2125results about How to "Short process" patented technology

The invention relates to a high-strength complex-phase hot-rolled wire rod for a 2100MPa bridge cable and a manufacturing method of the high-strength complex-phase hot-rolled wire rod, and the manufacturing method comprises the following steps: rolling and spinning C-Si-Mn-Cr-Mo chemical components into a wire rod, and carrying out online molten salt tail end quenching isothermal treatment, so that the wire rod firstly passes through front-section molten salt and is cooled at a cooling speed of more than or equal to 35 DEG C / s to enter a sorbite phase region from an austenite state; the method comprises the following steps of: controlling part of austenite to be converted into sorbite, cooling to a bainite phase through rear-section molten salt, carrying out end quenching, controlling bainite phase change, carrying out isothermal tempering to remove stress, and finally carrying out roller way slow cooling to prepare a complex-phase structure comprising tempered sorbite and tempered bainite, so that abnormal structures of network carbides and martensite can be effectively controlled; the high-strength composite phase structure control and plasticity matching are achieved, the tensile strength is 1530-1560 MPa, the percentage reduction of area is 30%-35%, and the method is suitable for manufacturing 2100 MPa-grade ultrahigh-strength bridge cables with large drawing amount and beneficial to reducing the risk of wire breakage.

The invention discloses a solid-state battery cell manufacturing method and device based on single-sided rubber frame forming, and relates to the technical field of solid-state battery manufacturing. The method comprises the following steps: manufacturing a rubber frame on one surface of a first pole piece positioned at a forming station; the second pole pieces and the first pole pieces with the rubber frames are sequentially and alternately conveyed to a lamination station, and the first pole pieces and the second pole pieces are sequentially and alternately laminated, so that the second pole pieces are embedded into the rubber frames of the first pole pieces; wherein the electrodes of the first pole piece and the second pole piece are opposite, and the thickness of the rubber frame is greater than or equal to that of the second pole piece. According to the invention, two times of rubber frame forming on one pole piece are not needed, so that the connectivity between the pole pieces is improved, and the conditions that the solid electrolyte layer and the pole pieces deviate relatively and the two adjacent pole pieces are short-circuited are avoided.

A purification method for purification and impurity removal of metal rubidium and cesium performs purification and impurity removal treatment on metal rubidium and cesium through external introduction of elements, and specifically comprises the following process steps and conditions: (1) firstly, putting metal lead particles into a porous and liftable stainless steel mesh; secondly, transferring a penicillin bottle in which the primary metal rubidium / cesium liquid is sealed in a vacuum manner into a glove box protected by argon, opening a penicillin bottle cap to transfer the primary metal rubidium / cesium liquid into a reaction tank, and then putting the reaction tank and a stainless steel mesh into a well type resistance vacuum furnace together to finish charging operation; and (2) heating the reaction tank after the charging operation by using a resistance heater, raising the temperature of the furnace to 50-320 DEG C, keeping the temperature for 2-10 hours, and then carrying out solid-liquid separation to obtain the high-purity metal rubidium / cesium, so that Li / Na impurities can be effectively removed, a high-purity metal rubidium / cesium product is prepared, and the production cost is reduced. And the method has the advantages of short process flow, low energy consumption, low reaction temperature, simplicity and convenience in equipment operation, lower manufacturing cost, variable specification, investment saving, environmental pollution reduction, raw material cost reduction and the like.

The invention relates to the technical field of solid waste treatment, in particular to a phosphogypsum source harmless treatment method. Washing the tail section of the crystal growing slurry filtering system with clean water, and obtaining phosphogypsum after washing, wherein the ratio of the water consumption of the clean water to the phosphogypsum is (1: 10)-(1: 1) cubic / ton; performing size mixing on filter cloth washing water in a crystal growing slurry filtering system and the obtained ardealite to obtain ardealite slurry with the concentration of 20wt%-60wt%; adding a harmless treatment agent A into the obtained ardealite slurry, uniformly stirring and mixing, and reacting for 5-60 minutes to obtain first-stage reaction slurry; adding a harmless agent B into the obtained first-stage reaction slurry, uniformly stirring and mixing, reacting for 20-60 minutes, and filtering to obtain filtrate and harmless ardealite. The comprehensive recovery rate of fluorine and phosphorus valuable components in the wet-process phosphoric acid industry is realized through simple process improvement, and the pollutant content of the phosphogypsum after washing and filtering is reduced; according to the phosphogypsum harmless treatment method, the idea that industrial solid waste is used for treating pollution with waste is utilized, the agent preparation raw materials are wide in source and low in cost, and the agent is a toxic representative for solid waste pollution prevention and control cooperative control and assistant pollution reduction and carbon reduction synergistic interaction.

