137results about How to "Small granularity" patented technology

The invention discloses a method for preparing nano cerium oxide through supergravity reinforcement, which comprises the following steps: 1) completely dissolving cerium chloride hexahydrate serving as a cerium source with deionized water to prepare a cerium chloride solution; (2) inputting the cerium chloride solution into a supergravity reactor through a peristaltic pump at normal temperature, then inputting ammonia water into the supergravity reactor through a constant-flux pump, and carrying out premixing reaction in the supergravity reactor to form mixed slurry; and 3) after the premixing reaction is finished, taking out the mixed slurry, and carrying out suction filtration, washing, drying and high-temperature oxidation calcination to obtain the nano cerium oxide. According to the method, the production efficiency can be improved, the particle size of the prepared nano cerium oxide is small, the particle size distribution is narrowed, and the crystallinity of crystals is improved.

The invention relates to the technical field of lithium iron phosphate grinding, in particular to a grinding device for lithium iron phosphate production and a grinding method.The device comprises a tank body, a driving assembly and a first grinding assembly, a tank cover is installed at the top of the tank body, the driving assembly comprises a driving motor installed at the top of the tank cover, and a rotating shaft is fixedly arranged on an output shaft of the driving motor; the rotating shaft vertically extends into the tank body, the first grinding assembly is installed on the rotating shaft and comprises a first grinding seat, the first grinding seat is rotationally connected to the rotating shaft in a sleeving mode, the peripheral wall of the first grinding seat is fixedly arranged on the inner wall of the tank body, a conical groove is formed in the top face of the first grinding seat, and the rotating shaft is fixedly sleeved with a conical block; and a scraper is fixedly arranged on the peripheral wall of the conical block through a connecting block. According to the invention, the control capability on the granularity of the lithium iron phosphate material is improved, the uniform distribution of the granularity of the material is ensured, the problem of excessive grinding or insufficient grinding is avoided, the risk of material caking caused by the grinding wheel in the grinding process is reduced, and the grinding efficiency is improved.

The invention discloses a method for preparing anisotropic samarium-iron-nitrogen magnetic powder, and belongs to the technical field of magnetic materials, the method comprises the following steps: preparing Sm and Fe according to design components, and smelting to obtain samarium-iron alloy molten steel; casting the samarium-iron alloy molten steel onto a cooling roller to obtain an iron-samarium alloy sheet; the iron-samarium alloy sheet is placed in a vacuum heat treatment furnace to be subjected to homogenization treatment, the alloy sheet obtained after homogenization treatment is cooled to 200-300 DEG C, in the vacuum environment, hydrogen is introduced into the furnace, the absolute pressure of the hydrogen is controlled to be 0.05-0.1 MPa, and hydrogenation treatment is conducted for 2 h; after hydrogenation is completed, the temperature is increased to 400 DEG C, nitrogen is introduced to 0.5 MPa, the temperature is increased to 530 DEG C, then the furnace temperature is reduced to the room temperature, and the anisotropic samarium-iron-nitrogen magnetic powder is obtained.The preparation method of the samarium-iron-nitrogen magnetic powder has the advantages of being simple in preparation process, low in energy consumption, high in production efficiency, small in magnetic powder particle size, high in magnetic performance and good in magnetocrystalline anisotropy.

The present invention separates and purifies chitosan in shrimp by-products, and then prepares chitosan / collagen / plant essential oil multilayer nano composite microsphere emulsion, which is applied to sunscreen skin care products. The plant essential oil has sunscreen effect, chitosan has antibacterial and anti-inflammatory properties, and collagen can repair damaged skin. By controlling the extraction and purification process of chitosan, the molecular weight of chitosan is controlled, the homogeneity of chitosan is improved, and the antibacterial property of chitosan is improved. Through the form of multilayer nano composite microsphere emulsion, the plant essential oil is protected, the volatilization of the plant essential oil is reduced; the release rate of the plant essential oil is controlled, and a slow release effect is produced; the particle size of the effective ingredient is smaller and easier to be absorbed by the skin; at the same time, a component with waterproof performance is added to the sunscreen cosmetics, so that the sunscreen skin care products of the present invention have excellent sunscreen effect and waterproof performance.

