491 results about "Jet mill" patented technology

The invention discloses an intelligent fluidized bed jet mill, and relates to the technical field of material crushing and grading equipment. The equipment comprises a hardware part and a control module, wherein the hardware part consists of a crushing area, a feeding area and a grading area. Low-temperature and high-pressure nozzles uniformly distributed on an annular gas distribution disc are adopted in the crushing area; the grading area is provided with a flow dividing cylinder and a conical flow guide plate for separating ascending airflow and falling coarse particles; the control module collects particle size data of powder in real time, predicts future particle size distribution in combination with an LSTM network, dynamically optimizes the rotating speed of a grading impeller through a particle swarm algorithm, and achieves cooperative control over smashing efficiency, particle size precision and energy consumption with the effective output per unit energy consumption as the optimization target. Through low-temperature embrittlement, an anti-pollution structure and an intelligent algorithm, the problems that traditional equipment is high in energy consumption, extensive in particle size control and prone to contaminating materials are solved, and the device is suitable for fine smashing of high-purity or high-hardness materials.

The invention relates to high-adaptability jet mill equipment, which comprises a jet mill body, which comprises a sorting cavity and a crushing cavity which are communicated up and down; the crushing mechanism comprises a plurality of crushing nozzles which are uniformly distributed; the grading wheel is arranged in the sorting cavity, and one end of the grading wheel is in transmission connection to the output shaft end of the corresponding grading motor; the unblocking mechanism comprises a supporting ring plate fixedly connected to the inner side of the middle of the spacer and a supporting shaft fixedly connected to the center of the fixing plate, a supporting piece is installed at the end of the supporting shaft through a one-way bearing, and the outer end of the supporting piece movably abuts against the supporting ring plate; and the outer end part of the supporting piece is fixedly connected with an elastic shifting piece of which the two sides extend to the space between the two adjacent spacers. The grading wheel can be effectively and automatically cleaned and discharged, so that the grading wheel is effectively prevented from being obviously blocked for a long time, materials meeting the particle size can be continuously, effectively and smoothly output, and then the crushing efficiency of the materials is assisted to be improved.

The preparation method comprises the following steps: firstly, uniformly stirring and mixing synthetic fluorophlogopite, silica, polymethylsilsesquioxane, boron nitride, bismuth oxychloride, zinc stearate, aluminum starch octenylsuccinate, mica, aluminum oxide, hydrolyzed sodium hyaluronate and toner in a stirring homogenizer; then uniformly mixing polydimethylsiloxane, octyldodecanol stearoyloxy stearate, isoamyl laurate, diisostearyl malate, phenoxyethanol and caprylyl glycol, and heating to 45 + / -5 DEG C; pouring the mixture into an oil spraying barrel of a stirring homogenizer, uniformly stirring and mixing while spraying oil, crushing, then carrying out airflow crushing, sieving the material, putting the sieved material into a mold plate, and carrying out compression molding, so as to obtain a pressed powder block; and putting the mixture into a packing material powder box to obtain the make-up fixing and brightening pressed powder. The pressed powder is prepared by adding an airflow crushing process, the particle size of the powder is smaller, the powder is dispersed more uniformly, the powder is pressed into the solid pressed powder, and the phenomenon of powder flying is well reduced while makeup fixing and brightening effects are achieved.

The utility model discloses a superfine powder jet mill which comprises a base, a crushing tank, a crushing component and a feeding component, and the crushing tank is mounted above the base. The crushing assembly is arranged, under the arrangement of a blocking net, materials are prevented from falling to the position close to a supersonic nozzle, crushing of the supersonic nozzle is affected, or the supersonic nozzle is blocked, the height of a cleaning brush and the height of an air nozzle can be adjusted through an electric push rod, and under the arrangement of the cleaning brush and the air nozzle, a grading rotor can be cleaned; under the arrangement of an air compressor and a supersonic nozzle, the materials entering the crushing tank are accelerated to impact and collide with crushing teeth repeatedly, superfine crushing of the materials is achieved, a first motor is used for driving a worm to rotate, the worm rotates to drive a worm gear to rotate, the worm gear rotates to drive a vertical rod to rotate, and the vertical rod rotates to drive the grading rotor to rotate; and the vertical rod rotates to drive the crushing wheel to rotate, and under the cooperation of crushing teeth, the materials are efficiently and fully crushed, so that the overall processing efficiency is improved.

