64results about How to "Efficient process" patented technology

This invention belongs to the field of cosmetic raw material preparation technology, specifically relating to a method for preparing a low-odor Xinjiang Lithospermum extract, its product, and its application. The method includes: raw material pretreatment: drying and pulverizing Xinjiang Lithospermum raw material to obtain pretreated material; first-stage extraction: loading the pretreated material into a supercritical fluid extraction device, adding a composite entrainer for extraction, and collecting the first fraction in a first separator; second-stage extraction: collecting a second fraction rich in naphthoquinone components in a second separator; and post-treatment: concentrating the second fraction and removing the alcohol solvent to obtain the low-odor Xinjiang Lithospermum extract. This invention can separate and discard most of the odor-causing volatile components in the raw material under mild conditions in the first stage, and then efficiently extract the core active substances of naphthoquinone in the second stage, achieving a significant reduction in the odor of the extract and a significant improvement in its sensory quality.

The invention belongs to the technical field of metal separation, and particularly relates to a deep eutectic solvent, a preparation method and application thereof, and a method for selectively extracting lithium from a lithium battery positive electrode material. According to the deep eutectic solvent provided by the invention, nearly 100% selective leaching of lithium is realized in an extremely short time, and Ni, Co and Mn are almost not leached, so that the bottleneck that the rate and the selectivity are difficult to obtain at the same time in a traditional method is broken through; and the process conditions are mild and efficient, are far superior to the traditional process and are more suitable for practical industrial application, and the energy consumption and material consumption are remarkably reduced.

The invention discloses a lactobacillus delbrueckii subsp. Bulgaricus CCFM1520 for transforming curcumin to produce tetrahydrocurcumin to relieve nervous anxiety, and belongs to the technical field of microorganisms. The lactobacillus delbrueckii subsp. Bulgaricus CCFM1520 screened by the invention has the capability of converting curcumin, and can utilize curcumin and generate tetrahydrocurcumin. The invention further provides a synbiotic preparation prepared from the lactobacillus gasseri CCFM1481 and curcumin, the synbiotic preparation can be used as an anti-fatigue functional medicine, the individual behavioral memory level can be improved, the imbalance of body neurotransmitters (DA, 5-HT and NE) can be slowed down, the expression of body neuroprotection related genes (BDNF, TrkB, DRD1 and TH) can be improved, and the synbiotic preparation has a huge application prospect.

The application discloses a fishing device used in the technical field of phosphating, which comprises a first hook, a second hook and a third hook, the first hook is connected with the second hook and the third hook, the third hook is connected with the first hook and the second hook, the top of the first hook, the second hook and the third hook is connected with a traction part, the traction part is used for pulling the first hook, the second hook and the third hook, when the force applied on the first hook by the traction part is greater than the force applied on the second hook and the third hook, the first hook vertically rises, the second hook and the third hook downwardly incline, and the second hook and the third hook are fixed from the side or the bottom of the hanging object by the downward inclination of the second hook and the third hook.

The present application discloses a viscous liquid filling machine for online cleaning by using reset time, aiming at solving the problem that the feeding pipeline cleaning of the existing viscous liquid filling machine needs to be stopped, cannot be cleaned online, and is prone to cause pipeline blockage and delay production due to untimely cleaning. The present application is based on a following type filling machine, a scraping ring is arranged in the hose connecting the raw material bin and the quantitative cylinder, the movement gap of the filling mechanism in the reset section of the annular electric slide rail is utilized, the scraping ring is driven to move up and down along the hose by the cable driven by the first and second electric winding mechanisms, the viscous material adhered to the inner wall of the hose is scraped off, and the online cleaning of the hose is realized. The cleaning process does not need to stop, does not occupy production time, and does not need to be washed with water, avoiding the problem that the material is diluted by water, cleaning is more thorough, effectively preventing pipeline blockage, and improving the filling production efficiency.

The present invention provides a thiamine sulfate crystal and an extraction method thereof, and relates to the technical field of thiamine sulfate purification, and the extraction method comprises the following steps: thiamine thiosulfate is oxidized by hydrogen peroxide to obtain an oxidation liquid, and the oxidation liquid is added into an organic solvent for crystallization and separation to obtain the thiamine sulfate crystal; the organic solvent comprises at least one of methanol, ethanol and acetone. According to the extraction method, the specific organic solvent is adopted to crystallize the thiamine sulfate, high-purity thiamine sulfate crystals can be extracted from the aqueous solution oxidized by thiamine thiosulfate, the purity can reach 99.70% or above, and the process is simple, efficient and suitable for industrial production.

