5360 results about "Ball mill" patented technology

The invention discloses a preparation method of a high-compaction lithium manganese iron phosphate positive electrode material, which comprises the following steps: placing a manganese source, an iron source and a phosphorus source in deionized water, stirring, carrying out primary high-speed ball milling, carrying out constant-temperature water bath, adding an oxidizing agent, stirring and oxidizing, and drying the slurry to obtain manganese iron phosphate precursor powder; carrying out primary sintering on the ferromanganese phosphate precursor powder to obtain a ferromanganese phosphate primary sintering material; putting the ferromanganese phosphate primary sintering material into deionized water, adding a lithium source and a carbon source at the same time, and performing stirring, secondary high-speed ball milling and drying to obtain lithium ferromanganese phosphate precursor powder; and carrying out secondary sintering on the lithium manganese iron phosphate precursor powder to obtain the high-compaction lithium manganese iron phosphate positive electrode material. The void ratio is well reduced and good carbon coating is realized by means of secondary grinding and secondary sintering, and compared with the prior art, the method has the advantages that good capacity can be maintained, the powder compaction density of the material can be improved, the conductivity can be improved, and the specific surface area of the material can be effectively reduced.

A fireproof magnesium oxide board is prepared by mixing the following raw materials, the raw material names and weight parts are as follows: 80-100 parts of magnesium oxide; 20-30 parts of anhydrous magnesium chloride; 10-20 parts of modified expanded vermiculite foaming agent; 20-30 parts of aluminum silicate fiber; 5-10 parts of sawdust; 10-15 parts of fly ash; 8-12 parts of glass magnesium board crushed powder; 1.5-5 parts of non-woven fabric; 10-20 parts of water; wherein the modified expanded vermiculite is prepared by the following steps: (1) Vermiculite is incompletely expanded and calcined; (2) acrylic acid monomer, sodium hydroxide, acrylamide monomer, initiator potassium persulfate, crosslinking aid pentaerythritol polyglycidyl ether, incompletely expanded vermiculite, and water are taken, stirred evenly and ultrasonically dispersed to obtain a first reaction solution, which is placed in a reactor for reaction to obtain a gel material; (3) the gel material is preliminarily crushed and dried, and then further crushed in a ball mill to obtain a fire-resistant expanded vermiculite with water absorption performance.

The invention discloses a high-strength short fiber carbon ceramic brake disc and a preparation method thereof, and the preparation method comprises the following steps: carrying out ball milling on silicon powder and carbon powder, mixing with thermosetting resin powder and thermoplastic resin powder, uniformly mixing carbon fiber and a coupling agent, adding the mixed powder, and uniformly mixing again. According to the short fiber carbon ceramic brake disc provided by the invention, the ball-milled silicon powder and carbon powder are uniformly dispersed in the matrix, meanwhile, the thermoplastic resin with good fluidity is added to form a network structure in the matrix, through holes are formed after carbonization, and the high-strength short fiber carbon ceramic brake disc is obtained. Silicon steam can enter in the ceramization process, and the problem that the carbon-ceramic composite material which is high in fiber content and large in thickness and formed at high temperature and high pressure is difficult to infiltrate can be effectively solved. The carbon-ceramic short fiber brake disc prepared by the method is low in aperture ratio and high in impact strength.

The invention relates to the technical field of ceramics, in particular to anti-fouling ceramic glaze water, anti-fouling ceramic and a preparation method of the anti-fouling ceramic glaze water, and the anti-fouling ceramic glaze water comprises the following raw materials in parts by weight: 10-15 parts of quartz, 5-10 parts of calcite, 5-8 parts of a silicon nitride-doped adhesion increasing agent, 4-7 parts of zinc oxide, 4-7 parts of spodumene and 4-7 parts of a modification regulator. According to the anti-fouling ceramic, the calcined talc, the potassium feldspar, the kaolin, the mullite and the water are subjected to blending and ball milling treatment, wet ball milling improvement is performed, the raw materials are blended and coordinated, a ceramic body is prepared through shaping treatment, meanwhile, anti-fouling ceramic glaze water is adopted for glazing, the silicon nitride-doped connecting agent and the modification regulator are added, and the silicon nitride-doped connecting agent and the modification regulator are matched and have a synergistic effect, so that the anti-fouling ceramic is prepared. The mechanical strength, the pollution resistance and the wear resistance of the obtained product are improved in a balanced manner, and meanwhile, the freezing resistance and the corrosion-resistant stability effect of the product are remarkable.

