13 results about "Aerosol powder" patented technology

The invention relates to the field of powder injection molding materials, in particular to a metal injection molding aluminum-containing stainless steel material and a preparation technology, and the stainless steel material comprises the following components in percentage by mass: 6-8 wt% of Ni, 15-18 wt% of Cr, 0.5-2.5 wt% of Al and 1t of C; 0.2 wt%, and the O content is lt; the low-carbon and low-oxygen metal powder is obtained through vacuum gas atomization, the metal powder is formed through the injection molding process and then is degreased through organic oxalic acid, hydrogen is adopted in the whole process of the thermal degreasing stage, and the low-carbon and low-oxygen metal powder is obtained through the gas atomization powder preparation process, so that the low-carbon and low-oxygen metal powder is obtained. The aluminum-containing stainless steel material which is low in carbon, low in oxygen, high in compactness, high in strength, high in corrosion resistance and high in high-temperature creep resistance is obtained through the processes of heat treatment, rapid heating and heat preservation, and the C content of the stainless steel material prepared through the preparation process is 1t after heat treatment; 0.2 wt%, oxygen content lt; the 0.2 wt% structure is compact, the sintering density is high, and the normal-temperature and high-temperature mechanical strength is higher than that of conventional materials such as 304L, 316L and 17-4PH.

The invention provides a titanium-tantalum alloy component and a preparation method and application thereof. The preparation method of the titanium-tantalum alloy component comprises the steps that S1, titanium and tantalum are prepared into a titanium-tantalum alloy bar through smelting; s2, the titanium-tantalum alloy bar is subjected to gas atomization powder manufacturing or rotating electrode powder manufacturing under inert gas protection, and titanium-tantalum pre-alloyed powder is obtained; and S3, 3D printing is conducted on the titanium-tantalum pre-alloy powder, and the titanium-tantalum alloy component is obtained. According to the method, firstly, titanium and tantalum are smelted and evenly mixed, then gas atomization powder manufacturing or rotating electrode powder manufacturing is conducted, titanium powder and tantalum powder of the powder are evenly distributed, finally, 3D printing is conducted on the powder, and due to the fact that the size of a 3D printing molten pool is small, macrosegregation generated in a conventional preparation method can be effectively avoided; and finally, a titanium-tantalum alloy component which is fine and uniform in structure and good in alloy performance is obtained.

The utility model relates to the technical field of atomization powder making, in particular to a plug pulling pouring type gas atomization powder making device which comprises a melting part, and a through hole is formed in the bottom end of the melting part. The liquid guide part comprises a first end and a second end which have the same axis but different outer diameters; the upper end of the plug rod is connected with a driving mechanism, and the lower end of the plug rod is provided with a matching part; the atomizing nozzle is connected with a gas pipeline, the second end is sleeved with the atomizing nozzle, and the upper end face of the atomizing nozzle abuts against the lower end face of the first end; the feedback adjusting assembly comprises a control unit, a position sensing part arranged on the plug rod, and a gas flow sensing part and a gas flow adjusting part which are sequentially arranged along the gas pipeline, and through the arrangement, it is ensured that finished metal powder is uniform in particle size form distribution and high in sphericity degree; and the atomization efficiency and the system stability during atomization work are effectively improved.

The present application provides a kind of powder agglomeration aerosol powder feeding device, including aerosol generating chamber and mixing mechanism, and the mixing mechanism includes rack, driving mechanism, mixing tank, first transmission assembly and material adding mechanism.By driving mechanism driving mounting frame reciprocating swing, and by second transmission assembly driving intermittent opening of material discharge slot of file lever, it makes gas phase alumina powder intermittent into yttria powder raw material, effectively avoid the self-agglomeration of gas phase alumina powder produced by one-time addition, facilitate the realization of uniform single particle coating of gas phase alumina powder on the surface of yttria powder, mix evenly, improve the electrostatic inhibition effect, at the same time, mixing tank reciprocating swing and rotation are carried out shaftless tumbling stirring, which can reduce the generation of static electricity, avoid the shaft sticking, agglomeration of gas phase alumina powder, improve the utilization rate of gas phase alumina powder, and there is no strong shear, which will not cause the gas phase alumina powder to be dispersed again after uniform coating on the surface of yttria powder raw material, ensure the performance stability of mixed powder.

