358 results about "Particle Size Analyzer" patented technology

The invention provides an intelligent control method and system for a lithium carbonate preparation process, and the method comprises the steps: collecting the temperature field, ion concentration, feeding flow velocity and turbulence intensity data of a reaction kettle through a sensor array, and generating a state feature vector through multivariate analysis; inputting the feature vector into a depth prediction model to output a particle size distribution probability cloud picture and an impurity trend; inputting the probability cloud picture and the impurity trend into a multi-target optimizer to generate a temperature compensation value, a feeding correction coefficient and a stirring adjustment instruction; inputting the instruction into an anti-interference execution module and converting the instruction into an equipment driving signal; actual crystal data are obtained through an online particle size analyzer, and the prediction model is updated; and outputting a closed-loop optimization instruction to the execution terminal through the digital twin platform. The product consistency and the production stability are synchronously improved through full-process closed-loop intelligent control, and reliable technical support is provided for continuous production of battery-grade lithium carbonate.

The invention relates to the technical field of high-performance structural ceramic materials and corrosion resistance optimization thereof, in particular to a preparation method of high-performance silicon nitride ceramic, which realizes performance improvement through dynamic optimization of a composite sintering aid, closed-loop regulation and control of air pressure sintering and multi-process data linkage. In the raw material pretreatment stage, a laser particle size analyzer is adopted for monitoring particle size distribution in real time, surface modification parameters are adjusted in a linkage mode, and a uniform monomolecular coating layer is formed; the proportion of rare earth oxide and aluminum oxide in the composite sintering aid is dynamically adjusted according to the fluctuation of the mixing torque, and agglomeration and segregation of the aid are inhibited. And in the air pressure sintering stage, the argon pressure and the heating rate are dynamically adjusted based on the slope of a shrinkage curve, and directional arrangement of beta-phase grains is promoted by combining low-temperature nitrogen protection and high-temperature argon densification. And multi-dimensional process control synergistically optimizes grain boundary components, structure and density, so that the corrosion resistance and the service life of the silicon nitride ceramic in a sulfur-containing environment are remarkably improved and the service life of the silicon nitride ceramic in the sulfur-containing environment is remarkably prolonged.

The invention relates to the technical field of laser particle size analyzers, in particular to a laser particle size analyzer with a double-ultrasonic structure, which comprises a particle size analyzer body, a sample pool is arranged on the particle size analyzer body, a sample dispersion mechanism for crushing particle blocks is arranged in the sample pool, and a stirring auxiliary mechanism for preventing suspended particles from settling is arranged above the sample pool. The stirring auxiliary mechanism can push the particles to a sound field strong area of the sample dispersion mechanism so as to improve the dispersion efficiency, and a splash-proof covering mechanism is arranged at the upper end of the sample pool. By arranging the sample dispersion mechanism and adopting a mode of combining phase orthogonality and material orthogonality layout, a stable three-dimensional acoustic vortex can be formed in the sample pool, and the coverage range of the ultrasonic cavitation effect can be obviously improved, so that the particle dispersion uniformity is improved, and the particle dispersion efficiency is improved. A detachable low-frequency ultrasonic vibrator is adopted at the bottom, so that the penetrating power of a high-concentration and high-viscosity sample is further enhanced, and dispersion dead angles can be effectively eliminated.

The invention belongs to the technical field of image processing, and particularly relates to an ore grinding and screening monitoring method and system based on image particle size analysis, and the method comprises the steps: collecting an ore image, generating a distance transformation diagram, and constructing an extreme value topology network; calculating the relative topology significance of adjacent maximum value points, and constructing a peak-valley independence index in combination with the spatial distance; performing iterative fusion on the maximum value points based on the peak-valley independence index to obtain a final mark set; and performing watershed segmentation by taking the final mark set as a seed, calculating ore particle size cumulative distribution, extracting a characteristic particle size index, and adjusting grinding process parameters according to the characteristic particle size index. Through the combined constraint of the relative topology saliency and the peak valley independence index, the method can adapt to multi-scale features and effectively eliminate the interference of the surface texture of the ore, solves the problem of over-segmentation caused by rough surface in the traditional method, and realizes the real-time optimization, energy conservation and consumption reduction in the grinding process.

