95results about "Copper sulfates" patented technology

The invention belongs to the technical field of waste battery recovery, and particularly relates to a short-process method for recovering battery-grade lithium carbonate and valuable metals from waste ternary lithium battery black powder. According to the method, a lithium closed-loop technical system of blank roasting, cyclic leaching, synergistic impurity removal, lithium phosphate aluminum removal, directional extraction and split-flow extraction of lithium, nickel and magnesium and seed crystal induction parallel flow lithium precipitation is constructed, a roasting aid, a reducing agent and an aluminum removal agent do not need to be added in the whole process, and the redundant processes of traditional lithium carbonate purification such as carbonization, resin purification and pyrolysis are omitted; the lithium liquid concentration cost is saved, no hazardous waste exists, green and clean production is achieved, and the quality of battery-grade products is guaranteed through collaborative impurity removal and directional extraction.

The invention discloses a method for preparing copper sulfate from PCB etching liquid, and belongs to the technical field of PCB etching liquid treatment.The method comprises the following steps that alkaline PCB etching waste liquid and acidic PCB etching waste liquid are mixed to obtain basic copper chloride precipitate; reacting the basic copper chloride precipitate with concentrated sulfuric acid to obtain a copper sulfate crude product; adding a hydrogen peroxide solution into the copper sulfate crude product solution, stirring and reacting for 0.5-2 hours, adding a precipitator to adjust the pH value to 3.5-4, and carrying out solid-liquid separation to obtain an impurity-removed solution; the impurity removal solution is introduced into an adsorption column filled with modified activated carbon, then evaporation concentration, cooling crystallization and reduced-pressure suction filtration are carried out, and copper sulfate is obtained.According to the method, the processes of acid-base neutralization, oxidation impurity removal, adsorption impurity removal and recrystallization are adopted, and the low-cost and efficient recovery and purification technology is achieved; and the recovery efficiency is improved to the maximum extent and the cost is controlled while the high purity of the product is ensured.

The invention discloses a device for preparing copper sulfate from waste etching liquid. The device comprises a box body, wherein a separation chamber, a reaction chamber and a concentration chamber are sequentially arranged inside the box body from bottom to top, the separation chamber and the reaction chamber being connected via a connecting pipe. A buffer tank and a plurality of filter tanks are fixed on the top of the box body and are connected via a connecting pipe to the top of the concentration chamber. The concentration chamber is provided with a heating pipe. A stirring assembly is provided on one side of the reaction chamber. An extraction assembly is provided on the top of the separation chamber. A concentrated sulfuric acid tank is provided on one side of the box body and is connected via a connecting pipe to the top of one side of the reaction chamber. A fan is provided on the other side of the box body and is connected to the top of one side of the separation chamber. An air outlet pipe is also provided and is connected to the tops of the concentration chamber and the separation chamber, respectively. The air outlet pipe is connected to a purifier. Several of the connecting pipes are provided with flow meters and solenoid valves.

The invention provides a collaborative recovery method for directionally converting SO2 into waste tire cord steel wires, and belongs to the technical field of solid waste recycling. According to the collaborative recovery method provided by the invention, the granular waste tire cord steel is roasted in an SO2 / O2 / N2 mixed atmosphere and an air atmosphere in sequence, and then the valuable metal components copper, zinc and iron in the waste tire cord steel wire are directionally converted into copper sulfate, zinc sulfate and iron oxide through further leaching and magnetic separation processes. According to the method, efficient recovery and resource utilization of valuable metal components of copper, zinc and iron in the waste tire cord steel wires are achieved, an innovative solution is provided for high-value utilization of the waste tire cord steel wires, and the method has good application prospects and social and ecological benefits.

The utility model discloses a cathode protection copper sulfate evaporator, which is characterized in that a plurality of anodes are arranged in the copper sulfate evaporator, the anodes are inserted in a copper sulfate solution in the copper sulfate evaporator, and the anodes, a cathode binding post and a reference electrode are all connected with a constant potential controller; the constant potential controller, the anode, the copper sulfate solution in the copper sulfate evaporator and the copper sulfate evaporator body form a current loop, the controller outputs direct current, and the protection potential of the equipment is changed by automatically controlling the magnitude of the output direct current until the potential of the equipment reaches the protection potential ranging from-0.1 V to-0.6 V; a cathode protection anti-corrosion technology is applied to the copper sulfate evaporator, uniform corrosion and pitting corrosion caused by high-temperature dilute sulphuric acid and high-concentration chloride ions of equipment materials in a copper sulfate solution are prevented, the corrosion speed is reduced, and the service life is prolonged.

