27 results about "Mechanical crushing" patented technology

The application relates to the technical field of magnetocaloric materials, and discloses a low-curie-temperature iron-based magnetocaloric material, a preparation method, a deicing agent and a coating. The magnetocaloric material takes iron as the main body, introduces rare earth elements, transition group elements and metalloid elements to form a synergistic component system, and has the characteristics of adjustable curie temperature and high saturation magnetic induction intensity. The preparation method comprises the following steps: alloy smelting and high-temperature homogenization heat treatment, block pretreatment, segmented parameter control hydrogen crushing, and gradient temperature rising high-vacuum dehydrogenation. Through the hydrogenation process combining low-temperature permeation, high-pressure crushing and heat preservation and refinement, the uniform and controllable crushing of the alloy is realized, and the residual hydrogen content is effectively reduced in the multi-stage dehydrogenation process. The application can significantly improve the problems of serious oxidation, uneven particle size and magnetic performance attenuation existing in the traditional mechanical crushing or conventional hydrogen crushing process. The obtained magnetocaloric material shows high saturation magnetic induction intensity and stable magnetocaloric performance in the low curie temperature interval.

The application discloses a refractory metal-ceramic composite environmental barrier coating adhesive layer material, which is prepared by uniformly mixing HfO2 and Nb through mechanical crushing, and in the adhesive layer material, the mass percentage of HfO2 is 60% to 90%, and the mass percentage of elemental Nb is 10% to 40%. The novel composite environmental barrier adhesive layer material has simple raw material composition, good uniformity, high use temperature and effectively improves the service life of the environmental barrier coating.

The utility model relates to a sealing structure technical field of crushing equipment, concretely relates to an oil gas sealing structure for airflow mill grading and mechanical crushing grading, aims at solving the problem that the sealing structure is affected by particle and leads to poor sealing effect. Including spindle and bearing seat, and the bearing piece, oil baffle, elastic baffle, bearing cover and sealing ring that are coaxially assembled with the spindle, still include labyrinth ring, the air passage is opened in the labyrinth ring, and the air inlet pipe is connected on the bearing seat, and the air inlet pipe is communicated with the air passage. The labyrinth ring is assembled in the bearing seat end portion and prevents the particle from entering the sealing structure, and the air passage is opened in the labyrinth ring, and the gas is injected into the air passage, prevents the dust particle from entering the sealing gap, thereby reduces the erosion and pollution of the particle to the bearing piece and sealing structure.

The application discloses a construction method for adding an ore transfer rubber belt way during capital construction, which comprises the following steps: adopting a composite protection structure to fully close and protect a through section of an existing rubber belt way, fixing existing cables and optical fibers in the rubber belt way, adopting a mechanical crushing and rock drilling method to excavate a section near a mine portal, and performing anchor net support, adopting a multiple cycle blasting method to excavate a normal section of the rubber belt way, excavating an upper part of a transfer station chamber, and performing anchor net support, excavating a lower part of the transfer station chamber, and performing anchor net support, monitoring the displacement of surrounding rocks of the section near the mine portal, the normal section of the rubber belt way and the transfer station chamber, waiting for the deformation of the surrounding rocks to be stable, performing permanent lining on a straight wall section, performing permanent lining on an arch section, finally performing permanent lining on a bottom plate section, and installing rubber belt way equipment, so that the influence of blasting on existing facilities is reduced to the minimum, the peak value of blasting vibration is effectively reduced, and the disturbance of one-time full-face blasting on adjacent facilities is solved.

This utility model relates to the field of road snow removal technology, specifically a snow and ice removal device for roads and bridges. It includes a snowplow, with a snow-scraping shell fixedly installed at its front end. A snow-scraping blade is rotatably mounted on the inner wall of the snow-scraping shell. A snow-shoveling device is located at the bottom of the snowplow, including a rotating shaft rotatably mounted at the bottom of the snowplow. A turntable is fixedly installed at the bottom end of the rotating shaft, and a mounting rod is fixedly installed near the outer bottom of the turntable. This utility model utilizes the periodic forward and backward movement of a sliding rod within an inclined sliding cylinder to allow the scraper to cut into the snow and ice layer with a downward impact force. Simultaneously, the rotating and crushing action of the blade, along with suction and throwing, forms a triple snow removal mechanism of "impact scraping - mechanical crushing - negative pressure cleaning." This reciprocating motion simulates the movement of a human hand shoveling snow, improving the scraper's efficiency in removing stubborn ice and snow, significantly reducing manual rework and the use of de-icing agents.

