Abstract: Disclosed is a preparation method of porous sodium iron phosphate used as a sodium ion battery cathode material, which includes: mixing ferrous nitrate, silver nitrate and a reducing agent to prepare a mixed solution, adding the mixed solution dropwise to a carbonate solution for reaction to obtain a precipitate, mixing the precipitate with sodium dihydrogen phosphate and sodium iodide and then grinding, sintering the ground material under the condition of air isolation, and soaking the sintered material in an organic solvent to obtain porous sodium iron phosphate used as a sodium ion battery cathode material.

Abstract: A method for recycling and preparing a positive electrode material from waste lithium iron phosphate batteries. The method comprises the following steps: discharging, crushing, and stripping waste lithium iron phosphate batteries to obtain black powder; then mixing the black powder with benzenesulfonate, and reacting in a fluidized bed; and then adding an acid and an alkali to remove impurities, finally adding a lithium supplement, an iron supplement, or a phosphate, and a reducing agent, and sintering. According to the method, by controlling and optimizing the crushing, stripping, carbon and fluorine removal, and impurity removal processes, a positive electrode material with high purity can be recycled while controlling the recycling cost, and batteries prepared by means of the recycled positive electrode material have good performance.

Abstract: Disclosed are a preparation method of a carbon dioxide capture agent and an application thereof. The method includes: mixing a graphite dispersion, an organic acid solution, a metal salt solution and a silica sol to obtain an organic-inorganic composite gel; standing and aging the organic-inorganic composite gel, drying the same and then carbonizing the same by microwave in a mixed atmosphere of inert gas and sulfur dioxide to obtain an intermediate product; and subjecting the intermediate product to acid washing or alkali washing to obtain a defective carrier, then mixing the defective carrier with an amine substance for ultrasonic treatment and drying to obtain the carbon dioxide capture agent.

Abstract: A method for preparing a refractory material from waste battery residues. The method comprises the following steps: (1) disassembling waste batteries, then sorting same to obtain positive and negative electrode powders, leaching the positive and negative electrode powders with an acid, filtering same to obtain a graphite slag, and then subjecting the filtrate to copper removal, followed by the addition of an alkali for a precipitation reaction, wherein the resulting precipitate is an iron-aluminum slag; (2) wrapping the graphite slag obtained in step (1) with wet clay to form an inner core material, then mixing wet clay with the iron-aluminum slag, wrapping the inner core material with same, and aging the wrapped inner core material to obtain a blank; (3) pre-sintering, calcining and cooling the blank prepared in step (2) to obtain a fired product; and (4) washing and drying the fired product to obtain the refractory material.

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: The present invention provides a method for directly preparing nickel sulfate from low nickel matte, a nickel sulfate and an application thereof, the method comprising the following steps: a) pre-treating a low nickel matte to obtain ferronickel powder; b) mixing the ferronickel powder with a sulfuric acid solution, stirring, dissolving, and then evaporating, to obtain a supersaturated sulfate solution; c) cooling the supersaturated sulfate solution to ?5° C.-0° C., and performing suction filtration to obtain an insoluble solid; d) washing the insoluble solid with water, and removing impurities from the filtrate to obtain a nickel hydroxide precipitate; impurity removal comprising successively removing iron, and removing calcium and magnesium; e) washing the nickel hydroxide precipitate with water, acid-dissolving and evaporating to obtain nickel sulfate. The present invention increases the amount of nickel recovered, the purity of nickel sulfate being 18.10%-19.24% nickel, and the recovery rate being 94.

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 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 producing ferronickel and removing chromium from nickel laterite ore, including the following steps: (1) subjecting the nickel laterite ore to ore washing and separating to obtain an ore slurry and a mineral aggregate, adding an alkali liquor and a bromate and introducing oxygen to the ore slurry to allow oxidation leaching, and then conducting solid-liquid separation to obtain a solid and a chromium-containing filtrate; (2) subjecting the solid obtained in step (1) to washing and solid-liquid separation to obtain a solid phase and washing water, and mixing the solid phase with quicklime and a reducing agent to obtain a mixture; and (3) subjecting the mixture obtained in step (2) to roasting and smelting successively to obtain a finished ferronickel product. The method achieves enrichment of chromium, and produces ferronickel through smelting of the nickel laterite ore while removing the impurity chromium, protecting the safety of a furnace.

Abstract: A doped sodium vanadium phosphate and a preparation method and application thereof. Preparation steps of a nitrogen-doped peony-shaped molybdenum oxide in raw materials of the doped sodium vanadium phosphate are as follows: adding a regulator into a molybdenum-containing solution for reaction, concentrating and thermal treatment to obtain a peony-shaped molybdenum oxide; and dissolving the peony-shaped molybdenum oxide in a conditioning agent, and adding an amine source for standing, centrifuging, washing and heat treatment, thus obtaining the nitrogen-doped peony-shaped molybdenum oxide.