The invention belongs to the technical field of solid-state electrolytes, and particularly discloses a modified PEO-based composite solid-state electrolyte, a preparation method thereof and a solid-state battery. The modified PEO-based composite solid electrolyte comprises the following components: lithium-doped indium gallium phosphate, PEO and a lithium-based electrolyte, wherein the chemical formula of the lithium-doped indium gallium phosphate is InxGa (1-x) PO4: Li, and x is more than or equal to 0.3 and less than or equal to 0.8. The indium gallium phosphate has an amorphous structure and shows excellent lithium ion transmission performance and conductivity; after lithium ions are further embedded into the indium gallium phosphate with the amorphous structure, the lithium ion conductivity of the indium gallium phosphate can be further improved, and more active sites are provided for transmission of the lithium ions; the lithium-doped indium gallium phosphate is added into the PEO-based solid electrolyte as an inorganic filler, so that the mechanical strength, the ion transmission capability and the conductivity of the PEO-based solid electrolyte can be effectively improved.

The invention provides a preparation method of an acid-resistant and chlorine-corrosion-resistant porous composite electrode and a device constructed on the basis of the electrode and used for preparing hydrogen and chlorine by electrolyzing a sodium chloride solution, two cavities are provided, an acid or neutral saturated sodium chloride solution is filled in the cavities, the cavities are separated by a proton exchange membrane or a diaphragm, and the proton exchange membrane or the diaphragm is filled in the cavities. And in the electrolysis process, the cathode generates high-purity hydrogen, the anode generates high-purity chlorine, the chlorine is absorbed by sodium hydroxide in the gas collection bottle and generates sodium hypochlorite, or the chlorine is introduced into a sodium bromide / sodium iodide solution to replace bromine / iodine elementary substances, and the chlorine is discharged from the gas collection bottle. The sodium hypochlorite solution and the bromine / iodine water are used for disinfection and sterilization experiments. The corrosion-resistant porous composite electrode for electrolysis of an acidic or neutral saturated sodium chloride solution is prepared, the electrolysis voltage of the corrosion-resistant porous composite electrode is further reduced by loading a cathode / anode catalyst, and an acidic or neutral saturated sodium chloride solution electrolysis device constructed based on the electrode can be used for preparing high-purity hydrogen and chlorine.

The invention discloses a method for preparing a composite iron-based polyanion positive electrode material. The structural formula of the positive electrode material is represented as Na4Fe3 (PO4) 2 (P2O7) (at) Camp, mXenes are sodium ferric pyrophosphate compositely coated by an MXenes material and a carbonaceous precursor, and the preparation method comprises the following steps: weighing a sodium source, a ferrous source, a phosphorus source and a carbon source according to a stoichiometric ratio, uniformly mixing, grinding, spray-drying and sintering at high temperature to obtain the composite iron-based polyanion positive electrode material, and the carbon source comprises iron-nickel doped polyethylene glycol. The composite iron-based polyanion positive electrode material provided by the invention is remarkably improved in the aspects of energy density, rate capability and cycle life, and the preparation process is simple to operate, reliable in flow, quick in preparation process and easy for industrial production, so that an ideal scheme is provided for commercialized sodium ion battery positive electrode materials.

