Supervisory control of reheating furnace

  • Kim, Young-Il (Research Institute of Industrial Science and Technology (Tel:+82-562-279-6615)) ;
  • Min, Kwang-Gi (Instrumentation and Control Dept., POSCO Automation Research Center and Dept. of Chemical Eng., POSTECH) ;
  • Nam, In-Sik (Instrumentation and Control Dept., POSCO Automation Research Center and Dept. of Chemical Eng., POSTECH) ;
  • Chang, Kun-Soo (Instrumentation and Control Dept., POSCO Automation Research Center and Dept. of Chemical Eng., POSTECH)
  • Published : 1995.10.01

Abstract

In steel works, reheating furnace is an essential part of a rod mill plant and it treats various types of billets continuously. Although getting an optimal setting for a single billet is simple, control setting for whole groups of billets is a difficult task. In this work, we studied a detail mathematical model and optimal control setting of reheating furnace. As the mathematical model of each billet is a partial differential equation, on-line control is almost impossible for the whole billets charged into the furnace. Therefore, we tried to provide a guideline for optimal setting value of the roof(index) temperature for the target billets which account for about 20% of the charged billets.