The invention provides an alkaline electrolytic water hydrogen production diaphragm based on zirconium oxide modification, the alkaline electrolytic water hydrogen production diaphragm comprises a support layer and a hydrophilic modified coating on the support layer, the hydrophilic modified coating is obtained by coating the support layer with a casting liquid prepared from modified zirconium oxide particles, a film-forming polymer and an organic solvent and then carrying out non-solvent induced phase inversion, the modified zirconium oxide particles are prepared by adding micron-sized zirconium oxide and alkali liquor into a ball mill for ball milling, and the particle size of the zirconium oxide subjected to ball milling treatment is 20-100nm. According to the method, the structure of the micron-sized zirconium oxide particles is regulated and controlled by combining a ball milling-alkali etching synchronous process. Through combination of ball milling treatment and alkali etching treatment, the dispersion degree and the reaction opportunity of the zirconium oxide powder can be effectively improved, and the efficiency of the etching process is remarkably improved. The obtained modified zirconium oxide particles endow the diaphragm with excellent hydrophilicity, alkali resistance and OH <-> ion conduction performance, and the diaphragm has excellent performance when being used as an alkaline electrolytic water hydrogen production diaphragm.

The invention belongs to the technical field of titanium alloy materials and additive manufacturing, and relates to a high-performance titanium-based composite material based on additive manufacturing and a preparation method of the high-performance titanium-based composite material. The preparation method comprises the following steps that titanium alloy powder subjected to vacuum drying treatment and titanium-coated reinforced phase nanoparticles are added into a ball mill to be subjected to ball milling treatment in the inert gas atmosphere, and evenly-mixed composite powder is obtained; and after the composite powder in the first step is subjected to vacuum drying, the composite powder is evenly laid on a forming base plate through additive manufacturing equipment, the composite powder is molten layer by layer through a heat source, and the high-performance titanium-based composite material is obtained after solidification. According to the titanium-based composite material and the preparation method thereof, TiB generated by the in-situ reaction of the B element in the titanium-coated reinforced phase nanoparticles and the Ti element in selective laser melting forming is adopted, the TiB is uniformly dispersed and distributed in a titanium alloy matrix, the prepared titanium-based composite material has good density, the strength, hardness and other properties of the material are obviously improved, and the comprehensive mechanical property is excellent.

The invention relates to the technical field of inorganic non-metal coating materials, in particular to high-stain-resistance enamel matte glaze and a preparation method thereof.The high-stain-resistance enamel matte glaze is prepared from selected quartz sand, feldspar and other basic raw materials by adding a composite additive Y and a rare earth activator Z. The preparation method comprises the steps that the basic raw materials are mixed and subjected to ball milling, then the additives are added for continuous ball milling, high-temperature melting, water quenching and secondary ball milling are conducted, and the high-stain-resistance enamel matte glaze is obtained. The granularity is controlled, and the stain resistance is improved. The enamel matte glaze has the advantages of obvious advantages, high stain resistance, difficulty in stain attachment, easiness in cleaning, capability of prolonging the service life of a product and reducing the maintenance cost, photocatalytic self-cleaning and environment-friendly characteristics, good matte effect and capability of improving the competitiveness of the product.

The invention relates to the technical field of engineering process control, and discloses a ball mill granularity soft measurement method based on a time sequence large model. Constructing a multi-feature fusion module for extracting multi-scale features based on Convld K3, Convld K5 and Convld K1, and constructing a soft measurement model in combination with multi-head attention and a large language module with a fixed weight; the soft measurement model generates a first feature and a query matrix, generates a key matrix and a value matrix according to a fixed weight of the large language module, generates a second feature based on the query matrix, the key matrix and the value matrix, and fuses the second feature with the first feature to obtain a fused feature; and then a granularity prediction result corresponding to the field data is obtained through a large language module, so that the problems that an existing soft measurement model is too high in dependence on large-scale sample data, insufficient in modeling capability for complex nonlinear process parameters and low in prediction precision are solved.

