26results about How to "High bulk density" patented technology

The invention relates to a method for preparing a lithium iron phosphate / carbon composite material of a lithium ion battery, which belongs to the technical field of lithium ion batteries. The method for preparing the lithium iron phosphate / carbon composite material of the lithium ion battery comprises the following steps of: 1) preparing a suspending graphene-dispersed aqueous solution system, namely, crushing graphite to 1 to 5 microns, adding the crushed graphite into distilled water or purified water, adding 0.1 to 5 percent of surfactant, heating with stirring the mixed solution to 180 to 250 DEG C in a sealing way, performing stirring for 2 to 6 hours and reducing the temperature; 2) crushing lithium iron phosphate to the particle size of 1 to 5 microns, adding the crushed lithium iron phosphate into the distilled water or the purified water, adding with stirring 0.01 to 1 percent of coupling agent, performing uniform stirring, adding the graphene-dispersed aqueous solution, and performing stirring and filtration; and 3) vacuum-drying solid powder obtained by the filtration, and calcinating the dried solid powder for 2 to 12 hours to obtain the graphene-coated lithium iron phosphate cathode material. The method has the advantages of simple process, high material performance, high conductivity, high bulk density, high compacted density and the like.

This invention relates to the field of catalysts, specifically to a polyethylene catalyst and its preparation method, as well as ultra-high molecular weight polyethylene and its preparation method. The method includes the following steps: (1) under diluent conditions, a magnesium halide precursor, an alcohol compound, and a first internal electron donor undergo a first contact reaction to obtain a first reaction solution; (2) a second internal electron donor is added to the first reaction solution to undergo a second contact reaction to obtain a second reaction solution; (3) a titanium precursor is added to the second reaction solution to undergo a third contact reaction to obtain a third reaction solution; (4) a haloalkane is added to the third reaction solution, followed by a third internal electron donor to undergo a fourth contact reaction. The catalyst prepared by this invention exhibits good catalytic performance.

The invention discloses a temperature control method for processing graphite by using double plasma sources, and relates to the technical field of plasma material processing, in particular to a temperature control method for processing graphite by using double plasma sources, which comprises the following steps: adopting a cylindrical reactor, and arranging a plasma source I and a plasma source II up and down along the axial direction on two sides of the cylindrical reactor, and an outlet of the powder feeding mechanism directly faces a core high-temperature area of the plasma source I, so that graphite powder directly enters a heating area. The two sources are connected in series up and down to construct a continuous relay type high-temperature path. The center distance between the powder feeding port and the source I is limited not to exceed half of the outlet diameter of the reactor, the center distance between the two sources is 1-2.5 times of the outlet diameter, and the center distance between the source II and the outlet is larger than 5 times of the diameter; the flow of the second source is 1.2-1.8 times that of the first source, the temperature of the core area is maintained to be 8000-10000 K by adjusting the flow ratio, and the total power does not exceed 100 kilowatts. The total retention time of the graphite powder in a two-source high-temperature area is longer than 0.2 second, the diameter of an outlet of the reactor is 100-400 mm, the reactor is made of high-temperature-resistant stainless steel or graphite, and accurate control over the graphite treatment temperature is achieved.

This invention discloses a method for the biological drying of sludge, comprising the following steps: baking biomass materials, mixing the resulting baked product with sludge, biochar materials, and a conditioner for biological drying, thereby completing the sludge drying process. In this invention, by biologically drying the mixture of baked product, sludge, biochar materials, and conditioner, not only can the self-generated heat within the system be used to effectively dewater the sludge in a very short time, but the bioavailability of the microbial carbon source can also be improved, effectively reducing the generation of polluting gases. This method can effectively reduce the emission of polluting gases while achieving rapid dewatering. It has advantages such as simple process, low treatment cost, low energy consumption, high drying efficiency, good dewatering effect, low polluting gas production, and low content of toxic and harmful components in the dried product. It can solve the problems of biomass resource waste and pollution, achieve sludge reduction and resource utilization, and has high returns and good application prospects.

This invention discloses the contents of a Tibetan Artemisia capillaris capsule, which is prepared from the following raw and excipient materials in weight percentages: 55%–59% filler, 3%–6% flow aid, and the remainder being Tibetan Artemisia capillaris extract; the Tibetan Artemisia capillaris extract is an alcoholic extract of Tibetan Artemisia capillaris. The Tibetan Artemisia capillaris granules of this invention not only meet the quality requirements of the pharmacopoeia but also have low cost, making them suitable for large-scale industrial production.

