173 results about "Jet mill" patented technology

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 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 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 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.

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.

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.

A single- or multi-stage mechanochemical reactor (1) according to Figure 1, selected from the group consisting of ball mills, attritor ball mills, vibrating ball mills, resonant acoustic mixers, hammer mills, impact mills, pin mills, cutting mills, jet mills and twin-shaft extruders, equipped with a self-regulating thermal management system for a temperature range of -195°C to 1000°C, wherein - the self-regulating thermal management system comprises at least one heat pipe (2) and / or at least one flat heat pipe (3) and at least one heat source (4) and at least one heat sink (5) which are in thermally conductive contact with each other, - that at least one heat pipe (2) and / or at least one flat heat pipe (3) is or are installed in and / or a static component (1.1) of the reactor (1) and is or are in thermally conductive contact with the material to be ground (1.2) or the material to be ground (1.2) and the grinding media or grinding balls (1.4) in at least one grinding chamber (1.3) of the reactor (1) and - the static component (1.1) serves as a heat source (4) or as a heat sink (5) for the at least one heat pipe (2) and / or the at least one flat heat pipe (3); as well as its use in the fields of chemistry, biochemistry, nanotechnology, pharmacy, biology and microbiology, and environmental technology.

The utility model provides a jet mill for lithium iron phosphate production, which relates to the technical field of lithium iron phosphate production devices, and comprises a bottom cylinder, an air distribution chamber, an air ejector pipe, a crushing cylinder, a grading cylinder, a grading wheel, a motor and a material receiving pipe, the air distribution chamber is annularly arranged on the outer wall of the bottom cylinder, one end of the air ejector pipe is connected with an air outlet arranged on the air distribution chamber, and the other end of the air ejector pipe is connected with an air outlet arranged on the grading wheel. The bottom of the smashing cylinder is installed on the top of the bottom cylinder, a feeding port is formed in the smashing cylinder, the bottom of the grading cylinder is installed on the top of the smashing cylinder, and the top of the grading cylinder is closed. The power output end of the motor is connected with the power input end of the grading wheel. By means of the lithium iron phosphate grading device, the problems that when a traditional jet mill crushes lithium iron phosphate, coarse particles which do not reach the standard easily reach the inside of the grading barrel along with airflow, consequently, the grading wheel frequently treats particles needing to be continuously crushed, and energy waste and abrasion of the grading wheel are caused can be solved.

The invention belongs to the technical field of nattokinase, and particularly discloses nattokinase powder based on superfine grinding of natto as well as a preparation method and application thereof, and the preparation method comprises the following steps: S1, uniformly mixing natto and a protective agent, spreading the mixture in a container, and pre-freezing for 2-24 hours to obtain pretreated natto; s2, transferring the natto into a freeze dryer, and sequentially performing normal-pressure cooling, vacuum heating and normal-pressure heating treatment to obtain freeze-dried natto; s3, transferring the anti-caking agent and the freeze-dried natto into a crusher, crushing and sieving to obtain crude natto powder; and S4, transferring the crude natto powder to a jet mill, and performing crushing, sieving and packaging to obtain the nattokinase powder. According to the nattokinase powder based on superfine grinding of natto as well as the preparation method and the application of the nattokinase powder, the specific surface area is increased, so that surface active groups are exposed, the adsorbability and the solubility are enhanced, the eating feeling of a beverage is improved, and the absorption rate of nattokinase is further increased after the beverage is eaten.

The utility model relates to anti-sinking jet mill equipment which comprises a jet mill body, the spraying mechanism comprises a plurality of crushing nozzles which are uniformly distributed; electronic weighing devices are arranged on the brackets and are connected with and provided with the jet mill bodies; the adjustable connecting mechanism comprises a fixing part mounted on the outer side wall of the jet mill body and a mounting plate vertically and fixedly connected to the end part of the lug plate, and the mounting plate is adjusted up and down to adjust the balance of the jet mill body; a group of adjusting pieces are mounted on the fixing piece in a relatively movable manner and are used for connecting and driving the mounting plate to move up and down; the two adjusting pieces drive the mounting plate to move upwards when moving oppositely, and the two adjusting pieces drive the mounting plate to move downwards when moving oppositely. The lifting mechanism comprises pulse nozzles staggered with the crushing nozzles, and the pulse nozzles are electrically connected through an electronic weighing device so as to be opened and closed in an intermittent operation mode. According to the utility model, the adjustment efficiency and precision of the installation flatness are effectively improved, the weighing precision is further ensured, and the problem of bottom sinking is effectively prevented.

