A method is provided for recycling lithium-ion batteries containing plastics, electrolyte, carbon, metals, and lithium. The method includes: Lithium-ion batteries are ground to form ground battery material which is then pyrolyzed at a temperature between about 100° C. and 700° C. for a time sufficient to vaporize about 80 wt % to 100 wt % of electrolytes present in the ground battery material. The resulting material is further ground and screen classified to produce a screen oversize and a screen undersize. The screen oversize comprises metals and plastics, while the screen undersize comprises a black mass material. Lithium dissolution, triboelectric charging and electrostatic separation of the black mass material (not necessarily in that order) produces a liquid comprising dissolved lithium, a graphite product, and a concentrated metal fines product. Lithium is precipitated from the liquid comprising dissolved lithium, and the concentrated metal fines can be further treated by hydrometallurgy or pyrometallurgy processes.

The present invention describes a process for removing uranium from a copper concentrate by magnetic separation (low and high field) to reduce the uranium content to commercially acceptable levels.

The invention discloses a method for producing silicon carbide from waste circuit board cracking residue, belongs to the field of comprehensive utilization of waste circuit board cracking products, and particularly relates to a method for high-valued utilization of non-metal components in waste circuit board cracking residue. The method mainly comprises the following steps: rolling and crushing, vibration sorting, ultrafine pulverization and electro-separation, quantitative batching, microwave sintering and discharging and grading. Compared with the prior art, rolling crushing is adopted to replace traditional shearing crushing, microwave sintering is adopted to replace a traditional Acheson smelting furnace, the effects of being easy to operate, saving energy and reducing consumption are achieved, the production efficiency is greatly improved, and the production cost is reduced. A brand-new method for obtaining high-purity silicon carbide by partially replacing anthracite and quartz sand with cracked coke and silicon dioxide in waste circuit board light plates or epoxy resin cracking residues is adopted, and high-value utilization of waste resources is achieved. The method has the characteristics of simple and feasible process, low manufacturing cost and wide adaptability, and is beneficial to improving the economic benefit and social benefit of enterprise production.

A plant for the treatment of car fluff is disclosed having one or more magnetic iron separators, followed by one or more eddy current separators that receive the negative coming from the magnetic iron separators, followed by one or more inductive sensor-based recovery separators that receive the negative coming from the eddy current separators, followed by at least two inductive sensor-based polishing separators respectively calibrated for the separation of stainless steel and copper wires arranged for receiving the material separated by the inductive sensor-based recovery separators, an unravelling shredder also being arranged between the latter and the polishing separator(s) calibrated for the separation of copper wires.

The disclosed technology includes a method for producing ultrafine alumina from salt slag waste generated in aluminum recycling useful in the manufacture of durable ceramic products; a system for recovering alumina from salt slag waste; a method and systems for recovering salts, aluminum and alumina from salt slag waste; and a method and systems of capturing ammonia in a process recovering salts, aluminum and alumina from salt slag waste. The methods and systems provided crush the dry particles of the salt slag waste, scrub the slag with water, and with steam and by means of a vented alumina press, dewater the scrubbed slag particles. In some methods and systems of the disclosed technology, the particles of the pressed alumina cake are further reduced. In some methods and systems, the salt in the salt effluent is crystalized. In some methods and systems of the disclosed technology, the ammonia is contained and captured.

The invention relates to recovery of tin-lead solder from electronic printed circuit board scrap. The scrap is placed in a liquid-permeable and/or gas-permeable container, which is placed in a liquid or gaseous heat-transfer medium heated to or above the melting temperature of the tin-lead solder. After the tin-lead solder is melted, the heat-transfer medium is removed from the container, then, by means of rotation of the container, the melted tin-lead solder and the remains of the heat-transfer medium are removed from the container. The device comprises a hollow container, which is mounted so as to be capable of rotation and is designed in the form of a body of revolution, and is liquid-permeable and/or gas-permeable in a radial direction from the axis of rotation. The container can be designed in the form of a drum, which can be vertically displaced and has perforated side walls.

