Abstract: A melting furnace includes a melting portion to which a metal material is supplied; a burner for melting the metal material in the melting portion; a heating portion that receives the molten material from the melting portion; a temperature regulating portion that receives the molten material from the heating portion; a separator that separates the heating portion and the temperature regulating portion, wherein the lower portion of the separator is immersed in the molten material to form, below the separator, an inlet; an immersion heater wherein at least part of the immersion heater is immersed in the molten material in the temperature regulating portion; and a gas introduction path that is formed in the separator, and that introduces combustion gas from the burner into a space above the molten material in the temperature regulating portion; wherein the burner is controlled so that the combustion gas has an oxygen concentration of 5% or less.

Abstract: The present invention provides a melting furnace capable of suppressing oxidation of molten materials and improving the quality of the molten materials. As shown in FIG.

Abstract: A furnace as described in this invention comprises a temperature regulating portion to assist in melting a non-ferrous material, such as an aluminium, and to reserve said material for the subsequent casting or injection molding procedure. The furnace provides a mean to eliminate an oxide, such as iron oxide, which generally floats on the top layer of a molten material inside a melting portion and a heating portion by preventing the flow of said oxide into the temperature regulating portion. A sensor or any detector that can detect the level of the molten material is utilized to measure the surface level of said molten material. A temperature regulating burner, which is a flat flame type, is utilized on the ceiling of the temperature regulating portion in order to prevent any oxidation reaction to occur as well as to reduce the concentration of oxygen inside the portion.

Abstract: A furnace as described in this invention comprises a temperature regulating portion to assist in melting a non-ferrous material, such as an aluminium, and to reserve said material for the subsequent casting or injection molding procedure. The furnace provides a mean to eliminate an oxide, such as iron oxide, which generally floats on the top layer of a molten material inside a melting portion and a heating portion by preventing the flow of said oxide into the temperature regulating portion. A sensor or any detector that can detect the level of the molten material is utilized to measure the surface level of said molten material. A temperature regulating burner, which is a flat flame type, is utilized on the ceiling of the temperature regulating portion in order to prevent any oxidation reaction to occur as well as to reduce the concentration of oxygen inside the portion.

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: The invention provides a vessel for molten metal comprising a vessel body formed of an alumina-silica-based material, and a protective layer formed of a silicon nitride- alumina-based material provided on the inner surface of the vessel body, wherein the material for the vessel body is adjusted to have an alumina content x of 72 to 95 parts by weight per 100 total parts by weight of alumina and silica, and the material for the protective layer is adjusted to have a silicon nitride content y per 100 total parts by weight of silicon nitride and alumina in such a manner that y applies to the following formulae: (1) y<?1.1x+128 and (2) y>?0.5x+62.5. The present invention provides a vessel for molten metal having excellent durability and corrosion resistance against hot molten metal.

Abstract: The molten metal-transferring ladle including a ladle body having a storage space for melted metal, and an opening on the top; a large lid having an inlet in the middle, and covering an upper opening of the ladle body; an openable small lid covering the inlet; a tapping portion communicating the interior with the exterior of the storage space; and a pressurizing gas supplying means supplying a pressurizing gas to the storage space; the large lid having a supplying means installing hole communicating the interior with the exterior of the storage space; and the pressurizing gas supplying means being detachably mounted to the supplying means installing hole.

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 invention provides a vessel for molten metal comprising a vessel body formed of an alumina-silica-based material, and a protective layer formed of a silicon nitride-alumina-based material provided on the inner surface of the vessel body, wherein the material for the vessel body is adjusted to have an alumina content x of 72 to 95 parts by weight per 100 total parts by weight of alumina and silica, and the material for the protective layer is adjusted to have a silicon nitride content y per 100 total parts by weight of silicon nitride and alumina in such a manner that y applies to the following formulae (1) and (2): y<?1.1x+128 ??(1) y>?0.5x+62.5 ??(2). The present invention provides a vessel for molten metal having excellent durability and corrosion resistance against hot molten metal.

Abstract: An electric conduction heating device having an electrically conductive container (20), an upper electrode (16) and a lower electrode (12), wherein material accommodated in the container (20) can be heated by supplying electric current to the container (20) while the upper portion and bottom portion of the container (20) are sandwiched by the upper electrode (16) and the lower electrode (12); the container (20) being provided with a lower barrel (20a) and an upper barrel (20b) whose electrical resistivity is lower than that of the lower barrel (20a). This electric conduction heating device can efficiently heat the material accommodated therein.

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).

