1118 results about "Material recycling" patented technology

The present disclosure generally relates to collecting, handling, and / or sorting of waste or other objects. For example, certain embodiments are generally directed to systems and methods for collecting and sorting objects such as trash, recyclables, compostables, etc. In some cases, such systems may be used at a MRF (materials recovery facility), a transfer station, a public facility, or other locations where various objects in a waste stream are to be sorted. In some cases, the system may be relatively small and compact. The waste stream may be singulated or separated into discrete objects to facilitate identification and sorting. For example, two or more discrete objects within the waste stream that are contacting one another or are proximate to one another may be separated, so as to facilitate identification and / or sorting of the objects. This may be useful, for example, for producing less contaminated streams of trash, recyclables, compostables, etc. from a waste stream.

The invention provides a high-value recovery method and device for a retired double-glass photovoltaic module. The high-value recovery method comprises the four steps of lossless disassembly of a frame and a junction box, gradient separation of double-sided glass, segmented pyrolysis of inert gas and material sorting. On the basis of gradient pyrolysis and flexible separation and recovery technologies, nondestructive recovery of the double-sided glass is realized, and complete separation of the double-sided glass is realized by gradient heating and flexible stripping technologies; high-value battery pieces are reserved, and thermal damage is avoided through segmented pyrolysis and ultrasonic vibration; resources are circulated in a closed-loop mode, the reutilization rate of glass, battery pieces and welding strips is high, and the retired double-glass assembly can achieve all-material closed-loop recycling.

The invention provides a metal material recycling device and a method for leaching fluorine beryllium thallium and lithium rubidium cesium in lithium slag. Relates to the field of metal material recycling, and comprises a leaching tank placed on the ground through four supporting frames, the top of the leaching tank is fixedly provided with a top cover, and the bottom of the leaching tank is fixedly provided with a bottom cover. According to the metal material recycling device and the leaching method for fluorine beryllium thallium and lithium rubidium cesium in the lithium slag, the ultrasonic generator is arranged to supply energy to the first ultrasonic transducer and the second ultrasonic transducer to generate ultrasonic waves, the ultrasonic waves generate microjet flow to impact the surface of minerals, acid liquor permeation and ion diffusion are accelerated, the leaching time is shortened, and the efficiency is improved; the surface of the lithium slag is not prone to passivation, the leaching rate of target metal ions is increased, the leaching liquid is pumped out through the water suction pump, manual contact with the leaching liquid in the next solid-liquid separation procedure is facilitated, dilute sulfuric acid is supplemented through the acid supplementing pipe, then the lithium slag is placed through the funnel, and the consistency and controllability of starting of the leaching reaction are guaranteed.

The invention relates to a method for catalytically degrading a polyester material by using an ionic liquid and application of the polyester material, and mainly solves the technical problems of high energy consumption, environment unfriendliness and complex process in polyester material recovery research in the prior art. According to the technical scheme, the novel method for catalytically degrading the polyester material through the ionic liquid comprises the steps that the ionic liquid is used as a catalyst, diol is used as an alcoholysis agent, polyester is catalytically degraded, and the ionic liquid has the following general formula: A + B-(I); in the formula, A < + > is an organic alkali cation, and B <-> is an alkoxy anion, the problem is well solved, and the method can be applied to polyester recovery industry.

The invention belongs to the technical field of lithium ion battery material recovery, and discloses a regeneration, repair and doping method of a waste lithium iron phosphate material and a regenerated positive electrode material. The method comprises the following steps: firstly, immersing waste LiFePO4 powder into a mixed solution of citric acid and ascorbic acid, oscillating to selectively dissolve out Fe < 3 + > impurities, and synchronously reducing Fe < 3 + > on the surface to Fe < 2 + >; then Li2CO3 is added into the leached powder for lithium bit compensation, and ball milling and uniform mixing are carried out; then Al2O3 and TiCl3 are added for aluminum-titanium co-doping, and ultrasonic dispersion is carried out uniformly; and finally, carrying out segmented sintering. In the first stage, sintering is carried out in an air atmosphere at 300-350 DEG C; in the second stage, sintering is performed at 600-700 DEG C in an inert gas atmosphere; and finally obtaining the regenerated positive electrode material. According to the method, waste lithium iron phosphate batteries can be turned into wealth, the lithium iron phosphate positive electrode material with good electrochemical performance is obtained, the complex and expensive impurity removal process is omitted, the cost is low, and possibility is provided for large-scale industrial regeneration and repair of waste lithium iron phosphate active substances.

