286 results about "Graphite anode" patented technology

The invention specifically discloses a lithium ion battery. The lithium ion battery comprises a positive plate and a negative plate, the positive plate comprises a positive active material, and the positive active material is in four-stage grain composition and comprises first-stage grains, second-stage grains, third-stage grains and fourth-stage grains; the primary particle size R1 of the first-stage particles is smaller than 100 nm, and the first-stage particles account for 5%-30% of the positive electrode active material; the primary particle size R2 of the second-stage particles is more than or equal to 100nm and less than 400nm, and the proportion of the second-stage particles in the positive electrode active material is 10-50%; the primary particle size R3 of the third-stage particles is greater than or equal to 400 nm and less than 1000 nm, and the third-stage particles account for 5-30% of the positive electrode active material; the primary particle size R4 of the fourth-stage particles is larger than or equal to 1000 nm and smaller than or equal to 4000 nm, and the fourth-stage particles account for 5%-20% of the positive electrode active material; the negative plate comprises a graphite negative electrode material, the residual carbon content of the surface of the graphite negative electrode material is 0-5%, and the graphitization degree of the graphite negative electrode material is 90-97%. The method has the advantage of improving the energy density and high-temperature performance of the lithium battery.

The invention discloses a graphite negative electrode powder laser particle size detection device, relates to the field of particle size detection, and solves the problem that an existing particle size detection device is difficult to continuously detect multiple batches of graphite samples, the graphite negative electrode powder laser particle size detection device comprises a device shell and a control top plate arranged above the device shell, and a driving rod and a laser detection head are mounted at the bottom of the control top plate; stirring fan blades are installed at the bottom of the driving rod, a rotating disc is rotationally installed at the top of the device shell, and two symmetrically-distributed detection cylinders and two symmetrically-distributed cleaning cylinders are arranged at the top of the rotating disc; the lifting mechanism is used for lifting the driving rod upwards, and the lifting mechanism is mounted on the inner side of the device shell; through the lifting mechanism, in the rotating process of the rotating disc, the stirring fan blades and the driving rod are lifted upwards and reset downwards, so that the stirring fan blades and the driving rod enter the detection barrel and the cleaning barrel conveniently, particle size detection of a graphite sample and cleaning of the stirring fan blades are realized, and the effect of continuous detection is achieved.

The present invention discloses a method for preparing a lithium battery high energy density and fast charging graphite negative electrode material, comprising the following steps: mixing, briquetting, and graphitization. The modified graphene is evenly distributed in the graphite phase, and the two have good contact performance, which greatly enhances the conductivity of the graphite material and its coating layer. The amount of conductive agent added can be reduced in the manufacturing process, so that more active substances can be placed in a limited battery space, increasing the energy density of the battery; secondly, catalytic graphitization can increase the capacity of graphite to more than 360 mAh / g, further improving the energy density of the battery; the synergistic effect brought about by graphene modification and catalyst pore formation improves the fast charging performance, and graphene forms a rich conductive network between graphite and granulated coating layers, reducing system impedance and battery polarization, improving conductivity, and enhancing the rate characteristics of the battery. The catalyst volatilization will leave abundant pores, providing a convenient path for the diffusion of lithium ions, and improving the fast charging performance.

The invention discloses a nanometer silicon filled microcrystalline graphite negative electrode material and a preparation method and application thereof. The preparation method of the nano-silicon filled microcrystalline graphite negative electrode material comprises the following steps: by taking microcrystalline graphite as a base material, depositing silane between sheet layers of the microcrystalline graphite by adopting a gradient heating method to obtain a nano-silicon filled microcrystalline graphite composite material; and finally, forming the nano-silicon filled microcrystalline graphite negative electrode material with a porous structure on the surface of the nano-silicon filled microcrystalline graphite composite material through carbon source coating carbonization. According to the nano-silicon-filled microcrystalline graphite negative electrode material with the core-shell structure provided by the invention, an inner core is a silicon-graphite composite material formed by nano-silicon-filled microcrystalline graphite, nano-silicon particles are filled in the surfaces and gaps of crystalline grains of the microcrystalline graphite, volume expansion of the nano-silicon in the charging and discharging process is inhibited by a microcrystalline graphite matrix material, and particularly, the volume expansion of the nano-silicon in the charging and discharging process is inhibited by the microcrystalline graphite matrix material. And due to different structural orientations of the microcrystalline graphite, the stress effect can be counteracted, and the volume expansion of the material is further inhibited.

