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在济钢条件下,采用常规的铁水脱硫加转炉双渣的冶炼工艺生产低磷钢,很难将成品w(P)稳定控制在0.010%以下。基于转炉双渣大渣量生产试验,采用回归分析研究了影响冶炼过程脱磷效率的主要因素,确定了最佳的双渣吹炼时间、过程温度和炉渣成分控制,大幅度提高了冶炼过程的脱磷效率。该工艺在9Ni、高级别管线(X90/X100)的生产中得到广泛应用,成品w(P)稳定控制在0.006%以下,最低达到了0.004%,实现了低磷钢的批量生产。
Under the conditions of Jinan Iron and Steel, the use of conventional hot metal desulphurization converter slag double smelting process to produce low-phosphorus steel, it is difficult to control the finished product w (P) stable below 0.010%. Based on the trial production of double slag and large slag in converter, the main factors influencing the dephosphorization efficiency in smelting process were studied by regression analysis, and the best double-slag blowing time, process temperature and slag composition control were determined and the smelting process Dephosphorization efficiency. The process is widely used in the production of 9Ni, high-grade pipelines (X90 / X100). The finished product w (P) is stable controlled at 0.006% or less, the lowest reached 0.004%, which realizes the mass production of low phosphorus steel.