272 results about "Mechanical crushing" patented technology

The invention discloses a method for efficiently separating and purifying plant exosomes and application, and belongs to the technical field of biological nanotechnology. The method comprises the following key steps: (1) performing sterile cleaning on plant raw materials, and then performing peeling or tissue slitting pretreatment; (2) carrying out mechanical crushing treatment by adopting a phosphate buffer solution (PBS), and filtering through a 200-mesh screen to obtain a primary extracting solution; (3) performing gradient centrifugal purification on the extracting solution, collecting supernate, and filtering the supernate through a 0.45 mu m microporous filter membrane; (4) adding 8-12% of polyethylene glycol for low-temperature phase separation and precipitation; (5) purifying by using an electrodialysis technology; and (6) carrying out final concentration by adopting a 100kDa ultrafiltration membrane to obtain the high-purity PELNs preparation. According to the method, the process, equipment and reagents are simple and easy to obtain, the final yield is high, the purity is high, particle size distribution is uniform, and an innovative solution is provided for large-scale industrial production of natural-source nano-drug carriers.

The utility model relates to the technical field of ore extraction, in particular to an ore extraction device which comprises a base of a whole device carrier, a crushing mechanism used for crushing ore is arranged on the base, a flotation tank used for separating metal substances is arranged on the base, and the base is further provided with a material distributing assembly used for expanding the discharging range. The crushing mechanism comprises a ring body rotationally installed on the base, a grinding roller rotating in the direction opposite to the ring body is further installed on the base, the diameter of the grinding roller is gradually increased from top to bottom, crushing teeth are fixedly connected to the inner ring of the ring body and the outer ring of the grinding roller, and the ring body is arranged outside the grinding roller in a sleeving mode. The crushing mechanism is arranged, the grinding roller and the ring body rotate in opposite directions, ore can be crushed through the crushing teeth, the grinding roller is in the shape of a circular truncated cone, the ore can be crushed step by step, raw materials can be decomposed into small particles, the mechanical stone crushing process can be conducted more easily and efficiently, and the crushing efficiency is improved. And the overall crushing efficiency is improved.

The invention discloses a magnetic separation method for a waste lithium ion battery pole piece, which comprises the following steps: carrying out mechanical crushing, preliminary magnetic separation, winnowing and screening treatment on a waste lithium ion battery to obtain a large-scale positive and negative pole mixed pole piece; and after the large-scale positive and negative pole mixed pole piece is subjected to pre-magnetization treatment to strengthen the magnetic difference of the pole piece, the ultra-high-purity negative pole piece is separated out through weak magnetic separation, the positive and negative pole mixed pole piece is separated out through strong magnetic separation, and the residual material is the ultra-high-purity negative pole piece. The positive and negative pole pieces obtained by the method are high in purity, and the positive pole material in the positive pole piece keeps an original crystalline phase structure and can be directly used as a raw material for regeneration and repair.

The invention discloses a preparation method of niobium-tungsten alloy spherical powder and a 3D printing method of the niobium-tungsten alloy spherical powder, and belongs to the technical field of refractory metal material preparation.The preparation method comprises the steps that niobium, tungsten, molybdenum and zirconium refractory metal raw materials are smelted to obtain cast ingots with uniform components, and hydride powder is formed after hydrotreating and mechanical crushing; spherical powder is prepared by adopting a plasma spheroidizing technology, then dehydrogenation is performed for 1-3 hours at the temperature of 450-750 DEG C, magnesium powder is added, treatment is performed for 2-5 hours in an inert atmosphere at the temperature of 800-1100 DEG C, and finally the low-oxygen niobium-tungsten alloy spherical powder with the oxygen content lower than 120 ppm is obtained. Compared with a traditional process, the spheroidizing treatment is innovatively carried out before the dehydrogenation and oxygen reduction process, the deoxidation efficiency is improved through the relatively small specific surface area of spherical powder, and oxygen content control is achieved in combination with magnesium powder heat treatment. The problems of high oxygen content and low powder yield in a traditional process are solved, and material support is provided for high-performance niobium-tungsten alloy components in the fields of aerospace, nuclear power and the like.