The invention belongs to the technical field of silicon dioxide delustering agents for coatings, and particularly relates to a preparation method of silicon dioxide for delustering paint with elastic hand feeling, which comprises the following steps: S1, preparing water glass and a sulfuric acid solution; s2, adding cationic and nonionic aqueous dispersants and a silane coupling agent into water glass, and then adding sulfuric acid to form silicon dioxide silica sol; s3, carrying out acid-base regulation, heating and boosting aging, aging generation and other steps to generate precipitated silicon dioxide; and S4, washing the precipitated silicon dioxide with pure water, an ammonium salt aqueous solution and pure water in sequence, drying, and carrying out wax powder treatment and crushing through a high-temperature jet mill to obtain the product. The silicon dioxide for delustering of the elastic paint has the advantages of large pore volume, small bulk density, small particle size, uniform distribution and easiness in dispersion, has the advantages of good delustering property and good hand feeling when being used in the elastic paint, and is easy to industrialize.

The invention relates to the technical field of jet milling, in particular to a jet milling control method for a fluidized bed jet mill. The method comprises the following steps: acquiring the scattered particle weight increment of large particles and the fine weight increment of fine particles between adjacent sampling moments; dividing into an initial increasing stage and a uniform increasing stage according to the numerical value change of the weight increment of the scattered particles at the maximum value position; in the initial increasing stage, the retention degree is determined according to the trend change of the small weight increment; the drag force degree is determined according to the numerical comparison of the fine weight increment and the granular weight increment in the initial increasing stage and the uniform increasing stage; and determining an adjustment coefficient of the jet milling pressure by combining the retention degree and the drag force degree at the current moment, and regulating and controlling the jet milling pressure at the current moment according to the adjustment coefficient. The airflow crushing pressure can be adjusted and controlled more objectively and reasonably, and the airflow crushing efficiency is effectively improved.

The invention relates to the technical field of jet mills, in particular to a jet mill for azodicarbonamide production, which comprises a base, the upper end of the base is fixedly connected with a top plate, the upper surface of the top plate is fixedly connected with a stock bin, and the lower end of the stock bin is fixedly connected with a spiral feeder body. The spiral feeder body is fixedly connected to the lower surface of the top plate, the interior of the base is fixedly connected with a high-pressure air inlet machine body, the upper end of the base is fixedly connected with a smashing device, and the smashing device comprises a sealing bin. According to the invention, through slow and uniform rotation of the air pipe and the high-pressure nozzles, material particles are in the crushing chamber, because high-speed air flows ejected by the plurality of high-pressure nozzles converge, and the material particles violently collide with each other at the intersection, the impact force generated by the collision is enough to crush the material particles, and finally the material particles enter the classifier body; and then the powder is discharged from the discharge port and enters the next process, so that the crushing efficiency is improved.

The invention relates to the technical field of graphene processing, and particularly discloses a nano graphene powder preparation method which comprises the following steps: weighing a graphite raw material; opening a discharge valve of the feeding cabin, and feeding the graphite raw material into the pressure stabilizing cabin; a graphite raw material is sucked into a first-stage jet mill high-pressure cabin from a pressure stabilizing cabin, first-stage jet milling is conducted, and a first-stage abrasive material is obtained; the first-stage grinding material with the thickness not larger than 10 micrometers is conveyed to a second-stage jet mill high-pressure cabin; processing the first-stage abrasive material by a second-stage jet mill high-pressure cabin to obtain a second-stage abrasive material; the second-stage grinding material with the thickness not larger than 100 nanometers is conveyed to a flow energy depolymerization cabin; the flow energy depolymerization cabin is used for processing the secondary grinding material, and nano graphene powder is obtained through screening; the high-purity graphite raw material is processed through a three-stage gradient processing framework, a negative feedback regulation scheme is introduced in each processing link, the quality of products in different stages is controlled, a progressive processing technology is constructed, and the product rate is greatly increased.

