LF喂铝线过程参数优化

Parameter optimization of aluminum wire feeding process during LF refining

在铝镇静钢LF精炼过程中,准确控制钢水中的酸溶铝含量及氧含量,同时减少铝线消耗对钢铁企业有重要的经济价值.本文建立了LF喂线过程中,铝线在钢液中熔化的一维传热数学模型,并利用文献中的实验结果验证了模型的准确性.利用该模型分析了喂线速度、铝线直径以及钢液过热度对铝线熔化过程的影响.计算结果表明,喂线速度和钢液过热度对铝线喂入深度影响较大,在高过热度时应选用较粗的铝线以较低的喂线速度进行喂线.

In LF refining process of Al-killed steel,the accurate control of acid-dissolved aluminum content and oxygen content and the less consumption of aluminum wire provide substantial economic value to steel plants. A one-dimensional heat transfer mathematical model was proposed to describe the melting behavior of aluminum wire injected into molten steel during LF refining process.The model was validated by experimental results from previous literatures. The effects of wire speed,wire diameter and bath superheat on the melting of aluminum wire were investigated by using the model. It is found that wire speed and bath superheat seem to be the most important factors affecting the travelled distance of aluminum wire. In addition,large wire diameter and small wire speed are recommended under high bath superheat.