57 results about "Zinc electrowinning" patented technology

The utility model discloses an electrolytic zinc sheet receiving and stacking device, and belongs to the technical field of electrolytic zinc sheet stacking. The stacking machine comprises a conveying belt device, a conveying wheel device, a push rod device and a stacking box device. The conveying belt device is installed on the front side of the conveying wheel device, and the push rod device and the stacking box device are installed on the left side and the right side of the conveying wheel device. According to the utility model, the conveyor belt device is arranged at a zinc sheet stripping outlet, and the zinc sheet with an inclined direction can be blocked by the limiting baffle plate to adjust the posture after being conveyed to the conveying wheels by the conveyor belt, and then is pushed to the forklift plate in the stacking box by the push rod to be flattened. The stripped zinc sheets can be tidily stacked on the forklift plate after being subjected to the operation, the problems that the zinc sheets are bent, folded, irregularly arranged and the like in the stacking process are solved, the production efficiency is effectively improved, and the efficiency of the whole production process of the zinc sheets is guaranteed.

The utility model relates to a recyclable cathode plate cross beam for electrolytic zinc, which belongs to the field of cross beams and comprises a cross beam body, a positioning component is mounted on the cross beam body, a plug-in component is mounted on the cross beam body, and the positioning component comprises two hanging lugs clamped with the top of the cross beam body. And the bottoms of the two hanging lugs are each fixedly provided with two clamping concave blocks, the top of the cross beam body is provided with a clamping rod, and the interior of the cross beam body is fixedly provided with two conductive blocks. According to the recyclable cathode plate cross beam for electrolytic zinc, by installing the positioning assemblies, when the hanging lugs and the cross beam are welded, the hanging lugs can be preliminarily limited and installed, rapid welding of the hanging lugs and the cross beam body is facilitated, the welding efficiency and quality are improved, by installing the inserting assemblies, the hanging lugs can be conveniently fixed, and the practicability is high. The connecting strength between the hanging lugs and the cross beam is greatly improved, the cross beam is not prone to fracture along a welding seam in the using process, and the service life of the cross beam is prolonged.

The invention discloses a method for producing cuprous oxide by utilizing low-grade purified copper slag in a zinc hydrometallurgy process, and belongs to the technical field of purified copper slag. The invention relates to a method for producing cuprous oxide by utilizing low-grade purified copper slag in a zinc hydrometallurgy process. The method mainly comprises the following steps: acid leaching and impurity removal; the pre-leached filter residues are mixed with dilute sulphuric acid, air is introduced to serve as an oxidizing agent for oxidation leaching, after leaching, the pH is adjusted to 4.0-5.0 through CaCO3, and copper-containing leaching liquid is obtained through filtering; adding dextrose monohydrate into the copper-containing leachate, and adjusting the pH value by using NaOH; according to the method, through the closed-loop process of acid presoaking impurity removal, air oxidation leaching, glucose reduction and cuprous oxide Cl <-> removal, conversion from harmless treatment to resource high-value utilization of the low-grade copper slag is achieved, air is used for replacing KMnO4, MnO2 and other chemical oxidants, the cost is reduced, no harmful by-product exists, the green metallurgy requirement is met, and the method is suitable for industrial production. The prepared cuprous oxide is directly used for removing Cl <-> from a supernatant in electrolytic zinc, and the double contradiction of copper slag dilution and high cost of a Cl <-> removing agent in the industry is solved.

The invention discloses a method for determining sulfate radicals in an ammonia chloride process electrolytic zinc solution, and relates to the technical field of solution ion content determination, and the method comprises the following steps: adding a precipitator into a sample solution to generate a barium sulfate precipitate; adding a magnesium source and a chelating agent, titrating by using a standard chelating agent solution under the condition that the pH value is 9-11 and the end point is indicated by an indicator, and measuring the volume V2 of the consumed chelating agent; taking the same amount of sample solution, indicating the end point by using the indicator under the same pH value, titrating by using the standard chelating agent solution, and measuring the volume V3 of the consumed chelating agent; carrying out a blank experiment, and measuring the volume V1 of the consumed chelating agent; and calculating the content of sulfate radicals in the electrolytic zinc sample solution according to V1, V2, V3, the volume V of the sample solution and the concentration of the standard chelating agent solution. According to the method, the influence of a zinc matrix, calcium and magnesium is quantitatively eliminated, so that the determination result is highly matched with the actual content, and the color change of a titration end point is sharper by adding a magnesium source.