The invention discloses a bus bar for a full-screen assembly and a manufacturing method of the bus bar. The bus bar is characterized by comprising a conductive substrate and an insulating rubber strip, a hollow structure is arranged on the insulating rubber strip; the conductive substrate is arranged on the insulating rubber strip; and the hollow structure is covered by the conductive substrate. By improving the bus bar structure and the manufacturing and application process thereof, the improved bus bar is arranged on the back surface of the battery piece to be processed, so that the light receiving area of the module is not occupied, the full laying rate of the battery piece is improved, and the power generation power of the module is further improved; original reserved bus bar interval areas in the middle and on the periphery of the assembly are canceled, so that the whole assembly does not have a blank area any more, and the overall attractiveness is high; meanwhile, the improved bus bar is welded in the assembly lamination process, a bus bar welding process is not needed, the equipment investment can be saved, the technological process can be shortened, and the production cost can be reduced.

The invention discloses a method for extracting valuable metals from black powder of waste lithium ion batteries, and belongs to the technical field of recycling of waste lithium ion batteries. According to the method, valuable metals are extracted from the waste lithium ion battery black powder by adopting low-temperature roasting and water leaching, the waste lithium ion battery black powder is taken as a raw material, sulfamic acid is taken as a roasting agent, the waste lithium ion battery is pretreated, and roasting for carbon removal, metal extraction and water leaching are performed in sequence, so that the valuable metals are obtained. And leaching liquid and leaching residues containing two or more elements of lithium, nickel, cobalt, manganese, iron and aluminum are obtained and are used for further purification and recovery of valuable metals. According to the method provided by the invention, the influence of aluminum dissolution on recovery of other metals is reduced, the use of hydrogen peroxide is avoided, the process flow is shortened, the process cost is greatly reduced, the roasting and water leaching processes cannot corrode equipment, and the whole process cannot generate waste acid to cause secondary pollution.

The invention discloses a method for directly repairing and regenerating a ternary positive electrode recycled material. The method comprises the following steps: S1, disassembling a ternary retired battery; s2, sintering to remove impurities; s3, removing powder and sieving; s4, mixing with crystalline lithium salt; s5, crushing and sieving after sintering and cooling; s6, mixing with a metal oxide; and S7, sintering, cooling, removing iron, and sieving. The eutectic lithium salt is used as a lithium source for lithium supplement, so that the diffusion rate of lithium ions can be increased, the concentration of the lithium ions can be improved, the reaction temperature of lithium supplement recovery can be reduced, and the energy consumption can be reduced. The ternary lithium battery is wrapped by the metal oxide, residual lithium on the surface of the material can be utilized, a layer of fast ion conductor can be formed on the surface of the material in situ, and the residual lithium on the washed surface is removed, so that the process is shortened, the cost is reduced, the transmission rate of lithium ions can be further improved, and the rate capability of the battery is improved. And the fast ion conductor structure can isolate the contact between the electrolyte and the positive electrode material, so that side reaction is reduced, and the cycle performance is improved.

The invention provides a preparation method of a silicon substrate and a heterojunction solar cell, and the preparation method of the silicon substrate comprises the steps: an initial silicon substrate comprises a first surface and a second surface, a first mask layer is formed on the first surface, and a second mask layer is formed on the second surface; performing first dot matrix laser etching treatment on the first mask layer to form a first intermediate mask layer; the second surface is provided with a target area, the target area is used for arranging a grid line, and second dot matrix laser etching processing is carried out on the second mask layer corresponding to the target area to form a second middle mask layer; performing alkali etching treatment on the first surface through the first intermediate mask layer, and performing alkali etching treatment on the target area through the second intermediate mask layer; and removing the first intermediate mask layer to obtain a first suede, and removing the second intermediate mask layer to obtain the silicon substrate with the target area as the second suede. The silicon substrate with excellent adhesiveness between the second surface and the grid lines and ultralow reflectivity on the first surface is prepared by using the method.

