LF（钢包炉）固体合成渣脱硫工业性试验研究  

INDUSTRIAL TEST OF SYNTHETIC SOLID SLAG FOR DESULPHURIZATION IN LF

作　　者：万真雅[1] 郭上型[1] 王进[1] 

机构地区：[1]华东冶金学院,马鞍山钢铁股份有限公司

出　　处：《钢铁》1995年第9期14-18,共5页Iron and Steel

摘　　要：以３０ｔＥＢＴ超高功率电炉为初炼炉和４０ｔＬＦ（钢包炉）作为精炼炉，使用ＣａＯ－ＣａＦ＿２系固体合成渣对Ｑ２３５钢进行钢包炉内脱硫工业试验。在本试验条件下，当ＥＢＴ电炉初炼钢液［Ｓ］＿初＝０．０３５％～０．０８１％时，最佳精炼渣碱度Ｒ＿ｂ＝（％ＣａＯ）／（％ＳｉＯ＿２）为２．０～２．６或Ｒ＿ｆ＝［（％ＣａＯ）＋（％ＭｇＯ）］／［（％ＳｉＯ＿２）＋（％Ａｌ＿２Ｏ＿３）］为１．５～２．０，渣指数（ＣａＯ）／（ＳｉＯ＿２）：（Ａｌ＿２Ｏ＿３）在０．１７～０．２６为宜，终渣中Σ（ＦｅＯ）＋（ＭｎＯ）含量应≤２．０％，渣量应在１．４％以上。对精炼后钢液中Σ［Ｏ］和［Ｎ］的分析表明，其氧化物夹杂和氮含量大为降低，均能满足试验钢种的质量要求。Using 30 t EBT ultra high power EAF as primary melting furnace and LF as refiningfurnace,industrial test for desulfurization of Q235 steel is conducted in ladle furnace with syntheticsolid slag of CaO-CaF_2 system. Under the test condition, when primary molten steel in EBT EAFcontains[S]_ini=0.035%～0. 081%,the optimum basicity of refining slag R_b=(%CaO)/(%SiO_2 )is 2.0～2.6 or R_f=(%CaO)+(%MgO)]/[(%SiO_2)+(%Al_2O_3)] is 1.5～2.0; slagindex (MI)(CaO)/(SiO_2):(Al_2O_3) should be controlled in range of 0.17～0.26;Σ(FeO)+(MnO)of final slag should be≤2.0%and slag mass is more than 1.4%. And by analysis ofΣ[O]and[N]contents in refined molten steel,it is found that oxide inclusions and nitrogencontent are sharply reduced and quality requirements of tested steel can be satisfied.

关 键 词：固体合成渣 脱硫 钢包炉 

分 类 号：TF769.2[冶金工程—钢铁冶金]