18results about How to "Improved particle size distribution" patented technology

This invention belongs to the field of industrial solid waste resource utilization technology, and relates to a circulating fluidized bed ash-based cementitious material for road base courses and its preparation method. The raw materials for the road base course cementitious material are composed of the following mass parts: 29-43 parts of circulating fluidized bed ash, 16-27 parts of ground blast furnace slag, 3-6 parts of silica fume, 7-15 parts of P.O42.5 silicate cement, 0.1-0.4 parts of activator, and 27-30 parts of water. The circulating fluidized bed ash is prepared by mixing circulating fluidized bed fly ash and slag in a mass ratio of (2-5):(5-10). This invention effectively alleviates the problems of fast setting time and shrinkage cracking of traditional road base course cementitious materials by utilizing the characteristics of micro-expansion and long hydration time of circulating fluidized bed ash. The advantage of this invention is that it promotes the large-scale utilization of circulating fluidized bed ash and contributes to carbon emission reduction in the road sector.

This invention discloses an integrated molding method for metallic chromium powder and additives, comprising: crushing chromite ore and mixing it with aluminum powder, adding additives, mixing and pressing the mixture into a compact, and then feeding it into an electric arc furnace for an electrothermal reaction; after the reaction, separating the slag and metallic chromium; crushing the prepared metallic chromium, adding a binder to the crushed metallic chromium powder, mixing, and then performing high-temperature sintering treatment to obtain high-temperature sintered metallic chromium powder, which is then cleaned and dried; pressing the dried metallic chromium powder into blocks to obtain the finished metallic chromium product. This invention addresses the issue of high carbon content in existing electrothermal methods for preparing metallic chromium by adding chromium trioxide, tin powder, or highly active tin powder to chromite ore. The reaction of chromium trioxide with carbon removes impurities, while the reaction of tin powder with sulfur generates volatile tin sulfide, thereby removing sulfur impurities from the metallic chromium and improving the purity of the finished metallic chromium product.

The invention discloses a zero-dimensional indium-based organic-inorganic hybrid perovskite material and a synthesis method thereof, and belongs to the technical field of photoelectric materials, the perovskite material has a general formula, R is one or more organic cations selected from methylamine, formamidine and cesium, and X is one or more halide ions selected from methylamine, formamidine and cesium; the invention further discloses a synthesis method of the material, the synthesis method comprises the steps of precursor solution preparation, coordination regulation and control, solvothermal reaction, product separation, surface modification, purification and drying, and the crystal structure and the surface chemical environment are precisely regulated and controlled through the synergistic effect of coordination regulation and surface passivation. The photoluminescence quantum yield of the material reaches 82% or above, and the material has excellent luminescence performance in a solution state, has ultrahigh environmental, water and thermal stability, and is lead-free, non-toxic and environment-friendly; the material can be widely applied to the photoelectric fields of light emitting diodes, X-ray scintillators, photocatalysis and the like, and the device performance is excellent.

The application discloses a kind of high-concentration amino acid surfactant transparent concentrate stabilization method, comprising the following steps: step one, raw material precision weighing and pretreatment, step two, first low-temperature assisted dispersion, step three, second step gradient temperature control dissolving, step four, three-dimensional synergistic stabilization treatment, step five, gradient pH precision control, step six, low-temperature homogenization curing, step seven, product filtration and detection;The application constructs the stabilization method of step-by-step gradient temperature control dissolving and three-dimensional synergistic stabilization system, different from the prior art one-step mixing, single thickening stabilization, by batch feeding, gradient temperature control dissolving, avoid high-concentration amino acid surfactant due to local concentration too high, temperature sudden change leads to molecular aggregation crystallization, from source inhibit turbidity and phase separation.

