170 results about "Particle mixing" patented technology

The invention provides nanoscale/micron size particle mixing type lead-free solder paste with a size effect and a manufacturing method thereof. The method comprises the following steps that nanoscale solder is slowly added into solder flux or a solder agent, after mechanical mixing, ultrasonic oscillation is lead in, mixing is continued, then the ultrasonic oscillation is stopped, micron size solder/flux is slowly added, and the mixed type solder paste which is uniformly mixed is obtained through continuously mixing. The manufacturing method has the advantages that process of the method is simple and feasible, the large size micron size solder is added in the nanoscale solder paste, the proportion of metal components in the solder paste is improved, and the low-melting-point property of nanometer brazing filler metal is maintained; mellow and full solder dots are formed at the low reflow soldering temperature; the obtained solder dots are polycrystal solder dots, and the grain sizes in the solder dots can be changed by adjusting the size distribution of micron size nanoscale solder, so that advance failure of the solder dots is avoided.

The present invention provides a gas-solids fluidization coupling equipment. It at least includes an one-stage gas-solids fluidized bed body, said fluidized bed body is a vertically-placed cylinder body. Said invention also provides the concrete structure of said gas-solids fluidized bed body. Besides, said invention also provides a coupling method capable of utilizing said equipment to implement multistage mixing, heat exchange, reaction and classification of granules with large difference.

The invention discloses a preparation method for ink-jet graphene and carbon nano tube conductive ink. The preparation method comprises the following steps: preparation of a graphite and carbon nano tube mixed dispersion liquid and mixing of ink, wherein the preparation of the graphite and carbon nano tube mixed dispersion liquid comprises the processes of ball-milling, initial separating, washing, separating and collecting. According to the preparation method, particle mixing, dispersing and particle dimension separating in the preparation of graphene and ink are organically combined, so that the preparation processes of the conductive ink are effectively reduced; and the process for preparing the graphene by selecting effective auxiliaries by use of a ball-milling method can be used for large-scale preparation, is simpler in comparison with the oxidization-reduction which is in common use at present as well as a CVD (chemical vapor deposition) method, efficient, and low in cost. After the ball-milling and separating processes, the particle dimension is controlled, so that fine filtration is not needed, and thus, the preparation process for the ink-jet conductive ink is continuously simplified.

The invention relates to a dry particle mixing device which comprises a mixing bin and a stirrer disposed in the mixing bin, wherein the stirrer comprises a stirring shaft and at least three stirringblades; fan-shaped ribs are disposed at joints between the stirring blades and the stirring shaft; an area of each of the stirring blades closed to the outer edge is a light plate area; a plurality ofmaterial mixing holes are formed in the stirring blades outside the light plate area in the lateral direction and the longitudinal direction; a plurality of material mixing bulges are simultaneouslydistributed on the stirring blades outside the light plate area; and the material mixing holes and the material mixing bulges are regularly distributed on the stirring blades. According to the deviceprovided by the invention, the light plate areas on the stirring blades are utilized to drive all particles to move, so that the particles flow on the stirring blades, and diverging flows and converging flows are generated continuously after the particles contact with the material mixing holes and the material mixing bulges; and the material mixing bulges can also change the original motion directions of the particles, so that the movement directions of the particles are more irregular, the particulate matter is loose, and finally the desired mixing uniformity is achieved.

The invention belongs to the field of material preparation, and discloses a device and method for preparing foam aluminum by a bottom blowing powder spraying method. Foaming gas and fluidized additiveparticles are transported to a slit type air-permeable brick by a powder spraying system through an air blowing pipe, the foaming gas and the fluidized additive particles are blown from the bottom ofa foaming chamber into aluminum liquid by the slit type air-permeable brick, two process of additive particle mixing and air-blown foaming in a conventional foam aluminum preparation technology are simplified to the process that gas and particles are together blown into the aluminum liquid, bubbles float upward to form foams, and continuous production of foam aluminum is achieved through collection, cooling, annealing and rolling of a rolling system; and the device for preparing foam aluminum by the bottom blowing powder spraying method comprises the powder spraying system, the air blowing pipe, the slit type air-permeable brick, a crucible, an agitator, and the rolling system. According to the method for preparing foam aluminum by the bottom blowing powder spraying method, the gas and the particles are blown together into the aluminum liquid, the particles are uniformly dispersed and not prone to being agglomerated, the dispersibility of the particles is improved, the performance offoam aluminum materials is improved, and the production power consumption is reduced at the same time.

