47.

• 试验研究 • 上一篇    下一篇

含铌铁水底吹氧气脱碳保铌的研究

徐掌印1,赵增武1,姜银举2,李保卫3   

  1. 1. 内蒙古科技大学
    2. 内蒙古包头市内蒙古科技大学材料与冶金学院
    3. 内蒙古包头市内蒙古科技大学
  • 收稿日期:2014-04-28 修回日期:2014-06-12 接受日期:1900-01-01 出版日期:2015-02-05 发布日期:2015-02-13
  • 通讯作者: 赵增武 E-mail:zhzengwu@hotmail.com
  • 基金资助:
    国家自然科学基金;内蒙古自然科学基金

Study on decarburization and conservation of niobium in Nb-bearing hot melt by bottom-blown oxygen

  • Received:2014-04-28 Revised:2014-06-12 Accepted:1900-01-01 Online:2015-02-05 Published:2015-02-13

摘要: 通过中频炉底吹氧气冶炼含铌铁水,在1 350、1 475、1 515 ℃,加入SiO2-CaO-CaF2造渣剂或在无渣条件下研究了铁水中碳、硅和铌的氧化规律。结果表明,底吹氧气在1 350 ℃时加入碱性造渣剂或不加造渣剂时铁水中硅的氧化率为97 %,碳的氧化率为 20 %,而在1 470 ℃吹炼时硅的氧化率为15 %,碳的氧化率为84 %;铁水中硅的含量下降到0.1 %,铌含量不变;在1 515 ℃,加入酸性SiO2-CaO-CaF2造渣剂高温底吹氧气冶炼时铁水中的碳质量分数下降至0.66 %,实现了脱碳保铌。

关键词: 含铌铁水, 真空, 氧化, 脱碳, Fe3O4

Abstract: The oxidation of carbon, silicon and niobium in Nb-bearing hot metal were studied in a medium-frequency induction furnace by bottom-blown oxygen with SiO2-CaO-CaF2 slag-forming element or no slag at 1 350 ℃,1475 ℃ and 1515 ℃. The results showed that oxidation rate of silicon in Nb-bearing hot metal with SiO2-CaO-CaF2 slag or no any slag was 97 %, and oxidation rate of carbon was 20 % at 1350 ℃; however, oxidation rate of silicon was 15 % at 1475℃ and oxidation rate of carbon was 84 % at 1515℃ with basic SiO2-CaO-CaF2 slag. Niobium mass fraction of the hot metal was not change until silicon content decreased to 0.1 %. The carbon content decreased to 0.66 % with acid SiO2-CaO-CaF2 slag-forming element at 1515℃, by which decarburization and conservation of niobium was carried out during bottom-blown oxygen.

Key words: Nb-bearing hot metal, Vacuum refining, Oxidization, Decarburization, Fe3O4