327 results about "Graphite electrode" patented technology

The invention provides a method for making foam slag in LF (ladle furnace) refining by using a waste graphite electrode, which specifically comprises the following steps: grinding the waste graphite electrode to obtain graphite electrode powder, and adding limestone as a foaming agent in the LF refining. 0-1.25 kg / t of steel limestone is added firstly, and 0.018-0.19 kg / t of steel graphite electrode powder is added every 2 min. Compared with the prior art, by utilizing the characteristics of high carbon content, high conductivity and low sulfur of the graphite electrode, the invention aims to realize submerged arc heating, reduce power consumption and shorten refining time so as to meet the requirement of continuously increasing LF smelting indexes under the high-quality development trend of steelmaking.

The invention belongs to the technical field of cooperative control, and belongs to an ultrahigh-power graphite electrode roasting multi-parameter cooperative control method and system, and the method comprises the steps: collecting full-dimensional operation parameters of a roasting system, carrying out the partition division of a roasting furnace, and collecting the coupling state data of each partition in real time. And identifying different roasting abnormal scenes based on the coupling state data, and constructing process collaborative risk data under different roasting abnormal scenes in combination with the stage of the current roasting process and the aging state of the furnace body. And marking a to-be-adjusted parameter set in the cooperative control strategy according to the process cooperative risk data, and performing adjustment to obtain an optimized cooperative control strategy. According to the balance degree index, performing comprehensive evaluation on each control node in the optimization cooperative control strategy, defining the control nodes which do not pass the evaluation as risk nodes, and generating a risk adjustment strategy pointing to the risk nodes; according to the method, multi-target collaborative optimization can be realized, the production cost is reduced, and the stability and controllability of the roasting process are improved.

The invention discloses a preparation method of a threaded joint of a graphite electrode, which comprises the following steps: material preparation: carrying out mixing kneading, molding, roasting and graphitization treatment on needle coke aggregate and a coal pitch binder to prepare a graphite joint blank; in the mixing and kneading process, graphene nanosheets with the mass percent of 0.5%-5% are added into raw materials to serve as conductive reinforcing phases, dispersion of the raw materials is promoted through the technology of combining ultrasonic dispersion and mechanical stirring, and the graphite material with the volume density larger than or equal to 1.70 g / cm < 3 >, the apparent porosity smaller than or equal to 3% and the axial conductivity larger than or equal to 5 * 10 < 4 > S / m is obtained. Compared with the prior art, the preparation method of the threaded joint of the graphite electrode has the advantages that the threaded joint can adapt to the high-temperature working condition, connection stability is kept, the conductivity is excellent, and the service life is long.

The invention relates to the technical field of material surface engineering and metallurgical equipment, in particular to a composite coating for prolonging the service life of a crystallizer copper plate and a plasma spraying preparation method thereof.The composite coating comprises, by mass, 35%-55% of chromium, 20%-55% of nickel, 5%-10% of titanium diboride, 0.1%-0.3% of niobium and the balance chromium carbide and inevitable trace impurity elements. According to the invention, titanium diboride and chromium carbide are used as main hard reinforcing phases, so that the coating shows excellent wear resistance at normal temperature and high temperature; a hollow graphite electrode is adopted in the spraying process, plasma arc is generated, and meanwhile an ablation product (carbon) provides a carbon source for formation of chromium carbide; the titanium powder and the boron powder are subjected to an in-situ reaction in a plasma arc to generate titanium diboride, and the in-situ synthesis technology enables hard phase particles to be fine and uniformly distributed, and forms a firm interface with a metal binding phase, so that the problems of interface pollution and weak combination caused by the addition of the hard phase are avoided.

This invention provides an electrode device having a support for engaging and holding a graphite electrode used in the manufacture of a quartz crucible via arc discharge. The electrode device is characterized in that the outermost surface layer of the support, at the portion adjacent to the graphite electrode when the support is engaged with the graphite electrode, has an anti-fouling film. Thus, an electrode device is provided that can suppress contamination from the support, shorten the lifespan of the graphite electrode, and reduce manufacturing costs.