The present application belongs to the technical field of preparation of low-interstitial impurity titanium alloy powder, and particularly relates to a method for preparing low-interstitial impurity alloy powder based on large-size hydrogenatable alloy waste, comprising the following steps: S1: cleaning the surface of the block-shaped waste, and drying the obtained alloy block for standby; S2: placing the alloy block in a hydrogenation furnace, vacuumizing, and then heating to a set temperature; S3: hydrogenating the material; S4: dehydrogenating the material; S5: secondary hydrogenating the material; S6: after repeating steps S3-S5 for multiple times, taking out the hydride for mechanical crushing, and sieving out hydride powder of a required particle size; S7: placing the hydride powder in a vacuum furnace, vacuumizing, heating to a set temperature, and keeping the temperature; S8: immediately introducing high-purity argon into the furnace and keeping the positive pressure in the furnace, and obtaining low-interstitial impurity alloy powder after the furnace is cooled to room temperature. The present application can realize low-cost and efficient recycling of large-size hydrogenatable alloy waste, and prepare high-quality alloy fine powder with low-interstitial impurities.

This utility model relates to the field of feed processing technology, specifically a feed raw material screening and impurity removal device, including a machine body. A circular cavity is provided in the middle of the machine body, and a top frame is fixedly installed on the top of the circular cavity. A feeding component is provided on the top frame, and a feed hopper is installed at one end of the top of the top frame. A metal adsorption component is provided on one side of the top of the top frame. A fixed cylinder is fixed in the middle of the bottom of the circular cavity, and mounting holes are opened in the middle of the fixed cylinder and the middle of the bottom of the machine body. A rotating shaft is rotatably connected to the inner wall of the mounting hole through a bearing. This utility model can combine mechanical crushing, air screening, and magnetic adsorption triple impurity removal mechanism, which can effectively remove various impurities such as metal, straw, and dust, improve the purity of feed raw materials, and is suitable for screening various feed raw materials such as soybeans and corn. It has a good crushing and separation effect on agglomerated raw materials, meeting the needs of modern feed production.

This invention relates to the field of nanoparticle preparation technology and discloses a controllable particle size pipette tip for extracting silk fibroin nanoparticles. The tip includes a pipette body, with a connecting tube at one end and a filter structure for sieving silk fibroin molecules at the other end. The pipette body also contains a crushing structure for breaking down silk fibroin molecules. The pipette body is connected to the output end of a pipette body via the connecting tube. When the pipette body discharges liquid, silk fibroin molecules enter the pipette body of the controllable particle size pipette tip, are first mechanically crushed by the crushing structure, and then sieved through the filter structure to obtain silk fibroin particles that meet the requirements before being discharged. Compared to traditional ultrasonic processing methods, this controllable particle size pipette tip can directly obtain silk fibroin nanoparticles of a specified size. It is convenient to use, enables small-scale and rapid preparation of silk fibroin nanoparticles, and effectively improves the efficiency of silk fibroin nanoparticle preparation.

This invention discloses a dry, tiered recovery process for stainless steel slag, categorized by type. First, the cooled slag is fed into a magnetically sensitive device, where it is separated into strongly magnetic slag and weakly magnetic slag based on magnetic strength. The strongly magnetic slag is extracted using mechanical crushing and weak magnetic separation; the weakly magnetic slag is extracted using high-pressure lamination fracturing, mechanical crushing, narrow-level sieving, aerodynamic air separation, and high-gradient magnetic separation. During crushing or separation, a carbon-based reducing agent is added simultaneously, utilizing the mechanical frictional heat effect to reduce hexavalent chromium to trivalent chromium in situ. Finally, a sulfate activator is added online to the tailings containing residual mechanical heat for depolymerization modification. This process reduces grinding energy consumption, significantly improves the recovery rate of valuable metals, and achieves in-situ detoxification and high-value resource utilization of the tailings.