This invention relates to the field of sodium-ion battery technology, specifically disclosing a sodium iron pyrophosphate (NFPP) cathode material, its preparation method, and its application. The preparation method includes: using iron phosphate as the iron source, mixing it with a specific sodium source, phosphorus source, and composite carbon source; adjusting with deionized water; and then performing precision sand milling to control the slurry particle size D50 within 0.30~0.35 μm to ensure uniform elemental mixing; subsequently, spray drying is performed to obtain a precursor with high sphericity and narrow particle size distribution; finally, programmed sintering is carried out under an inert atmosphere to obtain the final product. This invention solves the problems of uneven elemental distribution, impurity phase formation, low material compaction density, and poor electrochemical performance in existing technologies through synergistic optimization of the entire process chain of sand milling-spray drying-sintering. The obtained NFPP material has a high-purity phase structure. The sodium iron pyrophosphate cathode material prepared by the method of this invention can achieve a 0.1C discharge specific capacity of 101 mA·hg. ‑1 The 1C discharge specific capacity can reach 93 mA·hg ‑1 It is suitable for the preparation of high-performance sodium-ion batteries.

This invention provides a method for preparing high bulk density potassium peroxymonosulfate composite salt. Through multi-dimensional process optimization including multi-point feeding and neutralization, ultrasonic action, crystal guiding agent, heating-heating-heating-cooling, and drying-mixing-sieving, the bulk density of PMS is synergistically improved, and the overall performance of the final product is superior to that of the prior art.

This invention relates to an intelligent continuous production method for Xiaochaihu granules, comprising the following steps: sieving and pulverizing the filler, and conveying it to a preparation silo for airflow premixing; adding the extract to an extract tank and stirring until uniformly mixed; conveying the premixed filler and extract to a mixer, mixing uniformly, adding a wetting agent, and mixing to obtain a soft material; simultaneously premixing the filler for the next batch; conveying the soft material to a granulator for granulation, and feeding the granules into a fluidized bed hot air section for drying; conveying the filler for the next batch to the mixer; after the soft material is conveyed, sequentially conveying the extract and wetting agent to prepare the soft material for the next batch; after the granules are transferred to the fluidized bed cold air section, granulating the soft material for the next batch and feeding it into the fluidized bed hot air section; sieving to obtain the final product. This continuous production method improves production efficiency while also enhancing product quality and stability, and significantly saves materials and energy.

The application discloses a kind of nano-composite ceramic particles modified aluminum alloy powder for 3D printing and preparation method thereof, belong to metal additive manufacturing material technical field.The powder is composed of 7XXX series aluminum alloy powder matrix and TiC and TiB2 nanoparticles attached to its surface.TiC nanoparticle addition amount is 0.3%~1% of total mass, TiB2 is 0.1%~1%, total addition amount is controlled at 0.4%~1%.Two kinds of nanoparticles are uniformly coated on the surface of aluminum alloy powder by low-energy ball milling process, and the "TiB2-Al3Ti-Al" efficient heterogeneous nucleation path is constructed.The application realizes grain ultra-fining and completely crack-free forming under very low ceramic content, while avoiding the plasticity decline and surface treatment performance degradation caused by excessive ceramic phase.The obtained powder has excellent comprehensive performance, and is suitable for the manufacturing of high-strength, high-surface quality components.

The invention discloses a carbon ceramic closing resistor for a high-voltage circuit breaker and a preparation method of the carbon ceramic closing resistor, and belongs to the technical field of power elements. The problems of poor resistor compactness, non-uniform performance, insufficient mechanical property and the like caused by high pressing and sintering difficulty, process instability and high and non-uniform resistor porosity of the carbon ceramic resistor are solved. The preparation process of the resistor comprises the following steps: by taking aluminum oxide and quartz as ceramic phases, presintered kaolin, mullite and potassium feldspar as clay phases and carbon black or graphite as conductive phases, pre-coating the ceramic phases with the clay phases, carrying out vacuum calcination on pre-coated powder, mixing the pre-coated powder with the secondarily added clay phases and the conductive phases, carrying out spray granulation, pressing a green body, sintering and spraying. And obtaining the carbon ceramic closing resistor. According to the invention, the kaolin is pre-sintered, and the clay phase is pre-coated with the ceramic phase, so that the subsequent blank pressing uniformity and density are increased, the structural defects of the carbon ceramic resistor are reduced, and in combination with the spark plasma sintering technology, the batch rapid production of the resistor can be realized.