The invention discloses a method for detecting magnetic metal particles in a battery positive electrode material and application of the method, and the method comprises the following steps: mixing and stirring a positive electrode powder material, a solvent and a magnetic adsorption part, so that the magnetic metal particles in the positive electrode powder material are adsorbed on the surface of the magnetic adsorption part; collecting coarse magnetic metal particles on the surface of the magnetic adsorption part; the coarse magnetic metal particles and acid liquor are mixed and placed in a container, the side portion of the container is sleeved with an external magnetic ring, the container is placed on a ball mill to roll, and the external magnetic ring adsorbs the magnetic metal particles; pouring out the liquid in the container, taking down the external magnetic ring, and collecting the magnetic metal particles on the inner wall of the container to obtain a magnetic metal particle suspension; carrying out suction filtration and drying on the magnetic metal particle suspension to obtain magnetic metal particles; and detecting and analyzing the magnetic metal particles, and calculating the total number of the magnetic metal particles. Therefore, the test accuracy and the test efficiency of the number of the magnetic metal particles in the battery positive electrode material are improved.

The utility model relates to the technical field of ceramic processing, and discloses a ball-milling screening machine for ceramic preparation, which comprises an equipment main body, the equipment main body comprises two groups of equipment brackets, a barrel body, a driving device, a transmission belt and grinding balls, the equipment brackets are arranged at an interval, the barrel body is arranged between the two groups of equipment brackets, and the driving device is arranged on the barrel body. The driving device is arranged in the barrel body, the transmission belt is arranged at the output ends of the barrel body and the driving device in a sleeving manner, the grinding ball is arranged in the barrel body, feeding ports are formed in the top of the barrel body at intervals, and discharging ports are formed in the bottom of the barrel body at intervals. Limiting is conducted through the protruding filter plate, so that qualified abrasive materials are conveyed to the designated position, meanwhile, the situation that the abrasive materials meeting the specification are excessively ground can be effectively reduced, and the situation that interference is caused to the abrasive materials which are not ground completely is greatly reduced.

The invention relates to the technical field of intelligent analysis of aluminum oxide, in particular to an intelligent data analysis system and method based on aluminum oxide production. Acquiring ball mill parameters, raw material parameters and a spherical alumina impurity threshold, and determining a standard threshold according to the ball mill parameters and the raw material parameters; sampling and detecting the processed spherical aluminum oxide to obtain a purity and morphology image set of the spherical aluminum oxide; constructing a morphology image segmentation model to segment the morphology image set to obtain a first image set and a second image set; constructing a first image recognition model to recognize the first image set to obtain a spherical alumina parameter set, and calculating to obtain a first coefficient; constructing a second image recognition model to recognize the second image set to obtain an impurity parameter set, and calculating to obtain a second coefficient; and calculating the quality coefficient according to the first coefficient, the second coefficient, the spherical alumina impurity threshold and the spherical alumina purity. The comprehensive evaluation of the spherical aluminum oxide is realized through the quality coefficient of the spherical aluminum oxide.

The invention discloses a vibrating screen type crushing tungsten carbide powder ball mill, and relates to the related field of tungsten carbide powder processing, the vibrating screen type crushing tungsten carbide powder ball mill comprises a support frame, ball milling cylinder bodies and a crushing box, the left and right positions of the inner side of the support frame are rotatably provided with the ball milling cylinder bodies through rotating shaft connecting sleeves, and the crushing box is fixed to the top surface position of the left end of the support frame; the inner side of the rotating gear is fixed on the outer side of the ball milling barrel body; a water outlet of the water tank is connected to the bottom end of the water conveying pipe, and the pressure nozzle is arranged on the outer side of the crushing roller. According to the ball mill for the tungsten carbide powder capable of being crushed in the vibrating screen mode, the water conveying mechanism is arranged, water storage treatment can be continuously carried out on rod pieces of the crushing rollers through the arrangement of the water conveying mechanism, and water spraying dust suppression treatment is carried out on crushed materials through matched arrangement of a pressure nozzle; and in addition, unqualified materials are subjected to secondary crushing treatment through vibrating screen type filtering, so that the working efficiency of the ball milling barrel body can be improved.

Composite cement comprising Portland cement, a calcium carbonate and a mechanochemically activated clay obtained by grinding a clay raw material which was mined from one or more natural clay deposits in a ball mill or roller mill at a temperature below 150 °C until the absorbance units of the OH peak at 3600 to 3700 cm-1 and the SiO2 peak at 900 to 1000 cm-1 in an FTIR spectrum decrease by at least 20 %, as well as method for manufacturing the composite cement by blending Portland cement, calcium carbonate and the mechanochemically activated clay.

