214 results about "Wet grinding" patented technology

The invention discloses a three-dimensional wet grinding machine and method based on metal powder machining, and relates to the technical field of wet grinding machines, the three-dimensional wet grinding machine comprises a rack, a wet grinding tank is arranged at the top of the rack, two material ports are formed in the outer side of the wet grinding tank, the two connecting frames are both fixedly connected to the outer side of the wet grinding tank, and the two material ports are arranged in the wet grinding tank. The two connecting frames are rotationally connected with the rack, and a transmission device used for driving the connecting frames to rotate is arranged in the rack. After wet grinding is completed, powder slurry is discharged, then the traction piece drives the driving mechanism to ascend, a medium is forced to continuously penetrate through the driving mechanism, abraded grinding balls in the medium are discharged in batches through the screening piece, the abraded grinding balls in the wet grinding tank can be automatically screened out, and it is avoided that a large number of grinding balls need to be discharged; and after discharging, screening treatment is carried out, and the discharged materials are supplemented.

The invention discloses an efficient pollution-free treatment method for municipal waste incineration fly ash, and relates to the technical field of waste resource utilization and environmental protection. Comprising the following steps: S1, adding the garbage fly ash into a hydrochloric acid solution, carrying out wet grinding, and carrying out centrifugal separation to obtain heavy metal filtrate and heavy metal-removed fly ash; washing the heavy metal-removed fly ash with clear water to obtain a washing solution; mixing the washing liquid with the heavy metal filtrate to obtain a heavy metal solution; s2, adding a complexing agent into the heavy metal solution, stirring and mixing, standing overnight, performing centrifugal separation to obtain a heavy metal removal solution and a heavy metal complex, and adjusting the pH value of the heavy metal removal solution to be neutral to complete heavy metal removal treatment; s3, uniformly mixing the washed heavy metal-removed fly ash and a catalyst, performing low-temperature pyrolysis treatment, sieving and separating to obtain dioxin-removed fly ash, and completing dioxin removal treatment; and S4, the heavy metal removal solution and the heavy metal complex are treated, and garbage fly ash treatment is completed.

The invention discloses a method for preparing an underground cemented high-water-expansion filling material from negative carbon all-solid waste and application, the method comprises the following steps: raw material pretreatment: mixing magnesium slag, steel slag and a dispersion medium to prepare solid waste slurry, adding an inducer into the solid waste slurry, and carrying out wet ball milling treatment to obtain first slurry; wet grinding and carbonization: under the condition of continuously introducing CO2, carrying out wet ball-milling treatment on the first slurry to obtain second slurry; thickening and expansion regulation and control: adding a thickening agent and an expansion regulation and control agent into the second slurry, then carrying out wet ball milling treatment to obtain third slurry, mixing and molding, mixing the third slurry with a dispersion medium, gypsum and copper tailings, and carrying out vibration molding to obtain the underground cementing high-water-expansion filling material. The method takes industrial solid waste as a raw material, has double benefits of carbon sequestration and resource utilization, and is suitable for projects such as mine goaf filling and the like.

The invention discloses a preparation method of high-purity lithium sulfide based on a carbon reduction method, and belongs to the technical field of material preparation. Comprising the following steps: S1, mixing anhydrous lithium sulfate with a reducing agent, and adding absolute ethyl alcohol as a solvent, S2, drying a material subjected to wet grinding, removing the absolute ethyl alcohol solvent and water, and transferring the material into a tubular furnace or an atmosphere sintering furnace to obtain a dried material; s3, the environment temperature in the furnace is increased to 600-800 DEG C at the heating rate of 5-12 DEG C / min, heat preservation is conducted for 30-60 min, and a reduction reaction is conducted; s4, after a reduction reaction product is cooled to the room temperature, adding absolute ethyl alcohol, stirring until the absolute ethyl alcohol is fully dissolved, completing solid-liquid separation through a suction filtration device, collecting filtrate and distilling; and S5, drying the distilled product to obtain the high-purity lithium sulfide. By accurately controlling the raw material purity, the reaction parameters and the purification process, the product purity is greater than or equal to 99.5%, the yield is greater than or equal to 89%, and the high-performance application requirements of solid-state batteries and the like are completely met; the method is simple in process steps, moderate in equipment requirements and suitable for large-scale industrial production.