The utility model discloses a zinc sheet stacking device based on an automatic zinc stripping machine, and belongs to the technical field of electrolytic zinc sheet stacking devices. The device comprises a chute device, a transfer device and a stacking device, the chute top of the chute device is mounted at the discharge port of the receiving box, the transfer device is arranged at the chute bottom of the chute device, and the stacking device is arranged at the rear end of the transfer device. According to the automatic zinc stripping machine, zinc sheets are conveyed through the chute device by means of the gravity of the zinc sheets, a plurality of processes of zinc sheet stacking of an original automatic zinc stripping machine are omitted, complexity and failure rate in the zinc sheet stacking process are reduced, production efficiency and stability are improved, meanwhile, due to the fact that the roller conveying belt is arranged, production efficiency is improved, and production cost is reduced. And long-distance stable transportation of zinc sheets can be guaranteed, and meanwhile, the device can adapt to different site conditions.

The utility model relates to a hoisting device for a zinc plate, and relates to the technical field of electrolytic zinc. A zinc plate lifting device comprises a lifting frame and lifting hooks, and the lifting hooks are arranged at the bottoms of the two sides of the lifting frame in an array mode. Through the arrangement of the first gasket, the first sleeve and the second gasket, after the lifting hook is installed on the lifting beam, the first sleeve can separate the inner wall of the first through hole from the lifting hook, the first gasket can separate the lower side wall of the lifting beam from a first nut on the lifting hook, and the second gasket can separate the upper side wall of the lifting beam from a second nut on the lifting hook, so that the lifting hook is convenient to disassemble and assemble. The metal part between the lifting beam and the lifting hook is not in direct contact, the first gasket, the first sleeve and the second gasket which are made of nylon materials effectively block current circulation, current loss is avoided, and safety of operators and normal operation of equipment are effectively guaranteed.

The invention discloses an ultrasonic electrodeposition coupling system and method for improving zinc electrodeposition quality, and belongs to the technical field of hydrometallurgy, the system comprises an ultrasonic electrodeposition cell, an ultrasonic generation system, a solution circulation system and a heating temperature control system; a plurality of cathode plates and anode plates are alternately arranged in the ultrasonic electrodeposition cell at intervals; the ultrasonic generation system comprises an ultrasonic generator, and the ultrasonic generator is electrically connected with the ultrasonic probe and the ultrasonic vibrator through cables; the solution circulating system comprises a solution circulating tank, a peristaltic pump, a liquid inlet pipe and a liquid discharge pipe, and the peristaltic pump conveys an electrodeposition liquid in the solution circulating tank into the ultrasonic electrodeposition tank through the liquid inlet pipe for an electrodeposition reaction; the heating temperature control system comprises a heating resistor, a thermocouple, a heating resistor power supply electrically connected with the heating resistor, and a rectification power supply electrically connected with the electrode system. Through the synergistic effect of the composite additive and the ultrasonic technology, the negative influence of impurities on zinc deposition is effectively inhibited, and the current efficiency and the zinc product quality are remarkably improved.

The application discloses a method and system for determining the content of calcium and magnesium in a zinc solution electrolyzed by a chlorine-ammonia method, and the method comprises the following steps: in a solution with PH equal to 10, taking sodium potassium tartrate and triethanolamine as masking agents, taking acid chrome blue K-naphthol green B as an indicator, titrating with EDTA until the solution is pure blue, and determining the total content of calcium and magnesium; in a strong alkaline solution with PH equal to or greater than 12, taking triethanolamine as a masking agent, taking a calcium indicator as an indicator, titrating with EDTA until the solution is pure blue, and determining the content of calcium. The method can accurately determine the content of calcium and magnesium in the zinc solution electrolyzed by the chlorine-ammonia method, is used for guiding the formula of a production raw material, and can timely remove calcium and magnesium in the solution, so that the production is not seriously affected.

