60results about How to "Improve absorption rate" patented technology

This invention discloses a method for controlling sulfides in sulfur-containing gear steel, belonging to the field of metallurgical technology, including converter, LF refining, RH refining, and continuous casting processes. Converter process: molten steel tapping temperature 1630±20℃, carbon-oxygen product controlled below 0.0020; LF refining process: aluminum content in molten steel controlled at 0.035-0.045%, LF slag composition adjusted to R: 1.5-2.5, FeO+MnO: 1.0-2.0%; RH refining process: ferrotitanium added in one step to adjust the composition appropriately; Continuous casting process: argon-blown stopper rods and submerged entry nozzles are used for continuous casting, and 150-200 kg of low-basicity tundish covering agent is added to the tundish. The sulfur-containing gear steel produced by this invention can be continuously drawn for more than 10 heats, and the level of Class A inclusions can be stably controlled at A coarse ≤ 1.0 grade and A fine ≤ 1.5 grade, with a pass rate of over 99.9%.

This invention discloses a method for producing crop cultivation substrate using sugarcane filter mud and sugarcane pith as main raw materials, comprising the following steps: (1) dissolving and diluting 4,5-dihydro-4,5-dioxo-1H-pyrrolo[2,3-f]quinoline-2,7,9-tricarboxylic acid in water to obtain a solution; (2) mixing sugarcane slurry, sugarcane pith, the 4,5-dihydro-4,5-dioxo-1H-pyrrolo[2,3-f]quinoline-2,7,9-tricarboxylic acid solution, fermentation agent, and improver, adjusting the moisture content, and then composting and fermenting. The compost is turned over every few days and continuously composted and fermented for several days to obtain the crop cultivation substrate. The crop cultivation substrate produced by this invention is of excellent quality, allowing direct planting of plants without root burn. Therefore, this invention, using sugarcane filter mud and sugarcane pith as main raw materials to prepare and produce crop cultivation substrate, can effectively solve the problem of comprehensive utilization of sugarcane filter mud and improve product sales.

The utility model belongs to the technical field of tail gas treatment devices, and particularly relates to a tail gas absorption device of a stearate reaction kettle, which comprises a filter assembly for filtering gas and an adsorption assembly for adsorbing the gas, the filter assembly comprises a first shell, a first filter structure and a first material pipe, the first filtering structure is separably arranged in the first cavity and divides the first cavity into a gas cavity and a material cavity which are distributed up and down, one side of the gas cavity is connected with a first gas pipe, and the other end of the first gas pipe is communicated with the adsorption assembly. Compared with the prior art, direct contact between the discharging end of the reaction kettle and the outside atmosphere is changed into indirect contact through the filtering assembly and the adsorption assembly, tail gas leakage caused by direct tail gas suction is avoided, the tail gas absorption rate can be improved, on the one hand, solid-gas separation is conducted on products in the first cavity through the first filtering structure, and the product quality is improved. Therefore, the condition that a small amount of products are taken away during tail gas recovery is reduced.

This invention provides a low-cost, bimodal particle size distribution titanium-based powder for additive manufacturing, titanium-based parts, and a method for preparing the same. The method utilizes two different medium particle sizes D... 50 Using near-spherical titanium-based powder as raw material, a near-spherical bimodal particle size distribution titanium-based powder with good uniformity is obtained by wet mixing of suspension and rotary degreasing in a furnace. Various near-spherical bimodal particle size distribution titanium-based powders can also be prepared. The difference between these powders lies in the different particle size ratios and mass ratios of the two raw material powders used. The bulk density and flowability of each bimodal powder are tested to determine the range of particle size ratios and mass ratios of the two powders in near-spherical bimodal particle size distribution powders with high bulk density and flowability. This guides the preparation of high-quality near-spherical bimodal particle size distribution titanium-based powders for additive manufacturing. Ultimately, additive manufacturing technology is used to prepare high-performance, low-cost titanium-based parts to meet the stringent performance requirements of titanium components in high-end fields such as aerospace.

