22results about How to "Reduce oxidation loss" patented technology

The invention provides a preparation method of a high-temperature-resistant antioxidant chopped carbon fiber reinforced ceramic-based composite material, and relates to the field of ceramic-based composite material preparation, and the preparation method comprises the following steps: S1, selection and surface treatment of reinforced fibers: selecting chopped carbon fibers as a reinforced material, and carrying out surface modification treatment on the chopped carbon fibers to obtain the reinforced fibers; according to the present invention, the surface modification treatment is performed on the short carbon fiber, and particularly the SiC coating is coated on the fiber surface by using the chemical vapor deposition (CVD) method, such that the oxidation resistance of the carbon fiber under the high temperature condition is effectively improved. The coating enhances the stability of the fiber, reduces the oxidation loss of the fiber at high temperature, enhances the interface bonding force between the fiber and the ceramic matrix, and avoids stripping or interface failure in a high-temperature environment, thereby ensuring the overall stability and service life of the material.

The invention discloses a Fe-Ni-Co-based low-expansion high-temperature alloy bar and a preparation method thereof, and belongs to the technical field of high-temperature alloy preparation. Through the multi-channel rapid diffusion annealing process, the size and number of primary segregation phases are effectively reduced, favorable conditions are provided for precipitation of subsequent secondary phases, it is guaranteed that the bar has excellent strength and notch sensitivity resistance, and meanwhile the oxidation loss of the alloy bar is reduced; by controlling the multi-heating-number upsetting and drawing process, the density of the alloy bar is improved, a bar with 7-8-grade grains is obtained, the precipitation density of a secondary phase at a grain boundary is increased, and the strength of the bar is improved; through standard heat treatment, secondary phases are uniformly distributed in the grain boundary and the grain of the bar, and the strength, the notch sensitivity resistance and the performance stability are improved; by means of the method, the production efficiency can be improved, the energy consumption can be reduced, and the alloy bar with the uniform structure and the excellent comprehensive performance can be obtained.

The invention relates to a method for increasing the yield of a steel wire rod for a welding wire. The method comprises the working procedures of heating, temperature-controlled rolling and slow cooling which are carried out in sequence. Wherein the heating procedure comprises the step that a steel billet is subjected to sectional type heating, the temperature of a preheating section ranges from 700 DEG C to 800 DEG C, the temperature of a first heating section ranges from 760 DEG C to 840 DEG C, the temperature of a second heating section ranges from 890 DEG C to 970 DEG C, and the temperature of a soaking section ranges from 1000 DEG C to 1040 DEG C; the air-fuel ratio of the heating furnace is 0.7-1.0; the temperature-controlled rolling procedure comprises the steps that the steel billets obtained in the heating procedure are descaled through high-pressure water and then rolled into wire rods, then water cooling and spinning are conducted, and the descaling water pressure is larger than or equal to 22 Mpa; the initial rolling temperature is 950-990 DEG C, and the inlet temperature of a finishing mill is 900-950 DEG C; the spinning temperature is 940-960 DEG C; the slow cooling procedure comprises the steps that the steel wire rod obtained in the temperature control rolling procedure is slowly cooled on a Stelmor line and then enters a heat preservation vestibule for slow cooling, the temperature of entering the heat preservation vestibule ranges from 700 DEG C to 740 DEG C, the temperature of leaving the heat preservation vestibule is smaller than or equal to 300 DEG C, the heat preservation time of the heat preservation vestibule is larger than or equal to 120 min, and the produced steel wire rod for the welding wire is excellent in performance and high in yield.

The invention relates to the technical field of preparation of silicon carbide ceramics, in particular to an in-situ reaction sintered silicon carbide ceramic and a preparation method thereof.The preparation method comprises the following technological stages which are conducted in sequence: S1, preparation of silicon carbide slurry, specifically, organic matter precursor raw materials are weighed according to the mass content percentage to form the silicon carbide slurry; s2, vacuum grouting: injecting the silicon carbide slurry in the vacuum grouting tank into the shaping mold from the bottom of the shaping mold to form a silicon carbide green body; and S3, in-situ reaction sintering is conducted, specifically, the silicon carbide green body is placed in a sintering furnace, heating, heat preservation and cooling are conducted on the silicon carbide green body in the argon atmosphere through a segmented temperature control technology, and the silicon carbide ceramic is obtained. The silicon carbide ceramic prepared by the method disclosed by the invention has relatively high density and excellent mechanical properties.