The present invention relates to a cathode plate for electrolytic zinc, belonging to the technical field of zinc electrowinning. The cathode plate for electrolytic zinc of the present invention comprises a conductive beam and an aluminum cathode plate fixedly arranged at the lower end of the conductive beam, wherein a titanium-based / amorphous metal oxide layer is in-situ coated above the liquid level line of the aluminum cathode plate, and a titanium-based / composite ceramic layer is in-situ coated along the vertical direction on both sides of the aluminum cathode plate, the conductive beam comprises a conductive aluminum beam and an aluminum-clad copper composite conductive head fixedly arranged at both ends of the conductive aluminum beam; the amorphous metal oxide layer is Ta-Zr-CaO x The oxide layer comprises a titanium-based / composite ceramic layer composed of a porous nano-TiO2 intermediate layer and a nano-ZrO2-SiO2-Al2O3-B4C composite outer layer. Compared to conventional 1070 aluminum cathode plates, the cathode plate for electrolytic zinc of the present invention has a cathode lifespan that is doubled in electrolytic zinc solutions containing high levels of chlorine and fluoride ions, without changing the electrolytic cell structure. The aluminum cathode plate has a low interface corrosion rate at the liquid level, eliminates the need for side strips, reduces cell voltage by over 10%, and improves current efficiency by over 2%.

The cathode plate comprises a conductive beam, an aluminum plate and two titanium plates, the lower end of the conductive beam is fixedly connected with the upper end of the aluminum plate, the upper portion of the side wall of the aluminum plate is connected with the two titanium plates through a plurality of screws, the top of the conductive beam is fixedly connected with two lifting lugs, one end of the conductive beam is fixedly connected with a conductive head, and the other end of the conductive beam is fixedly connected with the aluminum plate. The end, away from the conductive head, of the conductive beam is sleeved with an insulation sleeve. The cathode plate is easy and convenient to manufacture, the titanium plate can be repeatedly used and can also be directly applied to an existing cathode plate made of a pure aluminum material, and the problems that the cathode plate made of the pure titanium material is high in cost, poor in electric conductivity and firm in adhesion of separated zinc are solved. The two titanium plates are located above and below the liquid level line of the aluminum plate, the corrosion resistance and the knocking resistance of the cathode plate are improved through the liquid level upper part, zinc is conveniently separated out to be opened in the titanium plates through the liquid level lower part, the labor intensity of workers is reduced, mechanical zinc stripping is facilitated, the service life of the cathode plate can be prolonged, the production cost is saved, and the economic benefits are improved.

The application discloses a silent precise pre-stripping device for electrolytic zinc and electrolytic copper and relates to the technical field of metallurgy. The device comprises a rack, a pre-stripping device and an electrode plate. The pre-stripping device is arranged on the rack and comprises a guide plate, an inner swing arm, a cutter head and a driving device. A guide groove is arranged on the sidewall of the guide plate. A connecting shaft is arranged on the inner swing arm and is matched with the guide groove. The inner swing arm is arranged on the guide plate through the matching of the connecting shaft and the guide groove. The cutter head is arranged on the lower end of the inner swing arm and faces the electrode plate. The driving device is connected with the inner swing arm and can drive the inner swing arm to move along the guide groove. The cutter head can move along with the inner swing arm and tightly contact the surface of the electrode plate to strip the edges of the zinc sheet or the copper sheet on the surface of the electrode plate. The device has the beneficial effect that the edges of the zinc sheet or the copper sheet on the surface of the electrode plate can be stripped, and the edges of the zinc sheet or the copper sheet are convenient for the subsequent mechanical hand to grasp.

The utility model discloses cathode plate polishing and glue spraying equipment, belongs to the technical field of cathode plate processing for wet electrolytic zinc, and solves the problems of low precision of polishing the surface of a cathode aluminum plate, poor uniformity of a glue brushing surface, low processing efficiency and high labor intensity in the conventional manual operation mode. Comprising a polishing and glue spraying rack on which an aluminum plate placing frame is arranged, an aluminum plate end jacking mechanism is arranged on the front side of the aluminum plate placing frame, and aluminum plate centering mechanisms are arranged on the left side and the right side of the aluminum plate placing frame; an aluminum plate containing frame is arranged on the base, an aluminum plate pressing mechanism is arranged above the aluminum plate containing frame, a polishing and glue spraying Y-direction moving cross beam is arranged above the aluminum plate pressing mechanism, a polishing and glue spraying X-direction moving base is arranged on the polishing and glue spraying Y-direction moving cross beam, and a polishing and glue spraying device is arranged on the polishing and glue spraying X-direction moving base. The device is reasonable in design, compact in structure, low in labor intensity, high in machining efficiency and high in practicability, can improve the grinding precision and ensure the uniformity of a gluing surface, saves cost, and is beneficial to construction of an automatic production line of products.

