A method comprises: sorting and removing impurities from magnesium alloy waste material, and cleaning and drying said material, the cleaning comprising high-pressure rinsing, pickling, and water washing, performed in sequence; preheating the magnesium alloy waste material obtained in step a, and adding material, melting, refining, removing impurities, and alloying to obtain a magnesium alloy liquid; casting ingots from the magnesium alloy liquid obtained in step b, to obtain magnesium alloy ingots conforming to national standards. The method directly takes magnesium alloy waste material as a raw material to produce magnesium alloy ingots conforming to national standards; the addition of costly high-purity magnesium is unnecessary, and the number of castings in which the amount of harmful elements meets specifications accounts for 98% or more of the total number of castings; 2% slightly exceed specifications, which does not constitute a severe number of times specifications are exceeded.

A plant for recovering metals and/or metal oxides from industrial process waste, in particular oil product refining waste, comprises a furnace; a feed line connected to a main inlet of the furnace and configured to feed the furnace with a solid waste containing metals, in particular in oxide form; an outlet line, connected to a solid phase outlet of the furnace and configured to draw a metal-enriched solid phase out of the furnace; the furnace is a belt conveyor furnace having a belt conveyor closed in a loop with a substantially horizontal configuration and having a top face, which receives the waste to treat and conveys it between two longitudinal opposite ends of the belt conveyor furnace respectively provided with the main inlet and the solid phase outlet.

A reduced metal powder prepared by processing a waste lithium ion secondary battery to recover valuable metals from the waste lithium ion secondary battery in an economical and environmentally friendly manner is described. To achieve the goal described above, the reduced metal powder according to an embodiment is prepared by pyrolyzing a waste lithium ion secondary battery, and contains metals Ni and Co and has magnetism.

The various embodiments of the present invention provide a system and method for extraction of metal values from active material of Lithium-ion batteries. The system comprises a separation module and an extraction module. The extraction module further comprises an inert container, a furnace apparatus, a quenching apparatus, a filtration mechanism and a wet magnetic separation apparatus. The black mass obtained from the separation process is heated in a furnace and then quenched. The suspension is then filtered, and the solution is then evaporated to extract Lithium values. The filtrate residue is subjected to wet magnetic separation, where the magnetic material comprises Cobalt, Nickel and a plurality of other elements in the form of a non-magnetic mass.

A process for recovery of at least one transition metal including selected Ni, Co and Mn and lithium from waste of lithium ion batteries comprising the steps of, subjecting at least a part of said waste of lithium ion batteries including said transition metal in trivalent state to reductive leaching in mineral/organic acids in presence of copper as reductant in the temperature range of 0-100 C. for 5 mins to 12 hrs; and thereafter, following said leaching step by solid liquid separation to remove the undissolved materials to get the clear leach solution of anyone or more of Li, Ni, Co, Mn and Cu for desired recovery therefrom. The process pertains specifically to reductive leaching of a portion of the black mass of the waste lithium ion batteries with copper and selectively reducing the remaining portion of said black mass at high temperature followed by cementation of copper with the metals present in the reduced mass in an energy-efficient and cost-effective technique compared to the conventional high temperature reduction. The reduction step can be avoided by removing the copper from solution either by selective crystallization of copper, or selective Electrowinning of copper or by use of Ni/Co containing scrap.

The present invention provides a method for recycling waste cemented carbide by molten salt chemistry, comprising the steps of: (1) carrying out vacuum dehydration on a molten salt media; (2) carrying out oxidation-dissolution reaction on waste cemented carbide in the molten salt media; (3) carrying out deoxidation treatment on a molten salt system; (4) carrying out thermal reduction reaction on the molten salt system; and (5) washing filtering and vacuum drying obtained mixture by thermal reduction reaction to carry out separation and collection of the molten salt media and waste cemented carbide nano powder. Compared with existing method for recycling waste cemented carbide, the invention has the advantages of short flow, simple equipment, low energy consumption, and excellent recycled products. Moreover, the invention doesn't produce solid/gas/liquid harmful substances to pollute the environment, and can create enormous economic and social benefits.

A processing method disclosed herein includes a heating step of heating at 850 C. or more, a collection target including a positive electrode containing at least a lithium-transition metal complex oxide with a layer structure and a negative electrode containing a carbon material, and a separating step of adding a foaming agent and a scavenger to a slurry including the collection target after the heating step and separating a metal component and a carbon component included in the collection target.

A manufacture method disclosed herein includes: a preparation step S11 of preparing a recovery object; a measurement step S12 of measuring a quantity of oxygen element and a reducing component contained in the recovery object; a determination step S13 of determining whether or not a quantity ratio of the reducing component relative to oxygen element is higher than or equal to a threshold value based on a stoichiometric ratio of an oxide of the reducing component; a reducing component addition step S14 of adding the reducing component to the recovery object when a determined result value in the determination step is lower than the threshold value; and a heating step S15 of heating the recovery object under an inert atmosphere. This method makes it possible to reduce the valuable metal into an elemental metal, and therefore a valuable metal recovery efficiency can be improved.

A recycling method of a waste lithium ion secondary battery may include (a) charging a waste lithium ion secondary battery into a pyrolysis furnace, (b) increasing the internal temperature of the pyrolysis furnace to induce self-heating of the waste lithium ion secondary battery, (c) maintaining a self-heating reaction of the waste lithium ion secondary battery, (d) discharging a first powder formed after completing the self-heating reaction of the waste lithium ion secondary battery, and (e) injecting the first powder into water, dissolving a lithium component included in the first powder, and separating and recovering a lithium aqueous solution, a precipitate settled in the lithium aqueous solution, and a floating material on the surface of the lithium aqueous solution, separately.

A method and an apparatus for recovering copper, bronze and lead by allowing methane gas to flow into a reactor and heat-treating a mixture of copper oxide, tin oxide and lead oxide under a temperature condition of 700-900 C. is disclosed. The method includes placing a mixture of copper oxide, tin oxide and lead oxide in a reactor, increasing the temperature inside the reactor, and allowing a reductive gas to flow into the reactor so as to heat-treat the mixture.