841 results about "Aluminium electrolysis" patented technology

The invention provides a method and system for utilizing flue gas generated after petroleum coke calcination, and belongs to the field of aluminum electrolysis and aluminum carbon. The method comprises the following steps: collecting high-temperature flue gas discharged after calcining petroleum coke; the high-temperature flue gas is subjected to heat exchange treatment, and low-temperature flue gas with the set temperature is obtained; low-temperature flue gas is used as a heat source, the wet-based petroleum coke is heated and dried, and dry-based petroleum coke with a set water value is obtained; and calcining the dry-based petroleum coke, and circularly using flue gas collected by calcining for heating and drying the wet-based petroleum coke to form a closed cycle. High-temperature flue gas obtained after calcination is subjected to heat exchange to form low-temperature flue gas, the low-temperature flue gas is used for drying wet-based petroleum coke, a flue gas circulation system is formed, and multi-stage utilization of waste heat is achieved. Meanwhile, the dried petroleum coke can reduce energy consumption required by water evaporation during calcination, and erosion of water vapor to a hearth refractory material is avoided. Therefore, the negative influence of petroleum coke moisture on the heat efficiency is reduced while the waste heat utilization rate after petroleum coke calcination is improved.

The invention discloses a method for extracting lithium and sodium from overhaul slag through electrochemistry assistance, and belongs to the technical field of aluminum electrolysis lithium-containing solid waste cyclic economic utilization and environmental protection. A method for extracting lithium and sodium from overhaul slag through electrochemical assistance comprises the following steps that the overhaul slag and auxiliary materials are subjected to die-casting forming to prepare an electrode plate, and then lithium and sodium are extracted from the overhaul slag through an electrochemical method. According to the method, for the lithium-containing overhaul slag solid waste generated in the electrolytic aluminum industry, migration and dissolution of metal ions are enhanced through electrochemical assistance in a weak acid environment, so that comprehensive recycling of valuable elements of lithium and sodium is achieved, and meanwhile the recovery rate of lithium can be larger than 90%. In addition, the method can be carried out at low temperature, so that the energy consumption can be obviously reduced, and meanwhile, the equipment investment can be greatly reduced; meanwhile, solid waste resource utilization can be achieved, the risk of secondary pollution is reduced, and good economic and environmental benefits are achieved.

The invention discloses an electrolytic aluminum tank temperature prediction model construction method, system, equipment and medium based on federated learning, and belongs to the technical field of electrolytic aluminum tank temperature prediction.The method comprises the steps that production operation parameters are collected in multiple electrolytic aluminum factories respectively, and local sample data sets are constructed; a neural network model used for temperature prediction is constructed and trained locally, and before training, a whale optimization algorithm is adopted to search and determine training control parameters of the neural network model; the neural network model parameters are encrypted and uploaded to a central server; decrypting the uploaded encrypted neural network model parameters, and executing neural network model parameter aggregation to obtain global model parameters; issuing the aggregated global model parameters to a plurality of electrolytic aluminum factories to update a local neural network model; and repeating the operation until the neural network model converges. According to the method, the accuracy and practicability of temperature prediction of the aluminum electrolysis cell are remarkably improved on the premise that industrial data privacy is guaranteed.

The invention provides a device and a method for recovering valuable metals from slag of a copper furnace by reducing carbon slag in an aluminum electrolysis cell, and relates to the technical field of metal material recovery, the device comprises a smelting furnace, a mixing bin, an anti-blocking mechanism and a screening mechanism; the anti-blocking mechanism comprises a rotating ring rotationally connected to the bottom of the mixing bin, a gear disc is fixedly arranged at the bottom of the rotating ring, an arch breaking plate is fixedly arranged on the inner side of the gear disc and located on the inner side of the mixing bin, a mounting seat is fixedly arranged on the right side of the mixing bin, and a driving motor is arranged at the top of the mounting seat. According to the scheme, it is finally achieved that when a gear disc rotates, an adjusting support and a rotating wheel are driven to rotate at the same time, under the action of a protruding plate, a screening frame drives a screen to move up and down, and marbles irregularly jump in a lantern ring, so that discharged materials are screened, the roasted materials do not need to be screened independently, and the screening efficiency is improved. And the efficiency of recovering valuable metals from the copper-aluminum slag is improved.