The invention discloses a calcining carbon removal-supercritical expansion stripping method for regenerating graphene from graphite of a waste lithium battery, and belongs to the field of lithium battery recovery and nano material preparation. Comprising the following steps: treating the waste lithium battery to obtain waste lithium battery positive and negative electrode mixed powder, and then roasting to obtain battery powder; leaching the battery powder in a nitric acid solution to obtain purified graphite slag; the method comprises the following steps: mixing graphite slag with supercritical gas fluid, treating, quickly releasing pressure to normal pressure, and separating to obtain graphene. According to the method, on the basis of interlayer structure characteristics of the waste graphite negative electrode, organic matters and amorphous carbon are removed through multi-stage calcination, a supercritical N2 / CO2 mixed fluid permeation and pressure relief expansion synergistic stripping technology is combined, and low-damage dissociation is achieved through graphite microcracks. According to the method, physical stripping and liquid nitrogen shock cooling strengthening are coupled, and the obtained graphene sheet layer is high in integrity and few in structural defect and can be directly used for manufacturing conductive composite materials and energy storage devices.

The disclosure is directed to blended anode materials including at least two types of electrochemically active components possessing different redox potentials. The anode design renders improved chemical and structural stability to that of the conventional single-phase graphite anode particularly at high and / or low electrochemical potentials.

The invention relates to the technical field of graphite negative electrode materials, and discloses a high-capacity and long-cycle graphite negative electrode material and a preparation method thereof, and the preparation method comprises the following steps: (1) respectively pre-carbonizing medium sulfur coke and commercial coke; (2) mixing the pre-carbonized medium sulfur coke and commercial coke, and graphitizing to obtain a graphitized crude product; the mixing mass ratio of the medium sulfur coke to the commercial coke is (10-90%): (10-90%), and the total mass percentage is 100%; and (3) screening and demagnetizing the graphitized crude product to obtain the graphite negative electrode material. The graphite negative electrode material is obtained by compounding the medium-sulfur coke and the common commercial coke in a specific proportion, the medium-sulfur coke and the common commercial coke can play an excellent synergistic effect, and through mutual influence among limited parameters in a two-component mixing process, excellent cycle performance of the material is ensured, processability of the material is improved, and industrial application is further expanded.

A grinding device for graphite anode processing relates to the technical field of graphite grinding, and is characterized in that the top of a grinding box is communicated and fixed with a feeding pipe, the inner side of the grinding box is rotatably connected with a material roller, the side surface of the grinding box is provided with a driving mechanism for driving the material roller to rotate, and the inner side of the material roller is provided with crushing chambers in a rotary array manner; the grinding device comprises a grinding chamber, a grinding unit is installed on the inner side of the grinding chamber, the grinding unit is in transmission connection with a grinding box through a transmission mechanism, a grinding chamber is formed in the middle of a material roller, the inner side of the grinding chamber is evenly filled with grinding balls, the grinding chamber communicates with the interior of the grinding chamber through a conveying pipe, and a one-way valve is assembled on the conveying pipe. According to the graphite powder collecting device, contact between the material and the external environment in the material collecting process is small, so that adverse effects on health of workers due to escape of graphite powder are avoided, meanwhile, the graphite powder is collected more thoroughly, and the situation that the production cost is increased due to the fact that the escaped graphite powder cannot be collected is avoided.

The invention provides a modified graphite negative electrode material and a preparation method and application thereof.The preparation method comprises the steps that sulfonated graphene and aminated carbon nanotubes are dispersed in water, and sulfonic acid groups on the surface of the sulfonated graphene and amino groups in the aminated carbon nanotubes are subjected to electrostatic interaction to be self-assembled and combined together; the preparation method comprises the following steps: preparing sulfonated graphene / carbon nano-tubes from sulfonated graphene and carbon nano-tubes to obtain a three-dimensional network compound with high elasticity and high rigidity characteristics, coating the surface of graphite with the three-dimensional network compound to obtain sulfonated graphene / carbon nano-tube-coated graphite, sequentially kneading the sulfonated graphene / carbon nano-tube-coated graphite with asphalt, and fusing with an inorganic nano-material to obtain the sulfonated graphene / carbon nano-tube-coated graphite composite material. And then carrying out carbonization treatment to form the modified graphite negative electrode material which takes sulfonated graphene / carbon nanotubes as an inner shell, takes amorphous carbon and an inorganic nano-material as an outer shell and takes graphite as a core. The modified graphite negative electrode material can give consideration to high rate performance, high energy density and high initial coulombic efficiency at the same time.