The utility model discloses a graphite electrode forming cooling water inlet device which comprises a machine frame, a water storage tank fixed in the machine frame, an inner container concentrically sleeved in the water storage tank in the Z-axis direction and an arc-shaped hanging basket welded and fixed at one end in the inner container. A lifting assembly used for driving the upper concentric-square-shaped frame, the inner container and the arc-shaped hanging basket to slide in the Z-axis direction is installed on the outer wall of one side of the machine frame. A plurality of graphite electrode workpieces to be cooled in water in the same batch are placed in the arc-shaped hanging basket, the lifting assembly controls the upper concentric-square-shaped frame, the inner container and the arc-shaped hanging basket to be immersed in the water storage tank, so that the graphite electrode workpieces are cooled, and the lifting assembly drives the arc-shaped hanging basket to move upwards after cooling is completed. And the graphite electrode workpiece in the arc-shaped hanging basket is separated from the cooling liquid.

The invention relates to the technical field of vacuum furnace electrode quick connection, in particular to a high-temperature vacuum furnace graphite electrode quick connection structure which comprises a copper bar, a furnace body electrode base, a copper end connecting piece, a graphite end connecting piece and a graphite lock nut. The detachable copper end connecting piece and the graphite end connecting piece are adopted to be connected with the water cooling copper electrode and the graphite special-shaped electrode respectively, the plane where the conductive end A of the copper end connecting piece and the plane where the conductive end B of the graphite end connecting piece are located are machined precisely, sufficient attachment is guaranteed, and the conductive requirement is met. And when the special-shaped electrode in the vacuum furnace is worn and needs to be replaced, the replacement operation can be completed only by quickly disassembling the single end in the vacuum furnace.

The utility model discloses a graphite electrode fixing device of arc furnace, including arc furnace top cover, the top fixedly connected with hollow frame of arc furnace top cover, the top of hollow frame is equipped with the T type hand pole of rotating joint with it, the bottom fixedly connected with driving bevel gear of T type hand pole, the driving bevel gear is engaged with three driven bevel gears, every driven bevel gear all is equipped with clamping mechanism, every graphite electrode body's both sides all are equipped with clamping plate, the opposite end of two clamping plates all are fixedly connected with insulating plate, and the central mechanism is equipped between two clamping plates. The utility model discloses single drive source through bevel gear transmission's mode, can drive multiple clamping components synchronous action simultaneously, simplifies the operation process, ensures the even force of electrode in the installation process, avoids the eccentricity of installation due to the uneven clamping force, improves electrode service life and smelting effect.

The invention relates to the technical field of graphite electrode roasting, and discloses a method for impregnating a graphite electrode through secondary roasting. Through the synergistic effect of an intelligent cooperative temperature control method, a whole-process inert protection system, a waste heat gradient utilization path and clean combustion directional pollution discharge, high-precision stable temperature control of the secondary roasting procedure is achieved, the activation temperature fluctuation of the coke powder is compressed to be within, the activation uniformity of the coke powder and the roasting consistency of the green body are guaranteed, and the quality of the green body is improved. The mechanical strength and the conductivity of the graphite electrode are greatly improved, the oxidation loss rate of a green body is reduced to below 0.08% through a nitrogen gas curtain and a multi-stage oxygen removal design, pollutant degradation is avoided, a protective medium is protected, meanwhile, the waste heat utilization rate is greatly improved, the fuel gas consumption is reduced, and the reuse frequency of coke powder is increased by utilizing the waste heat of one-time roasting; and finally, double improvement of product quality stability and production economy is realized.

