5863results about "Battery recycling" patented technology

The invention relates to the technical field of battery recovery monitoring, in particular to a discharge crushing environmental data monitoring system for battery recovery. The system comprises a data acquisition module used for obtaining a sequence corresponding to each dimension based on environment data of different dimensions in the battery crushing equipment; the sample space construction module is used for screening the dimensions to obtain to-be-analyzed dimensions and constructing a sample space; the clustering analysis module is used for clustering the data points in the sample space to obtain clusters; judging whether the data points in each cluster are suspected abnormal data points or not; the abnormal degree acquisition module is used for clustering all the suspected abnormal data points in a time sequence to obtain a time sequence cluster and an abnormal degree; and the monitoring module is used for acquiring the comprehensive abnormal degree and judging whether the discharge breakage of the battery is abnormal or not based on the comprehensive abnormal degree. The condition of the old battery discharge crushing process can be accurately monitored.

The invention discloses a solid-phase sintering repair method of a waste lithium iron phosphate battery material, and relates to the related field of battery recovery and repair, and the method comprises the following steps: disassembling the waste lithium iron phosphate battery material, taking out a battery positive plate, cleaning, drying and separating a positive material; a spectrograph is adopted for component analysis, the element component content is determined, and raw material adding and supplementing are conducted based on the deviation value of the theoretical element proportion; based on the characteristic information, sectional type sintering scheme analysis is conducted, and solid-phase sintering repair scheme parameters are obtained; the mixed lithium iron phosphate powder is pressed into a sheet shape and placed in sintering equipment for solid-phase sintering repairing treatment, and a repairing sample is obtained; and obtaining test performance parameters according to a battery application detection standard, and performing repair compensation control on the repair scheme parameters. The technical problem that the repairing effect is uncontrollable due to lack of precise analysis and targeted optimization in existing solid-phase sintering repairing is solved, and the technical effects of efficient repairing and performance improvement are achieved.

The invention discloses a refined disassembly system and method for a battery monomer, and belongs to the technical field of battery disassembly. The production line comprises a perforating device, a cutting device, a cutting device, a scattering device, a sorting device, a color sorting device, a defluorination device and a powder removal device. The method comprises the following steps: perforating a battery to discharge electrolyte, separating a shell from an inner core by a cutting device, cutting the inner core by a cutting device, scattering by a scattering device, sorting a diaphragm by a sorting device, sorting positive and negative electrode materials by a color sorting device, and respectively removing fluorine by a defluorination device. And finally, the metal foil and the powder are separated through the powder removing device, the damage degree of the crystal structure of the black powder can be reduced, the black powder and the metal fragments are efficiently separated according to the density difference, the metal foil and the black powder are not likely to be excessively mixed, the separation purity is high, the secondary treatment situation is reduced, efficient separation and recycling of the electrode material are achieved, and the production cost is reduced. And the comprehensive function and the resource utilization rate of the system are obviously improved.

The invention discloses a refined disassembly and recovery production line for retired lithium batteries. Comprising an automatic battery feeding station, a battery pretreatment station, a battery discharging station, an electrolyte collecting station, a battery shell disassembling station, a roll core film removing station, a pole piece separating station, a pole piece conveying station, a crushing feeding station, a crushing station, a crushing conveying station, a first-stage separating station, a high-temperature drying station, a drying discharging station and a second-stage separating station. The automatic battery feeding station is connected with the battery pretreatment station, and the battery pretreatment station is connected with the battery discharging station. The refined disassembly and recovery production line for the retired lithium battery is provided with deep discharge equipment, the safety problem of electrified crushing or manual disassembly is avoided, full-process automation is achieved, the recovery efficiency is high, refined disassembly and recovery are achieved, an aluminum shell, a positive plate, a negative plate and a diaphragm are separated, the recovery rate and purity of valuable metal are improved, the production line process is short, and the production line cost is low. And no secondary pollution is generated.

The invention relates to a method for processing rechargeable batteries. The object of the invention described here is to provide a method for processing rechargeable batteries, via which rapid, resource-conserving, cost-effective, and sustainable reprocessing of a rechargeable battery is made possible. This is achieved by the method according to the invention in that the rechargeable battery is discharged, the discharged rechargeable battery is opened, the opened rechargeable battery is broken down into its single cells, and the condition of the single cells is checked.