The invention discloses a fiber-reinforced thermoplastic resin-based composite material based on dynamic reversible interface interaction and a preparation method and a recycling method thereof. The fiber-reinforced thermoplastic resin-based composite material comprises a modified thermoplastic resin matrix and a modified fiber reinforcement which are compounded with each other, the modified thermoplastic resin matrix and the modified fiber reinforcement are bonded and connected through dynamic bonds with dynamic reversible interface interaction. Through construction of dynamic reversible interface interaction in the fiber-reinforced thermoplastic resin-based composite material, infiltration compounding and interface bonding between a fiber reinforcement and a high-viscosity thermoplastic resin melt can be enhanced, and interface debonding and total-value recycling of the fiber reinforcement in the composite material recycling process can be effectively promoted; therefore, the bottleneck problems of poor wettability in the forming process, low bonding fastness at a heterogeneous interface, insufficient mechanical properties, low waste recovery value and the like confronted by the development of the fiber-reinforced thermoplastic composite material are effectively solved.

The invention provides a high-compaction lithium iron phosphate positive electrode material and a preparation method thereof, and belongs to the field of recycling and repairing of lithium ion battery materials. The method comprises the following steps: step 1, dispersing iron phosphate, lithium carbonate, glucose, polyethylene glycol PEG and titanium dioxide into water to form first slurry; step 2, sanding the first slurry to a first predetermined particle size requirement, and then performing spray drying to obtain first solid powder; 3, roasting the first solid powder to obtain a sample A; step 4, dispersing iron phosphate, lithium carbonate, glucose and PEG into water to form second slurry; step 5, sanding the second slurry to a second predetermined particle size requirement, and then performing spray drying to obtain second solid powder; step 6, roasting the second solid powder to obtain a sample B; and step 7, mixing the sample A and the sample B, carrying out size mixing, carrying out sand milling, controlling to a third preset particle size requirement, carrying out spray drying, then carrying out roasting, and carrying out airflow crushing to obtain the high-compaction lithium iron phosphate positive electrode material.

The invention belongs to the technical field of lithium battery material recovery, and particularly relates to a method for recovering a waste lithium iron phosphate positive electrode material. The method comprises the following steps: (1) grinding and sieving the positive electrode material of the waste lithium iron phosphate battery, mixing with an alkaline solution, stirring and leaching, and carrying out solid-liquid separation to obtain a lithium-rich solution and leaching residues; (2) introducing a saturated sodium carbonate solution into the obtained lithium-rich solution, carrying out heating reaction, filtering, taking a solid phase, and drying to obtain lithium carbonate; and the obtained leaching residues are dried, and ferroferric oxide is obtained. According to the method, the waste lithium iron phosphate battery positive electrode material is leached through the alkaline liquid phase, it can be guaranteed that lithium and iron in waste lithium iron phosphate are separated through a one-step leaching method, and therefore selective lithium extraction is achieved. The whole technological process is convenient to operate, mild in reaction condition and low in energy consumption, does not need to use any acid or oxidant, avoids generation of a large amount of waste liquid and harmful gas, and is high in selective lithium extraction efficiency.

The application discloses a preparation device for regenerated colored lycra fabric fibers, belongs to the technical field of clothing fiber recycling equipment, and solves the problems of low impurity removal rate, poor cutting effect and low efficiency in the prior art. The device comprises a conveying device, which is used for feeding materials and conveying the materials into a cleaning device. The cleaning device is used for cleaning the materials. A recycling device is used for recycling the materials. The cleaning device is arranged below the output end of the conveying device. The recycling device is arranged at the side of the cleaning device. A transfer device is further arranged above the cleaning device and the recycling device. The application cleans the materials in the basket through the cleaning device, effectively removes dust and other impurities on the materials, improves the quality of material recycling, and increases work efficiency. The material is dried in the drying device first, and then cut and crushed for recycling, so that the cutting effect is ensured and the work efficiency is high.