A method for recovering a lithium from a spent cathode of aluminum electrolysis according to an embodiment of the disclosure includes: crushing the spent cathode, then washing and filtering the spent cathode to obtain a first filtrate and a first filter residue, respectively; evaporating and crystallizing the first filtrate to obtain a sodium fluoride product; adding a binder into the first filter residue, and mixing and shaping the first filter residue and the binder, and then calcining and collecting shaped first filter residue to obtain a graphite product and a dust collection powder; lithium-salt leaching the dust collection powder with pure water and filtering to obtain a second filtrate and a second filter residue; washing the second filter residue, and then drying the second filter residue to obtain a cryolite product; and adding the second filtrate into a carbonas solution to perform a lithium precipitation reaction to obtain a lithium carbonas product.

The invention discloses an aluminum electrolytic capacitor special for an electric tool and a preparation method of the aluminum electrolytic capacitor. The method comprises the following steps that a positive electrode guide pin and a negative electrode guide pin are riveted to an anode foil and a cathode foil respectively; placing electrolytic paper between the anode foil and the cathode foil, and winding to form a core package; carrying out baking drying and electrolyte impregnation treatment on the wound core package, and then carrying out packaging and aging; the electrolyte consists of the following components in percentage by mass: 45-60% of a solvent, 25-40% of a solute, 5-15% of an additive and 5-10% of a stabilizer, the solute contains 2-butyl suberic acid; the stabilizer contains alkyl phosphate. According to the preparation method of the aluminum electrolytic capacitor special for the electric tool, the electrolyte formula is optimized, oxidation hydrolysis of the electrode foil and the oxidation film is effectively inhibited, the ion migration resistance is reduced, the polarization phenomenon is reduced, the loss value and the equivalent series resistance (ESR) of the obtained capacitor are remarkably reduced, the ripple resistance is improved, and the aluminum electrolytic capacitor is suitable for the electric tool.

The invention provides an intelligent crust breaking and blanking system based on machine vision. The intelligent crust breaking and blanking system comprises an active detection module, an image acquisition module, an image processing and calculating module, a data communication module, a cell control machine, a high-temperature-resistant insulation structure and a cooling device, the active detection module forms a reference line in an aluminum electrolysis cell monitoring area; the image acquisition module is used for respectively acquiring image data of a motion state of a crust breaking hammer and a material falling process of a blanking port; the image processing and calculating module is used for carrying out preprocessing, feature extraction and calculation on the image to obtain a crust breaking depth parameter and blanking flow data; the data communication module transmits a processing result to the cell control machine, and the cell control machine adjusts the crust breaking set depth and optimizes the blanking interval according to the processing result; the high-temperature-resistant insulation structure carries out physical protection and electrical isolation on key modules, and the cooling device keeps the internal temperature stable and prevents the lens from being polluted. Therefore, the crust breaking depth and the blanking quantity control precision can be improved, the maintenance cost is reduced, and the adaptability to a high-temperature strong electric field environment is improved.

The invention discloses a complex lithium ore or lithium-containing waste pretreatment low-temperature transformation roasting lithium extraction method which comprises the following steps: uniformly mixing one or more of petalite concentrate, spodumene concentrate, lithium chinastone and lithium-containing glass waste with aluminum electrolysis overhaul slag, fluoride and concentrated sulfuric acid, and then carrying out low-temperature calcination pretreatment; pre-treated materials are obtained; carrying out transformation roasting on the pretreated material to obtain a transformed material; then, uniformly mixing the transformed material with concentrated sulfuric acid, and performing low-temperature acidification calcination to obtain an acidified material; and finally, placing the acidified material in water, carrying out water leaching, and carrying out solid-liquid separation to obtain a lithium leachate, according to the technical scheme, collaborative consumption of multiple lithium resources can be achieved, the comprehensive utilization rate of lithium is high, transformation roasting energy consumption is low, the process is simple, cost is low, the method is suitable for industrial application, the important significance is achieved for efficient development and utilization of natural hard rock type lithium ore and secondary lithium resources, and the application and popularization prospects are great.