Cathode material from exhausted lithium ion batteries are dissolved in a solution for extracting the useful elements Co (cobalt), Ni (nickel), Al (Aluminum) and Mn (manganese) to produce active cathode materials for new batteries. The solution includes compounds of desirable materials such as cobalt, nickel, aluminum and manganese dissolved as compounds from the exhausted cathode material of spent cells. Depending on a desired proportion, or ratio, of the desired materials, raw materials are added to the solution to achieve the desired ratio of the commingled compounds for the recycled cathode material for new cells. The desired materials precipitate out of solution without extensive heating or separation of the desired materials into individual compounds or elements. The resulting active cathode material has the predetermined ratio for use in new cells, and avoids high heat typically required to separate the useful elements because the desired materials remain commingled in solution.

This invention relates to the field of recycling non-ferrous metals (for example, aluminium and alloys thereof, magnesium and zinc). The claimed device comprises: a frame with a dross compression head; an ingot mold for collecting metal compressed from the dross; a dross pot mounted on said ingot mold; at least one through opening with a connection means for supplying a vacuum, said opening being situated in the bottom part of the dross pot and/or in the ingot mold; and a seal, situated in the gap between the dross pot and the ingot mold; furthermore, one or several through drainage openings are provided in the bottom part of the dross pot. The device may comprise a seal between the dross compression head and the dross pot. The head may be provided with one or several ribs. The dross pot may be provided with one or several ribs. The head may be hollow and provided with two or more air-cooling connecting pipes. The device may comprise a cover, sealingly mounted on a rod of a hydraulic cylinder of a device for compressing hot dross such as to be capable of sliding along the rod, said cover sealingly conforming to the edges of the dross pot. The device may comprise a cover, sealingly mounted on a rod of a hydraulic cylinder of a dross press such as to be capable of sliding along the rod with the aid of pneumatic or hydraulic cylinders (1 to 4 in total), said cover sealingly conforming to the edges of the dross pot. The device may comprise a cover, sealingly mounted on a rod of a hydraulic cylinder of a dross press such as to be capable of sliding along the rod, said cover sealingly conforming to the edges of the dross pot, and at least one through opening with a connection means for supplying an inert gas. The device may comprise one or several dross pot vibrators and/or head vibrators, or magnetohydrodynamic (MHD) pumps, for moving the metal toward the one or several drainage openings in the bottom part of the dross pot. The claimed method for recovering a non-ferrous metal from hot dross, preferably aluminium, aluminium alloy, magnesium or zinc dross, comprises the following steps/operations: (a) removing dross to the dross pot of the above-mentioned device; (b) collecting a non-ferrous metal, which is drained through at least one through opening in the bottom part of the dross pot; (c) mechanically compressing the dross by the application of force to the dross between a compression head and the dross pot in order to recover a non-ferrous metal from the dross, enable the migration of the non-ferrous metal in the direction of the surface boundary of the compressed dross, the formation of an outer layer of non-ferrous metal, which encapsulates an inner oxide

Systems and methods for recovering neodymium and other related rare earth elements from permanent magnets and/or various ore compositions are presented herein. In one embodiment, a method of recovering a rare earth element (REE) from a permanent magnet material and/or a mined ore composition (collectively “work material”) is presented. The method includes converting the work material to a higher surface area form, treating the converted work material with an aqueous solution of alkaline carbonates to dissolve the REE, filtering the treated and converted work material to yield a filtrate, and treating the filtrate with at least one of a precipitating agent or a precipitating condition to form REE solids. The aqueous solution of alkaline carbonates comprises at least one of potassium carbonate, potassium bicarbonate, or dissolved carbon dioxide.

A recycling process that facilitates separation of materials from metallic substrates by cryogenically cooling the recyclable items to induce embrittlement of the metals. Embrittled metals may be shattered more efficiently and with a higher yield of materials bound to the metallic substrates. Metal embrittlement may be induced by mixing the source stream with liquid nitrogen, and cooling the stream to approximately minus 200° F. Multiple recovery stages may be employed to maximize the yield of the target materials. Embodiments may enable recovery of platinum group metals (PGMs) from catalytic converters with metallic foil substrates. Yield of PGMs may be enhanced by employing a primary recovery stage and a secondary recovery stage, by cryogenically cooling input materials for each stage, by mixing the pulverized material in secondary recovery with an aqueous solution to dissipate attractive charges, and by wet screening the pulverized material slurry to obtain the PGM particles.