The invention relates to the technical field of aluminum nitride powder preparation, and particularly discloses an aluminum nitride powder preparation device and a preparation process thereof.The aluminum nitride powder preparation device comprises a bottom plate, two mounting frames are fixedly mounted on the top face of the bottom plate, and a rotating frame is rotatably mounted between the two mounting frames through a rotating shaft; mounting shafts are rotationally mounted on the two opposite inner walls in the rotating frame, and the ends, close to each other, of the two mounting shafts are jointly and fixedly connected with a rotating ring which is obliquely arranged. The grinding barrel is driven by the switching assembly to adjust inclination around the axis center of the grinding barrel, so that raw material powder can be sequentially subjected to step-by-step ball milling in the two grinding cavities, the particle size of the raw material powder is rapidly reduced under the action of a large grinding medium, the total ball milling time is shortened, and the cold welding phenomenon is reduced; and the raw material powder is subjected to high-precision ball milling through a small grinding medium, so that the raw material powder is further refined, the influence of cold welding on the ball milling quality is reduced, and the agglomeration phenomenon is reduced.

The invention belongs to the technical field of quartz sand preparation, and discloses high-purity quartz sand and a preparation method thereof. The method comprises the following steps: by taking water, mixed alkali and silicon powder as raw materials, uniformly stirring the silicon powder, the water and an additive to prepare silicon sludge, adding the rest raw materials into a reaction kettle, heating, then adding the silicon sludge into the reaction kettle in a frequency division manner, reacting to obtain a sodium silicate solution, removing anion and cation impurities, then adding an acid solution, heating to obtain silicic acid gel, and drying to obtain the silica gel. The silicic acid gel is subjected to freezing treatment, vacuum microwave drying and chloridizing roasting after unfreezing are conducted, and the high-purity quartz sand is obtained. According to the preparation method, the quartz sand with the purity higher than 99.9999% can be synthesized, the granularity of the quartz sand can be controlled according to the adding proportion of the acid solution, the content of gas-liquid inclusion in the quartz sand is remarkably reduced, and the quality of the quartz sand is improved.

The invention discloses a method for preparing nano vaterite calcium carbonate from carbonized carbide slag. The method comprises the following steps: 1) pretreatment of raw materials: drying the carbide slag, and grinding the carbide slag into powder for later use; 2) leaching: mixing the carbide slag, ammonium chloride and deionized water, stirring at normal temperature, reacting, and filtering to obtain filter residue and calcium-containing filtrate; and 3) carbonization reaction: introducing the calcium-containing filtrate obtained in the step 2) into an external circulation supergravity reactor, introducing CO2 gas at the same time, carbonizing at normal temperature, and filtering, washing and drying to obtain the nano vaterite type calcium carbonate. The method aims at the problems that in an existing process for preparing vaterite calcium carbonate from carbide slag, product particle size distribution is large, production efficiency is low, and additives are needed, and nano vaterite type calcium carbonate with the small particle size (50-80 nm) and uniform distribution can be efficiently prepared.

The invention discloses a ball mill with a dustproof structure for producing amino acid from poultry feathers, and relates to the technical field of ball mills. The device comprises a shell, the outer side face of the shell is rotationally connected with the inner side face of a groove plate, end covers are connected to the two ends of the shell through bolts, a transmission assembly is fixedly connected with the top of a bottom plate, the outer side face of a discharging pipe is fixedly connected with the inner side face of the shell, and the side, away from the shell, of the discharging pipe is bent towards the side, close to the bottom plate, of the discharging pipe; the end, away from the shell, of the discharging pipe is in a flat opening shape, the outer side face of the discharging pipe is fixedly connected with a fixing frame, the side, away from the discharging pipe, of the fixing frame is fixedly connected with the top of the bottom plate, the discharging pipe is in the flat opening shape bent downwards, ground feathers can be sprayed out downwards, flying dust is not prone to being generated, gaps of the flat opening shape are small, and the area is not changed. And the material spraying flow speed can be increased, the material spraying volume cannot be affected, smooth discharging can be conducted, and blockage is avoided.