The invention provides a method and equipment for leaching and recycling an aluminum electrolysis waste carbon cathode. The method relates to the field of solid waste treatment, and comprises the following steps: S1, crushing the recycled waste aluminum electrolysis waste carbon cathode by using a jaw crusher, further finely grinding to a certain mesh number by using a vibration mill, and drying for later use; s2, the ground waste carbon cathode is weighed, a certain amount of water is added, the mixture is placed in an ultrasonic instrument at the normal temperature to react for a period of time, and washing residues and washing liquid are obtained through filtering; s3, a sodium hydroxide solution with a certain concentration is added into the washing residues to be mixed, and the mixture is placed in an ultrasonic instrument to react for a period of time at a certain temperature. Compared with a traditional leaching method, the method has the advantages of being high in efficiency and good in effect, the leaching rate of valuable substances is greatly increased, and the valuable substances are recycled through a series of steps such as washing, alkaline leaching, acid leaching and recycling. The method realizes efficient recovery of useful components in the waste carbon cathode, does not produce solid waste and wastewater in the process, is environment-friendly, and realizes effective utilization of resources and harmless treatment of dangerous solid wastes.

The invention belongs to the technical field of electrolytic aluminum equipment, and particularly relates to a flexible aluminum electrolytic cell shell and an electrolytic cell. The inner side heat conduction plate is arranged on the inner side of the outer side strong protection plate, is in contact with the cell lining structure of the electrolytic cell, corresponds to the positions of the molten aluminum and the electrolyte, and forms a double-layer cell shell structure with the inner side heat conduction plate; the barrier plate is arranged between the inner side heat conduction plate and the outer side strong protection plate; the side heat exchanger is arranged in a space defined by the inner side heat conduction plate, the outer side strong protection plate and the blocking plate and makes contact with the inner side heat conduction plate. The insulating bricks are filled in the area between the outer side strong protection plate and the electrolytic cell; and the cathode system tank is arranged in the insulating brick below the barrier plate and penetrates through the outer side strong protection plate. The problems that an existing flexible aluminum electrolysis cell is high in side wall temperature and low in heat exchange efficiency are solved, and the potential safety hazard that when a heat exchange medium is liquid, leakage is likely to occur is solved.

The invention relates to a method for recovering lithium and fluorine from aluminum electrolysis hazardous waste, which comprises the following steps: firstly, mixing organic polyol and alkaline hydroxide according to a molar ratio of 1: (0.5-2) to obtain a eutectic solvent; heating the eutectic solvent to 80-150 DEG C, and adding a proper amount of raw material fine powder and calcium oxide for reaction leaching; carbonating and filtering the leachate to obtain lithium carbonate; washing the leaching residues with an acetic acid solution to obtain a calcium fluoride product; the concentration of fluorine ions in the leachate is smaller than or equal to 200 ppm, and the purity of calcium fluoride is larger than or equal to 90%; the leaching rate of lithium in the method is greater than 85%; the slag feeding rate of fluorine is greater than 95%; and no hydrogen fluoride gas is generated in the method. According to the method, a non-toxic and biodegradable eutectic solvent is adopted as a leaching agent, and efficient leaching of lithium and fluorine in the aluminum electrolysis dangerous waste materials is achieved; calcium oxide is used as a precipitating agent, free fluorine is promoted to be precipitated and recycled as calcium fluoride, the whole process meets the requirement of green metallurgy, and the win-win situation of resources and the environment is achieved.

