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135results about "Chemistry apparatus and processes" patented technology

Rare earth element recovery method

Provided is a method of recovering rare-earth elements, including causing rare-earth elements particularly including Nd and Dy to leach efficiently from a raw material for leaching which contains the rare-earth elements, and separating and recovering the rare-earth elements. The method of recovering rare-earth elements includes: a leaching step including performing leaching treatment of rare-earth elements in which an acidic slurry of a raw material for leaching which contains the rare-earth elements is held under a predetermined condition, and then subjecting the slurry obtained after the leaching treatment to solid-liquid separation, yielding a leachate containing the rare-earth elements; and a separation step of separating and recovering the rare-earth elements from the yielded leachate, in which: the raw material for leaching contains Ca as CaO at a ratio of 4 to 15 mass % and Ti as TiO2 at a ratio of 2 to 13 mass % in a solid component (S); an acid aqueous solution is an acid aqueous solution of hydrochloric acid and/or nitric acid; and the leaching treatment performed in the leaching step is digestion or maceration which is performed under the heating and pressurizing conditions of a temperature of 160 to 300° C. and a pressure of 0.65 to 10 MPa, and the rare-earth elements are caused to leach together with Ca in the leaching step.
Owner:NIPPON LIGHT METAL CO LTD

Method for separating lithium cobalt oxide and aluminum foil on scrapped lithium ion battery positive pole piece

The invention relates to a method for separating lithium cobalt oxide and aluminum foil on a scrapped lithium ion battery positive pole piece. The method comprises the following steps: charging and dismantling a scrapped lithium ion battery, placing the waste positive pole piece into a box-type resistance furnace, roasting the waste positive pole piece in the box-type resistance furnace at the temperature of 500 to 600 DEG C, placing the roasted positive pole piece into a vessel with water, stirring the positive pole piece in the water by utilizing an electric stirrer, and screening substances in the vessel by utilizing a screen, wherein a substance on the screen is aluminum foil; washing the substance on the screen by utilizing the water, and naturally drying the substance to obtain the aluminum foil; filtering the substance below the screen (the substance below the screen is a mixed solution containing a positive active substance), placing the naturally dried filtered substance into a ceramic crucible, placing the ceramic crucible into the box-type resistance furnace to be processed at high temperature to obtain the lithium cobalt oxide. Compared with the prior art, the method has the advantages that easiness in operation is realized, the requirement on a separation device is low, the efficiency for separating the lithium cobalt oxide and the aluminum foil is high, the cost is low, no organic solvent needs to be used in the processing step, and no secondary pollution is produced in the separation process.
Owner:LANZHOU UNIVERSITY OF TECHNOLOGY

Separation method of lithium cobalt oxide and aluminum foil on positive electrode sheet of scrap lithium ion battery

The separation method of lithium cobalt oxide and aluminum foil on the positive electrode sheet of the scrap lithium-ion battery, the steps are: discharge and disassemble the waste lithium-ion battery, and then put the waste positive electrode sheet into a box-type resistance furnace and bake it at 500~600°C , put the roasted positive electrode sheet into a container with water and stir it with an electric stirrer, then sieve the material in the container with a sieve, the sieve is aluminum foil, the sieve aluminum foil is washed with water, and dried naturally Aluminum foil is obtained; the undersize is a mixed solution containing positive active substances, the undersize is suction filtered, and the filtered oversize after natural drying is put into a ceramic crucible, and then placed in a box-type resistance furnace for high temperature treatment to obtain Lithium Cobalt Oxide. Compared with the prior art, the present invention has the advantages of easy operation, low requirement for separation equipment, high separation efficiency and low cost of lithium cobalt oxide and aluminum foil, no need to use any organic solvent in the treatment process, and no secondary pollution during the separation process.
Owner:LANZHOU UNIVERSITY OF TECHNOLOGY

Disassembly device for reusable surface-mounted components of waste circuit board

The invention belongs to the field of recycling and reusing of electric product waste and discloses a disassembly device for reusable surface-mounted components of a waste circuit board. The disassembly device is composed of a heating system, a cooling system, a conveyer system, a sweeping system and a component collecting mechanism. The heating system is composed of heating areas. The cooling system is composed of a cooling area. The conveyer system is composed of a horizontally-installed conveyor chain, a driven chain wheel, a driving chain wheel, a U-shaped groove and a motor. The sweeping system is composed of sweeping mechanisms, the sweeping mechanisms on all stages are respectively provided with a left hairbrush and a right hairbrush, and the hairbrushes can be arranged in a rotating mode or a reciprocating mode. A hot air box is composed of a rectifying plate, a heater and a fan. The disassembly device for the reusable surface-mounted components of the waste circuit board has the advantages that the circuit board is conveyed through a retaining ring with a simple structure, thus, time is saved, and manufacturing cost is lowered; because the rectifying plate is vertically placed, the problem that the tiny surface-mounted components and solder enter small holes of the rectifying plate easily after the circuit board is heated and de-soldered is solved, line production can be realized, and efficiency can be improved.
Owner:TSINGHUA UNIV
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