Abstract: To provide a pressure-tapping type molten metal-transferring ladle that is safe and has excellent workability, and is capable of reliably introducing a pressurizing gas. The molten metal-transferring ladle including a ladle body having a storage space for melted metal, and an opening on the top; a large lid having an inlet in the middle, and covering an upper opening of the ladle body; an openable small lid covering the inlet; a tapping portion communicating the interior with the exterior of the storage space; and a pressuring gas supplying means supplying a pressurizing gas to the storage space; the large lid having a supplying means installing hole communicating the interior with the exterior of the storage space; and the pressuring gas supplying means being detachably mounted to the supplying means installing hole.

Abstract: An object of the present invention is to provide a molten metal ladle in which scales, slag, etc., that adhere to the lining surface can be removed easily and reliably. The present invention provides a molten metal ladle provided with a bottomed tubular ladle body having an opening on the top, wherein the ladle body (10) has an upper ladle portion (12) and a lower ladle portion (11); the upper ladle portion (12) being connected to the top end of the lower ladle portion (11); lining layers (17,18) being provided inside the upper ladle portion (12) and lower ladle portion (11); and the innermost surface of the lining layer (18) of the upper ladle portion (12) being formed as an inclined plane wherein the opening area decreases from the top of the lining layer (17) of the lower ladle portion (11) toward the edge of the opening (13).

Abstract: The present invention provides a molten metal transporting container having a long-reach-pouring spout connected to a pouring outlet of a pouring spout, and projects toward the outside of the container body, the molten metal transporting container further having a spout operating member for separating the long-reach-pouring spout from the pouring spout by raising the long-reach-pouring spout while it is projected from the container body, and a spout drawing member for drawing the long-reach-pouring spout that was separated from the pouring spout toward the container body.

Abstract: The present invention provides a molten metal transporting container having a long-reach-pouring spout connected to a pouring outlet of a pouring spout, and projects toward the outside of the container body, the molten metal transporting container further having a spout operating member for separating the long-reach-pouring spout from the pouring spout by raising the long-reach-pouring spout while it is projected from the container body, and a spout drawing member for drawing the long-reach-pouring spout that was separated from the pouring spout toward the container body.

Abstract: A pressure tapping type ladle for transferring molten-metal includes a ladle body for containing molten metal, a top cover covering a top opening of the ladle body, and an openable working cover covering an opening formed in a part of the top cover. The ladle also includes a molten-metal tapping portion extending from a lower portion of the ladle body to above the ladle body, wherein the working cover is equipped with a cover body covering the opening of the top cover, a gas inlet formed in a top panel of the cover body, and a heat-resistant layer provided inside the cover body. The heat-resistant layer is comprised of a gas-permeable fireproof material layer, and gas for pressurizing inside the ladle body is introduced from the gas inlet via the gas-permeable fireproof layer.

Abstract: The present invention provides a molten metal transporting container having a long-reach-pouring spout connected to a pouring outlet of a pouring spout, and projects toward the outside of the container body, the molten metal transporting container further having a spout operating member for separating the long-reach-pouring spout from the pouring spout by raising the long-reach-pouring spout while it is projected from the container body, and a spout drawing member for drawing the long-reach-pouring spout that was separated from the pouring spout toward the container body.

Abstract: A pressure tapping type ladle for transferring molten-metal includes a ladle body for containing molten metal, a top cover covering a top opening of the ladle body, and an openable working cover covering an opening formed in a part of the top cover. The ladle also includes a molten-metal tapping portion extending from a lower portion of the ladle body to above the ladle body, wherein the working cover is equipped with a cover body covering the opening of the top cover, a gas inlet formed in a top panel of the cover body, and a heat-resistant layer provided inside the cover body. The heat-resistant layer is comprised of a gas-permeable fireproof material layer, and gas for pressurizing inside the ladle body is introduced from the gas inlet via the gas-permeable fireproof layer.

Abstract: A furnace for melting and holding aluminum materials, the furnace being characterized in that the furnace comprises: a pre-heating tower for pre-heating aluminum blocks, a melting crucible furnace which receives a supply of aluminum blocks from the pre-heating tower at a position immediately under the pre-heating tower, and a holding crucible furnace which receives a continuous supply of molten aluminum from the melting crucible furnace at a position side-by-side with the melting crucible furnace, and that an exhaust gas resulting from combustion in the melting crucible furnace can be supplied to the inside of the pre-heating tower as an ascending current for heat exchange with aluminum blocks, the furnace being capable of continuous melting and energy savings.