1715results about "Photography auxillary processes" patented technology

The invention discloses a composite electrode material for removing uranium through photoelectrocatalysis and a preparation method and application of the composite electrode material, and belongs to the technical field of catalytic materials and wastewater treatment.The preparation method of the composite electrode material comprises the following steps that a ZIF-8 material, copper salt and ferric salt are mixed, and a first metal composite material is prepared; reacting the first metal composite material with a KOH solution to prepare a second metal composite material; carrying out carbonization treatment on the second metal composite material, and then carrying out acid treatment by using acid to obtain a bimetallic atom catalytic material; the preparation method comprises the following steps: dispersing a bimetallic atom catalytic material and a g-C3N4 material in a mixed solution containing phytic acid and a Nafion solution to obtain catalyst ink; and coating the catalyst ink on a substrate, and carrying out illumination drying to obtain the composite electrode material. According to the composite electrode material, under the synergistic effect of the bimetallic single atomic cluster catalyst and g-C3N4, respective advantages are fully exerted, and efficient deposition removal of uranium is achieved.

The invention provides a treatment method of copper-nickel concentrate rich in platinum group metals, which comprises the following steps: feeding the copper-nickel concentrate rich in platinum group metals and a first flux into a smelting furnace, and introducing first oxygen-enriched gas for smelting; copper matte and a second flux are continuously fed into a first converting furnace, and second oxygen-enriched gas is continuously introduced for first converting; raw copper and a third flux are fed into the oxygen inclined blowing rotary converter, and oxygen is introduced for second blowing; the crude copper is fed into an anode refining furnace, and air and a first reducing agent are introduced for fire refining; casting the copper liquid into an anode plate, and carrying out electrolytic refining on the anode plate; feeding the first converting slag, the second converting slag, a second reducing agent and a vulcanizing agent into a dilution electric furnace for slag dilution to obtain low-nickel matte and dilution slag; and the low-nickel matte is fed into a third converting furnace, air or oxygen-enriched air is introduced for third converting, and the problem that the recovery rate of nickel metal elements and platinum group metals in the copper-nickel concentrate rich in the platinum group metals is low is solved.

The invention discloses a process for extracting copper from low-copper-content waste liquid and treating wastewater, and relates to the field of circuit board production waste liquid treatment.The process sequentially comprises the specific steps of waste liquid mixing, electrolytic additive adding, circulating mixing, electrolytic copper extraction, copper ion concentration detection and wastewater treatment. Meanwhile, the equipment universality is high, copper-containing complexes can be degraded, up-to-standard discharge of wastewater can be easily achieved, elemental copper generated in the electrolysis process has certain economic benefits, and the method is suitable for application and popularization.

The invention provides a treatment method for low-grade multi-metal gold concentrate, and relates to the technical field of comprehensive utilization of minerals. According to the treatment method of the low-grade multi-metal gold concentrate, most of iron and copper form iron-copper matte through pyrogenic smelting, meanwhile, gold is captured into the iron-copper matte, then iron-copper matte powder is obtained after water quenching and ball milling, the iron-copper matte powder is subjected to oxidation ammonia leaching, copper in the iron-copper matte is extracted, and the iron-copper matte powder is subjected to oxidation ammonia leaching to obtain the low-grade multi-metal gold concentrate. The obtained copper-containing ammonia leaching liquid is subjected to a traditional extraction-reverse extraction-electrodeposition process to obtain an electrodeposited copper product, ammonia leaching residues obtained after copper extraction are subjected to cyanidation leaching, gold in the ammonia leaching residues is extracted, cyanidation liquid is subjected to a traditional gold extraction process to obtain a gold product, the cyanidation tailings mainly comprise iron sulfide, the content of iron and sulfur in the tailings is high, and the content of sulfur in the tailings is high. And the subsequent cinder can be directly sold as an iron-making raw material. The amount of iron-silicon slag generated by the method is extremely low, and compared with a traditional molten pool smelting method, the comprehensive utilization rate of iron in the multi-metal gold concentrate is greatly increased.

