33 results about "Electrochemical dissolution" patented technology

The invention discloses an electrolyte for an aqueous manganese-based battery. The electrolyte comprises an electrolyte, and the electrolyte comprises a manganese salt; the weak acid is used for regulating and controlling proton dynamic release of the positive electrode / electrolyte interface to realize on-demand supply of protons of the positive electrode / electrolyte interface; and a solvent, wherein the solvent is deionized water; the PH range of the electrolyte is 2.0-3.5, and the electrolyte can realize on-demand supply of protons of a positive electrode / electrolyte interface in the charging and discharging process of the aqueous manganese-based battery, and promotes efficient and reversible deposition and dissolution reaction of a positive active substance manganese dioxide. According to the invention, the proton on-demand supply electrolyte is constructed by utilizing dynamic dissociation equilibrium of weak acid, so that on-demand supply of protons in the MnO2 dissolving process is realized, complete electrochemical dissolution of MnO2 is promoted, and generation of'dead manganese 'is inhibited, so that the cycling stability of the battery and the utilization efficiency of active substances are remarkably improved. The invention also discloses an aqueous manganese-based battery for realizing on-demand supply of protons and application of the aqueous manganese-based battery in the field of secondary energy storage.

The invention discloses an electrolytic mechanical composite polishing device and method of a magnetic field auxiliary line driving type flexible electrode, and the device comprises an electrode main body, a permanent magnet guide ball head, a heat shrink tube, a power supply, a linear electromagnetic module group and a magnetic field control system, and the electrode main body and the permanent magnet guide ball head are both arranged on a conductive pipeline; the electrode main body comprises a metal conductive part, a flexible insulating layer and an abrasive particle layer, the metal conductive part comprises a first electrode plate, a second electrode plate and a conductive core tube, the conductive core tube is sleeved on the conductive pipeline, and the first electrode plate and the second electrode plate are respectively arranged at two ends of the conductive core tube. An internal magnetic tool is pulled in a non-contact mode through an external magnetic field, the device can conform to the geometrical shape of a complex shape follow-up flow channel, electrochemical dissolution and mechanical micro-grinding effects are intelligently coordinated, a magnetic field auxiliary driving mode can be effectively integrated to overcome the limitation of an existing flexible electrode, and the precise and efficient finishing problem of the complex flow channel is solved.

The invention discloses an ion channel protein near-atomic scale confinement dissolution electrochemical machining method based on a bionic confinement interface. The method is characterized in that a bionic phospholipid bilayer mask is spread on a workpiece anode to shield a non-processing area, ion channel protein is embedded into the bionic phospholipid bilayer mask to serve as an electrolyte channel, and when the bionic phospholipid bilayer mask is powered on, the anode dissolution reaction is strictly limited in the ion channel protein channel. Millivolt-level picosecond-nanosecond pulse voltage or current is adopted on the time scale so that anode metal atoms can be removed one by one, electrolytic products are discharged in the modes of electrolyte adjustment, microcosmic acting force, micro vibration and the like so as to ensure sustainable generation of electrochemical reaction, and therefore near-atomic-scale electrolytic machining is achieved. The electrochemical machining technology and the biological field are fused in an interdisciplinary mode, the near-atomic-scale electrochemical dissolution reaction space is constructed, the capacity of electrochemical machining for removing materials in an ion form is approached, and near-atomic-scale electrochemical machining is achieved.

The invention discloses an electrochemical synthesis method of an ultra-high-purity precious metal compound, which comprises the following steps: dissolving precious metal powder in a high-purity acid solution system by adopting an electrochemical dissolution process in a clean environment to form an ionic precious metal, selectively removing impurities through acid-resistant chelating resin, and carrying out reduced pressure distillation and concentration to obtain the ultra-high-purity precious metal compound. In the process, introduction of other impurity ions is avoided, the efficiency is high, and industrial batch production is easy. The purity of the obtained precious metal compound can reach 99.999% or above, and the obtained precious metal compound can be used as a raw material in the fields of chips, electrons, catalysts and the like.