The utility model relates to the technical field of quality inspection equipment, and discloses an aging sorting device of a bolt type aluminum electrolytic capacitor, which comprises a detection mechanism, a guide mechanism arranged at the upper end of the detection mechanism, the detection mechanism comprises a base, a detector fixedly mounted at the front end of the top wall of the base, and a plurality of aging detection circuits arranged in parallel are arranged in the detector. Each aging detection circuit is provided with a detection seat, and the plurality of detection seats are horizontally arranged at equal intervals. According to the utility model, the detector is arranged, a plurality of aging detection circuits connected in parallel are arranged in the detector, and each aging detection circuit is provided with a detection seat, so that bolt-type aluminum electrolytic capacitors can be installed on the plurality of detection seats and are controlled by the data processing host; and compared with sequential detection of a plurality of bolt-type aluminum electrolytic capacitors, the integrated aging detection device is more convenient to use and can be used for integrated aging detection of the plurality of bolt-type aluminum electrolytic capacitors.

The invention relates to the technical field of monitoring equipment, in particular to intelligent aging monitoring equipment for an aluminum electrolytic capacitor, which comprises a mounting back plate, a mounting groove is formed in the mounting back plate, a reciprocating screw rod is rotatably connected in the mounting groove, and a rotating motor for driving the reciprocating screw rod to rotate is further fixedly mounted on the inner side wall of the mounting groove. In conclusion, when the temperature of the working environment of the aluminum electrolytic capacitor rises, the monitoring equipment body can be driven to move and monitor and check the aluminum electrolytic capacitor through the rotating motor; on the other hand, the diameter of a first driving bevel gear and the diameter of a second driving bevel gear are larger than the diameter of a first driven bevel gear and the diameter of a second driven bevel gear respectively, the effect of accelerating a rotating rod is achieved, it is guaranteed that shooting of the monitoring equipment body is clear, the effect that the rotating rod drives heat dissipation fan blades to rotate for heat dissipation can be guaranteed, and use is convenient.

The invention provides a method for synergistically preparing calcium fluoride and a molecular sieve based on multi-element industrial waste, and belongs to the technical field of industrial waste recycling. The method comprises the following steps: respectively taking an electrolytic aluminum industry byproduct fluorine-containing waste electrolyte cryolite and lithium slag after lithium extraction of lithium ore as raw materials, performing acid leaching on the electrolyte cryolite, adding a calcium compound, separating to obtain calcium fluoride solid and a mixed solution containing aluminum chloride and sodium chloride, and adding an alkaline solution into the mixed solution to obtain an aluminum hydroxide product. And carrying out alkaline leaching on the lithium slag to obtain a mixed solution containing sodium silicate and sodium metaaluminate, and proportionally synthesizing the mixed solution with the obtained aluminum hydroxide and sodium hydroxide solution to obtain the 4A zeolite molecular sieve product. The calcium fluoride and the zeolite molecular sieve are cooperatively prepared by adopting multi-element industrial waste, and the problems that electrolyte cryolite cannot be completely applied to the aluminum electrolysis process, the lithium slag treatment cost is high and the like in the prior art are solved.

The invention belongs to the technical field of aluminum electrolysis waste recovery treatment, and particularly relates to a method for efficiently recovering aluminum electrolysis waste through an ion recombination technology. The method comprises the following steps: crushing the aluminum electrolysis waste, mixing with the aluminum-containing waste and sulfuric acid, roasting and modifying; mixing and stirring the modified waste and water, and filtering; carrying out impurity removal and concentration on the filtrate, and adding carbonate or phosphate to initiate a lithium precipitation reaction; mixing the filter residue and the filtrate precipitate with an alkaline solution, carrying out an alkaline leaching reaction to prepare a sodium metaaluminate mixed solution, and washing the filter residue with water to obtain a sodium fluoride solution; introducing carbon dioxide into the mixed solution or adjusting the pH value to 10-12 to obtain an aluminum hydroxide precipitate and a sodium carbonate solution; the sodium fluoride solution reacts with ammonia water to prepare an ammonium fluoride solution and sodium hydroxide, ammonium fluoride is used for preparing high-purity aluminum fluoride, and the sodium hydroxide solution is recycled. According to the method, valuable elements such as aluminum, lithium and fluorine in the aluminum electrolysis waste can be efficiently recycled, cyclic utilization of resources is promoted, and environmental pollution is effectively reduced.

