348 results about "Mechanical crushing" patented technology

A diffusion preparation method of a Fe-rich high-coercivity samarium-cobalt magnet belongs to the technical field of magnetic material preparation, solves the technical problems that the Fe-rich samarium-cobalt magnet is not easy to form a good cellular structure and the process flow is long, and comprises the following steps: S1, weighing a samarium-cobalt permanent magnet alloy raw material, and preparing an alloy ingot; s2, alloy particles are prepared through a mechanical crushing method, and the alloy particles are prepared into alloy powder; s3, the samarium-cobalt alloy powder is subjected to magnetic field orientation forming and cold isostatic pressing forming, and a green body is prepared; s4, performing sintering solution treatment on the green body to prepare a sintered samarium-cobalt permanent magnet blank, and processing the blank into a samarium-cobalt magnet sheet; s5, performing primary PrCu diffusion treatment on the samarium-cobalt magnet sheet; s6, the magnet sheet is subjected to secondary SnFe diffusion treatment; and S7, performing aging treatment on the secondary diffusion sheet to obtain the samarium-cobalt permanent magnet. The preparation method provided by the invention is easy to operate, control and industrialize, and the prepared Fe-rich sintered samarium-cobalt magnet is excellent in performance.

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 belongs to the field of electronic wastes, and particularly relates to a waste circuit board recycling and reusing method which comprises the following steps: step 1, a preliminary decomposition stage of a waste circuit board: decomposing the waste circuit board into fragments suitable for follow-up treatment through a mechanical crushing and screening physical method; 2, a chemical leaching stage: dissolving metal components in the waste circuit board from the fragments by using a chemical solvent; 3, a metal recovery and separation stage: reducing metal ions dissolved in the solution into metal by adopting an electrolytic method; step 4, a harmful substance removal stage: removing harmful substances in the waste circuit board; 5, a resource reutilization and comprehensive utilization stage: through a recovery system unit, the recovered metal, plastic substrates and electronic component materials are extracted and utilized, and a feedback control system optimizes the resource recovery efficiency according to real-time data; and step 6, closed-loop treatment and environment-friendly compliance stage: treating wastewater, waste gas and solid waste through a closed-loop system unit.

The invention relates to a high-capacity Mg-RE (Ce, Y)-Sc-A < l-Ca >-based solid hydrogen storage alloy for a fuel cell and a preparation method thereof, the hydrogen storage alloy comprises the following components: Mg95-x-yCexYySc0.5 A < 4.5-z > Caz + m wt.% (NbF5 + V2O5), x, y and z in the formula are atomic ratios, 0.5 < = x < = 2, 0.5 < = y < = 2, 0.5 < = z < = 3, m is the percentage of NbF5 + V2O5 in the alloy, 2 < = m < = 8, and the mass ratio of NbF5 to V2O5 is 1: 1. The preparation method comprises the following steps: carrying out induction heating smelting under the protection of inert gas, and injecting molten alloy into a copper casting mold to obtain an alloy ingot; after the cast ingot is put into a quartz tube to be subjected to induction heating melting, under the pressure action of inert gas, liquid alloy continuously falls on the surface of a rotating water-cooling copper roller in a jetting mode, and rapid quenching alloy of a nanocrystalline microstructure is obtained; and the rapidly quenched alloy is subjected to mechanical crushing and sieving, and then is subjected to ball milling together with catalysts NbF5 and V2O5 in a high-purity argon gas environment, so that the ultrafine grain alloy powder is obtained. Through component design, microstructure regulation and control and addition of a multi-element catalyst, the thermal stability of alloy hydride is reduced, and the hydrogen absorption and desorption thermodynamic and dynamic performance of the alloy 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 relates to the technical field of mineral crushing, and particularly discloses a mechanical and hydraulic combined type crushing and collecting device for underwater minerals and a using method.The mechanical and hydraulic combined type crushing and collecting device comprises a conveying mechanism, the conveying mechanism comprises a conveying bin, a first side wall and a second side wall, a first driving motor is fixedly installed on one side face of the conveying bin, and a driving rotating roller is arranged in a second conveying belt; the crushing mechanism comprises a mechanical crushing assembly and a hydraulic crushing assembly, and the mechanical crushing assembly comprises an extension plate arranged on the first side wall and a fixed crushing arm fixedly mounted at one end of the top plate; according to the device, by arranging a mechanical crushing assembly with a fixed crushing arm and a movable crushing roller and a hydraulic crushing assembly for driving a jet pump and a hydraulic crushing output end, ores can be crushed into particles, a bearing plate can continuously shake the ores, and shaking stones can be uniformly crushed in cooperation with high-pressure water flow; and insufficient crushing of hydraulic equipment caused by accumulation of conveyed stones is prevented.