The invention discloses a method for recovering lithium phosphate from lithium iron phosphate black powder. The method comprises the following steps: mixing black powder recovered from waste lithium iron phosphate batteries with sodium persulfate, and calcining; adding water into the obtained calcined product, dissolving, filtering to obtain water extract A and leaching residues, washing the leaching residues with water, and calcining at high temperature to obtain battery-grade iron phosphate; adding a sodium hydroxide solution into the water extract A, and reacting to obtain a water extract B; adding a trisodium phosphate solution into the water immersion liquid B, fully reacting, performing suction filtration to obtain lithium phosphate and filtrate, and cleaning and drying the lithium phosphate to obtain battery-grade lithium phosphate; and freezing and denitrifying the filtrate to obtain a denitrified solution, and adding the denitrified solution into the sodium hydroxide solution for recycling. The method does not generate wastes, recycles the filtrate in the whole process, theoretically realizes zero loss of the lithium element, prevents the iron element from entering the solution, simplifies the preparation steps of the lithium phosphate, and has the advantages of cost reduction and environmental protection.

The invention discloses a waste lithium battery electrolyte waste gas treatment device and method, and relates to the field of waste lithium battery electrolyte waste gas treatment. The waste lithium battery electrolyte waste gas treatment device comprises a box frame, a filter box is fixedly connected to the box frame, a dust falling hopper is arranged on the filter box, a gas inlet pipe is fixedly connected to the dust falling hopper, a gas purification box is fixedly connected to the filter box, a gas outlet pipe is fixedly connected to the gas purification box, and dust removal cloth bags which are evenly distributed are fixedly connected to the bottom wall of the gas purification box. The upper end of the dust collecting bag is fixed and suspended in the inner cavity of the filter box. The problem that dust at the bottom of the bag is difficult to clean is solved through the dust cleaning mechanism, and the efficiency and service life of the dust collecting bag are improved; during dust removal, the plugging frame opens the bag bottom, accumulated dust is removed in cooperation with high-pressure injection, and sticky dust is prevented from forming a'dead zone '; the cloth bag is loosened to enhance the vibration effect and improve the dust stripping rate; the process is automatic, resistance is reduced, the operation period is prolonged, and complex waste gas purification is facilitated.

This invention discloses a method for leaching lithium iron phosphate mixed powder with iron salts and recovering all components, belonging to the field of battery recycling. The invention uses an iron salt solution to leach the mixed powder, obtaining a lithium-containing leachate and leaching residue. Ferrous ions in the leachate are regenerated into ferric iron through acidification and oxidation, and recycled for leaching the next batch of mixed powder. After reaching a preset number of cycles, the leachate is used for re-leaching multiple batches of leaching residue to improve the lithium leaching rate. Ultimately, a enriched solution containing Li, Fe, Cu, and Al and graphite-containing iron phosphate residue are obtained. Copper is recovered from the enriched solution through iron powder replacement, and a high-purity lithium chloride solution is obtained through extraction and separation, while ferric chloride (recycled) and aluminum chloride crystals are also recovered. The leaching residue is treated with hydrochloric acid to obtain regenerated graphite, and the pH is adjusted with alkali to obtain high-purity iron phosphate. This method achieves full component recovery under mild conditions, reducing separation steps and chemical consumption through a "leaching-regeneration-leaching" cycle mechanism, thus achieving both environmental and economic benefits.

The invention provides a method for recycling lithium iron phosphate, which comprises the following steps: S1, obtaining lithium iron phosphate black powder, and washing the lithium iron phosphate black powder by using alkali liquor to obtain aluminum-removed black powder and aluminum-containing lithium filtrate; s2, the aluminum-removed black powder is subjected to acid leaching treatment with acid liquor, and acid leaching liquor is obtained; s3, carrying out reduction precipitation treatment on the acid leaching solution by using a composite reducing agent to obtain a copper-removed leaching solution and solid-phase copper-containing slag; s4, adding a phosphorus source and an oxidizing agent into the copper-removed leaching solution, adding alkali to adjust the pH value, and carrying out oxidation precipitation treatment to obtain iron phosphate precipitate and a first lithium-containing solution; and S5, adjusting the pH value of the aluminum-lithium-containing filtrate in the step S1 by using an acid solution to obtain aluminum filter residues and a second lithium-containing solution. According to the method, iron phosphate with relatively high purity can be obtained; meanwhile, the obtained first lithium-containing solution and the second lithium-containing solution are relatively low in impurity ion content and can be used for obtaining a lithium salt product with relatively high purity.