The invention relates to the technical field of gelling materials, in particular to a gelling material based on high-doping-amount shield muck and a preparation method and application thereof.The preparation method comprises the following steps that after original shield muck is sequentially subjected to mechanical crushing, forced homogenization and drying to constant weight, gradient heating calcination is conducted, then rapid cooling is conducted immediately, and the high-doping-amount shield muck is obtained; carrying out two-stage ball milling and sieving to obtain active shield muck powder; preparing a solid dry blend; preparing a composite alkali activator solution; and mixing the composite alkali activator solution with the solid dry blend, primarily stirring and infiltrating, adding the residual mixing water, stirring to obtain uniform geopolymer slurry, and compacting and molding to obtain the cementing material. The problems that in the prior art, a high-performance geopolymer cementing material based on shield muck is low in activity, insufficient in strength, small in shield muck mixing amount, single in performance and poor in volume stability are solved.

The invention relates to the technical field of solid waste treatment, in particular to a fan blade recycling system and method. The technical problem that in the prior art, fan blades are recycled through a mechanical crushing method, and consequently recycled reinforced fibers are short in length is solved. The invention provides a fan blade recovery system which comprises a crack forming device used for applying vibration and mechanical pulse with preset frequency to a fan blade so as to form microcracks on a resin interface between adjacent fiber layers in the fan blade; and the splitting device is arranged at the downstream of the crack forming device and is used for applying stripping composite stress to the fan blade, so that the fan blade is separated at the micro crack, and fiber bundles and resin matrix fragments are obtained.

The invention discloses a method for preparing a reinforced epoxy resin composite material from a retired fan blade, and belongs to the technical field of recycling of composite materials. The method comprises the following steps: carrying out mechanical crushing and screening on the retired fan blade to obtain non-metal powder; preheating epoxy resin, sequentially adding the nonmetal powder, the defoaming agent and the coupling agent, stirring, and vacuumizing to obtain a mixed system a; adding a curing agent and titanium dioxide powder into the mixed system a, stirring and vacuumizing to obtain a mixed system b; and finally, pouring the mixed system b into a mold coated with a release agent, curing at normal temperature, and demolding to obtain the reinforced epoxy resin composite material. According to the invention, high-value utilization of components such as glass fibers in the retired wind power blade is realized; the process is simple, equipment requirements are low, and industrial popularization potential is achieved.

The invention discloses a graphite negative electrode material with excellent high-temperature cycle performance and a preparation method thereof, and belongs to the field of lithium battery negative electrodes, and the preparation method comprises the following steps: carrying out mechanical crushing and intermittent shaping on raw material coke to obtain coke powder with a particle size D50 of 6-20 [mu] m and a tap density of 0.6-1.2 g / cm < 3 >, and carrying out first heat treatment on the coke powder to obtain a pre-carbonized material; and placing the pre-carbonized material in a crucible furnace or a box-type furnace, carrying out second heat treatment to obtain a graphitized material, naturally cooling the graphitized material to room temperature, and screening and demagnetizing the graphitized material by using a 300-mesh vibrating screen classifier to obtain the high-temperature-resistant long-circulation graphite negative electrode material. The cost and the performance can be adjusted as required by using diversified raw material sources, and the trend of green chemistry and sustainable development is met. The graphite negative electrode material disclosed by the invention has high-temperature stability, long cycle life, excellent electrochemical performance and structural stability.

The invention discloses a preparation method of silicon dioxide for a powder coating, and belongs to the technical field of precipitation method silicon dioxide preparation, a sodium silicate solution with a specific modulus is selected to be prepared into a proper concentration, and a large amount of silicic acid is generated in the solution in combination with a specific proportion, temperature and early-stage rapid acid adding mode; a large number of uniform primary silicon dioxide particles can be quickly formed, the silicon dioxide particles with high specific surface area and high surface energy are finally separated out, and the growth and aggregation of the silicon dioxide particles are effectively controlled in a manner of slowly adding acid according to a specific proportion and temperature subsequently, so that the silicon dioxide aggregate with uniform particle size is formed; the water-soluble amino acid is added into the silicon dioxide slurry, so that the silicon dioxide particles are endowed with charge property, the finally dried silicon dioxide powder can be directly used in the powder coating, mechanical crushing is not needed again, the energy consumption is reduced, a surfactant is not needed, the influence on the environment in the production process can be avoided, and the method is energy-saving and environment-friendly.

