阈值设定法对钢包眼面积的快速影像分析

Rapid image analysis of ladle eye area by threshold setting method

在钢的二次精炼过程中,通过惰性气体(Ar)底吹法搅拌钢包里的钢水是一种常规手段,其目的是确保钢液的均匀性,并促进炉渣和金属相之间的化学反应。钢包眼区(Ladle eye)的面积大小对于空气(O2,N2)的吸收,以及钢渣的形成有着重要的影响,而钢渣的成分及形态决定了钢液及产品的质量。对钢包眼区域的在线分析有助于帮助操作工人掌握添加各种造渣剂的种类和数量以及对通气量(压力或流量)的控制。实验阐述了一种基于钢包顶部数码影像的快速分析技术,通过冷态模型实验和工业钢炉的实际测试,有效地计算出钢包眼区的面积,且计算速度快于0.1s/frame,能够基本满足实时测量的要求。

In the secondary refining process of steel,inert gas(Ar)sub-aeration method is a conventional method to stir the molten steel in ladle,which aimed to ensure the homogeneity of molten steel and accelerate the reaction between slag and metal phase.The area of ladle eye has significant effect on the absorption of air(O2,N2)and the formation of slag,while the component and morphology of slag determines the quality of molten steel and its products.On-line analysis of ladle eye could help the operators master the variety and amount of slag constituent and control the ventilatory amount(pressure or flow rate).This paper gave an illustration on rapid analysis technology based on top digital image of ladle.Through cold model experiment and practical test of industrial steel furnace,this technique could effectively work out the area of ladle eye at an speed faster than 0.1s/frame.It could basically satisfy the demand of real-time measurement.