The invention provides a method for recovering a lithium iron phosphate material from a waste battery, and relates to the technical field of battery material recovery. The method comprises the following steps: pre-treating the waste battery; treating a positive plate; and material recovery. Wherein the positive plate treatment specifically comprises the step of soaking the positive plate by adopting a first soaking agent. And crushing the positive plate soaked in the first soaking agent. Soaking the crushed positive plate in a second soaking agent, and filtering to obtain a first filter residue taking the positive active material as a main component; and drying, grinding and screening the first filter residue to remove impurities so as to obtain the lithium iron phosphate impurity-removed material. According to the method for recovering the lithium iron phosphate material from the waste battery, provided by the invention, impurities in the recovered lithium iron phosphate material can be reduced, and the purity of the recovered lithium iron phosphate material is increased; the performance of the lithium iron phosphate material synthesized again after the lithium iron phosphate in the waste battery is recycled can meet the brand-new battery-grade raw material requirement.

The invention discloses a calcining carbon removal-supercritical expansion stripping method for regenerating graphene from graphite of a waste lithium battery, and belongs to the field of lithium battery recovery and nano material preparation. Comprising the following steps: treating the waste lithium battery to obtain waste lithium battery positive and negative electrode mixed powder, and then roasting to obtain battery powder; leaching the battery powder in a nitric acid solution to obtain purified graphite slag; the method comprises the following steps: mixing graphite slag with supercritical gas fluid, treating, quickly releasing pressure to normal pressure, and separating to obtain graphene. According to the method, on the basis of interlayer structure characteristics of the waste graphite negative electrode, organic matters and amorphous carbon are removed through multi-stage calcination, a supercritical N2 / CO2 mixed fluid permeation and pressure relief expansion synergistic stripping technology is combined, and low-damage dissociation is achieved through graphite microcracks. According to the method, physical stripping and liquid nitrogen shock cooling strengthening are coupled, and the obtained graphene sheet layer is high in integrity and few in structural defect and can be directly used for manufacturing conductive composite materials and energy storage devices.

The present application discloses a method for recycling and preparing lithium iron phosphate from waste lithium iron phosphate batteries, which comprises the following steps: oxidizing and acid-leaching the recycled lithium iron phosphate battery powder to obtain acid-leached lithium solution and iron-phosphorus filter residue; adjusting the pH of the acid-leached lithium solution for purification and concentration, adding a phosphorus source and adjusting the pH to 9.5 - 10.5 to obtain solution A; subjecting the iron-phosphorus filter residue to secondary acid-leaching, iron dissolution, adding a phosphorus source and adjusting the pH to 6.5 - 7.5 to obtain solution B; mixing solution A and solution B for coprecipitation reaction, and filtering to obtain lithium iron phosphate precursor and reaction mother liquor; subjecting the lithium iron phosphate precursor to anaerobic drying, mixing with a carbon source and sintering to prepare a carbon-coated lithium iron phosphate cathode material. The method provided by the present application has the advantages of short recycling path, few reaction by-products and environmental friendliness, and can recycle all components of lithium, iron and phosphorus in the waste lithium iron phosphate battery powder. At the same time, the by-product is ammonium sulfate, a high-quality fertilizer raw material, which has great application prospects.

The invention relates to a process for recycling and regenerating a waste lithium iron phosphate positive electrode material by using a specific chelating agent. The method comprises the following steps: carrying out heat treatment on a waste lithium iron phosphate positive electrode material, putting separated waste lithium iron phosphate powder into a ball milling tank, adding organic acid and a chelating agent, and carrying out ball milling; after the ball milling is finished, adding hydrogen peroxide, uniformly stirring and mixing, adjusting the pH value to 2-3 by using nitric acid, and filtering to obtain a filter cake which is iron phosphate; adding saturated sodium carbonate into the filtrate, precipitating, and recovering lithium carbonate; putting the iron phosphate, the lithium carbonate, the iron source, the lithium source and the phosphorus source in the step S3 into a ball mill for ball milling, and performing high-temperature solid-phase sintering after ball milling to obtain a regenerated lithium iron phosphate material; the chelating agent disclosed by the invention is prepared from (9ci)-2-(2-propenyl)-1-cyclopentene-1-carboxylic acid, 2-mercaptobenzimidazole carboxylic acid, an ethylene boric anhydride pyridine complex and potassium persulfate. The regenerated lithium iron phosphate material prepared by the method has excellent electrochemical performance.