The invention discloses a method for preparing a methanol catalyst by using recycled waste copper-based red mud oxygen carriers, and belongs to the technical field of waste oxygen carrier recycling and catalyst preparation. The method comprises the specific steps that the waste copper-based red mud oxygen carrier is subjected to a combined process of microwave fluidized bed roasting and ball-milling enhanced magnetic separation, focused ultrasound-assisted electrochemical dissolution and deposition, Joule thermal shock-assisted acid leaching and alkali precipitation, and cascade recovery of multiple metal resources is achieved; the problem of paid stockpiling or landfill treatment of the waste copper-based red mud oxygen carrier at present is solved, and the defects that when a pure wet method or a pure pyrogenic method is adopted for recycling, metal to be recycled and miscellaneous elements are mutually dissolved, the acid leaching efficiency of oxidation-state metal is low, and waste is caused due to the low utilization rate of part of elements are overcome. According to the method, appropriate metal of the waste copper-based red mud oxygen carrier is used as a raw material for replacing the synthesized copper-based methanol catalyst, the prominent effect that waste metal materials enter a production chain again for additive manufacturing is achieved, and remarkable economic benefits and environmental protection benefits are achieved.

This invention provides a method for recovering nickel from high-temperature alloys. The method includes the following steps: electrochemically dissolving the high-temperature alloy to obtain a nickel-containing electrolyte and anode mud; adjusting the pH of the nickel-containing electrolyte until impurity metal ions form a precipitate, separating the precipitate to obtain a purified solution; mixing the purified solution, a chloride-containing solution, and an extractant for extraction to separate a cobalt-supported organic phase and a nickel-containing raffinate; adjusting the pH of the nickel-containing raffinate until nickel ions are converted into nickel precipitate, and then reducing the nickel precipitate with hydrogen plasma to obtain metallic nickel powder. The recovery process provided by this invention achieves high purity nickel recovery from high-temperature alloys, significantly shortens the single-batch operation cycle, improves recovery efficiency, and can meet the needs of large-scale, high-load continuous production.

The application discloses a method for recycling noble metal by electrochemically dissolving semiconductor lining plate, and belongs to the technical field of noble metal recycling. The technical scheme points of the method are as follows: lining plate cleaning; taking the lining plate as an anode, taking a titanium plate as a cathode, taking a mixed acid solution containing chloride ions as an anode electrochemical dissolving solution, taking a hydrochloric acid solution as a cathode electrochemical dissolving solution, arranging a cation exchange membrane between the cathode and the anode, taking the current density as 5-40 A / m 2 , and taking the dissolving temperature as 30-60 DEG C; repeatedly electrochemically dissolving gold to obtain gold powder, monitoring the reduction potential to be greater than or equal to 720 mV; oxidizing the remaining divalent platinum ions in the anode electrochemical dissolving solution into tetravalent platinum ions, adding ammonium chloride to react to generate ammonium chloroplatinate precipitate; filtering, washing and reducing the ammonium chloroplatinate to obtain platinum powder. By controlling the electrochemical dissolving temperature and the current density, oxidation and dissolving reaction of gold and platinum gold plating layers on the surface of the semiconductor lining plate is caused, the lining plate base material is not damaged and can be used for the second time.

This invention relates to a gap control device, method, and application for near-atomic-scale electrochemical machining of ion channel proteins, belonging to the field of electrochemical machining technology. To address the problems of insufficient gap control precision and difficulty in achieving near-atomic-scale localized dissolution and real-time observation in existing micro / nano electrochemical machining, this invention provides a dedicated device and method. The device constructs a precisely controllable nano / sub-nanometer-scale dielectric cavity layer deposited on the surface of the workpiece anode in a TEM window, and seals it with a tool cathode containing micro-perforations to form a closed cavity capable of storing liquid. The method includes: sequentially injecting a phospholipid-containing organic solvent and an electrolyte containing ion channel proteins into the cavity; utilizing the phospholipid's self-assembly at the interface to form a biomimetic confinement layer, allowing the electrolyte to contact the workpiece anode only through the internal channels of the ion channel proteins; and applying an appropriate pulse voltage to achieve localized electrochemical dissolution of the workpiece anode within an ultrathin gap defined by the dielectric layer thickness.

The application discloses a preparation method and application of an inert metal tungsten anode for low-temperature electrolytic aluminum of ionic liquid, and relates to the technical field of electrolysis. The preparation method of the porous tungsten inert anode provided by the application comprises raw material proportioning, raw material mixing, vacuum sintering and electrode purification. The method combines a discharge plasma sintering process with an electrochemical dissolution process to prepare the porous tungsten anode with a pore diameter of 1-10 microns. The anode has excellent electrochemical stability and corrosion resistance, can effectively promote the desorption of anode chlorine gas bubbles in the electrolysis process, and can effectively reduce the voltage of the low-temperature electrolytic aluminum system of ionic liquid.

