Abstract: Furnace pressure is an important control index of annealing furnace. Furnace pressure fluctuation will have a significant impact on the quality and performance of products. The pressure control of the existing continuous annealing furnace generally adopted a conventional PID control method, which caused the traditional continuous annealing furnace pressure could not take into account the requirements of stability and rapidity at the same time. A new control method of furnace pressure control model was adopted, which took the set value and actual value of furnace temperature, burner power, gas and air flow in the furnace area as the input, and used the multivariable predictive control algorithm to calculate the current optimal exhaust fan speed, so as to realize the control of furnace pressure stably and improve the control accurately.

Key words: furnace pressure, data model, annealing furnace