This invention discloses a high-strength magnesium alloy composite structural component and its preparation method. The component is composed of a wrought magnesium alloy insert and a semi-solid injected magnesium alloy matrix, forming a diffusion-metallurgical bonding interface between them. The preparation method includes: cleaning and micro-roughening pretreatment of the wrought magnesium alloy insert; preheating the insert to 250°C to 50°C below the solidus temperature under a non-oxidizing atmosphere; preparing a semi-solid slurry with a solid fraction of 30%~90% from the magnesium alloy raw material, and injecting it into the mold cavity of the pre-placed insert under a protective atmosphere; after pressure solidification, opening the mold, removing the component, and performing post-processing. This invention utilizes the mechanical crushing effect of the semi-solid slurry on the pre-oxidized layer on the insert surface to achieve a strong metallurgical bond, significantly reducing shrinkage cavities, residual stress, and deformation, while retaining the high strength and high toughness of the wrought magnesium alloy, making it suitable for lightweight thick-walled structural components.

The application provides a mutagenesis breeding method based on seed island Porphyra and application thereof, and belongs to the technical field of breeding.The mutagenesis breeding method based on seed island Porphyra provided by the application comprises the following steps: selecting immature seed island Porphyra thalli for segmentation to obtain segmented leaves; the segmented leaves are subjected to ARTP mutagenesis, the leaves after mutagenesis are subjected to light-avoiding culture, and then mechanical crushing is performed to 20-40 cell sizes, and then the mutants are screened.The application combines the single spore dissemination technology induced by damage and the ARTP technology, uses the seed island Porphyra thalli as mutagenesis materials for mutagenesis, greatly shortens the mutagenesis period and reduces the workload, has the advantages of high efficiency, high mutation rate and good specificity, and can obtain stable mutants.

The application belongs to the field of rare earth permanent magnet materials, and particularly relates to a high-abundance rare earth permanent magnet material and a preparation method thereof. x Fe 100‑x‑y‑z M y B z The raw materials are weighed according to the mass ratio, the mass ratio of Re:(Fe, M):B is 29:70:1, and the content of the rare earth element Ce accounts for 25-30% of the total rare earth content; (2) the raw materials are sequentially subjected to induction melting, rapid quenching, mechanical crushing and screening of particle size, so that the magnetic powder with a grain size of 20-100 nm is obtained; (3) hot-press forming: the magnetic powder is placed in a mold, a temperature is kept at 600-700 DEG C in a vacuum environment, a pressure of 150-250 MPa is applied, and the pressure is kept for 1-3 minutes, so that a dense hot-pressing blank is obtained; (4) hot deformation forming: the dense hot-pressing blank is deformed at 800-900 DEG C and 50-150 MPa, the deformation amount is not less than 70%, and after being kept for 30-60 seconds, a hot-deformed magnet is obtained. The preparation method has high Ce content, low cost and excellent magnetic properties of the obtained permanent magnet.

The utility model provides a kind of impact breaking device, belong to mechanical crushing technical field.Its structure includes: impact plate is inserted in slot, flange and the edge of slot are mutually matched, installation hole is equipped in the back side of support plate, hole is equipped in the back side of impact plate, transverse bolt passes through hole and is fastened and connected in installation hole, the front side of impact plate is equipped with several insertion slot, convex rib is embedded in insertion slot, blind hole is equipped in the top end of convex rib, the bottom end of top plate is equipped with several pin body, pin body is inserted into blind hole.The utility model has carried out innovative improvement to the mounting structure of impact plate and lining plate, wherein lining plate adopts multi-point positioning combination bolt fastening structure, impact plate designs base plate and convex rib split type structure, cooperation between the two is with pin, slot structure, and utilize top plate fixed.The utility model can realize the complete disassembly of lining plate, impact plate, convex rib, and it is more convenient to replace, simultaneously, good stability and structural strength are maintained.

