The disclosure relates to a melting furnace, for example a two-chamber furnace, for the recovery of aluminum from aluminum scrap. This has a scrap chamber (2), with a dry hearth (6), the surface of which provided for receiving aluminum scrap is arranged above the surface of an aluminum melt (7) located in the scrap chamber (2) during operation of the melting furnace (1), and a heating chamber (3), which has at least one burner (9) for fuel firing, the heating chamber (3) and the scrap chamber (2) being separated from one another by a partition wall (11), the partition wall (11) having at least one opening (12) for recirculation of the aluminum melt (7) between the heating chamber (3) and the scrap chamber (2). Further, a refractory lining of the surface of the dry hearth (6) and/or a refractory lining of the inner wall of the scrap chamber (2) in the region of the dry hearth (6) have channels (18) which can be acted upon by hot gas and are designed to absorb heat from the hot gas and to release it to the aluminum scrap located on the surface of the dry hearth (6) for its thermal pretreatment.

A system for adding molten lithium and inert gas in a molten aluminium or aluminium alloy melt including, a crucible defining a chamber for melting and storing molten metal, in particular molten lithium; the crucible having a sealed lid; an inert gas delivery system for maintaining chamber overpressure using inert gas; a conduit for withdrawing a portion of the molten metal from the crucible. The conduit arranged with respect to the crucible or the sealed lid so the conduit inlet can be moved below and above the molten metal surface level and arranged for feeding molten metal from the crucible to a separate holding furnace with the help of overpressure when the conduit inlet is below the molten metal surface level and arranged for feeding inert gas from the crucible to the separate holding furnace when the conduit inlet is above the molten metal surface level.

A method includes one or more of the following five steps: (1) rough processing, (2) comminuting the material, (4) washing the material with acid, and (5) collecting/sorting the material to recover an aluminum product or a very pure aluminum product. A system may execute one or more of these steps to recover an aluminum product or a very pure aluminum product

A system and method for transferring molten metal from a vessel and into one or more of a ladle, ingot mold, launder, feed die cast machine or other structure is disclosed. The system includes at least a vessel for containing molten metal, an overflow (or dividing) wall, and a device or structure, such as a molten metal pump, for generating a stream of molten metal. The dividing wall divides the vessel into a first chamber and a second chamber, wherein part of the second chamber has a height H2. The device for generating a stream of molten metal, which is preferably a molten metal pump, is preferably positioned in the first chamber. When the device operates, it generates a stream of molten metal from the first chamber and into the second chamber. When the level of molten metal in the second chamber exceeds H2, molten metal flows out of the vessel and into another structure, such as into one or more ladles and/or one or more launders.

Methods and apparatus for processing a material, the material being the upper layer from a metal melting process, the material containing one or more salts, the material containing one or metals, are provided. The method includes feeding the material to a size reduction step; feeding the material from the size reduction step to a density based separation step; feeding the material from the density based separation step to a leaching step. The size reduction stage is optimised to provide exposure of material for a ferrous and non-ferrous metal separation. The ferrous separation is preferably provided by an eddy current separator. The non-ferrous separation is preferably provided by a cyclone.

Method and apparatus thereof to separate aluminum from aluminum-containing source material, such as fly ash, includes preparing a slurry of the source material and water in an agitation tank and adding a leaching reactant to the slurry in an amount dependent on the amount of aluminum in the source material. After agitation, transferring the mixture to a settling pond. After settling, transferring the liquid as a pregnant solution to an electric cell. Treating the pregnant solution in the electric cell by applying an electrical current that is periodically reversed as the pregnant solution passes between at least two metal plates in the electric cell. Collecting the treated solution in a cone bottom tank and separating aluminum particles from the treated solution using a filter press. Drying the particulate aluminum and pressing the aluminum into solid shapes.

Disclosed is a flux injector assembly and method for refining a molten material, wherein at least a portion of the material is aluminum, as it flows through a trough. A dispensing rod having a hollow body and a dispensing rim is configured to allow a flux and/or inert gas to travel through the hollow body and be injected into the molten material through the dispensing rim as the molten material flows through the trough. A baffle plate is configured to be positioned within the molten material in the associated trough to allow the molten material to flow passed the baffle plate. The elongated dispensing rod is positioned at a downstream location relative to the baffle plate. The rate of flow of molten material is increased as it passes the dispensing rim of the elongated dispensing rod to inject and mix the flux within the molten aluminum alloy.

Disclosed is a method for efficiently removing fluorine from a spent lithium battery. The method comprises: mixing aluminum and a sodium hydroxide solution for reaction to obtain a sodium metaaluminate solution; introducing sulfuric acid into the sodium metaaluminate solution, and stirring to react at a certain temperature to obtain a fluorine removal agent; adding a sodium fluoroaluminate seed crystal and the fluorine removal agent into an impurity-removed battery powder leaching solution, introducing a sodium carbonate solution at the same time, performing reaction at a certain temperature, controlling the pH value of a reaction endpoint, and performing solid-liquid separation after the reaction is finished to obtain a fluorine-removed liquid and filter residues; and adding the sodium hydroxide solution into the filter residues for reaction, and performing solid-liquid separation to obtain a filtrate containing fluorine and aluminum, and insoluble residues. According to the present invention, fluorine removal is induced by adding the sodium fluoroaluminate seed crystal; and during fluorine removal, the seed crystal sodium fluoroaluminate is firstly added into the battery leaching solution, and by means of induction of the seed crystal, combination of fluorine and aluminum in the solution can be accelerated to generate sodium hexafluoroaluminate, the reaction time is shortened, the fluorine removal efficiency is improved, and fluorine in the solution can be removed to be lower than 20 mg/L, thereby achieving the purpose of deep fluorine removal.

A process and apparatus for recovering aluminum metal from aluminum dross, the process including skimming aluminum dross from a furnace containing molten aluminum into a dross processing receptacle, transporting and mounting the dross filled receptacle to a rocking device, and rocking the receptacle until aluminum pours from discharging outlets in the receptacle into a container for catching the molten aluminum which is placed underneath the rocking device.

This disclosure belongs to the field of battery recycling technologies, and specifically, to a battery recycling method. An example battery recycling method is disclosed including: performing split processing on a battery to obtain a metal shell and an electrode assembly, where the electrode assembly includes a roll core or a lamination; and recycling the metal shell. According to the recycling method in various embodiments of this disclosure, the battery is not wholly crushed, but the battery is split to obtain the metal shell and the electrode assembly. In other words, the metal shell obtained through recycling by using the recycling method in this disclosure is not crushed, thereby ensuring reusability of the metal shell.