The invention relates to a magnesia-carbon refractory material with high thermal shock resistance and erosion resistance and a preparation method thereof. The magnesia-carbon refractory material with high thermal shock resistance and erosion resistance is prepared from fused magnesia aggregate, fused magnesia fine powder, silicon powder, crystalline flake graphite, Al2O3-MgO-CaO core-shell structure raw materials and phenolic resin. The Al2O3-MgO-CaO core-shell structure raw materials are prepared by the following steps: uniformly mixing calcium carbonate, magnesium hydroxide and alumina micro powder by adopting a planetary ball mill, and then carrying out granulation treatment by adopting a disc granulator by taking polyvinyl alcohol as a binding agent, so as to obtain core particles; and mixing the inner core particles and the alumina micro powder by taking alumina sol as a binding agent, and further sintering to obtain the core-shell structure raw material. The Al2O3-MgO-CaO core-shell structure raw material is utilized to improve the comprehensive performance of the magnesia-carbon refractory material, and the prepared magnesia-carbon refractory material has excellent thermal shock resistance and slag corrosion resistance and can meet the requirements of the current steel industry for the magnesia-carbon refractory material.

The invention relates to a ball mill-oriented integrated digital twinborn model construction method, and belongs to the field of intelligence of mining mechanical equipment. The method comprises the following steps: firstly, constructing a digital twinborn model which comprises a dimension module, a scale module, a scene module and a service module; a digital twinborn model is constructed by taking a dimension module as a reference and embedding a scale module, a scene module and a service module. Thirdly, constructing a multi-sensor information acquisition system, and acquiring actual operation data of the ball mill; and finally, inputting the collected data and the constructed digital twinborn model into a consistency evaluation system, and performing consistency evaluation on the constructed integrated digital twinborn model. And a twinning model support is provided for monitoring the state of the ball mill based on digital twinning. And the current state of the physical entity ball mill is reflected in real time through the state change of the digital twin model in the operation process. And intelligent fault diagnosis of the ball mill is facilitated.

The invention relates to the technical field of alloy materials, and discloses a preparation method of a nano WC-Co hard alloy for micro drilling, the nano WC-Co hard alloy comprises the following raw materials by weight: 83-92 wt% of nano tungsten carbide, 7-17 wt% of ultrafine cobalt oxide powder, 0-1.5 wt% of a hard alloy grain growth inhibitor, and 0.2-3 wt% of a forming agent; the method comprises the following steps: 1, mixing nano tungsten carbide, superfine cobalt oxide powder, vanadium carbide and a forming agent, and adjusting a carbon balance point in the powder to be mixed by using free carbon black; 2, sequentially putting the powder and a forming agent into a ball mill, and mixing the materials by taking absolute ethyl alcohol as a ball milling medium; the superfine cobalt oxide powder is used for replacing superfine cobalt powder, so that the extension area of cobalt element powder is increased, the problem that the cobalt powder is extended into a sheet shape is avoided, the cobalt pool phenomenon is effectively reduced, meanwhile, crystal grain growth inhibition carbides are increased, the phenomenon that a binding phase in hard alloy is not uniform is avoided, the service life of the finished micro-small-diameter drill bit special for the PCB is guaranteed, and the service life of the finished micro-small-diameter drill bit special for the PCB is prolonged. And the product quality is further improved.

The invention relates to a preparation method of a carbon fiber reinforced metal matrix composite brake disc, and belongs to the technical field of brake disc preparation. Immersing the carbon fiber in an ethanol solution containing a silane coupling agent, and drying; the aluminum-based alloy powder, the copper-based alloy powder and the silicon carbide particles are put into a planetary ball mill to be subjected to ball milling, and metal matrix mixed powder is obtained; the pretreated carbon fibers are woven into a three-dimensional woven prefabricated body, then pores of the prefabricated body are evenly filled with metal matrix mixed powder, cold press molding is conducted, and a composite material prefabricated body is obtained; putting the composite material prefabricated body into a vacuum hot-pressing sintering furnace, and sintering to form a carbon fiber reinforced metal matrix composite material brake disc blank; after solution treatment, adding a rare earth coordination type enhancer and carrying out aging treatment; the carbon fiber reinforced metal matrix composite brake disc prepared by the method has excellent wear resistance and mechanical properties, and can meet the use requirements of modern high-performance vehicles on brake discs.

