221 results about "Large particle" patented technology

An inlet for an analytical instrument comprises a transfer tube having an upstream end and a downstream end and a deposition region arranged at or adjacent to the upstream end of the transfer tube. The transfer tube is configured to transfer ions together with a gas flow from the upstream end to the downstream end. The transfer tube and the deposition region are configured such that the gas flow experiences at least one turn in the deposition region, whereupon relatively large particles entrained in the gas flow are deposited in the deposition region. The at least one turn in the gas flow is created by: a change in cross-sectional area of the gas flow in the deposition region, a change in diameter of the gas flow in the deposition region, and / or a change in cross-sectional shape of the gas flow in the deposition region.

The pulverizer in the ultrafine pulverizing device provided by this invention includes a vertical shaft that is rotatably arranged in the vertical direction and extends out of the housing of the ultrafine pulverizing device, multiple pulverizing mechanisms connected to the vertical shaft, and a first driving member for driving the vertical shaft to rotate. By arranging the multiple pulverizing mechanisms vertically along the vertical shaft, each pulverizing mechanism includes a cutter disc on the vertical shaft, multiple pulverizing blades on the cutter disc, and a toothed ring sleeved on the outer circumference of the cutter disc. A pulverizing gap is formed between the pulverizing blades and the toothed ring, and the toothed ring is fixed to the housing. The outer diameter of the toothed ring of the lower pulverizing mechanism is larger than that of the upper pulverizing mechanism, and the pulverizing gap of the lower pulverizing mechanism is larger than that of the upper pulverizing mechanism. After screening out materials with larger particles, the screened materials can be pulverized again using multiple pulverizing mechanisms to improve the fineness and pulverizing efficiency of the materials.

The utility model discloses a calcium hydroxide particle size accurate regulation and control device which comprises a workbench and a particle size regulation and control assembly used for accurately regulating and controlling the particle size of calcium hydroxide particles, a collecting hole is formed in one end of the upper surface of the workbench, and a fixing cylinder is fixedly installed at one end of the edge of the upper surface of the collecting hole. The particle size regulation and control assembly is detachably installed on one side of the fixing cylinder, an installation rod is fixedly installed at the other end of the upper surface of the workbench, an empty groove is formed in one side of the workbench, a vibration motor is arranged in the empty groove, and a linkage cylinder is fixedly installed at one end of the outer surface of the fixing cylinder. The whole structure has high regulation and control capacity on calcium hydroxide particles, accurate regulation and control can be carried out, the condition of mixing caused by large particle size span is avoided, particle size distribution is uniform, and application scenes with high particle size uniformity requirements can be effectively met.

The utility model discloses a millstone for a grain moisture test crushing mill in the field of crushing equipment, which comprises a static millstone and a movable millstone, a plurality of gear rings which are of concentric circle structures and can be meshed with each other are respectively arranged on the opposite surfaces of the static millstone and the movable millstone, and a plurality of large gear rings close to the inside are wider and higher than a plurality of small gear rings close to the outside. And a plurality of material guide grooves which penetrate through all the gear rings and divide the gear rings into a plurality of gear blocks are further formed in the opposite surfaces of the static grinding disc and the movable grinding disc. The gear rings and the material guide grooves are arranged on the static grinding disc and the movable grinding disc, materials move outwards along the material guide grooves and gaps among the teeth in the grinding process and are ground by the tooth blocks when passing through the connecting portions of the adjacent gear rings, meanwhile, due to the fact that the gaps of the large gear rings on the inner side are large, large particles are crushed firstly, the gaps of the small gear rings on the outer side are small, and then the particles are ground into powder, and the grinding efficiency is greatly improved. And the powder fineness is ensured, the high powder discharging efficiency is achieved, the problem that the temperature rise is too large due to too fast grinding can be avoided, and the moisture loss in the grinding process is reduced.

