MEASURING METHOD FOR FLOW RATE OF EXHAUST GAS FROM TOPP BLOWN CONVERTER BY ANALYZING THE SAME

摘要

PURPOSE:To measure the exhaust gas flow rate with high accuracy by analyzing the tracer gas concentration in the exhaust gas led to an analyzer, together with the CO and CO2 concentrations and calculating the exhaust gas flow rate according to the analyzed value of the tracer gas concentration. CONSTITUTION:When the blowing end point of a top-blown converter 1 is dynamically controlled, Ar gas is used as a tracer gas during the blowing period of supplying O2 for blowing, and a given amount of said tracer gas is blown in from spouting pipes 3 provided below the surface of the bath 2 in the converter 1. From the gas intake 9 provided in the exhaust gas duct 6 rising from the throat of the converter 1, the exhaust gas is led to an analyzer 7 to analyze the Ar concentration together with the CO and CO2 concentrations. At the same time, the exhaust gas flow rate is calculated according to the analyzed value of the Ar concentration.