The utility model relates to the technical field of crystallization tanks, in particular to an energy-saving rapid crystallization tank for producing copper sulfate pentahydrate, which comprises a tank body, a tank cover is fixedly mounted at the top ends of two sliding rods, a rotating rod is rotatably mounted on the lower surface of the tank cover, mounting blocks are fixedly sleeved on the rotating rod at equal intervals, mounting ports are symmetrically formed in the surfaces of the mounting blocks, and the mounting ports are fixedly connected with the tank cover. A rotating shaft is horizontally and rotatably mounted in the mounting opening, stirring rods are fixedly connected to the rotating shaft in a sleeving manner, and every two adjacent stirring rods are hinged through a hinge rod; the top end of the rotating rod is sleeved with a sliding block in a threaded mode, connecting rods are fixedly installed on the left side wall and the right side wall of the sliding block, and abutting rings are fixedly installed at the bottom ends of the two connecting rods. When the rotating rod drives the plurality of stirring rods to rotate, one ends of the plurality of stirring rods can also rotate up and down in a reciprocating manner, so that the stirring amplitude of the stirring rods is increased, the stirring is not only the rotation in a single direction any more, and the crystallization efficiency is improved.

The invention discloses a method for recovering metal from electronic waste or leach residue thereof, the electronic waste or leach residue comprising copper element and one or more lithium compounds, the method comprising: leaching the electronic waste or leach residue with a leaching solution comprising ammonium sulfate in the presence of an oxidizing agent, a leaching solution containing copper ions and lithium ions and solid residues are provided; and separating the leachate and the solid residue.

The invention discloses a continuous crystallization method and system of copper sulfate pentahydrate and a copper sulfate pentahydrate crystal, and the method comprises the following steps: S1, tangentially adding a supersaturated solution of copper sulfate pentahydrate from the bottom of a cyclone fluidized bed crystallizer to form a rotationally rising flow field in the crystallizer; s2, adding a copper sulfate pentahydrate seed crystal to enable the seed crystal to be in a suspended and fluidized state and grow; s3, mixing the copper sulfate pentahydrate mother liquor with supplemented fresh feed liquid, treating to form a supersaturated solution of the copper sulfate pentahydrate again, and returning to the step S1 for circulation; s4, process parameters of continuous crystallization are controlled, and the ratio of the feeding flow Qm to the mother liquor circulation flow Qc is not larger than 3.56%; s5, maintaining the void ratio epsilon of the bed layer to be 0.7 or above by leading out a crystal product; according to the invention, stable and continuous operation can be realized, crystal breakage and secondary nucleation are reduced, and high-purity copper sulfate pentahydrate crystals with large particle size, uniform particle size distribution and regular morphology are obtained; the production efficiency is high and the energy consumption is low.

The invention relates to the industrial fields of metallurgy, electronics and the like, and provides an acid waste liquid and waste gas treatment method which comprises the following steps: step 1, injecting an acid waste liquid into a reaction container, sequentially adding lime powder and light calcium carbonate to carry out neutralization reaction, adjusting the pH value to 4-6.5, precipitating a copper-containing compound, and carrying out solid-liquid separation to obtain copper slag and filtrate; 2, concentrating and crystallizing the filtrate in the step 1 to prepare calcium chloride; reacting the copper slag with sulfuric acid to generate copper sulfate; and thirdly, the acid waste gas is introduced into an incinerator and incinerated at the temperature of 800-1000 DEG C, and incineration tail gas containing SO2 is generated. The copper recovery rate in the waste liquid is greater than or equal to 98%; the waste gas sulfur recovery rate is larger than or equal to 99.99%, the sulfuric acid yield is larger than or equal to 96%, waste liquid-waste gas-product closed-loop circulation is achieved, waste liquid is utilized by the incinerator for neutralizing waste heat, and energy consumption is reduced by 30%. The catalytic oxidation unit adopts a honeycomb Pt catalyst, the pressure loss of the system is reduced by 40%, and the operation stability is improved.

