28 results about "Jet mill" patented technology

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.

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.

This invention discloses a method for preparing aluminum nitride powder, comprising the following steps: S1: Selecting spherical aluminum powder with a purity ≥99.9% and pre-treating it; S2: Spreading the pre-treated aluminum powder evenly in a boron nitride crucible, with a layer thickness ≤5mm to avoid incomplete internal reaction; S3: Placing the crucible in a tube furnace and purging the furnace with high-purity nitrogen to replace the air inside; S4: Heating the aluminum powder treated in S3 in stages for nitriding, and then cooling it for later use; S5: The cooled powder exhibits agglomeration, so it is lightly dispersed using an air jet mill and then sieved; S6: Immersing the powder again in 10% hydrochloric acid for 100-120 minutes, washing it with water until neutral, and then vacuum drying to obtain aluminum nitride powder. This invention utilizes dilute hydrochloric acid of different concentrations to immerse the aluminum nitride twice, which removes the aluminum oxide film on the surface of the aluminum powder. By destroying the oxide film on its surface, the nitriding reaction is hindered, effectively preventing the aluminum powder from melting and sintering to form large particles.

This utility model discloses a grinding mechanism for an air jet mill, belonging to the field of air jet mill technology. It includes a grinding cylinder with multiple crushing mechanisms on its side, multiple air blowing pipes fixedly connected to the side of the grinding cylinder, a conveying pipe fixedly connected to the side of the grinding cylinder, a storage hopper fixedly connected to the top of the conveying pipe, and an arc-shaped mesh fixedly fitted to the top of the conveying pipe. In this utility model, when grinding lithium iron phosphate, the heating plate is energized, causing the conveying pipe to generate heat. Simultaneously, a first motor drives a spiral conveyor rod to rotate, using the spiral conveyor rod to guide the lithium iron phosphate from the storage hopper into the inner cavity of the grinding cylinder through the conveying pipe. The heat from the conveying pipe simultaneously heats and dries the lithium iron phosphate, causing the generated water vapor to dissipate to the outside through the arc-shaped mesh, ensuring the lithium iron phosphate remains dry and thus guaranteeing the quality of the lithium iron phosphate air jet mill.

This invention relates to the field of neodymium iron boron (NdFeB) magnet technology, specifically to a NdFeB magnet and its preparation method, comprising the following preparation steps: S1. Melting the alloy matrix and modified auxiliary alloy separately in a vacuum induction melting furnace, casting them into thin sheets to obtain a main phase alloy casting and a modified auxiliary phase alloy casting; S2. Mixing the main phase alloy casting and the modified auxiliary phase alloy casting, crushing them into coarse powder, and then pulverizing them into fine powder in an air jet mill; S3. Uniformly spraying the powder modifier onto the flowing magnetic powder through an atomizing nozzle at the discharge port, mixing them, magnetizing and oriented them in a directional magnetic field, pressing them, and then cold isostatically pressing them to obtain a green blank; S4. Sintering the green blank, holding it at a temperature, and then performing a two-stage tempering treatment to finally obtain the NdFeB magnet. This invention achieves a simultaneous increase in remanence, coercivity, and magnetic energy product through the synergistic effect of the modified auxiliary alloy and the powder modifier, breaking the trade-off between coercivity and remanence in traditional technologies.

The utility model relates to the technical field of airflow pulverizer, especially to a feed device of fluidized bed airflow pulverizer, which comprises a front end feeding assembly, an input assembly and a feed assembly for the fluidized bed airflow pulverizer; the feed assembly comprises a chassis, a circular groove is fixedly installed on the upper side outer ring of the chassis, a rotating column is rotatably installed at the center position of the chassis, a plurality of groups of arc-shaped fan blades are circumferentially and equidistantly installed on the outer wall of the rotating column, a through pipe is fixedly and communicatively installed on the side wall of the circular groove, a fourth flange plate is fixedly connected to the outer side end of the through pipe, a top plate is arranged on the upper side of the circular groove, and a connecting pipe is fixedly and communicatively installed on the upper side of the top plate. The feed assembly is provided, high-speed airflow is utilized to convey the material, the ball body is utilized to drive the fan blades to crush the material during the conveying process, the particle size of the material is reduced, the material is prevented from blocking the pipeline, the subsequent pulverizing work of the fluidized bed airflow pulverizer is accelerated, and the practicability is improved.

