585 results about "Large particle" patented technology

The invention discloses a large-particle pneumatic conveying pipeline optimal wind speed calculation method based on digital twinning and machine learning, and the method comprises the steps: S1, carrying out the digital twinning modeling of a gas fluid region and large-volume particles, including an overall pipeline fluid model, fluid region grid division, a large-particle model, and a large-particle transportation volume fraction algorithm; s2, a gas-solid coupling numerical simulation experiment is carried out to calculate simulation data, and the optimal conveying wind speed for conveying spherical particles with different volumes and masses is obtained; and S3, fitting simulation data by adopting multiple linear regression analysis in machine learning, establishing a pipeline optimal wind speed calculation model, and determining a high-order term order of an independent variable. According to the method, digital twinborn modeling is conducted on the pneumatic conveying pipeline and the large-size particles, the optimal conveying wind speed for conveying the spherical particles of different sizes and masses is obtained through a gas-solid coupling numerical simulation experiment, and it is avoided that data are obtained through complex, tedious and even difficult-to-execute actual experiments.

The invention relates to the field of multiphase numerical simulation, and discloses a large-scale particle flow numerical calculation method based on multi-ball filling, and the method comprises the steps: obtaining a fluid domain grid size, a fluid density and a large particle radius; calculating the radius of the small filling ball according to the size of the fluid domain grid; based on golden angle spiral distribution and minimum distance coverage judgment, determining the number and the positions of small filling balls, and generating a large particle model of multi-ball filling; obtaining the background flow field speed of the large particles and the filling small balls in the current time step, and calculating the background flow field speed and drag force of the large particles; updating through iterative calculation to obtain the speed and the position of the large particles and the small filling balls in the next time step; and adding drag force as a source item into a momentum equation to solve fluid motion, and obtaining a fluid computational domain grid speed in the next time step. Accurate numerical simulation of large-scale particles is realized.

The invention provides a rapid detection method for water pollutants, which comprises the following steps: removing large-particle impurities and suspended solids in a water sample to be detected to obtain a target water sample; the method comprises the following steps: synchronously detecting multiple pollutant indexes of a target water sample through a multi-source sensor array to generate an initial detection data set; performing noise filtering and baseline correction on the initial detection data set to generate a target detection data set; performing space-time dimension dynamic fusion and feature decoupling on the target detection data set to generate water quality pollutant data and dynamic risk assessment indexes; and constructing a multi-dimensional risk assessment report by adopting the water quality pollutant data and the dynamic risk assessment indexes. By adopting a dynamic gradient filtering technology, impurity interference is effectively removed, dynamic risk assessment of a time dimension is realized, the accuracy and reliability of detection in a complex water quality environment are remarkably improved, and rapid and accurate water quality pollutant detection and risk assessment are realized.

The invention relates to the technical field of jet milling, in particular to a jet milling control method for a fluidized bed jet mill. The method comprises the following steps: acquiring the scattered particle weight increment of large particles and the fine weight increment of fine particles between adjacent sampling moments; dividing into an initial increasing stage and a uniform increasing stage according to the numerical value change of the weight increment of the scattered particles at the maximum value position; in the initial increasing stage, the retention degree is determined according to the trend change of the small weight increment; the drag force degree is determined according to the numerical comparison of the fine weight increment and the granular weight increment in the initial increasing stage and the uniform increasing stage; and determining an adjustment coefficient of the jet milling pressure by combining the retention degree and the drag force degree at the current moment, and regulating and controlling the jet milling pressure at the current moment according to the adjustment coefficient. The airflow crushing pressure can be adjusted and controlled more objectively and reasonably, and the airflow crushing efficiency is effectively improved.

The invention provides an optimization method of a magnesium slag sensible heat recovery system, which comprises the following steps: acquiring particle size distribution data of magnesium slag particles, and judging whether the problem of non-uniform particle size distribution exists or not according to a preset particle size threshold value; aiming at the problem of non-uniform particle size distribution, magnesium slag particles are classified by adopting a clustering algorithm, and the distribution areas of large particles and small particles are determined; according to the distribution area of the large particles, the rotating speed of the cooling roller is dynamically adjusted, and the accumulation probability of the large particles in the roller is reduced; the temperature change trend of the inner wall of the cooling roller is monitored in real time, and if it is detected that the local temperature abnormally rises, it is judged that local hot spots exist; when a local hot spot is detected, a spraying cooling system in the roller is started, and intensified cooling is conducted on a local area; pressure and temperature data of high-pressure and high-temperature water are collected in real time through a pressure sensor and a temperature sensor, and whether fluctuation exists or not is judged.