The invention provides phosphorus-doped coated asphalt and a preparation method thereof, a negative electrode material and a lithium battery. The preparation method of the phosphorus-doped coated asphalt comprises the following steps: mixing a phosphorus source and a first carbon source, and carrying out heat treatment to obtain the phosphorus-doped coated asphalt, the mass ratio of the first carbon source to the phosphorus source is 20: (1-4), and the heat treatment temperature is 100-400 DEG C. The invention also provides a negative electrode material and a lithium battery prepared on the basis of the phosphorus-doped coated asphalt. The coating layer on the surface of the graphite is modified, and phosphorus is introduced into the amorphous carbon coating layer, so that lithium storage sites of the graphite negative electrode material can be increased, and the specific capacity of the material is improved; meanwhile, the structure of the coating layer can be improved, the short-range ordered structure of the doped coating layer is increased, the interlayer spacing is enlarged, and the rate capability of the graphite negative electrode material is improved.

The invention discloses a method for preparing silicon carbide from a silicon waste material and a waste lithium ion battery graphite anode. The method specifically comprises the following steps: (1) respectively carrying out ball milling and mixing on the diamond wire cutting silicon waste material and the crushed and screened waste lithium ion battery graphite anode; (2) high-temperature smelting, ball milling and roasting; and (3) placing in an acid, stirring, leaching, centrifuging, washing, drying and ball-milling to obtain the high-efficiency leaching agent. According to the method, the diamond wire cutting silicon waste and the waste lithium ion battery graphite anode are used as preparation raw materials, silicon carbide is prepared and purified through the processes of ball milling, material mixing, smelting, roasting, acid leaching, centrifuging, drying and the like, and finally high-purity nanoscale silicon carbide particles are obtained. The recycling of the diamond wire cutting silicon waste and the graphite anode of the waste lithium ion battery not only can reduce resource waste and environmental pollution and improve the utilization rate of the waste, but also can generate considerable economic benefits.

The invention provides a method for recovering and modifying a graphite negative electrode material of a failed battery, which comprises the following steps: dispersing a negative electrode piece of the failed battery in water, collecting the graphite negative electrode material separated from a current collector, washing with deionized water for multiple times, and carrying out suction filtration to obtain a recovered graphite negative electrode material; respectively dispersing the recycled graphite negative electrode material, graphene oxide and silicon monoxide in a solvent, mixing the obtained dispersion liquid, and adding a reducing agent for reduction reaction to obtain a precursor composite material; and performing high-temperature carbonization on the precursor composite material to obtain the regenerated graphite negative electrode material. The method combines a recovery process and performance modification of the recovered graphite, is simple to operate and low in energy consumption, and not only can repair the surface of the recovered graphite, but also greatly improves the capacity, rate capability and cycle performance of the recovered graphite by compounding the recovered graphite negative electrode material with the graphene oxide and the silicon monoxide.

The lithium ion battery comprises a positive electrode, a negative electrode and a non-aqueous electrolyte, the negative electrode comprises a negative electrode active material, the negative electrode active material comprises graphite and an amorphous carbon layer coating the surface of the graphite, the thickness of the amorphous carbon layer is X [mu] m, and the non-aqueous electrolyte comprises a first additive, the first additive comprises a compound A with a structure of a chemical formula 1, R1 and R2 are independently selected from hydrogen, a nitrile group, a carbonyl group, a C1-C12 alkyl group, a C2-C12 alkenyl group, a C2-C12 alkynyl group and a C3-C12 cyclic alkyl group, the mass percent of the compound A in the non-aqueous electrolyte is a%, 0.1 < a < 20, and X and a meet the condition that X / a is more than 1 and less than 10. According to the invention, the compound A is introduced into the non-aqueous electrolyte as an additive, and the fast charge cycle performance of the lithium ion battery can be effectively improved by regulating and controlling the relationship between the thickness of the amorphous carbon layer and the content of the compound A. # imgabs0 #