The application discloses a jet mill crushing device, which comprises a jet mill, a cyclone separator and a material distribution module, the jet mill is provided with a feeding mechanism and / or a grading wheel, the inlet of the cyclone separator is connected with the outlet of the jet mill, the material distribution module comprises a plurality of material distribution areas; a particle size identification system and a control system, the particle size identification system is used for identifying the particle size of material particles output by the cyclone separator, the control system is used for controlling the feeding mechanism and / or the grading wheel to perform feedback adjustment according to the particle size identification result of the particle size identification system, and is used for controlling the material after particle size identification to enter into corresponding material distribution areas respectively. The jet mill crushing device provided by the application can identify the particle size of the ground material, and can perform feedback adjustment on the jet mill according to the identification result, so that the particle size of the material is stabilized, and the ground material can be classified and collected.

The utility model discloses a pneumatic jet mill, include: the inside left and right through horizontal inner passage's discharge nozzle, the feeder of outside connection in the middle top of discharge nozzle and bottom output end and horizontal inner passage intercommunication, be located in the right -hand end of horizontal inner passage and to horizontal inner passage output compressed air's compressed air nozzle, be located in the left side of discharge nozzle and with the left -hand end of horizontal inner passage opposite's shunt block, and the shaping cylinder of being sleeved in the shunt block periphery and extending along the left and right direction. The utility model discloses a pneumatic jet mill, it is applicable to the production carbon powder, can make carbon powder shape spheroidization in carbon powder crushing process, reduce the production of irregular shape carbon powder, thereby realize the effect of carbon powder shaping in the crushing process, can make carbon powder's shape more round, size more uniform, and further can improve carbon powder's printing quality.

This invention discloses a method for preparing and applying highly dense silver-coated copper powder. The method comprises the following steps: First, in a first solvent, pretreated copper powder, a copper complexing agent, a dispersant, p-benzoquinone, and slow-release microspheres coated with a reducing agent are mixed, and the pH is adjusted to 10-11.5 to obtain a first mixture; then, silver ammonia solution is added, and the reaction proceeds to obtain a second mixture; wherein the redox potential during the reaction is 0.6-0.75V; finally, the second mixture is cooled, washed, and dried, and then processed by an air jet mill to obtain the final product. This method eliminates the need for a complex silver liquid / reducing agent dropwise control system, requiring only temperature and stirring control. The reaction endpoint is determined by monitoring the ORP, which helps reduce operational difficulty and uncertainty in industrial scale-up. Furthermore, the resulting silver-coated copper powder exhibits advantages such as high density and low volume resistivity.

This utility model relates to a powder material pipeline sieving device and an air jet mill feeding device, including a sieving pipe and a vibrating assembly. The sieving pipe includes an upper end cover, a lower end cover, a first flange, and a screen. The upper and lower end covers are connected by the first flange, which also fixes the screen. The vibrating assembly includes a vibrating motor, which is installed on one side of the sieving pipe corresponding to the screen position. The vibrating motor vibrates the screen, and the screen filters the material. The technical solution of this application features a dedicated pipeline sieving device. The screen is fixed by connecting the upper and lower end covers with the first flange. The clamping force of the first flange ensures that the screen edge is evenly stressed, preventing local deformation and breakage, and facilitating installation and disassembly of the screen. Furthermore, by using a vibrating motor to vibrate the screen, the screen filters the material. Compared to existing vibrating screens, it occupies less space and is suitable for most small spaces.

The application provides a powder collector with sterilization function, which comprises an upper chamber arranged above a top plate of a shell, a lower chamber arranged below a bottom plate of the shell, a discharge pipe arranged at a lower end of the lower chamber, an inlet pipe arranged on the upper chamber, an air outlet pipe arranged on a side wall of the shell and connected with an air blower at a terminal end of the air outlet pipe, a plurality of filter pipes arranged through the bottom plate and the top plate of the shell at two ends thereof, the upper ends of the filter pipes being communicated with the upper chamber and the lower ends of the filter pipes being communicated with the lower chamber, a plurality of ultraviolet light tubes arranged in the filter pipes in one-to-one correspondence, the upper ends of the ultraviolet light tubes being arranged through the top of the upper chamber, and a power connector arranged on the top of the ultraviolet light tube. The powder collector is combined with a jet mill to form a powder crushing system. The powder crushing system can sterilize the powder during the collection of the finished powder, so that the quality of the finished powder is improved.