The invention relates to the technical field of wastewater treatment, in particular to a synchronous treatment method and device for fluorine and silicon in wastewater, the fluorine and silicon wastewater treatment device comprises an outer cylinder and an inner cylinder, the inner cylinder is suspended in the outer cylinder, and an inner circulation passage is formed between the inner cylinder and the outer cylinder; a waste water feeding pipe and a crystal inducing agent feeding pipe are respectively arranged at the lower part of the outer barrel, outlets of the waste water feeding pipe and the crystal inducing agent feeding pipe are positioned below a lower barrel opening of the inner barrel, a water outlet pipe is arranged at the upper part of the outer barrel, and a return pipe is arranged between the water outlet pipe and the waste water feeding pipe; a granulation body discharge pipe is arranged at the bottom of the outer cylinder. Compared with the prior art, the purpose of efficiently and synchronously removing fluorine and silicon in the wastewater is achieved in the single-stage reactor by utilizing the modified composite seed crystal, designing the reflux of the recycled water and controlling the reflux ratio, the dosage of reagents is small, the process is short, the energy consumption is low, the formed granules are low in water content and high in solid-liquid separation efficiency, and the method is suitable for industrial production. Secondary treatment is not needed, and industrial application is facilitated.

The invention belongs to the technical field of electric furnace steelmaking, and relates to a smelting system and method for ultralow-carbon-nitrogen molten steel, and the method comprises the following steps: step 1, placing a solid raw material in an electric furnace, then lowering an electrode for smelting, and treating the molten steel until the carbon content is less than or equal to 0.03% and the oxygen content is more than or equal to 600ppm through a waste steel melting stage, an oxidation decarburization stage and a dynamic decarburization stage in sequence; the molten steel temperature is greater than or equal to 1650 DEG C; and 2, the molten steel is tapped into a steel ladle, after tapping is finished, the molten steel is transferred into an RH vacuum refining device through the steel ladle to be subjected to deep decarburization and nitrogen removal treatment, and the ultralow-carbon-nitrogen molten steel with the carbon content smaller than or equal to 0.003% and the nitrogen content smaller than or equal to 0.003% is obtained. The method can stably control the content of carbon and nitrogen in the molten steel at a low level, and is beneficial to production of high-grade ultralow-carbon-nitrogen steel; and molten iron is not added in the electric furnace smelting process, so that carbon emission is reduced, and production and application of low-carbon green steel products such as high-grade thin plates are promoted.

The invention discloses a plasma spraying preparation method for a micro-nano double-layer PTFE coating on the surface of a flexible shaft steel wire, and particularly relates to the technical field of functional materials.The plasma spraying preparation method comprises the following steps that 1, a mandrel and a steel wire are installed on twisting equipment, and an inductive coupling plasma torch tube is installed on a driving guide rail parallel to the mandrel; 2, the pickling solution serves as a raw material, the pickling solution is atomized into micro-droplets through a feeding system and an air supply system, the micro-droplets are rapidly sprayed out of the torch pipe, and pickling spray is formed; 3, the twisting equipment is started, the steel wire is twisted around the mandrel, meanwhile, the driving guide rail is started, the twisted steel wire is subjected to acid pickling treatment through acid pickling spray sprayed out of the torch pipe, and the surface of the steel wire is roughened; 4, feeding of the pickling solution is stopped, high-flow gas is introduced into the torch pipe through the gas supply system to form high-speed gas flow, and the residual pickling solution on the surface of the flexible shaft is blow-dried; and 5, starting an inductively coupled plasma spraying system, injecting the PTFE emulsion serving as a raw material into plasma flame flow, driving a guide rail to move to enable the plasma flame flow to scan the steel wire on the surface of the flexible shaft, and depositing a PTFE coating on the surface of the steel wire. According to the method disclosed by the invention, the double-layered PTFE coating is deposited on the surface of the steel wire by using an inductive coupling plasma spraying process for the first time in the flexible shaft steel wire twisting process, so that one-step rapid preparation of the anti-corrosion coating is realized.

The invention discloses a short-process preparation method and application of a vanadyl sulfate electrolyte based on vanadium slag valence regulation and control, and belongs to the technical field of vanadium electrolytes. The method comprises the following steps: leaching the vanadium slag by using sulfuric acid to obtain a leaching solution containing low-valence vanadium; extracting vanadium and chromium in the leachate by adopting an amine organic extraction agent; carrying out reverse extraction by using sulfuric acid; the method comprises the following steps of: firstly, extracting and separating vanadium by using a phosphoric acid extracting agent, and finally, carrying out reverse extraction by using sulfuric acid to obtain the vanadium electrolyte which can be used for constructing a VFB-5kW / 10kWh vanadium battery energy storage system. The traditional established thinking that pentavalent vanadium is extracted through vanadium slag oxidation to serve as a vanadium source to prepare the vanadium electrolyte is broken through, the novel technology for extracting the low-valence vanadium solution from the vanadium slag to directly prepare the vanadium electrolyte is provided, the short-process and green novel technology for preparing the vanadium electrolyte from the vanadium slag is constructed, the efficiency of the vanadium electrolyte preparation technology is improved, and the preparation cost is reduced.