The invention discloses a rare earth reduction regulation and recovery method for high-cerium-content sintered neodymium-iron-boron waste, and belongs to the field of neodymium-iron-boron waste recovery. Performing hydrogen explosion on the magnet subjected to surface treatment to obtain hydrogen explosion coarse powder; carrying out jet milling on the hydrogen explosion powder to obtain jet milled powder; fully mixing the airflow fine powder with a small amount of light rare earth element supplements, and carrying out orientation compression, sintering and tempering to obtain a single-phase sintered regenerated magnet; and carrying out grain boundary diffusion on the obtained regenerated sintered magnet by using a diffusion source containing a small amount of medium rare earth Nd, Pr or alloy thereof to obtain the high-performance regenerated magnet. According to the method, a small amount of light rare earth is added to inhibit the second phase, and then high-performance regeneration of the magnet waste is achieved through grain boundary diffusion of reduced rare earth elements such as Nd and Pr and alloy. The regenerated magnet prepared by the method is lower in total rare earth content, higher in light rare earth content, and better in residual magnetism, coercive force and comprehensive magnetic energy product.

The invention belongs to the field of cement concrete, and particularly relates to an integrated cementing material special for ultra-high performance concrete and a preparation method of the integrated cementing material. The integrated cementing material comprises fly ash, slag powder, carbide slag, semi-hydrated gypsum, silica fume, a powder reinforcing agent, calcium nitrate and sodium silicate. The production process of the integrated cementing material comprises the following steps: winnowing ultrafine microbeads from fly ash, grinding solid waste powder by a fluidized bed type jet mill, chemically strengthening the powder reinforcing agent, chemically nucleating calcium nitrate and sodium silicate, and mixing the integrated cementing material. The ultra-high performance concrete cementing material is prepared from a high-activity solid waste material, the viscosity of a mixture is reduced by winnowing ultrafine micro-beads, the strength of the cementing material is improved by synergistic reaction of slag powder, carbide slag and semi-hydrated gypsum, and a C-S-H crystal nucleus is formed by chemical reaction of calcium nitrate and sodium silicate to provide active sites, so that the cementing material is prepared. And the cementing material is prepared by combining powder chemical dispersion and integrated mixing, so that the carbon emission and production difficulty of the ultra-high performance concrete are remarkably reduced.

The invention belongs to the technical field of extraction and purification of plant components, and relates to a low-temperature freezing vacuum drying nano processing method for extracting anthocyanin from purple corn, in particular to a method for extracting anthocyanin from corn kernels, cores, straws, roots and stigmas of purple corn. The processing method comprises the steps of pretreatment, concentration, hydroxyl radical treatment, quick freezing, nano crushing and the like. A hydroxyl radical treatment method is adopted, so that harmful substances such as pesticide residues can be efficiently, quickly and thoroughly removed; the effect of extracting the anthocyanin from corn kernels, roots, cores, stems and stigma of purple corn by adopting a low-temperature freezing vacuum drying technology is remarkable, the purification rate is high, and the anthocyanin containing 99% of biological activity is achieved. The nanoscale anthocyanin is processed by adopting jet mill equipment and can be conveniently absorbed by a human body and widely applied to various fields.

The jet mill capable of removing static electricity according to the present invention is characterized in that: when a raw material is fed into a hollow grinding main body through a predetermined feeding pipe from a feeding part, and the raw material fed into the grinding main body is filled to a certain height or more, the static electricity is removed; the raw materials collide with each other and are pulverized by strong jet air jetted from an air nozzle provided in the grinding body, and the jet mill removes static electricity inside the grinding body by grounding an upper portion and a lower portion of the grinding body.

The utility model relates to the technical field of powder conveying, and discloses an airflow mill. The airflow mill comprises a shell, an air pipe, an exhaust assembly and a screening assembly. A cavity is formed in the shell; a feeding hole and a discharging hole are formed in the shell, and both the feeding hole and the discharging hole are communicated with the cavity; the exhaust assembly is arranged at the end, close to the discharging opening, of the shell. The screening assembly comprises a screen and a magnet exciting coil. The screen is installed in the cavity and is blocked between the feeding port and the discharging port, the magnet exciting coil is arranged on the outer side of the shell in a surrounding mode, the magnet exciting coil corresponds to the screen in position, and the magnet exciting coil is used for being powered on to generate a magnetic field so that the screen can have magnetism. The screen is arranged between the feeding port and the discharging port in the cavity for blocking, the magnet exciting coil surrounds the position, corresponding to the screen, of the outer side of the shell, the screen has magnetism through the magnet exciting coil, then magnetic particles are adsorbed in the material screening process, demagnetizing operation is conducted on smashed materials, and the magnetic heterogeneity of the smashed materials is reduced.