The invention relates to the field of high-temperature anti-oxidation coatings, in particular to a tantalum-tungsten alloy surface high-temperature anti-oxidation composite coating and a preparation method thereof.The coating is composed of two layers of coatings with different components, the thermal expansion coefficients of the coatings and a base body are matched, the thermal expansion coefficients of the coatings are matched, and residual stress and thermal stress are reduced. The coating is prepared by adopting an embedding boriding and slurry melting method, and the used material components comprise ZrB2, MoSi2, 8YSZ, B, La2O3, Al2O3, NaF, TaSi2 and the like. The preparation method specifically comprises the following steps: putting a substrate into embedding powder for boronizing treatment, then mixing a coating material with ethanol and a binder, putting the mixture into a ball mill for wet mixing to prepare coating slurry, spraying the coating slurry on the surface of the substrate, and putting the substrate into a vacuum tube furnace for sintering to prepare a coating, thereby obtaining the high-temperature anti-oxidation composite coating. The binding force between the developed coating and the tantalum-tungsten alloy matrix is strong, and the tantalum-tungsten alloy matrix can be protected from oxidation corrosion or the oxidation rate can be slowed down within 500-2500s at the high temperature (2000 DEG C or above).

The invention provides a carbon quantum dot-ferric oxide nano composite material as well as a preparation method and application thereof. The composite material is prepared by the following steps: S1, mixing a ferrous sulfate solution with an imidazole methanol solution, and performing ultrasonic treatment to obtain a zeolite imidazate skeleton structure material containing an iron core; s2, calcining the zeolite imidazate skeleton structure material in an environment with a temperature range of 200-700 DEG C and oxygen partial pressure of 5-40% to obtain iron oxide with a complex frame structure; s3, synthesizing graphene carbon quantum dots with the size of 5-8 nm by adopting a trinitrophenol method; s4, the carbon quantum dots and ferric oxide powder are mixed and then evenly ground in a ball mill, the ball milling time is 60-240 min, the content of the added graphene carbon quantum dots is 0.5-3 wt%, and a carbon quantum dot-ferric oxide nanocomposite is obtained; according to the method, ferric oxide with a complex framework is compounded with the graphene carbon quantum dots, so that indoor VOCs can be oxidized at room temperature.

Shown and described is a laboratory ball mill, in particular a vibrating mill, centrifugal ball mill or planetary ball mill, further in particular a planetary ball mill with a transmission ratio of 1:−1, with at least one grinding bowl holder for at least one grinding bowl arranged on a machine part of the ball mill which is moved during the grinding operation of the ball mill, with a clamping device arranged on the moving machine part for transmitting a clamping force to the grinding bowl and with a coupling device with at least one coupling element, wherein an energy transmission from the stationary machine part to the moving machine part for generating the clamping force is provided via the coupling device. According to the invention, it is provided that the coupling element is coupled to the stationary machine part and to the moving machine part during the grinding operation.

The invention relates to the technical field of aluminum nitride powder preparation, and particularly discloses an aluminum nitride powder preparation device and a preparation process thereof.The aluminum nitride powder preparation device comprises a bottom plate, two mounting frames are fixedly mounted on the top face of the bottom plate, and a rotating frame is rotatably mounted between the two mounting frames through a rotating shaft; mounting shafts are rotationally mounted on the two opposite inner walls in the rotating frame, and the ends, close to each other, of the two mounting shafts are jointly and fixedly connected with a rotating ring which is obliquely arranged. The grinding barrel is driven by the switching assembly to adjust inclination around the axis center of the grinding barrel, so that raw material powder can be sequentially subjected to step-by-step ball milling in the two grinding cavities, the particle size of the raw material powder is rapidly reduced under the action of a large grinding medium, the total ball milling time is shortened, and the cold welding phenomenon is reduced; and the raw material powder is subjected to high-precision ball milling through a small grinding medium, so that the raw material powder is further refined, the influence of cold welding on the ball milling quality is reduced, and the agglomeration phenomenon is reduced.

