Controlling Rephosphorization of Bearing Steel During Secondary Refining
-
摘要: 为了更好降低钢中回磷量,结合现场试验计算得出转炉出钢至精炼结束钢水回磷量、合金及辅料带入钢液的磷含量和转炉的下渣量,检测分析了各阶段炉渣成分和温度对精炼回磷的影响。结果表明:合金回磷和下渣回磷在总回磷中占主导地位,采取使用低磷合金及减小下渣量能有效减少总回磷量。转炉终点温度控制在1 620℃左右,终渣FeO含量达到15%以上,可降低转炉出钢下渣引起的回磷。精炼过程中合理控制炉渣碱度,控制前期精炼渣FeO含量在0.25%~0.45%,可以有效抑制钢液回磷。Abstract: Based on field experiments,the amount of rephosphorization quantity,the P content of alloy and auxiliary materials and the quantity of tapping slag were calculated in order to effectively control liquid steel rephosphorization.The effects of slag composition and temperature on the rephosphorization were also analyzed in the paper.The results show that the rephosphorization caused by alloy addition and tap-ping slag were the dominant roles contributing to the total rephosphorization quantity.Adding alloy with low P content and decreasing the tapping slag amount could effectively reduce the rephosophorization quantity.Controlling tapping temperature at~1620℃ and the content of FeO greater than 15% were necessary measurement in order to reduce rephosphorization.During secondary refining,controlling the slag basicity and the content FeO of refining slag ranging from 0.25% to 0.45%,liquid steel rephosphorization can be effectively controlled.
-
Key words:
- bearing steel /
- LF /
- secondary refining /
- tapping slag /
- rephosphorization
点击查看大图
计量
- 文章访问数: 17
- HTML全文浏览量: 5
- PDF下载量: 2
- 被引次数: 0