127results about How to "Improve leaching efficiency" patented technology

The invention provides a detoxification method and system based on nanofiltration treatment of lithium ore smelting slag, and the method comprises the following steps: step S1: carrying out acid leaching treatment on the lithium ore smelting slag by using an inorganic acid liquid, so that acid-soluble components in the lithium ore smelting slag are dissolved in the inorganic acid liquid to obtain an acid leaching liquid and detoxified smelting slag; s2, the acid leaching solution is subjected to oxidation treatment, metal ions with intermediate valence in the acid leaching solution are oxidized into metal ions with high valence, and an oxidized acid leaching solution is obtained; s3, carrying out nanofiltration treatment on the oxidized pickle liquor to intercept high-valence metal ions in the oxidized pickle liquor so as to obtain concentrated liquor and permeate liquor; s4, using the permeate liquid as the inorganic acid liquid in the step S1 for acid leaching treatment. According to the method, toxic components in the lithium ore smelting slag can be fully separated, and resource utilization is easier.

The invention discloses a leaching reaction kettle. The leaching reaction kettle comprises a reaction tank, a stirring assembly, a guide cylinder and an aeration pipe. The stirring assembly comprises a stirring part; the flow guide cylinder is arranged in the reaction tank, the flow guide cylinder divides the reaction tank into an inner side space and an outer side space, the flow guide cylinder is arranged around the stirring part and defines the inner side space, the stirring part is used for driving fluid in the inner side space to flow upwards, the flow guide cylinder is provided with an upper opening and a lower opening, and the upper opening is communicated with the lower opening. The inner side space and the outer side space are communicated through the upper opening and the lower opening; and the aeration pipe is used for introducing reaction gas into the lower part of the inner side space. The leaching reaction kettle can improve the leaching efficiency of materials and the utilization rate of reaction gas.

The invention discloses a tailing agitation leaching device and process, and belongs to the technical field of tailing leaching. The tailing stirring and leaching device comprises a leaching tank, a rotating shaft is rotationally connected in the leaching tank, the side wall of the rotating shaft is rotationally connected with a stirring rod through a hinge seat, the tailing stirring and leaching device further comprises a smashing assembly, a stirring assembly and a stirring assembly, and the smashing assembly is arranged in the leaching tank and used for smashing tailings in the leaching tank; through rotation of a stirring rod and semispherical blocks, a mixed solution of tailings and a leaching solution is stirred, the tailings and the leaching solution are uniformly mixed, the leaching effect is effectively improved, the three sets of semispherical blocks intermittently collide in the rotating process through the attraction effect of a first magnetic plate and a second magnetic plate, and the leaching effect is effectively improved. And the two extrusion plates are arranged in the leaching liquid, so that tailings which suspend in the leaching liquid and are located between the two extrusion plates are crushed, the leaching liquid can make full contact with tailings particles, then dissolution of metal in the tailings is promoted, and the leaching effect is improved.

The invention discloses a method for leaching rare earth elements in neodymium iron boron waste through synergistic reinforcement of sulfating roasting and a surfactant, and belongs to the technical field of rare earth recovery. The method comprises the following steps: mixing neodymium iron boron waste and concentrated sulfuric acid to prepare a roasting raw material; carrying out roasting treatment on the roasted raw material to obtain a roasted product; the roasted product and a leaching agent are mixed and then leached and filtered, filter residues and filtrate are prepared, and the filtrate is directly used for separation of rare earth elements leached from the neodymium iron boron waste; the leaching agent at least comprises two surfactants. According to the method provided by the invention, multiple surfactants are compounded and cooperate with the sulfating roasting process, so that the leaching rate of the rare earth can be effectively improved, the acid consumption can be reduced, and the purpose of improving the recovery purity of the rare earth element can be achieved; in addition, the compound surfactant is simple in preparation method and convenient to use, and the neodymium iron boron waste recovery cost is reduced to a large extent.

