323 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 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 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 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 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.

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.

The utility model provides a silicon powder processing production line which comprises a main processing line, a first auxiliary processing line and a second auxiliary processing line, wherein the first auxiliary processing line and the second auxiliary processing line are communicated with the main processing line; the main processing line comprises a raw material bin, a first jaw crusher, a first surge bin, a first roll crusher, a second surge bin and a rocking screen which are sequentially communicated, and the first auxiliary processing line comprises a third surge bin and a first finished product bin which are sequentially communicated; the second auxiliary processing line comprises a fourth surge bin, a jet mill and an airflow classifier which are communicated in sequence, a first discharging port of the airflow classifier is communicated to a cloth bag dust collector, and a second discharging port of the airflow classifier is communicated to a feeding port of the swinging screen through a fifth bucket elevator and an eighth conveyor. Through the mode, silicon powder particles are repeatedly ground, the particle uniformity in the silicon powder crushing process is improved, and the silicon powder processing yield and recovery rate are effectively improved.

The utility model relates to a fluidized bed jet mill which comprises a cylinder body, a fine powder channel, a powder classifier, a powder supply device, at least one pair of powder spray pipes, a fine powder channel, a fine powder channel, a fine powder channel, a fine powder channel, a fine powder channel, a fine powder channel, a fine powder channel, a fine powder channel, a fine powder channel, a fine powder channel, a fine powder channel and at least one pair of powder spray pipes, the powder spraying pipes are installed on a barrel of the crushing chamber, outlets of each pair of powder spraying pipes are oppositely arranged in the crushing chamber in the radial direction, inlets of the powder spraying pipes are connected with the first Venturi powder pumps respectively, and coarse powder returning pipes are connected between powder inlets of the first Venturi powder pumps and the coarse powder channel. Therefore, coarse powder separated from the grading chamber is crushed in the crushing chamber. Coarse powder mixed with high-pressure airflow collides in the crushing chamber through the powder spray pipe, so that collision is targeted, only coarse powder is beaten, the crushing efficiency is improved, the crushing effect is greatly improved, and the particle size of the powder is effectively controlled.

The present invention addresses the problem of providing a method for producing a flaked graphite dispersion having high dispersibility of flaked graphite. This method for producing a flaked graphite dispersion comprises: a first step in which a material to be treated, which contains one selected from the group consisting of graphite and a graphite compound, and a first organic solvent other than an amide-based solvent, a ketone-based solvent, or a sulfoxide-based solvent, is subjected to a wet jet mill treatment to obtain flaked graphite; and a second step in which the product obtained in step 1 is mixed with at least one specific solvent selected from the group consisting of an amide-based solvent, a ketone-based solvent, and a sulfoxide-based solvent to obtain a flaked graphite dispersion.

Disc airflow mill relates to airflow mill structure technical field, including disc cavity shell, coaxial fixed ring is equipped with in disc cavity shell, and the cavity of disc cavity shell is divided into gas cavity and crushing cavity from outside to inside by fixed ring, the circumference wall of fixed ring is surrounded with several channels which are inclined to the radial direction of disc cavity shell, and the nozzle is detachably connected in the channel. The utility model solves the problems of the prior art in the prior art, the setting position of the feed inlet is limited, the high-speed airflow with material is easy to damage the crushing airflow in the crushing cavity, and the crushing efficiency is affected; and the nozzles are mostly conical threads, which are screwed on the cavity wall, the conical thread processing is difficult, the nozzle is a consumable part, the replacement cost is high, and the cavity wall is a circular arc surface, which is difficult to process a conical thread hole on the circular arc surface.

The utility model relates to the technical field of abrasive material production and processing, and discloses a crusher structure and a jet mill, which comprise a crushing chamber and an auxiliary structure, the crushing chamber is in the shape of a hollow cylinder, the side wall surface of the crushing chamber is fixedly connected with an air pipe, the air pipe is in the shape of a circular tube, and the auxiliary structure is arranged in the cavity of the crushing chamber and used for guiding materials. The auxiliary structure comprises multiple air entraining plates, multiple material entraining plates and multiple flow guide blocks, the air entraining plates are detachably installed in a cavity of the crushing chamber, the material entraining plates are also detachably connected in the cavity of the crushing chamber, the flow guide blocks are fixedly connected to the wall faces of the material entraining plates, and the multiple air entraining plates and the multiple material entraining plates are arranged in the cavity of the crushing chamber in an annular array mode; the auxiliary structure accelerates the grinding efficiency of the materials by guiding the materials to be directly mixed with the high-speed air flow, so that the time required for grinding is effectively shortened, and the scheme has higher working efficiency compared with the prior art.

Process for grinding waxes and producing wax powders - with an average particle size d 50 of less than 10 µm or - with an average particle size d 90 of less than 15 µm or - both comprising the step of bringing a wax as millbase into contact with at least one polyol as milling aid and milling in a jet mill, a) wherein the polyol is added at a concentration of 0.01 to 5.0 wt.% based on the sum of grinding aid and mill base during the milling process, b) wherein the wax powder contains the polyol in an amount of 0.01 to 5.0 wt.%, based on the total of wax powder including polyol in the wax powder, c) wherein the wax powder consists of more than 97.5% by weight exclusively of wax(es) and polyol(s), and d) wherein the polyol has 2 to 12 carbon atoms, optionally 1 ether group per molecule, and at least 2 free hydroxy groups per molecule.

This invention discloses a dust removal device for an air jet mill used in bactericide production, relating to the field of bactericide production technology. It includes a filter chamber and a feeding chamber, and further includes: a dust removal mechanism disposed inside the filter chamber; and a pulse cleaning mechanism disposed on the top surface of the filter chamber. The dust removal mechanism includes a sealing partition, a movable tube, a filter bag, a revolution unit, a rotation unit, and a locking component. Through the coordinated operation of a driven gear, a driving gear, a second drive motor, a support plate, a sliding column, a movable groove plate, a sliding groove, and a pulse tube, the second drive motor can be periodically activated during the filtration process. Through the meshing transmission of the driving gear and the driven gear, and the intermittent engagement of the sliding column and the sliding groove, each movable tube drives the corresponding filter bag to rotate independently and intermittently, allowing multiple filter surfaces of each filter bag to rotate sequentially to the air inlet side, achieving the effect of evenly utilizing the entire outer circumference of a single filter bag.

This invention discloses a method for preparing sheet-like nano-sized cobalt hydroxide. The method includes the following steps: using cobalt nitrate as the cobalt source and sodium hydroxide solution as the precipitant, a co-precipitation reaction is carried out. The cobalt nitrate solution and sodium hydroxide solution are added together to a reaction vessel. By controlling the synthesis pH and temperature, the synthesized cobalt hydroxide slurry is washed with hot pure water, dried, and crushed using an air jet mill to obtain sheet-like nano-sized pink cobalt hydroxide with low sodium content. Specifically, the key to preparing sheet-like nano-sized cobalt hydroxide is to prevent oxidation and particle agglomeration during the synthesis process. This invention uses a low-temperature (40-60℃), low-pH (8.0-9.0) cobalt hydroxide synthesis process with a small amount of antioxidant added to prepare sheet-like micron-sized cobalt hydroxide that is not easily oxidized or agglomerated. In addition, at the low pH, the sodium content is low, making the subsequent filtration and washing steps easier to operate.