17 results about "Micronization" patented technology

This invention discloses a method for the simultaneous preparation of micronized and stabilized zero-valent iron (ZVFe) based on ball milling with terephthalic acid, belonging to the field of groundwater pollution remediation materials. The method includes the following steps: 1) incorporating terephthalic acid into micron-sized ZVFe powder and mechanically ball milling it; 2) cleaning the material with a solvent and drying it to obtain micronized and stabilized ZVFe reducing material. This invention simultaneously achieves the micronization and stabilization of ZVFe. This method enhances the reducing activity, internal surface hydrophobicity, and electron selectivity of ZVFe materials, improves their reducing performance and electron selectivity for pollutants such as halogenated hydrocarbons and heavy metals, effectively inhibits the oxidative deactivation of ZVFe materials in the aquatic environment and the hydrogen evolution side reaction with water, enabling ZVFe materials to maintain high reducing activity stably in water for a long period. This invention solves the technical problems of poor stability and difficult storage of micronized ZVFe materials in water, which is beneficial for reducing material replacement frequency and resource consumption.

The present application belongs to the field of wastewater advanced oxidation treatment technology, and proposes a wastewater treatment device with ozone oxidation and hydraulic cavitation synergistic effect. A primary Venturi tube, a ring air guide structure, a ring gap and a gas-liquid initial mixing section are arranged. The hydraulic cavitation is realized through the primary Venturi tube, the cavitation bubbles formed are extended to the downstream along the expansion section, and the synergistic effect with the ozone entering through the ring gap is realized. In the extreme environment generated by the collapse of the cavitation bubbles, the dissolution of the ozone gas into the liquid and the generation of the hydroxyl radicals are promoted. To some extent, the dependence on the pressure gas source is reduced, and the energy consumption is reduced. The gas phase is preliminarily dispersed before entering the secondary Venturi tube, the uniformity of the gas-liquid in the flow space is realized to the maximum extent, and the choked flow is easy to form. On the one hand, the bubbles can be further micronized, and the mass transfer is strengthened. At the same time, the gas-liquid interface changes sharply in the process of bubble micronization, which is also beneficial to the efficient generation of the hydroxyl radicals, so as to further improve the wastewater treatment efficiency.

The application discloses a kind of MXene-polymer composite material and preparation method thereof, preparation method includes the following steps: by mechanical shearing grinding including multilayer MXene particle, polymer material and magnetic nano grinding aid in raw materials, realize the in-situ exfoliation of multilayer MXene, size micronization and composite of raw material, and MXene-polymer composite material is prepared and obtained.The application realizes the in-situ exfoliation of multilayer MXene particle by shearing grinding and the auxiliary action of magnetic nano grinding aid, in the MXene-polymer composite material prepared and obtained, MXene nanosheet can form uniform stable dispersion in polymer matrix, processing and preparation MXene-polymer composite material has good conductivity and electromagnetic shielding efficiency, the method is simple and easy to operate, suitable for large-scale production.

The invention relates to the technical field of carbon material preparation, and discloses a preparation method of a high-purity high-temperature-resistant graphite material for a photovoltaic thermal field, the high-purity high-temperature-resistant graphite material is prepared from pitch coke, artificial graphite fine powder and a high-wettability modified binder, and the binder comprises coal pitch, heavy anthracene oil and a surfactant. The preparation method comprises the following steps: micronizing aggregate, mixing and kneading the micronized aggregate and a modified binder at a high temperature, and carrying out secondary grinding to obtain pressed powder with preset grain size distribution; cold isostatic pressing forming is adopted, and the pressure relief time is strictly controlled; the green body is subjected to low-speed heating roasting, dipping densification and high-temperature graphitization treatment, and halogen gas is introduced into a graphitization high-temperature section for chemical purification. According to the invention, a composite aggregate system and a secondary granulation process are matched with a stress release regulation means for a large-size product, so that the technical problems that the large-size graphite product is easy to crack and low in density are solved, and the volume density, mechanical strength, purity and thermal shock resistance of the material are improved.

The present invention relates to an improved wood coating composition wherein said composition (C) comprises, relative to the total weight of composition (C), from 58.00 to 95.00 weight percentage of at least one alkyd resin or at least one drying oil, from 0.10 to 8.00 wt. % of at least one microcrystalline wax having a congealing point from 60° C. to 100° C., and from 5.00 to 34.00 wt. % of at least one synthetic micronized wax, said at least one synthetic micronized wax having a particle size D90 equal to or less than 36.0 μm and a particle size D50 equal to or less than 20.0 μm, wherein the congealing point of the microcrystalline wax (Wc) is measured according to the standard ASTM D938, and wherein the particle size of the at least one micronized wax (Mp) is measured according to the standard DIN ISO 13320.