This invention discloses a torque and durability testing system for bolts used in new energy vehicles. The system includes a clamping module for clamping and testing sample bolts. The clamping module includes a clamping tool comprising a main board and a sub-board. It also includes a durability fatigue testing module for simulating the environmental conditions encountered by the battery pack during actual operation of new energy vehicles, thereby improving testing accuracy. The durability fatigue testing module includes a vibration unit, a heating unit, a resonant unit, and a problem collection unit. This solution improves the accuracy of bolt torque and durability testing by simulating the environment encountered by the battery pack during actual operation of new energy vehicles. Furthermore, by separating and integrating these tests, it further improves the accurate identification of bolt defects. The added environmental simulation does not require excessive cost, effectively improving the overall efficiency and accuracy of the testing system.

The application discloses a kind of preparation and application of lime key component extract with the effect of relieving psychological stress, belong to medical technical field.The application uses Rutaceae citrus plant lime as raw material, and water phase crude extract is prepared by washing and juicing, and the residue is extracted by ultrasonic-assisted ethanol to obtain alcohol phase extract, the two phases are combined and concentrated under reduced pressure, then purified by D101 macroporous resin, to obtain extract rich in active ingredients such as tangeretin, geniposide B, neohesperidin, etc.The application has simple process and high extraction efficiency, and the obtained extract is natural in origin and safe in composition.Animal experiments have verified that the extract can significantly improve anxiety-like behavior caused by stress, and the effect of relieving psychological stress is better than that of single hesperidin, and it can also effectively improve abnormal weight loss caused by stress, regulate the level of inflammatory factors in the body, and balance psychological relaxation and physiological protection.The application fills the application gap of lime in the field of psychological stress relief, and provides a new scheme for developing natural and safe stress relief products.

The application discloses a kind of AI auxiliary design hybrid acyltransferase mutant and its amide synthesis application.The mutant is to come with VIII carboxylic esterase hybrid acyltransferase EstCE1 as wild type, and is obtained by introducing combination mutation M1A, L155T and F245S, and its amino acid sequence is shown in SEQ ID NO:2.Compared with wild type, the amide activity of mutant in the application is increased to 17.5 times, catalytic efficiency (k cat / K m ) is increased to 16.7 times, while hydrolysis activity is significantly inhibited.The mutant can be catalyzed to synthesize p-acetylaminophenol in aqueous system with ethyl acetate as acyl donor and p-aminophenol as acyl acceptor, and the conversion rate is 4.07% in 10 hours, which is increased by 30.5 times compared with wild type.The mutant provided by the application has the advantages of high catalytic efficiency, low hydrolysis side reaction and mild reaction conditions, and has wide application prospect in the field of green synthesis of amide drugs.

This invention discloses a cleaning method, cleaning system, and application for precision filters. The cleaning method includes the following steps: coarsely washing the emptied precision filter with an organic solvent; washing the coarsely washed precision filter with water to remove the organic solvent; after washing, draining the wash water from the precision filter to fill it with water, then heating to perform deep hydrolysis treatment on the gel impurities adhering to the precision filter; after the deep hydrolysis treatment is completed, draining the decomposition liquid from the precision filter; washing with water, and drying to complete the cleaning of the precision filter. This invention's cleaning method uses water for deep decomposition treatment to replace the existing alkaline washing process, achieving efficient decomposition of GPAN, with good cleaning effect, low solid waste generation, and low corrosivity. This invention further improves the water-based deep decomposition treatment process, proposing a reflux self-circulation deep decomposition treatment process and a forced circulation deep decomposition treatment process to further improve the cleaning effect.