The utility model discloses a glass fiber reinforced plastic deodorization spray tower which comprises a supporting plate, a spray tower body is fixedly connected to the supporting plate, a water outlet is formed in the bottom end of one side of the spray tower body, a first valve is fixedly connected to the water outlet, and a filler layer is fixedly connected to the interior of the spray tower body. Spraying pipes are fixedly connected to the two sides of the top end in the spraying tower, a plurality of atomizing nozzles are fixedly connected to the spraying pipes, the spraying pipes penetrate through the spraying tower to be fixedly connected with a first three-way pipe, and second valves are fixedly connected to the spraying pipes. According to the device, water absorbing waste in gas is detected through a water quality detector on the detection assembly, whether the waste absorbed by the water reaches the maximum solubility of the waste in the water or not is detected, and if the waste can still be continuously absorbed, the water is fed into the spraying pipe through the water circulation assembly and sprayed out through the atomizing nozzle; therefore, cyclic utilization is achieved, and waste of water resources is avoided.

This invention belongs to the field of back-contact battery technology, specifically relating to a back-contact battery and its battery assembly with a specific front-side structure. This specific front-side structure includes a tunneling oxide layer and a specifically doped amorphous silicon layer sequentially disposed on the front side of a silicon substrate. Within the specifically doped amorphous silicon layer, a low-doped amorphous silicon layer, a high-doped amorphous silicon layer, and an oxygen-doped amorphous silicon layer are sequentially disposed along the direction away from the tunneling oxide layer. The specifically doped amorphous silicon layer is doped with phosphorus (P) and contains hydrogen (H). The P doping concentration C1 in the low-doped amorphous silicon layer and the P doping concentration C3 in the oxygen-doped amorphous silicon layer are both lower than the P doping concentration C2 in the high-doped amorphous silicon layer. This specific front-side structure enables the back-contact battery to achieve an absorption rate exceeding 85% for incident light within 400 nm. The back-contact battery of this invention maintains good performance even after long-term exposure to ultraviolet light, improving the battery's UV reliability while achieving high transmittance and high battery efficiency.

This invention relates to a tandem solar cell, its fabrication method, and its application. The tandem solar cell comprises a top layer of perovskite cells and a bottom layer of back contact cells stacked sequentially from top to bottom. The perovskite cells include a front glass layer, a first passivation layer, a perovskite composite layer, and a second passivation layer stacked sequentially from top to bottom. The perovskite composite layer includes at least two polar perovskite regions and perovskite electrodes disposed on both sides of each polar perovskite region in a first direction. The back contact cells include a back glass layer, a back electrode layer, and a crystalline silicon layer stacked sequentially from bottom to top. In the solar cell provided by this invention, the perovskite composite layer of the perovskite cell is designed with a specific structure using polar perovskite and perovskite electrodes to form a built-in electric field, driving the directional movement of electron-hole pairs to generate current. Combined with the introduction of the back contact cells, more solar radiation is received, thus improving the performance of the tandem solar cell.

The present application relates to waste gas treatment technical field, specifically to a kind of acrylic resin waste gas treatment filter equipment, including main body, the main body inside is equipped with purification cavity, the main body circumferential outer wall is fixedly connected with shunt pipe, the shunt pipe bottom is equipped with several air pipes, the air pipe bottom end is penetrated to the inside of purification cavity;The inside of the purification cavity is provided with purification device, the purification device includes rotation installation in the center position of the inside bottom of purification cavity drive shaft, the inside of the purification cavity is located at the top position of drive shaft and is provided with limit frame, the center position of the limit frame bottom is penetrated and is equipped with docking interface.This application is through gas distribution plate, push plate and filter assembly linkage, to establish gas-liquid mixing neutralization system, improve the neutralization of acidic substances and the absorption efficiency of soluble VOCs, reduce the subsequent pollutant load, push plate, filter assembly and other collaborative impurities, clean filter screen, prevent secondary pollution, prolong the service life of filter material.