The invention relates to a preparation method of a high-thermal-conductivity hexagonal boron nitride film in the technical field of new materials, which comprises the following steps: acquiring particle size distribution data of hexagonal boron nitride powder treated by silane, and measuring the distribution condition of hexagonal boron nitride particles with different particle sizes by a particle size analyzer to obtain a particle size distribution curve; the influence of key process parameters on the heat-conducting property, the mechanical strength and the flame-retardant property is verified through experiments, performance data under different process parameters are obtained, and the influence rule of silanization treatment conditions on the surface property of hexagonal boron nitride and the performance of the composite material is focused on; and according to the heat-conducting property, the mechanical strength and the flame-retardant property data, optimizing process parameters by adopting a particle swarm optimization algorithm in a multi-objective optimization algorithm to obtain an optimal process parameter combination.

The invention discloses high-purity quartz sand airflow crushing and ultra-fine refining equipment, and relates to the technical field of quartz sand refinement, the high-purity quartz sand airflow crushing and ultra-fine refining equipment comprises a mounting bottom plate, a controller is arranged at the top of the mounting bottom plate, and feeding equipment used for conveying quartz sand is arranged at the position, close to the center, of the top of the mounting bottom plate. According to the high-purity quartz sand airflow crushing and ultra-fine refining equipment, when high-purity quartz sand needs to be subjected to fine crushing, firstly, materials are conveyed into a primary crushing bin, the quartz sand is subjected to ultra-fine crushing through a plurality of first high-pressure nozzles, and when a laser particle size analyzer detects that the granularity of the crushed materials is large, the materials are conveyed into a secondary crushing bin through a plurality of second high-pressure nozzles; and a plurality of second high-pressure nozzles are moved upwards to the positions flush with the outer surfaces of a plurality of first high-pressure nozzles, the material crushing angle and strength are increased, and the problems that in the prior art, in the process that crushing equipment crushes high-purity quartz sand, the spraying angle and the coverage range of high-pressure airflow are relatively single, and the crushing efficiency is low are solved.

The invention provides an ore particle granularity detection device and method based on a flexible vibration disk, and the device comprises the flexible vibration disk which is used for vibrating an ore material at a certain frequency and amplitude, so that the ore material is uniformly distributed and is in a proper posture; the image acquisition device is used for continuously shooting the ore materials on the flexible vibration disc to obtain ore images; the image processing device is used for carrying out preprocessing, segmentation, feature extraction and particle size analysis on the ore image and outputting the ore particle size distribution condition and an accumulative distribution curve; and the result output device is used for displaying the ore image and the granularity analysis result. According to the invention, while material accumulation is prevented, real-time, accurate and efficient detection of attitude distribution of ore materials is realized, and the method has the advantages of low cost of detection equipment, easy maintenance, strong interference resistance, high accuracy and stability of detection results, and the like.

The invention relates to the technical field of coal gangue magnetic separation, in particular to a coal gangue magnetization fluidized roasting device which comprises a raw material preprocessing module, a fluidized magnetization roasting module, a magnetic separation module, a data center module and a mass feed module. The raw material preprocessing module realizes gradient crushing and dynamic screening of coal gangue through a multi-stage crushing unit and a closed cycle pneumatic classification device, and the online particle size analysis device monitors particle size data in real time and transmits the particle size data to the data center module; the fluidization and magnetization roasting module adopts a double-cavity reaction tower structure, and is combined with an infrared thermal imager array and a PI (Proportional Integral) controller to regulate and control the mixing proportion of fluidization gas and inhibit the oxidation of ferric oxide; through multi-module data driving optimization, the technical problems of insufficient multi-variable coupling regulation, low separation precision and high energy consumption are solved, and low-carbon efficient resourceful treatment of the coal gangue is realized.