The utility model discloses a device for sorting copper and aluminum particles after crushing of waste lithium batteries, which is provided with a vibrating screen (1), and a material inlet at the upper part of the vibrating screen (1) receives materials generated by a crusher; the sorting device is also provided with a large particle sorting machine (4) and a small particle sorting machine (6); and a large particle outlet and a small particle outlet of the vibrating screen (1) are respectively connected with the large particle sorting machine (4) and the small particle sorting machine (6) through the conveying pipeline (3). By the adoption of the technical scheme, the copper-aluminum mixture generated in the waste lithium battery crushing and sorting process can be efficiently sorted, high-purity copper particles and aluminum particles are obtained, and recycling of waste materials is achieved; the process is reasonable and feasible, equipment is simple, and recovery cost is low.

The invention provides an arc-shaped deterministic lateral displacement chip and an application method thereof, and the chip comprises a target curve flow channel which is a curve with the curvature greater than 0 and is bent towards a single side; the barrier column array is arranged in the target curve flow channel; the obstacle column array comprises a plurality of obstacle columns which are arranged in order, and when a particle solution flows through the obstacle column array, the advancing routes of particles with different sizes are different. According to the scheme, the obstacle column array formed by the multiple obstacle columns which are arranged in order is arranged in the target curve flow channel with the curvature larger than 0 and bent towards the single side, so that the length of the flow channel is shortened under the condition that the particle sorting precision is not lost, and the area occupied by the flow channel is reduced. In addition, the arc-shaped deterministic lateral displacement chip provided by the specification can be used for efficiently sorting sticky particles, and can be used for accurately sorting larger particles in a particle solution with impurities and filtering the impurities at the same time.

An efficient smelting device for metal material manufacturing relates to the technical field of metal smelting furnaces, and is characterized in that when a feeding bin is used for feeding, materials are filtered by using an internal screen, so that the materials with smaller granularity in the metal materials preferentially enter a furnace body, and the materials with larger granularity are retained on the screen in the feeding bin; along with the increase of the feeding amount of metal materials in the furnace body and the increase of the self weight of the furnace body, the furnace body and the furnace frame are driven to integrally move downwards under the action of gravity, the furnace frame moves downwards to drive the connecting rod to move downwards, the connecting rod drives the transmission gear and the transmission shaft to rotate and pushes the supporting semi-ring to drive the screen to move, and a gap is formed between the screen and the side wall of the feeding bin. Metal with large granularity on the screen can fall down from the gap to be fed, feeding of the furnace body is controlled through the change of the feeding self weight of the furnace body, metal materials with small granularity firstly enter the furnace body, the metal materials with large granularity are buffered through the metal materials with small granularity, and the impact force of the metal materials with large granularity on the furnace body is reduced.

The invention relates to the technical field of ceramic product production and manufacturing equipment and a preparation process, in particular to a spray granulation process which comprises the following steps: preparing zirconium oxide slurry with the solid content of 90%, conveying the zirconium oxide slurry to a nozzle through a pipeline, and enabling the slurry to meet airflow at the nozzle and be atomized into tiny liquid drops; atomized liquid drops make contact with hot airflow for drying, the airflow temperature is controlled by a temperature control system to gradually rise from the inlet section to the outlet section of the main tower, and an airflow system adjusts the airflow speed and the airflow direction; the particles with the particle size larger than or equal to 40 micrometers fall to a discharging port in the bottom of the main tower under the action of strong airflow, and the particle size is lt; particles with the particle size of 40 microns flow to a brown air opening under the action of relatively weak air flow; the dried large particles are guided out from a discharge hole in the bottom of the main tower through a strong airflow regulator to be collected, and the dried small particles are collected through a connecting pipeline and a cyclone separator through an air inlet; the large particles are directly stored or subsequently processed, and the small particles are further processed or sub-packaged. Precise classified collection is achieved, and the granulation quality and the production efficiency are improved.