This invention relates to the field of hydrogen energy production, specifically to a composite material for improving the performance of magnesium-based hydrolysis hydrogen production, comprising a Mg-Ca alloy and Mg2M, wherein the mass percentage of Mg2M is 8%-15%; and the mass percentage of Ca in the Mg-Ca alloy is 8%-12%. The preparation method includes: Mg-Ca alloy preparation: magnesium and calcium materials are melted in an inert gas atmosphere at a melting temperature of 740-760℃, and then cooled to room temperature to obtain the Mg-Ca alloy; Mg2M preparation: magnesium and Mg2M materials are melted in an inert gas atmosphere at a melting temperature of 740-760℃, and then cooled to room temperature to obtain the Mg2M material; Ball milling: the Mg-Ca alloy and Mg2M are mechanically crushed and then pre-ball milled, followed by fine ball milling. By implementing this method, the conversion time for hydrogen production from magnesium-based materials can be improved.

This invention relates to a method for preparing a Mg-based hydrogen storage alloy with Mg2Cu / Mg2Ni dual-phase synergistic catalysis, comprising the following steps: S1: Mg2Cu / Mg2Ni hydrogen storage alloy with atomic percentage of general formula... 40 Ni 10‑x Cu x S2: Weigh the raw materials according to the specified proportions; S3: Place the raw materials in the crucible of the melting furnace and melt them under a protective atmosphere. During the melting process, intermittent electromagnetic stirring is performed. After cooling, a cast alloy ingot is obtained; S4: After surface polishing and cyclic deep cryogenic treatment, the cast alloy ingot is mechanically crushed into particles with a particle size of less than 2 mm; S5: Place the particles in a ball mill jar and perform high-energy ball milling under an inert protective gas. After ball milling, the particles are sieved to obtain a hydrogen storage alloy. This invention forms an interwoven and coupled Mg2Cu / Mg2Ni dual-phase synergistic structure through appropriate doping of Cu, which significantly improves the hydrogen absorption and desorption kinetics while maintaining a high hydrogen storage capacity. The method is process-controllable, has uniform composition, and is suitable for large-scale preparation.

This invention discloses a method for preparing and applying nano-silicon carbide. Using petroleum-based hydrocarbons as the carbon source and nano-silicon particles obtained from the reduction of silicon-containing compounds as the silicon source, nano-silicon carbide is prepared via a two-step method combining low-temperature reduction and calcination. Specifically, silicon-containing compounds, hydrides, molten salts, and petroleum-based hydrocarbons are reduced at low temperature to obtain a silicon carbide composite. This composite is then calcined in an argon atmosphere to generate 3C-type silicon carbide particles with a particle size of 10–20 nm. The prepared nano-silicon carbide was used as a lithium-ion battery anode and tested, exhibiting good cycle stability and rate performance. This invention prepares nano-silicon carbide using a simple method combining low-temperature reduction and calcination, eliminating the need for mechanical crushing. The prepared nano-silicon carbide is a lithium-ion battery anode material with high cycle stability and excellent electrochemical performance.

This invention discloses a hot-pressing forming method for high voltage-resistant laminated busbar insulation film, belonging to the technical field of laminated busbars. It includes a hot press body, with a support platform extending outwards on one side fixedly installed at the lower part of the inner cavity of the hot press body. A support leg is fixedly installed on the front side of the bottom of the support platform, and a lower mold is provided on the rear side of the top of the support platform. A rectangular opening is provided in the middle of the support platform. Through the cooperation of components such as a vertical plate, screw, movable gear, transmission gear, servo motor A, threaded sleeve, limiting plate, limiting rod, straight plate, and fixing rod, the lower mold can be driven to slide back and forth on the support platform, realizing the conveying, loading, and unloading of busbars. This eliminates the need for manual operation, reducing the workload of workers and solving the problem of existing methods that rely on manual handling, which are not only labor-intensive but also pose safety risks such as burns and mechanical crushing to operators due to the high temperature and pressure environment of the hot press.

