PURPOSE: To melt a material efficiently by a method wherein electrodes are passed through a ceiling wall descended and suspended down into a main body of a furnace, an upper part of the main body of the furnace is provided with an air blowing port to supply combustion air and an upper space within the main body of the furnace is applied as an igniting space for not-yet ignited substances generated during melting operation.
CONSTITUTION: Dusts fed into a main body of a furnace or substances 6 to be melted such as flying ashes are dropped onto a melting layer 7 kept at a high temperature with a Jule heat, they are heated to about 1400°C with combustion heat of ignitable gas or heat of the melting layer 7 and they are melted in sequence. The melting layer 7 within the main body of the furnace is adjusted and controlled in its height level in such a manner that the upper space 9 of the main body of the furnace may keep a spacing volume required for combustion of ignitable gas. The ignitable gas generated during melting operation is mixed with combustion air at the upper space of the main body of the furnace i.e., the combustion chamber which is kept at a high temperature state with radiation heat obtained from the melting layer 7 and then they are completely ignited.
ASO TOMONOBU
SAMEJIMA RYOJI