The invention relates to the technical field of metallurgy, in particular to an efficient-utilization copper-cobalt ore dump leaching treatment method which comprises the steps that after copper-cobalt sulfide ore and copper-cobalt oxide ore are subjected to crushing treatment respectively, heap building is conducted; a solution of acidithiobacillus ferrooxidans is added into a sulfuric acid solution to serve as spraying liquid, heap leaching treatment is conducted on the heap-built copper-cobalt ore through a spraying device, and the spraying flow of the spraying device is controlled in the heap leaching treatment process according to changes of the environment temperature and humidity and changes of the pH value of heap leaching liquid; the obtained dump leaching liquid is subjected to extraction-electrodeposition treatment, and cathode metal copper, sediment and raffinate are obtained; and the raffinate serves as spraying liquid to be subjected to spraying circulation, precipitation is neutralized, and metal cobalt is recycled. The spraying flow of the spraying device is accurately controlled and adjusted, and the leaching effect of copper and cobalt metal in the copper-cobalt ore is improved.

The invention provides an impurity removal and recovery method of electrodeposited nickel anolyte, which comprises the following steps: (1) mixing the electrodeposited nickel anolyte with liquid caustic soda, carrying out solid-liquid separation to obtain nickel hydroxide and filtrate, and evaporating the filtrate to obtain sodium sulfate; mixing the electrodeposited nickel anolyte with a nickel source to obtain a mixed solution; (2) mixing the mixed solution with barium salt, and carrying out lead removal treatment; (3) adjusting the pH value of a material obtained after lead removal treatment by using nickel hydroxide to obtain a solution to be subjected to arsenic removal, and mixing the solution to be subjected to arsenic removal with polyferric sulfate for arsenic removal treatment; and (4) a material obtained after arsenic removal treatment is mixed with an oxidizing agent, a solution to be subjected to iron removal is obtained, solid-liquid separation treatment is conducted on the solution to be subjected to iron removal, catholyte with lead, arsenic and iron removed and iron-containing slag are obtained, sodium sulfate is supplemented into the catholyte with lead, arsenic and iron removed, and the catholyte is reused in the nickel electrodeposition process. According to the method, lead, arsenic and iron in the electrodeposited nickel anolyte can be efficiently and rapidly removed and recycled.

The invention discloses a method for recovering nearly all elements in low-precious-metal zinc replacement powder, which belongs to the technical field of non-ferrous metal wet smelting, and comprises the following steps: preparing zinc replacement powder, oxidizing and leaching, extracting copper, preparing cuprous chloride, electrodepositing zinc in raffinate, extracting precious metal by using a gold extracting agent, extracting, reducing and smelting to prepare a gold ingot and a silver ingot, and dissolving by using sodium hydroxide. Preparing lead carbonate; carrying out oxidation acid leaching; replacing; and smelting bismuth. According to the technology for achieving recovery and high-value utilization of nearly all elements in the zinc replacement powder under the mild condition, the technology can be carried out at the normal temperature, the high-pressure condition does not need to be provided, the zinc replacement powder is leached through the acid solution, then various valuable metals are selectively extracted from the leaching solution, corresponding downstream products are prepared, and the method is suitable for industrial production. The method realizes value maximization, does not generate secondary pollution, does not introduce fluorine, has low requirements on equipment, is simple in process and easy to operate, and makes up for the defects of the zinc replacement powder treatment process in the prior art.

The invention discloses a preparation method of a 3-micron ultrathin lithium battery copper foil. The preparation method comprises the following steps: preparing a copper sulfate electrolyte; a wetting agent, a brightening agent and a high resistance agent are added into the copper sulfate electrolyte, the high resistance agent is at least one of thiazolidinethione, polyethyleneimine, 2-mercaptobenzimidazole and ethylene thiourea, and a mixed additive is formed; polishing and grinding a cathode roller by adopting a flying wing wheel, and carrying out electrolytic treatment on the mixed additive through the polished and ground cathode roller to obtain a first-stage copper foil; and the first-stage copper foil is placed in a nitrogen furnace to be subjected to annealing treatment, and the 3-micron ultrathin lithium battery copper foil is obtained. The invention aims to solve the technical problems that in the prior art, edge tearing, foil breaking, warping, dark appearance oxidation and the like are prone to occurring in the production process of the ultrathin copper foil, the tensile strength and the ductility are difficult to consider at the same time, and stable mass production of the 3-micron copper foil is still difficult.