The utility model relates to the technical field of jet mills, in particular to an anti-caking jet mill. The technical problems that when a traditional jet mill is used for grinding magnetic powder raw materials, magnetic powder particles have certain magnetism and can be extruded to generate agglomeration in the grinding process, and therefore normal machining of the magnetic powder is affected are solved. According to the technical scheme, the anti-caking jet mill comprises a tank body, a material guiding assembly, a separating assembly, a connecting assembly, a rotating assembly, a stirring assembly and a supporting assembly; compared with a traditional jet mill which is used for grinding magnetic powder raw materials, the magnetic powder can be extruded to generate agglomeration, so that the normal processing of the magnetic powder is influenced, the device is used for continuously stirring the crushed magnetic powder in the magnetic powder crushing stage to prevent the magnetic powder from being agglomerated, so that the magnetic powder can be effectively processed, and the magnetic powder can be effectively processed. The stirring structure is used for stirring the magnetic powder in the stage of guiding out the separated magnetic powder so as to prevent the magnetic powder from being extruded and agglomerated, so that the anti-magnetic powder extrusion and agglomeration treatment on the jet mill is realized.

The invention relates to the field of asphalt production, and particularly discloses a preparation method of warm-mixed modified asphalt based on coal liquefaction oil residues, which comprises the following steps: S1, raw material pretreatment: pre-crushing the coal liquefaction oil residues until the particle size is less than or equal to 5mm, then refining the coal liquefaction oil residues to 200 meshes through an airflow mill, and then drying and dehydrating the coal liquefaction oil residues; the preparation method comprises the following steps: freezing SBS in a liquid nitrogen environment of-30 DEG C, and crushing the frozen SBS into 0.5-1mm particles by a hammer crusher; s2, pre-mixing the composite modifier by stages: in the first stage, adding the coal liquefaction oil residue, the aromatic oil and the rubber powder into a high-speed stirrer at 80 DEG C, and stirring; according to the preparation method of the warm-mixed modified asphalt based on the coal liquefaction oil residues, through the coal liquefaction oil residue superfine activation and SBS cryogenic grinding technology, the interfacial activity of the raw materials is improved, solid waste resource utilization is achieved, the modification cost is reduced, and meanwhile, by combining staged temperature control mixing and dissolving with the ultrasonic-assisted dispersion technology, the warm-mixed modified asphalt is prepared. The high-temperature rutting resistance and the water stability of the composite modified asphalt are improved.

The utility model relates to the technical field of mixing equipment, in particular to a powder tank butt joint mechanism which comprises a supporting frame fixedly connected to a support, the supporting frame is located between a traveling crane and the support and used for supporting a powder tank, and a limiting opening allowing the powder tank to be clamped in is formed in the side, away from the support, of the supporting frame. And the limiting opening is aligned to a feeding opening of the jet mill. The device has the effects that the situation that the powder tank shakes on the crane sling is improved, and the butt joint stability of the powder tank and the jet mill is improved.

The invention discloses porous alumina as well as a preparation method and application thereof, and relates to the technical field of porous materials. The preparation method comprises the following steps: firstly, carrying out hydrothermal reaction on aluminum hydroxide slurry containing aluminum hydroxide, aluminum oxide seed crystal and a dispersing agent, enabling porous aluminum oxide precursor slurry obtained by the hydrothermal reaction to be in an alkaline environment, adjusting the pH value of the slurry to 7.0-8.5 through acid adjustment, and then carrying out solid-liquid separation, calcination and other processes. Aluminum ions in the solution can be washed away in the solid-liquid separation (such as filter pressing) process through the acid adjusting process, large-particle single crystals in the porous aluminum oxide precursor are reduced, the obtained porous aluminum oxide precursor is uniform in crystal size, and the monodisperse porous aluminum oxide precursor is prepared through the synthesis section. And after subsequent calcination, the morphology is regular, the particle size distribution is narrower, and the monodisperse porous alumina powder can be obtained only through agglomeration formed by ultrafine scattering and calcination of the jet mill.

