1508 results about "Metal recycling" patented technology

The invention belongs to the technical field of recycling of electronic waste lithium ion batteries, and particularly relates to a method for separating and recycling valuable metal elements from waste lithium ion batteries and regenerating a positive electrode material. The invention provides a method which innovatively combines a deep eutectic solvent and mechanochemical activation and is used for efficiently separating and recycling valuable metal elements from waste lithium ion batteries and regenerating a positive electrode material. According to the method, efficient leaching of the waste positive electrode material and effective separation of valuable metal elements of lithium, nickel, cobalt and manganese are achieved through the synergistic effect of high dissolving capacity of the eutectic solvent and mechanochemical activation. The mild and efficient method is adopted, the problems that a deep eutectic solvent is complex to prepare and difficult to store, the leaching condition of a positive electrode material is harsh, and the consumption of a metal recovery reagent is large are solved, and high-selectivity leaching of lithium ions and separation and recovery of valuable metal elements of nickel, cobalt and manganese are achieved.

The invention provides lithium and aluminum hydroxyfluoride extraction equipment and a low-grade cathode carbon block recovery process, and relates to the technical field of metal recycling, the lithium and aluminum hydroxyfluoride extraction equipment comprises a bracket, a tank body, a mounting plate, a driving mechanism, a reciprocating mechanism, a water washing liquid discharging mechanism and an acid leaching liquid discharging mechanism; the tank body is installed in the support, a top plate is installed at the top end of the tank body through bolts, and a supporting frame is installed on the upper surface of the top plate through bolts. According to the scheme, a layer of pickle liquor is covered and injected after water washing liquid enters, so that the two extracting solutions can be added in a laminated manner, and the water washing liquid and the pickle liquor are quantitatively added in the laminated adding process, so that layered mixing is realized in the adding process of the device, and the efficiency of the device is improved. According to the device, the subsequent stirring time can be shortened, electric power is saved, meanwhile, it is guaranteed that two kinds of liquid are mixed more sufficiently and stably, and meanwhile the internal alkaline balance can be guaranteed through a stacked adding mode.

A power generator is described that provides at least one of electrical and thermal power comprising (i) at least one reaction cell for reactions involving atomic hydrogen products identifiable by unique analytical and spectroscopic signatures, (ii) a molten metal injection system comprising at least one pump such as an electromagnetic pump that provides a molten metal stream to the reaction cell and at least one reservoir that receives the molten metal stream, and (iii) an ignition system comprising an electrical power source that provides low-voltage, high-current electrical energy to the at least one steam of molten metal to ignite a plasma to initiate rapid kinetics of the reaction and an energy gain. In some embodiments, the power generator may comprise: (v) a source of H2 and O2 supplied to the plasma, (vi) a molten metal recovery system, and (vii) a power converter capable of (a) converting the high-power light output from a blackbody radiator of the cell into electricity using concentrator thermophotovoltaic cells with plasma light recycling or (b) converting the energetic plasma into electricity using a magnetohydrodynamic converter.

The invention discloses a method for extracting valuable metals from black powder of waste lithium ion batteries, and belongs to the technical field of recycling of waste lithium ion batteries. According to the method, valuable metals are extracted from the waste lithium ion battery black powder by adopting low-temperature roasting and water leaching, the waste lithium ion battery black powder is taken as a raw material, sulfamic acid is taken as a roasting agent, the waste lithium ion battery is pretreated, and roasting for carbon removal, metal extraction and water leaching are performed in sequence, so that the valuable metals are obtained. And leaching liquid and leaching residues containing two or more elements of lithium, nickel, cobalt, manganese, iron and aluminum are obtained and are used for further purification and recovery of valuable metals. According to the method provided by the invention, the influence of aluminum dissolution on recovery of other metals is reduced, the use of hydrogen peroxide is avoided, the process flow is shortened, the process cost is greatly reduced, the roasting and water leaching processes cannot corrode equipment, and the whole process cannot generate waste acid to cause secondary pollution.