The invention discloses a preparation process and method of a calf pellet feed for stimulating rumen development of calves, and relates to the technical field of livestock breeding. The raw materials of the pellet feed comprise a protein source, an energy source and a fiber source, and the pellet feed has the advantages that more than 90% of particles can pass through a 0.5 mm screen after the raw materials of the newborn calf feed are crushed, 70%-80% of particles can pass through a 1.5 mm screen after the raw materials of the 1-2-month-old calf feed are crushed, and the fiber source is treated, so that the particle size is reduced, and the particle size is reduced. Microbial fermentation is carried out, an ultrasonic-assisted technology is introduced, the fermentation temperature is strictly controlled to be 30-35 DEG C, the humidity is kept to be 60%-70%, and the fermentation time is 48-72 h, so that the fiber structure is optimized, the content of antinutritional factors is reduced, protein is moderately hydrolyzed, and the measures act together, so that the feed is easier to eat and digest by the calves, and the quality of the calves is improved. And the metabolism burden of the calves is relieved.

The invention discloses a sodium ion electrolyte applicable to high temperature and a preparation method thereof, and relates to the technical field of sodium ion batteries. The preparation method comprises the following steps: (1) dissolving sodium salt in a high-thermal-stability solvent, and fully dissolving in an oxygen-free environment to obtain a mixed solution; and (2) adding a high-temperature reinforcing agent, a film-forming agent and a flame retardant into the mixed solution in the step (1), and uniformly mixing to obtain the sodium ion electrolyte suitable for high temperature, wherein the high-temperature reinforcing agent is benzothiazole containing piperidine. The sodium ion electrolyte provided by the invention has good ionic conductivity, electrochemical stability and thermal stability under the condition of high temperature (80 DEG C). By improving the stability of the SEI film and reducing the oxidation loss of the electrolyte, the cycle index and the total service life of the battery in a high-temperature environment can be obviously increased (the capacity retention ratio after 500 cycles can reach 95.9% at most).

The invention discloses a smelting system atmosphere control method and device, and belongs to the technical field of metal smelting, and the control method comprises the steps that when atmosphere control is started, argon is evenly injected into the center of a smelting furnace in the circumferential direction of the top of a lining of the smelting furnace and evenly injected into the center of the smelting furnace in the circumferential direction of an observation hole in the center of a furnace cover; in the argon holding stage, argon is uniformly injected into the center of the smelting furnace only along the circumferential direction of the observation hole; when the observation hole is opened for object stretching operation, argon is evenly injected into the center of the smelting furnace in the circumferential direction of the top of the lining of the smelting furnace and evenly injected into the center of the smelting furnace in the circumferential direction of the observation hole. Atmosphere control in the whole smelting process can be achieved, argon can be evenly injected in the circumferential direction only through the observation holes in the argon maintaining stage, and argon waste is greatly reduced while atmosphere protection is achieved. And meanwhile, when the observation hole is opened, argon annularly injected from the observation hole is utilized to prevent external air from entering the furnace, so that the oxidation loss of smelting raw materials and melt is reduced.

The present application relates to the technical field of feed additives, and specifically discloses a process for spray-dried blood meal. A process for spray-dried blood meal comprises the following steps: (1) pretreatment: filtering fresh blood to remove residues for standby use; (2) adjusting pH: using sodium citrate buffer solution to adjust the pH value to 6.8-7.2; (3) spray drying: using a high-precision centrifugal pump to transport the adjusted blood into a spray tower for spray drying; (4) permeate treatment: dispersing the powder formed by spray drying in the permeate, treating at 25-30°C for 3-3.5h, centrifuging, drying at 30-35°C, and reducing the moisture content to 40-60%, and then performing variable temperature pressure difference puffing treatment; (5) coating: coating the powder formed by spray drying through a fluidized bed, and packaging and storage; In addition, the preparation method of the present application has the advantages of increasing the nutrient content and digestibility of the product blood meal.

The present invention discloses a fresh corn crushing system and a crushing and juice extraction method, wherein the crushing system comprises a feeding mechanism, a rolling conveyor and a corn kernel crushing device arranged in sequence according to the material flow direction; the rolling conveyor is provided with a conveying channel, and the rolling conveyor is used to allow the corn cob to enter the corn kernel crushing device in the conveying channel in a rolling motion; the corn kernel crushing device comprises a crushing channel, the inlet end of the crushing channel is smoothly connected with the outlet end of the conveying channel, a crushing opening is provided at the bottom of the crushing channel, a shot blasting mechanism for crushing the corn kernels on the surface of the corn cob is provided at the upper part of the crushing channel, and a corn cob collecting device is connected to the outlet end of the crushing channel. The crushing system of the present invention can complete the separation of corn kernels and corn cobs and the crushing of corn kernels in one step, thereby saving processing steps. The processing method based on the crushing system can directly crush fresh corn and keep it fresh during the processing.