The invention relates to a gas atomization powder preparation technology, and provides a method for optimizing modification of the tail end of a flow guide pipe and preventing a nozzle from being blocked. According to the method, the continuity and stability of the atomization process are ensured by optimizing a geometric structure, material selection and technological parameters. The tail end of the flow guide pipe is of a conical shrinkage structure, the divergence angle ranges from 40 degrees to 45 degrees, the height of a shrinkage section ranges from 2.0 mm to 6.0 mm, the inner diameter ranges from 3.0 mm to 6.0 mm, the width of a small platform is smaller than or equal to 1.0 mm, and metal melt retention is reduced. And the service life is prolonged by adopting a ZrO2 or SiC high-heat-resistant ceramic material. The atomization gas pressure is 3.5-4.5 MPa, the melt temperature is 1500-1650 DEG C, the vacuum degree is less than or equal to 5 * 10 <-3 > Pa, and efficient atomization is ensured. A spraying disc flow channel is of a Laval structure or a gradually-shrinking structure, the coupling distance between an air outlet and the tail end of the flow guide pipe is 5-7 mm, and the gas-liquid interaction is optimized. After optimization, the sphericity degree of powder is improved, satellite powder is reduced, and the service life of the nozzle is prolonged by 30%. The gas consumption is reduced by 20%, and the maintenance cost is reduced by 15-20%. The nozzle is effectively prevented from being blocked, the atomization efficiency and the powder quality are improved, and important industrial application value is achieved.

The application discloses a device and method for measuring aerosol release share and rate at a fuel rod break of a lead-bismuth reactor, which comprises a high-pressure gas tank, an aerosol mixing device, a simulated fuel rod, a break sealing device, a collecting device, a particle size spectrometer and pipeline valves and flow pressure measuring instruments. The high-pressure gas tank is used for providing required gas, the aerosol mixing device is used for mixing gas and used aerosol powder, the simulated fuel rod is used for containing high-pressure aerosol and is designed in different shapes and sizes of cladding breaks according to the size and structure of a real lead-bismuth reactor fuel rod, the break sealing device is used for sealing the break to form a closed environment inside the fuel rod, the collecting device is used as a containing place of the aerosol to facilitate subsequent sampling measurement, and the particle size spectrometer is used for measuring the aerosol particle concentration of sample gas. The application can complete the measurement of the aerosol release share in the gap between the fuel rod pellet and the cladding and the release rate of the gas through the break, and is used for studying the release characteristics of the aerosol and the fissile gas under different fissile gas pressures and different break sizes and appearances.

The invention discloses a device and a method for measuring aerosol release share and particle size distribution under damage of lead-bismuth fuel. The device comprises a high-pressure gas tank, an aerosol weighing device, a simulation fuel rod, a crevasse sealing device, a collecting device, a wet particle size analyzer, a pipeline valve and a measuring instrument, the high-pressure gas tank is used for providing gas required by the whole device, the aerosol weighing device is used for weighing aerosol powder used in the fuel rod in an initial state, and the simulated fuel rod is designed according to the size and the structure of the real lead-bismuth reactor fuel rod and is used for accommodating high-pressure gas and aerosol and constructing cladding crevices with different shapes and sizes; the crevasse sealing device is used for sealing a crevasse to construct a closed environment in the fuel rod, the collecting device serves as a containing place for aerosol released by the fuel rod to facilitate subsequent sampling measurement, and the wet particle size analyzer is used for measuring particle size distribution of aerosol particles. The device disclosed by the invention can be used for measuring the release share and the particle size distribution of the aerosol in the fuel rod pellet-cladding gap through the cladding crevasse, and can be used for researching the release characteristics of the aerosol under different fission gas pressures and different crevasse sizes and morphologies.

The invention relates to gas atomization powder manufacturing equipment for alloy powder production, which relates to the technical field of alloy powder processing equipment and comprises a frame body, an atomization cylinder, a feeding box, a dynamic feeding assembly, a powder collecting tank, a straightening mechanism and an impact type descaling mechanism. The atomization barrel is composed of a straight barrel section and a conical powder collecting section, an atomization mechanism and a high-frequency smelting coil are arranged in the atomization barrel, and a water-cooling spiral pipeline is arranged on the barrel wall and matched with a conical radiant panel to accelerate cooling of metal liquid drops. A gradient composite inner wall coating, a spiral flow guide structure and an impact type descaling mechanism are adopted, the powder adhesive force is damaged through high-frequency knocking, and adhesion is prevented. And the powder collecting tank is connected with the atomizing cylinder through a quick disassembly structure, so that quick disassembly and assembly are realized, and the collecting efficiency is improved. The straightening mechanism is provided with a sliding rod adjusting mechanism, a movable frame can be electrically driven, stepless adjustment of the distance between straightening wheels is achieved, and the straightening mechanism is suitable for raw materials of various specifications. According to the equipment, the production efficiency and the product quality are effectively improved, and an efficient, stable and reliable solution is provided for alloy powder production.