The invention relates to the technical field of vanadium metallurgy, and discloses a method for extracting vanadium from calcified vanadium extraction tailings through leaching, which comprises the following steps: S1, carrying out chute reselection on the calcified vanadium extraction tailings to obtain coarse-fraction chute reselection slag and fine-fraction chute reselection slag; s2, performing mechanical activation on ammonium bicarbonate, mixing the coarse-fraction chute reselection slag with ammonium bicarbonate, adding hot water, performing bubbling and stirring reaction, and performing solid-liquid separation to obtain desulfurized slag; and S3, dilute nitric acid, calcium fluoride and hydrogen peroxide are added into the desulfurization residues, a reaction is conducted at the temperature of 70-75 DEG C, and secondary leaching tailings and a vanadium-containing solution are obtained through solid-liquid separation. According to the method, the reselection technology is adopted, 90% or above of calcium sulfate can be directly removed, vanadium can be directly extracted through leaching by adding simple chemical reagents, complex processes such as drying, roasting and re-leaching are not needed, the production cost can be greatly reduced, environmental pollution is reduced, the vanadium leaching rate is larger than 65%, and ammonium sulfate can be recycled in the process for follow-up vanadium precipitation.

The invention belongs to the technical field of grease extraction. The multi-stage extraction and leaching device comprises a first extraction and leaching section, a second extraction and leaching section and a third extraction and leaching section, the first leaching mechanism comprises a first material conveying mechanism and a second material conveying mechanism which have a height difference; the second extraction and leaching section is located below the first extraction and leaching section and comprises a second shell and a second leaching mechanism arranged in the second shell, the feeding end of the second shell communicates with the discharging end of the first shell, and the discharging end of the second shell communicates with the discharging end of the second shell; and the second leaching mechanism comprises a third material conveying mechanism and a fourth material conveying mechanism which have a height difference. The invention further discloses a multi-stage extraction leaching process. The device is used for solving the technical problems that materials of existing leaching equipment are compacted in the conveying process, the permeation rate of a solvent is affected, and the leaching efficiency is low.

The invention discloses a gold leaching process using a high-safety bromine-containing substance, and belongs to the technical field of gold extraction. According to the method, the dibromo dimethyl hydantoin and the calcium bromide are prepared into the leaching solution according to a certain proportion, efficient gold leaching is achieved by adjusting parameters such as the pH value and the leaching time under the condition of the metal ion catalyst, and the gold can be effectively adsorbed, analyzed and recycled through the leached pregnant solution. Meanwhile, bromine in the leachate is recycled through an electrochemical method, bromine is prevented from permeating into the environment, the dosage of chemicals is reduced, a complete gold leaching and chemical circulating system is constructed, the gold leaching efficiency is improved, the environmental risk is reduced, the technical applicability is expanded, and the defects that traditional liquid bromine gold leaching is large in toxicity, low in leaching rate and leaching efficiency and the like are overcome.

The invention discloses a method for preparing a regenerated lithium-rich manganese-based positive electrode material by taking a retired lithium ion battery positive electrode material as a raw material. Comprising the following steps: 1) mixing waste NCM111 positive electrode material powder with an acid solvent to obtain a leaching solution I; mixing the waste LMO positive electrode material powder with an acid solvent to obtain a leaching solution II; measuring the concentrations of nickel ions, cobalt ions and manganese ions in the two lixiviums, adjusting the proportion of the two lixiviums according to the stoichiometric ratio of nickel, cobalt and manganese elements in the lithium-rich manganese, and mixing to obtain a positive electrode material lixivium; the preparation method comprises the following steps of 1) preparing a positive electrode material leachate, 2) dissolving sodium bicarbonate in a mixed solvent of alkali and water to obtain a clear solution, 3) dropwise adding the clear solution into the positive electrode material leachate, heating, stirring, adjusting the pH value to 6.5-11.5, and carrying out suction filtration to obtain a lithium-rich manganese oxide precursor, and 4) mixing the lithium-rich manganese oxide precursor with a lithium source, and carrying out calcination I and calcination II to obtain the regenerated lithium-rich manganese-based positive electrode material.

The invention discloses a succinimide leaching agent suitable for co-production of light calcium carbonate through CO2 indirect mineralization of alkaline solid waste. The succinimide leaching agent is prepared from a main leaching agent succinimide and a solvent water; the concentration of the main leaching agent succinimide in the succinimide leaching agent is 5-25 wt%. The succinimide leaching agent suitable for CO2 indirect mineralization of alkaline solid waste is simple in composition, high in calcium ion leaching efficiency, high in selectivity, low in leaching agent viscosity and capable of being recycled, and loss and cost of the leaching agent are reduced; in the mineralization stage, CO2 is promoted to be dissolved from a gas phase to a liquid phase, so that the reaction rate of the mineralization reaction is favorably improved, the production efficiency of calcium carbonate is improved, and the process cost is reduced.