The invention provides a meteorological data rendering method and system, a storage medium and electronic equipment. The method comprises the following steps: storing collected meteorological data through an Elasticsearch database; performing conversion processing on the meteorological data based on wind field UV data and a preset threshold value to obtain conversion data; performing slicing processing on the conversion data to generate grey-scale map slices; and rendering the grey-scale map slices in a WebGL mode of a browser to realize animation display of the meteorological data. According to the method, rendering is quicker, rendering bottleneck does not exist, gpu-based data real-time interpolation is easier to realize, and the data is smoother in a time sequence animation instead of a carousel graph form. Therefore, the data granularity can be reduced, the query and return of redundant data can be reduced, the data processing efficiency can be improved, and the technical problems of lagging and delay during dynamic rendering display of the meteorological data can be effectively solved.

The invention discloses a focusing method and device and a storage medium, and relates to the technical field of video image focusing, and the method comprises the steps: determining a to-be-focused target block in a current frame of video data and a plurality of target sub-blocks in the target block, and obtaining a to-be-focused region set, each target sub-block being obtained through the division of the target block; an image original pixel of the target block is acquired, a phase difference value of each to-be-focused area in the to-be-focused area set is determined based on the image original pixel, and each to-be-focused area comprises the target block and each target sub-block; and determining a target focusing area according to each phase difference value, and focusing the target focusing area. According to the method, the target block needing to be focused is further subjected to region division, and the phase difference values of the divided regions are evaluated, so that a better region of interest of the target block can be quickly focused in a complex scene, and the focusing efficiency and the imaging quality of the automatic focusing system are improved.

The invention belongs to the technical field of food processing, and provides a spina date seed peptide zinc chelate as well as a preparation method and application thereof. The spina date seed peptide zinc chelate is stable in performance and high in absorption efficiency. The preparation method comprises the following steps: degreasing a spina date seed medicinal material; preparing spina date seed protein; preparing spina date seed polypeptide; carrying out chelation reaction on the spina date seed polypeptide and zinc sulfate heptahydrate; and separating a chelation reaction product. The spina date seed peptide zinc chelate prepared by the invention can be directly used as a natural immunopotentiator to improve the immunity of a human body. The method has the advantages of short production cycle, low cost, no pollution to the environment, abundant nutrition, high protein content, small particle size, high safety and high utilization rate of effective components, and can be widely applied to the fields of foods, medicines and health care.

The invention discloses a slow-release temperature-controlled antifouling agent microsphere and a preparation method and application thereof, the method comprises the following steps: (1) mixing sodium alginate, copper pyrithione and a CaCl2 solution for reaction, freeze-drying, grinding and crushing to prepare intermediate product particles; and (2) mixing the intermediate product particles in the step (1) with a chitosan solution for reaction, then adding a glutaraldehyde solution for continuous reaction, and freeze-drying to obtain the antifouling agent microspheres. The sodium alginate and chitosan double-crosslinking preparation method adopted by the invention is novel, a double-layer drug-loading structure is constructed by virtue of the crosslinking effect of sodium alginate and calcium ions and the electrostatic interaction between anions and cations of sodium alginate and chitosan, and the thought is novel.

The crushing device comprises a machine body, a collecting hopper is arranged at the top end of the machine body, a collecting piece for collecting medicinal raw materials is arranged at the bottom end of the machine body, a crushing mechanism is arranged in the machine body, and the crushing mechanism comprises a crushing assembly, a rough grinding assembly and a fine grinding assembly; the crushing assembly, the rough grinding assembly and the fine grinding assembly are sequentially distributed in the machine body from top to bottom, the crushing assembly is used for preliminarily crushing medicinal raw materials, the fine grinding assembly is used for finely grinding the medicinal raw materials, the rough grinding assembly comprises two grinding blocks, a moving rod and a dull polish plate, and the moving rod is connected to the ends of the grinding blocks; the two grinding blocks are oppositely arranged, the two grinding plates are connected to the two opposite side walls of the two grinding blocks, the grinding plates are obliquely arranged, the distance between the two grinding plates is gradually reduced from top to bottom as a reference direction, and a driving assembly enabling the two grinding blocks to move in a staggered mode is arranged on the machine body. The crushing device has the effect of reducing the granularity of the crushing device.