The invention discloses a method for preparing YAG transparent ceramic by two-step sintering, which comprises the following steps: 1) weighing yttrium oxide powder and aluminum oxide powder according to a stoichiometric ratio, mixing, and carrying out solid-phase reaction to synthesize YAG powder; 2) performing dry grinding and wet grinding on the obtained YAG powder to obtain mixed slurry; 3) drying the obtained mixed slurry to obtain powder, and performing compression molding and cold isostatic pressing to obtain a ceramic biscuit; and 4) pre-sintering the obtained ceramic biscuit in an oxygen-containing atmosphere, embedding the pre-sintered ceramic with oxide particles, and carrying out hot isostatic pressing sintering to prepare the YAG transparent ceramic. On the basis of obtaining the YAG transparent ceramic with high optical quality, a microstructure with a fine grain size can be obtained, and good mechanical properties are considered; the preparation method is simple, the equipment cost and energy consumption are low, the traditional annealing step can be omitted, and a new thought can be provided for preparation of the high-performance YAG transparent ceramic.

The invention discloses a superfine grinding and cooling process for producing a kaolin raw material. The superfine grinding and cooling process comprises the following steps: (1) pulping; (2) front-section wet grinding; (3) cooling: pumping the slurry A in the step (2) into a cooling tower for cooling through a slurry pump at the flow rate of 30-70m < 3 > / h to obtain slurry B with the temperature of 30-45 DEG C and the mass concentration of 35-45%; and (4) carrying out rear-section wet grinding. The superfine grinding and cooling process for producing the kaolin raw material has the beneficial effects that the particle collision requirement of superfine grinding is met, the consumption of a dispersing agent is reduced due to low temperature, the total consumption of the dispersing agent is finally reduced, the use cost of the raw material is further reduced, the service life of rear-section wet grinding equipment is prolonged, the maintenance cost is reduced, and the service life of the kaolin raw material is prolonged. And the granularity D92 of the slurry is less than 2 microns, less impurities are introduced, and the qualified rate of the product is more than 95%.

The present application belongs to the technical field of aluminate binder production, and particularly relates to a preparation method of aluminate binder. Main raw materials of aluminum hydroxide, calcium chloride, calcium oxide and aluminum oxide are used, accurate and fine batching is carried out according to the corresponding chemical composition of the mineral phase composition, and wet grinding is carried out by using a ceramic grinding process, so that the super-micro powder raw material with extremely high fineness and extremely high homogenization degree can be obtained. After the powder is subjected to pressure filtration separation, the powder is subjected to drying treatment, and then the automatic forming equipment is used to press the raw material blank into the tunnel kiln for calcination. After the calcined blank is crushed and ground, the aluminate binder is finally prepared.

The invention discloses a magnetic separation, enrichment and recovery process for low-grade vanadium titano-magnetite, which belongs to the technical field of comprehensive utilization of vanadium titano-magnetite, adopts a combined mineral separation process of dry pre-enrichment and tailing discarding, wet grinding, concentration and refinement, combination of gravity and magnetism and middling retreatment, selects mature industrial equipment and optimizes the combination. High-efficiency dry pre-selection equipment, wet grinding equipment, a multi-section reselection and middling retreatment system and solid-liquid separation equipment are utilized, a large amount of tailings are discarded at the front end of a mine, iron and titanium are efficiently separated and comprehensively recycled in the middle main process, the recycling rate bottleneck is broken through through the middling retreatment technology, near-zero discharge of wastewater is achieved, and compared with a conventional process, water can be saved by 50-60%, and the economic benefit is high. According to the method, the grinding and separation cost is saved by 60-70%, the energy-saving effect is remarkable, the purposes of cost reduction, efficiency improvement, comprehensive utilization of resources and clean production are achieved, the production and technical problems of low-grade vanadium titano-magnetite mine enterprises in arid and water-deficient areas are effectively solved, and the method is suitable for large-scale production and application.

