92 results about "Composite pellet" patented technology

The invention relates to the technical field of comprehensive utilization of solid wastes, and discloses a preparation method of a high-performance cement-based grouting anti-seepage slope-fixing material based on waste slag, which comprises the following steps: obtaining carbide slag and desulfurized gypsum, mixing and grinding to obtain a superfine low-hardness composite activator; independently grinding the granulated blast-furnace slag to obtain hard superfine slag powder; putting the superfine slag powder and the composite exciting agent into high-speed powder modification equipment according to a specific proportion, and driving the composite exciting agent to plastically deform and mechanically embedded into surface defects of the superfine slag powder by utilizing impact kinetic energy provided by linear speed and Mohs hardness difference of the superfine slag powder and the composite exciting agent, so as to form core-shell structure composite particles with mechanical interlocking interfaces; according to the invention, by constructing a mechanical chimeric core-shell structure, space-time decoupling of high rheological property in a slurry construction period and high strength in a hardening period is realized.

Herein is described a composite material, the composite material comprising composite 5 particles comprising particles of a mesoporous carbon support material having dispersed on their surfaces noble metal nanoparticles and / or noble metal-M alloy nanoparticles and optionally particles of the elemental metal M or metal oxide MOy, wherein y is >0 to a stoichiometric value of the metal oxide, wherein M is a less noble metal than the noble metal, wherein the composite particles have a BJH average pore diameter of from 2 to 0 50 nm and a particle size D90, as measured by laser diffraction and volume distribution, of 10 µm or less.

Animal litter comprising composite particles formed from renewable components where the composite particles include starch and dextrin agglomerated together. The dextrin may be included in an amount of from about 10% to about 50% by weight of the composite particles and the starch may be included in an amount of from about 50% to about 90% by weight of the composite particles. The composite particles may optionally include powdered activated carbon. The litter may advantageously be free or substantially free of non-renewable mineral components, and may exhibit a clump retention of at least about 90% and / or a clump strength of at least 1,000 gf.

The present invention relates to silicon and carbon-based composite particles wherein each silicon-based composite particle consists of a bulk material having a plurality of nanoscale silicon domains embedded therein, and wherein 5 based on the total mass of the silicon-based composite particle, the bulk material comprises a total amount of 1 to 40 wt% carbon, the remainder being silicon and unintentional impurities, and wherein the silicon and carbon-based composite particles have a median volume-weighted diameter D50 in the range of 1 to 9 m and a volume-weighted diameter ratio D90 / D10 in the range of 1 to 6 as determined by laser diffraction analysis according to standard ISO 10 133 20: 2020.

This invention belongs to the field of metal powder preparation technology, and discloses a porous nickel powder, its preparation method, and its applications. The method includes: preparing nickel oxalate powder as a precursor; forming a nickel coating layer on the surface of the nickel oxalate powder by chemical plating to obtain nickel oxalate@nickel core-shell structured composite particles; subjecting the composite particles to pyrolysis annealing treatment, causing the internal nickel oxalate to decompose and generate gas, and the external nickel coating layer to transform into a porous metal framework, thereby obtaining porous nickel powder. This method is simple, low-cost, and produces nickel powder particles with uniform size, stable pore structure, good connectivity, and large specific surface area, making it suitable as a precursor for electrocatalytic active materials or porous electrode materials.

The present invention relates to particulate silicon and carbon-based composite particles wherein the particles have a median volume weighted diameter D50 of 0.05 to 10 m, comprising bulk agglomerates having a total amount of Si of 60 to 95 at% and a total content of C of 5 to 540 at%, and wherein the bulk mass further comprises one or more internal shell-like spatial regions having an increased carbon content wherein the elemental ratio of carbon to silicon has a peak in the range of 1 to 15 atomic percentage higher than the average elemental ratio of the bulk material.