The invention relates to the technical field of precious metal recovery, in particular to a precious metal recovery method which comprises the following steps: I, crushing a waste catalyst, blending the waste catalyst with sodium carbonate according to the weight ratio of 1: (0.5-1.2), and roasting at 700-1000 DEG C for 0.5-3 hours to obtain a roasted product; and II, dispersing the roasted product and sodium hydroxide in the weight ratio of (0.2-0.5): 1 in water at the temperature of 50-90 DEG C, stirring at the rotating speed of 80-320 r / min for 5-20 min for leaching, filtering while hot after leaching is finished, and collecting, washing and drying filter residues to obtain the recovered noble metal. According to the recycling method, the precious metal is efficiently recycled from the high-carbon-content catalyst by accurately controlling parameters of all the steps, and compared with a traditional recycling method, the recycling rate is remarkably increased, the influence on the environment is reduced, and meanwhile the production cost is reduced.

A method comprises planarizing a substrate material with a functionalized chemical planarization pad. The functionalized chemical planarization pad includes a plurality of functional groups bonded to a material of the pad. The functional groups are configured to chemically react with the substrate material such that a portion of substrate material bonds to the functional groups. The pad is regenerated by applying a regeneration solution configured to break bonds between the functional groups and substrate material bonded to the functional groups to form removed material. The removed material is complexed in a dissolved complexing agent to form dissolved material in an effluent phase.

The invention discloses an infrared heating detinning device for waste circuit boards, which belongs to the technical field of metal recovery and comprises a detinning drum, the detinning drum comprises a driving drum seat, an infrared heating drum and a dynamic conveying frame are arranged at one end of the driving drum seat, and a static conveying frame is arranged on the inner wall of the other end of the driving drum seat. A slag discharging mechanism is arranged at the bottom of the infrared heating cylinder; according to the invention, the sealed continuous production of the waste circuit board is realized, the waste heat preheating is utilized to improve the detinning efficiency, the detinning rotary drum and infrared heating are combined to dynamically rotate to promote tin melting and element falling, the vibrating screen and the guide plate screen tin, the vibration and high-temperature blowing cleaning of the element are realized, and the external air draft and temperature control filter pipe accurately controls the solidification and remelting of the tin; the air injection cushion and the sealing arc plate guarantee sealing and cleaning, the whole process is efficient in detinning, elements are separated, and energy and production efficiency are improved.

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 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 provides a self-heating tempering and valuable metal partition recycling method for copper smelting slag. The method comprises the steps that S1, a slag tempering agent is prepared from industrial sulfate waste and a low-cost carbonaceous reducing agent; s2, in the copper smelting matte smelting deslagging process, a tempering agent is added into molten slag, and phase adjustment reaction is completed through latent heat of the molten slag; s3, after the slag is slowly cooled, classifying the upper part and the lower part of materials in the slag ladle, and performing conventional crushing, ore grinding and flotation on the upper part to recover valuable metals; and S4, the lower part of sulfonium-rich slag enters a direct return smelting system or is crushed and levigated, and then copper concentrate is recycled through magnetic separation-reverse flotation. According to the copper smelting slag self-heating tempering and valuable metal partition recycling method, synergistic low-carbon treatment is conducted on copper smelting slag and sulfate waste residues according to the concept of treating waste with waste, the method has the advantages of being high in metal recycling rate, low in cost, environmentally friendly, simple in process and material and the like, good economic benefits and environmental benefits are achieved, and the industrial popularization difficulty is small.