This invention discloses a method for preparing high-purity gallium oxide by acid electrolysis, comprising the following steps: (1) acid washing of crude gallium to obtain pretreated crude gallium; (2) placing the pretreated crude gallium obtained in step (1) as the anode into an electrolytic cell containing acidic electrolyte for electrochemical dissolution to obtain a gallium-containing solution; (3) replacing the gallium-containing solution obtained in step (2) with high-purity gallium to remove impurities, and then performing liquid-solid separation to obtain a gallium-containing purified solution; (4) neutralizing the gallium-containing purified solution obtained in step (3) with ammonia to precipitate gallium hydroxide to obtain gallium hydroxide precipitate; (5) drying and calcining the gallium hydroxide precipitate obtained in step (4) to obtain 6N high-purity gallium oxide. This invention can use 2N crude gallium as raw material and prepare high-purity gallium oxide by electrochemical dissolution under acidic electrolyte. The entire process has high production efficiency, few side reactions, low impurity ion content, and low production cost, making it suitable for large-scale industrial production.

The invention discloses a composite solid electrolyte, a battery cell, a single battery and electric equipment. The composite solid electrolyte is prepared by co-doping silver sulfide and sulfide electrolyte. In the charging process, silver ions in the composite solid electrolyte are subjected to electrochemical dissolution, and nanoscale lithium-loving silver seeds are formed along the grain boundary and pores capable of conducting electron transfer. These silver seeds are alloyed with the lithium, inducing uniform electroplating of the lithium therebelow and returning to the electrolyte layer upon lithium exfoliation to improve reversibility during cycling.

The application discloses a device for measuring metal electrochemical dissolution current efficiency, which comprises a reactor, a sample groove is formed on the upper surface of the reactor, liquid inlet holes and liquid outlet holes are respectively formed on the left and right sides of the reactor, the sample groove is communicated with the liquid inlet holes and the liquid outlet holes through liquid inlet auxiliary flow channels and liquid outlet auxiliary flow channels and forms a U-shaped channel, the liquid inlet holes and the liquid outlet holes are respectively connected with liquid inlet pipes and liquid outlet pipes, an anode hole which is communicated with the sample groove is formed on the front side of the reactor, an anode connecting post is arranged in the anode hole, a cover plate is arranged on the upper part of the reactor, a cathode hole which is corresponded to the sample groove is formed on the cover plate, and a cathode material is penetrated into the cathode hole. The device is compact in structure by arranging the reactor and designing the U-shaped channel in the reactor, a sealing ring is conveniently installed, the sealing effect of the reactor is enhanced, electrolyte leakage is avoided to cause corrosion to the equipment, and a process environment of electrolytic processing is simulated, so that the current efficiency test is realized quickly and with saved materials.

The present application relates to the technical field of white alloy, and in particular to a white alloy processing method.The white alloy processing method comprises the following steps: (a) dividing the white alloy to be processed into n portions, n >= 3; taking the first portion of the white alloy to prepare a first anode; (b) placing the first anode in an electrolyte to perform electrolysis; when a large number of bubbles appear in the region of the first anode, the first anode is taken out and soaked in a fluorine-containing acid solution for treatment, and then placed in the electrolyte again to repeat the electrolysis operation to obtain a first defective anode; (c) mixing the first defective anode with the second portion of the white alloy to prepare a second anode, repeating the operation of step (b) to obtain a second defective anode, and so on until the nth portion of the white alloy is prepared into an nth anode and electrolysis is completed.The present application uses a mixed method mainly based on electrochemical dissolution and assisted by acid dissolution to process the white alloy, and has the advantages of less equipment, simple and convenient process, low production cost and high efficiency.

The invention discloses a plasma electrolytic machining method and equipment, and relates to the technical field of electrolytic machining, and the plasma electrolytic machining method comprises the following steps: providing a wire material, enabling the wire material to penetrate through a protection tube and be immersed in electrolyte, and arranging a negative plate in the electrolyte; applying voltage between the wire and the cathode plate to generate a gas film on the surface of the wire, and exciting plasma discharge in the gas film; the electrochemical dissolution of the wire is promoted through plasma discharge, so that the material is removed; the wire is electrically shielded through the protection tube, so that only the area, exposed in the electrolyte, of the wire is processed; and the feeding rate of the wire is controlled so as to adjust the partial discharge residence time, and machining of the target wire diameter or contour is achieved. According to the invention, the processing efficiency and precision of wires can be improved.