The application discloses an integrated stretchable flexible wearable biosensor and a preparation method thereof, and belongs to the technical field of electrochemical sensing.The integrated stretchable flexible wearable biosensor is wrapped by a PAN / SiO2 sweat absorption layer.The method comprises the following steps: preparing a stretchable conductive composite fiber; preparing an integrated stretchable flexible sensing fiber; preparing a PAN / SiO2 sweat absorption layer; and preparing a sensor.The conductive composite fiber in the application can maintain stable performance under multiple bending and twisting, the sensor is integrated with a flexible integrated circuit chip and a flexible power supply device to obtain a fabric sensing system, the fabric sensing system can process acquired sensor data, and the detection data can be uploaded to a mobile terminal and a cloud end in real time through Bluetooth technology, real-time monitoring and management of a health condition of the biosensor are realized, six specific biomarkers can be efficiently detected by using only 1 muL of sweat, the amount of sweat required for activating the biosensor is 1 / 3 of that of the prior art, and the fabric sensing system can easily adapt to a tensile strain caused by exercise.

The invention belongs to the technical field of agricultural nano materials, and particularly relates to a metal-loaded phosphorus-doped carbon quantum dot as well as a preparation method and application thereof. The preparation method provided by the invention comprises the following steps: mixing citric acid, a phytic acid aqueous solution, an amine substance, water and soluble metal salt, and carrying out chelation adsorption to obtain a polymer quantum dot mixed solution containing metal ions; and carrying out hydrothermal reaction on the polymer quantum dot mixed solution to obtain the metal-loaded phosphorus-doped carbon quantum dots. The metal-loaded phosphorus-doped carbon quantum dots obtained by the preparation method provided by the invention are high in metal loading capacity, high in coordination stability, excellent in stability in soil with different pH values, and environment-friendly.

This invention discloses an integrated ultra-wideband absorbing material. From top to bottom, the material comprises a first lossy dielectric substrate, multiple lightweight interlayers, five resistive frequency selective surfaces, a metal backplate, and a composite material frame penetrating between the layers. Through slots are formed between the square rings and concentric geometric patterns of each resistive frequency selective surface. The composite material frame is embedded in these slots and continuously arranged along the thickness direction, creating a non-uniform dielectric structure within the material composed of high-dielectric and low-dielectric regions. This structure jointly regulates the resonance conditions and equivalent impedance gradient of the multiple resistive frequency selective surfaces, shifting the low-frequency absorption initiation frequency towards lower frequencies without increasing the thickness, and maintaining stable absorption performance at large oblique incidence angles. Simultaneously, the composite material frame improves the overall structural mechanical stability. This invention achieves thinness, wide bandwidth, and wide-angle absorption characteristics, making it suitable for electromagnetic stealth and electromagnetic compatibility applications.

The invention relates to a fertilizer synergist and a preparation method thereof, in particular to a fertilizer synergist which is based on natural components such as modified aspartic acid, alginate oligosaccharide, mannan oligosaccharide and magnetic polysaccharide and takes a fertilizer as a carrier. According to the fertilizer synergist, through the innovative modification of the modified aspartic acid and the synergistic effect of the natural polysaccharide, the utilization efficiency and the slow release property of a fertilizer and the nutrient absorption capacity of crops are remarkably improved. Compared with the traditional fertilizer synergist, the synergist disclosed by the invention can prolong the release time of nutrients, reduce the loss of the fertilizer and improve the yield of crops, has better environmental friendliness, and reduces possible pollution to soil and water in the fertilizer application process. The fertilizer synergist disclosed by the invention has remarkable advantages in the aspects of improving the fertilizer utilization rate, crop growth and soil environmental protection. The fertilizer synergist provides an efficient, environment-friendly and sustainable technical solution for agricultural production.

