TH33076A - Continuous melting precursors for low melting point metals, improved crucibles for such finishers, and methods for melting using them. - Google Patents

Abstract

DC60 (07/07/41) unveils a continuous melting machine for low melting point metals. The machine consists of a main furnace section (5) made of a combustion chamber (6) enclosed by a refractory lining, a crucible (1) made with an outlet (2) at the appropriate position of the main section and positioned in the center of the combustion chamber, a furnace (8) positioned on the side walls of the main section of the furnace (5) for heating the crucible (1) in the combustion chamber (6), and receiving vessels (6, 13) for receiving the molten metal flowing out through the outlet (2) of the crucible (1). In this continuous melting machine, a furnace-heated melting method is achieved which is inexpensive, easy to handle and maintain, and achieves minimal oxidation loss, a drawback of conventional furnaces. In addition, the formation of corundum on the furnace wall surface due to the melting reaction between the aluminum and the furnace wall is avoided. The successful melting process reveals a continuous melting machine for low melting point metals. The machine consists of a main section of the furnace (5) made of a combustion chamber (6) enclosed by a refractory lining, a crucible (1) made with a pipe mouth (2) at the appropriate position of the main section and positioned in the center of the combustion chamber, a furnace (8) positioned on the side walls of the main section of the furnace (5) for heating the crucible (1) in the combustion chamber (6), and receiving vessels (6,13) for receiving the molten metal flowing out through the pipe mouth (2) of the crucible (1). In the continuous melting machine, a furnace-heated melting method is successfully achieved, which is inexpensive, easy to arrange and maintain, and has minimal oxidation losses, a drawback of this type of furnace. In addition, the formation of corundum on the surface of the furnace walls due to the melting reaction of aluminum and the melting chamber walls is successfully avoided.

Claims (16)

1. A complete continuous melting furnace for low melting point metals consists of: the main body of the furnace made up of an enclosed combustion chamber lined with refractory material; a crucible with an outlet at the appropriate position and positioned in the center of the combustion chamber; a furnace arranged on the side walls of the main body of the furnace to heat the crucible in the combustion chamber; and a receiving vessel to collect the molten metal flowing out through the outlet of the crucible. 2. A continuous melting machine as described in Claim 1, on which the Crucible base is placed on the floor of the said combustion chamber, and the said Crucible is attached to the said Crucible base. 3. A continuous melting vessel as described in Claim 2, whereby the floor of the combustion chamber serves as a primary receptacle for collecting molten metal flowing out through the outlet, and whereby this receptacle is connected to a second receptacle located outside the combustion chamber. 4. A continuous melting vessel as described in claim 3, which is supplied with a second receiving vessel and a heater attached for heating the molten metal received therein. 5. A continuous molten metal dispensing device as described in Requisition 1, which connects a rail on the outside of the mouth of the said Crucible and guides the molten metal flowing out through the mouth to the said receiving vessel located outside the combustion chamber via the said rail. 6. A continuous melting vessel as described in Claim 5, in which the receiving vessel consists of a main body of the supporting furnace which creates a heating chamber surrounded by a refractory lining, a supporting crucible placed in the center of such heating chamber, and heaters attached to the side walls of the main body of the supporting furnace to heat the supporting crucible. 7. A continuous melting machine as described in Claim 5, which is supplied with multiple receiving vessels and creates channels to distribute the molten metal flowing out through the outlet to the multiple receiving vessels in sequence. 8. A continuous melting machine as described in Claim 1, which provides a baffle of appropriate distance at the inlet of such pipe opening to prevent the metal rods from flowing out through such pipe opening of the said Crucible. 9. A continuous melting device as described in Claim 1, which is fitted with an open pipe that expands downward from the mouth of such pipe in the Crucible to prevent the metal rod from flowing out through the mouth of such pipe in the Crucible. 10. A continuous melting machine as described in Reputation 1, connected in an upward-facing rail on the outside of the mouth of the said Crucible to prevent the metal rods from flowing out through the mouth of the said Crucible. 11. A continuous melting device as described in Requisition 1, which creates a bar discharge window in the main section of the said crucible at different positions relative to the mouth, with a lower edge than the level at the level near the mouth and extending across the width, and which creates an operational opening for bar discharge on the side walls of the main section of the said crucible at a location with a continuous gap in the bar discharge window. 12. A continuous melting machine as described in claim 2, which creates lateral air vents in the crucible base. 13. A crucible is an open refractory vessel consisting of an opening made through the main body at a suitable lower position relative to the higher edge of the vessel; a barrier membrane positioned at the opening to prevent the metal rod from flowing out; and a rod discharge window made through the main body at a different position relative to the opening, with the lower edge located at a level close to the opening and extending across its width. 14. A crucible as described in claim 13, which defines a window for releasing such a metal rod by cutting out a channel so that the higher end of the channel reaches the higher edge of such container. 15. A crucible as described in claim 13, which connects the rail to the outside of the said release window, with the rail sloped upward from the lower edge of the said release window. 16. A method for melting and separating aluminum from materials containing aluminum and metals with higher melting points, using a continuous melting machine as defined in Reputation 1, which adds an appropriate amount of material to such a suitable crucible in order to retain the non-melting aluminum in the melting of the aluminum in such crucible. (Reputation 16, Figure 21)