The invention belongs to the technical field of rubber products, and provides silicone rubber for a composite insulator, a preparation method of the silicone rubber and the insulator, and the preparation method comprises the following steps: S1, mixing methyl vinyl phenyl silicone rubber and glycidyl methacrylate grafted silicone rubber in parts by weight, adding fumed silica and modified magnesium hydroxide, and uniformly stirring to obtain a silicone rubber mixture; continuously mixing, adding silicone oil, triethanolamine and a vulcanizing agent, stirring and mixing, and standing to obtain a mixed rubber material; s2, the mixed rubber material is put into an open mill to be mixed, a vulcanizing agent is added, thin passing and sheet discharging are conducted, standing is conducted, and rubber sheets are obtained; s3, putting the rubber sheet into a mold for molding, and then carrying out vulcanization reaction to obtain the silicone rubber material. The silicone rubber material provided by the invention has excellent mechanical property, flame retardant property, anti-aging property and electrical insulation property. Meanwhile, the preparation process is simple, raw materials are easy to obtain, cost is low, and wide application prospects are achieved.

The invention discloses a supported catalyst for acidic oxygen evolution reaction as well as a preparation method and application of the supported catalyst. The supported catalyst comprises a MnO2 nanofiber carrier and noble metal and / or noble metal oxide loaded on the surface of the carrier. The preparation method of the supported catalyst comprises the following steps: (1) dispersing a manganese source, ammonium persulfate and potassium sulfate in a first solvent, and carrying out a heating reaction to obtain MnO2 nanofibers; and (2) uniformly mixing the MnO2 nanofibers with a noble metal source dispersion liquid and molten salt, drying to obtain mixed powder, and calcining the mixed powder in an inert atmosphere to obtain the supported catalyst. The supported catalyst prepared by the method shows high catalytic activity under the condition of low noble metal loading capacity, the preparation cost of the catalyst is reduced, and the catalyst shows good durability under the specific morphology of the manganese dioxide carrier and the interaction between the manganese dioxide carrier and noble metal.

The utility model discloses a drying device for feed processing, which relates to the technical field of drying devices and comprises a drying cylinder and a base, a driving unit, a first sealing cover and a second sealing cover are mounted on the base, the first sealing cover and the second sealing cover are rotatably connected with two ends of the drying cylinder, a feeding pipe is mounted on the first sealing cover, and a discharging pipe is mounted on the second sealing cover. The second sealing cover is provided with an exhaust pipe and a discharge port, and a drying unit is installed in the drying cylinder. The fodder drying device has the beneficial effects that fodder in the drying cylinder is turned over and scattered through the main shaft, the supporting shaft, the movable part and the scraping plate, an external hot air device blows hot air into the drying cylinder through a connecting valve, an air guide cavity, an air outlet hole and a one-way valve to drive fan blades, a rotating shaft, a stirring rod and a supporting rod to rotate, and the turned fodder is knocked through the supporting shaft, the stirring rod and the supporting rod; and the feed is dispersed, the granularity of the feed is reduced, the contact area of the feed and hot air is increased, water in the feed can be conveniently and rapidly taken out, and the feed drying efficiency is improved.

The invention discloses a method for preparing rice bran powder by using a sectional type steam explosion technology, which comprises the following steps: (1) removing impurities from fresh rice bran, immediately spraying a color fixative on the rice bran, uniformly stirring, adding into a steam explosion machine, and carrying out two-section type steam explosion treatment to obtain wet rice bran powder; and (2) drying the wet rice bran powder obtained in the step (1) until the water content is below 10% to obtain the rice bran powder, the steam explosion treatment conditions in the step (1) are as follows: the first section is 0.6 MPalt; the steam pressure is smaller than or equal to 0.8 MPa, and the pressure maintaining time is 1-2 min; in the second stage, the steam pressure is larger than or equal to 0.3 MPa and smaller than or equal to 0.6 MPa, the heat preservation range is 135-160 DEG C, and the pressure maintaining time is 2-5 min. Compared with the prior art, the preparation method has the advantages that the stability of the rice bran can be effectively improved, the taste, sensory characteristics and digestibility of the rice bran are improved, the operation time is short, and the energy consumption is low.

