Abstract: The present invention provides a valuable metal recovery apparatus capable of discharging clean exhaust gas. The apparatus 1 includes a furnace body 2; a heating container 3; a first combustion burner 10 for supplying heated gas into the furnace body 2; a tower 4 projecting upward from the furnace body 2; a gas combustion chamber 5 communicating with the tower 4 and being used for receiving unburned gas generated upon heating of a material to be treated; a second combustion burner 11 for supplying heated gas into the gas combustion chamber 5; a gas introducing passage 7 for introducing combustion gas generated in the gas combustion chamber 5 into the furnace body 2; a flue 21 for discharging the combustion gas in the furnace body 2 to the outside; and a support 8 supporting the furnace body 2 such that the furnace body 2 can be tilted.

Abstract: A crucible-type continuous melting furnace includes a preheating tower for storing the material to be melted, and an exhaust port on the top thereof; a melting crucible furnace disposed below the preheating tower and having a melting crucible to which the material to be melted is supplied from the preheating tower; a heating burner for heating the melting crucible; and a preheating burner for preheating the material to be melted and disposed in a position that is higher than the heating burner; the melting crucible furnace having an introduction portion for introducing a combustion gas from the heating burner into the preheating tower; and the melting crucible having a molten metal outlet on the side wall for discharging the molten metal obtained by melting the material.

Abstract: The present invention provides a crucible-type continuous melting furnace by which the melted amount of the material can be readily controlled. A crucible-type continuous melting furnace 1 includes a preheating tower 31 for storing the material to be melted (a), and an exhaust port 34 on the top thereof; a melting crucible furnace 11 disposed below the preheating tower 31 and having a melting crucible 71 to which the material to be melted (a) is supplied from the preheating tower 31; a heating burner 3 for heating the melting crucible 71; and a preheating burner 4 for preheating the material to be melted and disposed in a position that is higher than the heating burner 3; the melting crucible furnace 11 having an introduction portion for introducing a combustion gas from the heating burner 3 into the preheating tower 31; and the melting crucible 71 having a molten metal outlet 74 on the side wall for discharging the molten metal (b) obtained by melting the material (a).