The invention discloses a preparation method and application of an aminated MIL-101 (Cr) material for enhancing adsorption of perfluorinated compounds, relates to the technical field of metal organic framework materials, and aims to enhance the adsorption effect of the aminated MIL-101 (Cr) material on the perfluorinated compounds. The preparation method comprises the following steps: taking MIL-101 (Cr) as a skeleton raw material and tris (2-aminoethyl) amine as an amination raw material, and then synthesizing and modifying to prepare the MIL-101 (Cr)-TAEA, the average pore size of which can be more than 7 times of that of the MIL-101 (Cr); the MIL-101 (Cr)-TAEA can be applied to removal of perfluorinated compounds in water, and after four times of cyclic regeneration, the total removal rate of PFASs is reduced by less than 5% compared with that of first adsorption; the preparation steps are simple and easy to operate, the raw materials are easy to obtain, the preparation cost is low, the average pore size of the prepared aminated MIL-101 (Cr) material is greatly increased, the flexibility of the material is enhanced, the adsorption performance on perfluorinated compounds is good, the saturation adsorption capacity is high, and the cyclic regeneration performance of the material is excellent.

The invention belongs to the field of aluminum-based composite material recycling, and particularly relates to an aluminum-based composite material machining chip recycling method which comprises the steps that oil stains and floating dust on the surfaces of machining chips are removed, and the machining chips are crushed into sheets; carrying out alkali washing and acid washing cleaning to remove an oxide layer; determining a reinforced phase mass fraction through pickling; stirring the flaky material, and performing gravity settling to obtain particles arranged in parallel; performing low-temperature vacuum sintering to obtain a billet; and the aluminum-based composite material with high interface bonding strength and good uniformity is prepared through high-temperature plastic deformation. And the particle reinforced aluminum matrix composite material processing chips are recycled, so that the machining loss is reduced. And the oxide layer is removed, and the particle sintering difficulty is reduced. And the processing chips are arranged in parallel, so that the problems that the sheet-shaped aluminum-based composite material particles are not dense in hot pressing and easy to generate pores due to high strength are solved, and a new scheme is provided for recycling and reusing the composite material.

The utility model relates to the technical field of UTG glass cutting, and discloses a UTG glass raw material production cold section cutting production line, which comprises a transverse cutting conveying mechanism, a transverse cutting mechanism, a transverse cutting mechanism and a transverse cutting mechanism, the longitudinal cutting mechanism is used for longitudinally cutting according to requirements; the splitting mechanism is arranged on the right side of the transverse cutting and conveying mechanism and used for separating the cut UTG glass; the cracked ear material conveying mechanism is arranged on the right side of the splitting mechanism and is used for separating ear materials from the cut glass and conveying finished products away; the transverse cutting conveying mechanism comprises a first rack, and a plurality of first sliding rails are arranged at the top of the first rack at equal intervals. According to the utility model, through the transverse follow-up cutting, the longitudinal high-precision cutting and split piece separation, the dust collection assembly and the automatic variable-width conveying technology, the cutting efficiency and precision are improved, the split piece separation smoothness, the dust treatment capacity and the offcut recovery capacity are optimized, and the problems of low efficiency, poor precision, serious pollution and incomplete offcut treatment in the prior art are solved.

The invention relates to the technical field of battery material recovery, and particularly discloses a method for efficiently recovering lithium and ferrous sulfate heptahydrate in retired lithium iron phosphate through total leaching and green impurity removal. Comprising the following steps: 1, adding strong base and a carbon source into black powder, and calcining at high temperature in an inert atmosphere; step 2, dissolving in pure water after calcining, and carrying out suction filtration to obtain a lithium salt solution and ferrous hydroxide; 3, sulfuric acid is added into ferrous hydroxide for suction filtration, and graphite and a ferric salt solution are obtained; drying the ferric salt solution to obtain ferrous sulfate heptahydrate; step 4, adding alkali into the lithium salt solution to obtain a purified lithium salt solution; 5, introducing carbon dioxide into the purified lithium salt solution, and adding alkali to generate lithium carbonate precipitate; and 6, finally carrying out heat preservation, suction filtration, washing and drying to obtain a lithium carbonate finished product. The technical problems that in the prior art, a traditional decommissioned lithium iron phosphate battery grading recycling technology is complex in production process, more waste liquid pollution is generated, and the production cost is relatively high are solved.