The invention discloses a preparation method of high-rhenium and low-oxygen spherical tungsten-rhenium alloy powder, which comprises the following steps: proportioning tungsten powder and rhenium powder, adding into a ball mill for ball milling and mixing to obtain uniform composite powder slurry; the composite powder slurry is fed into a spray dryer to be subjected to spray granulation to form sphere-like alloy powder; and the spheroidized powder is subjected to plasma spheroidizing treatment to form the spherical tungsten-rhenium alloy powder. According to the preparation method disclosed by the invention, the tungsten-rhenium suspension slurry with uniformly dispersed components is prepared, and then granulation and spheroidization are carried out, so that the uniform state of the suspension is successfully solidified, oxygen can be reduced, impurities can be removed, and the spherical alloy powder with relatively large granularity and unlimited rhenium adding amount is prepared. The technical route flow is short, the process controllability is high, pilot scale production can be achieved, and the prepared tungsten-rhenium alloy spherical powder is high in density, sphericity degree and uniformity and low in oxygen content.

The invention discloses a preparation method of fine-grain aluminum oxide ceramics, and belongs to the technical field of electrostatic chucks, the preparation method comprises the following steps: powder pretreatment: dispersing nano aluminum oxide powder in a horizontal ball mill, adding a second-phase additive accounting for 1-10% of the total volume fraction, and uniformly stirring; mixing a second phase additive with a solvent, then adding a structure-directing agent PEG and a dispersing agent, carrying out ball milling in a planetary ball mill, and finally transferring the obtained solution into a vertical stirring mill for grinding; sol: firstly adding 60 parts of toluene, 20 parts of isopropanol and 20 parts of plasticizer into a pneumatic sol machine, and then adding 30-50 parts of adhesive; dispersing: weighing a certain amount of 3mm balls and a mixed solvent of methylbenzene and n-butyl alcohol into a stirring mill, then adding the pretreated nano aluminum oxide powder, and stirring; mixing: adding PVB colloid and transferring into a defoaming tank; vacuum defoaming: feeding the slurry in the roller ball mill into a defoaming tank by using N2 air pressure; and forming and sintering.

The present invention provides a method for preparing a carbon-containing lithium sulfide composite material, the method comprising: in a water-free and oxygen-free environment of a vacuum glove box, weighing a certain amount of lithium source and sulfur source, putting them into a ball mill, and then adding sodium borohydride according to a set ratio to mix evenly; sealing the ball mill, and passing an inert gas after evacuation, and then ball milling for a certain time at a set speed and after the ball milling is completed, taking out the lithium sulfide solid under the protection of the inert gas; dissolving and filtering the obtained lithium sulfide solid in anhydrous ethanol, and adding a certain amount of carbon source to the filtrate, stirring, and ultrasonic treatment; heating and evaporating to remove the solvent, and obtaining a solid Li2S / C precursor; placing the Li2S / C precursor in a vacuum freeze dryer, and freeze-drying to remove residual moisture to obtain a Li2S / C composite material. The present invention solves the problems of high cost and low purity when preparing lithium sulfide in the prior art.

The invention discloses a preparation method of electrode slurry for an electrostatic chuck, and belongs to the technical field of electrostatic chucks, powder is dispersed in an organic solvent through a ball mill, the powder is aluminum oxide powder and two or more kinds of carbide powder with different particle sizes, the D50 particle size of the aluminum oxide powder is 3-6 [mu] m, and the D50 particle size of the carbide powder is 3-6 [mu] m; powder with different particle sizes can have higher stacking density, few organic solvents are needed in the dispersion process, shrinkage after sintering is small, and cracking and layering of electrode slurry are not prone to being caused; ball-milling and dispersing the powder, drying in a drying oven for 24 hours, grinding by using a mortar, and sieving for later use; and mixing the sieved powder with an organic carrier with the solid content of 60-80%, mixing for 30-60 minutes in a mixing and kneading machine, and then rolling in a three-roller machine to obtain the required electrode slurry. According to the invention, three kinds of particles with different particle sizes are mixed, so that the powder bulk density is greatly improved, the electrode thickness controllability is improved, and the shrinkage ratio after burning is reduced.

The invention discloses a samarium cobalt permanent magnet and a preparation method and application thereof. The preparation method comprises the following steps: (1) carrying out crushing and jet milling on an alloy ingot formed by raw materials required by the samarium-cobalt permanent magnet to obtain first alloy fine powder with D50 of 4-6 microns; (2) 15-30 wt% of the first alloy fine powder is taken out, then the taken-out first alloy fine powder is subjected to ball milling, and second alloy fine powder with D50 being 0.5-1.2 microns is obtained; (3) the remaining first alloy fine powder and the second alloy fine powder obtained in the step (2) are mixed, and mixed powder is obtained; 4) carrying out orientation molding and isostatic pressing on the mixed powder to obtain a green body; and the green body is subjected to sintering, solid solution and aging treatment, and the samarium-cobalt permanent magnet is obtained. By adopting the preparation method disclosed by the invention, the bending strength of the samarium-cobalt permanent magnet can be obviously improved on the basis that the magnetic performance of the samarium-cobalt permanent magnet is not reduced basically.

