150 results about "Composite pellet" patented technology

The present invention provides an alumina particle containing molybdenum (Mo) and an inorganic coating part provided on the surface of the alumina particle.

The invention relates to the technical field of high polymer materials, in particular to a high-performance composite material based on TPU waste recovery and a preparation method of the high-performance composite material. The problem that the mechanical property and the elastic property of an existing TPU composite material cannot be considered at the same time is solved. Recycled TPU waste particles and EVA particles are used as main raw materials, an ethylene-acrylate-maleic anhydride terpolymer is added as a compatilizer, and modified nano silicon dioxide is introduced as a reinforcing and nucleating agent; carrying out melt blending in a twin-screw extruder, and adding a cross-linking system through a side feeding port to prepare composite particles; and carrying out foaming, sizing and curing treatment by adopting a two-stage high-pressure physical foaming process to obtain the final composite material. Through cooperation of multiple components and precise process control, the problem of poor compatibility is solved, and perfect consideration of mechanical properties and elastic properties is realized.

The invention provides a multi-zone gradient hard alloy material, and relates to the field of hard alloy materials, the multi-zone gradient hard alloy material comprises a drill tip zone, a transition zone and a drill handle zone from the outer layer to the inner layer, the drill tip zone comprises AlTiN, TiCN, ZrC, SiC-B4C composite particles, TaC and Mo2C, the transition zone comprises WC, Co, ZrC, nanoparticles, NbC and carbon nanotubes, and the drill handle zone comprises WC, Co, Ni and ZrC. Through gradient structure design, interface stress concentration in the sintering process is effectively reduced, the hardness and wear resistance of the material are improved, so that the overall crack resistance and service stability of the structure are improved, the service life of the structure is prolonged, and the material is suitable for the field of complex impact loads such as mine drilling and geological survey.

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.

A silicon-carbon composite material, and a preparation method therefor and a use thereof. The silicon-carbon composite material comprises a silicon-carbon composite particle; and the silicon-carbon composite particle comprises a carbon matrix and carbon nanotubes distributed in the carbon matrix, the tubes of the carbon nanotubes containing silicon nanowires.

Silicon subhalide-containing composite particles along with processes for producing and uses for the same. Where the silicon subhalide-containing composite particles have a Si content >30% by weight. Wherein the silicon is placed in and on the pores of a porous matrix. The silicon subhalide-containing composite particles include a halogen concentration of 0.0003 to 16% by weight, a pH of 3 to 9, a volume-weighted particle size distribution having diameter percentiles d50 of 0.5 to 20 μm, and a specific BET surface area of at most 170 m2 / g.

The present invention relates to a preparation method and application of a composite while-drilling leak-proof agent, and belongs to the field of oil drilling engineering technology. The composite while-drilling leak-proof agent is prepared from the following components in percentage by mass: 20-45% nano-composite particles, 15-35% multi-stage fiber-reinforced network materials, 10-20% intelligent response plugging agent, 5-10% high-temperature resistant additive, 1-5% dispersant, and the balance is deionized water, and the total content of each component is 100%. The composite while-drilling leak-proof agent provided by the present invention introduces a core-shell structured thermosensitive resin to realize a three-dimensional synergistic mechanism of "nano-composite particle filling-multi-stage fiber network bridging-intelligent response curing", thereby realizing efficient and environmentally friendly plugging of ultra-high temperature and high-pressure formations. The success rate of single plugging is increased from 45% to 92%, and the average operation time is shortened by 60%, providing an efficient solution for deep and ultra-deep drilling.

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.

A product and method of producing a product that may comprise diatomaceous earth, clay and dispersant. The clay may comprise (a) attapulgite or (b) sepiolite or (c) attapulgite and sepiolite. A portion of the clay and a portion of the diatomaceous earth is agglomerated to form a plurality of composite particles, wherein the composite particle is at least partially surface treated with the dispersant. The product may have a particle size distribution having a d50 of 5-40 microns and a d10 of 1-15 microns. The product may have a median pore diameter of 2-10 microns, a pore volume of 1-4 mL / g and a bulk density of 50-300 kg / m3.

The application discloses a preparation method of iron-based metal hollow spheres, and belongs to the technical field of porous metal materials. The method comprises the following steps: coating stainless steel powder on the surface of anhydrous calcium chloride spherical particles by mechanical mixing with anhydrous ethanol as a binder to obtain composite particles, and then sequentially drying, sintering and ultrasonic cleaning to obtain the iron-based metal hollow spheres; the sintering comprises the following steps: first, drying the composite particles and then keeping the temperature at 750 DEG C for 60-120 min; then keeping the temperature at 800 DEG C for 30-120 min; finally, increasing the temperature to 1100 DEG C-1200 DEG C and keeping the temperature for 120-180 min. The preparation method has the advantages of controllable process, high product yield, low cost, mass production and the like. In addition, the pore size, wall thickness and particle size of the iron-based metal hollow spheres prepared by the method can be flexibly controlled, and the metal hollow spheres have high surface density, good sphericity and high strength.

The present invention discloses a fast-reducing composite pellet, a preparation method, and a pellet reduction process. The composite pellet comprises a core containing a reducing agent with a high volatile content, an intermediate calcium carbonate layer, and an iron-containing shell layer. During the reduction roasting process of the pellet, the core layer decomposes to release a large amount of H2, CO, and CH4, which participate in the reduction of iron oxides. The calcium carbonate layer then undergoes a decomposition reaction to release CO2, which reacts with the carbon in the core to produce more CO through a Boudall reaction. As the CO diffuses outward, it reduces the iron oxides in the shell layer. This allows the iron oxides inside and outside the iron-containing shell layer of the pellet to undergo reduction reactions simultaneously, resulting in a faster reduction rate and higher reduction strength than conventional pellets or pellets with internal carbon.

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 provides a preparation method of a high-heat-resistance and high-wear-resistance aluminum-based composite material, which comprises the following steps: carrying out high-temperature oxidation treatment on MAX-phase ceramic particles to form oxides on the surfaces of the MAX-phase ceramic particles and obtain composite particles with MAX phases as cores and oxides as shells; mixing the composite particles, SiC ceramic particles and aluminum powder to obtain mixed powder; and the mixed powder is sequentially subjected to cold press molding treatment and powder metallurgy sintering treatment, and the aluminum-based composite material is obtained. According to the method, an oxide layer is formed on the surface of the MAX phase ceramic particles through high-temperature oxidation treatment, in the subsequent powder metallurgy sintering treatment process, the MAX phase reacts with Al to generate A13Ti, oxide enters A13Ti crystals, and oxide compounded A13Ti particles are formed; in addition, in-situ A13Ti generated by reaction of MAX and Al can form a low-energy interface with a coherent relationship with an Al matrix, an Al grain boundary can be effectively pinned, grain coarsening and interface degradation caused by high temperature are avoided, and therefore the composite material has high heat resistance.