The invention relates to the technical field of rotational flow electro-deposition, in particular to a process for treating metal-containing waste liquid by adopting a rotational flow electro-deposition technology, which comprises the following steps: removing particulate matters from the metal-containing waste liquid through a filtering device, and then recycling metal from the filtered metal-containing waste liquid through a rotational flow electro-deposition device. The rotational flow electro-deposition device comprises an electrolytic tank body, an anode shell and a plurality of cathode columns rotating synchronously, waste liquid forms rotational flow under the action of a spiral diversion trench, and metal ions are efficiently deposited on the surface of a cathode. By adopting the spiral diversion trench and the synchronously rotating cathode column structure, the waste liquid forms rotational flow in the electrolytic bath, so that the electrodeposition area of the cathode is increased, the uniform deposition of metal ions is promoted, the metal recovery efficiency and purity are improved, the manual operation intensity is greatly reduced through the cooperative control of the motor, the electric cylinder and the vacuum pump, and the production cost is reduced. The automation level of the process is improved, and the maintenance time of the cathode column is shortened.

The invention discloses a method for recovering metal from high-nickel copper fire refining slag and application of the method, and relates to the technical field of metal metallurgy. Comprising the following steps: carrying out weak acid arsenic leaching on the copper fire refining slag to obtain arsenic-removed leaching slag and arsenic-containing copper liquid; copper removal is carried out on the arsenic-containing copper liquid to obtain a copper-containing material and copper-removed liquid, and arsenic precipitation is carried out on the copper-removed liquid; the arsenic-removed leaching residues are subjected to oxidation copper leaching to obtain copper leaching residues and a copper sulfate solution, and the copper leaching residues are subjected to reduction vulcanization smelting to obtain nickel matte, tin-antimony smoke dust and smelting residues. According to the method, the cost of separation of copper and arsenic in the raw materials can be reduced, the problem of furnace caking caused in the reduction smelting process is avoided, the obtained copper sulfate solution serves as electrolyte replenishing liquid to be applied to the copper electrolysis process, and the influence on the self-purification process of electrolyte is small. According to the method, nickel and copper are enriched in matte nickel through reduction vulcanization smelting, then copper-nickel separation is conducted through the post-treatment process, the post-treatment process is shorter, nickel recovery is achieved while copper recovery is guaranteed, and better economic benefits are achieved.

The invention discloses a recycling method of a waste lithium-ion power battery negative electrode material, which comprises the following steps: deconstructing the waste battery negative electrode material through selective plasma electrolysis, separating organic matters and electrolyte to obtain untreated negative electrode powder, and drying the untreated negative electrode powder to obtain the waste lithium-ion power battery negative electrode material. The powder is refined into uniform particles by adopting a supercritical fluid cooling and crushing technology, the physical structure of the powder is kept, metal elements such as lithium, nickel and cobalt are extracted by utilizing a multi-frequency resonance auxiliary ion exchange technology, impurities are removed, further purification is performed by adopting a superconducting magnetic separation technology and a nanoscale aerosol separation technology, and a high-purity metal solution is generated; metal compounds are generated through an intelligent self-adaptive phase change precipitation technology and are reduced into recyclable metal materials through biological catalytic deposition, the whole recovery process is monitored and optimized through a closed-loop circulation intelligent feedback system, the metal recovery rate is maximized, and harmless treatment is ensured.

The invention belongs to the field of electronic wastes, and particularly relates to a waste circuit board recycling and reusing method which comprises the following steps: step 1, a preliminary decomposition stage of a waste circuit board: decomposing the waste circuit board into fragments suitable for follow-up treatment through a mechanical crushing and screening physical method; 2, a chemical leaching stage: dissolving metal components in the waste circuit board from the fragments by using a chemical solvent; 3, a metal recovery and separation stage: reducing metal ions dissolved in the solution into metal by adopting an electrolytic method; step 4, a harmful substance removal stage: removing harmful substances in the waste circuit board; 5, a resource reutilization and comprehensive utilization stage: through a recovery system unit, the recovered metal, plastic substrates and electronic component materials are extracted and utilized, and a feedback control system optimizes the resource recovery efficiency according to real-time data; and step 6, closed-loop treatment and environment-friendly compliance stage: treating wastewater, waste gas and solid waste through a closed-loop system unit.