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 relates to multi-roller continuous mining equipment suitable for a large mine, and belongs to the technical field of mining equipment. Comprising a rack base plate, a lower cutting device and an upper cutting device, crawler side chassis are symmetrically and fixedly arranged on the left side and the right side of the rack base plate, crawler walking devices are fixedly connected to the outer sides of the crawler side chassis, side supporting plates are fixedly connected to the upper ends of the crawler side chassis, and a rack top plate is fixedly connected to the upper ends of the side supporting plates; two sets of discharging grooves distributed left and right are formed in the upper surface of the top plate of the rack in a penetrating mode. The method has good adaptability, can adapt to various ore types, and is not limited by ore body shapes and geological conditions. And the rocks are mechanically crushed, so that the potential safety hazards such as vibration, flying rocks and noise during blasting operation are avoided, and the operation safety is greatly improved. By arranging the lower cutting device and the upper cutting device and adopting a mining mode of synchronously and continuously breaking rocks in an upper area and a lower area, rock breaking operation can be carried out in multiple areas at the same time, and the ore breaking efficiency is greatly improved.

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 discloses recycled aggregate concrete and a preparation method and application thereof, and belongs to the technical field of environment-friendly building materials, the recycled aggregate concrete comprises the following raw materials by weight: 250-270 parts of cement, 1800-1900 parts of silicate modified recycled aggregate, 100-110 parts of fly ash, 0.5-1.5 parts of a water reducer, and 140-150 parts of water. The method comprises the following steps: soaking the waste concrete in water for wetting, freeze-drying, and mechanically crushing until the particle size is 5-25mm; and screening to remove impurities, washing, soaking in alkali liquor for 2-4 hours, adding into a micro-powder silicate solution, and wrapping for 0.5-1 hour to obtain the silicate modified recycled aggregate. By optimizing the treatment method and the mix proportion design of the recycled aggregate, the key technical problem of application of the recycled aggregate in concrete is solved, and a green and low-carbon cyclic utilization scheme is provided for bridge engineering waste.

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 a magnesium-based composite material with high hydrolysis hydrogen production conversion rate and a preparation method thereof, belonging to the technical field of hydrogen production materials and their preparation processes. The preparation method comprises the following steps: step 1, preparing a Mg-Ca binary alloy; step 2, mechanically crushing the obtained Mg-Ca binary alloy to obtain Mg-Mg 2 Ca alloy particles; step three, then in Mg-Mg 2 Mg-Mg 2 Ca-composite metal carbide-Ni composite powder; Step 4, Mg-Mg 2 The Ca-composite metal carbide-Ni composite powder is placed in a tableting mold and pressed into a block or sheet material using a tablet press to obtain a magnesium-based composite material with a high hydrolysis hydrogen production conversion rate. The preparation process of the present invention is simple, low in cost, and short in time. The composite material can quickly prepare a large amount of hydrogen with a high conversion rate and is suitable for industrial production.

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 provides magnetic powder and a shaping method and application thereof, and the shaping method comprises the following steps: sequentially carrying out first heat treatment and ball milling on the magnetic powder to obtain ball-milled magnetic powder; the ball-milled magnetic powder is sequentially subjected to acid etching and second heat treatment, shaping is completed, and shaped magnetic powder is obtained; the shaping method can effectively remove sharp corners caused by mechanical crushing of the magnetic powder by improving the processing characteristics of the magnetic powder, performing ball-milling shaping and performing microcosmic repair, and finally obtaining the magnetic powder which is high in sphericity degree, smooth in surface and free of sharp corners, so that the density, the loss and the direct current superposition characteristics of the magnetic core are effectively improved.

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.