The invention discloses a treatment method for coal gangue rich in lithium and gallium, belongs to the technical field of coal series solid waste resource utilization, and aims to solve the problem of low resource utilization rate of coal gangue in the prior art. The method comprises the following steps: screening a coal gangue raw material; the oversize gangue is pre-sorted, and sorted concentrate rich in lithium and gallium and sorted tailings rich in iron are obtained; crushing the undersize gangue and the separated concentrate to obtain a crushed mixture; performing magnetic roasting on the crushed mixture to obtain a roasted product; carrying out magnetic separation on the roasted product to obtain magnetic separation tailings and iron-rich magnetic separation concentrate; mixing the magnetic separation tailings with a roasting auxiliary agent, and sequentially carrying out activating roasting, acid leaching and filtering to obtain leaching residues and lithium gallium leaching liquid; and separating and purifying the lithium-gallium leaching solution to obtain metal lithium and metal gallium. The method can be used for treating the coal gangue rich in lithium and gallium.

The present invention relates to a method for recovering retired ternary lithium battery positive electrode materials, wherein the ternary positive electrode materials are sequentially stripped, crushed, and acid-leached, and then subjected to two electrolytic cell treatments, wherein the first treatment is carried out at a pH of 3 to 6, and the acid leaching solution is used as an electrolyte at a temperature of 10 to 100 A / m 2 Electrolysis is carried out for 3-8 hours at a current density of , and MnO2 at the anode of the electrolytic cell, the Ni-Co complex at the cathode of the electrolytic cell, and the lithium salt in the electrolyte are obtained respectively. The lithium salt is precipitated by sodium carbonate to separate Li, Mn, and Ni-Co. The recovery rate of each metal is high and the purity is good. After that, the electrode containing the Ni-Co complex is continued to be electrolyzed in the electrolytic cell, and the metal nickel and cobalt are separated by controlling parameters such as pH and electrolyte composition. The present invention can efficiently and accurately recover the valuable metals of the ternary positive electrode materials of retired lithium-ion batteries through simple electrolytic cell treatment, is simple to operate and has high economic value.

The invention discloses a method for strengthening leaching of valuable metals in a waste lithium battery positive electrode material, and relates to the field of waste battery material recovery, and the method comprises the following steps: S1, obtaining a positive electrode plate of a waste lithium battery, and crushing to obtain positive electrode active powder; s2, the three-necked flask is placed in a water bath ultrasonic pot, a left side opening is used for placing a condensation pipe, a central opening is used for placing a stirrer, and a right side opening is used for adding a medicament; s3, adding organic acid into the three-necked flask through a right side opening, and sequentially adding silicon dioxide, metal salt and positive electrode active powder to obtain a mixed solution; s4, uniformly mixing the medicaments in the step S3 by using a water bath ultrasonic pot and a stirrer, and obtaining reacted liquid after the reaction is finished; s5, carrying out solid-liquid separation on the reacted liquid in the step S4, and washing for multiple times to obtain separated solid and liquid; and S6, a set amount of nitric acid is added into the liquid obtained in the step S5, metal hydrolytic precipitation is prevented, then deionized water is used for fixing the volume to 1 L, and leaching liquid containing metal cobalt and lithium is obtained.

The invention discloses a method for recovering a lithium element in a retired ternary lithium battery positive electrode material, and relates to the technical field of battery recovery, and the method comprises the following steps: S1, uniformly mixed carbon powder and ternary positive electrode recovery powder are placed in a reduction furnace, and a carbon thermal reduction reaction is carried out under the protection of a nitrogen atmosphere to obtain a reduced material; s2, the reduction material, pure water and grinding balls are put into a pressurized ball milling tank, carbon dioxide is introduced, ball milling is conducted in the high-pressure environment of 2-5 MPa, and ball milling slurry is obtained; s3, carrying out solid-liquid separation on the ball-milled slurry to obtain a lithium extraction leachate; s4, the lithium extraction leachate is subjected to impurity removal, concentration and thermal decomposition, and lithium carbonate crystals are obtained; and S5, washing, drying and crushing the lithium carbonate crystals to obtain the battery-grade lithium carbonate. According to the method disclosed by the invention, lithium is extracted by matching carbon dioxide with ball-milling water in a high-pressure environment, so that the leaching efficiency and the leaching rate of the lithium element in the reduced ternary positive electrode recycled powder can be effectively improved.