The present invention discloses a shelling cylinder control method and system based on air pressure detection, which belongs to the field of aluminum electrolysis technology, including: obtaining a waveform diagram and a voltage change curve of the shelling cylinder during the whole shelling process; constructing a shelling cylinder digital model based on the waveform diagram and the voltage change curve; collecting the air pressure of the shelling cylinder in real time, generating control instructions according to the air pressure, voltage and the shelling cylinder digital model; and automatically controlling the shelling cylinder based on the control instructions. Compared with the traditional cylinder, the present invention can retract the hammer head in advance through time setting, reduce the soaking and loss of the hammer head, intelligently detect whether the hammer head has penetrated the shell surface and issue an alarm, and intelligently detect the jamming of the hammer head and issue an alarm, thereby improving production efficiency and product quality.

The invention discloses a low-energy-consumption management and control method for an aluminum electrolytic cell, and relates to the technical field of electrolytic cell energy consumption management. Establishing a four-dimensional cooperative control system of electrolyte temperature, molecular ratio, aluminum level and cell voltage, and setting two control gradients of a stability interval and an energy efficiency optimization interval; a hierarchical dynamic regulation and control mechanism is implemented, regulation and control are executed according to the priority sequence of the aluminum level, the molecular ratio and the cell voltage, and a temperature self-adaptive compensation algorithm is adopted for molecular ratio regulation and control. When specific conditions are met, a golden window period control mode is activated, and special strategies are adopted for molecular ratio compensation and cell voltage adjustment; an emergency regulation and control mechanism is arranged to cope with abnormal fluctuation of molecular ratio, an energy efficiency optimization evaluation system is established, and a three-dimensional equilibrium curved surface is generated in an optimal control state in which direct current power consumption is reduced to 12510kwh / t.Al or below and is kept for 24 hours. The method realizes accurate regulation and control of key parameters of the aluminum electrolysis cell, effectively reduces energy consumption, and improves production stability and energy efficiency level.

The utility model belongs to the technical field of aluminum electrolysis, and particularly relates to a cathode carbon block and steel bar assembling structure which comprises a full-graphite cathode carbon block and a steel bar, at least one steel bar groove is formed in the full-graphite cathode carbon block in a penetrating mode, a leveling layer is arranged on the bottom wall of the steel bar groove, and the steel bar groove is formed in the full-graphite cathode carbon block in a penetrating mode. Two steel bars are symmetrically arranged in the steel bar groove at a fixed interval, and the bottom ends of the steel bars are tightly attached to the leveling layer. A partition layer is arranged in a steel bar groove between the two steel bars, and gaps between the side walls of the steel bars and the steel bar groove are sequentially filled with an inner filling layer and an outer filling layer from inside to outside. According to the structure, the convention is broken, two cathode paste materials are adopted, the cathode carbon block is assembled in a composite mode, compared with a traditional cathode assembly structure, the composite assembly structure can better achieve the effects of restraining horizontal current, reducing the surface conductive resistance of a cathode steel bar and obtaining lower furnace bottom pressure drop during operation of an electrolytic cell, and meanwhile cost is greatly reduced.

The utility model discloses a high-sealing liquid-leakage-proof aluminum electrolytic capacitor structure, relates to the technical field of capacitors, and solves the problems that an existing aluminum electrolytic capacitor is connected with an aluminum shell only through extrusion of a sealing cover plate in the assembling process, then electrolyte in the aluminum electrolytic capacitor is prevented from leaking, the anti-pressure capability of the aluminum electrolytic capacitor is low, and the service life of the aluminum electrolytic capacitor is prolonged. And the aluminum electrolytic capacitor is easy to damage when being extruded, so that the quality of the aluminum electrolytic capacitor is poor. Comprising a heat-shrinkable sleeve, and an aluminum shell sleeve is arranged in the heat-shrinkable sleeve; according to the utility model, the sealing expansion glue flows into the annular fluid groove for filling expansion, so that a second sealing effect is formed between the sealing cover plate and the aluminum shell sleeve, a high sealing effect is formed between the aluminum shell sleeve and the sealing cover plate, the sealing cover plate is positioned and pressed, and the sealing cover plate is prevented from being damaged in the process of pouring the sealing glue. And the sealing cover plate is pushed upwards.

