13 results about "Sieve analysis" patented technology

To provide a granular body which, when used as a material for a ground-improving material, can impart self-healing performance to a hardened product of the ground-improving material and can maintain the self-healing performance imparted to the hardened product of the ground-improving material over a long period of time.SOLUTION: A granular body according to the present invention comprises resin and an ion-releasing compound capable of releasing a cation or an anion, and in a test conducted in accordance with JIS A 1102:2014 "Test method for sieve analysis of aggregates", 85 mass% or more of the granular body remains on a 5-mm sieve.SELECTED DRAWING: Figure 1

Arrangement for the rehabilitation of an existing road (1) comprising: - a means (2) for carrying out a sieve analysis of a sample of the existing road, - a spreader (3) for applying cement to the existing road, - a milling machine (4) which mills at least parts of a surface (11) of the existing road (1), while simultaneously incorporating the cement and introducing a water-polymer mixture, so that a lean concrete is formed, - a roller (6) for hardening the lean concrete.

The utility model provides a tool for cement negative pressure sieve analysis appearance fineness test, including the clamping device for fixed sieve cover and knock the knocking device of sieve cover, the knocking device includes the casing with containing space, is equipped with the knocking piece in the casing, the knocking piece includes the hammer rod through below casing, sets up the pressure head of hammer rod top and stretches into containing space, sets up the hammer head of hammer rod below, and the spring of the hammer rod is sleeved between the pressure head and the casing, still include setting up the motor of casing top and the rotation axis stretches into containing space, sets up the pressure rod of motor rotation axis top for pressing pressure head drop, when using, the space surrounded by the tool's supporting leg is covered in the top of sieve cover, then starts the motor, the pressure rod does the rotation movement in containing space, repeatedly presses the downward movement of pressure head, drives the hammer head repeatedly to knock the sieve cover upper surface, to replace the staff realizes the purpose of sieve cover knock.

A tooth whitening chewing gum composition is disclosed that includes a combination of polyphosphates that enhances tooth whitening benefits with a minimal salty taste profile. In one embodiment, the tooth whitening chewing gum composition includes a gum base, a bulk sweetener, and about 0.5% to about 12% by weight, based on the total weight of the composition, of an alkali or alkaline earth metal pyrophosphate, an alkali or alkaline earth metal hexametaphosphate, or a combination thereof, wherein the alkali or alkaline earth metal pyrophosphate has a particle size, as determined using sieve analysis, such that less than 50% of the particles pass through a 25 mesh (707 micron) screen, and the alkali or alkaline earth metal hexametaphosphate has a particle size, as determined using sieve analysis, such that less than 50% of the particles pass through a 140 mesh (105 micron) screen.

To provide a slurry composition containing terephthalic acid and 1,4-butanediol, wherein precipitation of terephthalic acid in the slurry composition is suppressed and a method for producing the slurry composition; and a method for producing polybutylene terephthalate with excellent reactivity in esterification reactions using this slurry composition.SOLUTION: There is provided a slurry composition containing terephthalic acid and 1,4-butanediol, wherein the terephthalic acid has a BET specific surface area of 1,500 cm2 / g or more, as measured by the krypton adsorption method, and is in the form of particles having a mean particle size D50 of 40 μm or more and 200 μm or less, determined by sieve analysis according to ASTM D1921-06 and calculated according to ISO 9276-2:2014. There is also provided a method for producing polybutylene terephthalate using this slurry composition.SELECTED DRAWING: None

The application discloses a precise grinding and dressing method of minerals and belongs to the technical field of mineral dressing process and mineralogy. The method is characterized in that the mineral parameters of each sieve analysis particle size of a broken sample are finely analyzed, and a quantitative relationship is established between the mineral parameters and concentrate indexes of each particle size, so that the key of 'grinding on demand' and 'precise recovery' is accurately deciphered. Through the dynamic linkage of the fine classification of particle size, the mineral parameters and the grade of the target element in the concentrate, the three major pain points of 'high energy consumption, serious over-grinding and large fluctuation of concentrate quality' in the traditional grinding process are solved, and the application provides an intelligent, self-adaptive and high-benefit precise grinding and dressing solution for the mineral dressing industry.

