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本文介绍氧气顶吹转炉试炼20管坯钢,由于原材料条件差,铁水 S、P 含量高,单靠高拉碳操作,20管坯钢的炼成率仅30%左右,在钢包加少量生铁增碳,可提高炼成率。同时采用包内加 Si-Ca 复合脱氧剂及吹 Ar 处理等措施,20管坯钢内在质量大大提高。氧化物夹杂比电炉冶炼的20管坯钢还要低,硫化物夹杂两种冶炼方法相近。成品钢管经工艺性能试验都超过了标准要求,检验全部合格,已转入正式生产。
This paper describes the oxygen top-blown converter trial 20 billet steel, due to poor raw material conditions, high content of molten iron S, P alone high carbon pulling operation, 20 billet steel refining rate of only about 30% in the ladle with a small amount of pig iron Carbon, can improve the refining rate. At the same time using package Si-Ca composite deoxidizer and blowing Ar treatment and other measures, 20 billet internal quality greatly improved. Oxide inclusions than the 20 smelting furnace steel is even lower, sulfide inclusions two smelting methods similar. Finished steel pipe by the process performance tests have exceeded the standard requirements of all qualified test, has been transferred to the official production.