The invention discloses stable diuron granules and a preparation method thereof, and belongs to the technical field of pesticide preparations. The invention aims to solve the problems of poor water solubility, insufficient photo-thermal stability, out-of-control release and serious dust dissipation of the existing diuron preparation. The core of the preparation method is as follows: micronized diuron, sodium bentonite, pregelatinized starch and nano silicon dioxide are mixed by a dry method to obtain dry-mixed powder; dissolving the modified lignosulfonate and polyethylene glycol in water to prepare a bonding solution; a finished product is obtained by adopting staged fluidized bed granulation (nucleation-growth-surface strengthening) and combining stepped heating drying and screening. The synergistic advantages of low dust, slow release and high photo-thermal stability are realized. The modified lignosulfonate and the staged granulation process are the key core, the comprehensive performance of the embodiment is obviously superior to that of the contrast, the advancement of the formula and the process is proved, and the method has important practical application value.

A system for micronization of solid particles using valvular conduit includes one or more compressed gas lines provided with respective compressed gas inlet, one or more powder feeders, each of which are installed in a respective compressed gas lines. Furthermore, one or more valvular conduit modules are included, each of which are made of a series of valves connected via a common passage, and each valvular conduit module is connected downstream of the respective one or more powder feeders. Further, a cyclonic separator is connected with all the respective compressed gas lines connected with respective outlets of the respective one or more valvular conduit modules, and one or more particle size analysers in combination with one or more directional valves disposed on the compressed gas lines proximal to the outlets of the one or more valvular conduit modules.

The utility model relates to the technical field of superfine slag powder, and discloses a superfine slag powder screening device which comprises a base, a shell is fixedly connected to the base, the shell is obliquely arranged, the bottom of the shell is conical, and a feeding port is fixedly connected to the top of the shell. The powder screening assembly is arranged in the base, the powder screening assembly is used for crushing and screening slag, the powder screening assembly comprises a screening barrel, a transmission rod and a crushing block, the screening barrel is rotationally arranged in the base, the transmission rod is arranged in the middle of the screening barrel, and through cooperation of internal parts of the powder screening assembly, the movable block drives the crushing block to move in the same movement track; the crushing block carries out crushing operation on slag during movement, the slag is driven by the crushing block and ascends and descends up and down, so that the slag is fully crushed, the crushed slag is outwards screened out by the opposite centrifugal force of the crushing block and the screening cylinder, the occupied space in the device is reduced, and the energy consumption is reduced.

The present disclosure relates to an artificial agglomerated stone comprising micronized feldspar and to a method for its manufacturing.

The present invention relates to a process for micronizing a UV filter dispersion comprising at least one micronized insoluble organic UV absorber, the process comprising: a) providing a first aqueous dispersion comprising said at least one insoluble organic UV absorber; b) grinding the first aqueous dispersion in a first grinding step in a ball mill, preferably a stirred media mill comprising grinding beads having a diameter in the range of 0.6 to 2.0 mm, to obtain a second dispersion; c) grinding the second dispersion obtained in b) in a second grinding step in a ball mill, preferably a stirred media mill comprising grinding beads having a diameter in the range of 0.05 to 0.6 mm, in order to obtain an aqueous dispersion comprising the at least one micronized insoluble organic UV absorber, wherein the diameter of the grinding beads in the step b) is larger than that of the grinding beads in the step c). Furthermore, the present invention relates to an aqueous dispersion comprising at least one micronized organic insoluble UV absorber obtainable by such a process, and to a composition, such as a sunscreen composition, comprising such an aqueous dispersion.

The invention belongs to the technical field of wheat processing, and particularly relates to a processing production method of selenium-enriched wheat flour. Comprising the following steps: S1, performing cleaning, impurity removal, conditioning, grinding and screening on a wheat raw material to obtain basic wheat flour, and synchronously collecting a protein-rich intermediate material generated in a wheat starch production process; s2, preparing the protein-rich intermediate material into a protein-rich solution with the protein dry basis mass concentration of 10-20%; s3, taking the protein-rich solution as a matrix, carrying out binding reaction on the protein-rich solution and an organic selenium source, and carrying out cross-linking curing, drying and micronization treatment to prepare selenium-rich powder; and S4, mixing the selenium-rich powder with basic wheat flour to obtain the selenium-rich wheat flour. According to the invention, the organic selenium source is crosslinked and solidified in the wheat protein, and the wheat protein is used for embedding and protecting the organic selenium source, so that the water solubility resistance of the organic selenium source is improved, and the retention rate of the organic selenium source in the boiling process is up to 94% or above.