The invention relates to the technical field of grading gangue selection of coal gangue, in particular to a grading gangue selection method of coal gangue, which comprises the following steps: acquiring mineral texture data through a multispectral imaging device, analyzing the spatial distribution of aluminum and silicon elements in combination with an X-ray diffractometer, and generating a three-dimensional component map through spatial registration and fusion with infrared heat value data; impurities are dynamically removed through sulfur element spectrum detection, and the air pressure and the material flow of winnowing equipment are adjusted by matching roasting process parameters; components of the sorted waste are analyzed through an X-ray fluorescence spectrometer, particle size data are obtained through a laser particle analyzer, a genetic algorithm is input to iteratively optimize detection channel combination and sampling density, a resource distribution instruction is generated, and equipment parameter correction is fed back. According to the method, aluminum-silicon ratio critical value accurate identification, sorting parameter dynamic adaptation and waste recycling path optimization are realized, and the problem of overburning caused by insufficient quantitative analysis of element distribution in the prior art is solved.

The invention relates to the technical field of particle size analysis, solves the technical problem of signal distortion in rodlike abrasive dust particle size monitoring in a high-intensity magnetic field environment, and particularly relates to an inverse Fourier transform particle cross detection method and system for a laser particle analyzer, and the method comprises the following steps: collecting an original scattered light intensity signal and magnetic field intensity data; calculating a magnetic field change gradient based on the magnetic field intensity data; calculating a predicted phase offset used for eliminating signal distortion caused by rotating speed abrupt change by using the magnetic field change gradient; and identifying an oscillation risk period based on the magnetic field change gradient and a preset risk determination threshold. The method breaks through the hypothesis of a traditional Mie theory on spherical particles, establishes a scattering kernel function of the rod-shaped particles based on a T matrix theory, introduces a magnetic field coupling term, and quantifies the influence of a magnetic field on particle orientation and scattering signals. The situation that single particles are misjudged as multi-size mixed particles due to scattering double-peak artifacts caused by directional arrangement of the rod-shaped particles in a high-intensity magnetic field is avoided, and the particle size inversion precision is remarkably improved.

The invention provides a reverse particle size analysis method and system for a lithium ion battery, and the method comprises the steps: carrying out the detailed disassembly, cleaning, adhesion, stripping and high-temperature treatment of a to-be-analyzed cell, can accurately analyze the particle size distribution of an electrode active material in the positive and negative electrode materials of the lithium ion battery, guarantees the purity and activity of the electrode active material, and improves the detection accuracy. Therefore, the particle size analysis result is more accurate and reliable. According to the invention, the performance of the battery material is optimized, the safety of the battery is improved, the service life of the battery is prolonged, and important data support is provided for research, development and improvement of the battery material.

The invention discloses a dual-lens laser particle analyzer with an automatic calibration function. The dual-lens laser particle analyzer comprises a lead-in assembly, a shaking assembly and a mist brushing assembly, the introduction assembly is used for mixing and introducing to-be-measured particles and a water source, the shaking assembly is used for continuously shaking the particles of a to-be-measured mixed solution so as to ensure that the particles are uniformly dispersed, and the mist brushing assembly is used for brushing away mist which is generated on a lens due to too high humidity and interferes with the laser measurement degree. Through the combination of the first fixing plate, the first fixing shaft, the fixing ring and the torsional spring, the first sample pool can flexibly shake within a certain range, the motor drives the reciprocating lead screw to drive the toothed plate to move, the first sample pool can shake and swing, and through the continuous and diverse movement mode, the detection accuracy is improved. The uniform distribution of the particles in the solution is ensured, the interference of particle precipitation or aggregation on the measurement result is avoided, and the accuracy of measuring the particle size by the laser particle analyzer is obviously improved.