The invention relates to the technical field of graphite production, in particular to an extrusion forming device for graphite production, which comprises a worktable and a support frame mounted above the worktable, a vertical rod is mounted in the middle of the upper surface of the worktable, and forming cavities are mounted on the outer side of the vertical rod at equal intervals through a regulation and control assembly; an electric push rod is fixed to the middle of the supporting frame in a penetrating mode, a supporting plate is installed at the output end of the electric push rod, and a pressing head and a pushing column are installed below the right side and the rear side of the supporting plate correspondingly. According to the extrusion forming device for graphite production, the vertical rods drive the four sets of forming cavities installed on the outer side at equal intervals to rotate, meanwhile, the supporting plates drive the pressing heads and the material pushing columns to move downwards together, and therefore the pressing heads conduct extrusion forming on paste in the corresponding forming cavities under the pressing heads; and the formed graphite electrode biscuit in the corresponding forming cavity under the pushing column is pushed out and demolded by the pushing column, so that the continuous batch extrusion forming efficiency of the graphite electrode can be improved.

The present application relates to the field of graphite preparation, a preparation process of large-size graphitized furnace head conductive electrode, comprising: mixing, mixing and kneading, vibration forming, baking furnace baking to obtain electrode blank, using series connection type graphitization furnace for graphitization, starting power 2415kW, rising to 2938kW for 6.5 hours, falling to 2455kW for 3 hours, rising to 5306kW for 40 hours, rising to 6595kW for 6.5 hours, rising to 12000kW. The power supply curve of the present application, aiming at large-size graphite electrode, ensures that the internal stress and volatile matter in the graphitization temperature rising process are within the controllable range; aiming at the high sulfur content of sponge coke and projectile coke in the electrode blank formula, the rapid reaction and release of sulfur and sulfur carbon compounds during high temperature heating are controlled, the internal force generated during graphitization is reduced, thereby reducing cracks, preventing the formation of small holes and cracks in the electrode, and improving the density and conductivity.

The application relates to the field of graphite electrode baking technology, and discloses a method for baking and impregnating graphite electrodes in two steps; through the synergistic effect of the intelligent collaborative temperature control method, the whole-process inert protection system, the waste heat step-by-step utilization path and the clean combustion directional pollution discharge, high-precision temperature stability control of the two-step baking process is realized, the coke powder activation temperature fluctuation is compressed to 10-20 DEG C, the uniformity of coke powder activation and the consistency of blank baking are ensured, the mechanical strength and the electric conductivity of the graphite electrode are greatly improved, through the nitrogen gas curtain and the multi-stage oxygen removal design, the blank oxidation loss rate is reduced to below 0.08%, the pollutants are prevented from degrading the protective medium, meanwhile, the waste heat of the first baking is utilized, the waste heat utilization rate is greatly improved, the fuel gas consumption is reduced, and the reuse times of the coke powder are increased, finally, the product quality stability and the production economy are improved.

The present application relates to a kind of coking wastewater advanced treatment method and system, method includes: the water quality characteristics of coking wastewater are pre-configured with modified polyurethane suspended filler, modified anode electrode and modified fly ash filler;Coking wastewater is sent into biochemical pool and carries out biochemical reaction, and modified polyurethane suspended filler is placed in biochemical pool;The effluent of biochemical pool is sent into electro-catalytic oxidation device and carries out electrolysis reaction, and electro-catalytic oxidation device uses modified anode electrode as anode electrode, and uses graphite electrode as cathode electrode;The effluent of electro-catalytic oxidation device is sent into filler adsorption tower and carries out adsorption treatment, and modified fly ash filler is placed in filler adsorption tower.The present application is pre-configured with modified polyurethane suspended filler, modified anode electrode and modified fly ash filler for coking wastewater advanced treatment for the water quality characteristics of coking wastewater, can economically and efficiently reduce the content of TOC, total fluorinated alkyl compound and total cyanide in coking wastewater.