The invention discloses a coal density distribution and particle size distribution measuring system and method, and relates to the field of coal washing, and the system comprises a computer, an X-ray source, a detector, a rack, a rotating platform, a guide rail, a sample barrel and a coal sample screening device; a coal sample is contained in the sample barrel; the coal sample screening device is used for screening coal samples into large-particle coal samples and small-particle coal samples; the guide rail drives the rotating platform to move in the horizontal direction, the rotating platform drives the sample barrel to rotate, an X-ray beam emitted by the X-ray source irradiates in the horizontal direction, penetrates through the cross section of the sample barrel and reaches the detector, the detector sends collected coal sample X-rays and position information of the rotating platform to the computer for image reconstruction, and a coal sample CT image is obtained; and the computer is also used for calculating density distribution and particle size distribution of the coal sample according to the coal sample CT image. According to the invention, the accuracy and speed of density distribution and particle size distribution measurement can be improved.

Disclosed herein is a positive electrode active material with a combination of large and small particles, including large-particle secondary spheres and small-particle secondary spheres, where the mass ratio of the large-particle secondary spheres is not smaller than 50%; the D50 particle size of the large-particle secondary spheres is 10-20 μm, and the D50 particle size of the small-particle secondary spheres is 2-5 μm. The doping elements and nickel contents of large and small particles are strictly regulated to ultimately obtain a positive electrode material with good comprehensive performance in terms of capacity, cycling, and DCR. Also disclosed herein is a preparation method for the positive electrode active material with a combination of large and small particles.

The utility model belongs to the technical field of water-based release agent production, particularly relates to a water-based release agent production and preparation device, and provides the following scheme aiming at the problems that the production efficiency is reduced due to the fact that the emulsification time is prolonged due to existing large-particle substances, and materials or emulsifiers are wasted due to the fact that the large-particle substances are filtered. Comprising an emulsifying tank and a supporting frame, the emulsifying tank is arranged on the supporting frame in a penetrating mode, a heating wire for generating heat is arranged in the emulsifying tank, in the emulsifying device, due to the arrangement of a grinding assembly, materials can be ground immediately after entering the emulsifying tank, the refining degree and the emulsifying effect of the materials are effectively improved, and the emulsifying effect of the materials is improved. And meanwhile, the first fixing assembly and the second fixing assembly stably fix the movable grinding disc and the static grinding disc correspondingly, the stability of the grinding process is guaranteed, the weighing assembly guarantees the matching precision of materials, and the stability and performance of the product are improved.

Disclosed is a shear stable latex comprising functionalized fluoropolymer, a particle size modifier and a surfactant; said latex having solids content of at least 15 wt %, where the ratio of particle size modifier to surfactant is equal to or greater than 2 on a molar to molar basis.

The invention belongs to the field of conductive slurry, and particularly discloses a method for detecting the dispersity of slurry particles. The detection method comprises the following steps: centrifuging slurry, sampling from the bottom of the slurry, and forming a film on the obtained sample to obtain a test sample film; spraying metal on the surface of the test sample film, and observing the particle size and the number of large particles in the test sample film by adopting a scanning electron microscope; the centrifugation is as follows: the slurry is centrifuged for 3-12 times by adopting a centrifugal force of 500-3000g, and each time is centrifuged for 10s-7min. The large particles are actively enriched to the bottom of the slurry through centrifugation, and then are directly sampled and observed from the bottom, so that the large particles are more easily captured and analyzed. According to the method, the problems that in a traditional method, due to the fact that large particles naturally sink to the bottom in the drying film forming process and are difficult to be effectively observed by an electron microscope, size misjudgment and number missing detection are caused are fundamentally avoided, and therefore more accurate statistics and characterization of the large particles in the slurry are achieved.

The invention relates to a classifier based on airflow separation, comprising: a casing comprising a fixed cylinder, and a conical shell cavity and an ash bucket connected to the upper and lower sides of the fixed cylinder; an external air source is obliquely blown into the conical shell cavity in the tangential direction of an air outlet of the tangential air supplement volute; corresponding conical caps are fixedly mounted at the top of the fine powder discharging pipe at intervals; the ventilating and flow guiding conical shell is matched with the fine powder discharging pipe through a mounting hole of the ventilating and flow guiding conical shell so as to be mounted on the inner side of the tangent air supplementing volute; the ventilation flow guide conical shell is hollow and is provided with a corresponding inflation cavity, and the grading reinforcing mechanism comprises a plurality of micron air holes which are uniformly distributed in the conical surface of the ventilation flow guide conical shell. According to the device, the contact rate and the contact uniformity of materials and airflow can be effectively improved, and the entrainment amount of materials with small particle sizes when the materials with large particle sizes pass through an airflow washing area can be effectively reduced.