This invention discloses a composite pellet binder containing red mud and its application, belonging to the technical field of binders for metallurgical pelleting. The binder uses red mud, a waste residue from the alumina industry, as the main raw material, combined with functional additives. By mass percentage, red mud accounts for 73%~87%, with the remainder being functional additives. This invention, through multi-component synergistic formulation, solves the industry pain points of poor compatibility with strong alkalinity and insufficient self-binding performance of red mud. The prepared binder can directly replace bentonite used in pelleting, exhibiting superior pelletizing performance at the same addition amount. Simultaneously, it can increase the iron content of pellets by 0.248~0.62 percentage points, reduce ironmaking waste emissions, and possess significant environmental and economic benefits. It is compatible with existing pelleting production processes, requires no new equipment, and is easy to industrialize.

The utility model relates to the technical field of quantitative feeding, and discloses a quantitative feeding device for processing a composite particle conditioner, which comprises a feeding hopper mounted at the upper end of a mixing tank body, a transparent pipe is fixedly connected to the inner wall of the upper end of the feeding hopper, an extension cavity is formed in the upper end of the transparent pipe, and a plurality of feeding cavities are formed in the bottom surface of the extension cavity in a penetrating manner; a cross-shaped support is fixedly connected to the inner wall of the upper end of the extension cavity, a lifting mechanism is connected to the middle of the cross-shaped support, discharging assemblies are connected to the four ends of the cross-shaped support, and a steering mechanism is connected to one end of the cross-shaped support. According to the quantitative feeding device for processing the composite particle conditioner, multiple raw materials blocked by the discharging assembly can be selectively released according to the discharging requirement of the needed raw materials, and therefore quantitative adding is achieved; the discharging assembly can be automatically controlled to descend, so that discharging is achieved; the lifting mechanism can be controlled to rotate through the steering mechanism, and then a certain discharging assembly can be independently controlled to ascend and descend through the lifting mechanism.

The present invention discloses a method for manufacturing insert plates for the central trough of a scraper conveyor with an open top, comprising the following steps: S1, using resin material, reinforcing material, and silicon carbide micro powder as raw materials for preparing the insert plate, wherein the mass proportions of the resin material, reinforcing material, and silicon carbide micro powder decrease sequentially; S2, drying the resin material and reinforcing material, and modifying the silicon carbide micro powder to form modified silicon carbide; S3, mixing the modified silicon carbide, resin material, and reinforcing material after processing to form composite particles; S4, adding the composite particles to an insert plate mold, heating, and molding into an insert plate. Therefore, the method for manufacturing insert plates for the central trough of a scraper conveyor with an open top according to the present invention ensures the full curing and performance of the material, and allows for direct replacement of metal insert plates without modifying the main body of the equipment.

The present application relates to the technical field of steelmaking auxiliary materials, in particular to a method for improving the balling rate of molybdenum oxide composite briquetting, in which process, in order to control the material temperature and overcome the problem of reaction heat release in the material, raw dolomite or limestone particles which are not easy to react with water are used to replace the traditional inhibitor lime, and the chemical reaction heat production is effectively controlled; the briquetting process provided by the present application adjusts the conventional one-time stirring and mixing to twice stirring, dry ice is added for cooling during the stirring process, and each time after stirring, standing is carried out, and through the above measures, the problem of material heating caused by the heat generated by material stirring and chemical reaction and then causing the problem of cracked briquetting after briquetting can be effectively solved. The balling rate of the molybdenum oxide composite briquetting for steelmaking produced by the process reaches more than 90%, the breaking strength is greater than 600N, and the falling strength is more than 15 times / (0.5m).

This invention discloses a chromium oxide-based coating, its preparation method, and its application. The preparation method of the chromium oxide-based coating of this invention includes the following steps: 1) dispersing ceramic particles and / or metal particles, chromium oxide particles, and a binder in water, wherein the particle size of the ceramic and metal particles is smaller than that of the chromium oxide particles, followed by spray drying to obtain composite particles; 2) thermally spraying the composite particles onto the surface of a substrate to obtain the chromium oxide-based coating. The chromium oxide-based coating of this invention possesses both high hardness and excellent toughness, exhibiting superior resistance to friction and wear, and can be used as a wear-resistant coating for the surface of metal parts, making it suitable for large-scale industrial applications.

