Control Model of Hot Metal Temperature in the Blast Furnace and its Application to Re-Start Operation Planning

Abstract

This paper studies the control model of hot metal temperature (HMT) in the blast furnace, from the view point of control theory, and clarifies that
(1) HMT can be stabilized using the feedback of the HMT at the lower area of blast furnace, when it can be measured,
(2) the estimation model of HMT at the lower area of blast furnace should be developed and be included in the control system, when it can't be measured, and
(3) the model should estimate not only the dynamics of HMT change against actions like blast temperature change but also that of the HMT change caused by disturbance factor.
Furthermore, the clarified properties are applied to blow-in operation planning and contribute to the short term planning.