The invention relates to the technical field of energy-saving crushing, and discloses a material returning device for non-woven fabric production, the material returning device comprises a crusher shell, crushing rollers, a servo motor and a feeder, the crushing rollers are symmetrically and rotatably connected to the interior of the crusher shell, the servo motor is mounted on the outer side of the crusher shell, and the crushing rollers are driven by the servo motor; the anti-blocking and anti-winding assembly comprises removing columns, the removing columns are rotationally connected into the crusher shell, and the number of the removing columns and the number of the crushing rollers are both two. Non-woven fabric waste is limited in an effective crushing area in the middle of the crushing roller through the guide blocks on the inner walls of the limiting feeding plates, so that the waste is prevented from diffusing towards shaft heads at the two ends of the crushing roller, and the winding risk is reduced from the source; secondly, the removing column synchronously rotates along with the crushing roller and is located in the rotating path of the crushing roller, residual fibers on the surface of the crushing roller can be scraped off in real time, and fiber accumulation is prevented from forming a winding foundation; and the double structure reduces the rotation resistance of the crushing roller.

A system and process for sorting and recovery of recyclable materials, and in particular, sorting and recovery of recyclable materials from mixed waste comprising municipal solid waste in a materials recovery facility or “MRF” are provided. Advanced technology and machinery are integrated into a multi-step system and process that are designed to treat contaminated MSW streams to meet or exceed minimum material quality specifications while also reducing and minimizing headcount of sorter personnel. Because the mix of materials in MSW can be so varied and unpredictable, the system and process are designed to effectively sort and recover desired materials from MSW streams having a variety of material compositions.

The invention relates to the technical field of high polymer material recycling, and discloses a composite material prepared from recycled PC (polycarbonate), which comprises the following components in parts by mass: 95-100 parts of recycled PC; 10 to 20 parts of a reactive toughening agent with a maleic anhydride functional group; 0.5 to 2.0 parts of a furan functionalization reagent; 2 to 8 parts of a bismaleimide cross-linking agent; 0.5 to 1.0 part of a compound stabilizer; the reactive toughening agent with the maleic anhydride functional group is a maleic anhydride grafted styrene block copolymer; the maleic anhydride grafted styrene block copolymer is a product obtained by reacting a styrene-ethylene-butylene-styrene copolymer with maleic anhydride. According to the invention, efficient reutilization of recycled polycarbonate is realized, rigid-tough balance is improved through interface bonding of the reactive flexibilizer, the material is endowed with self-repairing capability by utilizing a dynamic cross-linked network, and the service life is remarkably prolonged.

The invention discloses a thermoplastic wave-absorbing material as well as a preparation method and application thereof. The thermoplastic wave-absorbing material comprises a silane coupling agent modified absorbent and thermoplastic polyurethane, wherein the thermoplastic polyurethane is prepared from the following raw materials in parts by mass: 100 parts of a polyurethane matrix, 2 to 4 parts of an anti-hydrolysis agent, 2 to 4 parts of an antioxidant, 0.1 to 0.5 part of a mildew preventive and 2 to 10 parts of a plasticizer. The thermoplastic wave-absorbing material disclosed by the invention has good wave-absorbing performance in a range of 1-18GHz, has temperature resistance, flexibility, mechanical strength and environmental adaptability which are equivalent to those of a thermosetting material, and has a wide application prospect. According to the preparation method, extrusion molding is adopted, continuous production can be achieved, use of solvents is reduced, the method is more environmentally friendly, the material can be recycled after being damaged, and therefore the material cost is effectively reduced.

