含铌铁水底吹氧气脱碳保铌的研究  

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

作　　者：徐掌印[1] 赵增武[1] 李保卫[1] 姜银举[1] 

机构地区：[1]内蒙古科技大学内蒙古自治区白云鄂博矿多金属资源综合利用重点试验室,内蒙古包头014010

出　　处：《炼钢》2015年第1期44-47,51,共5页Steelmaking

基　　金：国家自然科学基金项目(51164024);教育部新世纪优秀人才支持计划项目(NCET-10-0911);内蒙古自然科学基金(2013MS0716)

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Si O2-Ca O-Ca F2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1 475℃吹炼时硅的氧化率为15%,碳的氧化率为84%;铁水中硅的质量分数下降到0.1%,铌含量不变;在1 515℃,加入酸性Si O2-Ca O-Ca F2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。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, 1 475 and 1 515 ℃. 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 1 350 ~C ; however, oxidation rate of silicon was 15 ~ at 1 475 ~C and oxidation rate of carbon was 84 % at 1 515 ~C 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 1 515 ℃, by which decarburization and conservation of niobium was carried out during bottom-blown oxygen.

关 键 词：含铌铁水 底吹氧气 含CaO造渣剂 脱碳保铌 

分 类 号：TF703.5[冶金工程—钢铁冶金]