The invention relates to a high-temperature alloy-Ti (C, N) composite metal ceramic material and a preparation method thereof, and belongs to the technical field of metallurgy. The preparation method comprises the following steps that S1, high-temperature alloy powder and Ti (C, N) ceramic powder are subjected to dry grinding, ultrasonic dispersion, wet grinding and drying, and metal ceramic powder is obtained; and S2, the metal ceramic powder is subjected to two-way pressing, vacuum sintering and cooling, and the high-temperature alloy-Ti (C, N) composite metal ceramic material is obtained. The high-temperature alloy-Ti (C, N) composite metal ceramic material prepared by the method has excellent high hardness, obdurability and high-temperature resistance, has outstanding room-temperature and high-temperature mechanical properties, and can meet the strict requirements of extreme working conditions and high-speed cutting on the comprehensive properties of the material.

The invention discloses a low-cost preparation method of an ardealite-ferronickel slag high-early-strength low-carbon cementing material. The method comprises the following steps: respectively carrying out wet grinding treatment on a mixture of ferronickel slag, ardealite and quick lime for 5-6 hours at the rotating speed of 400 rpm, and adding 1.5-2% of a water reducing agent, so as to obtain mixed ardealite slurry with median particle sizes D50 of 3.5-4.5 microns and D50 of 2-3 microns; and mixing and stirring 50% of nickel-iron slag slurry, 40% of phosphogypsum and quicklime co-wet-ground mixed slurry and 10% of ordinary Portland cement in a stirrer to obtain the high-early-strength and high-dosage phosphogypsum-nickel-iron slag-based cementing material. The ardealite-ferronickel slag high-early-strength low-carbon cementing material is prepared, a new building material is provided for the building material market, and a new way is found for solid waste resource utilization of ardealite and ferronickel slag.

The invention relates to the technical field of deep processing of natural products, in particular to water-soluble turmeric with low hygroscopicity and high stability and a preparation method and application thereof. The preparation method comprises the following steps: mixing and cross-linking a curcumin-ethanol solution and a chitosan-acetic acid solution, and drying to obtain curcumin-chitosan compound nanoparticles; and adding the nano-particles into a wall material solution containing starch sodium octenylsuccinate, maltodextrin, high-branched-chain cyclodextrine and hydroxypropyl starch, emulsifying, homogenizing at high pressure, performing wet grinding and drying to obtain the water-soluble turmeric with low hygroscopicity and high stability. The prepared product is good in water solubility, high in turmeric content, good in stability, not prone to moisture absorption and caking in the high-temperature and high-humidity environment and good in fluidity, solves the problems of moisture absorption, caking and the like of water-soluble powder turmeric products after being transported for a long time in the high-temperature and high-humidity environment, and is suitable for the fields of food, medicine, cosmetics and the like.

This invention discloses an additive with chloride-fixing and toughening functions, its preparation method, and its application. The additive uses tricalcium aluminate and sodium acrylate as main raw materials. Under alkaline conditions, a wet grinding process hydrates tricalcium aluminate to form a calcium-aluminum layered bimetallic hydroxide structure, allowing acrylate atoms to intercalate into the interlayer, forming a stable organic-inorganic composite structure. When applied to cement-based materials, the layered structure reacts with chloride ions to generate chloride-containing hydration products, achieving chloride ion solidification. Simultaneously, the organic components in the composite structure undergo polymerization under the action of an initiator, forming a polymer network in the cement matrix, thereby improving the material's toughness. When added to cement-based materials at 1-5% of the cementitious material mass, the 28-day flexural strength can be increased by 38%-113%, and the 28-day chloride ion solidification rate can be increased by 17%-23%, while maintaining good workability. This invention achieves the simultaneous introduction of chloride ion solidification and material toughening functions through a single additive, simplifying the material system. It is suitable for cement-based materials containing endogenous chloride ions and has good engineering application prospects.