A mask repairing method comprises the steps that a mask is provided, the mask comprises a light-transmitting substrate and a light shielding layer, and the light shielding layer is located on the top of the light-transmitting substrate and exposes part of the surface of the light-transmitting substrate; particle defect detection is carried out on the mask; under the condition that the defect of the particulate matter is detected, a deposition layer is formed on the particulate matter, and the deposition layer and the particulate matter serve as a particulate matter structure; and removing the particulate matter structure through a cleaning process. The deposition layer is formed on the particulate matter defect, and the vertical height and the volume of the particulate matter structure are increased, so that the effect that the particulate matter structure is infiltrated by the cleaning solution is improved, the particulate matter structure is easy to remove in a cleaning mode, the removal effect on the particulate matter defect is correspondingly improved, and the quality of the mask plate is improved.

The invention relates to the field of debris flow disaster prevention and control, in particular to a method for predicting the flow of large-particle blocking and collapsing debris flow at the sudden shrinkage position of a channel, which comprises the following steps: determining the stress state information of large-particle materials according to the movement process of the large-particle materials in the channel along with debris flow; according to the stress state information and the stress balance condition, a flow prediction model of the large-particle blocking and collapsing debris flow at the channel sudden shrinkage position is constructed; building an experimental device, and placing a simulated large-particle material in the experimental device; obtaining debris flow characteristic parameters and large particle material motion characteristic parameters through an experimental device; and measuring the real channel to obtain a large particle material form parameter and a channel form parameter, so as to obtain the flow of the large particle blocking and collapsing debris flow at the channel sudden shrinkage part of the real channel. The experiment device is built to simulate the debris flow process for multiple times to obtain corresponding parameters, the debris flow is calculated in combination with the debris flow prediction model, and the debris flow prediction reliability is improved.

The invention belongs to the technical field of powder materials, and provides a method for improving the mixing uniformity of tungsten powder and element powder, and the method comprises the following steps: mixing the tungsten powder and the element powder, carrying out ball milling, and then carrying out ultrasonic cleaning to obtain first powder; sequentially carrying out three-dimensional mixing and ultrasonic cleaning on the first powder to obtain second powder; the second powder is subjected to double-cone mixing, and treatment is completed. Tungsten powder and element powder are mixed and then subjected to ball milling, different powder bodies are dispersed, and large particles are prevented from being agglomerated. Then, the mixed powder is cleaned in an ultrasonic cleaning mode, and a uniformly mixed system is obtained under the ultrasonic effect; under the action of three-dimensional mixing, mixed materials are accelerated to flow and diffuse, and agglomeration and accumulation caused by conventional mixing are avoided; and finally, under the action of double-cone mixing, the powder performs turbulent flow movement in the machine, and the materials are efficiently and uniformly mixed through complex impact, so that the tungsten powder and the element powder are mixed.

The utility model relates to an automatic weighing machine, which solves the problem of low efficiency during weighing of precious metals in the prior art. Comprising a shell, an electronic scale, a first feeding mechanism, a first feeding slide way, a second feeding mechanism, a second feeding slide way, a third feeding mechanism, a third feeding slide way and a cutter mechanism, and a storage barrel is arranged on a scale pan of the electronic scale. The automatic weighing machine is provided with the three feeding mechanisms, the first feeding mechanism can supply large-particle materials, the second feeding mechanism can supply small-particle materials, the rotating disc on the third feeding mechanism is wound with linear materials, the linear materials are conveyed through the feeding roller set, the cutter mechanism cuts off the linear materials, and the automatic weighing machine is convenient to use. In the weighing process, the large-particle materials and the small-particle materials are subjected to weight balancing to be close to the preset weight, then the linear materials are discharged and subjected to weight balancing compensation, the final weight balancing requirement is met, and therefore automatic weighing is achieved, weighing is accurate, and efficiency is high.

