Simulation Research on Bottom Blowing System of 65 t Ladle Based on Fulent Software
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摘要: 以某厂65 t钢包实际生产工艺为研究基础,采用Fluent软件模拟分析了不同底吹结构及工艺参数对钢包卷渣、钢液湍动能及钢包壁面侵蚀率的影响规律。研究结果表明:吹氩量100 L/min为临界卷渣吹氩量,此时渣-金界面钢液速度为0.15~0.20 m/s,小于临界卷渣速度0.229 m/s,不易发生卷渣。底吹夹角180°、底吹中心矩0.6R时钢包内钢液的湍动能分布最合理。数值模拟确定的混匀时间与冷态模拟试验结果基本一致,误差均值在5%以内,证实了数学模拟结果的可靠性。Abstract: According to the practical conditions of 65 t ladle,the effects of bottom blowing design and process parameters on slag entrapping,turbulent kinetic energy and lining Erosion of the ladle has been investigated by Fluent s of tware.Under the condition of 100 L/min bottom blowing,slag entrapping will not readily occur because the steel flow velocity on steel-slag interface ranges from 0.15~0.2 m/s,which is less than critical velocity 0.229 m/s at which slag entrapping can happen.The distribution of turbulent kinetic energy is reasonable when the intersection angle and the center distance of bottom blowing were 180° and 0.6R,respectively.Under this constructional condition,the predicted mixing time by Fluent soft-ware is good agreement with that of the cold model experiment.The standard error is within 5%,showing the good reliability of the numerical simulation.
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Key words:
- ladle /
- bottom blowing /
- slag entrapping /
- numerical simulation /
- turbulent kinetic energy /
- lining erosion
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