The invention provides a tungsten polymetallic tailing recovery method and system, and the method comprises the following steps: carrying out crushing and first mineral separation to realize first enrichment so as to obtain a first fraction mineral; second screening is carried out on the first-size-fraction minerals, second mineral separation is carried out on the fifth-size-fraction minerals with the large particle size obtained through second screening, second enrichment is carried out according to the density, and second concentrate is obtained; small-particle-size fourth-particle-size minerals obtained through second screening and the second concentrate are graded according to a preset particle size grading rule, multi-stage jigging ore separation is carried out, third enrichment is carried out according to the density, and third concentrate is obtained; and after multiple times of enrichment, the third concentrate is ground and subjected to mineral separation, and target concentrate is obtained. Through multi-stage crushing, dense medium ore dressing according to density and multi-stage jigging ore dressing, multiple enrichment is carried out, the ore dressing efficiency is effectively improved, the ore grinding amount of grinding is reduced, the grinding cost is reduced, and the production cost is reduced.

The invention discloses an absorption tower capable of preventing crushed aggregates from entering a circulating pump groove, and relates to the field of absorption towers, the absorption tower comprises a tower and a filter part, the filter part is in a cylindrical shape with inner diameter difference between two ends, and the filter part is erected in the tower from top to bottom in a manner of becoming thin from thick; and a convex bottom is arranged at the part, connected with the bottom end of the filter piece, of the tower. According to the absorption tower capable of preventing the crushed aggregates from entering the circulating pump groove, the filter piece is arranged, the filter piece is in a barrel shape with the inner diameter difference between the two ends, and the filter piece is erected in the tower from thick to thin from top to bottom, so that compared with a filter screen which is directly erected, the filter piece with a slope surface structure can well bear direct impact of large particles above the filter piece, and the filter piece can be prevented from entering the circulating pump groove; meanwhile, the slope surface structure is beneficial to guiding particles to slide down along the slope surface, so that local accumulation of the filter surface is effectively avoided, and stable flow section and flow velocity are maintained; and a convex bottom is erected between the inner bottom of the tower and the filter element, so that the circulating liquid naturally flows towards the two sides of the convex bottom in the operation process of the absorption tower, and an accelerated discharge effect is formed.

The application discloses a multi-stage gradient anti-silt underwater equipment, which comprises a static part and a rotating part rotating relative to each other. Outside the core support gap, a flow guiding and sand throwing part and an expansion and sedimentation part are arranged in sequence from upstream to downstream along the water flow direction. The flow guiding and sand throwing part is an annular step arranged on the static part, which utilizes water flow inertia separation to throw large particle silt out of the side; the expansion and sedimentation part is an annular groove arranged on the inner hole wall of the static part, which utilizes the low-speed vortex area formed by the sudden change of the flow passage section to make fine sand particles settle and be intercepted in the groove; the two parts are cooperated with each other, and the different particle size silt is classified and intercepted through inertia separation and vortex settlement respectively. An end face flow guiding part can also be arranged, which generates centrifugal force relying on the mechanical movement of the rotating part to dredge fine particles. The application has simple structure, no vulnerable parts, and is suitable for silt-containing underwater working conditions, and can prolong the service life of the equipment.

The utility model discloses a mixing device for EVA particle processing, which comprises a stirring box, the top of the stirring box is fixedly connected with a filter box, the top of the filter box is provided with a feed inlet, the bottom of the stirring box is fixedly connected with a discharge pipe in an inserted manner, one end of the filter box is fixedly connected with a first discharge plate, the first discharge plate is located on the outer side of the filter box, and the first discharge plate is connected with a second discharge plate. And the other end of the filter box is fixedly connected with a second discharge plate, and the second discharge plate is positioned in the filter box. According to the EVA particle screening device, EVA particles with the largest particle size are screened out through the first screening plate, then the EVA particles with the largest particle size roll into the collecting box below along the first discharging plate to be collected, then the EVA particles with the largest particle size roll into the collecting box below along the first discharging plate to be collected, and therefore EVA particle screening is achieved. And the screened EVA particles can be discharged in time, so that the EVA particles are prevented from being accumulated in the filter box.