The invention relates to the technical field of lithium ion positive electrode materials and preparation thereof, and discloses a ferromanganese phosphate precursor and a method for preparing a lithium ion battery positive electrode material from the ferromanganese phosphate precursor, a lithium ion battery positive electrode is prepared from the ferromanganese phosphate precursor, and the precursor, a lithium source, a phosphorus source and a carbon source are subjected to wet grinding to obtain uniform slurry; performing spray drying to obtain precursor microspheres; sintering at high temperature in an inert atmosphere to obtain a lithium manganese iron phosphate positive electrode material; and finally preparing the positive pole piece of the lithium ion battery. According to the method, the precursor is taken as a core, the problems of non-uniform distribution of iron and manganese elements and poor batch stability in a traditional process are solved, and the prepared positive electrode material has the advantages of high specific discharge capacity, good rate capability and long cycle life, and is suitable for large-scale production.

The invention relates to the technical field of ceramic materials, in particular to temperature-stable low-loss low-dielectric tetragonal lithium-based microwave dielectric ceramic and a preparation method thereof, the chemical formula of the microwave dielectric ceramic is LiScO2, and the preparation raw materials are Li2CO3 and Sc2O3. The preparation method comprises the following steps: weighing Li2CO3 powder and Sc2O3 powder according to a certain proportion, mixing, sequentially carrying out wet grinding and drying, pre-sintering for 4-8 hours in an air atmosphere at the temperature of 700 DEG C to obtain pre-sintered powder, carrying out secondary ball milling and drying on the pre-sintered powder, adding a binder, granulating, carrying out compression molding, and finally sintering for 4-8 hours in an air atmosphere at the temperature of 875-925 DEG C, so as to obtain the Li2CO3 / Sc2O3 composite material. The tetragonal lithium-based microwave dielectric ceramic can be obtained. The LiScO2 microwave dielectric ceramic prepared at the sintering temperature of 900 DEG C has a near-zero temperature coefficient of resonance frequency (-3.4 ppm / DEG C), can ensure the thermal stability of devices, and is widely used for manufacturing various dielectric antenna substrates, resonators, filters and other microwave devices.

This invention provides a method for producing fine polyolefin powder in micrometer units, characterized by uniform particle shape, average particle size, and particle size distribution. [Solution] This invention relates to a method for producing polyolefin ultrafine powder and the polyolefin ultrafine powder produced thereby. Specifically, the method involves mixing and heating a polyolefin resin with a xylene mixed solvent to produce a polyolefin molten liquid, then cooling and crystallizing it, and then ultrafine grinding the crystallized reactant through a vacuum wet grinding step and a dry grinding step, in which wet grinding and drying are performed simultaneously with the solvent, thereby providing an ultrafine polyolefin powder with an average particle size of approximately 30 μm or less. A xylene mixed solvent is used as the mixed solvent for melting the polyolefin resin, and the ultrafine polyolefin powder produced thereby can be applied to general-purpose material fields such as construction, civil engineering, and chemical products, and has physical properties that are particularly advantageous for the manufacture of secondary battery electrodes.

This invention discloses a method for preparing high-purity, highly dispersed nano-silicon nitride powder. The method involves ball milling raw materials including silicon dioxide powder, fatty acids, and a wet grinding agent, followed by a hydrothermal reaction with a carbon source to obtain a precursor powder. The precursor powder is then subjected to reduction nitridation and decarbonization to obtain the final product. The mass ratio of silicon dioxide powder, fatty acids, and the wet grinding agent is 100:0.1–1:10–50. The carbon source comprises 50–80% of the silicon dioxide powder mass by weight of carbon. This method, through fatty acid modification of silicon dioxide, not only effectively avoids particle agglomeration but also alters the interfacial tension of silicon dioxide. During the hydrothermal process, the fatty acid layer coating the silicon dioxide surface acts as a carbonization active site, uniformly carbonizing with the carbon source on the silicon dioxide surface. This effectively solves the problem of uneven mixing of silicon dioxide and carbon, improves the purity of the silicon nitride product, and significantly reduces the content of impurities such as oxygen and carbon in the product.