The invention discloses a method for separating a positive electrode active material and a current collector of a waste lithium ion battery, and belongs to the technical field of recycling of the waste lithium ion battery. The method comprises the following steps: discharging and disassembling the waste lithium ion battery pack, and mechanically crushing to obtain a positive electrode current collector loaded with an active material; and activating the positive current collector loaded with the active material by adopting an aqueous solution containing an activating agent, adjusting the pH value of the system to be acidic, adding a positive separating agent to form an interface layer with the positive current collector, stripping, filtering, sorting and drying to obtain the positive current collector and the positive active material. The wettability of the positive electrode active material is improved by adopting the activating agent, so that hydrogen ions and the positive electrode separating agent can enter the aluminum foil layer to form a new interface layer, and the positive electrode active material is stripped. The method is high in separation efficiency, simple and convenient to operate and free of damage to the positive electrode active material.

The invention relates to the technical field of fluidized beds, in particular to a fluidization coating device with pulse, stirring and double-particle triple synergy, which comprises a spray fluidized bed reactor, a fluidized bed reactor, a stirring device and a double-particle fluidized bed reactor, the gas distributor is positioned above the carrier gas inlet and is used for uniformly distributing carrier gas entering from the carrier gas inlet on the whole bed layer to form fluidized gas; the gas-liquid two-phase flow nozzle is connected with the gas supply unit and the coating liquid conveying tank and is used for atomizing the coating liquid into micron-sized small liquid drops and then spraying the micron-sized small liquid drops into the spray fluidized bed reactor; the mechanical shearing unit continuously generates local mechanical crushing on the aggregate; the pulse air inlet device is connected with the air supply unit and is used for applying periodic pulse airflow to the fluidized bed layer and breaking particle aggregation and channeling formed during initial fluidization; and the flow aiding particles and the fine powder particles to be coated jointly form a double-particle fluidization system. The problems of difficult fluidization starting, non-uniform fluidization and the like of ultrafine powder particles are solved through triple synergy of pulse, stirring and double particles.

The invention discloses ultrasonic extraction equipment for caffeine in tea leaves, which comprises a kettle body and a vibration box hoisted at the axis of the inner side of the kettle body, a plurality of uniformly distributed ultrasonic generators are arranged in the vibration box, the bottom of the inner side of the kettle body is fixedly connected with a grinding disc, and an opposite grinding piece is movably arranged at the position, deviating from the axis, above the grinding disc. By combining ultrasonic treatment with mechanical crushing, the crushing efficiency and the crushing degree of tea leaves are improved, the stirring piece can move in the direction of the supporting rod, the tea leaves floating on the liquid level or above can be conveyed downwards in cooperation with the blade design and the rotating motion of the stirring piece, meanwhile, materials at the bottom are overturned upwards to be homogenized, and the crushing efficiency is improved. The movement of the opposite-grinding piece can push tea leaves, avoid material accumulation, prevent repeated grinding of the same batch of tea leaves, and realize functional linkage of grinding operation, material collection and pushing, stirring and directional material conveying under the same driving traction, so that the tea leaves can be uniformly dispersed, and the tea leaves can be fully decomposed under the action of high-frequency sound waves.