The invention discloses a step type mine quarrying face in-situ ore moving type head section treatment process which comprises the steps that a crawler belt impact type roller crusher is arranged on a mine quarrying face in situ, and the crawler belt impact type roller crusher receives, conveys and crushes in-situ ore mined on the mine quarrying face; each crawler belt moving belt conveyor comprises a movable crawler belt driving base and a conveying belt conveyor body arranged on the crawler belt driving base, and the crawler belt moving belt conveyors are connected end to end to convey materials; the mine quarrying working face comprises a top quarrying working face arranged on the mountain top and a stepped in-mountain quarrying working face arranged on the lower portion of the mountain top. By means of the mountain height difference, the crawler belt moves the belt conveyor, so that conveyed materials roll down from a mine quarrying face towards the mountain or are directly conveyed to the downhill through the long-distance belt conveyor. According to the invention, head section crushing work and quarrying work are combined, intermediate transportation links are reduced, energy consumption is saved, cost is reduced, and flexibility and efficiency are high.

The invention discloses a surface passivating inert metal, a plating solution thereof and a passivating method, and belongs to the technical field of inert metal surface treatment. The plating solution comprises sulfydryl silane, amino silane, acid, deionized water and absolute ethyl alcohol. And the inert metal subjected to surface pretreatment is put into a plating solution to be subjected to electrolytic treatment and dipping treatment correspondingly, and then the inert metal with the silane composite passive film on the surface is obtained through stepped curing treatment. The plating solution is simple in component, stable in system and low in price; the preparation method of the plating solution is simple and easy to operate; the passivating treatment method is short in technological process and high in preparation efficiency; the prepared silane composite passivation film is uniform and compact in structure, colorless and transparent, can keep good gloss of the inert metal surface, and has excellent properties such as oxidation resistance, corrosion resistance and insulation.

The invention belongs to the technical field of steel continuous casting, and particularly relates to a 300-series stainless steel thin strip and a continuous casting preparation method thereof. The stainless steel thin strip comprises the following components in percentage by mass: 0.01-0.05% of C; 0.30% to 0.60% of Si; 16.0% to 18.5% of Cr; 0.8 to 1.6 percent of Mn; 6.0 to 12.0 percent of Ni; 0.01 to 0.05 percent of N; 0.2%-3.5% of Cu; the steel comprises the following components in percentage by weight: less than or equal to 0.005% of S, less than or equal to 0.020% of P, less than or equal to 50ppm of B, less than or equal to 100ppm of Ce and the balance of The preparation method comprises the following steps: smelting, casting, hot rolling, water cooling, coiling to obtain a hot-rolled thin strip, and carrying out heat preservation and water quenching on the hot-rolled thin strip to obtain a finished product 300 series stainless steel thin strip. By adopting the optimized crystallization roller, the high-quality thin strip with the tensile strength of 900-1110 MPa, the yield strength of 670-780 MPa, the percentage elongation after fracture of 45%-65%, no cracks and wrinkles on the surface and the thickness of about 0.6 mm is obtained. The composition is reasonable in design, the preparation process is simple and controllable, and the obtained product is excellent in performance and convenient for industrial application.