The invention relates to a process for extracting iron from red mud by using hydrogen reduction and electrolysis technologies, the red mud is a by-product generated in the industrial production process of aluminum, the environmental burden caused by the by-product can be solved, the carbon emission can be reduced, and the development of a green metallurgical technology can be promoted. Comprising the following steps: conveying red mud serving as a raw material into a rotary furnace, conveying hydrogen serving as a reducing medium into the rotary furnace, enabling iron oxide in the red mud to form hydrogen reduced iron in a furnace heating state and a hydrogen reducing atmosphere, conveying the red mud containing the hydrogen reduced iron into a sulfuric acid solution, the hydrogen reduced iron is dissolved in the sulfuric acid solution to form a sulfuric acid solution containing iron ions, the sulfuric acid solution containing the iron ions serves as an electrolyte in an electrolysis device, and electrolytic pure iron formed by electrolytic deposition of the iron ions is obtained through the electrolysis device.

The present disclosure relates to the extraction of lithium from liquid resources such as natural and synthetic brines, leachate solutions from clays and minerals, and recycled products. Herein are systems and processes for extracting lithium using ion exchange materials, where transition metal impurities may be removed from the synthetic lithium solution. In some embodiments, the transition metal species are reformulated to form ion exchange materials to be used in the systems and processes described herein.

The invention provides a method for recycling valuable substances and cyanide in cyanide-containing wastewater, and belongs to the technical field of cyanide-containing wastewater treatment. The method comprises the following steps: firstly, carrying out replacement reaction on a physicochemical material (reducing substance zinc) and a copper-cyanogen complex in the cyanogen-containing wastewater to displace copper, and filtering to obtain filter residues containing zinc and copper, so as to realize copper recovery; in the replacement reaction, the copper-cyanogen complex in the filtrate is converted into a zinc-cyanogen complex with a lower stability constant, and then the zinc in the filtrate is recycled by diaphragm electrolysis. The method specifically comprises the following steps: dividing an electrolytic cell into a cathode region and an anode region by utilizing a membrane material, and enabling electrode reactions to be independently carried out, so that cyanide is prevented from entering the anode region to generate electrochemical oxidation and the decomposition of the cyanide is inhibited, and the cyanide is recycled in a solution for cyclic utilization; and then an alkali-resistant titanium-based coating electrode is used as an anode plate, a porous material is used as a cathode plate, recovery of zinc on the cathode plate is promoted, and recovery of valuable metal zinc and copper and cyclic utilization of cyanide are achieved.

The invention provides a method for recovering valuable metals from sulfuric acid process titanium white waste acid through steel slag treatment. The method comprises the following steps: recovering to obtain ferrous sulfate heptahydrate crystals; s2, recovering Sc metal, and extracting the filtrate in the step S1 to obtain a first loaded organic phase and a first raffinate; the first loaded organic phase is washed with alkali liquor, and a second loaded organic phase and washing water are obtained through reverse extraction; treating the washing water to obtain titanium phosphate; back-extracting the second loaded organic phase by using alkali liquor, carrying out filter pressing to obtain crude Sc (OH) 3, and refining to obtain scandium oxide; extracting the first raffinate to obtain a third loaded organic phase and a second raffinate, pickling the third loaded organic phase, reversely extracting with ammonia water, adding phosphoric acid for reaction, and treating to obtain titanium phosphate; and steel slag is added into the second raffinate for neutralization leaching and hydrolysis vanadium precipitation, vanadium-rich slag is obtained through filtering, and then the vanadium electrolyte is prepared. According to the method, iron is separated through crystallization, scandium and titanium are separated through extraction, vanadium-rich slag is separated through neutralization and precipitation, and efficient utilization of resources is achieved.

The invention provides a heavy metal contaminated soil remediation method and device based on directional regulation and control of an electrode array, and the method comprises the following steps: filling heavy metal contaminated soil to be remediated into a soil chamber, and arranging the electrode array in the soil chamber; an electrolyte is added into the cathode chamber and the anode chamber respectively, so that the electrolyte enters the soil chamber, and the moisture content of the soil is maintained to be 20-50%; and under the condition that the pH value of the electrolyte in the cathode chamber and the pH value of the electrolyte in the anode chamber are maintained at 6.0-7.5, bipolar pulse electric fields are applied to the anode and the cathode, so that heavy metal ions in the heavy metal contaminated soil to be remediated are directionally migrated to the surface of the electrode array, and remediation is completed. Moreover, the remediation method and device are simple and convenient to operate, efficient, controllable and environment-friendly remediation of the heavy metal contaminated soil is achieved, good engineering applicability and economical efficiency are achieved, and the green development requirement of the soil remediation technology is met.