The invention discloses an expanded polytetrafluoroethylene-based film type fog absorbent diaphragm and a preparation method thereof, a support skeleton layer of the diaphragm is an expanded polytetrafluoroethylene film with a microporous structure, fog absorbent slurry forms a fog absorption functional layer on the surface of the expanded polytetrafluoroethylene film, and the fog absorbent slurry is embedded into the microporous structure to form active filling; during preparation, the solvent, the coupling agent and the fog absorbing agent powder are added into the organic binder resin, and the organic binder resin is coated into an expanded polytetrafluoroethylene film by adopting a high-precision surface controllable coating composite technology to prepare the diaphragm. Through the mode, the expanded polytetrafluoroethylene-based film type fog absorbent membrane prepared by adopting a high-precision surface controllable coating composite technology has high moisture absorption rate and lasting reversible characteristics, the desorption reversible starting condition is not harsh, the desorption rate is high, and the adsorption and desorption cycle durability is excellent; the material has the advantages of excellent flexibility, excellent mechanical properties, excellent weather resistance and excellent temperature resistance, and is suitable for the narrow space field.

This invention discloses a heavy-duty durable airport pavement RPC and its preparation method, comprising the following components in parts by weight: 15-30 parts silica fume, 20-50 parts mineral powder, 0-25 parts fly ash, 0-25 parts microspheres, 8-15 parts graphene, 1.5-8 parts composite microsurfactant, 8-25 parts aerosol powder, and 10-15 parts retarding high-efficiency water-reducing agent. The composite microsurfactant includes 1-3 parts sodium glutamate and 0.5-5 parts sodium carboxymethyl cellulose. The heavy-duty durable airport pavement RPC provided by this invention, with solid waste materials as the main body, combined with composite microsurfactants and retarding high-efficiency water-reducing agents, can significantly improve the flexural strength and freeze-thaw resistance of airport pavement concrete when used in concrete, improve the performance of airport pavement concrete, ensure the service life of airport pavement, reduce the amount of maintenance work, and lower construction and maintenance costs.

The invention discloses a device and a method for spraying aerosol in a supersonic flight state. The device comprises a gas supply system, a secondary flow gas conveying pipeline, an aerosol particle feeding system, an aerosol powder feeding amount control system, an aerosol conveying pipeline, an aerosol conveying pipeline shielding cover, an aerosol nozzle, an aerosol nozzle angle adjusting device, an outer adjusting piece structure device and the like. The spatial distribution of aerosol particles can be freely regulated and controlled according to the actual flight Mach number, the aerosol spraying amount is regulated and controlled through an aerosol conveying valve, the aerosol spraying angle is regulated and controlled through an aerosol nozzle angle adjusting device, the inclination angle of an outer adjusting piece can be adjusted, and an ideal aerosol spatial distribution form is obtained; and the aerosol particle powder feeding amount is increased along with the increase of the flight Mach number through an aerosol powder feeding amount control system, so that the concentration of an aerosol shielding layer is improved, and the infrared inhibition ratio of supersonic flight at each detection angle is greatly improved.

The invention relates to a method for constructing a lung injury animal model after radioactive dust inhalation, which comprises the following steps of: injecting pentobarbital sodium into the abdominal cavity to anesthetize a rat, and observing the change of the rat; after anesthesia, vertically lifting the rat, fixing the rat with the head facing upwards, opening the airway of the rat by using a laryngoscope, then inserting a rat lung dry powder quantitative atomizer filled with UO2 aerosol powder into the airway of the rat, and quickly pressing a piston of an injector to the bottom; after inhalation contamination is completed, shaking the rat left and right to enable the UO2 aerosol powder to be evenly distributed in the lung of the rat, paying attention to observing the breathing and physiological states of the rat, pressing the heart of the rat in time to conduct cardio-pulmonary resuscitation if the rat is in an uncomfortable state, putting the rat into a cage to conduct normal feeding after the rat is recovered, and finally conducting animal model evaluation. According to the method, the atomizer filled with the UO2 powder is inserted into the trachea of the rat through the laryngoscope, the acute lung injury model is obtained through induction, the contamination dosage is accurate in the quantitative dry powder aerosol contamination mode, and scene exposure of occupational personnel is better simulated.

The present invention relates to an aerosol concentration measurement method, device and equipment. An aerosol concentration measurement method comprises the following steps: controlling an initial light intensity signal I0 to the aerosol powder; passing through the aerosol powder to be measured, the initial light intensity signal I0 is attenuated to obtain an attenuated detection light intensity signal I m ; According to the attenuation detection light intensity signal I m Calculate the transmittance #imgabs0# generated by the initial light intensity signal I0 on the aerosol powder to be tested, wherein the transmittance #imgabs1# is a preset detection light intensity signal I b and the attenuated detection light intensity signal I m According to the transmittance #imgabs2#, the aerosol powder concentration M is obtained through the relationship function v The present invention can accurately measure the aerosol concentration, and reduce the impact of aerosol powder adhesion and changes in test environment factors, thereby reducing the problems of large fluctuations in measurement values ​​and large errors.