This utility model discloses a rare earth wire feeding device, including a housing, a wire feeding assembly, a protective roller, a support roller, and a graphite shaft. The support roller is horizontally and longitudinally positioned on the left side of the middle of the housing, and a graphite shaft is horizontally positioned on the left end face of the support roller. The left end of the graphite shaft extends vertically out of the housing and then extends downwards at an angle to the left. A protective roller is vertically positioned on the upper end face of the support roller, and its upper end is connected to the top surface of the housing. A through hole I is vertically penetrating the upper surface of the housing relative to the position of the protective roller, and a wire feeding assembly is positioned on the upper surface of the housing relative to the through hole I. A channel I is coaxially penetrating the upper end face of the protective roller relative to the position of the through hole I. The lower end of channel I enters from the joint between the protective roller and the support roller, then exits in an arc shape from the joint between the support roller and the graphite shaft, and extends along the length of the graphite shaft out of its left end face, thereby performing the wire feeding operation. This utility model reduces the oxidation loss rate.

The invention provides a method for opening a new furnace by using high-silicon molten iron in a 120-ton dry dedusting converter, belongs to the technical field of steel smelting, and solves the problem that the difficulty of opening the new furnace by using the high-silicon molten iron in the existing dry dedusting converter is large. The method comprises the following steps: converter loading: loading molten iron and scrap steel into a 120-ton top-bottom combined blown converter; oxygen supply by the converter: igniting and supplying oxygen after the converter is loaded; the auxiliary materials are added for the first time after ignition, the auxiliary materials are added for the second time, the active lime is added in batches, and then the limestone and the active lime are added in batches; and converter end point control. According to the method, the converter quantity, the scrap steel quantity and the molten iron quantity are reasonably controlled, the complexity and uncertainty in the production process can be reduced, the stable molten pool depth of the converter in the smelting process can be ensured by accurately controlling the charging quantity, and therefore the production efficiency and the product quality are improved, the production cost is reduced, energy consumption is optimized, and the economic benefit is increased. Unnecessary energy consumption and waste generation are reduced, and environmental protection and sustainable development are facilitated.

The invention discloses a high-phosphorus steel electroslag remelting slag system and a smelting method, and belongs to the technical field of electroslag special metallurgy. The slag system comprises the following components in percentage by weight: 47 to 57 percent of CaF2, 32 to 40 percent of Al2O3, 4 to 6 percent of SiO2, 3 to 6 percent of 3CaO. P2O5, 1 to 2 percent of MgO and impurities. The smelting method comprises the working procedures of crushing before electroslag remelting, arc striking agent preparation, arc striking slag melting, remelting and the like. By adding 3 CaO. P2O5 into a slag system, phosphorus oxidation burning loss in the process of electroslag remelting of the high-phosphorus steel can be inhibited, the yield is stably controlled to be 95% or above, it can be guaranteed that electroslag ingots are uniform in component and structure, the subsequent machinability of materials is guaranteed, and the quality of the high-phosphorus steel is improved. The problems that in the prior art, the stability of electroslag system components is poor, the air permeability of the slag system is large, and the yield of alloy ingot elements is low are solved.

The invention relates to the field of food, and particularly discloses gum-based candies capable of improving the stability of B vitamins and a making method of the gum-based candies. The invention discloses gum-based candies capable of improving the stability of B vitamins. 100 parts of gum-based candies comprise the following raw materials in parts by weight: 17.5-23.5 parts of gum-based materials, 1-4 parts of a taste masking agent, 0.023-0.028 part of B vitamin capsules, 0.1-1 part of food coloring, 1-4 parts of edible acid and the balance of a filling agent, the B-group vitamin capsule is prepared from a core material and a wall material according to the mass ratio of 1: (2.3-2.5), the core material comprises B-group vitamin, and the wall material comprises konjac glucomannan, bacterial cellulose nanofiber and glycerol according to the mass ratio of 1: (0.02-0.04): (0.2-0.3). The gum-based candy is rich in B vitamins, and the B vitamins are good in stability, long in chewing time and good in viscoelasticity.