This invention discloses a high-compact, high-capacity lithium iron phosphate cathode material and its preparation method. Using iron phosphate and iron hydroxide as a mixed iron source, a two-step synthesis method is employed. First, the two raw materials are ground to one large particle size and one small particle size. The large particle size is sintered at two different temperatures to prepare large and medium particles, while the small particle size is sintered at two different temperatures to prepare small and ultra-small particles. Then, the large and medium particles are mixed and ground to a large particle size, and the small and ultra-small particles are mixed and ground to a small particle size. The mixing of large and small particle sizes increases the particle size distribution, and sintering yields the high-compact, high-capacity lithium iron phosphate cathode material. The mixing and grinding of multiple particles in this invention further increases the particle size distribution and improves the compaction density of the cathode material. The use of a low-molecular-weight carbon source in the first sintering stage is beneficial for particle coating and improves particle roundness. The use of a high-molecular-weight carbon source in the second sintering stage constructs a continuous conductive network, ensuring the material's capacity is fully realized.

This invention discloses a gradient self-excited low-carbon cement and its preparation method, comprising the following raw materials in parts by weight: 15-20 parts of early-age self-excited cementitious material with a particle size of 0.1-10 μm and a specific surface area of ​​1150-1250 m². 2 / kg, uniformity coefficient >1.1; 45-50 parts of middle-aged self-stimulating cementitious material, particle specific surface area 380-400m² 2 / kg, uniformity coefficient > 1.1, R 45μm Silica residue <5%; 20-25 parts of long-term self-activating cementitious material, particle specific surface area 480-550 m² 2 / kg, uniformity coefficient > 1.1, R 45μm Residue on sieve <2%; 10-15 parts of rheology-active material, particle specific surface area 240-300 m² 2 / kg, uniformity coefficient > 0.9, R 45μm The residue on the sieve is less than 40%. This invention achieves a gradient self-excitation effect from early age to long age, ensuring the mechanical properties of low-carbon cement throughout its entire service life.

The invention relates to a controlled-release linalool emulsion based on a ternary system as well as a preparation method and application of the controlled-release linalool emulsion. The linalool emulsion is an oil-in-water Pickering emulsion composed of a water phase and an oil phase, the water phase comprises a ternary system composed of soybean protein isolate, pectin and hydroxypropyl methyl cellulose, and the oil phase is linalool essential oil. The preparation method comprises the following steps: respectively preparing soybean protein isolate, pectin and hydroxypropyl methyl cellulose solutions, and mixing to obtain a ternary composite water phase; and mixing the ternary composite water phase with the oil phase, and carrying out high-pressure homogenization treatment and ultrasonic treatment under a low-temperature condition to obtain the controlled-release linalool emulsion based on the ternary system. Compared with the prior art, the linalool essential oil emulsion embedding method solves the problem that linalool is easy to volatilize, and can be used in the fields of fruit and vegetable fresh keeping, tea fragrance maintaining and the like.

The application relates to a full-solid-waste high-activity composite admixture and a preparation method thereof, raw materials of the full-solid-waste high-activity composite admixture comprising: mixed-milling micro-powder of steel slag tailings and refining slag, and slag micro-powder; wherein the content of the mixed-milling micro-powder is 20-30 parts by weight, and the content of the slag micro-powder is 70-80 parts by weight. Through the synergistic effect of the raw material re-mixing, the activity of the admixture is improved, the stability of the chemical performance index of the admixture is ensured, the use proportion of the admixture in cement and mortar is improved, the consumption of cement is saved, and then the cost is reduced. The metallurgical industrial solid waste such as steel slag tailings, refining slag, blast furnace slag and the like is realized to be resourcefully utilized, and the problem that long-term stacking occupies land and cannot be absorbed is solved.

The invention relates to the technical field of preparation processes of battery-grade lithium carbonate, and discloses a preparation system of battery-grade lithium carbonate and a preparation method of the battery-grade lithium carbonate. Comprising a pulping tank, a homogenizing pump, a first reactor, a carbonization buffer tank, a first circulating pump, a filter, an ion exchange device, a delivery pump, a second reactor, a slurry buffer tank, a second circulating pump and post-treatment equipment which are sequentially connected through a main pipeline, the first proportioning valve is connected with the pulping tank through a first return pipeline, a second proportioning valve is arranged between the first circulating pump and the filter, the second proportioning valve is connected with the first reactor through a second return pipeline, and a third proportioning valve is arranged between the second circulating pump and the post-treatment equipment; and the third proportioning valve is connected with the second reactor through a third reflux pipeline. The preparation process is simplified, the use cost is reduced, and the preparation efficiency is improved.

