CONTROLLING METHOD OF CNVERTER WASTE GAS

摘要

PURPOSE:To prevent blowing out of gas from a converter port owing to a sharp increase in the amt. of the gas generated during charging of an auxiliary raw material by controlling an R damper in accordance with the increased amt. of said gas and the predicted value of a delay in reaction time in the treatment of converter waste gas. CONSTITUTION:An increased amt. DELTAF of generated gas and a delay in reaction time T1 are actually measured for each charging degree V(T/H) of the auxiliary raw material to be charged during refining, and the respective relations are obtd. as shown in the figure. Prescribed equations are obtd. with DELTAF, T1 and reaction time T2 from said relations and it is predicted by using these equations that the sharp increase in the generated gas begins after T1 time since the auxiliary raw material is charged and that the gas of DELTAF increases after T2 time. The DELTAF is converted to the opening of the R damper to be increased and the R damper is controlled according to the flow rate of the waste gas-the opening of the R damper characteristic. The automatic control of the R damper with good follow-up is thus made possible with a sharp increase in the amt. of the gas produced when the auxiliary raw material is charged.