The invention discloses a method for recovering and repairing positive and negative electrode materials of a lithium ion battery, which comprises the following steps of: crushing a waste lithium ion battery into sheets, volatilizing electrolyte through low-temperature heat treatment, and screening out an aluminum shell and a diaphragm through winnowing to obtain a positive and negative electrode sheet mixture; performing color sorting on the positive and negative electrode plate mixture through a color sorter, and separating to obtain a positive electrode plate and a negative electrode plate; sintering the positive plate for the first time to volatilize the binder, and then sintering for the second time to complete repair to obtain a positive electrode material and aluminum powder; and repairing the negative plate directly through one-time sintering to obtain a negative electrode material and copper powder. According to the method, separation, recovery and repair of the positive and negative electrode materials in the waste lithium ion battery are directly realized through crushing, low-temperature heat treatment, winnowing, color sorting and sintering, the positive and negative electrode materials are high in recovery rate and low in impurity content, and the positive and negative electrode materials in the waste lithium ion battery can recover or even exceed the original performance through accurate repair.

The invention relates to the technical field of powder conveying, in particular to melamine resin powder quantitative conveying and excess material automatic recycling integrated equipment which comprises a support and a discharging tank. The transmission assembly comprises a discharging barrel, a material moving column and a pushing head; the stroke adjusting assembly comprises a first adjusting rod; the excess material recycling assembly comprises a rack and a sliding rod, quantitative discharging and excess material recycling are integrated, the operation steps are optimized, meanwhile, the efficiency is improved, meanwhile, charging, discharging and excess material recycling are automatically achieved in the rotating process of the material moving column, the circulating integrated production process is achieved, and the production efficiency is improved. When the excess material recycling assembly vibrates, excess materials on the lower portion are shaken off and collected, meanwhile, falling distributed materials on the upper portion are vibrated, gaps are eliminated, accurate discharging is guaranteed, when the discharging amount is set, balance weights are adjusted in a self-adaptive mode, finally, the amplitude and the vibration effect are improved in a self-adaptive mode, integrated adjustment of the discharging amount range and the amplitude is achieved, and the discharging efficiency is improved. The occupied space is saved; and meanwhile, the production efficiency is improved.

The invention discloses a power battery disassembling method and related equipment, and relates to the technical field of power batteries, and the method comprises the following steps: obtaining multi-mode sensing data of a to-be-disassembled battery pack; performing risk assessment on the multi-modal sensing data based on a preset safety threshold, and generating a risk level matrix; based on the multi-modal sensing data and the risk level matrix, analyzing and processing the battery pack topological relation of the to-be-disassembled battery pack through a preset adaptive decision model to obtain a disassembling path planning scheme; and based on the disassembling force parameter and the disassembling path priority, controlling the heterogeneous robot to collaboratively execute the disassembling operation on the to-be-disassembled battery pack by an execution unit. Through multi-mode sensing, risk assessment, self-adaptive path planning and heterogeneous robot collaborative operation, high safety, high efficiency and high precision in the power battery pack disassembling process are achieved, and the material recycling value is improved.

The invention provides an in-situ modification method for a binder of a lithium battery recycled negative electrode material and a graphite negative electrode material prepared by the same, and relates to the technical field of lithium battery negative electrode material recycling. The modification method comprises the following steps: mixing recovered binder-containing negative electrode material powder with an acid solution, and stirring to obtain a mixed solution; oxidizing the mixed solution by adopting a composite oxidant of persulfate and ozone to degrade the binder to obtain an oxidized solution I; carrying out microwave irradiation treatment on the oxidation liquid to obtain oxidation liquid II; and filtering, washing, drying and carbonizing the oxidation liquid II to obtain the regenerated graphite material. The invention provides an efficient and environment-friendly graphite negative electrode regeneration and upgrading integrated scheme, and high-valued recovery and performance improvement of the waste graphite negative electrode are realized by innovatively combining a multi-stage process of acid dissolution, catalytic oxidation, microwave enhancement and carbonization modification.

A system for selectively opening flexible containers, such as plastic bags, in a mixed solid waste stream is disclosed, for use in Material Recovery Facilities (MRFs) or other contexts. The system may include a conveyor configured to transport waste, a sensor configured to detect the presence and position of flexible containers, and a multi-degree-of-freedom positioning device that moves a cutting tool relative to the containers. A processor, in communication with the sensor and positioning device, may calculate a cutting path and control the positioning device to execute the cutting operation. The system may utilize various cutting tools, including punches, blades, spades, shovels, and motorized saws, as well as non-contact fluid-based cutting technologies such as air or water jets. Additionally, the system can dynamically adjust the cutting trajectory based on real-time feedback and environmental conditions. The method provides an adaptable solution to open bags without damaging recyclable materials, improving throughput and reducing waste in mixed waste streams.