The invention discloses a composite extract for improving sleep and a preparation method thereof, and belongs to the technical field of plant extraction. According to the invention, four medicinal materials of spina date seed, lily, lotus seed and poria cocos which are homologous in medicine and food and have the effect of soothing the nerves are scientifically combined, and the composite extract for improving sleep is obtained by adopting a specific extraction process; according to the technology, active ingredients are efficiently released through the synergistic effect of cellulase, pectinase and acid protease, and the yield of gamma-aminobutyric acid and other sedative substances is remarkably increased through a co-fermentation system of lactobacillus plantarum and saccharomyces cerevisiae; lipid-soluble effective components are extracted by adopting glycyrrhizic acid and rhamnolipid assisted ultrasonic extraction technology, and finally, embedding protection of the active components is realized through a chitosan oligosaccharide-soybean lecithin system, so that thermal degradation and oxidation loss in the processing process are reduced, and compared with a traditional single extraction method, the preparation method has the advantages that the cost is reduced; according to the method, high-yield gamma-aminobutyric acid, jujuboside, triterpenic acid and other active ingredients can be obtained at the same time, and the effect of the composite extract is improved.

The invention discloses a preparation method of an anti-aging and life-prolonging cell nutrient rich in natural antioxidants for pets, and belongs to the field of nutritional supplements for pets. The preparation method comprises the following steps: firstly, mixing blueberry powder, broccoli powder, carrot powder, spinach powder, pomegranate extract, green tea extract, curcumin, fish oil, vitamin E, vitamin C and water according to a specific proportion; then, carrying out composite enzymolysis treatment, and fully releasing active substances in plant cells by using a synergistic effect of cellulase and pectinase; then, the enzymatic hydrolysate is fermented by lactic acid bacteria, nutritional ingredients are converted, and flavor substances are generated; then, lecithin is added for high-speed shearing, homogenizing and emulsifying, and stable emulsion is formed to protect fat-soluble components and improve physical properties; and finally, preparing a final product through an optimized spray drying process. According to the method, through scientific compatibility of raw materials and targeted process optimization, the problems of insufficient release of active ingredients, poor stability, low bioavailability, poor palatability and the like in the prior art are solved.

The utility model relates to the field of aviation technology, concretely relates to a novel airplane seat with double functions of shock absorption and anti-crash, which comprises a seat back, a seat cushion and an energy absorption structure, the seat back is connected with the seat cushion, the energy absorption structure comprises horizontal wave springs, vertical wave springs and a partition, the horizontal wave springs comprise a plurality of wave spring units stacked together, each wave spring unit is composed of two wave-shaped plate bodies stacked and fixed, and each wave-shaped plate body is a continuous sinusoidal structure, the utility model integrates the functions of shock absorption and anti-crash in the same seat structure, in daily flight, the seat realizes the shock absorption function through the energy absorption structure, effectively buffers the vibration and improves the comfort of passengers, in a crash accident, the energy absorption structure absorbs energy and buffers through deformation, significantly reduces the impact force on passengers and improves the safety performance and applicable scenarios of the seat.

This invention belongs to the field of biomedical and health care technology. Specifically, this invention relates to a composition of metabiotics and calcium salts and its application. Our unit unexpectedly discovered, through extensive research, that *Lactobacillus delbrueckii* subsp. bulgaricus Lb-87 (… Lactobacillus delbrueckii subsp. Bulgaricus Lb-87 (a metabiotic) can synergistically work with calcium salts to significantly improve the absorption rate of calcium ions in the body, thereby effectively promoting calcium utilization and maintaining normal physiological functions. This discovery provides a new technical path and solution for developing foods, pharmaceuticals, health foods, and dietary supplements with highly efficient calcium absorption-promoting functions and multiple effects.

This application relates to the technical field of textile auxiliary agent synthesis, and in particular to a nylon softener and its preparation method, which is prepared from the following components by weight percentage: 10%-20% nylon silicone oil, 0.3%-1.0% pH adjuster, 1.0%-3.0% anti-coagulation agent, and deionized water to make up the balance to 100%. This application improves the bonding strength between the prepared nylon softener and nylon fabrics by modifying the nylon silicone oil with an organic amine similar in structure to nylon fibers, while also increasing the absorption rate of the nylon softener by the nylon fibers. Furthermore, the nylon softener exhibits good stability and dispersibility, resulting in better softness properties for novel nylon fabrics.

