16results about How to "Reduce add" patented technology

This invention discloses a medium carbon steel for steering screws in new energy vehicles and its production method. The chemical composition of the medium carbon steel, by mass percentage, is as follows: C: 0.45%~0.70%, Si: 0.25%~0.55%, Mn: 0.45%~1.05%, Cr: ≤0.40%, Mo≤0.40%, Ni≤0.40%, P≤0.035%, S: 0.015%~0.035%, O≤0.0012%, with the balance being Fe and unavoidable impurities. The production method includes a complete process: molten iron pretreatment – ​​converter smelting – LF refining – RH furnace vacuum degassing – continuous casting – rolling – quenching and tempering – finishing – sub-critical quenching – low-temperature tempering. By controlling the composition to reduce the addition of expensive alloying elements, and through a composite heat treatment of "quenching and tempering + sub-critical quenching + low-temperature tempering," a hardness gradient of ≥60HRC on the surface and 22~28HRC in the core is achieved, with no decarburized layer on the surface. Simultaneously, strict control of non-metallic inclusions enhances the purity of the steel. This invention's product is compatible with cyclone milling processes, exhibits minimal quenching deformation, and can be straightened, meeting the high precision and long service life requirements of steering screws in new energy vehicles.

The invention discloses a cool regenerated colored polyamide fiber and a preparation method thereof, and belongs to the technical field of chemical fiber preparation. The preparation method comprises the following steps: firstly, melting and spinning cool master batch, regenerated chinlon chips and other raw materials to prepare cool regenerated chinlon POY (Polyester Pre-Oriented Yarn) fibers; meanwhile, melt spinning is conducted on the color master batch, the regenerated chinlon slices and other raw materials, and stock solution coloring regenerated chinlon POY fibers are prepared; and finally, stranding the two functional POY fibers through a false twist texturing process to prepare the cool regenerated colored chinlon DTY fiber. By means of the step-by-step spinning and plying elasticizing integrated technology, the cool feeling, coloring and regeneration environment-friendly characteristics are combined in the fiber manufacturing stage, and the final product has the comprehensive advantages of being excellent in cool feeling durability, high in color fastness, simplified in production technology and environmentally friendly.

This invention relates to the field of carbon material preparation technology, specifically disclosing a method for preparing porous carbon materials using a hierarchical synergistic activation method and its application. This method uses waste biomass from *Siraitia grosvenorii* pomace as raw material, sequentially undergoing low-temperature pre-activation, water washing, high-temperature synergistic activation, and isothermal acid washing to obtain porous carbon materials with ultra-high specific surface area. Scanning electron microscopy analysis and pore structure detection results show that the carbon material exhibits a hierarchical porous layered structure. Electrochemical tests show that the material possesses excellent capacitance performance, with a specific capacitance reaching 200-450 F / g at a current density of 0.5 A / g. When this porous carbon material is assembled into a symmetrical supercapacitor, after 10,000 cycles at a current density of 10 A / g, the specific capacitance retention rate remains above 90%, demonstrating good cycle stability and showing promising application prospects in the field of energy storage.

The present application relates to a kind of high flame-retardant low-toxicity environmental protection computer cable and its preparation method, belong to computer cable technical field.The insulating layer and / or sheath layer of the cable uses environmental protection toughening flame-retardant composite material, it is with polyolefin resin as matrix, compound modified nano-aluminum hydroxide with KH560 silane coupling agent, melamine cyanurate, gradient compound ethylene-vinyl acetate copolymer and maleic anhydride graft polyolefin, by limiting core component ratio and key parameter, realize high flame-retardant, low-toxicity environmental protection and low-temperature toughness Synergistic unity.The present application process is simple and easy industrialization, applicable to computer room, automation control system, instrument signal transmission and other scenes, practicality is strong.

The application discloses a kind of preparation methods of flame-retardant aging-resistant high-transparency polyurethane, the polyurethane is first with 2-amino-1,3-propanediol, 2-chloro-4,6-diphenyl-1,3,5-triazine, diphenyl phosphorochloridate and triphenylchlorosilane composite preparation DADT, then DADT is mixed with polyether polyol, isocyanate to obtain;The preparation method of the application is simple, the process is easy to control, the obtained polyurethane material limit oxygen index reaches 29.6%, meets commercial flame-retardant standard and reaches UL-94 V-0 flame-retardant grade;Material has excellent aging resistance, heat-oxygen tensile strength retention rate is 88.5%, heat-oxygen breaking elongation retention rate is 77.4%, and ultraviolet breaking elongation retention rate is 71.4%, can be applied to automobile ultraviolet protection diaphragm, flame-retardant filled foam, fire guide sign protection film and the like scene.