The utility model relates to a kind of airflow pulverizer for micro-nano powder, it is characterized by: including feeding module and airflow pulverizing module;The feeding module is set at the side of airflow pulverizing module, for conveying micro-nano powder to airflow pulverizing module;In the utility model, by setting feeding module at the side of airflow pulverizing module, the conveying of micro-nano powder is carried out using conveying auger, then by setting the structure of pre-pulverization in connecting pipeline, when micro-nano powder enters into connecting channel and falls on breaking net, by air bag cooperation pulse valve release pulse airflow, on the one hand, it can drive impact column to hit breaking net, and the accumulated massive micro-nano powder is broken, on the other hand, the airflow of pulse jet can be quickly blown through breaking net by the powder on breaking net, realize the pre-breaking of micro-nano powder;It is convenient for subsequent airflow pulverizing module to carry out further breaking, so that the breaking effect of micro-nano powder is better.

The application relates to a fluidized bed jet mill. The fluidized bed jet mill comprises a feeding assembly for conveying materials, a crushing assembly, an expansion cavity and a grading assembly. The crushing assembly comprises a crushing cavity which is communicated with the feeding assembly and used for receiving the materials. The crushing cavity is provided with a nozzle for spraying high-speed airflow to crush the materials. The lower end of the expansion cavity is communicated with the top of the crushing cavity, and the at least partial area of the expansion cavity is increased in the flow upward direction, so as to reduce the airflow speed of the materials. The grading assembly is arranged at the upper part of the expansion cavity and used for centrifugal grading of the materials. Through the above arrangement, the expansion cavity with the increased flow area is arranged between the crushing cavity and the grading assembly, so that the possibility of the coarse particles being carried by the airflow to the grading area is fundamentally reduced. Meanwhile, the coarse particle running is inhibited without depending on the rotation speed increase of the grading wheel or the air inlet amount increase, so that the problems of energy consumption increase and equipment stability decrease are avoided.

This disclosure relates to the field of pharmaceutical equipment technology. One embodiment of this disclosure provides an air jet mill with a collection structure for pharmaceutical use, comprising: a separation tank, an exhaust port, a pulverizer, and a connecting pipe. The exhaust port is located at the top of the separation tank, the connecting pipe is located on the pulverizer, the pulverizer is connected to the bottom of the separation tank through the connecting pipe, the discharge pipe is located at the bottom of the separation tank, and a collection and discharge assembly is located inside the separation tank and the discharge pipe. The separation assembly is located at the top inside the separation tank and includes an inner frame, which is fixed inside the separation tank and extends to the outside of the separation tank at one end. A rotating shaft is rotatably connected to the bottom of the inner frame. This technical solution solves the technical problem in the prior art where non-integrated collection systems result in long material transport paths and easy retention of fine particles on the inner wall of the pipe. Especially when processing viscous or hygroscopic drugs, the retained material may absorb moisture and clump, affecting subsequent collection efficiency and powder purity.

This invention provides a sintered cerium-gadolinium-yttrium iron boron permanent magnet, its preparation method, and its application, belonging to the field of permanent magnet technology. The invention uses waste sintered cerium-yttrium iron boron magnets and a mixture of gadolinium and yttrium as hydrogen-crushing raw materials; the hydrogen-crushing raw materials are subjected to hydrogen crushing to obtain coarse cerium-gadolinium-yttrium iron boron powder; the coarse cerium-gadolinium-yttrium iron boron powder is then subjected to air jet milling to obtain fine cerium-gadolinium-yttrium iron boron powder; the fine cerium-gadolinium-yttrium iron boron powder is mixed with air jet mill bottom material and a lubricant to obtain a mixed fine powder material; the air jet mill bottom material is the bottom material generated during the air jet milling process of the coarse cerium-gadolinium-yttrium iron boron powder or the bottom material generated during the air jet milling process of magnets with a magnetic energy product greater than 45 MGOe; the mixed fine powder material is sequentially subjected to orientation molding, sintering, and tempering treatment to obtain the sintered cerium-gadolinium-yttrium iron boron permanent magnet. The method provided by this invention for preparing sintered cerium gadolinium yttrium iron boron permanent magnets enables comprehensive utilization of rare earth resources and results in low production costs.