The invention discloses a preparation method of a low-cost high-performance TiAl alloy engine blade, relates to the technical field of TiAl alloy preparation, and provides a method for preparing the TiAl alloy blade by combining precision casting and vacuum isothermal forging. The process route comprises the steps of prefabricated blank smelting and precision casting, annealing heat treatment, vacuum isothermal forging of a blade final forging piece, heat treatment and blade machining, and compared with a cast blade, the mechanical property is remarkably improved, and the yield is also remarkably increased; compared with a traditional forged blade, the manufacturing cost is greatly reduced due to the fact that the process is greatly shortened; compared with ingot casting / rod casting and high-temperature forging, the method has the advantages that the material utilization rate and the mechanical property are improved, and the manufacturing cost can be reduced; in addition, compared with forging under the atmospheric condition, the problem of severe oxidation does not exist, and the material utilization rate and the mechanical property are obviously improved. Therefore, the method provided by the invention has important commercial value.

The invention discloses a preparation method of a nanoscale lithium aluminum titanium phosphate solid electrolyte, which comprises the following steps: mixing a phosphorus source and a titanium source by using a liquid phase method to react, obtaining a precursor 1 after the reaction is completed under the conditions that the reaction temperature is 25-180 DEG C and the pH value of a reaction system is 0-2, then adding a lithium source and an aluminum source, and preparing a precursor 2 by using a liquid phase reaction, and finally, washing and drying, and carrying out heat treatment to prepare the nano-scale lithium aluminum titanium phosphate solid electrolyte. According to the method, the reaction temperature and the pH value of a reaction system in the process of preparing the precursor 1 are controlled, so that the particle size level of the product is controlled, the introduction of a rear-end crushing process is avoided, the technological process is shortened, and the production period is shortened.

A parallel type water-cooling heat dissipation structure of battery pieces comprises a water-cooling bottom plate and at least two water-cooling vertical plates, the at least two water-cooling vertical plates are arranged on the water-cooling bottom plate, and the adjacent water-cooling vertical plates are arranged at intervals to form mounting positions used for mounting the battery pieces. A water inlet flow channel and a water outlet flow channel which are separated from each other are arranged in the water-cooling bottom plate, heat dissipation flow channels are arranged in the water-cooling vertical plates, the water inlet flow channel is communicated with a water inlet of the heat dissipation flow channel in each water-cooling vertical plate, and the water outlet flow channel is communicated with a water outlet of the heat dissipation flow channel in each water-cooling vertical plate. According to the structure, the flow path of water flow can be reduced, and the loss of flow velocity, flow and cooling performance caused in the circulation process of cooling water is reduced, so that the heat dissipation balance of the battery piece is improved.

The invention discloses a method for preparing high-quality iron phosphate in a short process, and belongs to the field of battery material manufacturing. The method comprises the following steps: dissolving iron powder with phosphoric acid to prepare a ferrous phosphate solution, then transferring the solution into a pressurized reaction kettle, blowing high-speed oxygen to oxidize ferrous phosphate into ferric phosphate, adding ammonia water to control the pH value to be 1.5-2.0, and carrying out solid-liquid separation to obtain the water-containing amorphous ferric phosphate, after washing is finished, a water-containing material is fed into a muffle furnace to be subjected to stepped calcination, dehydration and crystal transformation are completed, and the alpha monoclinic system iron phosphate is obtained. The method provided by the invention is short in process flow and low in energy consumption, the oxidant is easy to obtain and safe, the particle size uniformity of reaction materials is good, and the prepared iron phosphate is uniform in particle size, regular in structure and stable in iron-phosphorus ratio and is a high-quality precursor material.

The invention discloses a preparation method of a composite sound-absorbing material for a motor home, and relates to the technical field of sound-absorbing materials, the preparation method comprises the following steps: S1, preparing a functional polymer; step S2, modifying the graphene sponge; step S3, preparation of functional fibers; step S4, surface modification; and S5, preparing the composite sound-absorbing material. The composite sound-absorbing material is good in weather resistance and mechanical property and remarkable in sound-absorbing effect.