The present application relates to a kind of crusher super wear-resistant cone lining plate steel and its preparation method, contains the following components by mass percentage: C:1.30-1.50%, Mn:22-25%, Si:0.35-0.80%, Cr:2.0-2.5%, V:0.1-0.15%, Ti:0.06-0.12%, N:0.05-0.08%, Mo:0.3-0.6%, P≤0.035%, S≤0.015%, the balance is Fe and inevitable impurities.Mass ratio of Mn / C is 16-18, mass ratio of Cr / V is 16-20, and total mass ratio of Cr+Mo≤2.8%.The hardness of steel can reach 289HB, impact toughness can reach 203J / cm 2 , tensile strength can reach 849MPa, reduce the mass addition of Ni, Mo and other elements, greatly reduce cost.

The invention relates to the field of microbial fermentation, in particular to a saccharification and liquefaction bifunctional recombinant yeast strain as well as a construction method and application thereof. The invention provides a recombinant yeast strain with saccharification and liquefaction dual functions, and the recombinant yeast strain has better clinker fermentation and raw material fermentation capabilities through co-expression of high-enzyme-activity alpha-amylase and glucoamylase genes. Under the conditions of clinker fermentation and raw material fermentation, the fermentation alcohol content of existing strains can be improved, addition of exogenous enzymes is reduced, cost reduction and yield increase of biological raw material ethanol can be achieved, and the large-scale industrial production requirement is met.

The utility model relates to circulating device field especially relates to a numerical control lathe swarf liquid circulating device, including the recycling box and the circulating component, the inside installation of recycling box is used for the recycling recycling use of fully processing swarf liquid circulating component, and the circulating component includes the composite filter screen, storage bin, liquid outlet pipe, docking disc, filter ring, solenoid valve, connecting plate, recycling disc, charging frame, and the inside of recycling box is provided with recycling groove, and the inside symmetry of recycling groove is equipped with the composite filter screen, and the outer end corner of composite filter screen is equipped with the limiting bolt, and the composite filter screen is fixed with recycling box thread through limiting bolt, and the inside of recycling box is located composite filter screen one side and is provided with storage bin, and the inner wall symmetry of recycling groove is provided with multiple groups of guide grooves, the utility model discloses through adopting the composite filter screen to the multistage full filtration separation of swarf liquid, effectively screens out the swarf in cutting fluid, reduces the residual of metal scrap in recycling cutting fluid, guarantees the cleanness of recycling cutting fluid, improves the filtration effect.

The application discloses an adjustable warehouse-dividing conveying and opening production line for water-jet non-woven fabric, which comprises two weighing machines, two mixing warehouses, and an adjustable conveying pipeline connecting the weighing machine group and the mixing warehouses; one end of a first conveying pipeline and a second conveying pipeline is respectively connected with different weighing machines, and the other end is respectively connected with different mixing warehouses; a reversing device is arranged on the second conveying pipeline; one end of a third conveying pipeline is connected with the weighing machine, and the other end is connected with the reversing device; the second conveying pipeline and the third conveying pipeline can be replaced with each other through the reversing device; the first conveying pipeline and the second conveying pipeline are combined to be used for fiber conveying, so that an AA surface double-layer structure can be formed; the first conveying pipeline and the third conveying pipeline are combined, so that an AB surface structure is formed; the reversing device is cut back to the second conveying pipeline, so that the AA surface double-layer structure can be quickly switched, the production line is convenient and fast, the addition of other auxiliary equipment is reduced, the cost and labor are reduced, the flexibility is high, and product diversification is achieved.

This invention discloses a method, apparatus, storage medium, and computer device for processing question-answering tasks, relating to the field of natural language processing technology. Its main objective is to address the problem of poor processing effectiveness in existing question-answering tasks. The method includes: upon detecting the execution of a question-answering task, parsing the question-answering information; retrieving a pre-trained question-answering recognition model based on the question-answering information (the model is trained by filtering prompts added to each network layer based on their importance); processing the question-answering information using the recognition model to obtain the recognition result of the question-answering task and acquiring evaluation information matching the recognition result; when there is prompt information matching the evaluation information that needs updating, updating the prompt information based on the prompt information to be updated, and adjusting the question-answering recognition model matched to the question-answering task based on the updated prompt information.