This utility model relates to the field of air jet mill feeding technology, and discloses an air jet mill uniform feeding device, including a storage bin. A funnel is fixedly connected to the bottom of the storage bin, and a discharge pipe for connecting to the air jet mill is fixedly connected to the bottom of the funnel. A top plate is fixedly connected to the left side of the top of the storage bin. A driving component is installed on the top of the top plate through a fixing frame. A feeding assembly is provided on the inner wall of the right side of the top plate. A dust collection box is connected to the inner wall of the left side of the top plate through an air suction assembly. The left end of the dust collection box is connected to a connecting frame through a baffle. The connecting frame is set on the inner wall of the dust collection box through a sliding tenon. In this utility model, a motor drives a rotating rod to rotate, causing the stirring blade to stir the material to prevent agglomeration. The spiral blade rotates in the discharge pipe to push the material forward, effectively avoiding blockage at the discharge pipe. An air pump generates suction, and the generated dust is sucked into the dust collection box through a guide hood. A filter plate intercepts the dust, and the filtered airflow flows out from the air outlet.

This invention relates to the field of ultrafine coal powder preparation technology, and discloses a method and apparatus for preparing ultrafine coal powder, ultrafine coal powder and its applications, comprising: feeding coal-containing raw materials with a particle size ≤3mm into an air jet mill, and using steam to perform steam grinding of the coal-containing raw materials to obtain coal powder, wherein the pressure of the steam is 0.5-1.2MPa, the temperature is 180-320℃, the gas velocity of the steam entering the grinding chamber of the air jet mill is 360-1200m / s, and the pressure inside the grinding chamber of the air jet mill is -2Kpa-0KPa; feeding the coal powder for sorting, and sending the coal powder that meets the particle size requirement into a bag filter for collection to obtain ultrafine coal powder, wherein the particle size D of the ultrafine coal powder is... 97 With a particle size ≤10μm and a sphericity of 0.5-1, this invention improves the single-machine processing capacity of pulverized coal, and the particle size of the ground pulverized coal can reach 0.1μm, thereby improving working efficiency and overall primary energy efficiency, saving energy and reducing emissions, and lowering production costs. It meets the requirements of particle size and ash content of raw materials in fields such as high-end carbon materials from coal and nano-hydrogen fuels, and expands the application scope of coal-based carbon materials in high-end industries.

This invention discloses a rare-earth iron-based permanent magnet, its preparation method, and the application of zirconium alloy. The preparation method includes the following steps: 1) crushing raw materials comprising rare-earth iron-based alloy coarse powder and at least one zirconium alloy powder using an air jet mill to obtain magnetic powder; based on the weight of the rare-earth iron-based alloy coarse powder, the total amount of zirconium alloy powder is 0.05–0.5 wt%; 2) molding the magnetic powder to obtain a blank, and heat-treating the blank to obtain the rare-earth iron-based permanent magnet; the zirconium alloy powder has the following composition: Zr a Cu b M c Wherein, 25≤a≤70, 20≤b≤70, 1≤c≤20; M is selected from one or more of Hf, Ni, Co, Al, Be, Dy, Tb, Ni, Si, B, Sn, and Ti; where a, b, and c represent the molar or atomic parts of Zr, Cu, and M, respectively. The rare-earth iron-based permanent magnets obtained by the method of this invention possess high magnetic properties.

The application provides an air flow pulverizer feeding mechanism, which comprises a container, a screw conveyor is arranged at the bottom of the container, a first pipeline is arranged at the bottom of the screw conveyor and away from the container, a movable plate is slidably arranged on the container, the movable plate extends to the outside of the container at both ends, and a rubber pad is arranged on the contact surface between the container and the movable plate. The raw material is put into the container from the top of the container, and a driving unit is started at the same time. The driving unit drives the cam to rotate. During the rotation of the cam, when the protruding end of the cam extrudes the fixed plate, the fixed plate drives the movable plate to move at this time, and the elastic assembly is extruded to deform at the same time. When the protruding end of the cam is away from the fixed plate, the elastic assembly is reset at this time, and the movable plate is reset. Thus, the movable plate is repeatedly moved to screen the raw material, so that the large-size raw material is prevented from entering the pulverizer, and the raw material is affected by vibration to disperse part of the balled raw material.

The application provides a rotary impact crusher, which comprises a machine body, a first discharge port arranged at the bottom of the machine body, a return port arranged at the side wall of the machine body, an upper cover connected to the upper part of the machine body, and a vibrating screen assembly connected to the lower end surface of the machine body; a crushing cavity is arranged in the machine body, a first feeding port communicated with the crushing cavity is symmetrically arranged at the top of the upper cover, a transmission assembly extending into the crushing cavity is installed at the center of the top, and a rotary impact cutter is sleeved with the lower end of the transmission assembly; the vibrating screen assembly comprises a screening bucket, a second feeding port arranged at the upper part of the screening bucket, a second discharge port and a third discharge port respectively arranged at the side part and the bottom of the screening bucket, an inclined downward screen plate arranged in the screening bucket, and a return assembly arranged between the second discharge port arranged at one side of the bottom of the screen plate and the return port. The rotary impact crusher of the application returns the coarse-grained material to the crushing cavity through the vibrating screen assembly to perform secondary crushing through the return port arranged at the side wall of the machine body, thereby effectively improving the production efficiency and product quality.