The application discloses an oxygen-enhanced pH-responsive magnetic targeting photosensitizer delivery system, which is recorded as Fe3O4@mSiO2@MnO2@PS@PEG-b-PAsp, and the delivery system takes the superparamagnetic Fe3O4 core as a magnetic targeting matrix, is covered with mesoporous silica outside, and is crosslinked with polyethylene glycol-polyaspartic acid after being modified by amino on the surface of the mesoporous silica, so that the loading of the photosensitizer is realized. The oxygen-enhanced pH-responsive magnetic targeting photosensitizer delivery system provided by the application realizes the magnetic targeting property and the pH responsiveness, and realizes the effect of increasing the concentration of intracellular reactive oxygen species.

The utility model discloses a recycled asphalt concrete paving device, and relates to the technical field of asphalt concrete paving, the recycled asphalt concrete paving device comprises a first motor, a crushing mechanism is arranged on the outer wall of the first motor, and a feeding pipe is fixedly connected to the top of the crushing mechanism. At the moment, a first motor can be started firstly, then a first rotating shaft drives a first gear on the surface to rotate clockwise, then the first gear drives a first gear beside the first gear to rotate anticlockwise, and meanwhile the first rotating shaft rotates to drive a first belt wheel on the surface to rotate; then, a first belt wheel drives a first belt on the inner wall to conduct transmission and drives a second rotating shaft to rotate, then, the second rotating shaft drives a second gear to rotate clockwise, then, the second gear drives a second gear on the side to rotate anticlockwise, and then asphalt concrete is poured into a feeding pipe; afterwards, the asphalt concrete is conveyed into the center points of the first crushing wheels on the two sides through the limiting plates.

This invention relates to the field of non-metallic mine backfilling technology, and particularly to a potash mine solid-liquid tailings-based backfill material and its preparation method. The preparation method of the backfill material includes: mixing potassium phosphate with tailings to obtain a phosphate brine solution; dry mixing composition 1 of a composite binder with the tailings to obtain a uniform dry material; adding the phosphate brine solution to obtain a uniform slurry 1; adding a mineral carrier-loaded slow-release alkali source to the uniform slurry 1 to obtain a uniform slurry 2; first adding a polycarboxylate superplasticizer to the uniform slurry 2 and mixing, then adding an associative thickener solution and mixing, and finally adding anionic polyacrylamide to obtain the backfill material. The backfill material prepared by this invention achieves a coordinated balance between slurry fluidity, anti-segregation, pumpability, and backfill strength, providing an economical, environmentally friendly, and efficient technical solution for backfilling non-metallic mine goaf areas.

This invention, entitled "A Camellia Seed Oil Microcapsule Emulsion and Its Preparation Method and Application," belongs to the field of cosmetic technology. The technical problem it aims to solve is the deficiency in existing technologies where camellia seed oil is prone to rancidity, leading to reduced stability and bioavailability of formulations. This invention provides a camellia seed oil microcapsule emulsion system that can slow down the rancidity process, thus achieving a transition from oil-soluble to water-soluble camellia seed oil. The key technical solution is a camellia seed oil microcapsule emulsion, the raw materials of which consist of camellia seed oil, sodium caseinate, chitosan hydrochloride, PE9010, and a solvent.

The application discloses a vertical roller mill and a machine-made sand production system, and relates to grinding equipment technology. The roller mill comprises a grinding part, wherein a grinding disc and a grinding roller constitute part of the grinding part. The roller mill comprises a pre-milling part and an adaptive material blocking adjusting part. The pre-milling part is composed of a feeding center shaft and milling units, and the feeding center shaft is located above the grinding disc. The N milling units are uniformly distributed around the feeding center shaft, and the pre-milling part of the milling units is in contact with the grinding end face of the grinding disc. The adaptive material blocking adjusting part comprises a rocker seal frame, a material blocking device and a linkage assembly. The rocker seal frame serves as a grinding roller support and is installed on the roller mill rack. The material blocking device comprises a fixed material blocking device and a sliding material blocking device combined with the fixed material blocking device through vertical movement, and the two devices jointly form a surrounding blocking structure. The linkage assembly connects the rocker seal frame and the sliding material blocking device, so that the rocker seal frame drives the sliding material blocking device to move upwards through the linkage assembly. Through the technical innovations, the performance of the vertical roller mill is comprehensively improved.