The utility model relates to the technical field of cement production and quality control, and discloses an environment-friendly cement fineness negative pressure screen analysis device which comprises a body, a screen seat is arranged in the body, the inner wall of the screen seat is slidably connected with a negative pressure screen, and the top end of the negative pressure screen is slidably sleeved with a screen cover. According to the environment-friendly cement fineness negative-pressure screen analysis device, by arranging a weighing device and a display screen, a screen analysis operation result can be directly measured and displayed, an electric telescopic rod drives a pressing ring to ascend and descend, a negative-pressure screen can be pressed tightly, by arranging a rotating plate, the negative-pressure screen is prevented from being blocked, and by arranging a cleaning brush and a water outlet ring, the cleaning efficiency is improved. The negative-pressure sieve can be automatically cleaned, the effects that the sieve analysis result can be automatically measured and calculated, manpower is saved, airflow distribution can be optimized, the negative-pressure sieve is prevented from being blocked, meanwhile, the negative-pressure sieve can be conveniently cleaned are achieved, and the problems that an existing negative-pressure sieve analysis device is uneven in airflow distribution, a sieve net is prone to being blocked, automation is low, and cleaning of the negative-pressure sieve is strenuous are solved.

The invention relates to a detection device and a detection method for detecting the fineness of cement by using a screen analysis method.The detection device is provided with a lifting screen seat mechanism, a movable grabbing mechanism, a weighing sliding mechanism, a negative pressure screen seat mechanism, a sliding table cover plate mechanism, a recycling mechanism and an electrical control system, and the lifting screen seat mechanism is used for placing a screen to drive the screen to move; the movable grabbing mechanism is used for grabbing a screen mesh, transferring the screen mesh from the lifting screen seat mechanism to the weighing sliding mechanism, weighing a test sample on the screen mesh and recording data, the negative pressure screen seat mechanism is used for placing the screen mesh, forming a negative pressure cavity with a cover plate in the sliding table cover plate mechanism, transferring the screen mesh meeting the weight requirement to the negative pressure cavity, and transferring the screen mesh to the weighing sliding mechanism. After screen analysis treatment, the screen is transferred to the weight meter again to be weighed, data measured by the weight meter twice are input into the system and calculated, and the percentage of screen residues is directly obtained, so that automatic detection is achieved, the detection efficiency can be effectively improved, meanwhile, the measurement result is guaranteed, and the use experience is improved.

The invention discloses a precise grinding and selecting method for minerals, and belongs to the technical field of mineral processing mineralogy. According to the method, mineral parameters of each screen fraction of a crushed sample are subjected to refined analysis, a quantitative relation is established between the mineral parameters and concentrate indexes of each fraction, and the key points of'on-demand ore grinding 'and'accurate recovery' are accurately decoded. According to the technology, through size fraction fine classification and dynamic linkage of mineral parameters and the grade of target elements in concentrate, the three major pain points of high energy consumption, serious over-grinding and large concentrate quality fluctuation in a traditional ore grinding process are solved, and an intelligent, self-adaptive and high-benefit accurate grinding and selecting solution is provided for the ore dressing industry.