The invention discloses a novel administration method for eye administration. The novel administration method specifically comprises the following steps: S1, filling a special solution bottle with a drug solution; s2, the solution bottle is aligned with the eyes to be used in the spraying process, medicine fog drops enter the eye liquid medicine bottle to be combined with an atomization device to be used, fine fog-shaped liquid drops are sprayed out through the atomization device, the particle size of the fog drops ranges from 0.1 micrometer to 60 micrometers, and the fog drops reach eyeballs and the peripheries of the eyes; s3, administration is performed in a medicine and mechanical combination mode during use, the medicine solution and the atomization device can be separately produced and prepared, and the medicine solution and the atomization device are combined during use. According to the novel administration method and atomization administration mode for eye administration, the medication treatment effect can be improved, the risk of eye infection caused by drugs is reduced, the discomfort of eyes during medication is improved, and the medication compliance of patients is improved.

The invention provides a kernel driving method and device based on multi-kernel collaboration and electronic equipment. The method comprises the following steps: receiving a calling task of a user mode by a service driver; the service driver sends the calling task to a task queue of an IP driver of a corresponding type according to the IP type corresponding to the calling task; selecting a calling task from the task queue as a target task by the IP driver; if the IP corresponding to the target task is of a multi-core structure, the IP driver sends the target task to a corresponding multi-core cooperation unit; selecting, by the multi-core cooperation unit, a target core from the plurality of cores of the IP according to a priority policy; the multi-core cooperation unit schedules the target task to the target core; and executing the target task by the target core. In this way, the task processing capacity of the system is greatly improved, and the overall efficiency is improved.

The invention discloses low-GI nutritional meal replacement powder and a preparation method thereof, and belongs to the technical field of preparation of low-GI meal replacement powder. The meal replacement powder is prepared from the following components in parts by weight: 10-20 parts of whey protein powder, 5-10 parts of konjaku flour, 3-5 parts of a roxburgh rose and cactus polysaccharide / sacha inchi protein compound, 3-5 parts of quinoa flour, 3-5 parts of highland barley flour, 3-5 parts of chickpea flour, 3-5 parts of corn flour, 3-5 parts of coarse rice flour, 1-3 parts of citrus fibers, 1-3 parts of pumpkin fibers, 1-3 parts of inulin and 1-3 parts of a hawthorn extract. 1 to 3 parts of blueberry extract, 0.5 to 2 parts of DL-malic acid and 0.5 to 2 parts of isomaltulose. The roxburgh rose cactus polysaccharide, the sodium alginate and the sodium carboxymethyl cellulose jointly act on the sacha inchi protein, hydrogen bonds and Van der Waals force are formed, protein degradation is slowed down, the slow release effect is enhanced, the bioavailability is improved, and the sacha inchi protein contains multiple amino acids and can assist muscle recovery; the whey protein powder and the konjaku flour are utilized, so that the raw materials are uniformly dispersed, the granularity is refined, and the brewing performance and the digestion and absorption efficiency are improved.

The invention belongs to the technical field of light emitting, and particularly relates to a side-in type backlight module which comprises a circuit substrate, lamp panels, a light emitting chip, a light uniformizing piece and a light uniformizing unit, the lamp panels are arranged on one side of the circuit substrate and are perpendicular to the circuit substrate, a plurality of grids are defined by the multiple lamp panels on the surface of the circuit substrate, and the light emitting chip is arranged on the light uniformizing piece. One surface of the circuit substrate close to the lamp panel is coated with a reflecting layer; the light-emitting chips are arranged on the surface of the lamp panel, at least one light-emitting chip is arranged in each grid, and the circuit substrate and the light-emitting chips are electrically connected through the lamp panel; the grids are wrapped and clamped by the dodging sheet and the circuit substrate, a plurality of dodging units are arranged on the side, close to the circuit substrate, of the dodging sheet, the dodging units and the grids are embedded into the grids in a one-to-one correspondence mode, and the dodging sheet is positioned. The backlight module has the effect that positioning between the dodging sheet and the backlight source is more stable and accurate.