The invention relates to the technical field of retired ternary power battery recovery, and particularly discloses a method for preferentially extracting lithium and recovering valuable metals from a retired ternary lithium battery and application of the method. According to the method, the traditional process is broken through the preferential lithium extraction, and efficient recovery of lithium, Ni, Co and Mn is realized by utilizing'fast-medium-slow 'multi-stage cooperation of a composite reducing agent and accurate adaptation of roasting and leaching parameters, so that the method has the advantages of low cost, high efficiency, low energy consumption and the like, and is suitable for large-scale industrial production. The method is low in energy consumption and environment-friendly, and is applied to resource recycling of the retired ternary lithium battery, and the precursor can be used for reproducing a positive electrode material or used for a catalytic material.

The invention discloses a waste lithium battery classification processing method and system based on image segmentation identification, and relates to the technical field of waste lithium battery recycling, and the method comprises the steps: configuring a high-resolution camera, a lighting device and an ambient light sensor, collecting multi-view images of waste lithium batteries in real time, obtaining a two-dimensional image data set, and carrying out the recognition of the two-dimensional image data set; inputting the two-dimensional image data set into an SIFT algorithm to detect and match feature points, generating a three-dimensional model through an MVS technology based on the matched feature points, and obtaining geometric information of the surface of the battery by using a triangulation method; according to the method, the high-quality three-dimensional model is generated by combining high-resolution multi-view image acquisition with SIFT feature point matching and the MVS technology, and the quality of the model is optimized through denoising, curvature enhancement and dynamic parameter adjustment, so that accurate modeling of a complex geometrical shape is ensured. And the optimized three-dimensional model is analyzed by using the deep convolutional neural network, so that the robustness and accuracy of defect detection are greatly improved.

The present invention relates to the technical field of battery recycling equipment, and in particular to a discharge device for recycling waste lithium batteries. The hoisting assembly includes winches arranged at intervals on a mounting frame, the ropes of the winches slide through the mounting frame, and the ends of the ropes of the winches are respectively connected to immersion frames, and the immersion frames are loaded with placement frames for placing batteries. Through the coordinated operation of the hoisting assembly, the loading and unloading assembly and the deployment assembly, differentiated discharge treatment of waste lithium batteries is achieved; by using the winch and the multi-stage telescopic cylinder in conjunction with the independent immersion frame and placement frame structure, targeted discharge can be performed on batteries with different remaining power conditions; at the same time, the loading and unloading assembly supports the independent transportation of batteries before and after discharge, providing guarantees for continuous and batch operations, and the deployment assembly can adjust the brine ratio in real time to ensure a consistent electrolyte environment during the discharge process, thereby improving the stability of the discharge effect and the resource recovery rate.

The invention discloses an intelligent sorting method and device for a positive electrode material of a retired lithium ion battery based on a spectrum method, and the device is connected in series with a pretreatment module, a cleaning module, an identification module and a sorting module through a conveying belt in a supporting module to form an automatic sorting assembly line. Pre-treating the retired battery to obtain a clean positive plate; an X-ray fluorescence spectrophotometer in the recognition module collects the spectrum of the positive plate and transmits the spectrum to an industrial personal computer, and the spectrum is preprocessed and then input into a classifier library; the classifier library comprises a main classifier and an increment classifier based on element and spectral shape dual channels, if the output confidence reaches a preset threshold value, the material category is judged, otherwise, the spectrum is temporarily stored as an unknown spectrum; after unknown spectrums are accumulated to a set number, new categories are identified through a clustering algorithm, and a lightweight dichotomy increment classifier is trained and added into a classifier library; and the sorting module drives the hydraulic pushing hand to sort the positive plates according to the identification result. Through cooperative evolution of the main classifier and the increment classifier, the sorting precision is effectively improved.