The utility model discloses a novel airflow mill nozzle relates to airflow crushing field. The novel airflow mill nozzle, including nozzle entrance part and nozzle outlet part, the outside of nozzle entrance part is provided with fixed sleeve, and the nozzle outlet part swing setting is in the front end of nozzle entrance part, and the installation of four fluorine sealing ring between both, the front end of fixed sleeve is installed with fixed lid, and the nozzle outlet part is anchored in the front end of nozzle entrance part through fixed lid. The novel airflow mill nozzle, will fixed sleeve activity sleeve and be connected in the outer surface of nozzle entrance part, and utilize the assembly flange and fix fixed sleeve on compressed air pipeline, and the nozzle outlet part is inserted from the front end of fixed sleeve, and is installed with the thread of wrapping sleeve through the screw penetration fixed lid, and the nozzle outlet part is fixed in the front end of nozzle entrance part in this way, thereby in the use process, when the nozzle outlet part wears, can remove it and replace with the fixed lid removal, reduce replacement cost and difficulty.

The invention relates to the technical field of modified mineral powder and preparation thereof, in particular to modified mineral powder and a preparation method thereof.The preparation method comprises the following steps that iron-making blast furnace slag serves as a raw material and is fed into a ball mill to be subjected to staged grinding, and then metal impurities are removed; the mineral powder after impurity removal is placed in hot air circulation drying equipment to be dried, the mineral powder is cooled to the room temperature and then screened, and target mineral powder is obtained; the D97 particle size of the target mineral powder is tested through a laser particle analyzer, and the total dosage and the compounding proportion of the modifier are adjusted according to the D97 particle size; the material temperature is monitored in real time; the mixed materials are naturally cooled to the temperature below the preset temperature and fed into a jet mill to be subjected to graded grinding, grinding process parameters are adjusted according to the material agglomeration degree, and the materials obtained after secondary grinding are placed in vacuum drying equipment to be subjected to deep drying; sealing and packaging the modified mineral powder; and unqualified materials are returned to corresponding procedures according to defect types for reworking treatment. The preparation stability of the modified mineral powder is improved.

The application relates to the technical field of crushing equipment, and discloses a composite airflow crusher for magnesium hydroxide, which comprises a crushing box, the upper surface of the crushing box is fixed with a box cover through threads, the inner side surface of the crushing box is adhered with a wear plate through heat-conducting glue, the upper surface of the box cover is through-welded with a discharging cylinder, the surface of the discharging cylinder is installed with a turbine through sealing bearings, the upper surface of the box cover and one side of the discharging cylinder are through-welded with a feeding air pipe, and the upper surface of the feeding air pipe is through-welded with a feeding bin. In the application, airflow acts on the turbine through the first annular air pipe and the first air nozzle, so that the turbine is driven to rotate, centrifugal force generated by high-speed rotation of the turbine is utilized to forcibly throw magnesium hydroxide materials to the wear plate, the materials are pre-crushed under the action of impact and friction, the processing load of the main crushing cavity is reduced, the overall energy consumption is indirectly reduced, and uniformly dispersed raw material basis is provided for subsequent superfine crushing.

The utility model relates to a kind of feeding device of new fluidized bed type jet mill, including bunker, conveying pipe, installation pipe, scattering device, rotating device and conveying device, one end of the bunker is equipped with feed pipe, one end lateral wall of the bunker is equipped with feed pipe, the bottom end of the bunker is equipped with discharge pipe, the outer wall of the discharge pipe is equipped with valve, the bottom end of the discharge pipe is connected with the top wall one end of the conveying pipe through, driving gear drives driven gear to rotate together, and then make first scattering shaft and second scattering shaft start working, first scattering blade and second scattering blade on first scattering shaft and second scattering shaft respectively carry out scattering operation to material, ensure that material cannot cake and uniformly distribute in bunker, uniformly dispersed material helps to obtain finer, narrower product of granularity distribution, improve the quality and consistency of final product, meet the strict requirement of high-precision powder production.