【作者】 吴伟； 孟华栋； 刘浏；

【Author】 WU Wei;MENG Hua-dong;LIU Liu;Metallurgical Technology Research Department of Central Iron and Steel Research Institute;

【机构】 钢铁研究总院冶金工艺研究所；

【摘要】 研究了300 t转炉少渣条件下转炉溅渣后炉渣的熔化特性。从岩相分析上看,少渣冶炼溅渣后炉渣中主要含有CS、C₂S、RO相及中间相,炉渣中TFe含量较高,磷含量较低。通过少打水的方法对少渣冶炼的炉渣进行处理,返回到脱磷炉中作为炉料使用。结果表明,炉渣中含有一定量的铁酸钙,有利于脱磷和化渣。从应用的效果看,通过每炉次加入3⁶ t的返回渣,每炉可节省石灰0.7¹ t,终点成分控制达到了要求。加入返回渣的脱磷炉终点炉渣的岩相组成主要是硅酸二钙、RO相和玻璃相,与不加返回渣得到的脱磷炉终渣成分的相差不大。更多还原

【Abstract】 The slag melting characteristic after slag splashing for 300 t BOF less slag process is researched.The results of the petrographic analysis show the main component of slag after slag splashing is C₃S,C₂S,RO phase and C4 AF phase.There is higher total iron and phosphorus content in slag.The steel slag in the decarburization converter is treated by little water-spreading methods,which is used as the furnace burden of the dephosphorization converter.The results show there are a lot of calcium ferrite in the slag,which is beneficial to dephosphorization and slag melting.The recycling slag is added to dephosphorization converter each charge by 3 or 6 t.The results show that the saving lime is 0.7 1 t each charge.The petrographic constitute of final slag for the dephosphorization converter by adding the recycling slag is dicalcium silicate,RO phase and glass phase.There is a little calcium ferrite phase in the recycling slag,which is helpful to dephosphorization.So there are better dephosphorization effects for the recycling slag.更多还原