The invention discloses an in-situ chemical remediation method for organic contaminated soil coupled with electrocatalytic oxidation, and relates to the technical field of soil remediation. A coupling path of surfactant prewashing, in-situ pore-forming mass transfer enhancement and iron anode electro-Fenton continuous generation of active species is adopted in sequence; high-viscosity oil stains are emulsified and dispersed in soil pores and are deeply oxidized and degraded by hydroxyl ions, the concentration and pH of oxidizing substances in a reaction area are kept stable through circulating pumping and injection of a liquid injection pipe and a liquid pumping pipe, and long-acting, uniform and low-energy-consumption in-situ chemical remediation of the heavy oil stain soil is achieved; the electrocatalytic oxidation is carried out through electrochemical dissolution of anode iron alloy, and deep oxidation is carried out on refractory organic matters remained after chemical treatment; and the liquid injection pipe and the liquid extraction pipe accurately control liquid injection and liquid extraction, so that dynamic update of the electrolyte is maintained, oxidizing substances are ensured to be in continuous contact with target pollutants, intermediate products are removed and degraded in time, and reaction inhibition is avoided.

The invention discloses a method for separating and recovering valuable metals from yellow slag, which comprises the following steps: preparing the yellow slag containing iron-arsenic-copper alloy into an anode, and performing electrochemical dissolution by using the anode to obtain anode slime and enriched iron electrolyte; sequentially sulfating, roasting and leaching the anode slime to obtain a leaching solution and leaching residues, and separating and recycling valuable metals in the leaching solution and the leaching residues through post-treatment; the mass of sulfuric acid used for sulfating is 35-60% of the mass of the anode mud. The invention provides a method for effectively separating valuable metals such as iron, copper, germanium and the like aiming at the problem that the yellow slag of the iron-arsenic-containing copper alloy is difficult to treat, the content of iron in the material can be effectively reduced through sulfating and roasting, the consumption of heavy acid in the subsequent treatment process is reduced, meanwhile, the risk of generating arsine by direct acid leaching is avoided, and the method is safer, more environmentally friendly and higher in economic benefit. And the separation effect of each valuable metal is good.

This invention relates to the field of precision machining technology for metal materials, and provides a grinding method and apparatus for titanium-nickel alloys. The method includes: pre-treating a titanium-nickel alloy workpiece; placing the pre-treated titanium-nickel alloy workpiece in a rotary machining cavity, the rotary machining cavity rotating around a central axis, causing the titanium-nickel alloy workpiece to rotate and adhere to the inner wall of the cavity, forming a self-stabilized fixed state without mechanical clamping; introducing a first abrasive medium, a second abrasive medium, and a third abrasive medium into the rotary machining cavity in three stages; while the rotary machining cavity remains rotating, adding an electrolyte and applying electricity to the rotary machining cavity, causing the titanium-nickel alloy workpiece to undergo electrochemical dissolution, thereby forming an electrochemical-mechanical synergistic machining state. This solution can establish a synergistic relationship between material microstructure stability control and surface leveling efficiency, achieving highly consistent surface quality control while avoiding processing-induced phase transformation.

The application discloses a method for recovering platinum from platinum / alumina waste catalyst and a platinum leaching system. The method for recovering platinum from platinum / alumina waste catalyst comprises the following steps: performing first-stage calcination on a Pt / gamma-Al2O3 waste catalyst to remove organic matters and accumulated carbon; performing second-stage calcination on the treated waste catalyst to transform the gamma-Al2O3 into alpha-Al2O3; using a solution composed of NaCl, NaHSO4, H2O2 and water as a leaching system to leach the treated waste catalyst, filtering the leaching solution to obtain a first platinum-containing solution; performing a reduction reaction on the first platinum-containing solution under ultrasonic conditions to obtain crude platinum; performing direct current electrochemical dissolution on the crude platinum to obtain a second platinum-containing solution; removing impurities from the second platinum-containing solution to obtain an ammonium chloroplatinate precipitate; and reducing the ammonium chloroplatinate precipitate to obtain sponge platinum. The platinum leaching method provided by the application has a short process cycle, low recovery cost and high metal recovery rate.

