In a method for recovering active metals of a lithium secondary battery according to an embodiment, a cathode active material mixture is collected from the cathode of the lithium secondary battery, the cathode active material mixture is reduced by a reducing reaction to prepare a preliminary precursor mixture, an aqueous lithium precursor solution is formed from the preliminary precursor mixture, and an aluminum-containing material is removed from the aqueous lithium precursor solution with an aluminum removing resin.

A method for removal of organic coatings from loose aluminum scrap includes passing the scrap through a Multiple Hearth Furnace operatively maintained in the range of 500 F.-1600 F. Each hearth in the furnace is independently temperature controlled and held under a slightly negative pressure environment. The hearths heat the scrap such that pyrolysis of the coatings occurs within the hearth. Organic compounds liberated during this process are partially or entirely consumed within the furnace combustion products are exhausted through the top. Hydrogen fluoride contained in the products of combustion is incinerated prior to final discharge from the system and routing to additional environmental equipment for particle removal. Scrap is continuously fed into the top of the furnace, and agitated and mechanically moved within each hearth toward an output of another hearth therebelow. The agitation and movement of the scrap exposes the scrap to the hearth atmosphere to assist in processing of the scrap. The discharge of the scrap in the final hearth supplies hot (250 F.-900 F.), clean material for the next step in the process for secondary aluminum recycling.

It is described a process for extracting aluminum from aluminum-bearing materials comprising the steps of leaching the aluminum-bearing material with HCl to obtain aluminum chloride; separating and purifying the aluminum chloride; providing aluminum chloride to an electrolysis cell comprising an anode connected to a source of hydrogen gas delivering the hydrogen gas during use to the anode, and a cathode; passing an electric current from the anode through the cathode, depositing aluminum at the cathode; and draining the aluminum from the cathode.

The invention relates to a method of manufacturing an aluminum alloy ingot using scrap aluminum alloy in the 2xxx or 7xxx series wherein (i) scrap aluminum alloy in the 2xxx or 7xxx series is procured; (ii) optionally, oil present on the scrap is separated, (iii) a first treatment operation of said scrap is made by a first liquid at a temperature of at least 10 C., said first liquid being an aqueous solution with pH equal to 1 to 5 or 8 to 13, (iv) the first liquid and the scrap thus treated are separated, (v) at least one second treatment operation of said scrap by a second liquid is made, (vi) the second liquid and the scrap thus treated are separated, (vii) said scrap thus obtained is melted, (viii) a first solidification is made in a rough intermediate form, (viii) an aluminum alloy ingot in the series of scrap used is cast; The invention also relates to a fabrication method after rolling, extrusion and/or forging of an aeronautical structure comprising the steps in the above method, and then at least one rolling, extrusion and/or forging step of said aluminum alloy ingot in the series of scrap used.

In a method for treating aluminum slags (41) in the form of dross or aluminum salt slags obtained in the preparation of aluminum, the aluminum slag (41) in the melting process is brought onto a cooling conveyor (16). A first section (18) of the cooling conveyor is flushed with an inert gas and a second section (29) serves for further cooling of the aluminum slag (41) with introduction of air. In the first section (18), the aluminum slag (41) is cooled to a temperature at which the aluminum slag (41) can no longer be chemically changed by exposure to atmospheric oxygen. In the second section (29), the slag is cooled to a temperature at which the cooled aluminum slag (41) can be processed further to recover the aluminum after leaving the cooling conveyor (16).

A heat treatment method for lithium ion battery waste includes: a battery heating step of heating lithium ion battery waste in a heat treatment furnace 1 while feeding an inert gas; and a gas combustion step of delivering a gas generated in the heat treatment furnace 1 into a gas combustion furnace 2 and burning the generated gas in the gas combustion furnace 2, wherein a gauge pressure in the heat treatment furnace is maintained in a range of 0.20 kPa to 0.01 kPa, when the lithium ion battery waste is heated while feeding the inert gas into the heat treatment furnace 1 in the battery heating step.

A cooling system includes a sensor and a cooling conveyor. The sensor measures a dust characteristic of dust discharged from a dust cyclone of a decoating system. The cooling conveyor receives the dust from the dust cyclone and cools the dust at a cooling rate, and the cooling rate may be controlled based on the measured dust characteristic. A method of cooling dust from a dust cyclone of a decoating system with a cooling system includes measuring a dust characteristic of the dust discharged from the dust cyclone and into a cooling conveyor of the cooling system. The method also includes advancing the dust along the cooling conveyor and cooling the dust at a cooling rate based on the measured dust characteristic.

There are provided processes for purifying aluminum ions. Such processes comprise precipitating the aluminum ions under the form of Al(OH).sub.3 at a first pH range; converting Al(OH).sub.3 into AlCl.sub.3 by reacting Al(OH).sub.3 with HCl and precipitating said AlCl.sub.3; and heating the AlCl.sub.3 under conditions effective for converting AlCl.sub.3 into Al.sub.2O.sub.3 and optionally recovering gaseous HCl so-produced. The processes can also comprise converting alumina into aluminum.

Disclosed is a lithium recovery system for black mass, including: a heat treatment unit that performs heat treatment to convert the black mass into soluble substances and insoluble substances; a water leaching unit that leaches the heat-treated black mass with water to separate the heat-treated black mass into a water leaching solution, which contains lithium ions and carbonate ions, and insoluble substances; and an impurity removal unit that removes impurities contained in the water leaching solution by lowering pH of the water leaching solution through addition of carbon dioxide-containing gas to the water leaching solution.

The invention relates to a method for preparing and evaluating lithium-ion batteries, having at least one step in which the batteries (2, 10) or comminuted in the presence of an aqueous medium (12), wherein the batteries (2, 10) are comminuted with a remaining charge of maximally 30% in a comminuting device (73) while adding water (12), and the water (12) is supplied in such a quantity and at such a temperature that the mixture is not heated above a temperature of more than 40 C., preferably above 30 C., during the comminuting process. The invention also relates to a corresponding facility (71).