The application discloses an ultrablack coating with wide-angle absorption and a preparation method and application thereof, and belongs to the technical field of ultrablack coatings and preparation thereof. The application solves the problem that the existing ultrablack coating cannot present extremely low scattering and high absorption under large-angle incident light. In the application, carbon black is used as an absorbent, a high-temperature-resistant silica sol solution is used as a binder, and a one-step sintering method is adopted to form a stable structure and construct an ultrablack coating with a forest-like light trap array structure. The forest-like array structure on the surface of the ultrablack coating significantly changes the refractive index of the coating surface, thereby reducing the surface optical reflection; the surface forest-like light trap structure is closely arranged, can make the light incident from each angle to reflect back and forth in the structure, and then maximally absorbs the incident light, realizes stable high light absorption under wide angles, makes the reflectivity of the ultrablack coating not obviously change with the angle of incident light, and improves the deep space exploration precision of a space optical system.

This invention discloses an ultrafine organic calcium supplement solid beverage and its preparation method. It comprises a carrier powder derived from natural plants, ultrafine organic calcium source powder, and ultrafine low glycemic index sweetener powder. The particle size distribution of the organic calcium source ultrafine powder is D90≤10μm. All three components form a uniform mixed powder system. This invention significantly increases the specific surface area of ​​the calcium powder through physical ultrafine pulverization technology. Combined with a specific dry mixing process, it solves the technical problems of existing calcium supplement beverages, such as complex formulations, high calcium source irritation, uneven raw material dispersion, and poor reconstitution performance. The product formula of this invention is extremely simple and pure. Using an organic calcium source, it can be efficiently absorbed without the participation of gastric acid, is gentle and non-irritating to the stomach and intestines, and has a smooth, clumpy taste after reconstitution. Its preparation method is simple, energy-efficient, and easily scaled up industrially. The resulting solid beverage is suitable for all age groups, especially children, people controlling their blood sugar, and middle-aged and elderly people with sensitive stomachs, as a daily dietary calcium supplement.

This invention discloses a nutritional composition and preparation method for improving joint health in senior pets. The nutritional composition comprises: N-acetylglucosamine, chondroitin sulfate, methanesulfonylmethane, unsaponifiable avocado and soybean extract, hyaluronic acid, curcumin microcapsule powder, and high-concentration fish oil. This invention uses a lipid / polysaccharide bilayer microcapsule structure to encapsulate curcumin and fish oil, and prepares the product through low-temperature homogenization, spray drying, and granulation processes. The composition of this invention works synergistically through multiple pathways, simultaneously exerting effects on three key levels: anti-inflammation, lubrication, and cartilage repair. It can significantly inhibit joint inflammation, improve joint lubrication, and promote cartilage repair. This invention solves the problems of existing pet joint products, such as single pathways of action, low stability and bioavailability of lipid-soluble active ingredients, and lack of overall formulation optimization tailored to the characteristics of aging pets. It is suitable for daily joint health maintenance or adjunctive treatment in middle-aged and senior dogs and cats.

The application discloses a solar cell, a laminated cell and a photovoltaic module. The solar cell comprises a silicon substrate; the silicon substrate comprises a first surface and a second surface arranged oppositely, and the first surface comprises first regions and second regions distributed at intervals; the surface height of the silicon substrate at the first regions is lower than the surface height of the silicon substrate at the second regions, so that a step portion is formed at the junction area of the first regions and the second regions; an electrode structure is further arranged on the first surface, the electrode structure corresponds to the second regions and extends to the step portion; blind groove structures are distributed on the step portion and are arranged in a direction parallel to the thickness direction of the silicon substrate. The preparation method of the solar cell piece of the solar cell improves the interface of the step portion region, reduces the optical loss at the edge of the cell, improves the light absorption efficiency and improves the conversion efficiency of the solar cell piece.