The utility model discloses a double -position electrolytic zinc production device relates to electrolytic zinc production and processing field, and its technical key points are: including operation platform, be provided with two parallel feeding assembly and unloading assembly on the operation platform, the left side of feeding assembly is equipped with the discharging device, is equipped with the carrying manipulator between the discharging device and unloading assembly, is equipped with the variable -pitch subassembly between the discharging device and feeding assembly, the utility model further promotes the production efficiency of device.

The application belongs to the technical field of electrolytic zinc production equipment, and particularly relates to an electrolytic zinc stripping device and method. In the prior art, two surfaces cannot be stripped at one time, and the stripped zinc sheet is in a fragmentary shape. The present application provides the following scheme, which comprises a workbench, the top of the workbench is fixedly connected with a top plate through a supporting plate, a rectangular through hole is arranged in the workbench, a supporting plate is slidably arranged in the rectangular through hole, and the bottom of the workbench is fixedly connected with a placing rack. In the application, while the zinc sheet on the top and bottom of the cathode plate is stripped by the stripping blade, the guide block cooperates with the guide rod, the supporting plate cooperates with the wedge-shaped block, the knocking ball and the knocking block knock the top and bottom metal pins of the cathode plate, the zinc sheet cathode plate is loosened, the first high-pressure spray gun and the second high-pressure spray gun generate high-pressure water flow on the cathode plate, a gap is generated between the zinc sheet and the cathode plate, and the stripping blade can strip the zinc sheet from the cathode plate along the gap in the later stage.

The utility model provides an electrolytic bath diverter hoisting tool which comprises two hoisting beams, one ends of the two hoisting beams are hinged, the ends of the hoisting beams are provided with hoisting lugs, and hoisting rings are arranged on the hoisting beams on the back surfaces of the hoisting lugs; an opening and closing angle limiting device is arranged between the hoisting beams and is used for controlling the opening and closing angles of the hoisting beams, so that the stability of the hoisting process is ensured. The lifting device is simple in structure, safe, stable, uniform in stress, capable of effectively improving lifting safety, accuracy and adaptability of the shunt and reducing construction risks, and suitable for installation and maintenance of the shunt in the industries of electrolytic aluminum, electrolytic copper, electrolytic zinc and the like.

The invention discloses a method for determining an organic additive in an ammonia chloride method electrolytic zinc solution, and relates to the technical field of ammonia chloride method electrolytic zinc solution determination, and the method comprises the following steps: preparing an organic additive standard solution A with a concentration of a; the method comprises the following steps: diluting a to-be-detected sample of an ammonia chloride process electrolytic zinc solution with water to n times of volume to obtain a diluted sample; respectively measuring the permanganate indexes of the standard solution A and the diluted sample by adopting a potassium permanganate oxidation-sodium oxalate reduction titration method; calculating a conversion coefficient; and calculating the concentration of the organic additive in the to-be-detected sample according to a formula. According to the method, the unknown additive can be measured, and the measurement precision and reliability are improved, so that accurate data support is provided for the production process.

This invention discloses a method for preparing a low-silver-doped lead-silver alloy anode material. The method includes first smelting a lead-silver master alloy, adding melted silver to molten lead, and using electromagnetic and mechanical stirring to ensure uniform alloy composition. During casting and solidification, ultrasonic external field strengthening technology is employed to produce the lead-silver master alloy. Then, the lead-silver master alloy and rare earth modifier are added to the molten lead, along with a dispersant and antioxidant. The metal smelting temperature is controlled between 380℃ and 520℃, and the smelting time is 0.5 h. Electromagnetic and mechanical stirring techniques are used to ensure uniform alloy composition distribution. After casting and solidification, a blank for producing lead-silver alloy anode plates is finally obtained. This method is applied to the production of anode plates for zinc electrowinning.

The invention discloses a method for repairing an oxide film on the surface of an aluminum cathode plate and improving unsmooth stripping of cathode zinc, which comprises the following steps: cleaning the surface of the aluminum cathode plate with unsmooth stripping of cathode zinc, and polishing and brushing the plate by a steel wire roller plate brushing machine; spraying and washing the two surfaces of the polar plate for 1-2 minutes by using an aqueous solution containing hydrogen peroxide with the volume percent of 20-30% or potassium permanganate with the mass percent of 10-20 g / L; taking out the polar plate, placing the polar plate on a polar plate rack, and aging for more than 10 hours under the conditions of normal temperature and normal pressure, or blowing with oxygen-enriched air for about 0.5-1 hour, so as to obtain a surface oxide film with the thickness of about 5 microns; and then the spring is used for electrolytic zinc production, so that the problem of cathode zinc stripping incapability is solved.

