Double Slag Operation Dephosphorization in BOF for Producing Low Phosphorus Steel
Double Slag Operation Dephosphorization in BOF for Producing Low Phosphorus Steel
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DOI：
10.1016/s1006-706x(09)60036-4
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发表时间：
2009-05-01
影响因子：
2.5
通讯作者：
Jiang Zhong-hang
中科院分区：
文献类型：
--
作者：
Tian Zhi-hong;Li Ben-hai;Jiang Zhong-hang
在210 t转炉上进行了双渣操作生产低磷钢的研究。出钢前磷含量低于0.005%（质量百分比）。第一渣在5min内可脱磷80%左右，第一渣中高Fe（3+）含量和高碱度有利于脱磷。而二次渣处理过程中Fe（3+）含量对脱磷效果的影响较小。在第二渣期，脱磷率随碱度的增加而增加，碱度为6时，脱磷率随碱度的增加而增加。进一步提高二渣碱度对脱磷效果影响不大。出钢温度对脱磷效果影响较大。当出钢温度高于1943K时，磷含量不可能低于0.005%。提出了最佳操作条件。基于这些条件，估计第二炉渣的量和残留的第一炉渣的效果。
A study on the production of low phosphorus steel by double slag operation in 210 t converter was carried out.. A phosphorus content of less than 0.005% ( mass percent) was obtained before tapping. A bout 80% phosphorus could be removed by the first slag after 5 min. High Fe(3+) content and high basicity in the first slag were in favor of dephosphorization. On the other hand, Fe(3+) content had less effect on dephosphorization during second slag treatment. In the second slag period, the fraction of dephosphorization increased with the increase of basicity up to a basicity of 6. Further increase of basicity of the second slag had very little effect on dephosphorization. The tapping temperature had great impact on dephosphorization. It was impossible to get phosphorus less that 0.005% when the tapping temperature was higher than 1 943 K. The optimum operation conditions were suggested. On the basis of these conditions, the amount of the second slag and the effect of the remaining first slag were estimated.