The present application relates to a bath transfer system with a vessel for receiving molten metal, a duct for conveying the molten metal from the vessel through the duct, a vessel cover for air-tightly sealing a vessel interior, and a tilting mechanism for tilting the vessel. The tilting mechanism includes at least one pedestal that is hingedly connected to the vessel, and a blocking device on the vessel for blocking the pedestal in a functional position, the pedestal being movable from a rest position into the functional position in which the pedestal extends beyond a bottom of the vessel.

The present application relates to a bath transfer system with a vessel for receiving molten metal, a duct for conveying the molten metal from the vessel through the duct, a vessel cover for air-tightly sealing a vessel interior, and a tilting mechanism for tilting the vessel. The tilting mechanism includes at least one pedestal that is hingedly connected to the vessel, and a blocking device on the vessel for blocking the pedestal in a functional position, the pedestal being movable from a rest position into the functional position in which the pedestal extends beyond a bottom of the vessel.

An object of the present invention is to provide an oxygen enriched burner which can uniformly heat with excellent heat transfer efficiency even at a position away from the burner, when heating an object to be heated by a self-oscillating flame, and a method for heating using an oxygen enriched burner, and the present invention provides an oxygen enriched burner including a central fluid discharge outlet and a pair of first peripheral fluid discharge outlet and a pair of second peripheral fluid discharge outlets, which are arranged opposite to each other around the central fluid outlet, a pair of openings are provided in side walls of a fluid ejection flow path on the upstream side of the central fluid discharge outlet, the distance between a pair of side walls gradually expands toward the downstream side, a pair of the second peripheral fluid outlet are arranged so as to be orthogonal to the direction facing the openings and sandwich the central fluid outlet therebetween, an angle y formed by the central axis of the central fluid outlet and the central axis of the second peripheral fluid outlets satisfy a predetermined relationship, an outlet width between the side walls of the central fluid outlet, and an outlet width of the second peripheral fluid outlets in a direction along the outlet width satisfy a predetermined relationship.

A method for producing a metal ingot by using an electron-beam melting furnace including an electron gun capable of controlling a radiation position of an electron beam, and a hearth that accumulates a molten metal of a metal raw material, in which, in a downstream region between an upstream region in which the metal raw material is supplied onto the surface of the molten metal and a first side wall, an irradiation line is disposed so as to block a lip portion and so that two end portions are positioned in the vicinity of the side wall of the hearth. A first electron beam is radiated onto the surface of the molten metal along the irradiation line, and the first electron beam is radiated along the irradiation line. By this means, the surface temperature (T2) of the molten metal along the irradiation line is made higher than the average surface temperature (T0) of the entire surface of the molten metal in the hearth, and a molten metal flow from the irradiation line toward upstream that is a direction toward the opposite side to the first side wall is formed in an outer layer of the molten metal.

[Problem]

To provide a method for producing a metal ingot, which makes it possible to inhibit impurities contained in molten metal in a hearth from being mixed into the ingot.

[Solution]

A method for producing a metal ingot by using an electron-beam melting furnace having an electron gun and a hearth that accumulates a molten metal of a metal raw material, wherein the metal raw material is supplied to the position on a supply line disposed along a second side wall of the hearth that accumulates the molten metal of the metal raw material. A first electron beam is radiated along a first irradiation line that is disposed along the supply line and is closer to a central part of the hearth relative to the supply line on the surface of the molten metal. By this means, a surface temperature (T2) of the molten metal at the first irradiation line is made higher than an average surface temperature (T0) of the entire surface of the molten metal in the hearth, and in an outer layer of the molten metal, a first molten metal flow is formed from the first irradiation line toward the supply line.

There is provided a melting device including a melting cylinder that is heated to a predetermined temperature, melts a molding material supplied from a material supply port, and generates a molten material; an inert gas supply device configured to supply an inert gas onto a melting surface of the molten material and form an inert gas layer; and a low specific gravity gas supply device configured to supply a low specific gravity gas which is a gas having a different type from the inert gas and form a low specific gravity gas layer on the inert gas layer, wherein the low specific gravity gas layer has a lower specific gravity than the inert gas layer.

There is provided a melting device including a melting cylinder that is heated to a predetermined temperature, melts a molding material supplied from a material supply port, and generates a molten material; an inert gas supply device configured to supply an inert gas onto a melting surface of the molten material and form an inert gas layer; and a low specific gravity gas supply device configured to supply a low specific gravity gas which is a gas having a different type from the inert gas and form a low specific gravity gas layer on the inert gas layer, wherein the low specific gravity gas layer has a lower specific gravity than the inert gas layer.

A die casting furnace system includes a die casting holding furnace unit defining a cavity for holding a molten metal. A dosing unit is disposed within the cavity and defines a dosing area disposed in fluid communication with the cavity for receiving the molten material during a pressurization of the cavity. The cavity of said die casting holding furnace unit has a first storage capacity and the dosing area of said dosing unit has a second storage capacity being less than the first storage capacity. An ultrasonic unit is operably coupled with the finitely sized dosing area and is configured to introduce vibration into the received molten material for facilitating the removal of gases from the received molten material. The treatment of the finitely sized dosing area with the ultrasonic unit leads to improved metal cleanliness and accuracy that is not achievable with prior art systems.

A die casting furnace system includes a die casting holding furnace unit defining a cavity for holding a molten metal. A dosing unit is disposed within the cavity and defines a dosing area disposed in fluid communication with the cavity for receiving the molten material during a pressurization of the cavity. The cavity of said die casting holding furnace unit has a first storage capacity and the dosing area of said dosing unit has a second storage capacity being less than the first storage capacity. An ultrasonic unit is operably coupled with the finitely sized dosing area and is configured to introduce vibration into the received molten material for facilitating the removal of gases from the received molten material. The treatment of the finitely sized dosing area with the ultrasonic unit leads to improved metal cleanliness and accuracy that is not achievable with prior art systems.

A vacuum smelting device with mold-temperature control design includes: a chamber body and a cabin door, wherein the chamber body and the cabin door form a vacuum closed space; a smelting crucible disposed in the vacuum closed space for smelting raw materials to a molten metal; a casting mold also disposed in the vacuum closed space for accommodating the molten metal poured from the smelting crucible, and solidifying the molten metal to an as-cast alloy; and a mold-temperature control module surrounding the casting mold for controlling the temperature of the casting mold.