Abstract: A hydrogen concentration-controllable safe reaction tank for leaching of waste battery powder, includes at bed provided with supporting frames and a driver; a rotary acid pumping barrel articulated with the supporting frames, the driver being configured to drive the rotary acid pumping barrel to rotate, and a delivery pipe mounted on the bed and passing through the rotary acid pumping barrel where a screw for pushing material is disposed in the delivery pipe; the delivery pipe includes a pouring section located in the rotary acid pumping barrel, the pouring section is provided with a pouring opening at an upper portion and acid leakage holes at a bottom, and at least one acid pumping plate is mounted on an inner wall of the rotary acid pumping barrel.

Abstract: A fire extinguishing agent capable of extinguishing aluminum slag combustion, includes the following raw materials: sulfate, chloride salt, a mineral, silca gel, a surfactant and sterate.

Abstract: A reaction kettle cleaning apparatus, includes a kettle body and a stirrer, the stirrer being located in the kettle body and including a stirring rod and a stirring portion, where a movable frame is disposed on the stirring rod and is movable along the stirring rod; and a cleaning device is disposed on the movable frame and is configured to clean the kettle body; and the reaction kettle cleaning apparatus further includes a movable control apparatus configured to control the movable frame to move.

Abstract: A treatment method of scrapped positive electrode slurry, includes the following steps: pretreating the scrapped positive electrode slurry to obtain a slurry solution; performing electrophoresis coagulation and filter pressing on the slurry solution to obtain a liquid phase and a solid phase; and performing gradient roasting on the solid phase to obtain a positive electrode material.

Abstract: A method of preparing lithium iron phosphate by recycling and utilizing waste batteries. The method may include pre-processing a waste lithium iron phosphate battery to obtain lithium iron phosphate powder, adding alkaline liquid to the lithium iron phosphate powder, and filtering to obtain a filter residue: an iron source, a lithium source or a phosphorus source to the filter residue, and performing ball milling to obtain a ball-milled product; preparing a carbon source solution, and adding a surfactant to the carbon source sol ion to obtain a mixed solution; mixing the ball-milled product and the mixed solution, performing spray pyrolysis to obtain a high-temperature powder, spraying atomized water to the high-temperature powder to remove impurities, and then calcining to obtain a finished product of lithium iron phosphate.

Abstract: A preparation method of nano-scaled iron phosphate, includes the steps of: adding a surfactant and a polymer microsphere to an iron salt solution to obtain a mixed liquid; adding a phosphate solution to the mixed liquid for reaction to obtain an iron phosphate slurry; performing solid-liquid separation after removing the polymer microsphere from the iron phosphate slurry, drying and calcining the obtained solid to obtain a nano-scaled iron phosphate.

Abstract: A method for safely oxidising roasting NdFeB powder material. The method may include: S1: magnetizing and drying the NdFeB powder material; S2: heating the magnetized and dried NdFeB powder material to spontaneous combustion, and then preparing the spontaneous combustion product into a powder; and S3: magnetizing and then oxidising roasting the powder to obtain NdFeB oxide.

Abstract: Disclosed are a ternary single crystal positive electrode material, a preparation method therefor and use thereof. The preparation method comprises the following steps: mixing a ternary polycrystalline micropowder, raising a temperature, carrying out a primary sintering, and lowering the temperature to obtain an intermediate; subjecting the intermediate to jet pulverization to obtain a single crystal material, washing the single crystal material with water, and centrifugally drying the single crystal material to obtain a material with a residual alkali content of less than 1500 ppm; and adding a coating agent to the material, raising a temperature, carrying out a secondary sintering, and lowering the temperature to obtain the ternary single crystal positive electrode material. In the present disclosure, by using a jet pulverization device to open a polycrystalline material to form small single crystal particles, the electrochemical performance and the energy density of the material is improved.

Abstract: A method for removing impurities from a waste lithium battery safely through pyrolysis. The method may include: (1) performing primary roasting on electrode fragments of a waste lithium battery, quenching, and then layered screening to obtain a current collector fragment and an electrode material; (2) mixing and grinding the electrode material and a grinding aid, soaking the mixture in an alkali liquor, filtering and taking out filter residues to obtain electrode powder, and (3) performing secondary roasting on the electrode powder to obtain a positive electrode material.

Abstract: Disclosed are a pre-lithiated lithium ion positive electrode material, a preparation method therefor and use thereof. The lithium ion positive electrode material has a chemical formula of Li2O/[A(3-x)Mex]1/3-LiAO2, wherein A comprises M, and wherein M is at least one of Ni, Co, and Mn; and wherein Me is at least one of Ni, Mn, Al, Mg, Ti, Zr, Y, Mo, W, Na, Ce, Cr, Zn or Fe; and wherein 0<x<0.1. The material is co-doped with multiple elements, and these elements act synergistically to inhibit the irreversible phase change at a high voltage and improve the stability of the structure of a substrate. The spinel phase A(3-x)MexO4 structure contains the doping elements, which work together to improve the interfacial activity of the material and introduce more electrochemically active sites.

Abstract: The invention discloses a method and application for a safe recovery of waste anode pieces of lithium ion batteries. The method comprises the following steps: crushing and sieving the waste anode piece to obtain an anode powder A and a crushed aluminum slag; mixing the crushed aluminum slag with an acid solution, stirring under ultrasound, and then performing wet sieving to obtain an aluminum slag and a battery powder; the obtained aluminum slag is washed with water, then rinsed with an explosion suppressant, centrifuging to obtain an explosion suppressing aluminum slag, and then packed and compressed to obtain an aluminum slag block; connecting the two ends of the aluminum slag block to a positive plate and a negative plate of a DC electrode respectively, applying a current to melt the aluminum slag block, and cooling to obtain a safe aluminum slag block.

Abstract: The present invention relates to a method for recycling iron and aluminum in a nickel-cobalt-manganese solution. The method comprises the following steps: leaching a battery powder and removing copper therefrom to obtain a copper-removed solution, and adjusting the pH value in stages to remove iron and aluminum, so as to obtain a goethite slag and an iron-aluminum slag separately; mixing the iron-aluminum slag with an alkali liquor, and heating and stirring same to obtain an aluminum-containing solution and alkaline slag; and heating and stirring the aluminum-containing solution, introducing carbon dioxide thereto and controlling the pH value to obtain aluminum hydroxide and an aluminum-removed solution.