The invention relates to the technical field of electrolytic zinc production and industrial cooling, and discloses a device for rapidly and conveniently cleaning a high-temperature solution before electrolysis of electrolytic zinc and efficiently dissipating heat and cooling the high-temperature solution before electrolysis of the electrolytic zinc, the device comprises a tower body, a spraying device, an air blowing system and a composite internal part, and the bottom of the tower body is fixedly installed on the ground through a ground anchor; the height of the tower body is two meters higher than that of a traditional cooling tower. The height of the tower body is increased by two meters compared with that of a traditional cooling tower, and the gas-liquid contact space is increased; the spraying device adopts a fine hole spray head integrated design, a high-temperature solution before electrolysis is atomized into tiny liquid drops, the tiny liquid drops are in countercurrent full contact with cold air blown by an air blowing system (the air volume is 4.0 * 10 < 4 > m < 3 > / h and the air pressure is 242Pa), the liquid before 65-DEG C high-temperature electrolysis can be cooled to 35 DEG C in a short time, the cooling water volume reaches 26m < 3 > / h, and the continuous treatment requirement of annual production of 15,000 tons of electrolytic zinc is met; the air blowing system and the spraying device are in linkage operation, the air volume is accurately matched with the spraying volume, the heat dissipation efficiency is improved by 40% compared with a traditional device, and the cooling time is greatly shortened.

The invention discloses an automatic control system and method for efficient cobalt removal in zinc hydrometallurgy, and belongs to the technical field of hydrometallurgy. The system comprises an embedded online detection module, a process decision server and a distributed execution mechanism group, and the embedded online detection module is deployed on an outlet pipeline of a purification reaction tank and comprises a multispectral analysis unit and an electrochemical sensing unit; the process decision server receives the detection data flow through the industrial Ethernet, and operates a dynamic optimization model based on machine learning; the distributed execution mechanism set comprises a zinc powder constant feeder, a solution circulating pump and a temperature adjusting device and is connected with the DCS through an OPC protocol. According to the method, the zinc powder consumption can be remarkably reduced, the electrolytic zinc quality is improved, and the method is suitable for full-process automatic accurate removal of cobalt in a large-scale zinc hydrometallurgy production scene.

The present invention discloses a device for recycling and processing used cathode plates in zinc electrolysis. The device comprises a base and a conveyor. The conveyor is mounted on both sides of the base, and the conveyor further comprises a left conveyor belt and a right conveyor belt. The base is also provided with a cutting device, a cleaning device, a shaping device, and a slot milling device. The device can cut and remove corroded portions of the used cathode plates using a semi-automatic work platform, and then re-slot the conductive crossbeam after cleaning, and finally weld the two together. This device integrates the five processes of shearing, cleaning, shaping, slot milling, and welding the used cathode plates onto a single work platform, enabling convenient and rapid recycling of the used cathode plates, reducing the labor required in subsequent electrolysis processes, and shortening the processing time of the used cathode plates.

The invention discloses a method for determining chloride ions in an ammonia chloride process electrolytic zinc solution, and relates to the technical field of determination methods, and the method comprises the following steps: preparing a subacid sample solution; adding a quantitative silver nitrate standard solution; heating to a slight boiling state for 1-2 minutes, and cooling to room temperature; adding an indicator; titrating excessive silver nitrate with the ammonium thiocyanate standard solution, determining a titration end point according to the change of the indicator, and recording the consumption volume of the ammonium thiocyanate standard solution; carrying out a blank experiment, and recording the consumption volume of the ammonium thiocyanate standard solution; and calculating the concentration of chloride ions in the chlorine-containing solution according to a titration result. According to the method, a quantitative silver nitrate standard solution is added into a subacid sample solution, chloride ions become silver chloride precipitates, an indicator is added, and excessive silver nitrate is titrated with an ammonium thiocyanate standard solution, so that the concentration of the chloride ions in the electrolytic zinc solution can be accurately and quickly measured, the detection speed is increased, and the detection accuracy is improved. And errors caused in the dilution process of the spectrophotometric method are reduced.