The invention belongs to the technical field of scattered metal recovery, and particularly relates to a recycling method of tungsten-rhenium alloy waste. The tungsten-rhenium alloy is a solid solution strengthened alloy which takes tungsten element as a matrix and consists of the tungsten element and rhenium element, and has the characteristics of high melting point, high strength and high hardness. As the price is high, it is very necessary to comprehensively utilize the tungsten-rhenium alloy waste. The invention discloses a recycling method of tungsten-rhenium alloy waste. Firstly, tungsten-rhenium alloy waste is cleaned, dried and smashed, and waste powder is formed; then dispersing the waste material powder into water dissolved with ammonium metatungstate and a surfactant; then, carrying out spray drying to form mixed powder; and finally, the mixed powder is subjected to roasting and hydrogen reduction, and tungsten-rhenium alloy powder with the metal rhenium content lower than the metal rhenium content in the tungsten-rhenium alloy waste is formed. Compared with an existing tungsten-rhenium alloy waste recycling method, the recycling method has the advantages of being simple in process, low in energy consumption, small in loss and good in uniformity.

The invention relates to the technical field of battery regeneration, and discloses a waste lithium battery regeneration system based on an ultrasonic-assisted leaching structure, which comprises a leaching part, the leaching part comprises a kettle body, the top end of the kettle body is hermetically connected with an upper gland, and the upper gland is rotatably connected with a rotating shaft through a hollow shaft fixed in the upper gland; the rotating shaft is provided with a stirring structure for uniformly mixing materials through a sliding chute formed in the bottom end of the rotating shaft; and generating ultrasonic waves. The waste lithium battery regeneration system based on the ultrasonic-assisted leaching structure can effectively solve the problems that in the prior art, part of waste lithium batteries are still kept in large blocks due to insufficient preliminary crushing, the crushed products of the waste lithium batteries sink to the bottom of a reaction kettle due to high density, materials are seriously stacked, and the waste lithium batteries cannot be recycled. The problems that the leaching efficiency is reduced and the metal recovery rate is low due to the fact that valuable metal in the large-particle lithium battery broken product is difficult to make full contact and react with a leaching agent are solved.

The invention relates to the technical field of comprehensive utilization of industrial waste residues, in particular to an electrochemical high-valued method of steel slag. The method comprises the following steps: providing an electrochemical device which comprises a power supply, a cathode, an anode and an electrolyte, and fixing steel slag near the anode in the electrochemical device; the electrochemical device is subjected to water electrolysis treatment, so that the steel slag releases metal cations and forms precipitates through reaction, and calcium cations in the metal cations react with carbon dioxide absorbed by the electrochemical device to form calcium carbonate. The method provided by the invention is carried out in a single reactor, does not need high temperature and high pressure, and does not involve addition of other chemical reagents, so that the existing steel slag carbon sequestration and metal recovery technology is greatly simplified, the efficiency of the existing method is improved, the economic and environmental burden is reduced, and efficient carbon sequestration and metal recovery of the steel slag are realized in the same system.

The invention discloses environment-friendly laser cutting equipment and method for waste metal recycling, and belongs to the technical field of metal recycling and processing devices and methods.The environment-friendly laser cutting equipment comprises a first conveying line and a second conveying line, and the first conveying line and the second conveying line are arranged in parallel up and down; the first conveying line and the second conveying line are arranged on the frame, extend in the preset direction and are used for bearing and conveying metal. The first cleaning and pressing mechanism comprises a first motor arranged on the first conveying line, an output shaft of the first motor passes through the first conveying belt and extends to the second conveying belt, one end of the second conveying belt is in transmission connection with a first rotating wheel, and one end of the first rotating wheel extends to the first cleaning roller. The technical problems that when a metal plate is bent, the flatness of the metal plate is poor, orderly cutting operation is not facilitated, personnel operation is not facilitated in the manual cleaning process, and the working efficiency is reduced are solved.