The invention discloses a novel graphite negative electrode material as well as a preparation method and application thereof. The novel graphite negative electrode material comprises a three-dimensional porous material with micropores, mesopores and macropores; wherein the aperture of the novel graphite negative electrode material is between 0.1 nm and 80 nm, the micropore rate is between 30% and 80%, the mesopore rate is between 20% and 50%, and the macropore rate is between 10% and 40%; the total pore volume of the novel graphite negative electrode material is between 0.5 cm < 3 > / g and 8 cm < 3 > / g, and the specific surface area is between 500 m < 2 > / g and 3500 m < 2 > / g; the novel graphite negative electrode material is obtained by carrying out oxidation and high-temperature expansion treatment on graphite to form mesopores and macropores and then forming micropores by using a pore-forming agent; the novel graphite negative electrode material disclosed by the invention is applied to a secondary battery, so that the polarization effect of the battery is effectively reduced, rapid transmission and storage of ions are facilitated, and the specific capacity and rate capability of the battery are effectively improved.

The utility model discloses graphite anode dipping equipment which comprises a base, one side of the base is fixedly connected with a storage pipe, the storage pipe is internally connected with a movable frame in a sliding mode, a plurality of graphite rods are arranged on one side of the movable frame in a penetrating mode, and the inner wall of the storage pipe is provided with a guide mechanism used for guiding the graphite rods in the moving process. A driving mechanism used for driving the moving frame to rotate is arranged on one side of the base. The graphite rod dipping device is provided with the mounting groove, the communicating groove, the arc-shaped groove and the like, the traction rod is driven to rotate by rotating the base, and the sliding block moves in the groove bodies in a plurality of communicating states, so that the moving frame can float up and down while rotating, the graphite rod is driven to move in a floating manner, and the dipping quality and effect of the graphite rod dipping device can be improved.

The invention discloses a hydrogen-fluorine atom doped graphdiyne material and a preparation method thereof, and relates to the technical field of carbon materials. According to the method, halogenated aromatic hydrocarbon and an alkynyl compound are taken as raw materials, a palladium catalyst and a copper catalyst are taken as a catalytic system, and an acetylenic bond of the alkynyl compound and the halogenated aromatic hydrocarbon are subjected to a Sonogashira coupling reaction to obtain the hydrogen-fluorine-doped graphite alkynyl material. The graphdiyne material provided by the invention has a large pore diameter, multiple active sites and high thermal stability and chemical stability, so that the hydrofluorine-doped graphdiyne material has excellent electrochemical energy storage property, shows reversible capacity of 1155mAh g <-1 > under 0.05 Ag <-1 > when being used as a negative electrode of a lithium ion battery, and can be used as a negative electrode of the lithium ion battery. And the density is almost 3 times that of a commercial graphite negative electrode material (300-350mAh g <-1 >). The application of the graphdiyne material in the field of electrochemical energy storage is obviously promoted.

A method for separation, purification and regeneration of spent lithium iron phosphate electrode materials is disclosed, the present disclosure removes the anode material graphite by selective water dissolution and separation of the anode binder, and achieves the leaching of lithium ions in the graphite anode material and serves as a lithium supplement agent; the surface modification and activation of spent lithium iron phosphate cathode materials are performed by high purity oxygen low-temperature plasma ashing technology, while removing organic matter to achieve the dissociation of lithium iron phosphate particles, the surface carbon content of spent lithium iron phosphate electrode materials is effectively controlled to achieve the objective of deep purification and carbon removal, moreover, the internal crystal structure of the electrode material is activated, the migration channel of lithium ion is activated, and the subsequent lithium supplement efficiency is greatly improved.

