高炉渣铁排放在线监测系统的开发与应用

 要实现渣铁流量的检测，必须分别对渣铁流速、流股直径变化和铁水罐增重速率3个参数进行监测，由于高温液态渣铁理化特性，对其直接准确测量是非常困难的，经过研究和生产现场实地考察，提出一种非接触式测量渣铁流量的方法。依据多普勒效应在线测量首钢京唐5 500 m3高炉出铁时渣铁排放的速率，并同步视屏摄像仪监测铁口截面，利用图像处理技术，实时观测记录铁口直径的变化，结合铁水罐称重系统中的铁水增重速率，分析计算高炉出渣出铁速率及高炉渣比，对比实际理论值验证了监测系统的可靠性。

Development and application about on-line monitoring system of hot metal drainage of blast furnace

To achieve the detection of the hot metal and slag flow，three parameters must be detected which includes the metal flow velocity， the tap hole diameter and the mass increase rate of the hot metal ladle. According to physicochemical property of the high temperature liquid metal and slag， it is difficult to achieve accurate direct measurement. A non-contact measuring method for hot metal and slag flow is proposed after research and field trip. Based on the Doppler effect， the metal and slag drainage rate of Shougang Jingtang 5 500 m3 blast furnace was measured on-line，and at the same time video camera monitors the section of tapping hole， and the change of tap hole diameter was recorded and observed in real time. Combining the mass increase rate of hot metal in the weighing system of iron ladle， analyzing and calculating the metal and slag drainage rate and slag ratio of blast furnace， verifying the reliability of detection system in contrast with the actual theoretical value.