1. Name of the product in this design: Sorting Machine. 2. Application of this design: This design is used for sorting large particles such as ores. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1. 5. The bottom view of this product is for parts that are not easily seen or cannot be seen during use, so the bottom view is omitted.

A compound contains a metal powder, and a resin composition. The metal powder is a soft magnetic material. The resin composition contains a thermosetting resin. The compound powder contains a plurality of large particles with a particle diameter of greater than 500 μm. A content of the large particles in the compound powder is 40% by mass or more and 100% by mass or less. At least a part of the plurality of large particles includes at least one metal particle constituting the metal powder, and the resin composition covering the metal particle.

The utility model discloses a screening device suitable for grading large particles, which comprises a frame body, one end of the frame body is hinged with an adjusting frame, the adjusting frame is provided with a pair of supporting plates, a roller is rotatably connected between the supporting plates through a rotating shaft, a pair of conical sieves with gradually decreased sieve pores are arranged in the roller, and the conical sieves are arranged on the frame body. The roller is provided with a gear ring and a discharging port, the gear ring is matched with a gear, the gear is connected with a motor, the lower end of the adjusting frame is hinged to one end of a telescopic rod, and the other end of the telescopic rod is hinged to the frame body. The device has the advantages of reducing impact damage, improving the grading screening efficiency and dynamically adjusting the angle.

This invention provides a steel with excellent machinability, capable of suppressing cracks during hot working and melt cracks during high-frequency quenching, and exhibiting excellent fatigue strength when used as a component in mechanical structures. The steel contains, by mass percent, C: 0.20–0.50%, Si: 0.01–0.80%, Mn: 0.50–2.00%, P: less than 0.030%, S: 0.010–0.095%, Cr: 0.01–1.30%, V: greater than 0.200% and less than or equal to 0.300%, Bi: 0.0051–0.1500%, and N: 0.0030–0.0200%, and satisfies the following formula (1). In the steel, the number density of fine Bi particles is 80–8000 particles / mm. 2 The number density of coarse Bi particles is 10 particles / mm. 2 Below. 0.80≤C+(Si / 10)+(Mn / 5)-(5S / 7)+(5Cr / 22)+1.65V≤1.50(1).

The application discloses a large-particle impurity filtering device and filtering method for water quality detection, and belongs to the technical field of water quality detection. The large-particle impurity filtering device for water quality detection comprises a shell, and a water inlet is arranged on the shell. The filtering structure is arranged. When the device is used, the filter screen filters the water to be filtered. When the filter screen is used for a period of time, the second motor is started, the second motor drives the transmission wheel to rotate, the rotating shaft drives the annular plate to rotate by 180 DEG, the positions of the two filter screens are exchanged, the cleaning brush cleans the impurities on the circular fixed plate and the sealing cover, the impurities are moved to the position of the impurity discharge port, the impurities do not affect the water quality detection, the filter screen of the filtering device can be alternately used, manual cover opening and cleaning are not needed, and the filtering device does not affect the efficiency of the water quality detection.

The application discloses a precursor and a preparation method thereof, to avoid the problem that the electrochemical performance of a positive material prepared by using a large-particle precursor is poor due to the fact that the large-particle precursor is easy to crack. x Co y Mn z (OH)2, the precursor is a secondary particle composed of primary particles, the secondary particle has a median particle size D 50 ≥ 9 μm; wherein 0.40 ≤ x ≤ 0.98, 0 ≤ y ≤ 0.50, 0 ≤ z ≤ 0.50, and x + y + z = 1; in the secondary particle, the number of surface crack-containing particles is less than or equal to 2, and the number of the surface crack-containing particles is obtained by shooting an SEM image with a magnification of 1.0K.