This utility model relates to a novel grinding disc-assisted grinding device for a sand mill, comprising a frame, a variable frequency motor fixedly installed inside the frame, a bearing seat fixedly installed above the frame, a drive shaft mounted on the bearing seat, the variable frequency motor and the drive shaft connected by a drive belt device, a grinding cylinder fixedly mounted on the bearing seat by grinding cylinder fixing bolts, and an end cap fixedly mounted on the other end of the grinding cylinder by end cap fixing bolts. The bearing seat, grinding cylinder and end cap form a sealed grinding chamber, in which a grinding disc, a conical spacer and a rotor are arranged. The conical spacer is a spacer with a tapered structure. The grinding disc and the conical spacer are mounted on the drive shaft, and the rotor is mounted at the farthest end of the drive shaft. The stirring device composed of the grinding disc, the conical spacer and the rotor rotates with the drive shaft. This utility model solves the problems of traditional cylindrical spacers not being able to fully utilize the grinding chamber space and having low grinding efficiency, and square spacers having high energy consumption and relatively insufficient uniform mixing ability.

The application discloses a kind of carbon dioxide geological storage well cementing anticorrosion additive and application.The anticorrosion additive includes the following weight parts of each component: 40~50 parts of rice hull ash, 30~50 parts of alkali-soluble acrylic resin powder, 10~30 parts of silica ash and 5~15 parts of fiber.The anticorrosion additive can significantly reduce the chemical corrosion effect of carbon dioxide on the cement stone and the stress corrosion effect under the coupling condition of stress by densification, alkali reduction, toughening and other comprehensive effects, can effectively improve the anticorrosion ability of carbon dioxide geological storage well cementing cement sheath, ensure the integrity of wellbore sealing.

This utility model discloses a spray mechanism for a spray drying tower, relating to the field of spray drying tower technology. The spray mechanism includes a motor and a centrifugal disc connected to the motor's output end. It also includes a flow guiding device vertically positioned in the center of the centrifugal disc. The flow guiding device has a first through-hole vertically formed inside and multiple second through-holes formed on its outer side, all of which communicate with the first through-hole. A liquid inlet pipe is connected to the lower end of the first through-hole. Multiple circular holes are formed on the outer surface of the centrifugal disc. By adding a flow guiding device and forming a first and multiple second through-holes inside it, along with an arc-shaped flow guide groove design, this utility model achieves uniform distribution of the liquid to be atomized, significantly improving the droplet size distribution during atomization, resulting in more uniform atomization and improved drying efficiency.

The invention relates to a modified medium-nickel ternary positive electrode material and a preparation method and application thereof. The preparation method comprises the following steps: S1, mixing a precursor with a lithium salt, an aluminum-containing dopant and a magnesium-containing dopant, and performing first sintering to obtain a base material; and S2, uniformly mixing the matrix material obtained by the first sintering with a coating agent, carrying out spray drying, and then carrying out second sintering to obtain the modified medium-nickel ternary positive electrode material, the coating agent at least comprises WO3 and accounts for 8-10% of the mass of the base material. By introducing a special coating agent tungsten oxide, a stable tungstate interface layer is formed on the surface of the positive electrode material, the interface stability of the positive electrode material under high voltage is remarkably enhanced, and the integrity of the crystal structure of the material is improved by doping aluminum and magnesium elements in the dopant; and meanwhile, precursor powder with a coating agent distributed highly uniformly is obtained by adopting a spray drying means, and a complete and uniform composite coating layer is finally formed, so that the electrochemical performance of the material is remarkably improved.