The invention discloses a preparation method of a modified nano carbon material and a lithium ion battery. Equipment for implementing the preparation method comprises a batch feeder, a jet mill and a demagnetizing machine which are sequentially arranged in the material advancing direction, and the jet mill and the demagnetizing machine are sequentially arranged from top to bottom in the height direction; the preparation method comprises the following steps: step 1, a nano carbon material and a modified material are mixed according to a mass ratio of 100: 0.1-5 and then enter a jet mill through a batch feeder, the modified material comprises a polymer and micromolecular amine, and the mass ratio of the polymer to the micromolecular amine is 100: 5-10; and step 2, after being crushed by the jet mill, the materials enter a demagnetizer in a free falling manner under the action of gravity to be demagnetized. The nano carbon material has better dispersity and lower metal impurity content.

The invention relates to the technical field of lithium battery raw material processing, in particular to a fine crushing device and process for a lithium manganese iron phosphate material. The fine crushing device comprises an airflow crushing machine body, and a grading assembly is arranged at the top end in the airflow crushing machine body; the sanding machine body is positioned on one side of the airflow crushing machine body; the fluidized bed drying and coating machine body is positioned on one side of the sanding machine body; the opening and closing assembly comprises an annular pipe arranged on the outer side of the jet mill body in a sleeving mode and adjusting bases evenly arranged above the annular pipe at intervals in the circumferential direction of the outer wall of the jet mill body. The adjusting assembly comprises an annular plate arranged on the outer side of the airflow smashing machine body in a sleeving mode and sliding blocks fixedly arranged at the front end and the rear end of the inner wall of the annular plate. The fine crushing device for the lithium manganese iron phosphate material can be used for inspecting a high-pressure airflow pipe, reducing the pressure of an air source, reducing the temperature of a grinding space, avoiding manganese oxidation, synchronously completing drying and coating of lithium manganese iron phosphate, and avoiding secondary agglomeration.

The invention belongs to the technical field of inorganic filler modification, and particularly relates to a rubber filler preparation method, which comprises: (1) contacting fly ash with superheated steam in a fluidized bed jet mill, and grinding to obtain a crushed material; (2) after being separated by a grading wheel, the crushed materials and steam enter a connecting pipeline arranged between a fluidized bed jet mill and a first bag-type dust collector; a nozzle is mounted on the connecting pipeline, and a modifier solution and inert gas are respectively added into the connecting pipeline; under the conveying of inert gas, the ultrafine powder is suspended in the connecting pipeline and reacts with the atomized modifier; (3) separating the modified ultrafine powder from steam and inert gas; and (4) separating in a second bag-type dust collector arranged at the top of the buffer bin, and obtaining the superfine modified fly ash filler after separation. The modified filler prepared by the method has the characteristics of small particle size, narrow distribution and good dispersity, and meanwhile, the modification time is shortened on the basis of ensuring the modification effect.

The utility model relates to the technical field of copper oxide crushing, and discloses a continuous feeding jet mill for copper oxide, which comprises a top box, the outer side of the top box is fixedly connected with a crushing mechanism, one side of the top box is fixedly connected with a material conveying barrel, one side of the material conveying barrel is fixedly connected with a rotating motor, and the rotating motor is fixedly connected with a feeding mechanism. And one end of the rotating motor is fixedly connected with an auger rod. According to the continuous feeding jet mill for copper oxide, through the arrangement of the crushing mechanism, a hydraulic rod is started, a piston rod of the hydraulic rod drives a support to move, and therefore after a first servo motor and a first crushing roller are driven to move, the first servo motor and a second servo motor are started; the first servo motor and the second servo motor respectively drive the first crushing roller and the second crushing roller to synchronously and reversely rotate, so that the raw materials are preliminarily crushed before entering the jet mill, the particle size of the preliminarily crushed raw materials can be adjusted, and the crushing efficiency of copper oxide materials with higher hardness or serious agglomeration is improved.