The invention discloses a construction method and application of a chlamydomonas reinhardtii source high-sweetness induced protein variant engineering algal strain. The preparation method comprises the following steps: firstly, modifying and optimizing protein coding sequences of sweet taste induction proteins Miraculin and Neoculin, so as to obtain optimized gene sequences of CrMiraculin and CrNeoculin; the method comprises the following steps: firstly, preparing a Chlamydomonas reinhardtii strain, then cloning the Chlamydomonas reinhardtii strain into an expression vector pGM6, constructing a recombinant expression vector, introducing the recombinant expression vector into the Chlamydomonas reinhardtii wild strain, and screening by using a paromomycin resistance marker carried by the vector to obtain a transformed strain. The obtained engineering algal strain can stably inherit and efficiently express the target sweet induced protein, and the chlamydomonas reinhardtii algal powder rich in the CrMiraculin and CrNeoculin sweet induced protein is obtained by performing fermentation culture on the engineering algal strain. Finally, through protein purification and mixing with acidic substances, sour taste can be induced to be converted into sweet taste, so that the method has great application potential in the fields of foods, seasonings or health-care products.

The application provides a red-observed blue derivative, a preparation method and application thereof, and the red-observed blue derivative has a structure shown in formula I. The red-observed blue derivative of the application introduces a trimerized cyan chloride group on the basis of an observed blue mother nucleus, and can make the compound emit red light. In the preparation method of the compound of the application, the reaction substrate is an environmentally-friendly and safe observed blue, and the reaction product has high purity and high yield. The process is efficient and low in cost.

This utility model relates to the field of metal processing technology, specifically to a slag cleaning device for laser cutting machines, designed to solve the problems of low efficiency, poor safety, and insufficient adaptability of manual slag cleaning. The device includes two mounting plates connected by a sliding structure. A grooved scraper is installed below each mounting plate, the groove engaging with a serrated support strip. The drive assembly includes a drive wheel with a positioning column, fixed to both ends of a telescopic rod I. The telescopic rod I is connected to a synchronous wheel I via a driven wheel. The synchronous wheel I drives a smaller diameter synchronous wheel II via a synchronous belt, causing the turntables at both ends of the telescopic rod II to rotate. Driven by the eccentric fixed column I and the L-shaped connecting plate, the scraper periodically oscillates to remove the slag. The mounting plate spacing is adjusted via a screw-adjustable guide rod and an internally threaded tube, adapting to different serrated strip spacings. This device achieves simultaneous movement and slag scraping, improving cleaning efficiency and versatility.

The invention discloses peptizing equipment and a sheet cutting system and method.The peptizing equipment comprises an irradiation device and a sheet cutting device, the irradiation device comprises a box body and a light source arranged in the box body, an opening is formed in the top of the box body, and the light source faces the opening; the carrying device comprises a first module and a first end effector in transmission connection with the first module; by means of the first module, the first end effector is suitable for grasping a wafer or a wafer assembly, so that the wafer or the wafer assembly enters the box body from the opening and rotates to seal the opening. According to the invention, the wafer or the wafer assembly intervenes into the box body from the opening, and compared with a conventional dispergator that a pull-out carrier is moved out and put in step by step, the process is simple and efficient; the first end executor is suitable for grabbing the wafer or the wafer assembly intervening in the box body, the situation that the wafer or the wafer assembly is grabbed again after being placed is avoided, the action is concise, and circulation is continuous; the first end effector is suitable for closing the opening to prevent the light projected by the light source from overflowing to the outside from the opening, so that the viscous carrier can absorb the light to reduce viscosity, and the safety is good.

This application provides a composite wound dressing and its preparation method, belonging to the field of medical dressing technology. The composite wound dressing includes an outer support layer and an inner functional layer. The outer support layer is a modified ramie fiber nonwoven fabric, the modification including low-temperature plasma treatment and acetylation modification of the ramie fibers. The inner functional layer is a composite of ramie woven fabric and low-antigen collagen sponge grafted with carvacrol. The collagen sponge penetrates the yarn gaps and pores of the woven fabric, forming a structure in which the collagen sponge and ramie fibers mutually wrap and interweave. The dual-layer structure design of the dressing, with its outer support layer and inner functional layer, provides stable mechanical support through the outer layer to maintain the dressing's shape, while the inner layer enables efficient absorption of exudate and sustained release of antibacterial components, actively promoting wound healing. It exhibits excellent biocompatibility and low immunogenicity risk.