The invention provides a copper sulfate water-cooling crystallization tank, and relates to the technical field of water-cooling equipment, the copper sulfate water-cooling crystallization tank comprises a tank body, the tank body comprises a first conveying pipeline and a second conveying pipeline, the first conveying pipeline comprises a top platform and a water pipe, and the surface of the top platform is provided with a passing gap for the water pipe to pass through; a sealing device is arranged on the outer side of the passing notch and comprises a second sealing assembly located on the inner side and a first sealing assembly located on the outer side, the first sealing assembly and the second sealing assembly are both detachably connected with the top platform, and the second sealing assembly comprises a second cover plate and a sealing ring. A first cavity is formed in the first sealing assembly. A double-layer sealing structure can be formed on the inner water jacket and the outer side of the water jacket, a better protection effect can be achieved while maintenance is facilitated, liquid leakage is avoided, and continuous production is guaranteed.

The invention discloses a preparation method of a high-conductivity multivalent nanowire and application of the high-conductivity multivalent nanowire to a non-enzyme glucose sensor. The copper nanowire with a high length-diameter ratio is prepared, a certain amount of thiourea is directly added into an ethanol solution of the copper nanowire, and conversion from the copper nanowire to the high-conductivity multivalent nanowire can be achieved under the condition of a specific reaction temperature. In the conversion process, the surface of the nanowire is synchronously induced to form a coarse structure, non-single valence copper sulfide active sites are constructed, and the formed synergistic effect can remarkably increase the number of the active sites, reduce an electrocatalytic oxidation reaction energy barrier and strengthen the specific adsorption capacity of glucose molecules, so that the non-enzyme glucose sensor is manufactured. The sensor shows ultrahigh detection sensitivity, ultralow response speed and excellent anti-interference performance, the preparation process is extremely simple, the cost is low, and the sensor has remarkable technical advantages and wide application prospects in the field of quantitative detection of glucose.

The invention relates to the technical field of wastewater treatment, and discloses a treatment process of sulfur-free and iron-free copper-containing wastewater and application of the treatment process in copper sulfate recovery, the process comprises the following steps: (1) physically filtering the copper-containing wastewater, adjusting the pH value to be less than 4, carrying out oxidation pretreatment, and feeding the copper-containing wastewater into an ion exchange system; and (2) after adsorption, introducing the wastewater into an adsorber containing adsorption particles, applying a magnetic field, carrying out solid-liquid separation, detecting that Cu < 2 + > in the liquid is less than 0.5 mg / L, adjusting the pH value to be neutral, and then discharging. Compared with a traditional copper-containing wastewater treatment process, a polypeptide magnetic adsorption step is added behind an ion exchange system, when Cu < 2 + > in the ion exchange system is about 50 mg / L, Cu < 2 + > is transferred into an adsorber for magnetic adsorption, and the wastewater treatment period can be greatly shortened. In the recovery process of the copper sulfate, the concentration of Cu < 2 + > in the copper-containing wastewater desorption solution is high, and the concentration of impurity ions is low, so that the subsequent recovery and purification process of the copper sulfate is simplified, and the cost is reduced.

The utility model relates to the technical field of waste liquid treatment, and particularly discloses a comprehensive treatment system for copper-containing waste liquid, which comprises an acidic copper-containing waste liquid tank, an alkaline copper-containing waste liquid tank, a synthetic reaction tank, a filter press, a copper recovery system, a neutralization tank, an intermediate tank, an ion exchange device, a heat exchange device, a second evaporator and a crystallization device, the acidic copper-containing waste liquid tank and the alkaline copper-containing waste liquid tank are both connected with the synthetic reaction tank, the output end of the synthetic reaction tank is connected with the filter press, and the residue output end of the filter press is connected with the copper recovery system, so that residues containing basic copper chloride are conveyed to the copper recovery system. The copper recovery system is used for recovering copper elements in basic copper chloride; the filtrate output end of the filter press, the neutralization tank, the intermediate tank, the ion exchange device, the heat exchange device, the second evaporator and the crystallization device are connected in sequence. According to the device, copper resources can be recycled, solid ammonium salt can be prepared, and the reutilization rate of the resources is improved.