The invention belongs to the technical field of wastewater treatment, and provides a method for removing and recovering manganese from acid mine wastewater. The method comprises the steps that the acid mine wastewater is subjected to iron removal treatment to obtain iron removal supernate, a manganese removal agent is added into the iron removal supernate to obtain manganese precipitation residues and manganese removal supernate, the manganese precipitation residues and sulfuric acid are mixed to obtain leaching liquid and leaching residues, and the leaching liquid is electrolyzed to obtain metal manganese; the manganese removal agent is sodium silicate and / or sodium metasilicate. According to the method, the added manganese removal agent does not enable silicate ions and manganese ions to generate manganese silicate, but enables the silicate ions to generate a hydrated calcium silicate adsorbent or a porous magnesium silicate adsorbent in situ with calcium and magnesium ions by using the calcium and magnesium ions existing in the acid mine wastewater, so that the recovery and removal of manganese are realized; the method disclosed by the invention is simple and low in cost, and not only realizes recovery of manganese resources, but also realizes deep treatment of residual manganese; and the leaching residues generated in the manganese recovery stage can also be used for deeply treating the manganese-removed supernate, so that the generation of waste residues is reduced.

To provide a new method in which zinc is collected from a steelmaking dust.SOLUTION: Halogen is removed from a steelmaking dust including zinc and halogen by washing the dust using a cleaning solution. A zinc solution containing the zinc and iron is obtained by dissolving the washed steelmaking dust using an acid. An impurity element contained in the zinc solution is deposited on the surface of the zinc metal by adding the zinc metal to the zinc solution. The iron contained in the zinc solution is deposited as an iron deposit. By electrolyzing the zinc solution with an electrode inside, the zinc contained in the zinc solution is deposited on the surface of the electrode.SELECTED DRAWING: Figure 1

The present invention discloses a method and apparatus for recovering iron from red mud. The specific process is as follows: red mud slurry in the red mud pipeline of the alumina workshop is mineralized, the mineralized red mud slurry is fed into an electrolysis system for electrolysis, the caustic soda concentration in the electrolyte is controlled to be 5-25 mol / L, the electrolysis voltage is between 1.3V and 1.6V, and the red mud slurry temperature in the electrolysis system is maintained between 110-120°C. The electrolysis is stopped after 2-8 hours, and the iron on the cathode of the electrolysis system is stripped and disposed of to obtain a high-purity iron product. Using the present invention, the iron product recovered from red mud is higher in purity, with lower energy consumption and better environmental protection.

The present invention provides a comprehensive extraction method for aluminum, titanium, gallium, and rare earth metals co-existing in coal-bearing strata. This method belongs to the field of mineral extraction technology and addresses the problem that there has been little research on the extraction process of titanium, gallium, aluminum, and rare earth metals from coal gangue and fly ash, resulting in the lack of a mature extraction method. The present invention comprises the following steps: S1, preparation of a roasted product; S2, preparation of a dried pre-calcined mixture; S3, preparation of a calcined mixed product; S4, acid leaching; S5, extraction of rare earths; S6, precipitation; S7, extraction of titanium; S8, extraction; S9, extraction of gallium; S10, extraction of aluminum; and S11, waste liquid treatment. The extraction method of the present invention not only reduces the generation of industrial waste, but also transforms waste into valuables, and is environmentally friendly. Compared with traditional extraction processes for single metal elements, the present invention achieves the comprehensive extraction of multiple metals including aluminum, titanium, gallium, and rare earths through a series of carefully designed steps, thereby improving the efficiency of raw material utilization.