The utility model provides an ultrahigh-temperature-resistant furnace wall structure and a high-temperature continuous graphitization furnace. The ultrahigh-temperature-resistant furnace wall structure comprises a carbon fiber porous layer, a stacking layer, a heat preservation layer and a protective atmosphere assembly, and a stacking channel between the carbon fiber porous layer and the heat preservation layer is filled with the stacking layer; the protective atmosphere assembly comprises a protective atmosphere source, a protective atmosphere pipeline and an air inlet pipeline which are communicated in sequence, the air inlet pipeline penetrates through the heat preservation layer and abuts against the carbon fiber porous layer, and the air inlet pipeline is further provided with a side wall outlet communicated with the stacking channel; a plurality of mutually communicated air hole channels are formed in the carbon fiber porous layer, the air hole channels are communicated with the stacking channel and the air inlet pipeline, and the air outlet ends of the air hole channels are arranged on the side, away from the stacking channel, of the carbon fiber porous layer. The gaps of the stacked layers can reduce heat and reduce the heat resistance requirement of the heat preservation layer, the protective gas forms an air cushion protective layer on the surface of the carbon fiber porous layer, oxidation of the carbon fiber porous layer is reduced, and the service life of the carbon fiber porous layer is prolonged.

The utility model relates to the technical field of heavy ion generating devices, in particular to a metal ion generating device for an ECR (electron cyclotron resonance) ion source, which comprises an ion generating cavity, a microwave feed-in waveguide tube, a high-frequency high-temperature induction furnace, a communicating tube sleeve, a heating resistance furnace, a metal feeding box and a bias electrode. The microwave feed-in waveguide tube, the high-frequency high-temperature induction furnace, the communicating tube sleeve and the bias electrode are arranged at the ECR ion source injection end of the ion generation cavity in a penetrating manner; and one of the heating resistance furnace and the metal feeding box is arranged on the communicating pipe sleeve. According to the utility model, three metal ion generation methods of a new MIVOC method, a new high-frequency high-temperature induction furnace method and a new heating resistance furnace method are integrated, the crucible temperature of metal ions debugged by an ion source crucible method is increased, the temperature range of high-temperature refractory metal ions is widened to 100-3000 DEG C, the energy range of the metal ions is increased, the stability of a lead-out beam is maintained, the use efficiency of a terminal beam is improved, and the service life of the terminal beam is prolonged. And favorable conditions are created for the production of high-temperature refractory metal ions, and the requirements of users on the high-temperature refractory metal ions are met.

The application relates to the field of cupronickel materials, and particularly discloses a new type of cupronickel suitable for a MIM process and a forming process thereof. Metal powder raw materials include the following mass percentages: Ni 12-18%, Sn 0.6-1.0%, mixed lanthanum-cerium-praseodymium rare earth 0.6-1.0%, Cu 80.4-86.4%, and the balance of Fe and inevitable impurities. When the material is used as a whole, the oxidation resistance of the new material in a catalytic degreasing process can be significantly improved, and the material loss in a sintering process is also greatly reduced, so that the inherent shortcomings of traditional cupronickel are overcome, and various cupronickel products with complex shapes can be perfectly produced through the MIM technology.

The invention provides an ultraviolet catalytic decomposition device, a tail gas treatment device and a cross-linked tail gas treatment process, and particularly relates to the technical field of tail gas treatment. The ultraviolet light catalytic decomposition device comprises a shell and an ultraviolet light emitting device arranged in the shell, the ultraviolet light emitting device mainly comprises a low-pressure mercury lamp, a nitrogen pipe, a first quartz tube and a second quartz tube; each of the first quartz tube and the second quartz tube is of a structure of which one end is opened and the other end is closed; the first quartz tube is sleeved outside the low-pressure mercury lamp, the nitrogen tube is arranged in a gap between the first quartz tube and the low-pressure mercury lamp, and the second quartz tube is sleeved outside the first quartz tube. According to the ultraviolet light catalytic decomposition device disclosed by the invention, through the design of a double quartz tube structure and a built-in nitrogen tube, the photocatalytic efficiency is optimized, the operation safety is guaranteed, the service life of a light source is prolonged, the stability of ultraviolet light is ensured, and the stability of a reaction environment is maintained.