The invention belongs to the technical field of metallurgical binders, and particularly relates to a Bayer process red mud-based composite pellet binder, a preparation method thereof and iron ore pellets. The invention relates to a water-based adsorbent, which is prepared from the following components in percentage by mass: 60 to 80 percent of Bayer process red mud subjected to microwave-ultrasonic wave synergistic activation treatment, 10 to 25 percent of superfine slag powder, 2 to 8 percent of nano SiO2 and 1 to 5 percent of mixture of sodium lignin sulfonate and ammonium formate, the parameters of the microwave-ultrasonic wave synergistic activating treatment are as follows: the microwave power is 600 to 1000W, the ultrasonic wave frequency is 30 to 50kHz, and the treatment time is 20 to 40min. Compared with an existing technology of only microwave single activation or red mud-bentonite compounding, in the embodiment of the invention, microwave-ultrasonic wave synergistic activation and a mixture of superfine slag powder-nano SiO2-sodium lignin sulfonate and ammonium formate are introduced into the red mud-based binder in a ternary synergistic manner for the first time; and the problems of activity, strength and grade loss are synchronously solved on the premise of not introducing bentonite.

The invention discloses a composite material with a near-zero temperature coefficient. The composite material comprises composite particles with three layers of core shells, the composite particle comprises a metal organic framework serving as an inner core, a conductive carbon transition layer serving as a middle layer and a gradient doped tin oxide layer serving as a shell, and the resistance temperature coefficient symbols of materials of the inner core and the shell are opposite within the range of 0-80 DEG C. According to the composite material with the near-zero temperature coefficient, a three-layer core-shell structure of a metal organic framework core / a conductive carbon transition layer / a gradient doped SnO2 shell is adopted, mutual offset of temperature coefficients can be achieved in the material, and therefore drifting of baseline resistance generated along with fluctuation of the environment temperature is reduced.

A composite particle composed of spinel and disordered rock salt domains interspersed therein, made by removing lithium from a disordered rock salt to form a lithium deficient disordered rock salt and heating the lithium deficient disordered rock salt for a time and temperature to form the composite particle.

This invention discloses a laser deposition apparatus and method for simultaneously feeding wire and powder to improve the performance of deposited layers. The apparatus comprises: a support; a wire feeding device mounted on the support and adapted to feed wire to a substrate; a laser device mounted on the support and adapted to emit a laser to melt the wire to form a molten pool on the substrate; and a powder feeding device mounted on the support and adapted to feed composite particle powder to the molten pool. The composite particle powder includes micron-sized powder and nano-sized powder, with the nano-sized powder adhering to the outer surface of the micron-sized powder. The laser deposition apparatus for simultaneously feeding wire and powder to improve the performance of deposited layers according to embodiments of this invention has advantages such as short production cycle, low cost, high flexibility, good strength and plasticity of the deposited layer, and high reliability.

A process for preparing composite particles comprises depositing silicon in the pores of the porous particles to form silicon-containing composite particles and contacting the silicon-containing compo

This invention belongs to the field of metal matrix composite technology, specifically relating to a method for preparing a horizontally continuously cast copper-aluminum composite material. The preparation method includes the following steps: continuously forming a copper plate; controlling the temperature of the copper plate to be no lower than 900°C between the output copper plate and the aluminum melt inlet; using an inert gas, cold-spraying nano-aluminum nitride and micron-sized copper composite particles onto the copper plate strip; then cold-spraying nano-titanium and micron-sized aluminum composite particles to form a composite coating on the copper plate; the aluminum melt flows out onto the composite coating, and after cooling, the aluminum melt solidifies on the copper plate and forms a metallurgical bond with the copper plate; rolling is then performed to obtain the copper-aluminum composite material. The preparation method of this invention can suppress the formation of brittle phases at the copper-aluminum composite interface and improve the interface stability during processing.

