Patent Document ID: 4657507
Application ID: 06833023
Patent Flag: 1

Claim One:
1. Heating control method of a heat furnace, wherein a continuous heat furnace has a plurality of heating control regions, said heating control method comprising: (a) first step of calculating time variation of furnace temperature based on fuel flow rate by unsteady heat balance system; (b) second step of calculating time variation of inner temperature of a furnace wall from the furnace temperature; (c) third step of calculating time variation of inner temperature of material from the furnace temperature; (d) fourth step of calculating mean temperature of each control region at material extraction state in the existing flow rate, heat uniformity thereof, and each furnace temperature at material passing state, using the calculation values obtained from said first, second and third steps; (e) fifth step of calculating mean temperature of each control region at material extraction state when the fuel flow rate is varied from the existing flow rate by a definite value, heat uniformity thereof, and each furnace temperature of material passing state, using the calculation value obtained from said first, second and third steps; and (f) sixth step of calculating linearization coefficient in the existing flow rate based on the calculation values obtained from said fourth and fifth steps, and determining the optimum furnace temperature per material to minimize the fuel under restricting conditions using the linearization coefficient to control the heating regions of said heat furnace.