This invention belongs to the field of fiber material technology, and relates to a composite fiber containing nano-natural tea fiber, its preparation method, and its application. The raw materials for preparing the composite fiber include nano-natural tea fiber and basic fiber pulp, wherein the nano-natural tea fiber is a yerba mate nanofiber microemulsion. This invention integrates nanotechnology into the preparation of natural tea fiber. The microemulsion method allows for the simultaneous and uniform dispersion of multiple effective components from tea leaves in the yerba mate nanofiber microemulsion, effectively showcasing the multifunctionality of the fabric. The microemulsion system exhibits high uniformity and long-term stability, eliminating the need for additional surfactants during spinning to achieve high dispersion of the nano-tea fiber in the spinning solution, ensuring the long-lasting effectiveness of the resulting functional fabric. Furthermore, yerba mate contains abundant tea polyphenols and unique yerba mate alkaloids, which further enhance the overall performance of the composite fiber.

The application discloses a special feed for fattening pigs rich in functional amino acids, which comprises the following components in parts by weight: a core functional amino acid composition 3-5 parts, a low-soybean meal multi-protein matrix 60-70 parts, a nutrition synergistic component 20-25 parts, an anti-nutritional factor degradation agent 1-2 parts, and a micro-ecological and plant extract component 1-2 parts. A preparation method comprises the following steps: obtaining the low-soybean meal multi-protein matrix by pretreating raw materials; preparing the core functional amino acid microcapsule; mixing the basic materials and then performing low-temperature section granulation; after cooling, mixing the micro-ecological and plant extract component at low temperature; and finally screening and removing impurities and unqualified particles to obtain the finished product. The application optimizes the amino acid ratio and the preparation process, protects the activity of the amino acids, adapts to different growth stages of the fattening pigs, improves the growth performance and carcass quality, improves the raw material digestion rate, reduces nitrogen emission, and has strong applicability.

The application discloses a high-entropy alloy coating special for blue laser cladding and a preparation method thereof. (1 x) Ti x , and x is in the range of 0.25-0.75. The preparation method comprises the following steps: substrate pretreatment, alloy powder proportioning and ball milling mixing, and blue laser cladding. The application realizes the synergistic regulation of alloy phase composition and microstructure by Al and Ti elements, forms a FCC+BCC dual-phase structure, has fine and uniform grains, and is free of macroscopic cracks, and the precipitation of intermetallic compounds is significantly inhibited. The coating and the substrate are metallurgically combined, have high hardness, excellent wear resistance and corrosion resistance, the application fully utilizes the advantages of high blue laser energy absorption rate, stable molten pool and fast cooling rate, solves the problems of cracks, segregation and poor forming in infrared laser cladding, and is suitable for surface strengthening and remanufacturing in the fields of marine engineering, molds, aerospace and the like.

This invention belongs to the field of medicinal chemistry, specifically relating to a crystalline form of lasmidetane-1-hydroxy-2-naphthoic acid and its preparation method. The crystalline form exhibits characteristic peaks at least at 10.24±0.2°, 14.65±0.2°, 21.53±0.2°, 21.98±0.2°, 23.70±0.2°, 26.44±0.2°, and 27.09±0.2° in its 2θ X-ray diffraction pattern under Cu-Kα radiation. The crystalline form consists of two molecules of lasmidetane and two molecules of 1-hydroxy-2-naphthoic acid as its basic unit. This crystalline form improves the solubility of lasmidetane, solving the problem of limited formulation development due to its low solubility. It is suitable for the development of various formulations, providing a foundation for improving drug efficacy and patient compliance.

The invention discloses a display panel and a display device. The display panel comprises a substrate, a light conversion layer, a reflection function layer and a plurality of light emitting devices. The light-emitting device is arranged on one side of the substrate; the light conversion layer is arranged on the side, away from the substrate, of the light-emitting devices, and the light conversion layer comprises a plurality of light conversion units corresponding to the light-emitting devices respectively; the reflection function layer is located on the side, away from the substrate, of the light conversion layer, and the reflection function layer is configured to reflect part of light rays emitted by the light conversion unit. The use performance of the display panel is improved.