The application is an array type electrostatic sensor, a projectile velocity measuring device and method based on the sensor. The array type electrostatic sensor is in the shape of a tube coaxially arranged behind the projectile outlet and the barrel or bore body, and a plurality of circumferentially arrayed graphite electrodes in a pleated triangle structure are arranged at the upstream and downstream cross sections along the axis of the tube. The measuring device comprises an induction unit, a signal conditioning unit and an analysis and calculation unit, obtains the electrostatic induction signal component belonging to the projectile, then according to the velocity range of different projectile models, selects the electrostatic induction signals of the electrodes at different positions in different cross sections to reconstruct the charge distribution and establish the cross correlation sensitivity matrix, and further based on the correlation focusing principle of the electrodes at different cross sections, proposes a data fusion algorithm of multiple sensor electrodes, and finally measures the muzzle projectile velocity. The application proposes to use electrostatic field sensing measurement as a new means for projectile testing in view of the complex environment of high temperature and high pressure at the muzzle.

The utility model discloses a graphite electrode detection device, which belongs to the field of graphite electrode detection, and comprises a case, a graphite electrode detection device and a graphite electrode detection device, and the two groups of conveying components are correspondingly mounted on the two side surfaces of the case respectively, and are used for guiding and conveying the graphite electrodes. According to the graphite electrode detection device disclosed by the utility model, the graphite electrode can be quickly slid through the arranged conveying component and the plurality of groups of rollers, when the graphite electrode slips onto the belt conveyor, the graphite electrode can be conveyed to a specified position by starting the belt conveyor, and the graphite electrode can be clamped and fastened through the arranged clamping and fastening component. When the two sets of clamping and fastening plates make contact with the graphite electrode, clamping and fastening operation on the graphite electrode can be completed, and the situation that the graphite electrode shakes and shifts in the detection process, and consequently errors occur in appearance detection can be effectively prevented.

The application belongs to the technical field of two-dimensional materials, and relates to a method for preparing two-dimensional MXene materials through high-energy electric shock fluorinated salt etching in seconds, which comprises the following steps: 1) after grinding and mixing of a parent phase MAX powder and a fluorinated salt, the mixture is loaded into a quartz tube of a high-energy electric shock device, graphite electrodes are inserted into two ends of the quartz tube, and the material is compacted to be in close contact with the electrodes; 2) after completion of capacitor charging of the high-energy electric shock device, a discharge button is opened, high-energy electric shock is performed, the reaction is completed after flash phenomenon occurs, fluorinated salt is supplemented, and electric shock is repeated for 2-3 times; 3) the product after electric shock is ground and washed with acid, and after washing with deionized water until neutral, standing or centrifugal layering is performed, and the MXene two-dimensional material is obtained from the upper layer. Through high-energy electric shock, the reaction is completed in an instant, the comprehensive energy consumption is lower, and the etching efficiency is faster, and due to fast reaction time, high-temperature oxidation of the MXene can be effectively inhibited, and the application prospect is better.

The invention discloses an in-situ characterization method of graphite electrode microstructure stress in an electrochemical process. The in-situ characterization method comprises the following steps: measuring microstructure three-dimensional strain evolution information in situ by adopting a spectrum comprehensive technology; calculating modulus evolution of the typical lithium intercalation structure by adopting DFT (Discrete Fourier Transform); and establishing an electrochemical induced stress characterization model based on microstructure strain and modulus. The invention provides a novel electrochemical induced microstructure stress characterization method based on experiments, simulation and modeling, key factors such as microstructure anisotropy, strain types, modulus nonlinearity and the like are considered, the accuracy of mechanical description is ensured, and comprehensive characterization of microstructural mechanics is realized. Based on the provided microstructure stress characterization method, the important function of graphite electrode microstructural mechanics in the lithium storage process can be analyzed, meanwhile, the method can be further popularized to other layered electrode materials and sodium and potassium storage systems, and an important means is provided for mechanical-electrochemical coupling analysis.

