氧气转炉吹炼前期的最佳化脱磷工艺基础

通过对上钢五厂15t氧气顶吹转炉试验数据的多元逐步回归分析，进行了脱磷最佳化工艺探讨，提出了分阶段的（MgO），（ZFeO）最佳控制值及Lp，np和（TFe）控制模型，以求“一倒”或终点时Lp接近最大值和np≈1．0强化前期脱磷的技术关键是：采用大氧压、高枪位和添加适量助熔剂，以造好R＝1．6～2．0的初渣和达到［P］t＝7min＝0．05～0．07wt％的目标值．并籍助LP.b控制模型计论了达此［P］值的措施．

A MODEL OF OPTIMIZED DEPHOSPHORIZATION IN THE PRIMARY BLOWING PERIOD FOR TOP-BLOWN OXYGEN CONVERTER

Based on the multiple progressive regression analysis of the test data on a 15 ton top-blown oxygen converter at Shanghai No.5 Works, optimization of the dephosphorization process was explored. The optimal control value of (MgO) and (FeO) and the models of Lp, np and (TFe) were suggested to ensure Lp.1 or Lp.F approaching the maximum and np.1 or np.F approaching unity. The key techniques for strengthening dephosphorization in the primary blowing period include adopting high oxygen pressuret increasing lance height and adding appropriate flux, so that slag with Rb=1.6~2.0 and P](t=7min)=0.05~0.07% may be obtained.The technical measures to obtain the slag with desired P](t=7min) is also discussed in terms of the Lp.b control model.