The invention provides a spinel type ceramic (at) HEA core-shell powder material and a preparation method and application thereof, and the preparation method comprises the following steps: (1) cleaning high-entropy alloy powder to obtain a high-entropy alloy matrix; (2) preparing metal salt into a solution according to a stoichiometric ratio, dropwise adding a complexing agent and a precipitating agent into the solution, and carrying out a co-precipitation reaction to obtain ceramic coating phase slurry; (3) coating the ceramic coating phase in the slurry on the surface of the high-entropy alloy matrix through a dip-coating method or a spraying method to form a high-entropy alloy precursor; and (4) sequentially grinding and sintering the high-entropy alloy precursor to obtain the spinel type ceramic (at) HEA core-shell powder material. When the spinel type ceramic coated HEA core-shell powder material prepared by the method is applied to an aluminum electrolysis inert anode material, the corrosion resistance and the mechanical strength can be remarkably improved.

The invention relates to the technical field of aluminum electrolytic capacitors, in particular to an anode foil production device and method for an aluminum electrolytic capacitor. Comprising a foundation assembly, the foundation assembly comprises a base, a portal frame is installed on the top of the base, and a hollow conveying belt is installed in the base; a drying assembly is installed in the portal frame and comprises an upper drying bin fixedly connected into the portal frame, and an upper drying rod is arranged at the bottom of the upper drying bin. A lower drying bin is fixedly connected into the base and located in the middle of the hollowed-out conveying belt, and a lower drying opening is formed in the upper portion of the lower drying bin. Aiming at the defects in the prior art, the invention provides the anode foil production device and method for the aluminum electrolytic capacitor, which can effectively solve the problems of anode foil deformation and surface damage caused by overlarge airflow impact during drying and material performance change caused by local high temperature in the prior art.

The invention discloses an energy flow and carbon flow monitoring, evaluating and optimizing system for an aluminum electrolysis production process, and belongs to the technical field of energy conservation, emission reduction and intelligent control in the metallurgical industry. The system design method comprises the following steps: designing an edge layer of the aluminum electrolysis production process energy flow and carbon flow control system, and inputting data collected by the edge layer into an energy flow-carbon flow coupling model in the cloud layer through the communication layer to execute analysis operation; an improved multi-objective genetic optimization algorithm is constructed in the cloud layer, and an optimal process parameter combination is obtained by optimizing an objective function; performing dynamic regulation and control, closed-loop feedback and exception handling operation through an execution mechanism of the edge layer; and performing comparative analysis and economic analysis on the designed aluminum electrolysis production process energy flow and carbon flow control system. Key parameters of an aluminum electrolysis process are monitored in real time through a multi-source data fusion technology, an energy efficiency-carbon emission correlation evaluation system is established in combination with big data analysis, and an electrolytic cell process parameter dynamic adjustment strategy is generated based on a self-adaptive optimization algorithm.

The invention relates to an anode carbon block provided with a conductive connection concave groove, which is mainly applied to the assembly configuration of an anode conductive device of an aluminum electrolysis cell and the production of electrolytic aluminum. In order to overcome the technical defects of high voltage drop, high assembly energy consumption, complex process and high construction cost of an anode conductive device formed by assembling an anode carbon block and an anode steel claw together by casting a ferrophosphorus ring in the prior art, the invention discloses a technical scheme of a novel construction connection mode of an anode carbon block and an anode conductive metal structure. The innovative technical scheme is characterized in that the upper part of the anode carbon block is changed into a flat-top design, and an anode conductive connection concave groove which is used for constructing and installing an anode conductive cross beam and has the section width larger than the section height is formed in the upper top part of the flat-top anode carbon block. And the anode conductive concave groove is connected with an anode conductive metal device of the aluminum electrolysis cell.