The application belongs to the technical field of superfine powder preparation, and more particularly relates to a variable-speed ball milling method for preparing superfine geological samples. A geological sample is placed in a ball mill tank containing grinding balls, and a superfine geological sample is obtained through multiple ball milling, wherein the rotation speed of the ball mill in the multiple ball milling process is sequentially increased or sequentially decreased; for a geological sample with a dosage of less than 15 g, the ball milling method can obtain a superfine geological sample with a particle size D90 of 800-1000 mesh, thereby overcoming the technical problem that a superfine powder cannot be obtained through traditional fixed-speed dry ball milling. The method is particularly suitable for ball milling of laboratory analysis geological samples, and meets the requirements of modern geological sample analysis accuracy and accuracy level.

The present invention belongs to the technical field of soil improvement and restoration, and specifically relates to an environmental rock-based mineral material and a preparation method and application thereof. The present invention provides a preparation method for an environmental rock-based mineral material, comprising the following steps: the rock mineral is initially crushed and placed in a closed container, saturated water vapor is then introduced into the closed container for reaction, and secondary crushing is performed after the reaction is completed to obtain the environmental rock-based mineral material; wherein, during the reaction, the pressure of the closed container is 1-3MPa and the temperature is 200-350°C. The present invention prepares the material by heating the aqueous solution to a critical temperature, and the prepared powder has the advantages of complete grain development, small particle size, uniform distribution, good dispersibility, etc., and avoids the formation of hard agglomerates. Fine rock-based minerals have the characteristics of small particle size and large specific surface area, which are conducive to the adsorption and fixation of heavy metal Cd.

The invention belongs to the technical field of hydrodesulfurization, and particularly relates to a butyl phosphonic acid modified magnesium-based hydrodesulfurization material and a preparation method thereof. The magnesium-based hydrodesulfurization material is prepared from the following raw materials: magnesium, carbon black and butyl phosphonic acid, and the preparation method comprises the following steps: adding the magnesium into the carbon black for ball milling; carrying out hydrotreating on a solid product obtained by ball milling; adding the hydrotreated solid product into butyl phosphonic acid for ball milling; and carrying out heat treatment on a solid product obtained by ball milling in the previous step to prepare the butyl phosphonic acid modified magnesium-based hydrodesulfurization material. Magnesium hydride in the magnesium-based hydrodesulfurization material is used as a high-activity hydrogen source for hydrodesulfurization of dibenzothiophene in an anthracene oil liquid phase, and high temperature and high pressure are not needed in the hydrodesulfurization process; the surface of magnesium hydride is modified by butyl phosphonic acid, so that dibenzothiophene molecules stand and are adsorbed on the surface of magnesium hydride, a direct hydrogenolysis desulfurization reaction is carried out, and a benzene ring is not subjected to hydrogenation saturation, so that the selectivity of the hydrodesulfurization reaction can be improved.

The invention provides a continuous micro-fluidization crystallizer and a preparation method of fluticasone propionate micro-nano particles, and the preparation method comprises the following steps: (1) providing acetone, adding fluticasone propionate into acetone, and preparing an acetone solution of fluticasone propionate; (2) providing water; (3) simultaneously inputting the acetone solution of the fluticasone propionate and water into a continuous micro-fluidization crystallizer according to a ratio, separating out crystals of the fluticasone propionate in the process of mixing the acetone solution of the fluticasone propionate and the water in the continuous micro-fluidization crystallizer, and suspending the formed micro-nano particles in crystal mush; and (4) collecting crystal mush, separating and drying to obtain the fluticasone propionate micro-nano particles, wherein the particle size D90 of the fluticasone propionate micro-nano particles is 1-20 [mu] m. The preparation method of the fluticasone propionate micro-nano particles is suitable for industrial large-scale production, the product quality is stable, the operation is simple, and the requirement on equipment is low.