The invention discloses an automobile laser cutting waste classified collection and storage device, and relates to the field of laser cutting, the automobile laser cutting waste classified collection and storage device comprises a bearing frame, a bottom frame and long steel pipes, the interior of the bottom frame is fixedly connected with two sets of inclined plate frames in mirror symmetry, and the two sets of long steel pipes are fixedly connected to the middle position of the lower side of the bottom frame; a classified collection mechanism is arranged below the bottom frame and located between the two sets of long steel pipes. Waste materials are gathered through the angle plates and the protruding edges of the inclined plate frame, and it is ensured that the waste materials accurately fall into the classified collection mechanism; the first net rack blocks small metal materials, the second net rack retains chippings, and the bottom box collects cooling liquid, so that the three types of materials are thoroughly separated; the gear motor drives the crank rod and the push rod to drive the second net rack to swing, accumulation is prevented, the screening efficiency is improved, the separation effect is guaranteed, no mixed collection exists in the whole process, small metal materials can be recycled, chippings can be treated in a centralized mode, cooling liquid can be filtered and reused, resource waste is thoroughly avoided, and the energy-saving and consumption-reducing requirements of a workshop are met.

The invention relates to the technical field of alumina material preparation, in particular to macroporous pseudo-boehmite and a combined preparation method thereof. The preparation method comprises the following steps: carrying out neutralization reaction on carbon dioxide and a sodium aluminate solution to obtain neutralized slurry; performing first aging treatment on the neutralized slurry to obtain first aged slurry; filtering the first aged slurry to obtain a solid-phase material and a liquid-phase material; sequentially washing and drying the solid-phase material to obtain a first macroporous pseudo-boehmite product; aluminum sulfate and the sodium aluminate solution are subjected to parallel flow neutralization, and aluminum hydroxide slurry is obtained; mixing the aluminum hydroxide slurry with the liquid-phase material, and then carrying out second aging treatment to obtain second aged slurry; performing post-treatment on the second aged slurry to obtain a second macroporous pseudo-boehmite product; and collecting the two macroporous pseudo-boehmite products in batches. According to the preparation method, pseudo-boehmite with different pore structure characteristics is respectively prepared through two neutralization technologies based on three mechanisms of staged treatment, material recycling and structure complementation.

The invention discloses a battery decommissioning recycling quality traceability and grading processing system and method, and relates to the technical field of battery quality traceability, and the method comprises the steps: obtaining data, and carrying out the preprocessing of the data; a forward electrochemical model is constructed and solved, a short-time high-temperature event is obtained, and a thermal damage risk value is output; based on multi-mode non-destructive detection, external boundary measurement is collected, and chemical non-uniformity is output through a multi-mode coupling strategy; the recovery measurement, the thermal damage risk value and the chemical non-uniformity are standardized into recovery verification labels, abstract hash is calculated, and a timestamp is submitted; the output and the battery recovery multi-dimensional indexes are fused into a comprehensive disposal score, disposal suggestions for each batch are output according to a set rule, and sorting and execution instructions are issued; and performing aggregation statistics and anomaly detection on the same manufacturing batch based on the recovery verification label. The method solves the problem of low material recovery rate caused by information fault and recovery rate fluctuation.

The invention discloses a method for extracting high-purity lithium carbonate from mixed lithium battery waste, and relates to the technical field of recycling of metal materials, and the method comprises the following steps: size mixing, dissolving and leaching, impurity removal of leachate, MVR concentration, lithium precipitation and secondary lithium precipitation. According to the method, the process is simple and energy-saving, roasting is not needed, additional energy consumption and harmful gas emission are avoided, the dissolving and leaching temperature is 50-60 DEG C, energy consumption is reduced, and the safety risk is lowered; the impurity removal only comprises three steps of alkalization, PAM flocculation and activated carbon adsorption, a reducing agent is not needed, and the impurity content is reduced to 5 mg / L or below; the lithium leaching efficiency is gt; by combining lithium precipitation optimization design and secondary lithium precipitation, the total recovery rate exceeds 90%, battery-grade lithium carbonate of which the yield is greater than or equal to 99.5% and industrial-grade lithium carbonate of which the yield is greater than or equal to 99.2% can be stably produced, and the quality standard is met; the MVR condensate water is fully recycled to realize zero discharge of wastewater and standard treatment of solid waste, and through DCS formula management, the mixed lithium battery waste can be flexibly treated, and the method is suitable for industrial continuous production.