An absorbent composition includes composite granules formed from at least diatomaceous earth and sodium bentonite. The diatomaceous earth can include greater than 50 weight % of the composition, based on the total weight of the composition, and a weight ratio of the diatomaceous earth to the sodium bentonite can be within a range of from 51:49 to 95:5. The individual particles of diatomaceous earth composed of the composite granules have a d90 particle size of 500 μm or smaller and the individual particles of sodium bentonite composed of the composite granules have a d90 particle size of 250 μm or smaller.

An electrode 1 includes: a current collector 2; an active material layer 4 stacked on a surface of the current collector 2; and a composite particle group 6 containing a plurality of composite particles 8 in which a conductive material and a binder are made composite and being dispersed in the manner of islands at an interface between the current collector 2 and the active material layer 4.

The invention relates to the technical field of composite electroplating, in particular to an electroplating method for preparing a high-wear-resistance self-lubricating plating layer, which comprises the following steps: firstly, carrying out pretreatment of oil removal and acid pickling activation on a metal workpiece; then preparing a nano composite nickel plating solution in which a nickel plating basic solution contains a nano particle composite phase subjected to pre-dispersion treatment, and the total concentration of composite particles is 10-60g / L; then the dispersion stability of the nano-composite nickel plating solution is maintained in a circulating filtration and mechanical stirring combined mode, and the pretreated workpiece is electroplated; and finally, after electroplating is completed, the workpiece is cleaned and dried. According to the electroplating process for preparing the nickel-based composite coating with high wear resistance and low friction coefficient, the pulse current is adopted, and the high instantaneous current density and turn-off time of the pulse current are utilized, so that desorption and rearrangement of adsorbed particles are facilitated, uniform embedding of the particles is promoted, nickel matrix crystal grains are refined, and the compactness and comprehensive mechanical properties of the coating are further optimized.

The invention belongs to the technical field of surface treatment and electroplating, and provides a high-corrosion-resistant and wear-resistant silver coating material and a spraying method of the high-corrosion-resistant and wear-resistant silver coating material on a copper bar. Silver nitrate, ammonia water, sodium thiosulfate pentahydrate, potassium carbonate and potassium hydroxide are compounded to form a stable complexing system, an aluminum oxide core in the composite particle provides mechanical support, a silver shell guarantees electric conduction continuity, a hexagonal boron nitride sheet provides layered sliding anti-attrition, and silver nanodots reinforce interface bonding, so that the hardness of a silver layer is improved by 30% or above; the technical problems that a traditional silver plating layer is poor in abrasion resistance, a cyanide-containing system is environmentally friendly, and an alkaline cyanide-free system silver layer is insufficient in compactness are solved, and the method has the wide application value in the field of local silver spraying and plating of the copper bar lap joint face of power equipment and high-reliability conductive contact.

The invention discloses a preparation method of a temperature-sensitive color-changing iron oxide-based material, and belongs to the technical field of iron oxide pigments. The preparation method comprises the following steps: mixing iron oxide powder and cobalt aluminate spinel powder, carrying out ball milling, and carrying out spray drying granulation on the mixed powder to obtain composite particles; adding the composite particles into a zirconium oxide solution for hydrothermal reaction, filtering and washing after the reaction is finished, and calcining at high temperature to obtain the temperature-sensitive color-changing iron oxide-based material. The ZrO2 buffer layer is introduced, the problem that an existing composite system is insufficient in cycling stability is effectively solved, after multiple times of temperature cycling, the color changing efficiency of the pigment can still be maintained at a high level, and the application reliability of a product needing a temperature-sensitive color changing function to be repeatedly used for a long time is ensured.

Composite particles contain electrode active material particles, a conductive material, and a binder. The electrode active material particles have a number-based median diameter of primary particles of not less than 0.2 µm and not more than 4.0 µm . The composite particles have a D50 of not less than 20 µm and not more than 250 µm and a D90 / D10 of not less than 2 and not more than 30 in a volume-based particle diameter distribution. The proportion constituted by carbon atoms at surfaces of the composite particles is not less than 20 mass% and not more than 70 mass%.