An electrochemical method for preparing N-arylsulfonylimine compound, comprising the following steps: in air atmosphere, a sulfoximine compound and an alpha-keto acid are added into a reactor in a molar ratio of 1:2, an electrolyte tetrabutylammonium tetrafluoroborate, a catalyst nickel bromide are added, and then an acetone solution is added; the mixture is stirred by a magnetic stirring device, and is dissolved; two electrodes are inserted, a graphite electrode is used as a positive electrode, and a platinum sheet electrode is used as a negative electrode; 6mA of current is passed, and the current passing time is 3h; after the reaction is completed, the solvent is removed by vacuum evaporation to obtain a crude product, and the N-arylsulfonylimine compound is obtained by column chromatography purification. Compared with a traditional synthesis method, the method has the advantages that the reaction condition is mild, can be successfully carried out at room temperature, operation is simple, all operations can be carried out in an open system, an electric current is used as an oxidation method, pollution of a chemical oxidant is avoided, raw materials are easy to obtain, functional group compatibility is good, and the scope of application of a substrate is wide.

The invention provides a graphitized carburant and a preparation method thereof, and relates to the technical field of carburant preparation. The graphitization carburant is prepared from pretreated petroleum coke, purified graphite electrode waste, wood charcoal, carboxymethyl cellulose sodium and modified starch, wherein the pretreated petroleum coke is obtained by soaking petroleum coke in alkali liquor, cleaning with ethanol, drying, filling oxygen under the pressure of 3-5 Mpa for high-pressure treatment and calcining; the modified starch is obtained by gelatinizing cassava starch, performing microwave shaping and crushing. According to the method, the defects in the prior art are overcome, the purity of the carburant can be effectively guaranteed, meanwhile, the recarburization effect of the carburant is further improved, and the economic benefit of overall production is improved.

This work investigates the beneficial roles of lithium bis(trimethylsilyl) phosphate (LiTMSP) which may act as a novel bifunctional additive for lithium ion batteries, in particular, LiNi0.5Mn1.5O4 (LNMO) / graphite cells. The cycle performance of LNMO / graphite cells is significantly improved with incorporation of LiTMSP. Trimethylsilyl functional group therein can react with HF generated through hydrolysis of LiPF6 by residual water in electrolyte solution, followed by a decrease in the concentration of metal ions dissolution from the electrode. The generation of superior passivating surface film derived by LiTMSP on graphite electrode, suppressing further electrolyte reductive decomposition and deterioration / reformation caused by migrated metal ions, is confirmed. Furthermore, LiTMSP derived surface film is likely to have better lithium ions conductivity with a decrease in resistance of the graphite electrode, improving rate performance of cells. The HF scavenging and film-forming effects of LTMPS are responsible for the less polarization of cells enabling to improve cycle performance.

The invention provides a method and a device for dehydration consolidation and directional migration of sludge containing heavy metals, belongs to the technical field of electric consolidation and heavy metal migration, and solves the problems of low sludge dehydration efficiency, unknown heavy metal migration mechanism and poor removal effect in the prior art. The method comprises the following steps: filling a reaction device with sludge containing heavy metals; graphite electrode plates are arranged at the two ends, and filter paper and a permeable stone isolation layer are laid between the electrodes and the sludge; and applying 0.5-2.0 V / cm direct-current voltage gradient for 12-72 hours, maintaining the environment temperature of 25 + / -2 DEG C, driving pore water to migrate to a cathode through electroosmotic flow, dehydrating and solidifying, and meanwhile, enabling heavy metal cations to migrate directionally by utilizing an electrophoresis effect. The matching device comprises an organic glass box body, an adjustable graphite electrode and a current detection and temperature control system. The sludge dewatering efficiency is effectively improved, the method has wide application prospects in the fields of river sludge treatment, polluted site remediation and the like, and a new technical approach is provided for solving the problem of heavy metal polluted sludge treatment.

This invention discloses a carbon filler for blast furnace bottoms and its preparation method. The carbon filler comprises component A and component B; wherein: component A, by mass percentage, includes: 17-25% electrode graphite particles, 50-55% flake graphite, 20-26% electrode graphite powder, 3-5% flexible graphite, and 0.3-1% accelerator; component B includes thermoplastic phenolic resin and ethanol in a mass ratio of (4-6):(1-2); the amount of component B added is 19-22% of the weight of component A. The carbon filler is prepared by pre-mixing flake graphite and flexible graphite evenly, then mixing and stirring with a portion of component B, then adding electrode graphite particles, electrode graphite powder, and accelerator and mixing evenly, and finally adding the remaining component B and mixing evenly. The carbon filler obtained by this invention has good workability, thermal conductivity, and surface quality, increases the bonding performance between the material and the filling area, and effectively protects the furnace lining.