The invention relates to the technical field of electro-catalytic material synthesis, in particular to a preparation method of a nano TiO2 (at) AC (at) GPs electro-catalytic anode material, which comprises the following steps: firstly, depositing an amorphous carbon layer AC on the surface of graphite flake GPs by adopting a chemical vapor deposition method to obtain an AC (at) GPs composite material; cTAB is dissolved in a methanol / deionized water mixed solution and stirred evenly to obtain a solution A, a titanium sulfate solution is added into the solution A to obtain a precursor solution B, the precursor solution B and the AC (at) GPs composite material are mixed and then subjected to a hydrothermal reaction, after the reaction, a sample is washed, dried and roasted, and the nano TiO2 (at) AC (at) GPs electrocatalytic anode material is obtained. The preparation process is simple and efficient, the obtained nano TiO2 (at) AC (at) GPs electro-catalytic anode material has excellent electro-catalytic activity and cycling stability, the problems that a traditional graphite anode material is poor in electro-catalytic performance and the like are solved, and the nano TiO2 (at) AC (at) GPs electro-catalytic anode material has wide industrial application prospects.

The invention provides a negative electrode material and a preparation method thereof, a negative electrode plate and a lithium ion battery, the negative electrode material comprises graphite, in the cumulative volume particle size distribution of the negative electrode material, the particle size D10 is 3.5 m to 6.0 m, the particle size D50 is 7.5 m to 11.0 m, and the particle size D90 is 16.0 m to 23.5 m; the oil absorption value dbq of the negative electrode material is 28 mL / 100 g to 40 mL / 100 g; the cocaine k of the negative electrode material is greater than or equal to 0.0386 and less than or equal to 0.176, # imgabs0 # and P.D (5T) are compaction densities of the negative electrode material under the pressure of 5T, and the unit is g / cm < 3 >. Based on the negative electrode material provided by the invention, the problems of poor energy density, rate capability and cycle performance of the graphite negative electrode material in the prior art are solved.

The invention discloses a preparation method of a coated graphite negative electrode material. The preparation method comprises the steps of mixing, granulating and coating, graphitizing and the like. Pelleting and coating are carried out before the graphitization process, unstable components in asphalt are decomposed and release small molecules in the asphalt in the hot atmosphere of oxygen, oxidative dehydrogenation is carried out at the same time, oxygen molecules in the oxygen and asphalt molecules are crosslinked to form stable macromolecules in a mode of forming C = O bonds and C-O-C bonds, the asphalt molecules are difficult to graphitize, and the graphitization performance of the asphalt is improved. An ordered structure is not easy to form in the graphitization process, the hard carbon characteristic is achieved, a coating layer formed after coating is of a two-layer structure, the coating layer is composed of a hard carbon outer layer and a hard carbon-graphite transition phase, the binding force between a graphite inner core and the hard carbon coating layer can be improved due to the existence of the hard carbon-graphite transition phase, the hard carbon-graphite composite material is more suitable for high-rate charging and discharging, and meanwhile, the hard carbon-graphite composite material has a good application prospect. And coating and carbonization are not needed after graphitization, so that the preparation time is shortened, the preparation efficiency is improved, the preparation energy consumption is greatly reduced, and the preparation cost is effectively reduced.

The invention relates to the technical field of coating granulation, and discloses a lithium battery graphite negative electrode material coating granulation device which comprises a high-temperature kettle body, one side of the surface of the high-temperature kettle body is communicated with a discharging port for discharging, one side of the high-temperature kettle body is communicated with a feeding port for feeding, and the other side of the high-temperature kettle body is communicated with a discharging port for discharging. A machine shell is fixed to one side of the surface of the high-temperature kettle body, a motor is fixed to an inner cavity of the machine shell, a rotating rod is fixed to an output shaft of the motor, the first transmission mechanism is arranged on one side of the surface of the rotating rod in a transmission mode, and an extrusion mechanism used for extruding asphalt is arranged on one side of the surface of the first transmission mechanism; when graphite and asphalt are wrapped by the high-temperature kettle body, the asphalt conveyed by the auxiliary material conveying mechanism can be pressurized under the action of the first transmission mechanism and the extrusion mechanism, so that the asphalt is sprayed into the high-temperature kettle body and is mixed and wrapped with the graphite. According to the method, uniform distribution of the coating material can be realized, and the coating rate is improved.