The utility model relates to the technical field of flue gas purification, and discloses an aluminum electrolysis flue gas purification device which comprises a purification bin, a gas inlet is fixedly formed in the left side of the purification bin, a gas outlet pipe is fixedly installed in the purification bin, the gas outlet pipe is communicated with the gas inlet, and a spraying pipe is rotatably installed in the purification bin. According to the device disclosed by the utility model, the worm is rotated through the operation of the motor I, the rotation of the worm drives the worm gear I to rotate, the gear ring further drives the spraying pipe to slightly swing, the rotation of the worm also drives the worm gear II to rotate, and the knocking head further starts to knock the filter plate, so that the filter plate vibrates. The vibration mechanism and the swing mechanism operate at the same time, the spraying range of the spraying pipe is larger, blocking of the filter plate is avoided, the flue gas purification efficiency is improved, and smooth dust filtering is guaranteed.

The invention belongs to the technical field of aluminum electrolysis waste recovery treatment, and particularly relates to a comprehensive utilization method for aluminum electrolysis waste. The method comprises the following steps: after crushing the aluminum electrolysis waste, reacting the crushed aluminum electrolysis waste with an alkaline solution to generate a mixed solution containing a sodium metaaluminate component and filter residues A; washing the filter residue A for multiple times, and extracting a sodium fluoride saturated solution and a filter residue B; heating and evaporating the mixed solution to separate out sodium fluoride; the pH value of the solution is adjusted through carbon dioxide, and a high-purity aluminum hydroxide and sodium carbonate solution is prepared; separating the washed mixed solution by adopting an electrochemical method to obtain a hydrogen fluoride / ammonium fluoride solution and a sodium hydroxide / sodium carbonate / sodium bicarbonate solution; reacting the filter residue B with dilute acid to prepare a lithium-containing solution, purifying and concentrating, adding sodium carbonate to precipitate lithium to prepare a lithium carbonate product, and reacting aluminum hydroxide with hydrogen fluoride to prepare high-purity aluminum fluoride. According to the method, comprehensive recovery of the aluminum electrolysis waste is achieved, environmental pollution is effectively reduced, and the utilization rate of resources is increased.

The invention relates to an electrolytic aluminum waste cathode carbon resource recycling method which comprises the following steps: S1, mixing aluminum electrolysis waste cathode carbon with aluminum salt, and carrying out dry ball milling to obtain a ball milling material; s2, the ball-milled material is leached with an acid solution and filtered, and first-section leached residues and first-section leached liquid are obtained; s3, mixing the first-stage leaching residues with solid alkali, and roasting to obtain a sintered material; washing and filtering the sintered material to obtain second-stage filtrate and filter residues, and drying the second-stage filter residues to obtain a carbon product; and S4, adding the second-stage filtrate into the first-stage leachate until the pH value is 4.5-7.5, aging, filtering to obtain a third-stage leachate and third-stage filter residues, and roasting the third-stage filter residues to obtain an aluminum-fluorine product. According to the method, the waste cathode carbon is leached in the aluminum salt low-acid environment, the reaction environment is milder, and meanwhile the leaching efficiency is not reduced. And through further low-temperature alkali fused salt roasting, fluoride in the waste cathode carbon is removed, and the purity of the obtained carbon product is high.