A composite anchor cartridge (1) comprising (i) a first container (2) with a first interior space (3) containing a reactive resin (6) with ethylene unsaturated groups; and (ii) a second container (4) with a second interior space (5) containing a particulate hardener (7); wherein the first container (2) is made of glass and is completely sealed; wherein the first container (2) is elongated and the maximum length of the first container (2) is at least 5 times longer than the maximum width of the first container (2) perpendicular to it; wherein the first container (2) has a circular cross-section along its longitudinal extent, the diameter of this circular cross-section being constant over at least 80% of the longitudinal extent of the first container (2); wherein the second container (4) is made of glass and is completely sealed;wherein the second container (4) is elongated and the maximum length of the second container (4) is at least 15 times longer than the maximum width of the second container (4) perpendicular to it; wherein the second container (4) has a circular cross-section along its longitudinal extent, the diameter of this circular cross-section being constant over at least 80% of the longitudinal extent of the second container (4); wherein the second container (4) is arranged in the first interior space (3) and wherein the first interior space (3) contains the reactive resin (6) outside the second container (4); wherein the first interior space (3) contains a particulate filler in addition to the reactive resin (6) and the second container (4); wherein the mean particle size of the filler is larger than the mean particle size of the hardener (7), each expressed as a particle size distribution with a D50 value, the D50 value being determined by sieve analysis as dry sieving according to DIN 66165;wherein the first interior space (3) has a length L1 and the second interior space (5) has a length L2, wherein L2 ≥ 0.72·L1 and L2 ≤ 0.95·L1; wherein in a vertical arrangement of the first container (2) the first interior space (3) is filled with the reactive resin (6) and the particulate filler up to a fill level F1, wherein F1 ≥ 0.64·L1 and F1 ≤ 0.95·L1; wherein the reactive resin (6) is liquid at 23°C; and wherein the hardener (7) comprises dibenzoyl peroxide phlegmatized with ethylene glycol dibenzoate, and wherein the dibenzoyl peroxide content is less than 50.0 wt% based on the total weight of the hardener (7).

The invention discloses a sediment particle size analysis screen analysis method and device, electronic equipment and a storage medium. The method comprises the following steps: determining a first particle size of first sieved powder; determining at least one screen size according to the first particle size, and determining at least one first mass; performing vibration screening on the first screened powder according to a screen mesh, and weighing to obtain second mass; a first mass fraction is determined from the at least one first mass and the second mass. According to the method, the screen is selected according to the first particle size, the first screened powder is weighed according to the selected screen, and the mass fractions of the particles with different particle sizes in the sediment are determined according to the obtained mass, so that automatic weighing can be realized, and meanwhile, due to direct weighing, the particles do not need to be replaced by a weighing tray, and the weighing efficiency is improved. The problem of particle loss generated in the weighing process is avoided, and accurate data basis and higher test efficiency are provided for content analysis of sediments while the accuracy of quality acquisition is improved.

To provide a composition comprising terephthalic acid and 1,4-butanediol that can suppress foaming in an esterification reaction vessel and can perform an esterification reaction with superior reactivity in producing polybutylene terephthalate by esterification using the composition, and a method for producing polybutylene terephthalate using the composition.SOLUTION: There is provided a composition comprising terephthalic acid and 1,4-butanediol, wherein the terephthalic acid is in a particle form having a BET specific surface area, measured by a krypton adsorption method, of 1,000 cm2 / g or more and 3,500 cm2 / g or less, and an average particle diameter D50, determined by sieve analysis in accordance with ASTM D1921-06 and calculated in accordance with ISO 9276-2:2014, of 30 μm or more and 300 μm or less. There is also provided a method for producing polybutylene terephthalate using the composition.SELECTED DRAWING: None

This invention provides a method for investigating flotation processes, relating to the field of flotation technology. The method includes: a gas phase investigation step: acquiring and comparing data on air dispersion, bubble size distribution characteristics, and gas holdup inside the flotation machine; a solid phase investigation step: sampling from horizontal sections at different depths of the slurry phase to obtain data on the bubble loading level in the slurry phase, and sampling from different depths of the slurry phase to obtain data on the distribution of solid particles in the liquid phase of the slurry phase, comparing the loading level data and the distribution data; and a flotation cell product investigation step: using a sampler to sample the flotation machine and the foam and underflow at each stage of the entire flotation process, screening and analyzing the samples, and comparing them with the loading level data. This method allows for a more systematic and comprehensive analysis of the investigation data, which is of great significance for optimizing the beneficiation plant process and equipment operating parameters.