This invention discloses a ZTA ceramic granulation powder, its preparation method, and its application in pressing and firing ceramic parts. The ZTA ceramic granulation powder is obtained by spray granulation of a raw material slurry comprising the following components: 80-90 parts by weight of α-Al₂O₃ powder, 10-20 parts by weight of ZrO₂ powder, 0.05-1.5 parts by weight of doped powder, 0.1-0.45 parts by weight of TiO₂ powder, 45-60 parts by weight of pure water, 0.5-2.5 parts by weight of cold-soluble polyvinyl alcohol binder, and 0.5-3.5 parts by weight of polyethylene wax emulsion; the doped powder is at least one of MgO powder, Cr₂O₃ powder, and CeO₂ powder; the TiO₂ powder is rutile titanium dioxide. The ZTA ceramic granulation powder of this invention has a round morphology, excellent flowability and bulk density. ZTA ceramic parts made from this granulation powder after pressing and high-temperature firing are white in color, exhibiting lower firing temperatures and better fracture toughness.

The application belongs to the technical field of silicon carbide ceramic preparation, and particularly relates to a silicon carbide ceramic slurry based on DIW-3D printing, a silicon carbide ceramic product and a preparation method. The silicon carbide ceramic slurry is prepared from raw materials including the following components and weight contents: silicon carbide mixed powder 60-100 parts, thermosetting resin 10-40 parts, dispersing agent 5-15 parts and thermal initiator 0.01-1 part. The application realizes the application of DIW-3D printing in the preparation of silicon carbide ceramic through the synergistic effect of double-particle-size SiC grading, introduction of B4C sintering aid, special resin and dispersant system, thermal initiation and solidification, DIW rheological design and gas pressure sintering, saves the material cost in the manufacturing process, prepares a silicon carbide sample with excellent mechanical properties, and further widens the development of silicon carbide ceramic.

This invention relates to a fly ash granulation and pelletizing system, a fly ash low-temperature pyrolysis treatment system and method, belonging to the technical field of fly ash treatment for municipal solid waste incineration. The fly ash granulation and pelletizing system includes a feeding device, a granulator, a crusher, and a fly ash feed hopper arranged sequentially along the material flow direction; the feed hopper cover of the granulator is provided with a fly ash inlet; the lower part of the fly ash feed hopper is provided with a fly ash discharge port, and a fly ash discharge valve is provided at the fly ash discharge port. This invention granulates fly ash through a granulation and crushing process, forming a mixture with a particle size of 50μm~10mm and a bulk density of 1~1.5t / m³. 3 This significantly improves the throughput and operational stability of the pyrolysis process.

A kind of filling device for cryogenic spherical tank interlayer cold insulation material, nitrogen tank outlet is sequentially communicated with the inlet of pneumatic dust pump by valve and nitrogen pipeline, cold insulation material filling box is sealed with the inlet of pneumatic dust pump by cold insulation material transport pipe I, the top interlayer of cryogenic spherical tank is sealed with pneumatic dust pump by cold insulation material transport pipe II;Vacuumizing port is arranged at the bottom interlayer of cryogenic spherical tank, and the vacuumizing port is sealed with vacuumizing pipeline, high vacuum baffle valve is installed on the vacuumizing pipeline at the vacuumizing port, and the tail end of vacuumizing pipeline is sealed with filter;Vacuum pump unit is connected with filter, cooling water system is connected with the inlet and outlet of vacuum pump unit;Vibration motor is installed in the lower part of outer spherical tank of cryogenic spherical tank.The utility model has the advantages of simple structure, easy installation, can greatly improve filling efficiency and heat insulation performance, reduce the heat loss of cryogenic spherical tank.

The application provides a pre-stress insulator porcelain piece and a preparation method thereof, and belongs to the technical field of power equipment. The pre-stress insulator porcelain piece comprises the following components in percentage by weight: calcined industrial alumina 15-30%, quartz powder 5-15%, potassium feldspar 12-25%, and clay 30-60%. The pre-stress insulator porcelain piece has a density gradient in the inner and outer layers of the blank, which can essentially offset the tensile stress of the whole porcelain piece caused by the isostatic pressing and extrusion process, has excellent mechanical properties, and has important significance for meeting the demand of increasing the voltage grade of power transmission and transformation lines.

