摘要:
结合攀钢实际情况,在生产低合金钢时,出钢过程向钢包内加入高碱度精炼渣,出钢后加入调渣剂,并在LF炉补加少量高碱度精炼渣和0.30~0.60 kg/t铝丸;以及将精炼后钢包底部软吹氩时间延长至6 min以上,改善了钢中夹杂的去除条件,大幅度提高了钢水质量,钢中T[O]平均为14.69×10-6,[S]平均为0.007%,[N]<50×10-6,非金属夹杂中B、C类夹杂较少,A、D类夹杂多为0.5级。
关键词:
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低合金钢 /
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精炼 /
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浇注 /
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精炼渣 /
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夹杂
Abstract:
In view of the actual situation of Panzhihua Iron & Steel(Group)company(PZHISC),in order to controlling compositions of ladle slag,a high basic refining slag was added to ladle during the steel being tapped,a modifier was added to ladle after the steel was tapped,also a small number of high basic refining slag and 0.30~0.60 kg aluminum pill per ton steel were supplemented in LF furnace.And the blowing argon time was extended by 6 min after LF refining.The removal conditions of inclusions were improved by these technical measures,the quality of molten steel of low carbon steels was improved substantially.The average total oxygen content is 14.69×10-6,the average sulphur content is 0.007%,[N]is less than 50×10-6,non-metallic inclusions of type-B and type-C are less than before,the vast majority of non-metallic inclusions of type- A and type-D both are 0.5 grade in the test slab of low alloy steel.