The present application relates to the technical field of cigar tobacco processing, and particularly relates to a method for preventing mildew of fermented cigar tobacco. The method comprises the following steps: first, spraying a rhamnolipid solution to the surface of the cigar tobacco, and then placing the cigar tobacco in a constant temperature and humidity environment for fermentation. In the present application, the rhamnolipid is mainly used to achieve the mildew prevention effect, and the mechanism is mainly to damage the cell wall and cell membrane. Both fungi and bacteria have cell walls and cell membranes, so compared with natamycin in the prior art which can only act on fungi, the present application has higher mildew prevention effect.

A spheroidizing inoculation device for centrifugal casting of molten iron of a nodular cast iron pipe comprises a sprue cup, a throat pipe, a runner and a molten iron casting device, the bottom of the sprue cup is connected with the throat pipe, an outlet of the throat pipe is connected with the runner, and a wire feeding device and the molten iron casting device are arranged above the sprue cup; the molten iron pouring device comprises a molten iron ladle and a molten iron pouring mechanism, and the molten iron ladle is connected with the molten iron pouring mechanism. In the centrifugal casting process of the nodular cast iron pipe, a nodulizing inoculant is fed into the throat pipe through a core-spun yarn, molten iron is continuously fed into the core-spun yarn when entering the throat pipe, a nodulizing agent enters the throat pipe along with the molten iron, and the molten iron carries the nodulizing agent to absorb the nodulizing inoculant in the process of flowing through the throat pipe to achieve nodulizing inoculation. The nodulizing inoculant is absorbed in the throat pipe in the process of flowing along with iron liquid in a cored wire mode, nodulizing inoculation along with flow is achieved, the absorptivity of the nodulizing inoculant is improved, the nodulizing technological process is shortened to the maximum extent, and nodulizing decline is avoided.

The invention provides a method for preparing nano calcium carbonate through amine cycle by capturing carbon dioxide through ferronickel slag, and belongs to the technical field of waste resource utilization and carbon dioxide capture and utilization. The method comprises the following steps: mixing ferronickel slag powder with an ammonium chloride solution, and performing leaching reaction to obtain a mixed solution; adding ammonium hydroxide into the mixed solution to adjust the pH value, and filtering to obtain a leaching solution; introducing the flue gas into an ammonia water absorption tower to prepare an ammonium bicarbonate solution; the ammonium bicarbonate solution and the leachate are subjected to a carbonization reaction, nano calcium carbonate is obtained, ammonia gas generated by the carbonization reaction is recycled to an absorption tower to be reused, and a closed amine circulation system is formed. According to the amine circulation method, efficient utilization of CaO in the ferronickel slag can be achieved, meanwhile, CO2 in the flue gas is captured, the purity of obtained nano calcium carbonate is larger than or equal to 93%, the whiteness is larger than or equal to 94%, the nano calcium carbonate has the advantages of being small in particle size, good in dispersity and high in additional value, and cooperative utilization of high-additional-value recycling of the ferronickel slag and carbon dioxide emission reduction is achieved.

The invention is applicable to the field of additive manufacturing, and provides a multi-laser intelligent thermal management and wavelength stabilization system for forging and printing equipment, which comprises a central thermal management unit, a graded temperature control cooling loop, a thermally induced deformation real-time compensation system and a wavelength locking and monitoring system, the central heat management unit is electrically connected with all the systems and communicates with a forging and printing equipment upper computer. The graded temperature control cooling loop comprises a first-stage water cooling machine and a second-stage precise temperature control module which are connected in series, so that + / -0.1 DEG C precise temperature control is realized; the thermally induced deformation real-time compensation system monitors light beam parameters through a spectroscope and a light beam quality analyzer, and compensates a thermal lens effect in cooperation with a beam expander; the wavelength locking and monitoring system monitors the wavelength by using a spectroscope and a micro spectrometer, and realizes the stability of the wavelength within + / -0.5 nm in combination with secondary temperature control; the problems of multi-laser thermal runaway, light beam quality degradation and wavelength drift are solved, the forging printing precision is improved, the service life of equipment is prolonged, and the method is suitable for machining of metal components such as titanium alloy and copper materials.