The waste treatment device for machining comprises a separation box, a circle of supporting part is arranged in the separation box, a filter cartridge with the two ends open is arranged in an opening of the supporting part, the top of the filter cartridge is bent to form a bent part buckled on the supporting part, and a mounting rod is arranged in the middle of the bottom of the filter cartridge in the radial direction; filter plates for sealing an opening in the bottom of the filter cartridge are hinged to the two sides of the mounting rod, and a circular ring is arranged below the two filter plates and driven by a hydraulic rod I below the circular ring; a circle of liquid inlet pipe sleeves the outer side of the separation box above the bending part, a plurality of groups of communicating pipes communicated with the separation box are arranged on the liquid inlet pipe, a pressing plate driven by a hydraulic rod II is arranged in the separation box positioned above the communicating pipes, a motor is arranged on the pressing plate, and a stirring paddle positioned below the pressing plate is arranged on an output shaft of the motor. The device is simple in structure and convenient to use.

The invention discloses a method for preparing iron phosphate and aluminum oxide by utilizing step-by-step leaching of red mud, which comprises the following steps: (a) carrying out ore grinding treatment on the red mud to obtain red mud powder with preset fineness; (b) adding the red mud powder into mixed acid, carrying out acid leaching treatment at 30-50 DEG C, carrying out ultrasonic treatment assisted in the acid leaching process to obtain a leaching mixed solution, and carrying out solid-liquid separation on the leaching mixed solution to obtain leaching residues and a leaching solution containing iron and aluminum ions; the mixed acid is a mixed solution of hydrochloric acid, oxalic acid and phosphoric acid, the molar ratio of hydrochloric acid to oxalic acid is (2-5): (2-5), and the ratio of the amount of phosphoric acid substance to the amount of iron substance in the red mud is (0.9-1.2): 1; the molar concentration of H < + > in the mixed acid solution is 4-10 mol / L; (c) adjusting the pH value of the leachate, carrying out auxiliary stirring reaction under a set temperature condition, and then aging and filtering to obtain crude iron phosphate and filtrate; (d) calcining the crude iron phosphate, and cooling to obtain battery-grade iron phosphate; (e) adjusting the pH value of the filtrate, carrying out auxiliary stirring reaction under a preset temperature condition, and then aging and filtering to obtain aluminum hydroxide precipitate; and (f) calcining the aluminum hydroxide precipitate, and cooling to obtain the aluminum oxide.

The invention relates to a pressurized oxygen-enriched leaching method for a waste catalyst containing tungsten and molybdenum, and relates to the technical field of solid waste resource utilization, in particular to a pressurized oxygen-enriched leaching method for efficiently recovering tungsten and molybdenum from the waste catalyst containing tungsten and molybdenum, which comprises the following steps: firstly, removing organic matters and sulfides in the waste catalyst through anaerobic pyrolysis and oxidizing roasting steps; tungsten and molybdenum are oxidized into tungsten oxide and molybdenum oxide. Then, the treated catalyst is smashed and subjected to oxygen-enriched alkaline leaching in a high-pressure reaction kettle, a mixed solution of sodium carbonate and sodium hydroxide is selected as a leaching agent, and tungsten and molybdenum are converted into water-soluble sodium tungstate and sodium molybdate respectively under the conditions that the temperature is 150-200 DEG C and the oxygen pressure is 0.1-1.5 MPa, so that efficient leaching is achieved. By means of the method, the leaching rates of molybdenum and tungsten can reach 99% or above and 95% or above respectively, the recovery efficiency of valuable metal is remarkably improved, and the process is simple, environmentally friendly and suitable for large-scale industrial production.