This invention belongs to the field of electromagnetic wave absorbing materials technology, specifically relating to an absorbing material, its preparation method, and its application. This invention uses multi-walled carbon nanotubes (MWCNTs), potassium permanganate (KMnO4), and divalent manganese as raw materials, based on Mn... 2+ With MnO4 ‑ The redox reaction between the two components allows for in-situ uniform loading of MnO2 nanoparticles onto the MWCNT surface through simple stirring in a room-temperature liquid environment, resulting in microwave absorption performance superior to most similar absorbing materials. Compared to traditional methods for preparing absorbing materials, the technical route of this invention offers significant advantages, including simple preparation process, no pollutant emissions, energy-saving and environmentally friendly process, adjustable and controllable material structure, excellent microwave absorption performance, and scalability. This method effectively overcomes the technical limitations in the preparation of absorbing materials, providing a scalable new paradigm for the green and large-scale production of high-performance absorbing materials.

The embodiment of the invention discloses Chinese herbal medicine freckle-removing cream and a preparation method thereof. The Chinese herbal medicine freckle-removing cream is prepared from Chinese herbal medicine decoction liquor and a natural oil-in-water emulsion system, and the Chinese herbal medicine decoction liquor comprises the following medicinal materials: rehmannia, radix polygonati officinalis, Chinese waxgourd seed, stiff silkworm, caltrop, hawthorn, hairyvein agrimony, allium macrostemon, vine of multiflower knotweed, cortex albiziae, platycladi seed, lalang grass rhizome, perilla leaf, pepper and magnolia bark; the natural oil-in-water emulsifying system comprises the following raw materials: olive oil emulsifying wax, shea butter, jojoba oil, grape seed oil and vitamin E. Human body trials prove that the Chinese herbal medicine freckle-removing cream is fine and moist in skin feeling and not greasy after being smeared, and skin irritation reactions such as stabbing pain, redness and pruritus do not exist in the using process; after continuous use for 3 months, chloasma, sunburn and other color spots are obviously faded, the skin glossiness and fineness are obviously improved, and no obvious rebound occurs after the use is stopped; the composition is suitable for dry, oily, mixed and sensitive skin, and has good safety and tolerance.

The utility model discloses a rice noodle extruding machine with an anti-blocking function, which relates to the technical field of rice noodle production and comprises a mounting frame, a feeding bin and a transmission component are fixedly connected onto the mounting frame, the transmission component is arranged in the feeding bin and comprises a sliding plate slidably connected onto the inner wall of the feeding bin, a transmission block is fixedly connected onto the sliding plate, and the transmission block is fixedly connected onto the mounting frame. A sliding rod is slidably connected to the transmission block, a first connecting rod is fixedly connected to the sliding rod, a torsion spring is fixedly connected to the first connecting rod, a stirring rod is fixedly connected to the torsion spring, and a second transmission rod is fixedly connected to the stirring rod, so that retention of materials at a feeding port due to self viscosity is avoided, and feeding continuity is guaranteed; and the sliding rod slides downwards to be separated from the first fixing plate, under the action of the spring and the torsion spring, all the components are rapidly reset to prepare for the next round of feeding and extrusion, the whole process is efficient and high in automation degree, and the labor cost and the precious production time are effectively saved.

The utility model discloses a high purity hydrochloric acid detection automatic titration device of concentration detection technical field, aims at solving the problem that manual titration detects hydrochloric acid concentration in prior art and is easy to exist misoperation and test time is long. Its weighing platform, mixed reactor, support, roots blower, controller and PH sensor, the mixed reactor places on the weighing platform, and the titration container is placed on the support, and the titration container is equipped with the titration tube mouth that points to the mixed reactor opening, and the titration container is communicated through the communicating tube between roots blower, and the detection end of PH sensor is arranged in the inside of mixed reactor, and the PH sensor, roots blower and weighing platform all are electrically connected with controller, the utility model discloses be used for controlling titration speed according to actual detection data in hydrochloric acid titration test, can effectively shorten titration time, improve the detection efficiency, reduce misoperation occurrence probability, ensure the normal advancement of detection test.

The utility model discloses a carbon fractionation reation kettle belongs to the technical field of alumina production. The device specifically through the lower part of the reaction kettle body wall setting carbon dioxide gas inlet, this carbon dioxide gas inlet is connected to the inner coil of reaction kettle body cavity bottom through the gas inlet pipe. The inner coil end is closed, and the tubular body is uniformly densely covered with carbon dioxide gas hole with 0.5~2 mm aperture. The structure realizes the uniform dispersion release of carbon dioxide gas from the reaction kettle bottom multiple points, significantly increases the contact area of gas and the sodium aluminate slurry in the kettle, effectively overcomes the local supersaturation and stratification phenomenon caused by the traditional mode, improves the gas-liquid mixing efficiency and the alumina precipitation uniformity. At the same time, equip with jacket temperature control system to stabilize the reaction condition, and adopt double or three layer stirring paddle to optimize the flow field. The overall structure is reasonable and compact, solves the problem of low mixing efficiency and structural safety hidden danger, and is simple and easy to operate and easy to promote.