The invention relates to a preparation method of a catalytic anode based on a porous tetragonal system lead dioxide coating, and belongs to the technical field of hydrometallurgy. The method comprises the following steps: by taking a lead-silver alloy matrix electrode as an anode and a stainless steel plate as a cathode, carrying out anode constant-current electrodeposition in a lead oxide alkaline electrolyte to obtain a lead-silver / orthorhombic system lead dioxide electrode; a lead-silver / orthorhombic system lead dioxide electrode is used as a working electrode, a stainless steel plate is used as a counter electrode, a mercury / mercurous sulfate electrode is used as a reference electrode, linear scanning electrodeposition is carried out in a methanesulfonic acid-methanesulfonic acid lead-acid system, and the porous tetragonal system lead dioxide coating catalytic anode material is obtained. The porous tetragonal lead dioxide coating catalytic anode material has excellent oxygen evolution electro-catalytic performance and stability, and can solve the bottleneck problems of high energy consumption per ton of zinc and high maintenance cost caused by overlarge oxygen evolution overpotential, short service life and the like of the traditional lead-silver anode catalytic material in the zinc electrodeposition process in zinc hydrometallurgy.

This invention discloses a method for improving the electrochemical performance of lead alloy anodes using rare earth elements. The method includes first melting a rare earth alloy in a vacuum furnace, adding lanthanum (La), cerium (Ce), and neodymium (Nd) while using electromagnetic stirring, controlling the temperature at 850℃~1030℃ for 0.5-1 h. Next, the rare earth alloy concentration is diluted ≤10 times, and dispersants and antioxidants are added. Mechanical stirring combined with electromagnetic stirring is used to ensure uniform elemental composition, controlling the temperature at 500℃~550℃ for 0.5 h to prepare a rare earth master alloy. Then, 5% of the rare earth master alloy, 1% of a lead-calcium alloy, and 1% of a lead-strontium alloy are sequentially added to the molten lead, along with an antioxidant. Mechanical stirring combined with electromagnetic stirring is used to ensure uniform microstructure and composition, controlling the temperature at 450℃~500℃ for 0.5 h to finally obtain a rare earth lead alloy. This method can be applied to the production of anode plates for zinc electrowinning.

The application discloses a high-purity zinc powder preparation process and relates to the technical field of metal powder preparation. The high-purity zinc powder preparation process comprises the following steps: S1, raw material pretreatment: selecting industrial electrolytic zinc ingots with a purity of greater than or equal to 99.95%, crushing the zinc ingots into zinc particles with a size of 10-50 mm, removing the surface oxide scale and oil stains, removing ferromagnetic impurities through magnetic separation, and obtaining pretreated zinc raw materials. When the high-purity zinc vapor is condensed, multiple condensation modules are arranged, the rotating column and the condensation modules are driven to rotate by a driving mechanism, and the rotating column and the condensation modules are rotated in turn. In this way, the zinc vapor in the multiple condensation modules can be sequentially condensed and powdered, the powder can be discharged during the rotating and replacing process, continuous condensation and powdering operation can be realized without interrupting the production process, the quality of the powder can be prevented from being affected when a large amount of steam is introduced at one time, the condensation efficiency and quality can be improved, and the preparation efficiency and quality of the high-purity zinc powder can be improved.

The invention discloses a high-pulse zinc-silver reserve battery, belonging to the technical field of zinc-silver reserve batteries. The battery comprises a gas generator, a liquid reservoir, a positive plate, a negative plate, and a separator. The invention is characterized in that: the positive plate is prepared by firstly pressing silver powder with a high specific surface area onto a silver wire skeleton by a rolling process, the thickness of the positive plate being 0.21 mm to 0.24 mm, then performing formation charging by a rich liquid single formation process, the charging capacity being 120% to 130% of the theoretical capacity of the plate, and finally performing a post-formation pre-discharge treatment, the pre-discharge capacity being 20% ​​to 30% of the theoretical capacity; the negative plate is prepared by firstly pressing electrolytic zinc powder with a high specific surface area onto a silver wire skeleton, and performing formation by a single formation process, the thickness of the negative plate after formation being 0.43 mm to 0.48 mm; the separator is a high-pulse zinc-silver reserve battery, the thickness of the negative plate after formation being 0.43 mm to 0.48 mm, the area resistance of the separator is not more than 0.10 Ω·cm 2 triacetyl cellulose membrane.