The utility model discloses an airflow mill auxiliary blanking device and airflow mill equipment, the airflow mill auxiliary blanking device comprises an auxiliary air pipe, and the auxiliary air pipe is connected with a feed bin and is arranged towards a feed port; the outlet end of the first pipeline is connected with the auxiliary air pipe; the at least one vibration component is connected with the feeding bin; the second pipelines are arranged in one-to-one correspondence with the vibration components, and the outlet ends of the second pipelines are connected with the inlet ends of the vibration components; and the air source component is connected with the inlet ends of the first pipeline and the second pipeline. The utility model can improve the problems of slow blanking and easy material blockage in the traditional feeding mode, can replace the traditional mode of manual knocking to assist blanking, greatly reduces the labor intensity of workers, reduces the labor cost, reduces the startup and shutdown frequency of jet mill equipment, ensures the qualified rate of material indexes, and improves the production efficiency.

The present invention provides a jet mill, which comprises: a support, which is provided with a crushing part; a feeding part is mounted on the bracket; a separation part is mounted on the bracket; an air exhaust part is further mounted on the bracket; the separation part comprises a storage mechanism mounted on the bracket; the container is installed on the support, the bottom of the container is in an opening state, and the storage mechanism is installed at the lower end of the container; and the first pipeline is arranged at the top of the container and is used for discharging separated gas. Smashed materials are stored in the storage tank, the weight of the storage tank is increased, the storage tank moves downwards, a spring is stretched until the storage tank makes contact with an extrusion control switch, in this way, the movable shaft is driven by the power assembly to rotate, the storage tank meeting the taking-out requirement is moved out, meanwhile, a new storage tank is moved to the bottom of the container, and crushed materials are collected; in this way, in the whole taking-out process, the device operates normally, and shutdown is not needed.

The invention discloses a porous desulfurizer based on iron-containing clay and a preparation method of the porous desulfurizer, and belongs to the technical field of desulfurizers. The desulfurizer is formed by in-situ compounding of a calcium-based / sodium-based active component precursor and natural clay through a steam jet mill integrated process, the calcium-based / sodium-based active component precursor is one or more of calcium oxide, calcium acetate, calcium hydroxide and sodium bicarbonate. The prepared desulfurizing agent is high in specific surface area, the pore volume is remarkably increased, a rich mesoporous structure is formed, and the SO2 adsorption and reaction capacity is greatly enhanced; wherein Fe atoms contained in the clay can catalyze SO2 to be oxidized into SO3, generation of stable sulfate is promoted, and the desulfurization efficiency and the sulfur capacity are remarkably improved. The invention overcomes the defects of low specific surface area, few pores and insufficient reaction activity of the traditional calcium-based / sodium-based desulfurizer, has the advantages of simple process, low cost, good desulfurization performance, suitability for medium and low temperature flue gas and the like, and can be popularized and applied in flue gas purification in the industries of steel, electric power, building materials and the like.

The invention discloses a method for continuously preparing lithium sulfide through gas-solid reaction, which comprises the following steps of: adding alkaline lithium-containing compound coarse powder into a continuous jet mill system for refining to prepare alkaline lithium-containing compound powder; the method comprises the following steps: heating high-purity hydrogen sulfide gas produced industrially, and introducing the heated high-purity hydrogen sulfide gas into a primary screw cavity; the alkaline lithium-containing compound powder reacts with high-temperature hydrogen sulfide gas in the first-stage screw cavity to generate lithium sulfide coarse powder; the second-stage screw cavity cools the powder and the gas, and the lithium sulfide powder which does not meet the requirement is conveyed to a feeding port of the first-stage screw cavity to be circularly treated until the lithium sulfide powder meets the requirement; compared with the prior art, continuous operation can be achieved, the cost of raw materials is low, and the capacity of ten thousand tons can be achieved; gas is self-circulated, and the energy consumption is reduced by more than or equal to No organic solvent is needed for purification, and the process is closed and environment-friendly.