The invention relates to the technical field of molten salt treatment, and discloses a molten salt recovery system based on a steel belt cooling granulator. The system comprises a molten salt physical property monitoring module, a viscosity modeling module, a cooling optimization module, a partition temperature control module, a phase change monitoring module, a dynamic adjustment module, a particle size analysis module, a quality grading module, a pneumatic conveying module and a waste heat recovery module. The progressive crystallization control of the molten salt particles is realized; a heat pipe type heat exchanger and an organic Rankine cycle system are integrated at the waste heat recovery end, so that comprehensive energy consumption is reduced; the environment regulation and control end monitors the workshop temperature and humidity in real time based on a dew point calculation model, and the long-term stability of hygroscopic fused salt particles is guaranteed. According to the method, four technical bottlenecks of out-of-control crystallization, energy waste, classification loss and environmental interference in fused salt recovery are overcome, and low-cost, high-purity and zero-waste fused salt resource recycling is realized.

The invention relates to spraying equipment for preventing and controlling atmospheric pollution in the field of spraying devices, and through a plurality of nozzles mounted on a rotating ring and an inserting cylinder driven by an electric push rod, the nozzles are quickly replaced, the spray particle size is quickly and accurately adjusted, and the mode of manually replacing the nozzles is replaced; the spray particle size adjusting efficiency and accuracy are improved, the requirement of low-temperature weather for the fog drop particle size is met, fog drop icing is delayed, and the dust adsorption capacity of fog drops at the low temperature is improved; meanwhile, the spray particle size is detected in real time through a laser particle size instrument arranged on the front side of the air blowing cylinder, and when it is found that the spray particle size does not meet the requirement, early warning is given out in time to remind an operator to conduct maintenance, and waste of sedimentation liquid is reduced; in addition, by arranging a heating sleeve and a heat exchange pipe, the sedimentation liquid is preheated and heated in winter, the freezing speed of the fog drops is further delayed, the dust particle adsorption effect of the fog drops is improved, and energy is saved.

The invention relates to the technical field of automatic control, in particular to a PE thermal insulation pipe production equipment control method and system.The method comprises the following steps that based on raw material particle size distribution characteristics, heating temperature control parameters are adjusted, the viscosity state is recognized in combination with screw torque and rotating speed, and the feeding rate of each section is adjusted according to the viscosity difference; forming uniformity is calculated and foaming agent injection parameters are adjusted in combination with a foam structure, and flow velocity parameters of a cooling area are adjusted in combination with thermal load evaluation. According to the invention, by introducing raw material particle size analysis parameters and combining torque and viscosity change characteristics, the heating temperature control and extrusion viscosity adjustment process is optimized, the adaptability of equipment to material physical property change is enhanced, the foaming agent injection process is fed back by using foam structure distribution, the foaming uniformity and injection accuracy are improved, and the foaming efficiency is improved. And by adopting linkage analysis of heat release intensity and cooling rate, dynamic regulation and control of the cooling circulation rate are realized, and the consistency and stability of cooling shaping are improved.

The utility model relates to the technical field of powder metallurgy, in particular to a superfine tungsten powder reduction rotary furnace which mainly comprises a furnace body, a heating wire, a support, a furnace tube component and a detection component. The design of the spiral lifting plate is optimized in different reaction stages, the reduction efficiency is improved, the oxygen content of the tungsten powder is reduced, the spiral lifting plate is not arranged in the cooling section, the rotation resistance is reduced, then the power consumption of the motor is reduced, the tungsten powder is cooled by arranging reverse hydrogen, the reverse hydrogen is heated and transmitted to the deoxidation section, and the oxygen content of the tungsten powder is reduced. The energy is further saved, the tungsten powder is prevented from growing up, the laser particle size analyzer is arranged to detect the particle size of the tungsten powder in real time, the process is rapidly adjusted, quality deviation is avoided, the recovery rate of the tungsten powder is improved, and the situations that the powder particle size distribution is wide and deoxidation is not thorough are avoided.

The invention relates to a particle dispersion evaluation method of a positive electrode material and application thereof, and the particle dispersion evaluation method comprises the following steps: adding the positive electrode material into a solvent, and carrying out dispersion treatment to obtain a to-be-detected dispersion liquid; the to-be-measured dispersion liquid is placed in a laser particle size analyzer, the D50 particle size and the D10 particle size of the positive electrode material in the to-be-measured dispersion liquid are measured n times in sequence, the particle dispersion Y of the positive electrode material is calculated according to the D50 particle size and the D10 particle size, and n is larger than or equal to 2; wherein the calculation mode of the particle dispersion Y of the positive electrode material comprises the steps that the maximum value in the D50 particle size measured for n times is recorded as X1, the minimum value in the D10 particle size measured for n times is recorded as X2, Y = X1 / X2, and the larger the dispersion Y is, the more the particles of the positive electrode material are agglomerated; the dispersion evaluation method can solve the problem that the particle dispersion degree of the positive electrode material cannot be quantified.