The application provides a low-crystallinity hydroxyapatite microsphere for implantation and a preparation method thereof, and the preparation method comprises the following steps: preparing a mixed solution of a calcium source reagent and a phosphorus source reagent, adding inorganic acid, alkali and a buffer into the mixed solution, adding a surfactant, and obtaining a hydroxyapatite micro-particle precipitate through constant-temperature reaction; cleaning the hydroxyapatite micro-particle precipitate, and preparing a hydroxyapatite micro-particle suspension by adding water; and performing spray drying on the hydroxyapatite micro-particle suspension to obtain the hydroxyapatite microsphere; wherein the surfactant is one or more of PEG and PVP. The hydroxyapatite microsphere obtained by the application has stable structure, belongs to spherical large particles, is easy to inject, and is not prone to agglomeration; when the hydroxyapatite microsphere is injected into a human body, the hydroxyapatite microsphere has good supporting effect; and the preparation method of the application is simple, has few process steps, and is easy to realize reaction conditions, and is suitable for large-scale production.

Provided is an image forming apparatus including a photosensitive drum and an intermediate transfer member, in which when an area of particles on a surface of the photosensitive drum is denoted by S1 and an area other than the particles is denoted by S2, S1 / (S1+S2) is at least 0.70 and not more than 1.00, and in a particle size distribution of the particles, when a particle size of a peak top having a larger particle size value between a first peak having the maximum frequency and a second peak having the second highest frequency among peaks having a particle size of 20 nm or more at a peak top is denoted by DA and an arithmetic mean curvature of peak points in a surface roughness shape of the intermediate transfer member is denoted by Spc, 80 nm≤DA≤2×(1 / Spc) is satisfied.

The invention discloses multi-stage screening and conveying equipment, and relates to the technical field of screening equipment. Comprising a screening shell, a screening mechanism used for conveying materials is arranged on the screening shell, the screening mechanism comprises an adjusting assembly, the adjusting assembly comprises two sets of supporting shafts connected in the screening shell in a penetrating mode, the outer walls of the supporting shafts are rotationally connected with sliding rail supports, and first screening nets connected through locking assemblies are arranged in the sliding rail supports; after entering the screening shell, materials are primarily screened through the first screening net, large particles or impurities are removed, then the materials fall into the second screening net to be screened more finely, particles with different particle sizes are further separated out, and the screening efficiency can be remarkably improved through the classified screening mode; the materials are classified more accurately according to the particle size, it is ensured that the screened materials meet the specification requirement, and the multi-stage screening conveying equipment can meet the screening requirements of the materials of different types and properties.

The utility model discloses an automatic sorting device for screening and sorting brown sugar particles. Brown sugar particles entering from the feeding port of the screening box body can be screened and classified through the vibrating screen, large particles can be left on the first screen mesh of the vibrating screen, small and medium particles fall onto the second screen mesh after passing through the first screen mesh, and small particles fall onto the second screen mesh after passing through the second screen mesh. Medium particles roll down from the inclined second screen mesh, large particles roll down from the first screen mesh fall onto one discharge hopper group under the action of the two discharge hopper groups, and after being guided out, the large particles are conveyed by the material conveying mechanism to be conveyed into the discharge hopper group. According to the automatic screening and sorting device, large particles are conveyed into the smashing assembly to be smashed and then enter the screening box body to be screened, the practicability of the automatic screening and sorting device is improved, large particles which do not meet the standard can be sorted out, smashed and then screened, small particles and medium particles which meet the standard are sorted out, and the screening efficiency is improved. And the sorting efficiency is also improved.

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 invention discloses a mineral substance feeding device. The mineral substance feeding device comprises a shell, a large particle separation bin, a medium particle separation bin, a small particle separation bin, a vibration separation mechanism and a material lifting and moving mechanism. The vibration separation mechanism comprises a vibration separation bracket, a material guide basin, a large particle separation sieve plate, a medium particle separation sieve plate and a vibration rotating mechanism; the vibration rotating mechanism drives the material guide basin, the large particle separation sieve plate and the medium particle separation sieve plate to vibrate and rotate; the large-particle separation sieve plate is used for separating large-particle mineral substances and throwing the large-particle mineral substances into the large-particle separation bin through rotary centrifugation, and the medium-particle separation sieve plate is used for separating medium-particle mineral substances and throwing the medium-particle mineral substances into the medium-particle separation bin through rotary centrifugation; the medium-particle separation sieve plate is used for guiding small-particle minerals into the small-particle separation bin; precise separation of particle minerals of different sizes is achieved, manual feeding is not needed, and it is ensured that nutritional ingredients in chicken feed are evenly distributed.