The invention relates to a method for preparing large-particle copper sulfate from circuit board copper-containing waste liquid through crystallization, which comprises the following steps: S1, adding an oxidizing agent into the waste liquid, adding alkali to adjust the pH value to 2-3.5, filtering, adding sulfuric acid, heating and boiling to obtain a primary purified solution; s2, performing multi-stage counter-current extraction on the solution obtained in the step S1 by using a copper extraction agent, and then performing reverse extraction by using concentrated sulfuric acid to obtain copper sulfate reverse extraction liquid; s3, taking part of the copper sulfate strip liquor obtained in the S2, and carrying out rapid cooling or spray granulation to obtain copper sulfate fine grains; s4, carrying out sectional controllable evaporative crystallization on the copper sulfate strip liquor obtained in S2 to obtain copper sulfate crystals; and S5, washing and drying the copper sulfate crystal to obtain a final product. The copper sulfate crystal obtained by the method for preparing the large-particle copper sulfate from the copper-containing waste liquid of the circuit board through crystallization is large in particle size, the average particle size can reach 0.5-2.0 mm, the particle size distribution is concentrated, the crystal form is complete, and the purity is high.

This application pertains to methods of recovering metals from metal sulfides that involve contacting the metal sulfide with an acidic sulfate solution containing ferric sulfate and a reagent that has a thiocarbonyl functional group, wherein the concentration of reagent in the acidic sulfate solution is sufficient to increase the rate of metal extraction relative to an acidic sulfate solution that does not contain the reagent, to produce a pregnant solution containing the metal ions.

The present invention provides a method for producing iron phosphate and a method for producing lithium iron phosphate. The method for producing iron phosphate includes the steps of: uniformly mixing sulfate slag and sulfite with water to obtain a first mixture; adding phosphoric acid and a buffer to the first mixture to perform a leaching reaction; performing a first solid-liquid separation on the slurry obtained after the leaching reaction to obtain a first filtrate and a first filter cake; introducing air into the first filtrate to perform a first stirring reaction; performing a second solid-liquid separation on the slurry obtained after the first stirring reaction to obtain a second filtrate and a second filter cake; and calcining the second filter cake, the pressure of the leaching reaction is 0.25-0.5 MPa, the time is 1-2 hours, the pH of the reaction system of the leaching reaction is 1.5-3, and the buffer includes sodium dihydrogen phosphate and / or disodium hydrogen phosphate. The method for producing iron phosphate utilizes an iron source in sulfate slag, which can reduce the production cost of iron phosphate and is simple and easy to operate.

This invention provides an automatic copper oxide powder addition device and method for FCBGA packaged substrate electroplating. The method includes: a vibration device vibrating the container to prevent copper oxide powder from clumping; and a monitoring device monitoring the measurement results of the weighing structure and the sensing results of the photosensitive sensor to control the transfer of copper oxide powder. This invention, by incorporating a vibration device in the container, prevents the copper oxide powder added during the FCBGA packaged substrate electroplating process from clumping before entering the dissolution tank, avoiding blockage caused by excessively low copper ion concentration or copper oxide powder precipitation on the product surface, thereby improving product yield. Simultaneously, the photosensitive sensor monitors the copper oxide powder level, preventing abnormal measurements by the weighing structure that could lead to excessive addition of copper oxide powder, thus improving the accuracy of the copper plating amount in the dissolution tank. Furthermore, the weighing structure, displacement structure, and filter circulation pump work together to move and clean the weighing structure after adding copper oxide powder, further improving the accuracy of the copper plating amount in the dissolution tank. Finally, the use of a protective cover prevents copper oxide powder from splashing out when entering the dissolution tank.

The utility model discloses a kind of copper supplementing structure of spray copper dissolving tank, including the copper supplementing pipeline connected with spray copper dissolving tank, the copper supplementing pipeline is connected with at least two liquid inlet pipelines, adjacent liquid inlet pipeline is connected in parallel by connecting pipeline, the liquid inlet pipeline is communicated with the sewage pump in corresponding low tank, first control valve is mounted on the liquid inlet pipeline, second control valve is mounted on the connecting pipeline, cancel the original multiple copper supplementing pumps, using the suction of sewage pump original sewage pump Low-concentration copper electrolyte is sucked into liquid inlet pipeline, and the free switching of multiple liquid inlet pipelines can be realized by setting multiple control valves, so that the supply of different amounts of low-concentration copper electrolyte is realized.