The invention discloses a system for continuously preparing graphene through an electrochemical stripping method. The system comprises a stripping assembly, a separating and collecting assembly and a continuous material supplementing assembly. The stripping assembly comprises an electrolytic tank, a graphite electrode device and a counter electrode device, electrolyte is contained in the electrolytic tank, the graphite electrode device and the counter electrode device are both immersed in the electrolyte, the graphite electrode device is coaxially arranged in the counter electrode device, the graphite electrode device is connected with the positive electrode of the direct-current power source through a positive wire, and the counter electrode device is connected with the negative electrode of the direct-current power source through a negative wire. The counter electrode device is connected with the cathode of the direct-current power supply through a cathode wire; and the continuous material supplementing assembly is communicated with the electrolytic tank through a material supplementing pipeline. The invention further discloses a method for continuously preparing the graphene through the electrochemical stripping method. The device has the beneficial effects that the graphite electrode device and the counter electrode device are coaxially arranged inside and outside to form an annular electrode structure, so that the electric field edge effect of a planar electrode is avoided, the electric field distribution is more uniform, and the intercalation and stripping efficiency between graphite layers is further improved.

The present application relates to graphite electrode production feeding technology field, especially to a kind of graphite electrode production feeding equipment, including support platform, operation display system, material box, horizontal feeding system and vertical feeding system;The present application is aimed at the problem that the end of feeding is blocked or adhered to affect metering and weighing, first, through the continuous rotation of spiral roller, the inside pipe is actively dredged;Combined with the revolution plus rotation movement of wall-sticking scraping unit, the fine powder adhered to the pipe wall is continuously scraped during the conveying process, to prevent the formation of material accumulation layer, forming mechanical dynamic scraping cleaning;Combined with airflow pulse assembly, not only provide continuous air curtain isolation, its periodic high pressure pulse generates micro-impulse wave, effectively shakes the material bridge or soft blockage just formed, forms airflow pulse disturbance protection, the above three aspects work together to solve the end material accumulation problem, realize the high-precision, high-stability conveying requirement of carbon powder mixture in graphite electrode production.

The invention relates to the field of ferrous metallurgy and high-temperature material engineering, in particular to a preparation method and application of a silicon steel annealing furnace roller surface coating based on a double-hollow graphite electrode plasma arc melting diamond-graphite composite coating. A current loop is formed, so that plasma arcs are generated between the electrodes; diamond powder, graphite powder and modified zirconium oxide powder are mixed, nickel-based self-fluxing alloy powder is added, and mixed powder is obtained; argon serves as carrier gas, and the mixed powder is fed into a plasma arc area through a double-hollow graphite electrode; the surfaces of the mixed powder particles are activated and are metallurgically bonded with the surface of a partially molten roller base material by utilizing high temperature and high energy generated by a plasma arc, and a diamond-graphite composite coating is formed on the surface of the roller in a cladding manner; and carrying out post-treatment on the diamond-graphite composite coating according to requirements.

The invention relates to a method for preparing graphene by stripping graphite through electrochemical anode intercalation, and belongs to the technical field of graphene preparation, the method comprises the following steps: S1, carrying out pre-intercalation treatment on a graphite electrode to obtain an intercalated expanded graphite electrode; s2, taking the intercalated expanded graphite electrode in the S1 as an anode, taking a platinum sheet electrode as a cathode, putting the anode and the cathode into the electrolyte, and electrifying to complete first stripping; and S3, replacing the anode in the S2 with a platinum sheet electrode, electrifying, carrying out secondary stripping to obtain a graphene mixed solution, and filtering and washing the graphene mixed solution after stripping to obtain the graphene material. Compared with the prior art, the preparation method has the advantages that graphene is prepared through secondary stripping, the first stripping utilizes intercalation expansion of a graphite electrode, and Van der Waals' force between graphite layers is destroyed through voltage gradient change; in the second stripping process, a stable electric field is maintained through a platinum sheet electrode, graphite electrode consumption is avoided, and stripping efficiency and product uniformity are improved.