The invention relates to micron-sized hexagonal flaky magnesium hydroxide with controllable particle size by using sodium hydroxide and bittern as raw materials and a preparation method thereof, belonging to the technical field of inorganic material preparation. The preparation method of the granularity-controllable micron-sized hexagonal flaky magnesium hydroxide with sodium hydroxide and bittern as raw materials comprises the following three steps: preparation of a magnesium hydroxide precursor, hydrothermal synthesis and post-treatment. According to the micron-sized hexagonal flaky magnesium hydroxide which takes sodium hydroxide and bittern as raw materials and is controllable in particle size, the particle size distribution tested by a laser particle analyzer is as follows: D10 is 0.96-1.18 mu m, D50 is 1.83-2.13 mu m, and D90 is 3.85-4.44 mu m.

The invention belongs to the field of oil production engineering, and discloses a method for analyzing the sand-carrying capacity of a chemical flooding oil well, which comprises the following steps of: on the basis of calculating the viscosity of formation fluid in different stages of a polymer flooding production well, establishing a sand production quantity model of an oil well for producing liquid with the viscosity and a critical sand-carrying particle size model under the output liquid quantity; and judging whether the oil well has sand-carrying capacity or not through sand particle size analysis, sand content calculation and sand burying time of the pump cylinder. The method has high field applicability, can predict whether the chemical flooding production well can carry sand to produce oil or not in advance in the oil reservoir deployment stage, clearly determines which sand prevention and sand carrying lifting process mode is adopted, provides theoretical guidance for oil production engineering block scheme design, and improves the oil production efficiency. And meanwhile, technical support is provided for adjustment of a single-well sand prevention and sand carrying lifting process in different production and polymer concentration stages of the converted chemical flooding production well.

The invention discloses a complex stratum dual-mode shield construction rock ballast particle size distribution evaluation method and system, and the method comprises the steps: obtaining a rock ballast image, carrying out the preprocessing and denoising, and obtaining a first image; utilizing a deep learning algorithm to identify the edge of the rock ballast, and separating overlapped rock ballast to obtain a second image; analyzing the shape of the rock ballast through morphological parameters, and performing three-dimensional reconstruction correction on the non-spherical particles to obtain a third image; performing data fusion on the third image in combination with laser particle size analysis data to obtain initial particle size distribution; aiming at a fine particle adhesion phenomenon, correcting particle size distribution by adopting a detection algorithm; dynamically updating particle size distribution according to the change of a crushing mechanism during shield mode switching; non-linear mutation in the complex stratum is analyzed through a mutation detection algorithm, and data smoothing is carried out; and finally, analyzing the error by using an error accumulation model, and if the error exceeds a threshold value, reprocessing until the error meets the requirement. According to the method, the precision and reliability of rock ballast particle size distribution evaluation are remarkably improved.

The invention relates to a particle size visualization online analysis system for a spiral sorting machine, and belongs to the technical field of spiral sorting machines. Comprising a fixing frame, a spiral groove support is fixedly arranged on the fixing frame, a stirring mechanism is arranged in the fixing frame, a spiral groove is fixedly formed in the spiral groove support, a material intercepting mechanism is arranged between the spiral groove and the stirring mechanism, and the material intercepting mechanism comprises a material intercepting opening, a discharging pipe, an external sampler and a separating assembly. The material intercepting opening is formed in an outlet in the lower end of the spiral groove, n discharging pipes are arranged at the outlet in the lower end of the material intercepting opening, particle size analysis assemblies are arranged on the discharging pipes, separation assemblies are arranged at outlets in the lower ends of the discharging pipes, and output materials of the discharging pipes are controlled to flow into an external sampler or a stirring mechanism through the separation assemblies; a conveying mechanism is arranged at the lower end of the stirring mechanism and conveys materials stirred by the stirring mechanism into the spiral groove. The problem that the experimental result is inaccurate when the sorting effect of an existing spiral sorting machine is researched is solved.