The invention provides atomized silver powder and a preparation method thereof, and belongs to the technical field of metal powder preparation. According to the preparation method, through the synergistic effect of atomization powder preparation, two-step ball milling and mechanical crushing, two kinds of mixed state silver powder which is wide in particle size distribution, uneven in surface and irregular in edge and is in a thick sheet shape and a small-particle sphere-like shape are prepared. According to the method, more satellite spherical micron silver powder particles are prepared by controlling gas atomization powder preparation, then the large-particle satellite spherical silver powder is ground into sheets and is prevented from being scattered into small spherical particles through a primary flaking process and large-ball slow grinding, and in a secondary flaking process, small-ball quick grinding is added, so that the large-particle satellite spherical silver powder is prepared. According to the method, the silver powder of the middle size is rapidly ground into sheets, meanwhile, the form of the small-particle spherical silver powder is prevented from being damaged, finally, the surface of the sheet-shaped silver powder is modified through mechanical crushing, the target silver powder is obtained, a pure physical powder preparing technology is adopted, the production cost is low, environment friendliness is achieved, the batch stability is good, and the method can be directly used for electronic paste.

The invention discloses a traditional Chinese medicine preparation method combining ultrasonic waves and directional enzymolysis, and relates to the technical field of traditional Chinese medicine preparation, and the method comprises the following steps: S1, raw material pretreatment: cleaning and drying traditional Chinese medicinal materials, and crushing the traditional Chinese medicinal materials to 20-100 meshes by using mechanical crushing equipment to obtain crushed materials; s2, ultrasonic pretreatment: mixing the crushed material obtained in the step S1 with water according to a mass-volume ratio of 1: 5 to 1: 8 to form an extraction water bath; an ultrasonic generator is adopted to conduct pretreatment on the extraction water bath, the ultrasonic frequency is 20-40 kHz, the power is 300-800 W, the treatment temperature is 30-60 DEG C, and the treatment time is 10-40 minutes. According to the method, cell structures of the traditional Chinese medicinal materials are efficiently disintegrated through the synergistic effect of cavitation effect physical wall breaking of ultrasonic waves and biological directional enzymolysis of the compound enzyme, so that the extraction rate of target effective components such as astragaloside, total flavonoids and polysaccharides is remarkably increased, meanwhile, dissolution of impurities is reduced due to specificity of enzymolysis reaction, and the quality of the traditional Chinese medicinal materials is improved. Therefore, the traditional Chinese medicine extract with higher purity and better color is obtained.

The invention belongs to the technical field of plastic recycling, and particularly relates to a plastic recycling device and method.The plastic recycling device comprises a conveying belt, an air blower and a plastic collecting box, the air blower can blow the surface of the conveying belt, a discharging part is fixedly connected to the plastic collecting box, and a cotton plate is fixedly connected to the plastic collecting box; the conveying belt is located on the upper side of the plastic collecting box in an inclined angle posture, the front baffles are fixedly connected to the front side and the rear side of the plastic collecting box, and the arc-shaped cotton block is fixedly connected to the plastic collecting box. The method comprises the following steps: 1, mechanically crushing mixed recycled materials containing plastics and iron blocks, such as waste computer cases and household appliance shells, so as to form a fragment mixture; plastic can be efficiently and stably recycled from materials of the plastic and metal iron blocks, and convenience is brought to the recycling process.

The invention provides a high-pressure dustproof device for mine slope cutting mechanical crushing, comprising: two bases symmetrically fixed on both sides of a crushing hammer body; the rack and the working end of the breaking hammer are coaxially arranged, and the rack is in sliding connection with the base; the limiting dust blocking unit is composed of a plurality of water curtain spray heads, fixed to the rack and annularly distributed around the breaking hammer; the regional dust falling unit consists of a plurality of atomizing nozzles, is fixed on the rack, is positioned in the limiting dust blocking unit, and is annularly arranged around the breaking hammer; the liquid supply assembly is connected with the limiting dust blocking unit and the regional dust falling unit and provides dust falling solution for the limiting dust blocking unit and the regional dust falling unit. According to the technical scheme, the double dust falling effect of outer-layer blocking and inner-layer purification is achieved, the dust concentration of a crushing operation area is greatly reduced, the construction environment is improved, dust pollution is reduced, and the environmental protection property and safety of mine operation are improved.