The present application discloses a method for recovering battery-grade iron phosphate and lithium salts from lithium iron phosphate waste materials and its application, comprising the following steps: S100, dissolving the lithium iron phosphate waste materials with a phosphoric acid solution, filtering to obtain a waste material dissolution solution; S200, adding an acid solution and an oxidant to the waste material dissolution solution to obtain a crystallization stock solution; S300, diluting the crystallization stock solution with water until its pH value is 1.0 to 1.5, and performing high-temperature crystallization to obtain hydrated iron phosphate and a lithium-containing filtrate; S400, roasting the hydrated iron phosphate to obtain battery-grade iron phosphate; S500, removing water from the lithium-containing filtrate to obtain solution a, circulating solution a to dissolve the lithium iron phosphate waste materials, and concentrating to obtain lithium salts. The present application uses a phosphoric acid solution as the leaching solvent, does not require the use of an alkali solution subsequently and can be leached cyclically, improving the economic benefits while enabling the efficient recovery of all elements of Li, Fe, and P, and also capable of obtaining a battery-grade iron phosphate product with an iron-to-phosphorus ratio meeting the requirements.

The invention provides a method for recycling a waste lithium iron phosphate battery positive electrode material based on organic solvent soaking. The method comprises the following steps: mixing waste lithium iron phosphate positive electrode material powder and a crown ether chelating type co-dissolving agent to obtain a leaching solution; hydrogen peroxide is added into the leachate, the pH is adjusted, a diammonium hydrogen phosphate solution is added, and iron phosphate and filtrate containing lithium ions are obtained; adding sodium carbonate into the filtrate containing lithium ions, and adjusting the pH value to obtain lithium carbonate; mixing the iron phosphate with a phosphoric acid solution to obtain purified iron phosphate; and mixing the purified iron phosphate, lithium carbonate and acetylene black to obtain the regenerated lithium iron phosphate positive electrode material. According to the method for recycling the positive electrode material of the waste lithium iron phosphate battery based on soaking of the organic solvent, the leaching rate of the lithium element is effectively increased, the selectivity to other metal ions is low, and the regenerated positive electrode material of the lithium iron phosphate battery has relatively high discharge capacity and good cycling stability.

The invention relates to the technical field of battery disassembly and recovery, and discloses a power battery disassembly path optimization method based on an autoregression generation strategy. The method comprises the following steps: acquiring multi-source data of a to-be-disassembled battery, normalizing the multi-source data, inputting the normalized multi-source data into a multi-decoding-layer Transform model, performing dimension reduction processing on the battery data by the multi-decoding-layer Transform model, performing splicing fusion processing to obtain fusion characteristics, acquiring a task ID and a score of the to-be-disassembled battery according to the fusion characteristics, and storing the task ID and the score of the to-be-disassembled battery. The next step of disassembly of the battery is completed according to the score and the task ID; and based on an autoregressive generation strategy, repeatedly taking the task ID and the fusion feature obtained this time as the input of the multi-decoding-layer Transformer model, and obtaining the score and the task ID for the next disassembly of the battery until the disassembly of the battery is completed. The problem that an optimal path cannot be effectively planned through optimization of an existing battery disassembling path method is solved.

The invention discloses a method for comprehensively recovering valuable elements from a waste lithium iron phosphate battery material. The method comprises the following steps: carrying out alkali leaching on black powder and / or pole piece materials of the waste lithium iron phosphate batteries, and then carrying out solid-liquid separation to obtain alkali leaching residues and an alkali leaching solution; carrying out acid leaching on the alkaline leaching residues, and then carrying out solid-liquid separation to obtain an iron oxide powder product and an acid leaching solution; the alkali leaching liquid is cooled and crystallized to obtain a sodium phosphate product and crystallization mother liquor, and the crystallization mother liquor can be circularly used for the alkali leaching process; adjusting the pH value of the acid leaching solution, precipitating and separating to obtain a lithium phosphate product and a lithium precipitation mother solution, wherein the lithium precipitation mother solution can be used for preparing a sodium sulfate product. The method can effectively separate iron, phosphorus and lithium products, and is high in recovery rate, simple, short in process, low in cost and suitable for industrial application.