The invention relates to a method for preparing electrolytic nickel through normal-pressure and high-pressure combined leaching of high-nickel matte, and belongs to the technical field of metal separation and enrichment. The method for preparing the electrolytic nickel through normal-pressure and high-pressure combined leaching of the high-nickel matte mainly comprises the steps of raw material preparation, normal-pressure leaching, solid-liquid separation, high-pressure reaction, metal recovery, impurity removal treatment and filtration and electrodeposition. According to the method for producing the electrolytic nickel through normal-pressure leaching and pressure leaching of the high-nickel matte, the risk that impurities are increased due to the fact that other production auxiliary materials are used is reduced, in the leaching process, steam, compressed air, normal pressure and pressure are optimized and combined innovatively, and leaching of nickel in the high-nickel matte is increased to the maximum extent. Black nickel generated in a production system is used for removing cobalt for the first time, it is guaranteed that the nickel content in the system reaches the standard while impurities are not increased, and meanwhile anode liquor obtained after electrodeposition enters an initial slurrying tank to be recycled.

Metal recovery and separation systems and methods, more particularly electrothermal chlorination (ETC) and electrothermal carbochlorination (ETCC) methods and systems for selective metal extraction, such as extraction of key metals from waste streams. Alternatively, other oxidizing agents, such as fluorine, bromine or iodine, may be used in place of or in combination with chlorine. Further, or other reducing agents, such as a metal (0), such as tin (0), and H2 (H2 included in argon, such as 1% to 5% by volume of H2 in argon, may be used in place of or in combination with carbon. Embodiments of the invention may utilize ETC to selectively recover In from ITO-containing waste, and utilize ETC in combination with ETCC to recover Ta from capacitor waste.

The invention discloses a method for recovering valuable metals in a retired ternary lithium battery based on cascade separation of a deep eutectic solvent and oxalic acid. The method comprises the following steps: 1) stirring and leaching the deep eutectic solvent and black powder at 110-130 DEG C for 3-4 hours according to a liquid-solid ratio of (5-50): 1 (ml: g) to obtain a leaching solution; (2) measuring the contents of lithium, cobalt, nickel and manganese in the leachate according to ICP (Inductively Coupled Plasma), adding oxalic acid exceeding the required amount according to the contents of lithium, cobalt, nickel and manganese, stirring, standing, and centrifuging to obtain a precipitate mixture of nickel oxalate precipitate, cobalt oxalate precipitate and manganese oxalate precipitate and lithium filtrate; and (3) repeating the steps (1)-(2) for at least three times by taking the lithium filtrate obtained at each time as the eutectic solvent, performing rotary evaporation on the obtained final lithium filtrate, adding sodium carbonate, and centrifuging to obtain lithium carbonate precipitate. The purity of the ternary lithium precursor prepared from cobalt, nickel and manganese obtained through the method can reach 99% or above, the purity of obtained lithium carbonate reaches 95% or above, and closed-loop recycling is achieved.

The invention provides equipment for leaching tin from tin-containing waste residues and a method for enriching and recovering tin through the equipment, and relates to the technical field of metal recycling. The equipment comprises a base, an end cover, a mounting base, a driving motor, a leaching mechanism, a feeding pipe and a discharging pipe; a heating base is installed on the top of the base, a tank body is installed in the heating base, and the end cover is installed at the top end of the tank body in a sealed mode through bolts. According to the device, water and solids in the tank body are stirred up and down when rotating eddy current is switched to ascend and descend, mixed acid and tin-containing waste residues can be conveniently stirred and mixed in a layered mode, and due to the fact that the mixed acid is added into the tank body through the acid adding pipe at the fixed position, the mixed acid can be more rapidly dissolved with the tin-containing waste residues after being added, and the stirring efficiency is improved. And if rotation is conducted in the direction of one degree of freedom for a long time, heat can be concentrated in the corresponding vortex layers, heat in the tank body can be evenly layered through lifting type auxiliary movement, heat concentration can be avoided, and high efficiency and safety in the leaching process are guaranteed.