The invention relates to the technical field of lithium ion batteries, in particular to a regenerated graphite negative electrode material containing a nitrogen-carbon layer and a preparation method and application thereof.The preparation method comprises the steps that waste graphite powder obtained by conducting microwave pretreatment on waste lithium ion battery negative electrode pieces and a nitrogen-containing organic sugar solution are mixed, and after a reaction, the regenerated graphite negative electrode material containing the nitrogen-carbon layer is obtained; a precursor of the coated graphite negative electrode material is obtained; and carrying out microwave heat treatment on the precursor of the coated graphite negative electrode material to obtain the regenerated graphite negative electrode material containing the nitrogen and carbon layer. In a microwave heat treatment process, graphite is rapidly heated under the action of microwaves, heat is directly conducted to a nitrogen-containing organic sugar coating layer on the surface of a precursor, in-situ carbonization of the nitrogen-containing organic sugar coating layer is rapidly and uniformly realized to form a nitrogen-containing carbon layer, and existence of nitrogen atoms on the surface of regenerated graphite reduces the adsorption energy of a negative electrode to Li < + > and promotes migration of Li < + >; and the nitrogen-containing carbon layer can effectively repair the surface defects and damage of the waste graphite, so that good rate capability is embodied.

The present disclosure belongs to the technical field of battery materials, and discloses a silicon / carbon composite anode material, and a preparation method and use thereof. The preparation method includes the following steps: S1. dissolving a graphite anode powder in an acid solution, and conducting solid-liquid separation (SLS) to obtain a precipitate; and washing and drying the precipitate, adding a reducing agent, and subjecting a resulting mixture to heat treatment to obtain a purified graphite material; and S2. mixing a modified silicon powder with the graphite material, adding a resulting mixture to a polyimide (PI)-containing N,N-dimethylformamide (DMF) solution, and stirring; and subjecting a resulting mixture to distillation and then to carbonization to obtain the silicon / carbon composite anode material.

The sealing structure of the present invention and the continuous reaction treatment equipment for graphite-based anode materials / phosphates and ternary cathode materials of lithium-ion batteries. The sealing structure includes sealing devices arranged at each main air leakage point of the rotary reactor. The sealing device includes a first solid sealing group, a gas sealing group, and a second solid sealing group arranged circumferentially along the rotary reactor. The first solid sealing group, the gas sealing group, and the second solid sealing group are arranged in sequence in the axial direction at the air leakage point and form an axial seal with each other. The coating carbonization / sintering equipment includes a feeding mechanism, a rotary reactor, and a discharging mechanism. The feeding mechanism and the discharging mechanism are docked at the corresponding feeding end and discharging end of the rotary reactor, and the above-mentioned sealing structure is provided at the docking positions of the rotary reactor with the feeding mechanism and the discharging mechanism. This equipment has the advantages of simple and reliable structure and good sealing performance.

The application provides a graphite ladle production powder intelligent weighing and compensation control method, relates to the graphite product production control technical field, and comprises the following steps: obtaining target formula parameters, raw material state data and discharging process data corresponding to each powder raw material in a graphite ladle blank batching weighing process, the graphite ladle production powder intelligent weighing and compensation control method, by obtaining the target formula parameters, raw material state data and discharging process data corresponding to each powder raw material, generating a weighing compensation collaborative control index, forming self-adaptive weighing control parameters and self-adaptive compensation control parameters matched with each powder raw material, realizing the collaborative identification and self-adaptive regulation and control of the discharging behavior, deviation formation mechanism and compensation demand in the graphite ladle blank batching weighing process, and improving the control precision, process stability and control adaptability of the powder weighing process.

The invention provides a graphite negative electrode material, a preparation method thereof and an electrochemical device. The preparation method comprises the following steps: (1) pretreating a coke material to obtain aggregate with D50 of 4-9 [mu] m, and the tap density of the aggregate is greater than or equal to 0.5 g / cm < 3 >; (2) mixing the aggregate and the liquid asphalt to obtain a mixed and kneaded material, and performing granulation treatment on the mixed and kneaded material to obtain a granulation product; and (3) carrying out graphitization treatment and carbon coating on the granulation product to obtain the graphite negative electrode material. Through cooperation of the small-particle-size aggregate, the liquid asphalt and carbon coating, the disadvantages of poor morphology, low compaction, low compaction and too low capacity of the traditional small-particle-size aggregate are broken through, and the rapid charging performance is effectively improved; and the method is more suitable for a fast-charging electrochemical device.