The invention relates to the technical field of steel rail shears, and discloses a multi-component alloy material for a movable steel rail shear tool and a preparation method, the multi-component alloy material comprises the following raw materials: 0.85-1.05% of C, 4.5-6.0% of Cr, 1.8-2.5% of Mo, 1.2-1.8% of W or V, 0.8-2.3% of Co or 0.4-0.8% of Co, 1.0-1.5% of Ni, 0.3-0.6% of Si, 0.4-0.8% of Mn, less than or equal to 0.02% of P, less than or equal to 0.015% of S, and the balance of Fe and inevitable impurities; according to the steel rail shear tool, through the synergistic effect of elements such as C, Cr, Mo, W, Co, V, Ni, Si and Mn, stable carbide is formed, a microstructure is optimized, the HRC of the steel rail shear reaches 58-62, the impact toughness is larger than or equal to 18 J, the impact toughness of the steel rail shear at the temperature of-40 DEG C is still larger than 15 J, and it is guaranteed that the steel rail shear can still be used in the high and cold environment (-40 DEG C); the steel rail shear is subjected to 1000 times of continuous shearing fatigue tests, the tipping rate is reduced to 0.5% or below, and the use reliability is high.

This invention relates to the field of plant extract preparation technology, and particularly to a low-oxalic acid, high-activity fresh purslane extract, its preparation method, and its applications. This invention uses freshly harvested purslane as raw material. Except for washing, the entire process of pulverization, enzymatic hydrolysis, filtration, and concentration does not require additional process water, directly producing a raw homogenate. After acidification, enzymatic hydrolysis with compound enzymes, enzyme inactivation, filtration, pressing, and oxalic acid removal, the extract is obtained through low-temperature vacuum oxygen-free concentration. This invention requires no organic solvents and can efficiently retain the total flavonoids, total polysaccharides, and phenolic acid active ingredients. The resulting extract contains ≥1.0% total flavonoids, ≥5.0% total polysaccharides, ≥30% solids, and ≤0.05% oxalic acid. This invention solves the problems of activity loss, dilution with added water, oxalic acid irritation, large oxidation losses, and unstable industrialization associated with traditional processes. The process is gentle and can be automated for mass production, making it suitable for cosmetics, personal care products, food, and functional foods.

The invention relates to the technical field of metallurgical industry, and discloses a converter oxygen consumption prediction method and device, electronic equipment and a storage medium, the method comprises the steps that target feature data and predicted feeding data of a target converter are obtained, the target feature data are determined according to preset influence factors, and the predicted feeding data are determined according to the preset influence factors; the predicted feeding data is obtained through prediction according to a preset feeding prediction model, oxygen consumption prediction is conducted on the target characteristic data and the predicted feeding data through a preset oxygen consumption prediction model, target oxygen consumption is obtained, and oxygen supply of the target converter is controlled according to the target oxygen consumption, the oxygen consumption prediction model is obtained by training a training data sample with an oxygen consumption label; by means of the method, the accuracy, stability and process change adaptability of converter oxygen consumption prediction are improved.

The present application relates to the technical field of pharmaceutical products, and specifically discloses a norepinephrine bitartrate injection and its preparation process. Every 10kg of the injection contains 25-45g norepinephrine bitartrate, 70-90g sodium chloride, 280-300g injection-grade soybean oil, 10-20g antioxidant microcapsules, and the remaining components are all base liquid, the base liquid is an aqueous solution treated with deoxygenation, and the antioxidant microcapsules include capsule core and capsule wall, the components of the capsule core include sodium pyrosulfite, and the components of the capsule wall include hydroxyethyl starch. The present application stores sodium pyrosulfite through antioxidant microcapsules, and sodium pyrosulfite can consume oxygen that enters the capsule core through the capsule wall. The capsule wall also isolates sodium pyrosulfite from norepinephrine bitartrate, reducing the possibility that norepinephrine bitartrate fails due to sulfonation reaction, which helps to improve the efficacy of norepinephrine bitartrate injection.

The invention relates to the technical field of petroleum coke, and discloses high-tap-density calcined petroleum coke and a preparation process thereof, the preparation process comprises raw material preparation, raw material inspection, raw material pretreatment, batching and calcination; by optimizing the raw material ratio and the preparation process, the tap density of the calcined petroleum coke can be remarkably improved. The tap density is an important index for measuring the material stacking compaction degree, and is of great significance for improving the use performance of the product and reducing the transportation cost. The reasonable raw material ratio and the scientific preparation process can ensure sufficient physical and chemical changes, such as discharge of moisture and volatile components, reduction of sulfur content, volume shrinkage and structural stability, of the petroleum coke in the calcining process, so that the tap density, the conductivity, the mechanical strength, the true density and the oxidation resistance of the petroleum coke are improved. The improvement of the performance is beneficial for improving the quality and stability of a final product.