The invention relates to a method for recovering valuable metal lithium from a waste ternary lithium ion battery, which comprises the following steps of: (1) discharging the waste ternary lithium ion battery, crushing, and sorting into black powder mixed with positive and negative electrode materials; (2) mixing the mixed black powder with a catalyst, and carrying out high-speed ball milling to improve the reduction activity of graphite; (3) roasting the powder in an inert atmosphere to obtain reduction roasting slag; and (4) putting the reduction roasting slag into a high-pressure kettle, adding deionized water, carrying out pressure boiling and lithium leaching reaction under the conditions of pressurization and heating, filtering after the reaction is completed, adding sodium carbonate into filtrate to precipitate lithium, and then filtering and drying to obtain a lithium carbonate product. According to the method, the graphite contained in the negative electrode is activated into the reducing agent, the ternary positive electrode material is reduced, the reduced ternary positive electrode material is directly autoclaved with water to extract lithium, an extra exogenous reducing agent is not needed, a chemical reagent is not needed, the method is simple, environment-friendly and low in cost, and the lithium extraction yield is relatively high.

The invention discloses a short-process low-cost cyaniding gold extraction system and a control method thereof, and belongs to the technical field of precious metal extraction. Gold-bearing ores are fully paved in the leaching pool, and an alkaline cyanogen-bearing solution or an environment-friendly gold extraction agent solution is injected into the leaching pool. And a drainage pipe is arranged at the top of the leaching tank and a drainage ditch is arranged at the bottom. A seepage collection tank, a sedimentation tank, a sedimentation tank, a pregnant solution tank and a barren solution tank which are arranged under the earth surface are excavated and built on one side of the leaching tank, and a carbon adsorption tank is arranged. The barren liquor returns to the leaching pool through the submersible pump and the boiling slurry making device at regular time, the leaching efficiency is improved, meanwhile, natural layering of coarse ore and fine ore is achieved, the water content of cyanide residues obtained after leaching is reduced, and the barren liquor washing effect is achieved. The method is low in investment cost, short in construction period, short in process, low in production cost and easy to operate, manage and control. In addition, the leaching tank, the settling tank, the settling tank and the like are simple in structure, large in volume and capable of obtaining high treatment capacity.

The invention discloses a method for efficiently leaching platinum group metal in a waste automobile catalyst, and belongs to the field of rare and precious metal smelting. The method comprises the following steps: a leaching process: mixing the hulled waste automobile catalyst with a leaching agent, carrying out acid leaching in an acidic solution for a period of time, adding a complexing agent to complex platinum group metals, leaching for a period of time, and filtering to obtain a pregnant solution rich in the platinum group metals and carrier residues; wherein the leaching agent is a cerium-containing compound; a resin adsorption process: adsorbing the pregnant solution through an adsorption column filled with adsorption resin to obtain an adsorbed solution; and an elution process: washing the adsorbed adsorption resin with water and eluting the platinum group metal step by step, and regenerating the eluted adsorption resin for cyclic utilization. The method aims at avoiding generation of toxic and harmful substances (chlorine and NOx) and use of highly toxic cyanide in an existing wet process, environmental pollution and potential safety hazards are fundamentally eliminated, and meanwhile the leaching efficiency of the platinum group metal is remarkably improved.

The invention discloses a leech extract and a preparation method and application thereof, and relates to the technical field of leech extract preparation, the leech extract comprises leech oil, hirudin, mixed polypeptide and a small molecule extract, the small molecule extract is a small molecule compound and trace elements, the small molecule compounds are small molecule oligopeptides, pyridines, glycolipids, carboxylic esters and steroids, and the trace elements comprise Fe, Mn, Zn and Co; according to the leech extract and the preparation method and application thereof, through low-temperature, high-pressure and organic solvent subcritical efficient extraction, living leeches are instantly killed, biological enzymes are inactivated, leech oil in the leeches is effectively extracted, peculiar smells are removed, meanwhile, thermosensitive functional components are protected, and the extraction efficiency of hirudin is improved; ultrasonic extraction is performed through a continuous countercurrent ultrasonic extractor, so that the leaching efficiency of the hirudin is improved; neutral or alkaline protease is used for enzymolysis, protein is converted into high-activity oligopeptide, the utilization rate of effective components is increased, and the peculiar smell of the product is reduced.