The application relates to the technical field of performance regulation of recycled concrete, and relates to a recycled concrete performance regulation method and system based on aggregate gradation optimization, which comprises the following steps: confirming a recycled concrete performance regulation environment based on a recycled concrete performance regulation instruction, pretreating engineering slag soil by using an aggregate pretreatment unit, grading the coarse aggregate sand and the fine aggregate sand based on an aggregate gradation optimization unit, pouring recycled lightweight aggregate concrete mixture by using a curing control unit, detecting the compressive strength, apparent density and thermal conductivity of the recycled concrete test piece by using a performance evaluation and regulation unit, and comparing and analyzing the actually measured performance index set with the preset target performance index set, so that the recycled concrete performance regulation of the engineering slag soil is realized based on the regulated recycled concrete. The application can improve the accuracy, efficiency, resource utilization rate and engineering applicability of the recycled concrete performance regulation.

This invention discloses a method for preparing acesulfame potassium granules, which specifically includes the following steps: (1) First, prepare an acesulfame potassium alkali solution by adding acesulfame potassium to a 2wt% alkaline aqueous solution to obtain an acesulfame potassium alkali solution of a certain mass concentration; (2) Add 1000mL of alcohol solvent to a crystallization vessel and maintain a certain temperature and stirring rate; (3) Then add the acesulfame potassium alkali solution to the alcohol solvent at a rate of 0.1mL / min, and stop feeding when the acesulfame potassium alkali solution / alcohol solvent reaches a certain volume ratio; (4) Continue to maintain the temperature and stirring in (2), filter after a certain time, and then dry at 50℃ for 12h to obtain the acesulfame potassium granule product.

This invention belongs to the field of tower foot welding technology, specifically referring to a welding device for the feet of power angle steel towers. It includes a support frame, a transverse slide, a positioning platform, a measuring drive mechanism, a dust-collecting welding mechanism, a compressed air anti-scattering mechanism, and a controller. The transverse slide is mounted on the upper wall of the support frame, and the positioning platform is symmetrically positioned on the upper walls at both ends of the support frame. The measuring drive mechanism is mounted on the transverse slide and includes a drive component, a sliding component, and a measuring component. The drive component is located on the upper walls at both ends of the transverse slide, the sliding component is located on the upper wall of the transverse slide, and the measuring component is located on the side wall of the drive component. This invention provides a welding device for the feet of power angle steel towers capable of collecting welding fumes generated during the welding process and compressing the dust particles in the welding fumes into a cake to prevent secondary diffusion of the fumes.

This invention provides a method for preparing a quartz crucible with low bubble expansion rate, belonging to the field of quartz crucible production technology. The method includes: S1, pouring quartz sand into a mold and using centrifugal molding to form a crucible bubble layer and a transparent layer, wherein the crucible bubble layer uses coarse-grained quartz sand, and the crucible transparent layer uses fine-grained quartz sand; S2, inserting the formed quartz sand along with the mold into a melting chamber and starting a vacuum pump to evacuate to a predetermined pressure; S3, igniting an arc in the mold, and during the formation of the crucible transparent layer, performing a first stage of high-temperature melting on the quartz sand using a first preset power; S4, in the later stage of melting, performing a second stage of high-temperature melting on the quartz sand using a second preset power, and after the second stage of high-temperature melting, removing the mold to obtain a quartz crucible with low bubble expansion rate. This invention, through the combination of quartz sand particle size matching and melting power adjustment, ultimately prepares a quartz crucible with low bubbles and low bubble expansion rate.

This invention belongs to the field of capacitor technology and discloses a composite activated carbon, its preparation method, and its application. The composite activated carbon comprises activated carbon and graphene generated in situ. When the composite activated carbon of this invention is used to prepare supercapacitor electrodes, the prepared electrodes have high specific capacitance and high volumetric specific capacitance.

The present application relates to the field of pitch, and discloses a kind of impregnated pitch and its preparation method and application, which comprises: (1) oil slurry I is separated, and the intermediate distillate oil with initial boiling point 390-420 DEG C and final boiling point 450-470 DEG C is obtained;(2) in the presence of inert gas I, the intermediate distillate oil is carried out first heating reaction, and heavy distillate oil is obtained;(3) in mixed gas, the heavy distillate oil is carried out second heating reaction, and impregnated pitch is obtained;The volume ratio of inert gas II and air in the mixed gas is 1:2-5;The temperature of the second heating reaction is at least 30 DEG C lower than that of the first heating reaction;The pressure of the first heating reaction and the second heating reaction is independently 0.05-1 MPa respectively.The impregnated pitch prepared by the method of the present application has the advantages of low softening point, low quinoline insoluble content and high coking value, and can enhance the bulk density of graphite electrode when applied to graphite electrode.