The invention discloses a high-temperature high-pressure solid-containing multi-phase particle erosive wear testing device which comprises an air heating device, a gas-solid mixing device, a wear simulating device and a tail gas dust removal device. An air compressor is connected with an air dryer, a high-temperature air heater, a gas flow meter and a pressure intensity tester. The gas flow meteris connected with a particle mixing and auxiliary heating chamber. A mixing and heating chamber is connected with a solid particle heating chamber and a particle size screening machine. Solid particles are controlled by an impeller feeder to fall. An outlet of the mixing and heating chamber extends into a tank body through a solid flow meter and an acceleration pipeline. The tank body is controlled by a surrounding water cooling system to be cooled and is internally provided with a porous nozzle and a sample supporting frame. A sample heater is arranged on the sample supporting frame. A water-cooled sedimentation type dust collector is connected with the bottom of the tank body. A doppler laser velocimeter is aligned with a to-be-tested material in the tank body. By means of the testing device, the movement conditions and erosive wear conditions of solid-containing multi-phase particles hit on the material under different temperatures and pressure intensities can be researched.

A multi-stage solid particle heat absorber for solar thermal power generation is characterized in that heliostat fields (25, 26, 27) are used for correspondingly supplying radiation energy to a third-stage heat absorbing section (16), a second-stage heat absorbing section (10) and a first-stage heat absorbing section (4) which are annularly arranged at the upper part of a heat absorbing tower (22); low-temperature solid particles (3) in a low-temperature solid particle storing tank (23) are conveyed to a particle distributor (1) through a spiral lifting machine (24); the low-temperature solidparticles (3) flow into the first-stage heat absorbing section (4) for heating under the flow guide effect of a tapered insert (2) at the bottom part of the particle distributor (1); the heated low-temperature solid particles (3) enter a first-stage particle mixing chamber (9) and then enter the heat absorbing section at the next stage after temperature equalization; the low-temperature solid particles (3) flow into a high-temperature solid particle storing tank (20) through a tapered funnel (17) under the effect of a final-stage flow rate adjusting mechanism (18); after transferring heat to apower generation working medium, high-temperature solid particles (19) are transformed into the low-temperature solid particles (3) and then flow into the low-temperature solid particle storing tank(23).

The invention discloses a dust deposition removing method and a system. The method comprises the following steps: gas and solid particles are mixed into dust blowing medium flow; and the dust blowing medium flow is sprayed onto a dust deposition layer. The system comprises a gas transmission device, a particle supply device, a gas and particle mixing device, a particle separation and recycle device and a dust blowing gun. In the method, the dust deposition layer on a heating surface is broken and peeled off through the continuous strike of the solid particles and dust deposition can be removed thoroughly by combining the blowing and sweeping action of air current, in particular to the highly cohesive dust deposition on the surface of the heating surface of a boiler. The dust deposition on the surfaces of a horizontal heating surface and a vertical heating surface can be effectively removed through the system provided by the invention.

The invention discloses a tear test method based on surface-enhanced raman spectroscopy. The tear test method comprises the steps of mixing nano particles and tears, and detecting a tear and particle mixture through a raman spectrometer, thus obtaining a tear component raman spectrogram, wherein the tear and particle mixture can be liquid, semi-liquid or a dried crystal. The invention aims at providing a novel, quick, noninvasive and sensitive method for detection and analysis of the tears.

The invention discloses a haze particle formation simulator which comprises a combustion furnace, a control console, a growth simulation chamber, a light shield, a sucking pump, a flow meter, a three-way valve with a stop valve, a haze particle collector and an air purifier, wherein the growth simulation chamber is fixed on the control console; the combustion furnace, the growth simulation chamberand the air purifier are connected into a system by the sucking pump; the three-way valve with the stop valve realizes independent operation of a smoke dust source supply channel and a haze particlecollection channel; multiple feeding holes and an exhaust valve are formed in the growth simulation chamber, and the growth simulation chamber is equipped with temperature, humidity, airspeed and light intensity detection sensors as well as a light source, a fan and a supercharging balloon; and a temperature control device, a humidifier and a pressure gage are arranged in the control console. By detecting and regulating the temperature, pressure, humidity, airspeed and light intensity in the growth simulation chamber, the outdoor environment formed by haze is simulated, a research is conductedon formation of single haze particles or a multi-haze particle mixing system, and the haze particle formation simulator has obvious value on treatment of the atmospheric environment.