The application discloses a low-platinum self-supporting electrode and an electrochemical preparation method and application thereof; a tungsten sheet and a platinum sheet are connected in parallel as an anode, a nickel sheet is used as a cathode, a one-step electrochemical reaction of anodic oxidation coupling electrodeposition is carried out in an acid electrolyte by utilizing the synergistic effect of metal electrode chemical dissolution, anodic metal electrochemical dissolution and cathodic electrodeposition, a platinum-nickel-based oxide-tungsten oxide composite self-supporting electrode is obtained at the cathode, the nickel-based oxide composition comprises nickel oxide, nickel hydroxide and hydroxyl nickel oxide, the loading amount of platinum is 0.01-0.05 mg·cm ‑2 ; the electrode composition and microstructure are regulated by controlling the reaction voltage, reaction temperature, electrolyte concentration and reaction time; the application realizes the construction of a low-platinum catalyst with high activity and high stability in a simple electrochemical process at low cost and high efficiency, and is expected to be expanded to the preparation of other noble metal and valve metal composite catalysts.

The invention relates to a method for rapidly dissolving a high-temperature alloy, synchronously and efficiently separating hafnium and recovering nickel and cobalt by using an electrolytic method, in particular to a method for promoting electrochemical dissolution of the high-temperature alloy, and a method for recovering nickel and cobalt products and hafnium-containing enrichment by controlling an ion competitive reduction sequence according to reduction potential differences of different metals. The invention provides a method for rapidly dissolving high-temperature alloy waste to recover nickel and cobalt resources and synchronously and efficiently separating hafnium-containing enriched substances, and mainly aims at solving the problems that valuable metal resources are difficult to recover due to the fact that high-temperature alloy is difficult to dissolve in an acid solution, and the process for treating the high-temperature alloy waste is complex and causes secondary pollution to the environment. According to the method, a traditional long-process recovery method is broken through, a unique alkaline region of a cathode / solution interface in the acid solution is regulated and controlled by utilizing metal reduction potential difference, the nickel-cobalt product is generated, meanwhile, the hafnium-containing enrichment is recovered, and the process flow is shortened. The method comprises the following steps: 1, respectively taking a high-temperature alloy and a titanium sheet as an anode and a cathode of electrolysis equipment, adjusting the pH value of an electrolyte to a certain value, turning on a direct-current power supply, and regulating and controlling electrolysis parameters to carry out electrochemical dissolution; 2, performing solid-liquid separation on a product in the electrolytic bath, and filtering to obtain a hafnium-containing enriched product; 3, separating the cathode product from the cathode to obtain a nickel-cobalt product; and 4, washing the hafnium-containing enriched product and a cathode nickel-cobalt product.

The invention belongs to the technical field of catalysts, and particularly relates to a mesoporous palladium-silver alloy electrocatalyst for efficiently synthesizing cyclohexanone-oxime as well as a preparation method and application of the mesoporous palladium-silver alloy electrocatalyst. The preparation method is characterized by comprising the following steps: dissolving dioctadecyl dimethyl ammonium chloride in a mixed solution of deionized water and ethanol, sequentially adding a sodium hydroxide solution, a metal precursor chloropalladic acid, a silver nitrate solution and the like, and washing and drying to obtain the catalyst. The one-step soft template co-reduction method is adopted for preparation, the obtained catalyst has high electronic conductivity so as to ensure efficient charge transfer, the carrier-free design avoids active component falling or carrier corrosion instability, the palladium-silver alloy phase component enhances the electrochemical dissolution resistance, and the defects that an existing electrocatalyst is low in Faraday efficiency and low in cost are overcome. The yield is low, and the like.

The invention relates to an electrolytic machining device and method for a long and thin deep groove, and aims to solve the problems of low precision of the deep groove, serious stray corrosion and difficulty in discharge of electrolytic products in the existing electrolytic machining, an eccentric cam vibration mechanism is arranged to drive a metal piston cathode to feed in a reciprocating manner, so that a machining gap is periodically changed; a pulsating electric field and an alternating flow field are formed, and electrolyte updating and electrolysis product discharging are enhanced; meanwhile, the insulating thin plate is tightly attached to the surface of the workpiece through the clamping mechanism, and stray corrosion of a non-machining area is effectively inhibited. The device is further integrated with an electrolyte circulating system, and efficient washing is achieved in cooperation with cathode vibration. Under the synergistic effect of a dynamically-regulated electric field and a flow field, high-precision and high-consistency slender deep groove machining of a workpiece is achieved through electrochemical dissolution, the machining stability and the surface quality are remarkably improved, and the method is suitable for manufacturing of complex structures of materials difficult to machine.