The application discloses a method and system for comprehensively utilizing high-magnesium nickel sulfide ore by a low-temperature oxygen-rich method. The method comprises the following steps: obtaining pre-leaching residue by pre-leaching and magnesium removal with high-magnesium nickel sulfide ore as raw material; obtaining activated ore slurry by mechanically activating the pre-leaching residue; and obtaining a nickel-containing leaching solution by low-temperature oxygen-rich leaching of the activated ore slurry. The application has wide application range, is simple and reliable, easy to control, and low in investment cost, and can convert metals into corresponding products, so that high-magnesium nickel sulfide concentrate can be treated at low cost and high efficiency.

The invention discloses an ammonia-process dump leaching method for copper sulphide ore, which comprises the following steps: treating the copper sulphide ore by adopting a dump leaching mode at a leaching agent temperature of-10-4 DEG C, taking an ammonium salt solution as a leaching agent, controlling the total ammonia concentration of the leaching agent to be 0.5-5mol / L and the pH range to be 7.5-9.5, adding the leaching agent into the copper sulphide ore by adopting a dripping leaching mode, and the copper-containing leachate is extracted and then returned to the leaching process, and ammonia and the ammonia leaching accelerant in the copper-containing leachate are recycled. The temperature of the leaching agent is controlled to be-10-4 DEG C for leaching, the ammonia consumption in the ammonia leaching process can be remarkably reduced, the leaching efficiency of copper under the low-temperature condition can be improved by adding the ammonia leaching accelerant, meanwhile, the copper-containing leachate is returned to the leaching process after being extracted, ammonia and the ammonia leaching accelerant in the copper-containing leachate are recycled, the purpose of effectively leaching chalcopyrite under the low ammonia consumption is achieved, and the method is suitable for large-scale industrial production. And a new technology is provided for development and utilization of low-grade primary copper sulphide ore in alpine regions.

This invention relates to an ultrasonic field-enhanced gas-filled leaching tank, comprising a tank body, a stirring device, a gas filling device, and an ultrasonic generator. The tank body has a leaching chamber with an open upper end. The stirring head of the stirring device is located inside the leaching chamber. The gas filling device includes a gas filling pipe, with its inlet located outside the leaching chamber for connecting to an external gas supply device, and its outlet located inside the leaching chamber. The ultrasonic generator includes an ultrasonic probe, which is disposed inside the gas filling pipe to generate an ultrasonic field enhancement effect when gas is transported through the gas filling pipe. Compared with the prior art, the ultrasonic field-enhanced gas-filled leaching tank provided by this invention enhances the synergistic oxidation of oxidants and non-ferrous metals through ultrasound, achieving rapid and efficient leaching of non-ferrous metals. The advantage of this technology is that ultrasound can generate strong liquid flow shear force and microbubbles, increasing the contact area between the liquid and the metal surface, promoting the reaction between the oxidant and the non-ferrous metals, and improving leaching efficiency.

The invention belongs to the field of waste battery recovery, and particularly relates to a synergistic leaching agent for recovering valuable elements of a waste lithium ion battery positive electrode material, the synergistic leaching agent comprises an inorganic acid liquid and a compound # imgabs0 # shown in a formula 1, and the invention also comprises a scheme for leaching the waste positive electrode material by using the leaching agent. According to the method, the leaching efficiency and effect of the waste battery positive electrode can be remarkably reduced, and 99% or above of valuable metal elements can be leached within 30 min at the temperature of 50 DEG C or below.

The invention discloses a leaching agent and application thereof in zinc ore leaching, and belongs to the technical field of mineral extraction. The leaching agent comprises citrate, dilute sulphuric acid, alkyl sodium sulfonate, a complexing agent, vegetable protein hydrolysate and the like. The method comprises the following steps: performing acidolysis on part of zinc ore by using sulfuric acid to obtain a primary leaching solution and primary leaching residues when the zinc ore is leached; mixing the primary leaching solution with a leaching agent, and leaching the primary leaching residues by using the mixture to obtain a zinc-containing solution and secondary leaching residues; the secondary leaching residues are subjected to leaching with a leaching agent, third-time leaching liquid and third-time leaching residues are obtained, the third-time leaching liquid and the leaching agent are mixed, the third-time leaching residues are subjected to leaching with the mixture, and fourth-time leaching liquid and waste residues are obtained; and then replacing the initial sulfuric acid with the four-time lixivium, and repeating the steps to complete the leaching of the zinc ore. By the adoption of the leaching agent and the leaching process, zinc in the zinc ore can be effectively extracted, and the leaching agent and the leaching process have important significance on efficient utilization of zinc ore resources.