The invention relates to the technical field of material science and engineering, in particular to TiC-WC composite particles with density matching and neutral buoyancy characteristics and a preparation method of the TiC-WC composite particles. The TiC-WC-Ni / Ni-Co composite particle comprises a composite particle body composed of TiC, WC and a Ni / Ni-Co adhesive, the overall bulk density is controlled to be 7.5-8.5 g / cm < 3 >, fine-grained and coarse-grained particles are applied separately through a dual-granularity application strategy module, and the interface bonding performance is improved by means of a metallurgical wettability enhancing module. The method has the beneficial effects that according to the technical scheme, the problem of uneven distribution of hard phases in a welding pool is solved by accurately regulating and controlling the density of the composite particles, uniform suspension of the particles is ensured, meanwhile, the erosive wear resistance and mechanical impact resistance of a welding layer are improved, and the method is suitable for flux-cored wire filling and surfacing pool putting scenes; and the method has excellent performance stability and process controllability.

Disclosed is a composite particle including an alumina particle and an inorganic coating layer provided on the surface of the alumina particle. The alumina particle contains molybdenum (Mo), and the inorganic coating layer contains a composite metal oxide.

The invention relates to the technical field of welding materials and composite materials, in particular to a preparation method of WC-Al2O3-FeTi composite particles for a flux-cored wire. The method comprises particle composition design and a surface coating structure. The composite particles are composed of WC, Al2O3, FeTi and SiO2, a graphite coating layer is arranged on the outer layer, and a neck chain connecting structure is formed through spray drying granulation, acid pickling neutralization, resin coating carbonization and high-temperature sintering. The invention has the following beneficial effects: according to the technical scheme, a double-ceramic synergistic mechanism is introduced into particle composition, WC is utilized to provide a high-hardness wear-resistant skeleton, Al2O3 is utilized to enhance high-temperature adhesion resistance and thermal stability, dissolution loss of single WC at high temperature is effectively inhibited, wettability between ceramic and a metal molten pool is improved through FeTi, and the wear resistance of the ceramic is improved; and fine titanium carbide or oxycarbonitride is generated, an interface transition layer is formed, and the metallurgical bonding capacity of particles and a metal molten pool is improved.

This invention relates to the field of new energy materials technology, and particularly to a high-entropy oxide particle, its preparation method, and its application. The invention involves mixing a polyacrylonitrile solution and a metal precursor to obtain a mixed liquid; spraying the mixed liquid into droplets and injecting it into water to obtain composite particles; drying the composite particles and then heat-treating them in air to obtain a microsphere-shaped metal precursor; calcining the microsphere-shaped metal precursor to obtain high-entropy oxide particles. This method is simple and scalable, meets the synthesis requirements of various high-entropy systems, and the resulting micro-regions are easy to refine with uniform elemental proportions, without introducing any impurities. It overcomes the problems of high cost, impurity introduction, and complex processes associated with traditional oxide material synthesis.

An object of the present invention is to provide a composite particle that can achieve both a high silicon utilization rate and suppression of oxidation during water dispersion. A composite particle of the present invention is a composite particle including a particle including a carbon material and silicon, and a coating layer including carbon and oxygen on the surface of the particle, in which the composite particle has a true density of 1.80 to 1.99 g / cm3; in the Raman spectrum, a peak is present at 450 to 495 cm-1, and when the intensity of the peak is defined as ISi and the intensity of the G band is defined as IG, ISi / IG is 1.3 or less; and when the ratios of the number of atoms of Si, O, and C in X-ray photoelectron spectroscopy are defined as ASi, AO, and AC, respectively, and the ratios of SiO2 and SiO are defined as BSiO2 and BSiO, respectively, ASi is 0.05 or more, and ISi / IG and Ac / (Ac + ASi × (BSiO2 + BSiO)) have predetermined relationships.