The application provides a method for promoting selective reduction of Fe3O4 in copper slag by carbon-containing anode through electrochemistry, which comprises the following steps: weighing a certain amount of dry and finely ground copper slag and placing the copper slag in a crucible, transferring the crucible with the copper slag into a leaner electric furnace, and heating the copper slag to a specific reaction temperature at a speed of 10 DEG C / min to obtain molten copper slag; then inserting a pretreated graphite anode and an inert high-melting point metal cathode, and inputting a certain voltage to perform electrochemical regulation; after power-off, the sample is placed for a period of time, and the sample is cooled to room temperature with the furnace; and the obtained sample has copper matte in the lower layer and molten slag tailings in the upper layer. The application uses a carbon-containing anode to replace coal powder in combination with electrochemical regulation, which can not only make the carbon-containing anode penetrate into the interior of the copper slag and increase the reducible depth of the molten slag, but also ensure the continuous work of the carbon-containing anode by the intervention of the electrochemical method, thereby solving the problem of low utilization rate of coal powder in the reduction of copper slag in industry.

The invention discloses a production device and method for a graphite negative electrode material of a new energy lithium battery, and relates to the field of graphite negative electrode material production device.The production device for the graphite negative electrode material of the new energy lithium battery comprises a supporting frame, and the inner wall of the supporting frame is fixedly connected with a charging barrel; a lifting plate is fixedly connected to the upper surface of the charging barrel, a first motor is fixedly connected to the upper surface of the lifting plate, supporting seats are installed on the two sides of the supporting frame, rotating rollers are rotationally connected to the surfaces of the supporting seats, the surfaces of the pair of rotating rollers are sleeved with a conveying belt, and a plurality of discharging discs are fixedly connected to the surface of the conveying belt. When the discharging disc located on the conveying belt rotates to the lower portion, the ejector rod makes contact with the surface of the inclined plate to push the push plate to move, the push plate pushes materials in the discharging disc out for stripping, then the push plate is driven to reset through the spring, and the problem that stripping cannot be well achieved after shaping is avoided.

The application provides a method for treating organic phosphorus in tanning wastewater by electrocatalytic ozone treatment with a modified foam iron electrode as a cathode, and the method comprises at least one pair of electrodes; the electrodes comprise a modified foam iron cathode and a modified graphite felt anode, the modified foam iron cathode is modified 40ppi foam iron; the method for treating organic phosphorus in tanning wastewater is as follows: the modified foam iron cathode and the modified graphite felt anode are placed in a reactor, the cathode and the anode are connected to a direct current power supply; the wastewater containing tetramethylphosphonium sulfate to be treated is added into the reactor, and the pH value of the wastewater is controlled in the range of 5-9; the mixed gas of ozone and oxygen is continuously introduced into the reactor, and the flow rate of the mixed gas of ozone and oxygen is controlled to be 0.1-0.5L / min per liter of wastewater; the direct current power supply is started to supply power to the graphite anode and the modified foam iron cathode, and the tetramethylphosphonium sulfate in the wastewater is continuously oxidized into orthophosphate salt between the electrodes; the crystallized orthophosphate salt is separated from the wastewater, and the organic phosphorus component in the tanning wastewater is removed.

The utility model provides a coating device for a graphite cathode material. The device comprises a fluidization unit and a stirring unit which are communicated with each other, the fluidization unit is arranged above the stirring unit; the fluidization unit comprises a fluidization cabin, a liquid inlet pipeline and a fluidizer; a first feeding hole and a first discharging hole are respectively formed in the top and the bottom of the fluidization cabin; the liquid inlet pipeline is arranged at the upper part in the fluidization cabin along the radial direction of the fluidization cabin; a plurality of atomizers with downward nozzles are arranged on the liquid inlet pipeline; the fluidizer is arranged at the lower part in the fluidization cabin along the radial direction of the fluidization cabin; a plurality of upward air outlets are formed in the fluidizer; the stirring unit comprises a coating kettle provided with a stirring element, a second feeding hole is formed in the top of the coating kettle, and the second feeding hole is connected with the first discharging hole. According to the coating device, the coating effect of the negative electrode material under the condition of low coating amount can be improved, so that the coating of the negative electrode material is more uniform; according to the coating device, the powder and the liquid-phase coating agent are mixed in a fluid form, and the treatment process is faster and more efficient.