The application discloses a method and device for region-selective electrochemical machining based on ice layer constraint and laser induction, and relates to the field of special machining. A solid ice sealing layer is constructed on the surface of a machining sample by a refrigeration module, a transparent cathode head in an integrated cathode is heated by a laser irradiation module to make the ice layer in the machining area phase change and melt to form a micro channel; then under the action of a pulse electric field, electrolyte is transported to the machining area of the machining sample through the internal flow channel of the integrated cathode to trigger localized electrochemical machining. A machining device is designed to realize the machining method. Under cold conditions, the workpiece to be machined is first sealed by ice, and then laser irradiation and electrochemical dissolution are cooperatively coupled to enhance the energy density of the machining area, so that the ice sealing of the machining area surface is melted, the non-machining area is continuously ice-sealed, and the purpose of localized electrolytic machining without stray corrosion is achieved.

The invention relates to the technical field of a microrobot mediating an ion drug effect and local drug delivery of the microrobot in a gastrointestinal tract cavity, in particular to a food-grade microrobot. A food-grade micro-robot comprises a magnetic response framework, at least two pairs of solid copper electrodes in spatial distribution, a piezoelectric transducer, a driving circuit of the piezoelectric transducer, a biological adhesion pad and an external magnetic field response unit used for posture and track control. The magnetic response skeleton is used for realizing rolling navigation and posture adjustment in a gastrointestinal tract cavity; the piezoelectric transducer is configured to output an electric potential under external focused ultrasound excitation. According to the robot, long-distance rolling navigation is achieved through magnetic driving, reversible anchoring is achieved through a bionic spinule adhesion pad, focused ultrasound (FUS) is used as an energy inlet to drive an on-chip piezoelectric transducer to generate adjustable potential, a three-dimensional electric field is formed among multi-pole copper electrodes, electrochemical dissolution of solid copper and rapid transmission dominated by electromigration are triggered, and therefore the robot can be used for conducting electromigration on the solid copper. Therefore, the local pharmacokinetic performance is obviously improved.

The invention relates to a method for leaching valuable metal in high-value solid waste through ultrasonic-electric field cooperation, and belongs to the technical field of valuable solid waste treatment. The valuable metal solid waste is dried and ground to obtain valuable metal solid waste powder; and the valuable metal solid waste powder is added into the leaching agent solution to be mixed and mixed to obtain valuable metal solid waste slurry, the valuable metal solid waste slurry is placed in an electric field, an ultrasonic field is introduced for ultrasonic-electric field synergistic leaching for 20-160 min, and valuable metal leaching liquid and leaching residues are obtained through solid-liquid separation. According to the method, a passivation layer on the surface of a mineral is continuously removed by utilizing shock waves and micro jet generated by ultrasonic cavitation, a diffusion boundary layer of a solid-liquid interface is thoroughly disturbed, a nearly friction-free substance transfer channel is created for ion migration driven by an electric field, and high-speed transmission of ions is realized; an electric field destroys a mineral lattice structure from the inside through an electrochemical effect, a reaction energy barrier is effectively reduced to promote electrochemical dissolution, and ultrasonic waves promote interface updating and mass transfer strengthening to jointly promote great improvement of the leaching rate and efficiency.

This invention discloses an automated and chemical polishing method based on DC power supply control, relating to the field of metal surface treatment technology. The method includes: placing the workpiece to be polished as the anode in an electrolytic cell; applying preset electrical parameters through a DC power supply to trigger an electrochemical dissolution reaction; simultaneously or alternately performing mechanical or fluid-assisted polishing to remove reaction products; real-time monitoring of process parameters such as current density, electrolyte potential, temperature, or surface roughness and feeding them back to the control system; the system dynamically adjusting the power output parameters or polishing parameters based on the monitoring data and preset endpoint conditions, until the polishing endpoint is reached, at which point it automatically terminates. This invention achieves high efficiency, stability, and automation of the polishing process through the synergistic effect of electrochemical and mechanical polishing and intelligent closed-loop control, effectively improving polishing efficiency and surface quality consistency.