The invention provides a method for extracting valuable metals in waste lithium ion batteries by using a deep-eutectic solvent and a method for regenerating a positive electrode material, which are used for extracting the valuable metals in the waste lithium ion batteries and regenerating the positive electrode material by using the deep-eutectic solvent with specific composition as a leaching agent. Comprising the following steps: preparation of a eutectic solvent, acquisition of a waste positive electrode material, leaching of valuable metals from the eutectic solvent, regeneration and recycling of the eutectic solvent, recovery of transition metal elements, recovery of a lithium element, re-preparation of the positive electrode material and the like. According to the method for extracting the valuable metal of the waste lithium ion battery through the eutectic solvent and the regeneration method of the positive electrode material, the high-temperature and long-time requirements of an existing eutectic solvent leaching process can be effectively met, and the subsequent metal recovery step is remarkably simplified and even reconstructed; and short-process, low-energy-consumption and low-cost closed-loop regeneration of the positive electrode material of the waste lithium ion battery is realized.

The invention discloses a waste lithium battery pack recovery residual value evaluation system, and the system comprises an appearance screening module which is used for scanning to obtain battery pack shell data and electrode connection integrity data, and dividing a lithium battery pack into a complete battery pack and a damaged battery pack; the residual value grading evaluation module constructs a complete battery pack evaluation model, and divides a complete battery pack into a directly reusable battery and a to-be-disassembled complete battery based on a residual value evaluation result; the disassembly scheme generation module evaluates the damaged battery pack and generates a disassembly scheme based on the three-level disassembly decision tree; the material value classification module divides a to-be-disassembled complete battery and a damaged battery pack into batteries with high recovery value and batteries with low recovery value; and the comprehensive residual value evaluation module adds a weight value to the obtained residual value evaluation result to obtain a comprehensive residual value evaluation result. The method has the advantages that efficient and accurate battery recovery and maximum utilization of resources are realized through appearance screening and disassembly scheme generation in combination with material value analysis and market dynamic adjustment.

A crushing apparatus for treating waste lithium batteries, comprising a supporting bottom plate (1). A crushing box (2) is provided above the supporting bottom plate, a fixing plate (8) is provided below the crushing box, a supporting block (4) and two fixing blocks (6) are fixedly connected to the upper surface of the supporting bottom plate, a threaded rod (10) is rotatably connected between the supporting block and the supporting bottom plate, a screening box (9) is provided above the fixing plate, and a vibration motor (21) is fixedly mounted on the left surface of the screening box. When it is necessary to crush waste lithium batteries, a first motor (5) is started, an output shaft of the first motor drives the front gear among two gears (15) to rotate, the two gears mesh with each other in the rotation process, and at the moment, two crushing rollers (3) fixedly connected to the two gears also rotate accordingly. The two crushing rollers rotate towards each other to effectively crush the waste lithium batteries, the slag obtained by crushing falls into the screening box provided below for conveyance, and a screening mesh (17) is provided in the screening box. The screening efficiency can be improved by means of the vibration of the vibration motor, and the distance between the crushing box and the screening box can be adjusted according to needs.

The invention relates to the field of lithium battery disassembly, in particular to a fine disassembly device and process for a square single lithium battery cell. A fine disassembling device for square single lithium battery cells comprises a workbench, a vertical cutting mechanism, a transverse cutting mechanism, an end cover falling mechanism, a pushing mechanism and a side cutting mechanism, and the workbench is composed of supporting legs and a table top; the vertical cutting mechanism is arranged on the left side of the top of the workbench and provided with two conveying structures which are vertically and symmetrically installed in the downward conveying process of the square single lithium batteries. A square single lithium battery is driven by the vertical cutting mechanism to be conveyed downwards, in the conveying process, a shell of an end cover is vertically cut, the square single lithium battery subjected to vertical cutting enters the transverse cutting mechanism, the transverse cutting mechanism conveys the square single lithium battery to the right side, and in the conveying process, the transverse cutting mechanism conveys the square single lithium battery to the right side. And the shell of the end cover is transversely cut, and after the end cover is cut, the end cover is continuously conveyed to the right side.

