| 摘要 |
PURPOSE:To accurately respond to conditions of following hot air blowing to a blast furnace and perform an efficient burning control in the furnace by determining the feed rates of and feed ratio between fuel gas and burning air based on the predicted flame temperature so as to control the burning in the furnace. CONSTITUTION:The dome temperature in the ending stage of air blowing and hot air supply conditions to the blast furnace (blowing temperature, blowing rate, blowing time) up to the preceding operation are memorized in a CPU as process data. Meanwhile, the regression coefficient is determined by performing multiple-regression analysis. In the CPU by using certain flame temperature predicting formulae. Next, the target flame temperature for the following operation is predicted based upon hot air supply conditions to a blast furnace desired for the following operation and the dome temperature in the ending stage of the preceding operation. Further, the required quantity for the burning is computed from the burning time period of the furnace and the hot air supply conditions to the blast furnace, and the fuel gas quantity, burning air quantity and air/fuel ratio are determined from the target flame temperature and the required calorific value for the burning. These values are taken into account to make an overall judgment before the following burning. This way, the accuracy of prediction of the flame temperature can be improved. |
