Mathematical model building and optimization control of horizontal continuous heat treatment furnace

According to the large continuous annealing furnace widely used to produce ductile iron pipes in metallurgy area, heat transfer mathematical model was built in the paper. Based on the pipe setting temperature curve and boundary conditions, temperature distribution in the furnace is deduced by solving heat transfer differential equation. The aim is to optimize the control temperature curve. In order to make the temperature uniform in the furnace, the pulse combustion control program is developed. The actual application shows that the product quality is enhanced in a large scale with the optimization curve. The maneuverability is good. The whole system meets the process requirements perfectly. It also proves the truth and practicability of the model algorithm.