The invention discloses a preparation method of aluminum nitride by spray granulation, which belongs to the technical field of ceramic preparation. The method comprises: adding aluminum nitride powder and a dispersant into a ball mill for ball milling for 24 to 26 hours, adding an adhesive and a solvent thereto, wherein the adhesive is acrylic resin or PVB, and continuing ball milling for 15 to 18 hours after the adhesive and the solvent are added, the ball milling speed of the ball mill is set to 100 to 200 rpm, the diameter of the ball milling beads is 20 to 50 mm, the number of the ball milling beads is 200 to 300, and aluminum nitride slurry is formed after ball milling; the aluminum nitride slurry is sucked into a granulation tower, and the parameters of the granulation tower are set to: an air inlet temperature of 130 to 140 DEG C, an air outlet temperature of 80 to 90 DEG C, a rotation speed of an atomizing disk of 7000 to 8000 rpm, and a feed pump rotation speed of 50 to 60 rpm; collecting samples at a discharge port of the granulation tower, and then testing the samples and recording the test results.

The invention belongs to the technical field of cable processing, and relates to a preparation method and application of a flexible superconducting coaxial cable outer conductor. The preparation method comprises the following steps: mixing Nb powder and Ti powder by adopting a vibrating ball mill to prepare NbTi composite powder; a substrate of laser powder bed melting equipment is preheated, the NbTi composite powder is spread on the substrate of the laser powder bed melting equipment, a melting powder layer is scanned through the laser powder bed melting technology, a three-dimensional communicated grid structure is formed through interlayer staggered scanning, finally, the NbTi net-shaped alloy pipe is placed in a strong acid solution to be soaked for a short time, redundant metal powder is removed, and the NbTi net-shaped alloy pipe is obtained. And finally, the preparation of the flexible superconducting coaxial cable outer conductor for the quantum computer is realized.

The invention discloses an on-line oil liquid detection system and method for cement ball milling, and relates to the technical field of industrial equipment state monitoring and fault diagnosis, the system comprises a data acquisition module, a data processing module, a data processing module and a data processing module, the data acquisition module adopts a multi-channel vibration sensor array to perform synchronous data acquisition on positions of a ball mill bearing seat, a gear box and a transmission shaft; an original vibration signal matrix containing multi-component coupling information is obtained through high-frequency sampling, if the sampling frequency is lower than ten times of the wear characteristic frequency, sampling parameters are automatically adjusted until the Nyquist theorem requirement is met, and the fault early warning and model self-adaption module adapts to the change of the equipment operation condition by updating the model parameters in real time; according to the online oil detection system and method for the cement ball mill, the equipment operation reliability and maintenance efficiency are effectively improved, the service life is prolonged, the maintenance cost is reduced, and data support is provided for preventive maintenance decision making of the ball mill.

The invention discloses a preparation method and sodium storage application of a sodium-enriched sodium ferric sulfate composite material. The preparation method comprises the following steps: carrying out low-speed ball milling on iron-based sulfate and dispersed CNTs (Carbon Nanotubes), carrying out vacuum drying, carrying out heat treatment, and naturally cooling to room temperature to obtain FeSO4 / CNTs; the preparation method comprises the following steps: mixing FeSO4 / CNTs and anhydrous Na2SO4 according to a molar ratio of Na to Fe of 7: 5.5, carrying out low-speed wet ball milling, carrying out vacuum drying, and grinding to obtain Na2SO4 / FeSO4 / CNTs; and compacting Na2SO4 / FeSO4 / CNTs, placing the Na2SO4 / FeSO4 / CNTs in a tubular furnace, preserving heat at 350-400 DEG C for 10-24 hours, cooling to room temperature, and grinding to obtain the Na7Fe5.5 (SO4) 9 / CNTs composite material. The Na7Fe5.5 (SO4) 9 positive electrode material disclosed by the invention has good sodium storage specific capacity, excellent rate capability and stable long cycle life.