This application pertains to the field of waste battery recycling and discloses a method, apparatus, and product for recycling positive and negative electrode materials from waste lithium-ion batteries. Specifically, it involves pre-treating waste lithium-ion batteries to obtain a mixture of positive and negative electrode materials, and then mixing the mixture with a eutectic salt to obtain a mixture to be separated. The density of the eutectic salt is 2.5 g / cm³. 3 ~3.5g / cm 3 Within a certain range; the mixture to be separated is heated to above the eutectic point of the eutectic salt, the upper solid layer is collected to obtain regenerated negative electrode material, and the lower solid layer is collected to obtain regenerated positive electrode material. This application utilizes the eutectic salt with a density between the positive and negative electrode materials, which allows the negative electrode material to float and the positive electrode material to sink, thereby effectively achieving the separation and regeneration of positive and negative electrode materials from waste lithium-ion batteries. This is beneficial for subsequent reuse and has the advantages of simple process and low cost, making it suitable for mass production.

This invention discloses a wet-process phosphoric acid purification and arsenic removal system, arsenic removal process, and its application, relating to the field of wet-process phosphoric acid purification and impurity removal technology. The system includes a phosphoric acid feed tank, a Venturi jet reactor, a tubular scrubbing absorber, a reaction washing and ripening tank, and a hydrogen sulfide reactor connected in sequence. The hydrogen sulfide reactor is also connected to the Venturi jet reactor. An arsenic removal filter assembly is connected to the reaction washing and ripening tank, and this filter assembly is connected to the phosphoric acid feed tank. A purification and arsenic removal process and its application are also provided. The system has a compact design, reasonable layout, simple equipment structure, and low operation difficulty, effectively reducing the addition of sodium sulfide. The system is in a closed state, effectively controlling the safety risk of hydrogen sulfide leakage, resulting in high safety; the impurity removal efficiency is high. This solves the problem of existing arsenic removal systems having a large amount of sodium sulfide added, which easily leads to hydrogen sulfide leakage and low safety.

This utility model belongs to the field of pallet conveying technology and discloses a pallet lifting and stacking mechanism and an appearance inspection device. The pallet lifting and stacking mechanism includes a conveying component, a supporting component, and a lifting component. The conveying plate can move along a first direction and pass through a picking station and a stacking station. The conveying plate has a clearance hole and can carry the pallet. A first claw and a second claw are located at the stacking station and are spaced apart from the conveying plate to avoid the pallet moving along the first direction. The lifting component is located at the stacking station and at the bottom of the supporting component and the conveying plate. The supporting plate can move along a vertical direction and pass through the clearance hole to abut or dismount from the pallet and drive the pallet to move along a vertical direction. The first claw and the second claw are spaced apart along a second direction and can move in directions that are closer to or further away from each other to support or release the pallet. The first direction, the second direction, and the vertical direction are perpendicular to each other.

This invention relates to the field of microbial fermentation, and particularly to a recombinant yeast strain with dual functions of saccharification and liquefaction, its construction method, and its applications. This invention provides a recombinant yeast strain with dual functions of saccharification and liquefaction. Through the co-expression of high-activity α-amylase and saccharifying enzyme genes, it exhibits superior fermentation capabilities for both cooked and raw materials. Under both cooked and raw material fermentation conditions, it can increase the fermentation alcohol content of existing strains and reduce the addition of exogenous enzymes, enabling cost reduction and increased production of ethanol from bio-based raw materials, meeting the needs of large-scale industrial production.

The present invention relates to a recombinant microorganism comprising a metabolic pathway for the synthesis of P34HB (poly-3-hydroxybutyric acid (3HB)-4-hydroxybutyric acid (4HB) ester) wherein the proportion of 4HB is increased by attenuating the synthesis of 3HB, thereby reducing the addition of precursor substances, achieving the purpose that the strain can grow normally and produce a high proportion of P34HB.

The invention relates to a high-viscosity polymer coating and a preparation and use method thereof, and belongs to the field of polymer coatings, the coating comprises the following components: 60-80 parts of polymer resin, 15-25 parts of a waterproof filler, 3-8 parts of a waterproof additive, 5-10 parts of a diluent and 2-6 parts of a curing agent, high-solid-content resin is adopted, the addition of the diluent is reduced, and the mass ratio of a film-forming substance is greater than or equal to 85%; the preparation method comprises the steps of filler modification, raw material mixing, curing and the like. The application method sequentially comprises the steps of base layer cleaning, galling treatment, special prime coat brushing, carcass reinforcing material paving and surface coat brushing. The film forming compactness is improved through formula optimization, the adhesive force of the coating and a base layer is enhanced by combining base layer pretreatment and a matched construction technology, the phenomena of peeling and stripping / hollowing are effectively avoided, and the waterproof coating is excellent in waterproof performance, long in service life and suitable for waterproof engineering in the fields of buildings, building materials and the like.