The invention relates to the technical field of building material recycling management, and discloses a recycling management system and method for degradable materials of building materials. The system comprises a material feature extraction network, a state prediction model network and a recovery optimization module. The material feature extraction network generates initial feature space representation data and current feature space representation data according to the degradation monitoring data of the degradable building material; the state prediction model network combines the initial feature space representation data and the initial degradation monitoring data to predict a recovery state change sequence of the material; the recovery optimization module compares the current feature space representation data with the material state on the predicted recovery state change sequence, calculates an optimization parameter of each current material state, learns a strategy of maximizing an expected cumulative optimization index according to the optimization parameter, obtains an optimization parameter of the current degradation monitoring data, and recovers the degradation monitoring data according to the optimization parameter; therefore, the recycling process of the degradable building material can be guided.

The invention belongs to the technical field of material recycling, and particularly relates to a recycling method of lithium iron phosphate pole piece waste. The invention provides a recycling method of lithium iron phosphate positive pole piece waste, which comprises the steps of high-temperature treatment, crushing, screening, mixing with a surfactant aqueous solution, adding of aluminum removal liquid, reaction, solid-liquid separation, cleaning, drying, calcination and the like. According to the method, the aluminum foil is separated by adding the PVDF binder into the aluminum foil, so that the binder PVDF is decomposed to lose the binding force, and then the steps of nonionic surfactant treatment, organic acid soaking and the like are sequentially performed, so that direct contact between lithium iron phosphate particles and acid liquor can be reduced, lithium ions are prevented from being separated, the specific capacity of the material is not lost, and the overall recovery of the lithium iron phosphate is realized. And the recycled lithium iron phosphate material is directly used for preparing the lithium ion battery, so that the battery performance is good, and the application value of the lithium iron phosphate material can be improved.

The application belongs to the technical field of waste lithium battery positive electrode material recycling, and specifically discloses a method for preparing basic lithium iron phosphate from waste lithium iron phosphate positive electrode powder, which comprises the following steps: subjecting the waste lithium iron phosphate positive electrode powder to acid leaching treatment, and performing solid-liquid separation to obtain a leaching solution; subjecting the leaching solution to oxidation treatment, and then performing precipitation treatment with sodium hydroxide, and performing solid-liquid separation to obtain a lithium solution and iron-phosphorus slag; subjecting the slurry formed by slurrying the iron-phosphorus slag and a lithium source to hydrothermal treatment at a temperature of 200 DEG C or above to obtain the basic lithium iron phosphate. The application also comprises a scheme for preparing lithium iron phosphate by mixing and reacting the basic lithium iron phosphate and a carbon source. The scheme can obtain basic lithium iron phosphate with high phase purity, and further can prepare regenerated lithium iron phosphate material with better performance.

The invention belongs to the technical field of metal material regeneration, and particularly relates to a secondary aluminum alloy multistage gradient iron removal method which comprises the following steps: pretreating waste aluminum to remove impurities on the surface of the waste aluminum; the method comprises the following steps: pretreating waste aluminum, placing the pretreated waste aluminum at 775-785 DEG C to form molten aluminum, and standing the molten aluminum to enable a crude iron phase with the particle size of more than 50 microns to sink; the temperature is controlled to be 715-725 DEG C, a composite iron removal agent is added, medium-fine iron phases with the particle size being 10-50 microns and low-density slag phases with the density being smaller than or equal to 4.8 g / cm < 3 > are adsorbed to float, and the composite iron removal agent is a mixture of Na2B4O7 and K2TiF6; and performing electromagnetic separation to complete iron removal. The method realizes efficient iron removal, is low in cost, environment-friendly and pollution-free, and does not introduce Mn / Cr and other impurities.