This invention provides a method for recovering copper from waste circuit boards, belonging to the field of waste circuit board recycling technology. The method for recovering copper from waste circuit boards according to this invention includes the following steps: (1) Crushing and sorting: mechanically crushing and sorting the waste circuit boards to obtain copper-enriched metal particles; (2) Pre-leaching: mixing the metal particles with a dilute sulfuric acid solution to perform a pre-leaching reaction, obtaining pre-leaching residue and pre-leaching solution; (3) Electrolytic deposition: using the pre-leaching solution as an electrolyte for electrolytic deposition to obtain high-purity copper deposits; (4) Post-treatment: washing and drying the copper deposits to obtain recovered copper. The entire recycling process of the technical solution described in this invention does not generate harmful gases or wastewater, resulting in minimal environmental pollution. Furthermore, this invention allows for copper leaching and electrodeposition within the same device, shortening the process flow and reducing energy consumption.

The present invention discloses a method for magnetic separation of waste lithium-ion battery pole pieces. The waste lithium-ion batteries are subjected to mechanical crushing, preliminary magnetic separation, air separation, and screening to obtain large-scale mixed positive and negative pole pieces. The large-scale mixed positive and negative pole pieces are then pre-magnetized to enhance their magnetic differences. Ultra-high-purity positive pole pieces are then separated through weak magnetic separation, followed by strong magnetic separation to separate the mixed positive and negative pole pieces. The remaining material is the ultra-high-purity negative pole piece. The positive and negative pole pieces obtained by the method of the present invention are of high purity, and the positive electrode material in the positive pole piece retains its original crystalline structure, making it suitable for direct use as raw material for regeneration and repair.

The present application relates to the technical field of cementitious materials, in particular to a cementitious material based on large amount of shield muck and a preparation method and application thereof, comprising the following steps: the original shield muck is sequentially subjected to mechanical crushing, forced homogenization, drying to constant weight, gradient temperature calcination, rapid cooling immediately after, two-stage ball milling and sieving to obtain active shield muck powder; preparing solid dry mixture; preparing composite alkali activator solution; mixing the composite alkali activator solution with the solid dry mixture, preliminarily stirring and soaking, adding the remaining mixing water to stir to obtain uniform polymer slurry, then vibrating and forming to obtain the cementitious material. The present application solves the problems of low activity, insufficient strength, small amount of shield muck, single performance and poor volume stability of the high-performance geopolymer cementitious material based on shield muck in the prior art.

The invention discloses a rapid and environment-friendly dismantling method for an existing caisson, and relates to the technical field of caisson dismantling, the rapid and environment-friendly dismantling method comprises the following steps: S1, an early-stage preparation stage; s11, a breast wall breaking stage; s12, a sludge, accropode and block stone cleaning stage; s2, a stage of digging out the backfill in the box chamber in an ear-digging manner; s3, a fishing operation stage; and S4, in the stage of mechanically dismantling the caisson and discarding the muck, a hoisting tool for dismantling the caisson of the crane ship and a hoisting hole rapid plug pin deepening technology are used, and through fine design and optimization, the hoisting process is more stable and rapid, and the construction period is greatly shortened. Compared with traditional blasting, mechanical crushing and other methods, the technology has the advantages that noise and vibration in the construction process are reduced, damage to the surrounding environment is reduced, waste generated by dismantling is classified, treated and recycled, and pollution to the environment and waste of resources are reduced.

The invention relates to the technical field of industrial wastewater treatment and resource recovery, and discloses high-organic-matter high-salt mother liquor drying equipment and a drying process, the high-organic-matter high-salt mother liquor drying equipment comprises a preheating kettle, a first-stage drying kettle, a second-stage drying kettle and a condensation recovery system which are connected in sequence; a ventilated hollow rotating shaft and stirring blades are arranged in the second-stage drying kettle, a crushing roller and a sealing assembly are integrated in a discharging pipe, a radar liquid level meter is arranged at the top of each kettle body, secondary steam generated by first-stage drying is introduced into the hollow rotating shaft of the second-stage drying kettle to serve as a heat source, and materials are deeply dried in a negative pressure environment. Through heat energy gradient utilization and hollow shaft contact type heating, the heat efficiency is improved, and high-temperature coking of materials is prevented; the problem that high-salt solid blocks and blocks a pipeline is solved by utilizing a mechanical crushing structure at a discharging position; and continuous automatic operation of the production process and zero discharge of cleaning wastewater are realized by combining liquid level interlocking control and a cleaning water recycling strategy.