The invention relates to the technical field of free silicon dioxide filtering, in particular to an occupational health precipitated free silicon dioxide filtering device which comprises a limiting filtering structure, a rack, an exhaust pipe, a press machine, a display screen and a butt-joint pressure seat, the exhaust pipe is installed on the side portion of the rack in a limiting mode, and the front end of the exhaust pipe communicates with the press machine in a butt-joint mode; a display screen is fixedly mounted at the top of the rear end of the rack, a butt joint pressure seat is in butt joint communication with the position, located at the upper end of the exhaust pipe, of the center of the display screen, a limiting filtering structure is in sealed butt joint communication with the upper end of the butt joint pressure seat, and the limiting filtering structure comprises a spring hinged support, a first pressing frame, a second pressing frame and a filtering treatment component; and the lower end of the first pressing frame is elastically connected with the spring hinged support. Through the arrangement of the limiting filtering structure, the filtering efficiency can be improved, the high-precision requirement is met while the filtering efficiency is improved, and it is guaranteed that the result is accurate.

The invention discloses a fault detection method and system for a driving circuit of an electronic circuit board, and relates to the technical field of electronic engineering. According to the fault detection method for the electronic circuit board driving circuit, impedance spectrum scanning, switch stress pulse and dynamic response test signals are injected into the electronic circuit board driving circuit in sequence, response signals are collected, and the impedance characteristic, the resonance mode and the dynamic performance of the circuit are analyzed. The capacitance value and the equivalent series resistance of a direct current bus capacitor are obtained through impedance analysis, the dominant resonant frequency and the damping ratio of a power loop are obtained through resonance mode analysis, and the phase margin of a control loop is obtained through dynamic performance analysis. According to the method, impedance, resonance and control parameters are extracted through multi-signal injection, fault diagnosis reliability and accuracy are improved through combined analysis, and stable operation of a system is guaranteed.

The present application relates to roughness detection equipment technical field, specifically be a kind of steel plate roughness detector with adjusting mechanism, including instrument body, the side of instrument body is equipped with side link mechanism and telescopic mechanism;The side link mechanism is used to quick-release type connection detection rod, the side link mechanism includes link block and pressing plate piece, the pressing plate piece is rotatably connected link block, the pressing plate piece and link block extrude detection rod, the side of link block is equipped with gasket.The quick-release type side link mechanism of the present application is combined with the telescopic clamping mechanism of precision screw rod, the traditional handheld roughness detector is transformed into the detection device that can be stably clamped in the edge of vertical or inclined steel plate, solves the problem that instrument cannot be fixed, inconvenient operation under special working conditions, realizes bare-handed quick assembly and disassembly and self-adapting different plate thickness, significantly improves detection efficiency and data accuracy.

The utility model discloses a thoracocentesis needle capable of indicating. The thoracocentesis needle comprises a puncture part, a one-way tube, a gas collection chamber, a cylinder body, a piston, a pulling handle and indicating liquid, the upper end face of the puncture part is in an inclined oval shape, and the lower end of the puncture part is connected with the inlet end of the one-way pipe. The output end of the one-way pipe is communicated with one end of the gas collection chamber; the one-way pipe is used for preventing substances on one side of the output end of the one-way pipe from flowing back; the other end of the gas collecting chamber is communicated with the cylinder body, and the gas collecting chamber is used for accumulating gas and forming large bubbles to enter the cylinder body; the piston is arranged in the cylinder body; the barrel body is wholly transparent, and the internal condition of the barrel body can be seen clearly; the pulling handle is fixedly arranged on the side, away from the puncture part, of the piston. The indicating liquid is arranged in the cylinder body between the one-way pipe and the piston and in the gas collection chamber, and is used for observing bubbles overflowing from the gas collection chamber; the utility model not only has a simple structure and is convenient for judging the accuracy of a puncture position, but also can quickly relieve pneumothorax or hemothorax.