The invention discloses a method for preparing an aluminum-titanium intermediate alloy through aluminothermic self-reduction of molten salt, which comprises the following steps: selecting cryolite molten salt for aluminum electrolysis as a reaction medium, taking molten aluminum as a reducing agent and taking TiO2 as a raw material; the method comprises the steps that cryolite molten salt with a certain proportion is firstly put into a reduction device, a certain amount of TiO2 powder is added, stirring is conducted for 10-30 min under the inert atmosphere condition, and TiO2 is sufficiently and rapidly dissolved in the molten salt; molten aluminum is added under the inert atmosphere and the stirring condition, after aluminothermic self-reduction is conducted for 10-60 min, standing is conducted for a certain time to enable an alloy phase and molten salt to be layered, and then a metal phase and molten salt are separated. According to the invention, the environment-friendly TiO2 is adopted as a raw material to directly prepare the aluminum-titanium intermediate alloy, so that the production cost is greatly reduced; the heat generated by aluminum reduction is used for maintaining the reaction, the molten aluminum is prevented from being oxidized in the inert atmosphere, the dissolution speed of TiO2 dissolved in cryolite melt can be increased through reduction in the stirring environment, the dynamic condition of aluminum reduction is also strengthened, and the speed of in-situ generation of the aluminum-titanium intermediate alloy is greatly increased.

The invention provides an aluminum electrolysis process practical training platform based on multi-modal data, an evaluation method and equipment. The evaluation method comprises the following steps: acquiring log record data and video data in an aluminum electrolysis process practical training process, and acquiring sensor data of industrial equipment in an aluminum electrolysis workshop; an LSTM network is used for processing sequence data, the long-term dependency relationship in log record data can be captured, and the sequence and logic of aluminum electrolysis process operation can be understood; processing the video data by using a CNN network, and extracting key features in the video; processing sensor data using a full connection layer; and a full connection layer is used as a fusion layer, and outputs of the networks are fused. According to the method, different deep learning networks are adopted to process different data, the extracted features are more representative, and the reliability of a result obtained through fusion is higher; the actual operation effect of the aluminum electrolysis process can be reflected and evaluated more accurately, more valuable feedback is provided, and the aluminum electrolysis process is controlled and optimized.

The invention relates to the technical field of aluminum electrolytic capacitor electrolyte processing, in particular to a high-performance aluminum electrolytic capacitor electrolyte and a preparation method thereof. The invention discloses a water-soluble conductive agent, which is prepared from the following raw materials in percentage by weight: 5 to 10 percent of conductive salt, 0.1 to 2 percent of corrosion inhibitor, 3 to 5 percent of butyl-terminated fatty alcohol-polyoxyethylene ether, 2 to 5 percent of polyacrylic acid-polyacrylamide diblock copolymer, 0.5 to 2 percent of additive, 0.5 to 2 percent of straight-chain polycarboxylic acid, 6 to 10 percent of ionic liquid and the balance of solvent, the butyl-terminated fatty alcohol-polyoxyethylene ether has the structural formula of R-O-(CH2CH2O) xCH2CH2OBu, r represents a fatty alcohol group, is C12-18 alkyl, and is a straight chain or a branched chain; n is the addition number of ethylene oxide, and x is equal to 10-50; through the synergistic effect of the components in the formula, a stable and efficient electrolyte system is formed, the performance and reliability of the aluminum electrolytic capacitor in severe environments such as high temperature and low temperature are remarkably improved, the service life of the aluminum electrolytic capacitor is prolonged, and the requirements of modern electronic equipment for high-performance capacitors are met.

The invention belongs to the field of paper for aluminum electrolytic capacitors, and particularly relates to a high-voltage-resistance low-loss electrolytic capacitor diaphragm and a preparation method thereof. According to the diaphragm, a plant fiber single-layer paper base with the beating degree of 90-98 degrees SR is adopted, hydrophilic polymer coatings distributed in a discontinuous point shape are formed on the two surfaces of the diaphragm through gravure coating, the coating coverage rate ranges from 20% to 70%, and the total gluing amount ranges from 0.2 g / m to 6.0 g / m. According to the structure, on the premise that the thickness is not obviously increased, the smoothness of the diaphragm is obviously reduced, and the electrolyte adsorbability is enhanced, so that the ESR is reduced to 20-22 m omega, and meanwhile, it is ensured that the breakdown voltage is larger than or equal to 550 V. The aluminum electrolytic capacitor is suitable for high-performance and miniaturized aluminum electrolytic capacitors.