This invention provides an ultrafine intermediate molybdenum oxide material and its preparation method. The method involves placing ammonium molybdate in a reaction vessel and heating it in a vacuum environment at 400℃–600℃ for at least 3 hours to obtain the ultrafine intermediate molybdenum oxide material. The reaction vessel is a sealed structure except for the exhaust end, which is equipped with a one-way gas flow valve. The Fisher particle size of the ultrafine intermediate molybdenum oxide material is 0.8–1.0 micrometers. The method uses a reaction vessel equipped with a one-way gas flow valve, preventing external air from entering during the roasting process while simultaneously allowing the exhaust of gases generated during decomposition, thus ensuring the purity of the obtained molybdenum oxide material. The process conditions are simple and easy to control, making it suitable for industrial production. This material, with its small particle size and high purity, has broad application prospects.

The invention discloses an industrial preparation method of nano yttrium oxide for electronic ceramics, belonging to the field of rare earth hydrometallurgy technology. The invention first dissolves yttrium oxide in nitric acid to remove anionic impurities in yttrium oxide, then removes impurities through (NH4)2S solution to obtain a high-purity yttrium nitrate solution, then precipitates yttrium carbonate crystals through ammonia water and ammonium bicarbonate solution, and finally calcines and decomposes to obtain nano yttrium oxide for electronic ceramics. The yttrium oxide obtained by the invention is nano-sized, has a high specific surface area, and is easy to disperse. It is suitable for the electronic ceramic industry, especially for industrial production, and has broad application prospects.

The invention discloses a crusher and a using method thereof, and relates to the technical field of metal crushing equipment, the crusher comprises a crusher shell, a crushing chamber is formed in the crusher shell, and a crushing power assembly is mounted on the outer side surface of the crusher shell; auxiliary gear cutters are uniformly distributed and mounted on the outer side surface of the first rotating column and the outer side surface of the second rotating column; two material guide direction plates are mounted in the crusher shell; a first rotating column and a second rotating column are arranged to drive a plurality of auxiliary gear cutters to rotate oppositely, strong shearing and impact force are formed, scrap metal obtained after primary crushing is further crushed, the crushing efficiency is improved, the scrap metal can be evenly crushed during opposite rotation, the consistency of the granularity of finished products is ensured, secondary crushing is conducted, and the crushing efficiency is improved. Large particles obtained after primary crushing are further refined, the smaller finished product granularity is achieved, different recycling and reusing requirements are met, the purity and the recycling rate of metal are improved, and economic benefits are increased.

The utility model provides a solid waste treatment and disposal device, which relates to the technical field of solid waste treatment and processing and comprises a disposal box provided with a feed hopper and a discharge port. A pre-crushing assembly, a double-combustion assembly and a plurality of high-temperature-resistant electromagnetic plates are sequentially arranged in the treatment box from top to bottom, wherein the high-temperature-resistant electromagnetic plates are obliquely arranged on the inner walls of the two sides of the treatment box in a staggered mode and used for treating solid waste and effectively separating metal in the solid waste. After solid waste in the device is processed and treated, the obtained particle size is smaller so that subsequent storage can be facilitated, meanwhile, effective separation of metal and nonmetal in impurity ash powder after treatment can be achieved, the metal can be processed again and recycled, and the solid waste treatment and treatment effect is better.

The present application relates to the technical field of iron-based superconductor material, in particular to a uniform refinement method of iron-based superconducting powder, iron-based superconducting fine powder and application thereof. The present application refines the particle size of iron-based superconductor by wet ball milling, uses aromatic hydrocarbon solvent, alkane solvent, alcohol solvent, ether solvent, weak acid aqueous solution or weak base aqueous solution as wet medium, so that the material is fully dispersed, the grinding efficiency is improved, and free active impurities can be removed; by controlling the rotation speed (10-1200 r / min) and time (≥0.1 h) of wet ball milling, the iron-based superconducting fine powder with small particle size (≤12 μm), uniform and concentrated particle size distribution and high purity can be accurately obtained. Moreover, the refinement method of wet ball milling provided by the present application does not cause damage to the iron-based superconductor crystal, the wet medium is easy to remove and does not introduce impurities, and the superconducting critical transmission current of the iron-based superconductor tape made of the iron-based superconducting fine powder is greatly improved.