The invention discloses a diaphragm sorting device for waste lithium battery recycling, and relates to the technical field of diaphragm sorting, the diaphragm sorting device for waste lithium battery recycling comprises a shell, a screening assembly, a winnowing assembly and an adsorption separation assembly.Large particles, medium particles and light materials are screened out through small screen holes, medium screen holes and large screen holes in a screen, and when the screen reciprocates up and down, the large particles and the medium particles are separated; the two symmetrically-arranged baffles are driven by the connecting rod to conduct continuous opening and closing actions, periodic opening and closing are achieved, the opening and closing frequency of the baffles is synchronous with the vibration frequency of the screen, dynamic control over falling materials is formed, it can be ensured that the materials falling every time are single-layer particles, multi-layer accumulation is avoided, and when the single-layer materials fall, the particles are evenly distributed in the vertical direction, and the quality of the particles is improved. Air flow can vertically act on each particle conveniently, the situation that bottom layer particles in multiple layers of materials cannot be effectively separated due to insufficient air flow penetration is avoided, and the screening precision is remarkably improved through linkage control of screen vibration and the baffles.

The invention relates to the technical field of battery pole piece recovery, in particular to a waste lithium iron phosphate battery positive pole piece physical dry recovery method which comprises the following steps: fragmenting waste lithium iron phosphate battery positive pole pieces, carrying out electromagnetic separation, and sequentially carrying out low-temperature embrittlement treatment and two-stage mechanical dissociation, a dissociation material obtained by separating the black powder, the current collector and the high-molecular binder is obtained; then, two-stage screening is adopted, fine black powder smaller than 50 micrometers is obtained through screening, the binder in the fine black powder is fused through pulse hot air and enters a hollow porous ceramic roller along with airflow, the fused binder is adsorbed to the outside of the roller through micropores of the porous ceramic roller according to the surface energy difference, and therefore the binder is removed and recycled; and finally, airflow separation is carried out, and a black powder product and current collector chippings are obtained through separation. According to the method, chemical pollution and high-temperature damage can be avoided, accurate separation of the black powder, the aluminum foil and the binder is efficiently achieved, and the purity of the black powder product is 99% or above.

A method for recovering active metals of a lithium secondary battery may supply a cathode active material mixture to a fluidized bed reactor including a reactor body. A reaction gas may be introduced from a lower portion of the fluidized bed reactor to form a fluidized bed including a preliminary precursor mixture within the reactor body. The fluidized bed portion that has entered the upper portion of the fluidized bed reactor may be cooled to descend it into the reactor body, and then a lithium precursor may be recovered from the preliminary precursor mixture. Accordingly, a terminal velocity of the preliminary precursor is reduced, such that even if the particle size of the preliminary precursor is fine, loss due to scattering may be prevented.

The invention relates to a waste ternary lithium ion battery black powder treatment method which comprises the following steps: in the presence of a reducing agent, carrying out acid leaching on waste ternary lithium ion battery black powder to be treated to obtain a leaching system; mixing the leaching system with iron powder, and reacting to obtain copper-removed ore pulp; and waste ternary lithium ion battery black powder is added into the copper removal ore pulp, the pH value of a reaction system is made to be 4-6, solid-liquid separation is carried out after reaction, and liquid with iron and aluminum removed and black powder filter residues are obtained. According to the treatment method, the technological process is short, production equipment can be simplified, the treatment cost is reduced, meanwhile, the recovery efficiency of valuable metal such as nickel, cobalt, manganese and lithium is effectively improved, the recycling value of black powder treatment is improved, and remarkable technical and economic advantages are achieved.

A heavy object accommodation apparatus includes a frame assembly storing plural heavy objects at multiple levels in a height direction; plural pillar members extending in the height direction; and a pair of attachments extending substantially horizontally between pillar members arranged in a front-rear direction of the frame assembly and the pair of attachments supporting two end portions in a width direction of a heavy object, the width direction being substantially orthogonal to an insertion and removal direction of the heavy object at the apparatus. Each of the attachments includes a longer side portion and a shorter side portion extending in two directions, each of which is substantially orthogonal to the extension direction of the attachment, dimensions of the longer side portion and the shorter side portion in the two directions are different, and the longer and the shorter side portions are fixable to the pillar members and the heavy object.