The invention relates to the technical field of geological exploration sampling equipment, and particularly provides a sampling device for mineral geological exploration, which comprises a sampling drill bit, a double-wall drill rod and a sampling tail braid which are coaxially connected and is provided with a switch assembly, and the switch assembly can control communication of a second annular channel and a spiral groove. When the sampling drill bit drills a hole, the second annular channel can be communicated with the spiral groove, so that large-particle chips generated by the sampling drill bit are discharged from the spiral groove, small-particle chips are discharged from the outer side of the spiral groove, the function of dividing large and small particles is achieved, and the blocking frequency of the spiral groove is reduced; when the sampling drill bit is used for sampling, the second annular channel and the spiral groove can be blocked, so that most of gas enters the double-wall drill rod through the inner drill bit more easily, most of the gas carries a sample to enter the double-wall drill rod and is discharged from the interior of the sampling tail braid, and the conditions that sampling is interrupted and sampling cannot be carried out are avoided.

An injection port (e.g., an atmospheric injection port) for an analytical instrument (e.g., a mass spectrometer) includes a transfer tube having an upstream end and a downstream end and a deposition region disposed at or adjacent the upstream end of the transfer tube. The transfer tube is configured to convey ions along with the gas flow from the upstream end to the downstream end. The transfer tube and the deposition region are configured such that a gas stream undergoes at least one diverting within the deposition region such that relatively large particles entrained in the gas stream are deposited in the deposition region, and relatively small particles entrained in the gas flow remain entrained in the gas flow and are conveyed through the deposition area towards the downstream end of the transfer pipe. The at least one diverter in the gas flow is produced by a change in the cross-sectional area of the gas flow in the deposition region, a change in the diameter of the gas flow in the deposition region and / or a change in the cross-sectional shape of the gas flow in the deposition region.

The utility model discloses a three-shaft crusher which comprises a stock bin, and a first crushing device, a transverse conveying device and a second crushing device which are sequentially arranged in the stock bin from top to bottom, the first crushing device, the transverse conveying device and the second crushing device are all driven by a motor, and the bottom of the stock bin is provided with a stock bin discharge port. According to the utility model, the first crushing device, the transverse conveying device and the second crushing device are arranged in the same stock bin, so that materials are crushed for the first time by the first crushing device to obtain products with larger particles, and are crushed for the second time by the second crushing device to obtain products with smaller particles; and the transverse conveying device conveys products of the first crushing device into the second crushing device, so that due to the structural design, the structure of the whole crushing device is simpler, required products are directly obtained after crushing, manpower is saved, the labor intensity of workers is reduced, and the crushing efficiency is greatly improved.

The invention belongs to the field of new energy, and discloses an African spodumene beneficiation process which comprises the following steps: step 1, crushing African spodumene ore to obtain a crushed product; step 2, carrying out ball milling on the crushed product to obtain a ball-milled product; 3, light components and heavy components in the ball-milling product are separated, and a first light component and a first heavy component are obtained; 4, at least part of mica particles in the first light component are removed, and slurry is obtained; step 5, removing slime in the slurry to obtain a second heavy component; and step 6, carrying out first flotation treatment and second flotation treatment on the second heavy component. According to the process, ball milling is conducted firstly, then large-particle mica is removed, then desliming is conducted, and finally flotation of mica and spodumene lithium concentrate is conducted, the problem that spodumene is difficult to be smoothly sorted due to the fact that the mica content is too high and the ore mud content is large is solved, compared with a traditional process, the recovery rate of the lithium concentrate is increased by 2%-6%, and the operation recovery rate of spodumene is higher than 70%. Meanwhile, the invention further discloses a system suitable for the process.

The invention discloses spherical silicon dioxide particles, silica sol containing the spherical silicon dioxide particles and application of the spherical silicon dioxide particles in a polishing solution. The spherical silicon dioxide particles are characterized in that the average particle size of the spherical silicon dioxide particles is selected from any value in the range of 20-200 nm, and the polydispersity index PDI of the particle size of the spherical silicon dioxide particles is smaller than or equal to 0.10. The spherical silicon dioxide particles have the characteristics of large particle size, uniform distribution and low metal content. Amino groups and sulfonic acid groups are introduced to the surfaces of nano-particles in the preparation process, so that the stable silica sol under the acidic condition is obtained. According to the preparation method, only instruments and equipment which do not contain metal elements are used, and metal ion pollution is avoided. The acidic chemical mechanical polishing solution prepared from the spherical silicon dioxide particles can improve the polishing rate and prevent metal ions from polluting wafers, so that the chemical mechanical polishing efficiency is improved.