The invention discloses a concrete plate production device added with a plate reinforcing agent, and relates to the technical field of building material production, the concrete plate production device comprises a supporting mechanism, a moving mechanism, a bench formwork and a material distribution mechanism, and the top end of the supporting mechanism is slidably connected with the moving mechanism for longitudinal movement; a bench formwork used for bearing concrete for plate production is arranged at the bottom end of the supporting mechanism, a distributing mechanism is slidably connected to the top end of the moving mechanism, and a discharging mechanism used for feeding raw materials to the bench formwork is arranged at the bottom end of the distributing mechanism. Meanwhile, the material guide pipe does variable-radius spiral motion along the track of the vortex-shaped groove, and a three-dimensional vortex flow field is formed in combination with three-dimensional stirring of the stirring paddle, so that reinforcing agent particles are diffused in a concrete matrix in a gradient concentration mode (distributed from the core to the periphery in a decreasing mode), and the local enrichment phenomenon is effectively overcome; and meanwhile, the double-screw extruder mechanically crushes the reinforcing agents easy to agglomerate, such as steel fibers, so that initial agglomerates are eliminated.

The invention discloses an in-situ synthesis catalytic phase reinforced magnesium-based hydrogen storage composite material and a preparation method thereof.The preparation method comprises the steps that firstly, magnesium, magnesium-nickel intermediate alloy and magnesium-gadolinium intermediate alloy raw materials are weighed according to the chemical composition of Mg < 96.5-x > Ni < 3.5 > Gdx, wherein x is larger than or equal to 1 and smaller than or equal to 3, drying and smelting are conducted, and a magnesium-based alloy ingot is obtained; 2, mechanically crushing into alloy powder; 3, carrying out hydrogenation reaction to obtain hydrogenated alloy powder; and 4, carrying out dehydrogenation reaction to obtain the in-situ synthesis catalytic phase reinforced magnesium-based hydrogen storage composite material. The in-situ synthesized catalytic phase reinforced magnesium-based hydrogen storage composite material is obtained by carrying out primary hydrogen absorption and hydrogen desorption on Mg96.5-xNi3.5 Gd, the in-situ synthesized catalytic phases Mg2Ni and GdH2 are utilized to improve the hydrogen absorption and desorption speed, so that the initial hydrogen desorption temperature is greatly reduced, meanwhile, excellent cycle stability is shown, the preparation process is simple and controllable, the preparation cost is low, and the preparation method is suitable for industrial production. The method is suitable for large-scale production.

The invention discloses a rotary disc type coal bunker cleaning device which comprises a supporting mechanism serving as a foundation of the whole device and used for overall walking, a rotary mechanism used for installing a supporting base and a rotary disc, a bunker cleaning mechanism arranged on the rotary disc and capable of rotating along with the rotary disc, and a power mechanism arranged on the rotary disc and capable of rotating along with the rotary disc. Power is provided for rotation of the wheel set assembly and the rotary disc, rotation of the adjusting assembly and the prime mover and movement along the supporting frame, and the control mechanism achieves precise adjustment and control over the working states of all the parts through a controller. According to the coal bunker cleaning device and the coal bunker cleaning method, by means of the collaborative bunker cleaning structure of mechanical crushing and high-pressure gas impact, the scraper drill bit directly drills into hardened coal and frozen coal to achieve physical crushing, meanwhile, the air outlet holes of the high-pressure gas impact assembly can jet high-pressure gas, coal hung on the bunker wall and coal accumulated at the bunker bottom can be quickly loosened, and the phenomena of coal fluffing and bridging are effectively eliminated.