The application relates to a sodium iron manganese magnesium phosphate positive electrode material and a preparation method thereof, and belongs to the technical field of sodium batteries. The preparation method comprises the following steps: (1) under the stirring state, magnesium sulfate solution, ferrous sulfate solution, manganous sulfate solution and sodium carbonate solution are added into a reaction kettle; (2) the slurry is filtered and washed, the filter cake after washing is added with water to prepare a slurry, then phosphoric acid, sodium bicarbonate solution and sucrose are added into the reaction kettle, and then the slurry is reacted under the action of an alternating current field and a magnetic field for 3-6 hours; (3) the slurry after reaction is filtered, washed and dried to obtain sodium iron manganese magnesium phosphate; (4) rapid sintering and mechanical crushing are carried out to obtain the sodium iron manganese magnesium phosphate positive electrode material. The material prepared by the application has higher crystallinity and better carbon coating effect, so that the synthesized material has higher capacity, more excellent rate performance and longer cycle life compared with the material synthesized without adding an electric field and a magnetic field.

The application provides a vertical gravity electromagnetic calcining furnace equipment and method for producing high-activity magnesium oxide, and belongs to the technical field of high-activity magnesium oxide preparation, and comprises a vertical heating cylinder tower unit, an adiabatic insulation layer unit, a raw material powder conveying, scattering and dispersing unit, a magnesium oxide recovery and cooling unit, an electromagnetic induction heating unit, a CO2 gas recovery, purification and liquid CO2 preparation unit; the device does not need mechanical crushing, the material is heated for a short time, and the overburning phenomenon of magnesium oxide caused by a too long heating time is avoided; the material falls in a free falling state by gravity, has little contact with the tower wall and a short time, and the problem of wall sticking commonly existing in calcining furnaces is solved; magnesium carbonate is calcined in a fully-closed system, air suction is avoided, and after bag dust removal and gas washing and purification, liquid CO2 products are directly compressed, high-value recycling of carbon resources is realized, there is no burden of desulfurization and denitrification, and clean, low-carbon and green production is realized.

This invention discloses a method for preparing amorphous FeSiCr magnetic powder, comprising preparing raw materials according to a formula, vacuum refining the raw materials and casting master alloy rods, melting the master alloy rods and spinning them into strips, mechanically crushing the strip alloy, sieving, and annealing to obtain the finished amorphous FeSiCr powder. This invention obtains sheet-like or strip-like amorphous FeSiCr alloys through jet spinning, followed by mechanical crushing to obtain amorphous FeSiCr magnetic powder with no compositional segregation and a uniform structure. This powder exhibits isotropy, better processing plasticity, higher surface uniformity, and more stable overall performance, significantly improving the magnetic properties of the powder product. It is suitable for preparing high-permeability, low-loss inductor devices and further enhances the corrosion resistance of the powder.

The application relates to a sodium iron manganese magnesium phosphate positive electrode material and a preparation method thereof, and belongs to the technical field of sodium batteries. The preparation method comprises the following steps: (1) under the stirring state, magnesium sulfate solution, ferrous sulfate solution, manganous sulfate solution and sodium carbonate solution are added into a reaction kettle; (2) the slurry is filtered and washed, the filter cake after washing is added with water to prepare a slurry, then phosphoric acid, sodium bicarbonate solution and sucrose are added into the reaction kettle, and then the slurry is reacted under the action of an alternating current field and a magnetic field for 3-6 hours; (3) the slurry after reaction is filtered, washed and dried to obtain sodium iron manganese magnesium phosphate; (4) rapid sintering and mechanical crushing are carried out to obtain the sodium iron manganese magnesium phosphate positive electrode material. The material prepared by the application has higher crystallinity and better carbon coating effect, so that the synthesized material has higher capacity, more excellent rate performance and longer cycle life compared with the material synthesized without adding an electric field and a magnetic field.

This utility model provides an asphalt pavement mechanical crushing and recycling device, relating to the field of asphalt recycling technology. It includes a dust suppression mechanism comprising a dust suppression chamber with a screen plate inside. The interior of the dust suppression mechanism slides in contact with the top of the screen plate, and a connecting plate is provided at the top of the screen plate. When the motor is started, the eccentric disc begins to rotate. During this rotation, external forces are indirectly applied to the two fixed columns. This allows the side plates, cross plates, and bottom connecting plate to reciprocate synchronously. Since the connecting plate is mounted on the screen plate, the screen plate uses this reciprocating motion to remove dust from the asphalt. During dust removal, a water pump is started to introduce water from the water tank into the spray chamber, which is mounted on the screen plate. Finally, under the pressure of the water pump, water is sprayed from the spray chamber, thus suppressing the dust and preventing it from re-attaching to the asphalt.