The invention discloses a beneficiation method for comprehensive recovery of lithium beryllium resources in fluorite tailings, and belongs to the technical field of beneficiation. According to the method, according to the surface characteristic difference of fluorite associated lithium beryllium minerals, firstly, a metal organic complex and fatty acid are adopted as fluorite and beryllium mineral co-enrichment composite collecting agents, fluorite and beryllium minerals are floated preferentially, and then fluorite and beryllium concentrates are further floated and separated through the beryllium mineral inhibition principle; and the bulk flotation tailings are activated by high-valence metal ions and then subjected to lithium flotation, and lithium concentrate is obtained. By means of the method, qualified metallurgical-grade fluorite and lepidolite concentrate with the Li2O grade being 1.2% can be obtained, the CaF2 recovery rate of 55% or above and the Li2O recovery rate of 65% or above can be achieved, meanwhile, beryllium concentrate with the BeO grade being 2.0% and the recovery rate being 40% can be produced, deep comprehensive recovery of fluorite and associated lithium beryllium resources in fluorite tailings is effectively achieved, and the method is suitable for industrial production. And the method has good social value and economic benefit.

The invention provides an Mxene-iron molybdenum bimetallic sulfide and carbon composite material as well as a preparation method and application thereof, belongs to the technical field of sodium ion batteries, and is used for solving the technical problems of poor conductivity and rate capability of a metal sulfide negative electrode material. The preparation method of the Mxene-iron-molybdenum bimetallic sulfide and carbon composite material comprises the following steps: dissolving an iron source, a molybdenum source and a carbon source in a solvent to prepare a mixed solution; then carrying out a hydrothermal reaction to prepare a bimetallic oxide nanosphere; the bimetallic oxide nanospheres are subjected to high-temperature vulcanization treatment, and iron-molybdenum bimetallic sulfide carbon is prepared; the preparation method comprises the following steps: mixing Mxene and iron-molybdenum bimetallic sulfide and carbon through ball milling to prepare the Mxene-iron-molybdenum bimetallic sulfide and carbon composite material. The composite material disclosed by the invention can realize efficient electron transmission and provide more active sites, and is beneficial to the electrochemical reaction of the battery; the mechanical stability of the material can be enhanced, the volume expansion in the charging and discharging process is effectively reduced, the particle diffusion path between positive and negative electrodes is shortened, and the reaction kinetics of the electrode is improved; and the conductivity and the rate capability of the material can be effectively improved, so that the comprehensive performance of the sodium-ion battery is improved.

The invention discloses a method for synthesizing ferric phosphate pyrophosphate and preparing a sodium ferric phosphate pyrophosphate positive electrode material. The method comprises the following steps: S1, preparing a raw material solution; s2, adding the ferric salt solution, the phosphate radical solution and the pyrophosphate radical solution into the reaction base solution, controlling the pH value, and carrying out coprecipitation reaction; s3, filtering and washing, adding water, and pulping again; s4, heating and crystallizing; s5, filtering and drying; s6, sintering to obtain ferric pyrophosphate Fe6 (PO4) 2 (P2O7) 3; s7, adding ferric pyrophosphate, a sodium source and a carbon source into water, pulping, and sanding; s8, spray drying; and S9, sintering is carried out, such that Na4Fe3 (PO4) 2 (P2O7) / C is obtained. According to the method, a precursor Fe6 (PO4) 2 (P2O7) 3 is synthesized firstly, long-range ordered mixing of Fe and P elements on the atomic scale is achieved, the morphology and particle size of the precursor are controllable, the problem of generation of inactive impure-phase NaFePO4 in the synthesis process of ferric sodium pyrophosphate can be effectively solved, the raw material utilization rate is high, and the synthesized positive electrode material is large in tap density and compaction density and excellent in electrochemical performance.

The invention relates to the field of chemical industry, and discloses a method for preparing high-purity vanadium oxide by purifying ammonium vanadate, which comprises the following steps: adding a carbonate solution into ammonium vanadate, stirring, and heating to 75-95 DEG C to obtain a vanadium-containing return solution; keeping the temperature of the vanadium-containing return solution, and adding a calcium salt impurity removal agent to obtain a vanadium-containing purified solution and first-stage impurity removal slag; oxalate is added into the vanadium-containing purified liquid, the temperature of the vanadium liquid is kept, and deeply-purified vanadium liquid and second-stage impurity removal slag are obtained; cooling the deeply purified vanadium liquid to 5-35 DEG C, stirring and reacting, and then carrying out solid-liquid separation to obtain ammonium metavanadate and secondary vanadium precipitation supernatant; adding pure water into the ammonium metavanadate product, pulping, stirring, and heating to 80-95 DEG C to obtain a secondary return solution; the pH of the secondary return solution is adjusted to 1.6-2.0, the temperature is raised to 95-98 DEG C, and ammonium polyvanadate and a third-section vanadium precipitation supernatant are obtained; and drying the ammonium polyvanadate, raising the temperature to 500-600 DEG C in an oxidizing atmosphere, and carrying out heat preservation and calcination to obtain a vanadium pentoxide product. The method can be used for preparing a high-purity vanadium pentoxide product.