The invention provides a method for recovering copper and diluting matte converting slag through self-heating collaborative smelting, and relates to the field of metal recovery. The method comprises the steps that liquid copper matte converting slag generated in the copper smelting process is directly discharged into a hot-state collaborative smelting furnace, multi-source copper-based solid waste subjected to coarse crushing and mixing is added, collaborative smelting is carried out under the oxygen-enriched air condition, and collaborative smelting comprises the melting period, the dilution period and the standing period; in the melting period, copper, aluminum, iron, lead and tin in the copper-based solid waste are quickly melted to form first crude copper; in the depletion period, aluminum and iron in the first crude copper and organic matter in the copper-based solid waste serve as reducing agents to reduce oxides of copper, nickel, cobalt, zinc and lead in the matte converting slag into metal states, the metal states enter the first crude copper to form second crude copper, and after being oxidized, the iron and the aluminum enter the matte converting slag to form second slag; and in the standing period, a reducing agent is added, air blowing is ended, third crude copper and third slag are formed after standing, and a crude copper product is collected.

The utility model discloses a tool sharpener base provided with a metal separator, which comprises a grinder base and the metal separator, a water chute is arranged in the grinder base, a water outlet communicated with the water chute is arranged on the grinder base, the metal separator is fixed on the grinder base, and the metal separator is fixed on the grinder base. A water inlet is formed in the side, connected with the grinding machine base, of the metal separator, the water inlet is communicated with a water outlet, the water outlet is formed in the connecting position of the grinding machine base and the metal separator, the metal separator is directly fixed to the grinding machine base, the metal recovery function is added for the grinding machine, the occupied space is effectively saved, and the service life of the grinding machine is prolonged. And convenience is provided for later cleaning.

The invention discloses an electrochemical separation and recovery method for multiple metals. The method comprises the following steps: providing an electrolytic bath with a cation exchange membrane; the electrolytic cell is divided into a cathode chamber and an anode chamber by the cation exchange membrane; providing a cathode and an anode; preparing an electrolyte solution; placing a multi-metal-containing thiosulfate leachate, a chlorate and an anode in the anode chamber, and placing the electrolyte solution and a cathode in the cathode chamber; and voltage is applied to the cathode and the anode, and after the reaction is completed, base metal deposited on the cathode and precious metal deposited on the anode are recycled respectively. The electrolysis device provided with the cation exchange membrane is adopted, precious metal complex ions and other metal ions are separated and stored in different electrolysis chambers under the action of an electric field, precious metal is recycled at the anode and other metal is recycled at the cathode by further combining chemical and electrochemical actions, and the separation and purification process of the metal recycling process can be shortened.

The invention discloses a method for recovering and separating nickel, cobalt and manganese from waste ternary lithium ion battery material lithium extraction slag, which comprises the following steps: pulping waste ternary battery material lithium extraction slag, leaching, introducing compressed air as an oxidant, and carrying out solid-liquid separation after leaching to obtain a leachate and leaching slag; sequentially performing copper removal, iron removal, aluminum removal and fluorine removal on the leachate to finally obtain fluorine-removed liquid; carrying out refined filtration on the fluorine-removed liquid to obtain a refined-filtered liquid; adjusting the pH value of the finely filtered liquid, and extracting impurities by using nickel soap P204 to obtain a rich organic phase and raffinate 1; extracting manganese from the raffinate 1 by using nickel soap P204 to obtain a manganese-rich organic phase and raffinate 2; extracting cobalt from the raffinate 2 by using nickel soap P507 to obtain a cobalt-rich organic phase and raffinate 3; and carrying out evaporative crystallization on the raffinate 3 to obtain nickel sulfate. The whole process has the advantages of short flow, high metal recovery rate, high product quality and low sodium-containing wastewater treatment capacity, and nickel, cobalt, manganese and lithium elements in the waste ternary lithium ion battery material are efficiently recycled by combining a front-end lithium extraction and recovery process, so that resource circulation is realized.