The application belongs to the technical field of hard carbon preparation, and particularly relates to a biomass waste derived hard carbon material preparation method and equipment; the method comprises the following steps: S1, water washing and impurity removal are performed on the biomass waste, and the water content of the biomass waste is reduced; S2, the biomass waste with reduced water content is put into a treatment tank for mechanical crushing, and then screening is performed to obtain powder with uniform particle size; S3, the screened powder is pre-carbonized under an inert atmosphere, is heated to a certain temperature and is kept at the temperature, volatile components are removed, and a stable carbon precursor is formed; and S4, the pre-carbonized product is soaked or washed with acid liquid, metal ions and inorganic impurities in the raw material are removed, and then water washing is performed to neutralize and drying is performed; the water content of the waste is reduced in all directions, the water content is prevented from being too high due to operation dead angles, material adhesion and agglomeration are prevented during subsequent crushing and screening, the screen is prevented from being blocked, the surface attached water of the waste is further removed before the waste enters the next process, and the production efficiency and use effect of the equipment are improved.

The utility model relates to an automatic ration packing scale with anti -blocking function for superfine powder packaging, including packing scale body and feed hopper, the packing scale body is provided with anti -blocking subassembly, the anti -blocking subassembly includes setting on the filter screen of feed hopper and the cam of abutment with filter screen, the packing scale body is provided with the first drive part of being connected with cam, just the first drive part is used for driving filter screen to do transverse reciprocation, the top of filter screen and the inside of feed hopper are provided with the stirring frame, the packing scale body is provided with the second drive part of being connected with stirring frame, and second drive part is used for driving stirring frame to do circumferential motion. This automatic ration packing scale with anti -blocking function for superfine powder packaging, utilizes cam to drive filter screen to do transverse reciprocation, carries out mechanical crushing to the agglomerated material, and preloosens simultaneously with the aid of stirring frame, has solved the technical problem that superfine powder material is easy to jam in the packaging process.

This invention relates to a high-temperature and high-pressure preparation method for ultrafine diamond high-density array nucleation, belonging to the field of synthetic diamond technology. The method involves preparing 500-mesh Fe-Ni catalyst powder via gas atomization, mixing it with fine-particle high-purity graphite powder at a mass ratio of 80:20 in a ball mill, ball milling the mixture, and pressing it into a graphite column preform. This preform is then subjected to high-temperature reduction treatment under a hydrogen atmosphere. A secondary cold-pressing process is then performed to refine the preform to a specified size, yielding a high-density graphite core column. This graphite core column is then placed in a six-sided press chamber for high-temperature and high-pressure synthesis, followed by mechanical crushing, electrolytic purification, cleaning, and sieving to obtain ultrafine diamond single crystals with a main particle size ≤30μm. This invention overcomes the technical bottleneck of the traditional HTHP method for preparing ultrafine diamond single crystals, enabling stable batch production of ultrafine diamond single crystals with a main particle size ≤30μm, and significantly increasing the graphite conversion rate to over 50%.

This invention provides a liquid nitrogen freezing and crushing device and a beverage production system based on liquid nitrogen freezing and freshness locking, relating to the field of beverage processing equipment technology. The liquid nitrogen freezing and crushing device includes a liquid nitrogen deep-freezing mechanism, a primary crushing mechanism, a secondary crushing mechanism, a liquid nitrogen supply mechanism, and a nitrogen circulation mechanism. This invention utilizes liquid nitrogen deep-freezing and quick-freezing technology to instantly crystallize the water inside fruit cells, making the material brittle. Subsequently, under continuous low-temperature inert gas protection, multi-stage mechanical crushing is performed to achieve cell-level physical cell disruption, transforming the whole fruit or its components into ultra-fine frozen fruit powder. The activity of heat-sensitive nutrients is protected, resulting in a beverage with a richer aroma and closer resemblance to natural fresh fruit. This beverage production system based on liquid nitrogen freezing and freshness locking integrates a complete chain from freezing and crushing to low-temperature blending, clarification, and sterilization, forming an optimized production system specifically for producing high-quality frozen crushed base beverages.