The present invention belongs to the technical field of fly ash resource recycling and utilization, and relates to a method for the synergistic extraction of aluminum, lithium, gallium, and scandium from fly ash. The method comprises the following steps: (S1) pretreatment: adding fly ash to an aqueous solution of an inorganic base, subjecting it to microwave irradiation, and then pressurizing and activating it to obtain a pretreated product; (S2) graded acid leaching: subjecting the pretreated product to primary acid leaching in hydrochloric acid to obtain leachate I and a Si-rich residue I; subjecting the Si-rich residue I to secondary acid leaching in a mixed solution of hydrochloric acid and choline chloride-urea to obtain leachate II and a Si-rich residue II; and (S3) separation and purification: comprising selective adsorption of Ga / Sc / Fe by ion exchange resin, Ca removal and Al / Li separation, step-by-step resin elution, Ga / Sc extraction and separation, Ga stripping, and electrolysis. The present invention achieves efficient synergistic extraction and full resource utilization of aluminum, lithium, gallium, and scandium from fly ash, and the entire process has low energy consumption.

The invention relates to the field of recycling of lithium ion batteries, and discloses a method for recycling valuable metals in a failed lithium battery. The method comprises the following steps: (1) carrying out reaction on the nickel-cobalt-manganese slag and concentrated sulfuric acid, carrying out water leaching on the obtained slurry, and carrying out solid-liquid separation to obtain a cobalt-manganese leaching solution and nickel slag; (2) extracting the cobalt-manganese leachate, carrying out reverse extraction on the obtained organic phase to obtain a manganese sulfate solution, and then carrying out evaporative crystallization to obtain manganese sulfate; the extracted raffinate is subjected to evaporative crystallization, and cobaltous sulfate is obtained; and (3) the nickel slag obtained in the step (1), an acid solution and hydrogen peroxide are subjected to a catalytic oxidation reaction, an obtained nickel sulfate solution is subjected to electro-deposition treatment, and nickel is obtained. According to the method, the recovery rate and purity of the valuable metal are improved, the recovery process of the valuable metal of the lithium battery is simplified, the whole process is environmentally friendly, near-zero discharge of wastewater is achieved, and the investment cost is low.

This invention belongs to the field of photovoltaic recycling, specifically relating to a method for the comprehensive recycling of waste photovoltaic modules, comprising: disassembling waste photovoltaic panels to separate photovoltaic laminates, aluminum frames, and junction boxes; crushing the photovoltaic laminates to obtain photovoltaic crushed material; subjecting the photovoltaic crushed material to a decomposition reaction to break down the EVA adhesive into non-adhesive molecules; sorting the decomposition reaction-treated photovoltaic crushed material to separate glass, plastic backsheets, and copper powder to obtain a silicon powder mixture; dissolving the silicon powder mixture to obtain a silver-containing solution and silicon powder precipitate; separating the silicon powder precipitate and converting the silver-containing solution into elemental silver for recycling. This invention performs in-depth processing based on physical sorting, further purifying the silicon powder while obtaining valuable metallic silver, increasing economic benefits, reducing recycling costs, and achieving efficient and green recycling of photovoltaic modules.

The invention discloses a method for recovering rare earth and valuable metal from waste rare earth alloy by using ionic liquid, and belongs to the technical field of non-ferrous metal metallurgy. Comprising the following steps that (1) recycled waste rare earth alloy is smashed, and waste rare earth alloy powder is obtained; (2) the waste rare earth alloy powder is put into ionic liquid to be subjected to a leaching reaction, solid-liquid separation is conducted after leaching is completed, and solid rare earth salt and filtrate are obtained; and (3) the filtrate serves as electrolyte, an electrolytic deposition system is constructed for electrodeposition, and valuable metal is obtained. The recovery method also has the advantages of simple process, environmental friendliness, high purity of the regenerated electrolyte and stable performance, and has great popularization and application prospects.

The invention discloses a rare earth metal electrolysis system and an electrolysis furnace thereof, and relates to the technical field of metallurgy, the rare earth metal electrolysis system is characterized by comprising a potential data acquisition and preprocessing module, a dendritic crystal feature extraction and quantification module, a dendritic crystal identification and intelligent determination module and an inverse pulse control and dynamic regulation module, in the electrolysis process, potential distribution original data of the surface of a rare earth metal cathode are detected and collected in real time, the obtained original data are preprocessed, and a preprocessed potential data set is established based on a time sequence. According to the method, intelligent, real-time and accurate inhibition of dendritic crystals in the rare earth metal electrolysis process is achieved, short circuit, splashing and electrode ablation are effectively prevented, the compactness and purity of metal deposition are improved, the current efficiency is remarkably improved, and compared with a traditional scheme, the method has the advantages of being high in real-time performance, good in inhibition effect, small in interference and high in adaptability, and the method is suitable for popularization and application. And efficient and safe preparation of the rare earth metal is ensured.