The application relates to a recycling method of aluminum hydroxide coarse powder, and belongs to the technical field of aluminum hydroxide powder preparation. The method comprises the following steps: obtaining a sodium aluminate solution; adding aluminum hydroxide seeds into the sodium aluminate solution to perform first precipitation decomposition, so as to obtain a decomposition slurry; performing grading treatment on the decomposition slurry to obtain aluminum hydroxide coarse powder; mixing the aluminum hydroxide coarse powder with water according to a set solid content, and then performing wet grinding treatment, so that the particle size of the aluminum hydroxide coarse powder is reduced, and a wet grinding slurry is obtained; and mixing the wet grinding slurry with the decomposition slurry to perform second precipitation decomposition, so as to obtain fine powder aluminum hydroxide. The method converts the originally unusable aluminum hydroxide coarse powder into high-activity secondary seeds, realizes the closed loop circulation of "coarse powder -> wet grinding -> secondary seeds", directly uses the byproduct to replace the preparation process of the sodium aluminate solution in the traditional resolvent process, and reduces the production cost of the fine powder.

The invention discloses a method for preparing oxidized pellets by grinding hematite powder for sintering in the technical field of ferrous metallurgy. The method comprises the following steps: (1) mixing hematite powder for sintering with an additive, and carrying out wet ball milling pretreatment to obtain hematite ore pulp; the additive comprises limestone and calcium humate; (2) the hematite ore pulp is subjected to filter pressing dehydration, and a fine hematite filter cake is obtained; (3) the fine hematite filter cake, magnetite fine powder, a binder and water are mixed for pelletizing, and green pellets are obtained; and (4) drying, preheating, roasting, soaking and cooling the green pellets in sequence to obtain finished oxidized pellets. Limestone and calcium humate are added in the wet grinding process, ore pulp dehydration is remarkably improved, a low-water-content uniform filter cake is obtained, follow-up pelletizing and roasting performance is considered, and a foundation is laid for stable preparation of high-quality oxidized pellets.

The invention discloses a preparation method of a starch-based bacteriostatic microcapsule, which is characterized in that octenyl succinic acid modified starch is used as a wall material, sorbic acid is used as a core material, and the starch-based bacteriostatic microcapsule with high loading capacity and high embedding rate is prepared by combining rod pin type wet ball milling and spray drying embedding. The sorbic acid is subjected to wet grinding by adopting rod pin type ball milling, the sorbic acid is fully ground in a suspension environment, the particle size is reduced, composite embedding of starch and an active agent in the grinding process is provided, the microcapsule is prepared through spray drying treatment subsequently, the loading capacity of the microcapsule exceeds 10%, the embedding rate is higher than 90%, and the preparation method is simple and easy to operate. A new thought is explored in the field of starch-based microcapsule embedding, and meanwhile microcapsule products are effectively put into the manufacturing process of baked products.

The application provides a preparation method of a lithium iron phosphate material, and the method comprises the following steps: mixing first iron phosphate, lithium carbonate, a first carbon source and deionized water in a certain proportion to obtain a first mixed solution, stirring and dispersing, first wet grinding, spray drying, first sintering and first crushing to obtain a lithium iron phosphate intermediate; mixing the lithium iron phosphate intermediate, second iron phosphate, lithium carbonate, a second carbon source, a dopant and deionized water in a certain proportion to obtain a second mixed solution, stirring and dispersing, second wet grinding, spray drying, second sintering, second crushing to obtain the lithium iron phosphate material; wherein the average particle size of the lithium iron phosphate intermediate is larger than that of the lithium iron phosphate material. The process flow is simple, and the material has high compactness. The application further provides the lithium iron phosphate material and a lithium ion battery.

The application belongs to the technical field of cosmetics, and particularly relates to a maleic acid and ectoine co-crystal as well as a preparation method and application thereof. The application comprises the following steps: mixing maleic acid and ectoine, and adopting a wet grinding process to obtain a maleic acid and ectoine co-crystal; and the molar ratio of the maleic acid and the ectoine is (0.8-1.2):(0.8-1.2). The maleic acid and ectoine co-crystal composition is prepared by the wet grinding method. The maleic acid and ectoine co-crystal can significantly improve the tensile strength of oxidatively damaged hair, and significantly repair the oxidatively damaged hair; and the content of hair ROS caused by photoaging is significantly reduced, and the maleic acid and ectoine co-crystal has a strong anti-photoaging effect. Meanwhile, the co-crystal preparation method is simple, has good repeatability, and is suitable for industrial production.