The invention discloses a preparation method and application of high-purity copper sulfate, and the preparation method comprises the following steps: reacting ammonia water with a copper chloride solution to obtain basic copper chloride; adding sulfuric acid into the basic copper chloride for dissolving, and removing impurities to obtain an acidic impurity-removed solution; reacting the acidic impurity removal liquid with the alkaline impurity removal liquid to obtain basic cupric carbonate and / or copper oxide; and adding sulfuric acid into the basic cupric carbonate and / or copper oxide for reaction, and cooling and crystallizing to obtain the high-purity copper sulfate. According to the preparation method of the high-purity copper sulfate, metal, nonmetal and other impurities in the raw materials can be removed, the impurity removal effect on trace impurities is obvious, new impurities are not introduced in the preparation process, the process is simple, industrial production can be achieved, and the obtained high-quality copper sulfate can be applied to the electroplating liquid and has good application prospects. Especially in the fields of electroplating of precision elements sensitive to impurities and semiconductors.

The present patent of invention belongs to the technical field of material analysis for determining chemical properties and it is characterized by comprising a kit for determining the level of hair damage, including a reagent to be used and a reference scale containing a defined damage scale. Furthermore, the present patent also provides a method for using the kit, comprising the following steps: (i) determining Einitial (indicating the color value in the CIELAB space) of the hair sample using a spectrophotometer, for example, before performing desired hair treatments such as bleaching, blow-drying, coloring, among others; (ii) submerging the sample, for example, after the desired treatments, in copper sulfate present in the kit for one to three minutes; (iii) determining, using the spectrophotometer, the Efinal of the sample after reaction with the reagent; (iv) calculating delta E (Einitial − Efinal); and (v) comparing the result with the reference damage scale that forms part of the kit and defines at least three levels of damage.

The invention provides a comprehensive recovery method for valuable metals in smelting waste acid, and relates to the technical field of hydrometallurgy. The method comprises the steps that smelting waste acid is heated and then mixed with a sulfur-containing substance, a sulfur-containing compound is introduced, copper and rhenium in the smelting waste acid are selectively separated, and copper-rich rhenium slag and liquid obtained after copper and rhenium precipitation are obtained; the copper-rich rhenium slag is leached, and a leaching solution is obtained; and extracting the leachate to obtain a loaded organic phase and raffinate, carrying out reverse extraction on the loaded organic phase to obtain ammonium rhenate, and carrying out evaporative crystallization on the raffinate to obtain copper sulfate. Compared with the prior art, the precipitation rate of rhenium can be improved, selective separation of copper, rhenium and arsenic in the waste acid is achieved, the production cost of enterprises is reduced, and the economic benefits of the enterprises are improved.

The utility model relates to the technical field of electrolytic copper foil production, and discloses an efficient dissolved copper circulating device which comprises a dissolved copper tank body, a feeding assembly is arranged at the top of the dissolved copper tank body, a tank cover is fixedly connected to the top of the dissolved copper tank body, a partition plate is fixedly connected to the interior of the dissolved copper tank body, and a water inlet is formed in the partition plate. An overflow opening is fixedly connected to the bottom of the partition plate, an overflow outlet is fixedly connected to the bottom of the overflow opening, a first liquid cavity is formed in the copper dissolving tank body, a second liquid cavity is formed in the bottom side of the interior of the copper dissolving tank body, a third liquid cavity is formed in the top end of the interior of the copper dissolving tank body, and a liquid pumping pipe is fixedly connected to the top of the tank cover. A liquid pumping assembly is arranged at the bottom of the liquid pumping pipe, and a center pipe is fixedly connected to the bottom of the right side of the liquid pumping pipe. According to the utility model, air in the electrolyte is split into small bubbles through the separation net, so that sulfuric acid and air are in full contact with the surface of a copper material, and the reaction is more sufficient and efficient.

