用CaO-CaF_2-FeO系渣进行钢水深脱磷  

Deep Dephosphorization of Liquid Steel with CaO-CaF_2-FeO Slag

作　　者：田志红[1] 艾立群[1] 蔡开科[1] 石洪志[2] 王涛[2] 郑建忠[2] 朱立新[2] 

机构地区：[1]北京科技大学冶金学院,北京100083 [2]上海宝山钢铁股份有限公司技术中心,上海201900

出　　处：《钢铁研究学报》2004年第5期23-27,共5页Journal of Iron and Steel Research

摘　　要：为了生产超低磷钢,在1600℃用高碱度CaO CaF2 FeO系渣对低磷钢水进行了炉外深脱磷的研究。分析了氧化性和碱度对脱磷效果的影响,确定了合适的渣系组成,测得1600℃下该渣系的磷容量在1018 54～1020 2范围内。实验结果表明:氧化性和碱度是影响脱磷效果的两个制约性因素;在钢水初始磷含量为0 01%左右的条件下,使用该渣获得了大于50%的脱磷率及低于0 005%(最低可达0 0027%)的磷含量;在300t转炉上进行的初步生产试验也获得了50%左右的脱磷率及0 006%左右的成品磷含量。In order to produce ultra-low phosphorus steel, the deep dephosphorization experiment of steel containing phosphorus about 0.01 % outside BOF was carried out by high basic slag of CaO-CaF_2-FeO at 1 600 ℃. The effect of process factors (oxidizability, basicity, etc.) on dephosphorization was analyzed and the appropriate composition of the flux was determined. The results show that oxidizability and basicity have reverse effect on dephosphorization and the dephosphosphorization ratio of 50 % and phosphorus content of 0.005 % or 0.002 7 % can be obtained by using this kind of flux when the initial phosphorus content in the liquid steel is about 0.01 %. The primary industrial trial in 300 t converter shows that 50 % dephosphorization ratio and phosphorus content of 0.006 % in finished steel are obtained.

关 键 词：低磷钢CaO-CaF2-FeO系渣 脱磷 

分 类 号：TF704[冶金工程—钢铁冶金]