Distributed Control System for Coil Annealing Furnace

Abstract

New DDC system for batch-type coil annealing furnace was developed at Kashima cold strip mill. The purposes of the system are;
1) Improvement of fuel consumption by combustion control
2) Improvement of operations by full use of CRT display and printer
3) Improvement of reliability and maintenance by the introduction of distributed control system.
The characteristic of new combustion control is to lower the set-point of the furnace temperature as low as possible, keeping the heating rate of the coil similar to that of conventional combustion control. This system was achieved by adoption of a distributed micro-computer control system.