The present application relates to a kind of low copper-containing waste liquid low-temperature evaporation drying crystallization depth electrolytic copper method, belong to industrial waste liquid resource processing technical field.The method is aimed at circuit board industry brownification-copper mixed waste liquid, sequentially carries out pretreatment, gradient negative pressure evaporation concentration, crystallization drying purification, adaptability pulse electrolysis and full-process recycling post-processing.By evaporation concentration, no chemical reagent is achieved, and low organic residue crystal is obtained by crystallization purification, and depth electrolysis is carried out using customized pulse electrolysis parameters and additives.The present application replaces traditional chemical breakage, avoids secondary pollution, and realizes efficient recovery of copper resources.The purity of final electrolytic copper is ≥99.95%, the total recovery rate of copper is ≥96.8%, the energy consumption per ton of copper is significantly reduced, the production of hazardous waste containing copper is reduced by more than 95%, the condensate reuse rate is ≥80%, and excellent environmental and economic benefits are achieved.

The utility model relates to the technical field of copper electroplating waste liquid recovery, in particular to a copper electroplating waste liquid copper sulfate recovery device which comprises a copper sulfate electroplating bath, a temporary storage tank, a heat exchanger, a factory service end ice water machine, a separator, a crystal collecting tank and a volatilization air exhaust dryer. An outlet of the copper sulfate electroplating tank is communicated with an inlet of the temporary storage tank, an outlet of the temporary storage tank is connected with an inlet of the heat exchanger, the heat exchanger is communicated with the factory service end water chiller, cold water of the factory service end water chiller circulates in the heat exchanger, and a filter screen is arranged at the bottom of the heat exchanger and communicated with the dilute waste liquid collecting tank. The copper electroplating wastewater discharge is improved, copper sulfate is separated out and purified through low-temperature crystallization and collected, waste liquid reduction and resource recovery are achieved, the environmental protection effect is optimized, meanwhile, a novel copper sulfate pentahydrate on-line auxiliary recovery process is constructed, simple recovery equipment is additionally arranged on the basis of the original copper electroplating process, and the copper electroplating wastewater is recycled. A waste reduction target can be achieved by invested a small amount of money, and the environment-friendly wastewater treatment cost is greatly reduced.

The invention belongs to the technical field of rare metal hydrometallurgy, and particularly relates to a method for deeply removing tungsten and molybdenum in a copper sulfate solution. According to the method, a copper sulfate solution and a sulfur source are mixed for a tungsten-molybdenum precipitation reaction, precipitation residues and impurity removal liquid are obtained after solid-liquid separation, and the copper sulfate solution contains tungsten-molybdenum impurities; the impurity removal liquid is subjected to adsorption deep impurity removal through ion exchange resin, a pure copper sulfate solution is obtained, the concentration of tungsten trioxide in the pure copper sulfate solution is smaller than or equal to 10 mg / L, and the concentration of the molybdenum element is smaller than or equal to 10 mg / L. According to the method provided by the invention, deep removal of tungsten and molybdenum in the copper sulfate solution is realized, and the tungsten and molybdenum concentrations in the copper sulfate solution can be reduced to 10 mg / L or below; meanwhile, the method provided by the invention does not use dangerous chemical reagents, is environment-friendly, lays a foundation for subsequent preparation of high-purity copper products, and is more suitable for industrial application.

The present invention discloses an acid etching liquid waste liquid treatment device, which relates to the field of etching technology, and includes a collector and an intermittent rotating component. A powder collecting chamber is opened in the middle of the collector, and a scraper is fixedly installed on the upper end of the inner wall of the powder collecting chamber. During the use of the present invention, the intermittent rotation power of the rotary disk of the present application is derived from the downward pressure of the piston rod during the upper mold closing process. Not only is the waste liquid in the pump cylinder pressurized by the downward pressure of the piston rod, so that the waste liquid is sprayed onto the surface of the rotary disk by the spray pipe connected to the end of the one-way liquid outlet pipe, but also the displacement drive of the crossbeam is realized by a driving pin that moves synchronously with the piston rod, and then the ninety-degree intermittent rotation of the lower rotary disk is driven by the linkage component, leaving enough heating time for the waste liquid sprayed on the rotary disk surface to volatilize its internal moisture and hydrogen chloride gas, and the remaining copper sulfate crystal powder is collected in the powder collection box after being fully dried.