The invention belongs to the technical field of grinding equipment, and discloses a high-energy jet mill with a pressurizing structure, the high-energy jet mill comprises a base and a fixing plate, the fixing plate is fixedly mounted at the top of the base, a grinding bin is fixedly mounted in the fixing plate, and a first ventilation pipe is fixedly mounted on the outer wall of the grinding bin; and a main airflow pipe is fixedly mounted on the inner wall of the grinding bin. When the two sets of pressurizing bins conduct airflow supply operation, the other two sets of pressurizing bins can compress air in the pressurizing bins through piston movement of piston rods, so that when a pressurizing airflow pipe is aligned with the pressurizing bins, the compressed air can improve the contact pressure between airflow grinding materials and the surface of a machined material, the speed of pressurized airflow is higher, and the working efficiency is improved. Compared with the prior art, the impact frequency on the surface of the machined material is larger, the machining time can be remarkably shortened, the production efficiency is improved, the production cost is reduced, and more importantly, the grinding effect of the material is better, and grinding is more thorough.

The utility model relates to a target type jet mill which comprises a cylindrical barrel, and a fine powder channel and a coarse powder channel are formed in a grading chamber; the powder grader is mounted in the grading chamber, and a powder outlet of the powder grader is connected with the fine powder channel; the powder supply device is connected with the powder feeding chamber and is suitable for feeding powder into the powder feeding chamber; the powder spraying pipe is installed on the barrel of the powder crushing chamber, an inlet of the powder spraying pipe is connected with a first Venturi powder pump, and a powder return pipe is connected between the first Venturi powder pump and the coarse powder channel. The particle size of the separated crushed powder can be controlled through the powder grader, selection control is carried out in a large particle size range, fine powder meeting the set requirement is discharged from the fine powder channel, coarse powder is collected for centralized treatment while the fine powder is discharged and collected in time, and therefore the powder quality is improved. Coarse powder enters the second Venturi pump through the coarse powder channel and is sprayed out again to be smashed, and the smashing efficiency and quality are improved.

The utility model relates to a jet mill for a sodium ion battery positive electrode material, which comprises a shell, a grading chamber and a jet milling chamber which are arranged up and down are formed in the internal space of the shell; at least two input ports and at least two output ports are formed in the side wall of the grading chamber, and a feeding port is formed in the lower portion of the grading chamber. The side wall of the airflow crushing chamber is provided with a plurality of mounting ports and is provided with a first high-pressure nozzle, and the bottom of the airflow crushing chamber is provided with a cleaning port and is provided with a second high-pressure nozzle; each grading assembly comprises a horizontally-arranged grading wheel and a discharging barrel, a valve is arranged at the other end of each discharging barrel, and each valve is in fluid communication through a pipeline so as to control discharging of the crushed materials. The second high-pressure nozzles raise bottom sediment materials so that the bottom sediment materials can be normally smashed, through valves arranged on the grading assemblies, when one grading assembly breaks down, the valve of the corresponding grading assembly can be closed, other grading assemblies can work normally, and normal production is not affected.

A process for the direct recycling of electrode scrap generated as production waste during the production of lithium-ion batteries is to be developed that enables the recycling of electrode scrap from LIB production through mechanical stressing without adversely altering the active materials, so that it can be returned to production. This is achieved by mechanically stressing the electrode scrap, comprising pre-crushing the electrode scrap into bulk material and subjecting the pre-crushed electrode scrap to mechanical stressing in a conditioned atmosphere in a fluidized-bed counter-jet mill.