The invention relates to a jet mill with a weighing function for boehmite production, and relates to the technical field of powder preparation, the jet mill comprises a feed hopper, a jet mill, a cyclone separator, a centrifugal fan, a collecting box and a weighing and collecting assembly; the feeding hopper is vertically arranged on the ground; the jet mill is located on one side of the feeding hopper, and the feeding end communicates with the feeding hopper. The cyclone separator is located on one side of the jet mill, the feeding end of the cyclone separator is communicated with the discharging end of the jet mill, a slag discharging opening of the cyclone separator is communicated with a discharging pipe, and an electromagnetic valve is installed on the discharging pipe; the centrifugal fan is located on one side of the cyclone separator, and the air inlet end of the centrifugal fan communicates with the exhaust end of the cyclone separator. The collecting box is located below the cyclone separator, a receding hole is formed in the top end of the collecting box, one end of the discharging pipe is located in the collecting box, and a box door is hinged to one side of the collecting box; the weighing and collecting assembly is located on the collecting box and used for collecting and weighing boehmite. The device has the effect of improving the production efficiency.

The utility model discloses a system for controlling the stability of a battery material packaging environment, which comprises a dust remover, an induced draft fan, a rotary dehumidifier, a freeze dryer, a carbon dioxide adsorption device, a gas storage tank, a heat exchanger and a jet mill which are sequentially connected according to a gas flow direction, the dust remover, the induced draft fan, the rotary dehumidifier, the freeze dryer, the carbon dioxide adsorption device, the air storage tank, the heat exchanger and the jet mill are respectively provided with an air inlet and an air outlet; an air inlet of the dust remover is formed in a workshop where a battery material package is located and used for entering air in the workshop where the battery material package is located; and the main pipeline between the freeze-drying agent and the carbon dioxide adsorption device is provided with a branch pipeline for connecting part of gas in the main pipeline to a workshop where a battery material package is located. According to the system, finished powder can be collected, the recycling rate of battery materials is effectively increased, and waste and dust are reduced; meanwhile, the influence degree of the material on the environment process is greatly reduced.

The utility model relates to the technical field of jet mills, and discloses a jet mill, which comprises a bottom gas tank, a milling gas box and a Venturi feed pipe, the whole milling gas box is a circular box body, a milling surrounding ring is arranged in the milling gas box, and the Venturi feed pipe is arranged in the milling gas box. The crushing surrounding ring encloses the interior of the crushing gas box to form a circular crushing gas cavity, eight central gas inlet hole channels are evenly formed in the ring surface of the crushing surrounding ring, and an upper gas inlet hole channel and a lower gas inlet hole channel are formed in the upper portion and the lower portion of each central gas inlet hole channel correspondingly; eight high-pressure air injection assemblies for supplying air to each central air inlet hole channel, each upper air inlet hole channel and each lower air inlet hole channel are uniformly mounted around the crushing air box. The jet mill has remarkable advantages in multiple aspects. And in the aspect of the crushing effect, through the unique multi-direction air inlet duct design, the collision and friction of airflow are enhanced, and the crushing efficiency, quality and uniformity are improved.

The invention relates to the technical field of rare earth permanent magnet material manufacturing, and discloses an isostatic pressing-free rare earth permanent magnet of gadolinium yttrium activated recycled powder and a preparation method, the magnet is prepared from sintered neodymium iron boron grinding recycled powder, a gadolinium yttrium intermediate alloy and a quick-setting casting piece, and a recycled material pre-wetting agent and an airflow mill online composite lubricant are further added into raw materials. The preparation method comprises the following steps: carrying out liquid-phase pre-wetting on the recycled material, mixing with a new material, and carrying out hydrogen decrepitation; dynamically injecting a composite lubricant in the grinding process of the jet mill to prepare modified fine powder; after being subjected to magnetic field orientation compression molding, the fine powder is directly packed into a box without being subjected to cold isostatic pressing treatment; and carrying out negative pressure removal, vacuum sintering and aging treatment to obtain a final product. According to the method, high-value utilization of recycled materials is achieved through pre-wetting oxidation blocking and heavy rare earth grain boundary regulation and control; the powder fluidity is improved through jet mill in-situ lubrication modification, isostatic-pressure-free short-process manufacturing is achieved, the manufacturing cost is reduced, and meanwhile the excellent comprehensive magnetic performance and mechanical performance of the magnet are guaranteed.