The application relates to the technical field of non-silicon heat-conducting paste processing, in particular to a non-silicon heat-conducting paste with ultra-low thermal resistance and high-temperature resistance and a preparation method thereof, which is prepared from the following raw materials in parts by weight: alkyl naphthalene 30-50 parts, alkyl benzene 5-15 parts, hydrogenated terphenyl 10-20 parts, polyether base oil 5-10 parts, superfine heat-conducting filler 60-80 parts, structure directing agent 4-8 parts, perfluoropolyether phosphate 0.5-1 part and antioxidant 1-3 parts. By adopting the above formula, a non-silicon compound oil phase system is constructed, the superfine heat-conducting filler, the structure directing agent and the perfluoropolyether phosphate are combined, high thermal conductivity, ultra-low thermal resistance and excellent interface adhesion are realized, the risk of silicon volatilization pollution is completely eliminated, high-temperature oxidation resistance and long-term reliability are improved, and the urgent needs of 5G, AI and other high-heat-density electronic equipment for non-silicon high-performance thermal interface materials are effectively met.

This application discloses a post-processing technology and apparatus for ViGa gas atomization powder production. The process employs a four-step synergistic treatment: graded pre-separation, plasma desorption, vibration densification, and cooling shaping. First, a three-stage airflow classifier removes free fine powder. Then, radio frequency plasma bombardment desorbs attached satellite spheres and melts irregular protrusions on the powder surface. The powder is then densified and residual satellite spheres are removed via an ultrasonically vibrating fluidized bed. Finally, rapid cooling with inert gas shapes and fixes the spherical morphology. The apparatus integrates a feeding system, a grading module, a plasma module, a vibration module, a cooling module, and a control system, enabling precise control of process parameters. This application reduces the satellite sphere content in the powder to below 5%, increases sphericity to above 0.95, achieves a Hall flow rate ≤25s / 50g, a powder deformation rate <2%, and a single-batch energy consumption <200kW·h / ton. It is compatible with various ViGa gas atomization powders and solves the problems existing in the prior art.

The application relates to a high-boron austenitic stainless steel powder for laser additive manufacturing and a preparation method, wherein the high-boron austenitic stainless steel powder for laser additive manufacturing is composed of the following components in percentage by mass: C: <=0.04%, Si: 0.3-1.0%, Cr: 19-22%, Ni: 11-15%, Mn: 1.2-3.0%, B: 0.8-1.6%, N<=0.01%, O<=0.04%, S<=0.02%, P<=0.02%, and Fe is the balance. The high-boron austenitic stainless steel powder has good loose bulk density, tap density and fluidity, the tensile strength of the obtained high-boron austenitic stainless steel powder in a laser additive manufacturing accumulated state can reach more than 950 MPa, the elongation after fracture is more than 14%, meanwhile, the high-boron austenitic stainless steel powder has good local pitting corrosion resistance, and is suitable for complex components and integral forming in the fields of spent fuel treatment and transportation container manufacturing.

This invention discloses a method for preparing L-carnosine spherical crystals, comprising the following steps: dissolving L-carnosine in a good solvent, water, to obtain an aqueous solution containing L-carnosine; controlling the temperature of the aqueous solution and continuously stirring; adding a poor solvent to the L-carnosine-containing aqueous solution to precipitate L-carnosine spherical crystals; and separating and drying the spherical crystals to obtain the L-carnosine spherical crystals. The good solvent is water; the poor solvent is N,N-dimethylformamide and / or dimethyl sulfoxide. The preparation process of the L-carnosine crystals prepared by this invention is simple, involving only water and a poor solvent, and the process is straightforward. The particle size can be adjusted by the concentration of the aqueous solution and the stirring rate, resulting in an average particle size of 50–200 μm. The product particles are rounded, have high flowability, an angle of repose of 30°–37°, and a bulk density of 0.4–0.7 g / cm³. 3 This solved the problems of poor crystal morphology and poor particle flowability of L-carnosine.

The present application relates to the technical field of electronic packaging interconnection, and discloses a multi-scale copper sintering paste, a preparation method and application thereof.A multi-scale copper sintering paste is composed of 85wt.% of multi-scale copper particles and 15wt.% of raw materials of an organic system.The multi-scale is a mixture of nano-scale, sub-micron scale and micron scale; and the organic system includes a solvent, a diluent, a dispersant and a binder.The multi-scale copper sintering paste of the present application realizes low-temperature dense sintering interconnection by using multi-scale copper particles for dense packing, and can obtain an interconnection head with high strength (≥90MPa), high thermal conductivity (≥300W / m·K) and high electrical conductivity (≥1×10 7 S / m), which meets the process and performance requirements of third-generation semiconductor chips and electronic packaging interconnection.