The invention discloses an airflow crushing system and an airflow crushing method thereof, and belongs to the technical field of material pulverization. The airflow crushing system comprises an airflow crusher, a gas-solid separation device, an exhaust fan and an air supply fan, and a raw material inlet of the airflow crusher communicates with an air outlet of the air supply fan; a powder outlet of the jet mill is communicated with a feed port of the gas-solid separation equipment, and an exhaust port of the gas-solid separation equipment is communicated with an air inlet of the exhaust fan. The airflow crushing method comprises the steps that the airflow crusher crushes materials into powder, the powder is discharged into the gas-solid separation equipment to be separated, the exhaust fan pumps out gas in the gas-solid separation equipment, the gas supplementing fan supplements the gas into the airflow crusher, the exhaust fan and the gas supplementing fan are matched to maintain the pressure in the airflow crusher to be stable, a large amount of fine powder is prevented from being generated, and the crushing efficiency is improved. And the powder is discharged into gas-solid separation equipment in time, so that over-crushing is avoided, the qualification rate is increased, and the energy loss is reduced.

The invention relates to a target jet mill which comprises a cylindrical barrel, and a fine powder channel and a coarse powder channel are formed in a grading chamber; the powder grader is mounted in the grading chamber, and a powder outlet of the powder grader is connected with the fine powder channel; the powder supply device is connected with the powder feeding chamber and is suitable for feeding powder into the powder feeding chamber; the powder spraying pipe is installed on the barrel of the powder crushing chamber, an inlet of the powder spraying pipe is connected with a first Venturi powder pump, and a powder return pipe is connected between the first Venturi powder pump and the coarse powder channel. The particle size of the separated crushed powder can be controlled through the powder grader, selection control is carried out in a large particle size range, fine powder meeting the set requirement is discharged from the fine powder channel, coarse powder is collected for centralized treatment while the fine powder is discharged and collected in time, and therefore the powder quality is improved. Coarse powder enters the second Venturi pump through the coarse powder channel and is sprayed out again to be smashed, and the smashing efficiency and quality are improved.

The invention discloses a shoe sole waste circulating device for shoe manufacturing, and relates to the technical field of clothing production, the shoe sole waste circulating device comprises a shell and a crushing mechanism, the crushing mechanism comprises a crushing roller and an arc-shaped sieve, the crushing roller is rotatably connected with the inner side wall of the shell, the arc-shaped sieve is fixedly connected with the inner side wall of the shell, and a conical sieve is arranged below the bottom end of the arc-shaped sieve; fixing plates are arranged on the two sides of the conical sieve. Through cooperation of the smashing roller and the arc-shaped screen, waste can be accurately cut into specific particle sizes, secondary screening is conducted in combination with the conical screen, the waste with the qualified particle sizes directly falls into the bin, through the design of the material returning mechanism, the waste which is not fully cut can automatically return to the smashing mechanism to be treated again, the smashing degree of the waste is effectively improved, and the labor intensity of workers is reduced. And it is ensured that all the finally obtained waste particles can meet the feeding requirement of a subsequent jet mill, and the waste treatment quality and efficiency are greatly improved.

The invention belongs to the technical field of magnetic materials, and particularly relates to a preparation method of anisotropic samarium-iron-nitrogen permanent magnet powder. The preparation method of the anisotropic samarium-iron-nitrogen permanent magnet powder comprises the following steps that (1) a single-phase Sm2Fe17 alloy cast ingot is sequentially subjected to coarse crushing and jet mill smashing, and samarium-iron alloy powder is obtained; (2) nitriding the samarium-iron alloy powder in a plurality of temperature sections; (3) grinding the samarium-iron alloy powder subjected to nitriding treatment by using a sand mill; the temperature of the nitriding treatment is 350-520 DEG C, the nitriding treatment is divided into 2-5 temperature sections, and the temperature is increased in sequence. By regulating and controlling the oxygen content, the particle size and nitriding treatment process parameters of the samarium-iron alloy powder before nitriding treatment, full nitriding of the samarium-iron alloy powder is achieved, and the samarium-iron-nitrogen permanent magnet powder with good magnetic performance is obtained.