The invention discloses a composite electric field catalytic oxidation synergistic oil and gas field produced water treatment method which comprises the following steps: acquiring an electric flocculation effect generated by a corrosion-resistant titanium-based coating anode and a stainless steel cathode under optimized pulsed electric field parameters through a turbidity sensor and a particle size analyzer, and superposing low-frequency pulses in a composite pulse mode, maintaining the temperature of the reactor to be 20-40 DEG C in combination with a temperature control system to obtain initial floc particle size distribution and concentration data; the concentration state of the floc in the concentration tank is monitored by adopting a conductivity sensor according to the amount of the floc in the concentration tank treatment pollution discharge scheduling scheme, the content of remaining oil drops and suspended solids is analyzed in combination with an emulsion monitoring module, and the water quality parameter change of the concentration tank is recorded through a data analysis system, so that a final water quality treatment result is determined.

A method and a system for analyzing the particle size of fly ash are provided. The method includes performing drying treatment on the sample to ensure that the water content is lower than 0.5%; uniformly dispersing the particles by using ultrasonic wave or airflow dispersion technology; measuring the particle size by laser particle size analyzer to generate cumulative distribution curve; calculating the median particle size and specific surface area by cumulative distribution curve. The system of the disclosure has an automatic operation function, and may automatically complete sample treatment, particle size measurement, data analysis and result output. This method improves the accuracy of measurement and data processing, and is suitable for efficient analysis of a large number of samples, which has a wide industrial application prospect.

The invention discloses a small particle shape and granularity detection method based on an image. According to the method, an image device is combined with an object space telecentric lens to collect small particle images; performing target detection on the particles in the image by adopting an improved YOLOv9-CSA model to obtain a bounding box of the particles; inputting the bounding box as a prompt into the SAM2-PDA model, and generating an initial segmentation mask of the particles; for a particle aggregation scene, identifying and screening out single particle masks which are not shielded through a particle shape detection algorithm based on contour geometric features; and calculating the area and the equivalent circle diameter of the particles based on the screened masks, and finally obtaining accurate particle size distribution data such as D10, D50, D90, the average diameter and the total number of the particles. According to the method, through cooperative work of the constructed YOLOv9-CSA and SAM2-PDA and in combination with geometric feature particle screening, the precision and reliability of particle size analysis of the small particles are effectively improved, and an efficient and automatic solution is provided for industrial-grade particle size detection.

The invention provides a method for determining the ball diameter and grading of an ore grinding medium in fine grinding operation, which adopts two or more ore grinding medium ball diameter theoretical calculation methods, and comprises the following steps: calculating the theoretical ball diameter of the ore grinding medium of each size fraction of materials to be ground, and preliminarily determining the ball diameter and ball ratio of a mill by referring to the granularity composition and mass fraction of the materials to be ground; and then verifying and optimizing through an ore grinding test, and finally determining the technical scheme of reasonable initial ball loading and accurate ball supplementing and adding of the mill. The method comprises the steps of size fraction analysis and grouping of the materials to be ground, theoretical ball diameter calculation, ore grinding test verification, determination of the initial ball loading scheme of the mill and determination of the ball supplementing and adding scheme of the mill, theoretical calculation and test verification optimization are included, the implementation method is simple, the application range is wide, and the process effect is good.

The invention relates to micron-sized hexagonal flaky magnesium hydroxide with bittern as a raw material and a preparation method of the micron-sized hexagonal flaky magnesium hydroxide, and belongs to the technical field of inorganic material preparation, and the preparation method of the micron-sized hexagonal flaky magnesium hydroxide with bittern as the raw material comprises three steps of preparation of a magnesium hydroxide precursor, hydro-thermal synthesis and post-treatment. According to the micron-sized hexagonal flaky magnesium hydroxide prepared by taking the bittern as the raw material, the particle size distribution tested by a laser particle size analyzer is as follows: D10 is 0.71-0.85 mu m, D50 is 1.28-1.47 mu m, and D90 is 3.26-3.65 mu m.

