194 results about "Composite pellet" patented technology

The invention relates to a preparation method and application of a composite leakage-proof agent while drilling, and belongs to the technical field of petroleum drilling engineering. The composite leakage-proof agent while drilling is prepared from the following components in percentage by mass: 20-45% of nano composite particles, 15-35% of a multi-stage fiber reinforced network material, 10-20% of an intelligent response blocking agent, 5-10% of a high-temperature-resistant additive, 1-5% of a dispersing agent and the balance of deionized water, wherein the sum of the contents of all the components is 100%. According to the composite leak-proof agent while drilling provided by the invention, the temperature-sensitive resin with a core-shell structure is introduced, so that a three-dimensional synergistic mechanism of nano-composite particle filling-multistage fiber network bridging-intelligent response curing is realized, and efficient and environment-friendly plugging of an ultrahigh-temperature and high-pressure stratum is realized. The success rate of one-time plugging is increased from 45% to 92%, the average operation time is shortened by 60%, and an efficient solution is provided for deep and ultra-deep drilling.

The invention relates to a preparation method of a multi-layer composite pellet and the pellet. The preparation method comprises the following steps: mixing hematite powder, pellet return ore powder, boric sludge powder and dolomite powder to prepare pretreated hematite powder; uniformly mixing magnetite powder and bentonite to obtain a mixture; pelletizing the mixed material; spraying atomized water and conveying the pretreated hematite powder into the pelletizer to prepare green pellets; and the green pellets are dried, preheated and roasted to produce finished pellets, and screened unqualified products are made into pellet return ore powder to return to participate in batching again. According to the method, the purpose of producing the high-quality pellets with the hematite as the main raw material is achieved, the problem that in the pellet production process, due to the fact that the proportion of the hematite is too high, the pellet index becomes poor is solved, the pellet melting dripping performance is greatly improved, and the technical problem that magnetite concentrate is mainly used for pellet production is solved; and secondary resources such as pellet return charge and boric sludge are fully utilized, so that the production cost of the pellets is reduced.

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.

Parts made by additive manufacturing are often structural in nature, rather than having functional properties conveyed by a polymer or other component. Printed parts having piezoelectric properties may be formed using compositions comprising a plurality of piezoelectric particles non-covalently interacting with at least a portion of a polymer material via π-π bonding, hydrogen bonding, electrostatic interactions stronger than van der Waals interactions, or any combination thereof. The piezoelectric particles may be dispersed in the polymer material and remain substantially non-agglomerated when combined with the polymer material. The polymer material may comprise at least one thermoplastic polymer, optionally further including a polymer precursor. The compositions may define an extrudable material that is a composite having a form factor such as a composite filament, a composite pellet, a composite powder, or a composite paste. Additive manufacturing processes using the compositions may comprise forming a printed part by depositing the compositions layer-by-layer.

The invention discloses a manganese-copper alloy composite material and a preparation method thereof. The preparation process comprises the following steps: step 1, adopting copper powder, manganese powder and silicon powder with the purity of 99.9% or above as main elements of a matrix alloy; 2, copper powder, manganese powder, silicon powder and the composite particles are evenly mixed according to the mass percent; step 3, loading the uniformly mixed powder into a mold; 4, sintering the material after hot press molding; 5, the sintered alloy material is subjected to aging treatment; sixthly, hot rolling or hot extrusion treatment is conducted; and 7, the prepared alloy composite material is subjected to polishing or coating surface treatment, and preparation is completed. The manganese-copper alloy composite material is prepared by adopting the steps. The composite particles are added into the manganese-copper alloy to serve as a reinforcing phase, the strengthening phase is formed, the abrasion resistance of the material is greatly improved, the internal component and structure gradient of the material is effectively achieved, and comprehensive improvement of the performance of the manganese-copper alloy is successfully achieved.

The invention belongs to the technical field of long fiber granulation, and discloses a long fiber continuous extrusion and granulation integrated process which comprises the following steps: S1, a fiber pretreatment and feeding system; s2, carrying out low-shear twin-screw melt extrusion; s3, melt impregnation and pressure control; s4, intelligent traction and cooling pelletizing; s5, an online quality monitoring system; and S6, a wear resistance and energy consumption optimization system. According to the invention, a three-dimensional continuous reinforced skeleton is constructed in the generated composite aggregate, the microcosmic expression is that fiber monofilaments are wrapped by matrix resin in a molecular level, and the mechanical anchoring state of the fiber end part at a cutting section is maintained while the interface defect is eliminated; according to the structure, the fracture energy absorption mechanism of the composite material is converted from the traditional interface debonding leading to the synergistic effect of fiber drawing and matrix plastic deformation, the crack propagation resistance and the anti-fatigue characteristic of a product under a dynamic load are remarkably improved, and the composite material is particularly suitable for light-weight bearing parts for bearing multidirectional alternating stress.

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.

The utility model discloses a feeding system for composite particle production, belongs to the technical field of feeding equipment, and provides a more convenient and efficient feeding system for composite particle production. The feeding system comprises a plurality of raw material bins, each raw material bin is provided with a material storage barrel, a funnel is arranged at the lower end of each material storage barrel, and an electric heating ring is arranged on the outer side of each funnel; the hopper is suitable for melting granular materials in the hoppers, a metering pump is arranged at the lower end of each hopper, the output ends of all the metering pumps are jointly and fixedly connected with a material injection assembly, the material injection assembly comprises a material mixing barrel, and one end of the material mixing barrel is fixedly connected with a speed reduction motor. The metering pumps working independently are arranged at the bottoms of all the raw material bins, the feeding speed of each metering pump is controlled through a computer, so that different raw materials can enter the mixing barrel according to the set proportion at any time and are mixed, weighing does not need to be conducted every time, the mixing process can be continuous, and the mixing efficiency is improved. A weighing tool and an additional storage container are not needed, and the process of obtaining the composite particles is more convenient and efficient.

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 mineral materials, and particularly discloses a high-strength porous composite particle and a preparation method and application thereof.The composite particle is a porous composite particle prepared with attapulgite raw ore as a main material, biomass waste as an auxiliary material and polyvinyl formal as a cross-linking agent; the attapulgite raw ore contains 15%-30% of attapulgite, and the mass of the attapulgite raw ore accounts for 73%-96.5% of the mass of the composite particles. According to the high-strength porous composite particle and the preparation method and application thereof, the stable and high-utilization-rate high-strength porous biomass waste-attapulgite composite particle is prepared, the stability is improved, meanwhile, the higher utilization rate of the particle is achieved, the cost is low, and separation is easy.

The invention provides a powder metallurgy friction material, a powder metallurgy brake pad and a preparation method of the powder metallurgy friction material. The powder metallurgy friction material comprises, by mass, 50 wt%-65 wt% of copper powder, 20 wt%-30 wt% of iron powder and 10 wt%-20 wt% of graphite ceramic composite particles. Based on 100 wt% of the mass of the graphite ceramic composite particle, the graphite ceramic composite particle comprises 50 wt%-70 wt% of expandable graphite, 5 wt%-10 wt% of ceramic powder and 20 wt%-45 wt% of micro-powder graphite. All non-metal phases are added into a metal matrix as a whole in the form of graphite ceramic composite particles, so that the splitting degree of non-metal relative to a matrix framework is reduced, and the problem of poor combination of the non-metal phases and metal is solved. In addition, the powder metallurgy brake pad prepared through low-temperature sintering is low in hardness, and damage and performance fluctuation caused by disc scratching can be further reduced.

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.