The invention relates to a preparation method and application of monodisperse high-alpha-phase nano alumina, which comprises the following steps: carrying out wet grinding on industrial alumina by using a sand mill to obtain a sanding slurry, centrifuging the sanding slurry, taking the upper emulsion, adjusting the pH value to 8-10, standing for one night, centrifuging, taking the lower precipitate, and freeze-drying to obtain the monodisperse high-alpha-phase nano alumina. And a nanoscale precursor is obtained. And finally, carrying out heat preservation on the nanoscale precursor in a high-temperature muffle furnace for a period of time to obtain the high-alpha-phase nano aluminum oxide. According to the high-alpha-phase nanometer aluminum oxide powder, the alpha conversion rate is 95% or above, the particle size ranges from 100 nm to 300 nm, the morphology is in a sphere-like shape, good filling performance and heat conductivity coefficient are shown in heat-conducting glue, meanwhile, the characteristic of good weather resistance is achieved, and the requirement for diversification of heat-conducting raw materials in the heat dissipation market of electronic equipment is met.

The invention relates to the technical field of permanent magnetic ferrite materials, and discloses a high-performance permanent magnetic ferrite material with both high residual magnetism and high coercive force and a preparation method thereof.The main crystalline phase of permanent magnetic ferrite is M-type ferrite, raw materials are matched according to the mass percent, ferric oxide accounts for 84-88 wt%, strontium carbonate accounts for 12-16 wt%, and 1-1.5 wt% of SiO2 is added; the preparation method comprises the following steps: calculating the weight of iron oxide and strontium carbonate according to the mass percentage, calculating the weight of SiO2 according to the total weight, and uniformly mixing; pre-sintering, cooling and crushing to obtain a pre-sintered material; adding the pre-sintered material into a ball mill, adding distilled water and a secondary additive, and performing wet grinding to obtain slurry; orientation molding: carrying out compression molding on the slurry under an orientation magnetic field to obtain a green body; and sintering the green body, and cooling to room temperature to obtain the permanent magnetic ferrite. By optimizing the ratio of the composite alkaline earth metal and cooperatively doping Co and rare earth elements, the magnetic performance is improved.

The invention belongs to the technical field of grinding equipment, and discloses functional calcium carbonate powder production wet grinding equipment which comprises a fixing assembly, a driving assembly is fixedly mounted at the bottom of the fixing assembly, a screening assembly is arranged in the middle of an inner cavity of the fixing assembly, and a scraping assembly is arranged at the upper end of the inner cavity of the fixing assembly. A stirring assembly is fixedly mounted at the upper end of the driving assembly and located in an inner cavity of the fixing assembly. According to the functional calcium carbonate powder wet grinding equipment, part of calcium carbonate powder meeting the requirement falls to the lower end of an inner cavity of the fixing assembly through the sieve tray, the device conveys the calcium carbonate powder in a reciprocating mode, and the calcium carbonate powder is made to meet the requirement during wet grinding; and the calcium carbonate powder which does not meet the requirement does not need to be repeatedly added into the wet grinding equipment by an operator during wet grinding, so that the effects of saving a large amount of energy and time during grinding of the calcium carbonate powder and improving the wet grinding efficiency of the calcium carbonate powder are achieved.

This utility model relates to the field of mineral processing technology, and more particularly to a dry mineral processing production system. The system includes: a calcination device, a wet grinding device, a leaching device, a first filter press device, and a re-slurry device. The output of the calcination device is connected to the input of the wet grinding device for calcining the ore. The output of the wet grinding device is connected to the input of the leaching device for crushing the calcined ore. The output of the leaching device is connected to the input of the first filter press device for acid leaching the wet-ground slurry. The output of the first filter press device is connected to the input of the re-slurry device for solid-liquid separation of the leached slurry. The re-slurry device is used to clean the substandard ore after filter press. These interconnected components provide reliable technical support for dry mineral processing production, helping to improve both efficiency and quality.