The invention provides a method for improving asphalt by using polyester recovery by-product pyrolytic carbon black, and relates to the technical field of asphalt modification. The invention relates to a method for improving asphalt by using polyester recovery by-product pyrolytic carbon black. The polyester recovery by-product pyrolytic carbon black accounting for 2-15% of the weight of matrix asphalt is added into the matrix asphalt; the polyester recovery by-product pyrolytic carbon black is carbon black obtained by carrying out thermal cracking on a polyester recovery by-product. Preferably, the pyrolytic carbon black can also be dispersed by adopting a jet mill, and a dispersing agent is added to reduce agglomeration and improve the compatibility and dispersity of the pyrolytic carbon black in the asphalt. When the pyrolytic carbon black is added into the matrix asphalt, the viscosity, plasticity, temperature stability and other properties of the asphalt can be obviously improved, and reutilization of resources is realized.

A fully automatic vertical jet mill with a tamper-proof connection structure, comprising a jet mill (1), a nozzle (2) connected via a thread to the inner surface of the lower end of the jet mill (1), a flange (3) fixedly connected to the outer circumferential surface of the air inlet end of the nozzle (2), and a frame (4) arranged below the nozzle (2); characterized in that a tamper-proof device (5) is arranged below the jet mill (1), the tamper-proof device (5) comprising two mounting plates (51) each fixedly connected to both sides of the jet mill (1), grooves (52) formed in the undersides of the mounting plates (51), limit frames (53) engaged in the grooves (52), and a guide component (54) arranged above the limit frames (53).

The application discloses a kind of airflow pulverizing device for preparing composite aerogel powder material, comprising: pulverizer frame, discharge fan, high-speed pulverizing mechanism and multistage pulverizing mechanism, the inside fixed mounting of pulverizer frame has hopper, control valve group and bag filter, the gas inlet end of discharge fan is communicated with the discharge pipe of bag filter, the upper and lower ends of multistage pulverizing mechanism are respectively communicated with the feed end of multistage pulverizing mechanism and the top surface of high-speed pulverizing mechanism, the bottom surface of high-speed pulverizing mechanism is communicated by sediment collection tank, the bottom surface of hopper is movably connected with vibrating feed tube.The application is provided with a new high-speed pulverizing mechanism structure, utilizes the relative action of double-channel airflow in narrow pulverizing cabin, makes powder in pulverizing cabin to be pushed by airflow to carry out high-speed impact and friction, carries out powder particle crushing, small particle powder escapes from pulverizing cabin and is discharged, improves powder particle crushing effect and carries out efficient pulverization.

The invention discloses continuous production equipment for porous carbon by a one-step method. Comprising a first screw conveyor, a jet mill, a second screw conveyor, a disc-type raw material purification device, a filter press I, a disc-type continuous cleaning device, a filter press II, a disc-type pre-oxidation activation device, a one-step carbonization activation device, a multi-stage cleaning device, a centrifugal spray drying device and a finished product packaging device which are sequentially connected and realize continuous operation, the continuous operation equipment disclosed by the invention not only realizes the whole-process continuity of porous carbon production, but also can cover the continuous production of hard carbon, capacitor carbon and other types, and each process from raw material crushing and purification, cleaning, pre-oxidation and activation to carbonization and activation as well as finished product post-treatment and packaging has the advantages that the production efficiency is greatly improved, and the production cost is reduced. Seamless connection continuous operation is achieved through special devices connected in sequence, the efficiency bottleneck of traditional step-by-step production is thoroughly broken through, and the overall production efficiency is greatly improved.