The invention provides a liquid particle counting method and device based on an image sensing chip, and mainly solves the problems that in the existing oil product particle detection technology, a laser scattering automatic particle counting method is low in detection precision, and a microscope detection method is high in cost and poor in reliability. According to the scheme, a microscopic image of a liquid sample is shot by a chip end through a light source and an image sensing chip, the collected microscopic image of the liquid sample is encoded and preprocessed by a computer end, and particulate matter recognition and particle size analysis are realized through a computer vision target detection module based on deep learning. Experiments prove that the method can accurately identify particles and effectively remove interferents such as bubbles and water drops, the measurement precision is improved by about 25%, and the particle detection range is expanded to 0.4-1000 microns. According to the overall design, collaboration and unification of miniaturization, high precision, high efficiency and low cost are achieved, and a new technical path is provided for real-time monitoring and field application of oil product particles.

The invention provides a test method and an evaluation method for the granulation degree of graphite particles, and relates to the technical field of material performance detection. The testing method comprises the following steps: (1) performing earlier stage treatment on aggregate to obtain single-particle aggregate, and performing granulation treatment on the single-particle aggregate to obtain granulated materials which comprise primary particles and secondary particles; (2) respectively testing the single-particle aggregate and the granulation material by adopting a particle size analyzer to obtain the particle size change rate B of the material before and after the granulation of the particle size Dv50 of the single-particle aggregate and after the granulation of the particle size Dv50 of the granulation material; counting the number of primary particles and the number of secondary particles in the granulation material by adopting a scanning electron microscope to obtain the number of the primary particles and the number of the secondary particles, and calculating the proportion A of the secondary particles; a dynamic particle size and particle shape analyzer is adopted to test the particle shape of the granulation material to obtain the convexity C and the length-width ratio F; and (3) calculating the granulation degree Gd value, wherein Gd = A * B * C / F. The test method is simple, and the granulation effect can be quantitatively evaluated.

The invention discloses a method for accurately measuring the content of elements in fine mineral powder, and relates to the technical field of fine mineral powder separation and determination, and the method comprises the following steps: S1, Thai sieve classification and production control final analysis; s2, ultrasonic sedimentation and micro powder pre-domestication; s3, carrying out double-sample separate test and conditional detection; s4, carrying out dense time measurement and particle fraction separation; and S5, precipitating a combined wall-particle size assembly. According to the method, the minerals exist in a more appropriate particle state by optimizing field operation, and the grading effect is enhanced, so that the recovery effect of useful minerals is improved, the loss in tailings is reduced, and the problem of determining the content of particles with different sizes and the content of elements in the separation and detection of the micro-fine-particle-grade minerals is solved.

The utility model relates to a laser particle size analyzer, aims to solve the problems of large focusing difficulty, long time consumption, low accuracy and the like of the laser particle size analyzer, and provides a laser particle size analyzer capable of quickly focusing, which comprises a laser emitting system and a laser receiving system which are connected to two ends of a flue gas pipeline, the laser receiving system comprises a laser receiving cavity, a lens group and a scattering centering device which are coaxially arranged; the scattering centering device is arranged in the laser receiving cavity and close to the focal point of the lens group; the scattering centering device comprises a centering mounting disc, a laser receiver and a plurality of photodiodes; an adjusting groove is formed in the outer side wall of the centering installation disc in the radial direction. A sliding groove is formed in the outer wall of the laser receiving cavity in the axial direction of the laser receiving cavity, the plane of the focal point of the lens set is located in the covering plane of the sliding groove, the sliding groove and the adjusting groove are connected through an adjusting screw, and the centering position of the centering installation disc is adjusted by changing the position of the adjusting screw on the sliding groove, so that the laser receiver on the centering installation disc coincides with the focal point of the lens set.