The invention discloses a preparation method of a high-purity iridium target material. The preparation method comprises the following steps: (1) electrochemical dissolution; (2) precipitating sodium hydroxide; (3) hydrogen thermal reduction; (4) vacuum hot pressing; and (5) machining. A high-purity iridium target is prepared by adopting a combined method of electrochemical dissolution, sodium hydroxide precipitation, hydrogen thermal reduction, vacuum hot pressing, machining and the like, crude iridium powder is subjected to electrochemical dissolution to obtain a chloroiridic acid solution, the chloroiridic acid solution is subjected to sodium hydroxide precipitation to obtain high-purity iridium oxide particles, the high-purity iridium oxide particles are dried, and hydrogen is introduced for reduction to prepare the high-purity iridium powder. The high-purity iridium powder is subjected to vacuum hot press molding to prepare a target blank, and the target blank is subjected to machining turning treatment to obtain the high-purity iridium target. The method is simple in technological process and easy to implement, the purity of the iridium target is larger than 99.999%, the grain size is 0.5-10 micrometers, and the density is gt; and the iridium sputtering target material can be used as a raw material for preparing an iridium film from the iridium sputtering target material.

The invention relates to the technical field of hydrometallurgy, and provides a method for preparing high-purity lead through bulk anode electrolytic refining. The method comprises the following steps: melting crude lead and / or high-impurity lead alloy, carrying out water quenching and ball splashing to obtain a bulk anode, putting the bulk anode into an anode frame, inserting a conductive rod into the anode frame to obtain a frame-type anode, and carrying out electrolytic deposition on the frame-type anode and a cathode in an electrolyte to obtain high-purity lead. The bulk anodes are adopted for electrolysis, so that the specific surface area of the anodes is greatly increased, and during electrolysis under the same current intensity, as the specific surface area is increased, the current density of the anodes is reduced, and the anode passivation phenomenon is less or even eliminated, electrolytic deposition is smoothly carried out, and impurities such as antimony and bismuth are separated from lead; the whole treatment process has the advantages of high metal direct recovery rate, no anode scrap, less antimony dissolution, low energy consumption, no anode scrap recasting step, short flow, simple equipment and the like, and is convenient for large-scale industrial production and application.

The invention discloses a method for recovering and preparing ammonium rhenate from rhenium alloy waste, and belongs to the technical field of clean recovery of resources. The method comprises the following steps: 1) carrying out surface oil removal and activation pretreatment on the rhenium alloy waste; (2) the pretreated rhenium alloy waste serves as an anode, a titanium-based ReO2-TiO2 composite coating electrode is adopted as a cathode, and electrochemical dissolution is conducted in an ammoniacal electrolyte; 3, the electrolyzed solution is filtered, then evaporation concentration and cooling crystallization are conducted, and ammonium rhenate is obtained.The method can be widely applied to rhenium-iron alloy waste materials of various sources and has the advantages of being short in technological process, low in energy consumption, high in efficiency, high in product purity, capable of achieving cyclic utilization of the electrolyte and the like.

The invention discloses a method for recovering precious metal by electrochemically dissolving a semiconductor lining plate, and belongs to the technical field of precious metal recovery, and the method is characterized by comprising the following steps: cleaning the lining plate; the lining plate is used as an anode, the titanium plate is used as a cathode, an electrochemical dissolving solution of the anode is an acidic mixed solution containing chloride ions, an electrochemical dissolving solution of the cathode is a hydrochloric acid solution, a cation exchange membrane is arranged between the cathode and the anode, the current density is 5-40A / m < 2 >, and the dissolving temperature is 30-60 DEG C; the electrochemical dissolution gold reduction is repeated to obtain gold powder, and the reduction potential is monitored to be larger than or equal to 720 mV; oxidizing bivalent platinum ions in the residual anode electrochemical dissolving solution into tetravalent platinum ions, and then adding ammonium chloride to react to generate ammonium chloroplatinate precipitate; and filtering and washing the ammonium chloroplatinate, and then carrying out reduction treatment to obtain platinum powder. By controlling the electrochemical dissolution temperature and the current density, the gold and platinum plating layers on the surface of the semiconductor lining plate are subjected to oxidation dissolution reaction, so that the substrate of the lining plate is not damaged and can be used for the second time.