The invention provides a method for comprehensively recovering valuable metals from liquid purified by an antimony-based adsorbent, and belongs to the field of hydrometallurgy. The method comprises the following steps: (1) primary electrodeposition copper removal; (2) primary purification and impurity removal; (3) secondary electrodeposition copper removal; (4) secondary purification and impurity removal; (5) diffusion dialysis; (6) neutralizing to remove iron; (7) nickel precipitation by oxalic acid; and (8) roasting to obtain the high-purity nickel oxide powder. The treated object is the copper electrolyte subjected to purification and impurity removal through the antimony-based adsorbent, and the content of arsenic, antimony and bismuth impurities is remarkably reduced. By means of the method, it can be guaranteed that the quality of electric copper reaches the A-level copper standard, meanwhile, generation of highly toxic H3As gas is avoided, the comprehensive utilization efficiency of valuable metal resources in purified liquid is high, and the method is suitable for industrial application of copper electrolyte purification.

In the present method and device for producing metal powders, an electrolyte solution is exposed to an electrochemical potential and ultrasonic vibrations in a thin-layer sonoelectrochemical cell with a sacrificial anode, and powder particle sizes are controlled by controlled limitation of the dwell time of electrolyte solution containing already-formed particles in the thin-layer sonoelectrochemical cell. Limitation of the dwell time within the thin-layer sonoelectrochemical cell is achieved by the continuous controlled circulation of electrolyte solution from a settling cell through the thin-layer sonoelectrochemical cell, in the process of which formed particles with predetermined sizes settle to the bottom of the settling cell. The powder production rate is 400 g / h or more. The production cost of the powder is of an order less than that of similar powders produced by chemical reduction, which is the most widely used technique to date, while production waste is several orders less.

The invention relates to an efficient separation and comprehensive recovery method based on copper-nickel complex platinum-palladium concentrate. The efficient separation and comprehensive recovery method comprises the following steps: (1) smelting and enriching; (2) carrying out two-stage cascade blowing enrichment; (3) stage selective crystallization; (4) separating mixed ore; (5) selective separation of alloyed gold; (6) separating copper-nickel bulk concentrate; and (7) mixing the nickel sulfate crystal obtained in the step (5) and the nickel oxide obtained in the step (6), feeding the mixture into a reverberatory furnace, smelting to obtain a nickel anode plate with crude nickel as a main component, and then feeding the nickel anode plate into an electrolysis process for electrolysis to obtain cathode nickel, anode mud and silver-cobalt slag products. According to the method, valuable metals such as platinum, palladium, gold, silver, copper, nickel and cobalt in the complex platinum-palladium concentrate can be efficiently separated and recovered, the separation effect is good, the comprehensive recovery rate is high, comprehensive recycling of resources is fully achieved, the problems that an existing recovery process is poor in recovery effect and high in cost are solved, and good economic benefits and social benefits are achieved.

The present application relates to the manufacturing technical field of aero-engine blisk, in particular to an integrated forming machining method for blisk machining, which combines abrasive water jet rough machining, electrolytic machining and self-adaptive polishing machining to form an integrated machining method. First, the characteristics of the theoretical model of the blisk part are analyzed, simplified and reconstructed to build a water jet machining process model of the blisk. Then, the abrasive water jet equipment is applied to remove the material of the rough machining of the blade body. After that, the double-sided feeding electrolytic finishing method is determined to machine the blade body and the flow channel of the blisk. Then, the blade body and the flow channel are machined by a sand belt robot. Finally, the precision machining of the blisk is completed. The present application combines the advantages of abrasive water jet rough machining, electrolytic machining and self-adaptive polishing machining, re-plans the machining method and technical path of the blisk, effectively reduces the machining difficulty of the part, finally guarantees the dimensional accuracy and position accuracy of the part, and realizes the high-performance manufacturing and machining of the blisk.