The invention belongs to the technical field of belt conveyor pretreatment equipment, and particularly relates to a coal briquette pretreatment device for a belt conveyor, which comprises a crusher main body, and a treatment box is fixedly connected to the crusher main body. The technical means that the crusher body and the treatment box are matched is adopted, preliminary particle size screening is conducted on input materials through the screening inclined plate arranged in an inner cavity of the treatment box, the materials with the large particle size and the small particle size enter the first rotating cylinder and the second rotating cylinder correspondingly, and the first rotating cylinder conducts heating treatment on the materials with the small particle size through the arc-shaped electric heating plate and the striker plate and conducts fixed-weight discharging; and when the second rotating cylinder rotates, a first arc-shaped abutting rod is matched with a spring set to drive a guide plate and other components to move, and the blended materials are intermittently conveyed to the feeding end of the crusher, so that resource waste is avoided, the operation process of equipment is simplified, and the working efficiency is improved. And the overall maintenance cost of the equipment can be reduced.

This utility model discloses a pulverizer for the production of thermal spraying materials, relating to the field of pulverizing technology for spraying materials. It addresses the problem of unsatisfactory pulverizing effects and the tendency for large particles to remain after pulverization. The pulverizer includes a pulverizing cylinder with a rotary motor fixedly connected to its bottom. A rotating shaft is fixedly connected to the output end of the rotary motor. A pulverizing mechanism is located at the top of the outer surface of the rotating shaft, and a grinding mechanism is located at the bottom of the outer surface of the rotating shaft. This utility model, by incorporating a rotary motor, rotating shaft, pulverizing roller, first pulverizing teeth, arc-shaped plate, and second pulverizing teeth, can pulverize the thermal spraying material raw materials fed into the pulverizing cylinder. By incorporating a rotary motor, rotating shaft, grinding disc, and grinding plate, it can grind the pulverized raw materials, reducing large particles into finer particles for easier subsequent use. This method provides good pulverizing effect on thermal spraying material raw materials, produces uniform pulverized particles, and has high production efficiency.

The application relates to a positive electrode active material, a positive electrode sheet and an electrochemical device. The positive electrode active material comprises first particles, second particles and third particles with different particle sizes and specific surface areas, at least one of the first particles, the second particles and the third particles is coated on the surface and doped in the interior with preset particles; wherein the first particles have the largest particle size and the smallest specific surface area, the volume particle size is 15 mu m to 21 mu m, the specific surface area is 0.05 m 2 / g to 0.2 m 2 / g; the second particles have a particle size and a specific surface area in the middle, the volume particle size is 3 mu m to 7 mu m, the specific surface area is 0.2 m 2 / g to 1 m 2 / g; the third particles have the smallest particle size and the largest specific surface area, the volume particle size is 0.5 mu m to 3 mu m, and the specific surface area is 1 m 2 / g to 3 m 2 / g. The scheme provided by the application can meet the high energy density of the battery by matching the positive electrode active particle material with three particle sizes, different specific surface areas, and surface coating or internal doping of preset particles, while the rate performance and high and low temperature performance of the battery are considered.

The utility model provides crushing and vibration impurity removal equipment for particles in pyrolytic carbon black, which belongs to the technical field of thermal cracking treatment and comprises a crusher, a vibration impurity removal sieve and an iron remover. The crusher comprises: a housing having a crusher feed port and a crusher discharge port; the two grinding rollers are oppositely arranged in the shell, one side of a gap formed between the two grinding rollers corresponds to a feed port of the crusher, and the other side of the gap corresponds to a discharge port of the crusher; the driving device drives the two grinding rollers to rotate in opposite directions; the vibration impurity removal sieve is obliquely arranged downwards from the feeding end to the discharging end, the feeding end is connected with a discharging port of the crusher, and the discharging end is provided with a non-metal impurity discharging port and a carbon black discharging port after vibration impurity removal. The utility model solves the technical problem that carbon black particles generated by pyrolysis need to be crushed before being ground, and has the characteristics that the large-particle carbon black can be crushed into smaller particles, so that the particles are more easily dispersed in a medium, and the uniformity and the stability of the carbon black are improved.