The invention discloses a predictive maintenance system for graphite electrode production equipment, and relates to the technical field of industrial automation control, and the system comprises a cloud management center which is in communication connection with the following modules: a sensor monitoring configuration module which is used for deploying a main thermocouple and a slave acoustic / infrared node in each high-temperature area of a graphitization furnace, a high-temperature area dual-redundancy sensing network is formed, and equipment operation data in the graphite electrode production process are collected; and the temperature measurement error compensation module is used for calibrating the acoustic temperature measurement error when the acoustic temperature measurement is switched to. Through combination of decentralized control and the ant colony algorithm, acoustic temperature measurement errors can be analyzed, a minimum error path is dynamically searched among multiple sensors, the problem of observation blind areas caused by failure of a single sensor is effectively solved, the accuracy and reliability of temperature measurement are remarkably improved, and the method is suitable for popularization and application. Therefore, the prediction precision of the potential fault of the graphite electrode production equipment is improved, and the false alarm and the missing alarm are reduced.

The utility model discloses a graphite electrode end grinding device which comprises a base and further comprises a mounting plate and a grinding mechanism, the mounting plate is connected to the top of the base in an inserted mode, the grinding mechanism is arranged on the surface of the mounting plate, and the grinding mechanism comprises a transmission shaft, a motor, a belt wheel, a transmission belt, a conical sleeve and a grinding strip. A transmission shaft is horizontally mounted in the mounting plate, a motor is horizontally mounted on one side of the surface of the mounting plate, the end of the conical sleeve is aligned to the end of the graphite electrode, the motor is started, the motor drives the conical sleeve and the grinding strip in the conical sleeve to rotate through cooperation of a belt wheel, a transmission belt and the transmission shaft, and the base is moved towards one side of the graphite motor in the rotating process; and in the sleeving process, the grinding strip structure rotating at a high speed is used for completing grinding treatment on the end of the graphite electrode, the grinding efficiency is improved, and the labor amount of machining personnel is reduced.

The invention discloses a laminated battery cell as well as a preparation method and application thereof. The laminated battery cell provided by the invention comprises a negative pole piece, the negative pole piece consists of a pole piece A and a pole piece B; the pole piece A is a graphite pole piece and is positioned in the battery cell; the B pole pieces are lithium-plated graphite pole pieces and are positioned on the upper surface and the lower surface of the battery cell, and the outer side surfaces of the B pole pieces are subjected to lithium plating treatment. According to the invention, lithium is embedded into graphite crystal lattices (LixC6) in an atomic state, so that the purpose of increasing battery circulation by supplementing lithium can be achieved, and potential safety hazards caused by built-in lithium metal can also be avoided.

The application belongs to the technical field of graphite electrode materials, and relates to a method for repairing and recycling graphite negative electrode material by differential two-step plasma ball milling and a negative electrode material obtained by the method. The method comprises the following steps: after being subjected to acid pickling, water washing and drying, the recycled graphite negative electrode material is divided into A group and B group; the A group is subjected to high-power plasma ball milling, so that the A group is peeled off into few-layer graphene and activated; and then the B group is added and subjected to low-power plasma ball milling, so that the crystal structure of the graphite of the B group is repaired and the particles are refined. The half-height width of the (002) crystal face X-ray diffraction peak of the obtained repaired graphite negative electrode material is smaller than that of the original recycled graphite, the Raman spectrum ID / IG value is reduced, and the structural order degree is significantly improved. The method realizes integrated integration of efficient repair of the graphite crystal structure, surface cleaning and activation, and reconstruction of the conductive network, and the obtained material has the advantages of excellent high-rate charge-discharge performance and long cycle life.