The present application relates to a kind of micro-nano bubble generation processes, belong to bubble generation field, including the following steps: S1, make water flow have preset speed into beam cavity, and in beam cavity, flow in jet form, the beam that flows out from beam cavity and after mixing from air inlet cavity into gas, into flow guide cavity;S2, gas-liquid mixture from flow guide cavity into collision cavity, and in collision cavity, bubble micronization;S3, after impact and the gas-liquid mixture of forming turbulent flow, into rotating cavity, by rotating piece in rotating cavity, impact again, finally with high-speed rotating state shoots out rotating cavity, and high-speed rotating water flow and negative pressure cavity can continuously cut gas bubble, to further produce micro-nano bubble.The present application has the advantages that: water flow and gas are rotated and sheared in turn through beam cavity, flow guide cavity, collision cavity and rotating cavity, and the phenomenon of rotating and shearing breakage or mutual impact occurs, to realize the breakage of gas bubble several times.

The invention discloses a spraying process for a resistance-free high-frequency power supply shell in a wire cutting machine. The spraying process comprises the specific steps that (1) surface pretreatment is conducted, specifically, a part to be sprayed is subjected to cleaning, oil removal and sand blasting roughening treatment; (2) preparing a coating: stirring and mixing epoxy resin, a composite curing agent, a conductive pigment, a conductive filler, an auxiliary agent and a solvent at a high speed, performing melt extrusion through a double-screw extruder, cooling, crushing, and performing micronization treatment to obtain a powder coating; 3) spraying process: spraying by adopting an electrostatic powder spraying method; and (4) curing forming is conducted, specifically, the sprayed to-be-sprayed component is fed into a curing oven after standing in the leveling area, and then the to-be-sprayed component is naturally cooled to the room temperature to form a final coating. In this way, according to the spraying technology for the resistance-free high-frequency power source shell in the wire cutting machine, the self-made functional coating is adopted in the technology, and by adjusting original spraying parameters, the multiple requirements for heat dissipation, electromagnetic shielding, corrosion resistance and mechanical protection can be met at the same time.

The invention relates to the technical field of road engineering materials, and discloses a road small box girder crack repairing material and road maintenance application. The repairing material is composed of solid-phase powder and liquid-phase slurry; the solid-phase powder comprises dead burned magnesium oxide, quartz sand, micronized carbonate, benzoyl peroxide and an active mineral admixture; the liquid-phase slurry comprises hydroxyethyl methylacrylate, methacrylic acid, water, ammonium dihydrogen phosphate and a silane coupling agent. Chemical heat released by inorganic acid-alkali reaction is utilized to excite organic monomer polymerization, so that rapid curing in a low-temperature environment is realized; and a self-pressurization mechanism is constructed by utilizing in-situ gas production, and slurry is driven to permeate into the deep part of the microcrack and isolate oxygen. The material has the advantages of being high in low-temperature constructability, high in micro-crack permeability, firm in interface bonding, good in impermeability and durability and the like, and is particularly suitable for rapid first-aid repair of concrete bridges and pavement micro-cracks in cold weather.

The micronization preparation device comprises a tank body, supporting legs are fixedly connected to the bottom of the outer surface of the tank body, a circular ring water outlet box is fixedly connected to the top of the inner surface of the tank body, and a circular ring hot air box is fixedly connected to the inner surface of the circular ring water outlet box. A circular ring spraying box is fixedly connected to the inner surface of the circular ring hot air box, a mounting plate is fixedly connected to the inner surface of the circular ring spraying box, and the bottom of the tank body communicates with a discharging pipe. Firstly, the water pump and the motor are started, the inner wall of the tank body is washed through the water pump and the annular water outlet box, the output end of the motor drives the scraping plate and the metal soft brush plate to rotate, the inner wall of the tank body is brushed, redundant sewage is discharged through the discharging pipe, and hot air is blown into the tank body through the air conveying pipe and the annular hot air box; and the interior of the tank body is dried, micronization preparation can be continued at the moment, and therefore the effect of being convenient to clean is achieved.