ELECTRIFIED HEATING METHOD FOR REFRACTORY

摘要

PURPOSE:To maintain the plural bodies to be heated within the specified temp. range by a single power source panel by feeding the electric power fed from the power source panel to the body to be heated of a low temp. with switching it according to the temp. of the body to be heated. CONSTITUTION:A large current power source panel 1 is connected to an output switching circuit 3 via a power control circuit 2. The lead wire for electrified heating is then connected by branching to plural bodies 4 to be heated from said circuit 3. A temp. detection end 5 is provided on the respective body 4 to be heated and the detection value detected 5 is inputted to a convertor 6. Namely which body 4 to be heated is to be subjected to electrified heating is judged by the circuit 2 according to the temp. of the detected 5 body 4 to be heated and a specified signal is outputted to the circuit 3. Based on this control signal the electrifying object is changed over to another body 4 to be heated whose temp. drops from the body 4 to be heated attaining a high temp. by the electrified heating. All of the body 4 to be heated can always be held at more than specified temp. by using one unit of power source panel 1 by continuously performing this changeover.