The utility model discloses a coral soil subbase layer construction device which comprises a base, two rotating plates are symmetrically installed on the two side walls of the base, one ends of the two rotating plates are connected with a mixing box through supporting rods, and a rotating shaft is arranged on the lower portion of one side in the mixing box. The crushing device has the beneficial effects that through the design of the crushing roller and the motor II, when coralline soil and cement are mixed, the crushing roller mechanically crushes hard super-particle-size materials in the coralline soil and the cement, and the particle size of the hard super-particle-size materials is adjusted to be within a range meeting engineering requirements; or the strength, durability and stability of the material can be improved by adopting a method of adding a curing agent into the mixture by adopting a liquid storage tank, the uniformity and stability of a foundation are ensured, and meanwhile, when cement and coralline soil are mixed, a crushing cutter rotates in a mixing tank and is matched with contact of the mixing cutter and hard bristles, so that the mixing efficiency is improved. The cleaning effect of the hard bristles on the mixing cutter can be achieved, coral soil or cement is prevented from adhering to the mixing cutter, and the mixing effect of the mixing cutter is guaranteed.

The invention relates to a long-pulse ultrasonic cavitation and instantaneous pressure relief device and method based on multi-field coupling. The device comprises a shell, a tube plate, a heat exchange tube, an ultrasonic transducer, a heat source inlet, a heat source outlet, an S tube, a hydraulic piston, a middle material box, a high-pressure-resistant quick-opening movable door, a material collecting box and a conveying cylinder. The invention aims to overcome the common problems of high energy consumption, low efficiency, serious environmental pollution, uncontrollable damage to the primary structure of the material and the like in the existing material treatment technology (such as mechanical crushing, chemical leaching and traditional heat treatment), and has the advantages of high efficiency, rapidness, greenness, low consumption, complete structure preservation, accuracy, controllability, intrinsic safety and the like; the engineering implementation bottlenecks of difficulty in continuous conveying of high-solid-content materials, fatigue failure of a sealing structure under high-frequency vibration, complexity in multi-physical-field parameter cooperative regulation and control and the like are solved, the technical limitation that transmission attenuation of ultrasonic energy in a high-viscosity system is large is broken through, and the application range is expanded to a complicated and difficult-to-treat material system.

The invention discloses a hydrolysis hydrogen production material based on alloying modification of a low-quality waste magnesium alloy and a preparation method and application of the hydrolysis hydrogen production material, and belongs to the technical field of remelting and reutilization of hydrogen production materials and waste magnesium alloys. The preparation method comprises the following steps that 1, pure nickel powder is subjected to tabletting forming at the room temperature and mechanically crushed into fine long-strip-shaped nickel strips; secondly, the low-quality waste magnesium alloy, the magnesium-calcium intermediate alloy and the fine nickel strips are smelted in a resistance furnace, and the smelting temperature ranges from 730 DEG C to 750 DEG C and is far lower than the melting point temperature of nickel; and thirdly, the alloy melt is cast into a preheated stainless steel mold, and the surface covering agent is removed after demolding. The preparation process is simple, the cost is low, the consumed time is short, smelting preparation and recycling of the low-quality waste magnesium alloy can be achieved at the low temperature, the as-cast alloy can be used for rapidly preparing a large amount of hydrogen, the conversion rate is high, and the method is suitable for industrial production.

The utility model provides a mechanical breaking hammer for aqueduct dismantling, and relates to the technical field of mechanical breaking hammers. A dust collection assembly; the dust collection assembly comprises a connecting frame fixedly connected to the bottom end of the outer side of the crusher, vent holes are formed in the connecting frame, a centrifugal suction fan is installed on the outer side of the crusher, and the input end of the centrifugal suction fan is fixedly connected with an air suction pipe; a water spraying assembly; the water spraying assembly comprises an air inlet pipe fixedly connected to the output end of the connecting frame. The end, away from the vent hole, of the air inlet pipe is fixedly connected with a water storage tank. According to the design, through the negative pressure effect of the centrifugal suction fan, dust generated in the crushing operation process is effectively sucked in time and cleaned through the filter screen cover, the concentration of the dust in the operation environment is greatly reduced, then through the design of the water storage tank and the atomization spray head, the operation area of the crushing head is covered with the spraying layer, and the dust removal efficiency is improved. Diffusion of dust in the air is further reduced, and the environment-friendly dust falling effect is achieved.

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.