This invention provides equipment and a process for recovering valuable metals from lithium leaching residue, relating to the field of solid waste treatment technology. The equipment includes an electrically movable frame, an electrically lifting frame, a first treatment tank, a second treatment tank, a drive mechanism, and an acid leaching mechanism. The electrically lifting frame has an electrically adjustable lifting plate installed externally, and the drive mechanism is located on the outer wall of the lifting plate. The drive mechanism includes a fixed plate fixedly installed on the outer wall of the lifting plate, and a first mounting plate and a second mounting plate are fixedly mounted on the outer wall of the fixed plate. This design can automatically switch the rotation direction of the rotating plate and adaptively switch it from a vertical to an inclined posture. It can adapt to the characteristics of low-solids-content fluids. Through adaptive posture adjustment throughout the entire process—from strong vertical mixing in the early stage to uniform inclined suspension in the later stage—it achieves matching of the entire acid leaching process, comprehensively improving the overall leaching efficiency of valuable metals, facilitating subsequent solid-liquid separation processes, and further optimizing the resource utilization of leaching residue and the harmless disposal of solid waste.

This invention discloses a bimetallic organic framework material, its preparation method, and its application in waste gas purification. Specifically, it uses waste plastics with polyethylene terephthalate (PET) as the main component and cathode components from retired cobalt or manganese oxide lithium-ion batteries as raw materials. Based on the sulfuric acid hydrolysis of waste plastics coupled with sulfuric acid leaching of the cathode material, organic ligands and active metal ions are extracted separately. Cerium ions are further doped to form a bimetallic mixed ion, and finally, the bimetallic organic framework material is prepared through a solvothermal reaction. This material exhibits excellent adsorption activity and can efficiently adsorb and remove low concentrations of toluene and acetone-like organic pollutants from waste gas under medium- and high-temperature conditions. The raw materials of this invention are readily available, and the preparation process fully utilizes the acid hydrolysis process and products of waste plastics, achieving secondary recycling of internal products, significantly reducing the preparation cost of the metal-organic framework material, broadening the high-value resource utilization path of waste plastics and retired lithium-ion batteries, and combining economic advantages with environmental benefits.

The invention relates to a method for recycling a ternary lithium battery material by a water-ionic liquid two-phase system, and mainly solves the problems of low leaching efficiency and high cost in the prior art. The recycling method comprises the following steps: adding the waste ternary lithium battery electrode material into a lithium battery recycling solvent for leaching reaction, and after the reaction is finished, realizing solid-liquid separation through vacuum filtration to obtain a leaching solution rich in valuable metal ions such as Li, Ni, Co and Mn; slowly dropwise adding the leachate into acetone to carry out a back extraction process, separating a metal ion aqueous solution from the ionic liquid, and carrying out Ni, Co and Mn ion concentration regulation on the metal ion solution; separating the mixed solution through a rotary evaporator to respectively obtain acetone and a metal ion aqueous solution; according to the technical scheme, the problems are well solved, and the method can be used for industrial application of recycling the positive electrode of the waste ternary lithium battery.

This invention provides a leaching method for waste ternary cathode material and its application. The method includes the following steps: (1) mixing waste ternary cathode material with a mixed acid solution, reacting, and separating to obtain filtrate and filter residue; wherein the mixed acid solution is a combination solution of hydrochloric acid and organic acid solution; (2) mixing the filter residue with a detergent, washing, and separating to obtain washing liquid and filter cake; (3) mixing the filtrate from step (1) and the washing liquid from step (2) to obtain leaching solution. This leaching method does not require calcination treatment or the addition of external oxidants or reducing agents. With the synergistic effect of hydrochloric acid and organic acids, it not only simplifies the leaching process, reduces recycling costs, and increases economic benefits, but also avoids the pollution of the environment by valuable metals in waste ternary materials. It efficiently realizes the recycling and utilization of waste ternary cathode material, which is of great significance for the low-cost and high-efficiency recycling of waste batteries and the upgrading of industry technology.