The invention discloses a method for recycling insoluble manganese in electrolytic manganese residues. The method comprises the steps that the electrolytic manganese residues are crushed and finely ground; mixing the manganese slag with water, stirring and washing, and carrying out solid-liquid separation through filtering equipment; adding a magnetizing agent and an auxiliary agent into the washed filter residue, and carrying out magnetizing roasting; the roasted material is cooled to the room temperature, and then water is added to prepare ore pulp with the concentration being 20%-30%; the ore pulp sequentially passes through a magnetic separation device; a 10%-20% sulfuric acid solution is used as a leaching agent, the magnetic concentrate and the leaching agent are stirred and leached in a reaction kettle, and the solid-to-liquid ratio is 1: 3-1: 5; the leaching liquid and the leaching residues are separated through filtering equipment; an oxidizing agent is added into the leachate, and the pH value of the leachate is adjusted to 4-5; concentrating the leachate, adding ammonium sulfate to form an electrolyte, and feeding the electrolyte into an electrolytic bath for electrolysis; and after electrolysis is finished, a manganese metal product is obtained from the negative plate. And the recovery efficiency and benefits of insoluble manganese in the electrolytic manganese residues are effectively improved.

Described are Redox Flow Lithium Extraction (RFLE) technologies for fast, high- purity lithium obtention in the forms of LiCl, LiOH, Li2CO3, and lithium metal from geothermal seawater or brine or other lithium sources. The REEL cells described herein are multi-component systems utilizing Li+ ion conducting solid-state electrolyte (LiCSSE) membranes and anion exchange membranes (AEMs) within arrangements of flow cells continually supplied with redox shuttle molecules (RSM) to maintain charge balance within the system. The described systems and methods therefore achieve a continuously flowing system for obtaining high-purity lithium from diverse lithium sources. Relatively high lithium extraction rates are obtained through these described systems and methods with relatively low cost and high longevity compared with existing and legacy technologies. The systems and methods described herein provide an environmentally low impact solution for lithium extraction.

The invention discloses a comprehensive recovery method of a low-grade multi-metal material. The comprehensive recovery method comprises the following steps: smelting the low-grade multi-metal material in a reinforced smelting furnace; smelting slag enters the echelon reduction volatilization furnace to be smelted; mixing soot obtained by smelting with the waste zinc electrolyte to obtain pulpified liquid; flue gas obtained by smelting and pulpified liquid are subjected to a contact reaction, and the reacted liquid is subjected to gas-liquid separation; carrying out contact reaction on the flue gas obtained after gas-liquid separation and the liquid again; extracting indium from the obtained lixivium by adopting P2O4; adding tannin into liquid after indium extraction to precipitate germanium; and adding alkali liquor into the germanium-deposited solution to neutralize and recover gallium. According to the method, the low-grade multi-metal material is sequentially subjected to echelon oxygen-enriched enhanced reaction smelting, continuous oxidation desulfurization leaching and scattered metal wet recovery by adopting an efficient smelting method, so that the energy consumption is reduced, the smelting efficiency is improved, the recovery rate of metals such as germanium is improved, the resource recovery rate is improved under the condition of relatively low energy consumption, and the economic benefit is increased. And the method has good social and economic benefits.

The invention provides a preparation method of 7N ultrahigh-purity copper, which comprises the following steps: taking 4N copper as an anode, placing the anode in a diaphragm bag, taking a first titanium plate as a cathode, taking a copper nitrate solution as an electrolyte, and carrying out pre-electrolysis; and after the pre-electrolysis is finished, a second titanium plate serves as a cathode, electrolyte circulating electrolysis is conducted, the section of the second titanium plate is in a trapezoid shape, the long edge of the trapezoid is close to the bottom of the electrolytic bath, and the 7N ultra-high-purity copper is obtained after electrolysis is finished. According to the preparation method provided by the invention, the overall purity of the electrolytic copper product obtained at the cathode can reach 7N or above, the purity and the component uniformity of the ultra-high-purity copper product are improved, and the problems of non-uniform copper purity and low yield caused by the fact that the purity of copper close to the bottom of an electrolytic bath in an existing electrolysis method does not reach the standard are solved; the yield of ultra-high pure copper products is improved to 100%, the material utilization rate and the production capacity are improved, and the product cost is reduced.