The invention belongs to the field of comprehensive utilization of resources, and discloses a method for extracting copper and selenium step by step through low-temperature sulfating roasting of copper anode slime. The method comprises the steps that the copper anode slime and sulfate are evenly mixed, and first-stage sulfating roasting is conducted at the temperature of 200-350 DEG C; the obtained roasted product is subjected to water leaching, and a copper sulfate solution and water leaching residues are obtained; and mixing the water leaching residues with sulfate, carrying out second-stage sulfating roasting at 450-550 DEG C, and collecting selenium-containing oxide. According to the method, first-stage low-temperature sulfating roasting is carried out, the copper anode slime reacts with sulfate to generate metal sulfur oxide, copper exists in the roasted product in the form of copper sulfate, separation of copper and other elements can be achieved through water leaching, the purpose of preferentially extracting copper is achieved, and the copper recovery rate can reach 94% or above; second-stage low-temperature sulfating roasting is carried out, water leaching residues react with sulfate to generate selenium oxide, selenium volatilizes in the form of gas, separation of selenium and other elements can be achieved through collection, and the volatilization rate of selenium can reach 97% or above.

The utility model discloses a copper sulfate mother liquor purification device which comprises a support, a treatment device is arranged on the support, the treatment device comprises a treatment tank, a tank cover, a rotating shaft, a scraping plate, a scraping block and a material mixing plate, the treatment tank is installed on the support, the tank cover is installed at the top end of the treatment tank, the rotating shaft is arranged in the treatment tank, and the scraping plate is connected to the outer side of the bottom end of the rotating shaft. The scraping block is installed on the outer side of the material mixing plate, the material mixing plate is installed on the outer side of the rotating shaft, a heating device is installed on the outer side of the treatment tank, a separation device is arranged below the treatment tank and comprises a separation bin, a treatment bin, a conveying pipe, a conveying bin, a flow guide block and filtering holes, the treatment bin is arranged below the treatment tank, and the separation bin is installed in the treatment bin; the conveying pipe is connected to one side of the conveying bin, the conveying bin is arranged on one side of the treatment bin, the flow guide block is installed in the separation bin, and the filter holes are formed in one side of the separation bin.

The invention belongs to the technical field of smelting recovery, and particularly relates to a method for high-value utilization of tungsten and molybdenum in molybdenum removal slag. The method comprises the following steps: slurrying the molybdenum-removed slag, and carrying out oxygen pressure acid leaching to obtain a leachate and tungsten-molybdenum-enriched slag; evaporating and concentrating the leachate to obtain a copper sulfate product; dissolving the tungsten and molybdenum enriched slag with ammonia water to obtain a mixed solution of ammonium tungstate and ammonium molybdate; the method comprises the following steps: diluting a mixed solution of ammonium tungstate and ammonium molybdate, adjusting the pH value with acid, carrying out multistage countercurrent extraction to obtain an ammonium molybdate solution, and carrying out acid precipitation crystallization on the ammonium molybdate solution to prepare an ammonium molybdate product; the obtained extraction saturated organic phase is subjected to multi-stage reverse extraction with an ammonium bicarbonate aqueous solution, and molybdenum reverse extraction liquid and the remaining extraction organic phase are obtained; and carrying out reverse extraction on the residual extracted organic phase to obtain an ammonium tungstate solution, and preparing an ammonium paratungstate product. By means of the method, copper, tungsten and molybdenum in the molybdenum removal slag can be separated, and copper sulfate, ammonium molybdate and ammonium paratungstate products are obtained; toxic and harmful gases are not generated, and the method is safe, environment-friendly and more suitable for industrial application.

Provided is a method for recovering a precursor metal for secondary cell cathode material using synergistic solvent extraction applied with extractant degradation preventing technology including: (a) leaching a low grade MHP and sulfuric acid by high temperature and high pressure oxidation reaction; (b) separating a solution leached by the oxidation reaction and precipitant of an impurity containing iron (Fe); (c) recovering copper as copper sulfate solution by solvent extraction from the leached solution of (b); (d) precipitating and removing some impurities by injecting a neutralizing agent into a raffinate after solvent extraction of cooper in (c); and (e) recovering zinc, cobalt, and nickel from a solution from which some impurities are removed in (d) by means of the synergetic solvent extraction (SSX) to be selectively separated as a raffinate containing manganese, calcium, and magnesium.