The invention discloses a carbon fiber loaded titanium-based positive electrode plate, a preparation method and a zinc electrodeposition method applying the carbon fiber loaded titanium-based positive electrode plate. The problem that energy consumption is high in the current zinc electrodeposition process is mainly solved. The device is characterized by comprising a substrate material which is made of a titanium plate or a titanium mesh or titanium alloy; pretreating a substrate material, and treating the substrate material in a high-temperature oxalic acid solution; preparing a catalytic active substance layer, wherein a catalytic active substance of the catalytic active substance layer is prepared from carbon fibers modified by one of monatomic iron, cobalt and nickel; the preparation method comprises the following steps: preparing slurry by taking a catalytic active substance as a main body, polyvinylidene fluoride as a binder and N-N-dimethylformamide as a solvent, mechanically smearing and covering the surface of a base material, and drying at high temperature. Feeding the electrolyte into an electrolytic bath, and separating a negative chamber from a positive chamber by a zinc ion selective transmission diaphragm; and adding a reaction auxiliary agent on the anode side for electrodeposition. The invention provides a carbon fiber loaded titanium-based positive electrode plate and a preparation method thereof. The carbon fiber loaded titanium-based positive electrode plate and the preparation method thereof have the main advantages that (1) the energy efficiency is improved and the energy consumption is reduced; (2) the catalytic activity and corrosion resistance of the anode are improved; and (3) the lead-zinc pollution is reduced, and the environment is protected.

This invention provides a corrosion simulation method for aluminum cathode plates used in zinc electrowinning, comprising: step S1, preparing a simulation electrolyte, wherein the concentration of H2SO4 in the simulation electrolyte is 180 g / L to 300 g / L, and Cl... ‑ The concentration is 400 mg / L~1000 mg / L; Step S2, using an aluminum cathode plate as the cathode, and with a current of 400 A / m 2 ~750A / m 2 The working current is subjected to constant current polarization treatment for 1 to 8 hours, after which the current is disconnected and the plate is left to stand. Step S3 is repeated 6 to 10 times from step S2 until the aluminum cathode plate fails. This invention is based on a high-acid, high-chlorine simulated electrolyte system and controls the cathode reaction kinetics through constant current polarization; and simulates zinc deposition-stripping conditions through periodic energization-open circuit cycles, thereby achieving the technical effect of rapid, repeatable, and multi-dimensional evaluation of the corrosion resistance and service life of aluminum cathode plates.

The invention relates to the technical field of optical testing, in particular to a spectral determination method, system and equipment for chemical industrial wastewater. The method comprises the following steps: acquiring a spectral curve of electrolytic zinc wastewater; according to the shape of the spectrum curve in the wave crest section, the metal performance degree is obtained, and then a metal wave crest section is screened out; obtaining the zinc interference degree of the metal wave crest section according to the distribution condition of the spectral intensity in the metal wave crest section and the distance between the metal wave crest section and the wave crest section corresponding to the zinc element; and correcting the metal performance degree of the metal wave crest section according to the zinc interference degree to obtain the corrected metal performance degree, thereby obtaining the real concentration of each metal component in the electrolytic zinc wastewater. According to the invention, the interference of the spectral signal corresponding to the zinc element in the electrolytic zinc wastewater on the spectral signals corresponding to other metal elements is effectively reduced by acquiring the performance degree of the corrected metal, so that the real concentration of each metal component is accurately acquired, and whether the electrolytic zinc wastewater reaches the discharge standard is accurately judged.

The invention discloses a thallium removal method for a zinc hydrometallurgy system, which comprises the following steps: 1) in a neutral leaching supernatant purification process, adding potassium permanganate and ferrous sulfate in a first purification stage of a liquid purification process, and reacting for 1-2 hours; 2) adding zinc powder into the solution, adding activated carbon, and reacting for 1-2 hours; 3) adding lead acetate, and reacting for 1-2 hours; and 4) carrying out solid-liquid separation through a plate filter press, and removing purified residues. A combined thallium removal mode is adopted, so that the thallium content of the purified solution is low, the requirement of electrolytic zinc can be met, and electrolytic'plate burning 'caused by thallium is avoided; according to the thallium removal method for the zinc hydrometallurgy system, additional reaction time does not need to be increased, the thallium removal method can be synchronously carried out with the original neutral leaching supernatant liquid purification process, the production period is not prolonged, additional equipment investment is not increased, the cost is low, and the effect is good.