摘要:
结合南钢现场试验,研究了转炉采用单渣法和双渣法对钢水脱磷的影响;分析比较了不同操作制度对钢液中磷含量的影响,辅料加入量对终点钢液磷含量变化的影响,留渣操作对前期渣的影响以及对冶炼终点钢液磷含量的影响。试验结果表明,与单渣法相比,双渣法前期脱磷效果较好,形成的前期渣对脱磷较有利,冶炼终点能很好达到低磷钢要求。同时通过现场试验研究确定了冶炼低磷钢的最佳终点温度、适宜碱度和FeO含量等条件,并得出对磷含量要求严格的钢种应采用双渣法冶炼较有利。
关键词:
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单渣法 /
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双渣法 /
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脱磷 /
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转炉冶炼
Abstract:
Based on industrial tests in Nan Steel,experiments were carried out to study the effect of single and double slag processes on dephosphorization of molten steel,the effect of different operating system on phosphorus content in molten steel,the effect of adding amount of auxiliary materials on phosphorus content in molten steel at the end point of smelting,and the effect of retained slag process on preliminary slag and phosphorus content in molten steel at the end point of smelting.The experimental results show that compared with the single slag process,the double slag process show better performance on dephosphorization in the preliminary stage,and it can fully meet the requirements of low phosphorus steel at the end point of smelting.In addition,the optimum smelting temperature,alkalinity,and FeO percentage etc.for low phosphorus steel smelting were determined in field tests.It can be concluded that it is better to smelt the steel which has strict requirements on phosphorus content with the double slag process.
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