PURPOSE: To improve preheating efficiency of scrap within a transfer device by providing a scrap feeding part at a plurality of places in a transfer direction of a scrap transfer device.

CONSTITUTION: High temperature exhaust gas produced on a furnace 1 during melting and refining of scrap passes through an extensible connection pipe to be led into a transfer device 7, and after preheating surface layers 20a to 20d of the scrap 8 on a trough 10 by heat transmission in the form of heat radiation and convection is sucked into a dust collector through an exhaust gas suction duct 12 which is provided at a rear end of a water cooling cover 9. On the other hand, the scrap 8 is first supplied to receiving hoppers 13 and 16a to 16c by means of a crane with a lifting magnet. Thus, by supplying the scrap to a plurality of places of the transfer device, an area of a preheated surface layer can be increased and further a preheating efficiency can be improved.