Abstract: Disclosed in the present invention is a method for extracting valuable metal from low-matte nickel converter slag. The method comprises: mixing low-matte nickel converter slag and quicklime then calcinating, obtaining a calcinated material; grinding and magnetically separating the calcinated material, obtaining silicate and iron-rich slag; adding a strong alkali solution to the iron-rich slag to perform leaching processing, and performing solid-liquid separation, obtaining a filtrate and a residue; mixing the residue with an acid solution, performing oxygen pressure acid leaching, and performing solid-liquid separation, obtaining a leachate and iron oxide; introducing hydrogen sulfide gas into the leachate, adjusting the pH, and performing solid-liquid separation, obtaining a copper sulfide precipitate and a nickel-cobalt-containing filtrate.

Abstract: Disclosed are a nickel-iron wet treatment method and an application thereof. The treatment method comprises: in a high-pressure oxygen environment, mixing a crushed nickel-iron material, sulphuric acid and a corrosion aid, performing an acid leaching reaction, then performing solid-liquid separation on slurry subjected to acid leaching, adding an oxidant into the obtained filtrate, performing heating, removing the corrosion aid, adding a precipitating agent into the filtrate, controlling the pH value of the filtrate, and performing solid-liquid separation to obtain a ferric hydroxide precipitate and a nickel-containing filtrate; and performing extraction and back extraction on the nickel-containing filtrate to prepare battery-grade nickel sulphate.

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 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 laser cleaning method and device for improving uniformity of a laser cleaning surface are provided. The laser cleaning method includes: applying a peaked-top sine wave signal to a motor; controlling a galvanometer to swing in a reciprocated manner by the motor; shaping a laser beam emitted by a laser to a linear beam by the reciprocated swing of the galvanometer; and performing laser cleaning using the shaped linear beam.

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: A display panel includes first sub-pixels, second sub-pixels and third sub-pixels. Each pixel unit includes a first sub-pixel, a second sub-pixel and two third sub-pixels disposed in a virtual octagon. The two third sub-pixels are distributed on two opposite sides of a pixel column constituted by the first sub-pixel and the second sub-pixel.

Abstract: The present disclosure belongs to the technical field of battery recycling, and discloses a method for recovering an aluminum residue with a controlled particle size, and use thereof. The method includes the following steps: crushing and sieving a positive electrode sheet of a waste power battery, then, crushing at ?198° C. to ?196° C. with addition of liquid nitrogen to obtain a granular material; roasting, cooling, and grinding the granular material, adding water, shaking, settling into layers, and separating the layers to obtain a positive electrode active powder layer, a transition layer, and an aluminum residue particle layer; and shaking the aluminum residue particle layer and the transition layer for a second time, settling into layers, and collecting aluminum residue particles and a positive electrode active powder.

Abstract: The present disclosure discloses a high-performance lithium-nickel-manganese-cobalt oxide (LNMCO) cathode material for power batteries and a preparation method thereof, and belongs to the technical field of lithium-ion battery (LIB) materials. The preparation method of an LNMCO cathode material of the present disclosure combines a melting and mixing method, a spray drying method, a sol-gel method, and a high-temperature solid-phase method to achieve thorough mixing of various components of a precursor, such that a prepared product has a uniform particle size, excellent electrochemical performance, and high cycling stability. The method has simple operation steps, low raw material cost, small time consumption, and high production efficiency, and can realize industrialized large-scale production. The present disclosure also provides an LNMCO cathode material prepared by the method, which has high specific charge/discharge capacity, thermal stability, and cycling stability.

Abstract: Disclosed is a PLGlu-SS-lithium ion-sieve composite, preparation method and use thereof. The PLGlu-SS-lithium ion-sieve composite includes an H3LiMnTi4O12 lithium ion-sieve and poly-?-glutamic acid (?-PGA) compounded with the H3LiMnTi4O12 lithium ion-sieve, where a terminal amino group of the ?-PGA is linked to a disulfide bond-containing group. In the present disclosure, the H3LiMnTi4O12 lithium ion-sieve is used as a support structure with sufficient strength support, high structural stability, and excellent cycling performance; the pores and surface of the H3LiMnTi4O12 lithium ion-sieve both are bonded with PLGlu-SS. At a low pH, PLGlu-SS is protonated and folded to form?-helix, and at a high pH, PLGlu-SS is deprotonated and extended. Thus, under alkaline adsorption and acidic desorption, a pore size of the composite can be adjusted to provide large adsorption capacity, high adsorption selectivity, and high adsorption efficiency.