To provide aluminum nitride powder excellent in wettability with polymer materials such as resin.SOLUTION: The aluminum nitride powder has an oil absorption amount of 13.5 g / 100 g or less based on a refined linseed seed oil method in accordance with JIS K5101-13-1:2004. The aluminum nitride powder has a median diameter (D50) of 1.5 to 10 μm and a rising tangent angle of 45° or more on the small diameter side of the particle size distribution curve. A method for modifying aluminum nitride powder comprises classifying aluminum nitride powder by a dry jet mill.SELECTED DRAWING: Figure 4

The utility model relates to the technical field of material grinding equipment, in particular to a vortex target type jet mill device which comprises a grinding module and a grading module, the grinding module comprises an annular inner target lining and an annular outer target lining, a grinding channel is formed between the inner target lining and the outer target lining, and target teeth are arranged on the opposite side faces of the inner target lining and the outer target lining; the outer target lining is connected with a plurality of guniting pipes; a grading chamber of the grading module communicates with the grinding channel through an ascending pipeline, and the grading chamber is connected with a fine powder suction pipe. During use, slurry enters the grinding channel at a high speed through the slurry spraying pipe and collides with the target teeth on the side walls of the inner target lining and the outer target lining, and therefore the target type jet mill function that the slurry collides with the target teeth to be broken is achieved; in addition, the slurry collides with the target teeth and rebounds, and the rebounded slurry collides with the newly sprayed slurry, so that the collision type airflow milling effect of the relative collision of slurry particles is achieved; and particle swirling flow carried by steam is generated by the wall attachment effect of the fluid slurry, so that the effect of a vortex mill is also achieved.

The invention relates to the technical field of neodymium iron boron powder preparation, in particular to jet mill equipment for preparing neodymium iron boron metal powder. According to the device, the pneumatic device provides pneumatic power, materials are fed from the feeder and then enter the grinding chamber to be ground into fine powder, the fine powder is discharged from the grinding discharging port, filtered through the grinding filtering device and enters the cyclone separator to be subjected to superfine powder separation, and the fine powder is collected into the discharging barrel; the powder which does not meet the collection standard is recycled through a filtering device; in the device, whether neodymium iron boron metal powder is left or not can be observed through a transparent protective cover of the grinding and filtering device, if yes, the device can be conveniently disassembled to take out the left neodymium iron boron metal powder, then the grinding and filtering device is installed, and therefore safe operation of the device is guaranteed.

The invention belongs to the technical field of brominated flame retardant synthesis, and particularly provides a decabromodiphenyl ethane bromine distillation process chlorination bromine removal process, which comprises the following steps: S1, adding bromine into a reaction kettle, adding a catalyst, and mixing; cooling and dropwise adding molten diphenylethane; then heating, carrying out a heat preservation reaction, and cooling to obtain a brominated crude product; s2, S201, adding the brominated crude product obtained in S1 into a bromine steaming kettle, and heating; s202, chlorine is introduced, and the total amount of bromine and chlorine is detected; carrying out segmented control on the introduced chlorine according to the total amount of bromine and chlorine; s203, when the total amount of bromine and chlorine is reduced to a threshold value, stopping introducing chlorine, standing, cooling, and introducing nitrogen; s3, filtering the feed liquid in the bromine steaming kettle, washing and purifying for three times, and finally, centrifugally dewatering to obtain a faint yellow solid; and S4, adding the faint yellow solid into a high-temperature jet mill, performing high-temperature aging to obtain white powder, and then performing jet milling on the white powder to obtain a finished product. Physical distillation is replaced by chemical replacement, so that bromine is highly separated.

The invention aims to provide a preparation process of a bipolar plate of a flow battery, and the bipolar plate is a composite material, has the characteristics of high conductivity and high toughness, and has better mechanical property and liquid resistance. The preparation method comprises the following steps: mixing a conductive carbon material, a resin material and a liquid assistant in a pulverizer, an emulsifying machine, a ball mill or a jet mill, then coating the mixture on the surface of a matrix, and drying, hot-pressing and separating to obtain the bipolar plate. The specific scheme is as follows: step 1, material mixing: preparing a carbon conductive material and a resin material according to a specific mass ratio; putting the prepared materials into a high-speed dispersion machine, an emulsifying machine, a ball mill or a jet mill for mixing to form a mixture; step 2, coating a base body layer, namely coating the mixture on the base body through an extruding machine, a molding press, a coating machine or a spraying machine; and 3, performing hot-pressing separation: performing hot-pressing on the coated substrate layer, and then separating from the substrate layer to prepare the bipolar plate.