The invention discloses a method for preparing a container aluminum foil with a high recycled aluminum content. The components of the aluminum foil are: Si: 0.2-0.60%, Fe: 1.20-1.60%, Cu: 0.01-0.05%, Mn: 0.4-0.8%, Mg: 0.01-0.05%, Zn: 0.01-0.05%, Ti: 0.015-0.035%, and the balance is Al; the process flow is: smelting-continuous casting and rolling-cold rolling-finished product annealing; the invention makes continuous casting and rolling The proportion of recycled aluminum waste used in the rolling process has increased from 10%-20% to 60%-80%. The energy consumption of the industrial chain has been reduced, pollutant emissions have been reduced, the amount of alloying agents added has been reduced, production costs have been reduced, and the green production effect has been more obvious. The process flow has been greatly shortened, energy consumption has been reduced, pollutant emissions have been reduced, and green production has been implemented. The thickness of the container foil produced is 0.125-0.16mm, the O-state tensile strength is 110-140Mpa, the elongation is ≥30%, and the cupping value is ≥9mm.

The invention discloses a process for treating rural domestic sewage by using an improved A2 / O + MBBR (Moving Bed Biofilm Reactor), and relates to the technical field of sewage treatment. The method comprises the steps of S1, initial-stage treatment, S2, reflux treatment and S3, tail-stage treatment. The rural domestic sewage is treated by an improved A2 / O + MBBR nitrogen and phosphorus removal process, and the rural domestic sewage is distributed into each tank by adopting a sectional water inlet technology, so that an alternate multi-stage facultative / aerobic environment is formed, and the biological nitrogen and phosphorus removal effect is enhanced; the improved A2 / O + MBBR process has the advantages of high nitrogen and phosphorus removal effect, low investment and operation cost, convenience in operation and management and the like; all returned sludge enters the pre-denitration tank and enters the front-section anaerobic tank and the front-section anoxic tank, a sludge concentration gradient from high to low is formed in each tank, and the average sludge concentration in each tank is increased and the hydraulic load of the sedimentation tank is not changed under the condition that the effluent sludge concentration is not increased, so that the proliferation speed of phosphorus-accumulating bacteria and nitrifying bacteria is accelerated; the proportion in the total amount of the activated sludge is increased, so that the nitrogen and phosphorus removal effect is improved.

The invention provides a preparation method of a lithium-supplemented negative plate, the lithium-supplemented negative plate, a lithium ion battery and an electric device. According to the preparation method, rolling compounding is carried out by controlling the linear speed of a compression roller close to a lithium foil in a roller pair to be always greater than the linear speed of a compression roller close to the negative plate. The linear speed of the compression roller affects the actual tape running speed of the lithium foil and the negative pole piece, so that the lithium foil and the negative pole piece generate speed difference in a roller gap, at the moment, opposite tangential force is provided for the surface of the lithium foil by the roller pair, and the lithium foil can be thinned under the action of the tangential force, so that the lithium foil and the negative pole piece can be compounded, and the lithium foil and the negative pole piece can be thinned. And the lithium foil with the target lithium supplementing thickness can be obtained. According to the preparation method, the limitation on the thickness of the supplied material of the lithium foil is reduced, the lithium supplement of the lithium foil with the thickness of 0.1-5 microns in the lithium supplement negative plate can be realized through one-time processing and forming, the accuracy of the pre-lithium amount is improved, and the method does not need to be protected by a base material, so that the adhesion phenomenon is avoided, the technological process is saved, and the production cost is effectively reduced.