The invention discloses a preparation method of a quantifiable uniform regulation type particle strengthening and toughening composite material, a product and a quantitative calculation method of the product, relates to the field of particle reinforcement composite materials, and aims to solve the problem that in the prior art, gaps of large particle reinforcements are large. The preparation method comprises the following steps: preparing a cavity, uniformly distributing large-particle reinforcements in the cavity in a sweeping or pressurizing manner, finally, paving a powder material mixed with small-particle reinforcements, further filling gaps to prepare a basic unit material, and carrying out stacking, cold pressing, sintering and secondary densification treatment on the basic unit material to obtain the composite material. Compared with a common uniformly-distributed particle reinforced composite material, the reinforced composite material has the advantages of smaller porosity and better tensile strength, bending resistance and wear resistance.

The invention belongs to the technical field of coal gangue treatment, and particularly relates to an intelligent photoelectric separation cone barrel type screening and distributing device for coal gangue. The conical barrel structure with the large end facing upwards is adopted, and the gaps changing from large to small are formed among the conical barrels, so that materials with different particle sizes are automatically screened and orderly arranged under the action of gravity or external force, and the problems that in traditional material distribution, the particle sizes are disordered, and mixing and stacking are caused are effectively solved. According to the invention, particle size layering and space guiding can be completed in advance before materials enter an X-ray identification area, the overlapping and stacking phenomena of large particles and small particles are obviously reduced, and the separation degree and identification definition of the materials in an image are improved. The regularized material distribution enables the target boundary in the X-ray image to be clearer, thereby facilitating the accurate positioning and classification of an image recognition algorithm, improving the stability and robustness of an intelligent recognition model, indirectly improving the air jet blowing precision, and reducing the false blowing or missing blowing phenomenon.

The invention belongs to the technical field of solid waste resource utilization and inorganic material synthesis, and relates to a method for reducing the water content and particle size of active calcium silicate. According to the method, powdery quicklime or ground carbide slag is used as a calcium source, the reaction activity of the calcium source is improved through steam activation, then the calcium source is added into desiliconization liquid containing sodium silicate in batches, a reaction is carried out under the temperature control and stirring conditions, and finally, hot water ultrasonic washing and drying are carried out, so that an active calcium silicate product with low water content and fine particle size is prepared. According to the process, the problems of high water content, large particle size, impurity residues and the like in the traditional process are effectively solved by accurately controlling the Ca / Si molar ratio, temperature sectional reaction and ultrasonic-assisted washing. According to the method, the post-treatment burden of the product is remarkably reduced, the whiteness and the purity are improved, high-value utilization of high-calcium solid wastes such as the carbide slag is also realized, and the method has good industrial popularization prospects and environmental benefits.

The invention provides atomized silver powder and a preparation method thereof, and belongs to the technical field of metal powder preparation. According to the preparation method, through the synergistic effect of atomization powder preparation, two-step ball milling and mechanical crushing, two kinds of mixed state silver powder which is wide in particle size distribution, uneven in surface and irregular in edge and is in a thick sheet shape and a small-particle sphere-like shape are prepared. According to the method, more satellite spherical micron silver powder particles are prepared by controlling gas atomization powder preparation, then the large-particle satellite spherical silver powder is ground into sheets and is prevented from being scattered into small spherical particles through a primary flaking process and large-ball slow grinding, and in a secondary flaking process, small-ball quick grinding is added, so that the large-particle satellite spherical silver powder is prepared. According to the method, the silver powder of the middle size is rapidly ground into sheets, meanwhile, the form of the small-particle spherical silver powder is prevented from being damaged, finally, the surface of the sheet-shaped silver powder is modified through mechanical crushing, the target silver powder is obtained, a pure physical powder preparing technology is adopted, the production cost is low, environment friendliness is achieved, the batch stability is good, and the method can be directly used for electronic paste.