The invention discloses a PVC powder particle mixing double-screw material feeding machine. The PVC powder particle mixing double-screw material feeding machine comprises a mixing barrel, supporting posts, a supporting base plate, a control switch, a motor base, a material outlet pipe structure capable of limiting filtering, a double-screw supporting driving plate structure, a stirring diversion rod structure capable of being dredging, a driving motor, a driving belt wheel, a driving V-belt, a buffering hopper, a material stuffing hopper, an anti-leakage receiving disc and a sealing ring pad;and the supporting posts are separately connected to the four corners of the lower surface of the mixing barrel through bolts. According to the PVC powder particle mixing double-screw material feedingmachine, through the arrangement of the dredging stirring rod, a lifting handle and stirring blades, the effects of stirring and dredging are favorably realized; clogging of PVC powder is avoided, and material feeding efficiency is prevented from being affected; the buffering hopper and the material stuffing hopper are arranged, so that PVC raw materials requiring mixed material feeding can be favorably stored temporarily, and using convenience is increased; and a filtering limiting mesh plate is arranged, so that the effects of baffling and limiting are favorably realized, and the raw materials can be fully stirred by a first material conveying auger rod and a second material conveying auger rod and then conveyed to a material outlet hopper.

The invention discloses a high-performance stirrer used for molten iron mechanical-stirring desulfuration. The stirrer comprises a stirring shaft and stirring blades. The stirring blades are divided into the upper layer stirring blades and the lower layer stirring blades. The upper layer stirring blades and the lower layer stirring blades are all evenly distributed in the circumferential direction of the stirring shaft. The number of the upper layer stirring blades is the same as that of the lower layer stirring blades. The upper layer stirring blades and the lower layer stirring blades are distributed in a staggered manner. By means of the high-performance stirrer, the aims of enlarging the desulfurizing agent stirring and mixing area, prolonging the entrainment floating circulation stroke of a desulfurizing agent in molten iron and improving the desulfurizing agent particle mixing dispersion degree and the molten iron desulfuration efficiency can be achieved during actual production.

The invention discloses an environment-friendly centrifugal powder and particle mixing system for chemical production. The system comprises a bottom plate, a rotating device, a rotating plate device, an electric cylinder device, a supporting device, a frame body device, a motor device, a rotating frame device and a cover plate device, wherein universal wheels, a first vertical rod and a first idler wheel are arranged on the bottom plate; the rotating device comprises a first supporting rod, a first connecting block, a supporting plate, a limiting frame, a first fixed rod, a first connecting ring and a first pull line; the rotating plate device comprises a second connecting block, a rotating plate, a first spring and a second connecting ring; the electric cylinder device comprises an electric cylinder, a first support, a fixed block, a push rod and a third connecting block; the supporting device comprises a second spring, an elastic rod, a second fixed rod, a third spring, a second supporting rod, a second idler wheel, a fourth spring, a limiting rod and a third fixed rod; the frame body device comprises a frame body, a third supporting rod and a fourth fixed rod. The system disclosed by the invention can fully mix powder and particle raw materials, has high mixing efficiency, can mix evenly and reduces labor intensity of workers.

The invention discloses a supercritical assisted green regeneration process combining a double-rotator continuous mixer with a screw extruder. The supercritical assisted green regeneration process comprises the following steps: feeding rubber particles obtained by crushing and separating a waste tire into the double-rotator continuous mixer, wherein in a supercritical fluid environment, rubber particles are subjected to high-shearing and strong stretching effects of a double-rotator mixing flow field, so that the rubber particles are promoted to carry out low-temperature green devulcanizing regeneration; then, performing extruding forming on the rubber particles by the screw extruder, and finally, sealing, cooling and drying the rubber particles to obtain granular regenerated rubber, and packaging and warehousing the granular regenerated rubber. According to the process, a granular restored regenerated rubber product is prepared by virtue of directed selective green devulcanizing regeneration through low-temperature/high-shearing/strong stretching of the supercritical fluid assisted waste rubber particle mixing flow field of the double-rotator mixer; and by not requiring to add any chemical auxiliaries and only depending on the mechanical force chemical reaction principle in the production process, continuous, green and safe production of the granular regenerated rubber product is realized from waste rubber particles by utilizing stress inducing to break a three-dimensional grid structure in the product.

The invention relates to a centrifugal powder particle mixing device. A motor is arranged on a middle part of a base; a powder mixing tank is arranged on a power output shaft of the motor; a lower screen, an upper screen and a baffle drum are successively arranged in the powder mixing tank from bottom to top; holes in same diameter are formed in the center of each of the lower screen, the upper screen and the baffle drum; slots are formed between the baffle drum and the four walls of the powder mixing tank; a powder mixing tank cover is arranged on the powder mixing tank; a short shaft which is integrally connected with the powder mixing tank cover is arranged at the center of the outer surface of the powder mixing tank cover; a support rod is arranged on the base; a positioning disc is arranged on the support rod; and a groove which is matched with the short shaft is formed in the middle part of the positioning disc. The centrifugal powder particle mixing device has the advantages of simple operation, low cost, less damage to powder crystals, high mixing efficiency and wide popularization and application in the field of chemical industry production.