摘要:
基于某钢厂提钒转炉研究半钢炉外脱磷工艺,旨在不影响生产进度的情况下增加脱磷工序,从而减轻转炉脱磷压力,降低终点磷含量,以达到超低磷钢的生产水平。通过实验室研究得到了提钒后的半钢在实验室管式炉中脱磷时所需的合适温度、反应时间以及脱磷剂加入量,以此为基础对CaO-Fe2O3-CaF2系、CaO-Fe2O3-CaF2-Al2O3系、Na2CO3-CaO-Fe2O3-CaF2系和BaO-CaO-Fe2O3-CaF2系脱磷剂的配比进行研究,找出各系脱磷剂的最佳配比,最后,设计出现场提钒后的半钢炉外脱磷工艺操作,并进行现场试验验证,这为生产实践提供了一定的参考价值。
关键词:
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提钒转炉 /
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半钢 /
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炉外脱磷 /
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脱磷剂
Abstract:
Based on a vanadium extraction converter,the semi-steel secondary dephosphorization process had been investigated,in order to improve the dephosphorization process without affecting the production schedule,thus reducing the dephosphorization pressure of the converter and decreasing the phosphorus content at the end point so as to produce the ultra-low phosphorus level in steel.The appropriate temperature,the reaction time and the addition of dephosphorizing agent which are used when the vanadium-extracted semi-steel is dephosphorized in the laboratory tube furnace are obtained by laboratory study.Based on these findings,CaO-Fe2O3-CaF2 series,CaO-Fe2O3-CaF2-Al2O3 series,Na2CO3-CaO-Fe2O3-CaF2 series and BaO-CaO-Fe2O3-CaF2 series dephosphorization agents are studied to find out their best matching ratio.Then the dephosphsrization process of vanadium-extracted semi-steel outside the furnace has been designed and validated by field test.