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 relates to the technical field of superfine fiber powder production, in particular to an anti-blocking filtering device for superfine fiber powder. According to the technical scheme, a feeding device is installed at one end of a feeding device, the feeding device is provided with a hopper, the bottom end of the hopper is connected with a connector, the feeding device is provided with a connecting pipe, an auger is installed in the connecting pipe, a screen pipe is arranged in the middle of the feeding device, and the feeding device is provided with a feeding hopper. A discharging opening is formed in the end, away from the feeding device, of the connecting pipe, and a screening device is installed on the portion, located outside the screening pipe, of the feeding device. A discharging pipe and an air inlet pipe are arranged on the screening device, a cavity is formed in the screening device, and the discharging pipe is communicated with the air inlet pipe through the cavity. The screen pipe is used for screening, large-particle impurities can be effectively separated from fine particles, the screen pipe is used for screening and discharging the large-particle impurities, and follow-up processing equipment can be effectively protected from being damaged by the large-particle impurities.

The anti-blocking mixer comprises a pipeline, first flange plates are fixedly connected to the left side and the right side of the pipeline, a feeding hole is formed in the outer side of the pipeline, a first feeding pipe is arranged in the feeding hole, a smashing structure is arranged at the upper end of the first feeding pipe, and a second flange plate is arranged at the lower end of the smashing structure. A first feeding pipe is fixedly connected to the outer side of the crushing structure, a second feeding pipe is fixedly connected to the outer side of the crushing structure, a second flange plate is fixedly connected to the outer side of the second feeding pipe, a mixing unit structure is arranged in the pipeline, the crushing structure comprises a hollow block, and the hollow block is fixedly connected to the upper end of the first feeding pipe. Through the arrangement of the crushing structure and the mixing unit structure, large particles in materials can be conveniently crushed before the material solution is mixed, the situation that the large material particles are condensed into a block and attached to the interior of a pipeline to block the pipeline is avoided, the workload of workers for frequently cleaning the pipeline is reduced, time and labor are saved, and convenience and rapidness are achieved.

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 present invention relates to the field of powder shaping machines, specifically to an automatic shaping machine for powder metallurgy products, comprising a sorting mechanism for screening and conveying metallurgical blocks of different particle sizes; a No. 1 shaping mechanism for rolling and shaping metallurgical blocks with smaller particles; and a No. 2 shaping mechanism for rolling and shaping metallurgical blocks with larger particles; the bottoms of the sorting mechanism, the No. 1 shaping mechanism and the No. 2 shaping mechanism are all provided with a support plate; wherein the No. 2 shaping mechanism comprises an electric push rod, and when the automatic shaping machine for powder metallurgy products coincides with the feed pipe through a circular hole, the metallurgical blocks inside the feed pipe will enter the feeding tray through the circular hole, thereby playing the role of periodically falling from the circular hole and falling just in front of the No. 1 sorting bar, and at the same time playing the role of making preliminary preparations for the subsequent screening of blocks of different sizes.

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 utility model belongs to the field of packing material processing devices, and particularly relates to a packing material processing device for mine construction, which comprises a device main body, the upper surface of the device main body is fixedly connected with a material distributing device, the material distributing device comprises a cover plate, the cover plate is arranged on the upper surface of the device main body, and the material distributing device is arranged on the cover plate. A conical spiral groove is formed in the inner wall of a feeding port of the cover plate, a dustproof cover is fixedly connected to the upper surface of the feeding port of the cover plate, and the bottom face of the dustproof cover is fixedly connected with one end of a connecting rod. According to the packing material treatment device for mine construction, materials fall into the areas of the material distribution rings in a relatively uniform state, and then the materials are further subdivided by the material distribution rings with different sizes in sequence, so that coal cinder particles are in a concentric circle shape and are discharged on the upper surface of a main material, and when the material distribution rings are impacted by relatively large particles or non-uniform materials, the coal cinder particles are separated from the main material. And the spring can make the material distributing ring vibrate rapidly through the elasticity of the spring, and the material distributing speed of the device is increased.