The invention provides an antibacterial polyester POY filament and a preparation method thereof, and the preparation method comprises the following steps: (1) mixing a first raw material system comprising antibacterial nano-powder and a surface modifier with a first solvent, and carrying out wet grinding to obtain modified nano-powder; and (2) mixing a second raw material system containing the modified nano powder, a dispersing agent and first polyester, and carrying out melting treatment to obtain the master batch. The preparation method of the antibacterial polyester POY filament provided by the invention has good processability, and the prepared antibacterial polyester POY filament has excellent antibacterial property and mechanical property.

The application belongs to the technical field of hard alloy and particularly relates to a hard alloy for mine exploitation screw thread drilling and a preparation method thereof, the preparation method comprising the following steps: S1, obtaining tungsten carbide, cobalt powder, tantalum carbide and nickel powder as raw materials, wherein the tungsten carbide is composed of first tungsten carbide and second tungsten carbide; S2, after the cobalt powder, the tantalum carbide and the first tungsten carbide are mixed and then subjected to first wet grinding, first mixed material is obtained, after the first mixed material and the nickel powder are mixed and then subjected to second wet grinding, second mixed material is obtained, after the second mixed material and the second tungsten carbide are mixed and then subjected to third wet grinding, third mixed material is obtained; S3, after the third mixed material is subjected to drying, pressing and sintering, the hard alloy is obtained. According to the application, the large ball material ratio and the coarser tungsten carbide can effectively break the agglomeration of tantalum carbide powder and improve the dispersibility of the tantalum carbide powder, nickel is additionally added as a second phase toughening agent, a large-diameter grinding rod and a small-diameter grinding ball are adopted to improve the grinding efficiency and promote the homogeneous distribution of the additive and the binder and improve the toughness of the product.

The invention discloses a dynamic gas stripping control system and method for a grinding ball adhesion layer in wet ball milling. The dynamic gas stripping control system comprises a sensing detection unit, a signal processing and control unit, a gas control execution unit, a human-computer interaction interface module and a feedback loop module, through the synergistic effect of acoustic emission monitoring, viscosity feedback and an intelligent control algorithm, dynamic matching control over high-pressure gas injection time, pressure and frequency is achieved, and therefore real-time stripping and self-adaptive adjustment of a grinding ball adhesion layer are achieved in the wet grinding process.

The invention provides nickel-based powder, an alkaline water electrolysis hydrogen production electrode and a preparation method, and relates to the technical field of surface treatment. The preparation method of the nickel-based powder comprises the following steps: sequentially carrying out sensitization and activation treatment on aluminum powder through a SnCl2-HCl solution and a PdCl2 solution; adding the activated aluminum powder into a target solution, and carrying out a water bath heating reaction; wherein the target solution comprises nickel sulfate, sodium citrate, citric acid, sodium hypophosphite and thiourea; carrying out vacuum filtration, washing and drying treatment on the product subjected to water bath heating to obtain intermediate nickel-based powder; the intermediate nickel-based powder, a nickel powder raw material, a wet grinding medium and a forming agent are put into a ball mill to be subjected to wet grinding and mixing, and mixed slurry is obtained; and the mixed slurry is converted into spherical agglomerated powder in a spray granulation mode, the spherical agglomerated powder is sintered, cooled and sieved, and the nickel-based powder is obtained. According to the invention, the problem of performance degradation of the alkaline electrolytic water hydrogen production electrode caused by oxidation of the nickel-based coating can be effectively inhibited.

The invention relates to the field of solid-state battery recovery, and provides a method and special equipment for low-temperature acid-free closed-loop recovery of an all-solid-state battery. According to the method, special equipment is matched with the method, efficient metal separation is carried out on the mixed powder of the positive electrode and the negative electrode through reduction, wet grinding and magnetic separation, the obtained metal is high in purity and can be used for preparing a secondary battery, and byproducts generated in the period can be recycled as building material additives; and finally realizing high-valued and closed-loop recovery of lithium, transition metal, solid electrolyte and a current collector in the sulfide-oxide composite all-solid-state battery material under the conditions that the temperature is less than or equal to 300 DEG C and the pressure is normal.