To provide a furnace capable of performing dry distillation reduction firing by combustion heat source for an electric furnace.

The electric furnace is expensive, though it is convenient as its set temperature can be arbitrarily selected. As an improved gun type burner of oil of a new mechanism capable of coping with requirement of new facilities for the electric furnace, is achieved, this dry distillation reducing sintering furnace incorporating a dry distillation chamber furnace comprising a furnace wall as shown in a drawing, can be provided at low costs to be utilized in various purposes.