The invention belongs to the field of genetic engineering and resource recycling, and relates to a ferrous oxide recombinant bacterium, a recombination method and application of the ferrous oxide recombinant bacterium in lithium battery metal recovery. The ferrous oxide recombinant bacterium is obtained by taking thiobacillus ferrooxidans as an original strain through genetic engineering modification; comprising thiobacillus ferrooxidans, an exogenously introduced nickel / cobalt efflux protein RcnA gene, a vector pJRD215 and donor bacteria, and the nickel / cobalt efflux protein RcnA gene is introduced into the vector pJRD215, driven to express and then introduced into the donor bacteria to express. The application of the constructed and prepared ferrous oxide recombinant bacteria in lithium battery metal recovery is used for improving the leaching efficiency of metal ions Co < + > or / and Li < + > or / and Ni < + > in lithium battery powder; and the method shows good adaptability and stability under different substrate concentrations, and provides a key experimental support and an important experimental basis for application of a microbial enhanced leaching technology in the field of waste lithium battery resource utilization.

The invention relates to the technical field of metal recovery and extraction, and discloses a method for recovering metal in a slurry bed residual oil hydrogenation waste catalyst, which comprises the following steps: (1) taking the slurry bed residual oil hydrogenation waste catalyst as a raw material, and introducing water vapor and oxygen while heating to obtain a waste catalyst; (2) mixing the obtained waste catalyst with an alkaline reagent A and water, heating, leaching and filtering to obtain filtrate I; (3) adding an alkaline reagent B into the filtrate I, and adjusting the pH value to 8.0-11.0 to obtain filtrate II; (4) cooling and standing the filtrate II to separate out an ammonium metavanadate solid and obtain a filtrate III; (5) removing the filtrate III by using anion exchange resin to obtain molybdenum-rich filtrate; and (6) adjusting the pH value of the molybdenum-rich filtrate to be acidic, and performing evaporative crystallization to obtain a molybdic acid solid. After the slurry bed residual oil hydrogenation waste catalyst is subjected to high-temperature treatment in the presence of water vapor and oxygen, metal is leached and recovered by adopting alkali liquor, the process is simple, and the recovery rate is high.

The invention relates to the technical field of metal recovery, and discloses waste steel slag recycling treatment equipment which comprises a base, a first baffle and a second baffle are installed on the upper portion of the base through a support, a limiting column is fixed between the first baffle and the second baffle, and a roller is installed outside the limiting column in a sleeving mode. And a mounting sleeve is fixedly connected to the exterior of the first baffle, an outer sleeve is mounted on the exterior of the mounting sleeve in a sleeving mode, and the roller penetrates through the interior of the first baffle. According to the waste steel slag recycling treatment equipment, steel slag can be ground in the process that the steel slag is placed in the grinding box and a rotary cover plate drives a grinding roller to rotate eccentrically, the ground steel slag slides down through a filter screen, the steel slag can be ground into particles, metal iron and impurities in the steel slag are separated, and the waste steel slag is recycled. And the situation that impurities adhere to metal iron, and consequently energy is consumed during follow-up metal refining is avoided, and therefore the efficiency during metal separation is improved.

The invention discloses a device and a method for recycling gold ions in copper ammonia thiosulfate leachate, and belongs to the technical field of hydrometallurgy and precious metal recycling. An anode chamber and a cathode chamber which are physically and spatially isolated are built, so that the reduction reaction of the gold ions is only carried out in the cathode chamber, and only the oxidation reaction of metal zinc is carried out in the anode chamber. In order to avoid deposition of copper ions in the gold ion reduction process, before gold deposition, the existence form of the copper ions is regulated and controlled, Cu (NH3) 4 < 2 + > in a solution is converted into Cu (S2O3) 35 <-> which is difficult to deposit, then gold deposition is carried out, and after gold deposition is completed, the Cu (S2O3) 35 <-> in the solution is recovered to Cu (NH3) 4 < 2 + > by means of regulation and control of an electrochemical method. And the solution after gold ion deposition can be returned to the leaching stage for recycling under the condition that the copper ion concentration is not interfered.