The embodiment of the invention provides a data quality inspection method based on dynamic parameter transmission and related equipment, and belongs to the technical field of data management. The method comprises the steps that a quality inspection scheme is newly established, the quality inspection scheme comprises a quality inspection scheme type and a data source, and the quality inspection scheme type comprises a table conventional quality inspection type and a consistency quality inspection type; based on the quality inspection scheme type and the data source, performing quality inspection rule configuration on the quality inspection scheme to obtain a quality inspection scheme after rule configuration, the quality inspection scheme after rule configuration comprising a quality inspection rule; configuring a result list and a service main key of the quality inspection scheme; configuring a scheduling period; and executing the quality inspection scheme based on the scheduling cycle, and generating a quality inspection result based on the quality inspection scheme type, the quality inspection rule, the result detail list and the service main key. According to the embodiment of the invention, the quality inspection scheme can be automatically and periodically executed, the working efficiency and the data quality management efficiency can be improved, the accuracy and effectiveness of the data are improved, and a powerful basis is provided for subsequent data recovery.

The application discloses a kind of pore intelligent regulation weft knitted fabric, including face yarn and ground yarn, the face yarn with the ground yarn is interwoven by plating weft knitting process, forms fabric body, in the process front of fabric body, by the face yarn constitute several regular distribution pore regulation unit;The pore regulation unit is in dry state, present closed or shrinkage form;In hygroscopic state, the pore regulation unit expands, forms the air-permeable channel in the thickness direction of fabric body.The application utilizes the "moisture absorption axial elongation, radial shrinkage and twist to high humidity side" characteristics of face yarn in heat and humidity response yarn, and cooperates with the size stable support of ground yarn, gives the dynamic pore regulation ability of fabric body;When human perspires, face yarn absorbs moisture and elongates and twists, pore regulation unit actively expands, forms three-dimensional air-permeable channel, enhances heat dissipation and moisture removal;After drying, yarn restores, pore closes to reduce air convection to keep warm.

The invention discloses a method for preparing dendritic copper powder and cooperating with methanol reforming for hydrogen production, which comprises the following steps: in a single reaction system, dissolving a copper source and an alkali source in methanol, aging, transferring into a reaction kettle, reacting for 1-6 hours at 250-300 DEG C, and synchronously realizing in-situ preparation of the dendritic copper powder and methanol liquid phase reforming for hydrogen production through a one-step method. According to the method, methanol is used as a solvent, a reducing agent and a reactant at the same time, two independent processes are efficiently coupled, and the process is remarkably simplified; and after the reaction, dendritic copper powder with a three-dimensional branched structure and a gas product mainly containing hydrogen can be obtained at the same time.

The present application belongs to the technical field of mineral processing and metallurgical engineering, and particularly relates to a method for leaching lithium from spodumene by microwave and ultrasonic synergistic strengthening. The method uses beta-spodumene as raw material, mixes the beta-spodumene with concentrated sulfuric acid and phosphoric acid after grinding, and performs rapid sulfuric acid roasting under microwave heating. The obtained roasted material is then placed in a persulfate solution, and short-time water leaching is performed under ultrasonic assistance to realize efficient leaching of lithium. The addition of phosphoric acid can selectively inhibit the dissolution of impurities such as iron and aluminum, and the combination of persulfate and ultrasonic cavitation effect can effectively destroy the mass transfer barrier of lithium ion dissolution. The method can complete water leaching within 2-5 minutes, with a lithium leaching rate of more than 97%, low impurity content, low energy consumption and acid consumption, and is suitable for continuous clean production.

The application discloses a preparation method of low specific surface area superfine alumina powder, which comprises the following steps: acid pickling and impurity removing: industrial gamma alumina is added into an acid pickling solution, and is pressed, filtered, dried to obtain low-sodium alumina; wet grinding: the low-sodium alumina is configured into slurry, is firstly put into a stirring mill for coarse grinding treatment, and then is put into a sand mill for sand grinding treatment to obtain superfine alumina slurry; spray drying: the superfine alumina slurry is subjected to spray drying in a spray drying tower to obtain superfine alumina granulation powder; calcination and phase conversion: the superfine alumina granulation powder is put into a sagger, is transferred into a calcining furnace for calcination to obtain superfine alumina granulation calcined powder; scattering and depolymerization: the superfine alumina granulation calcined powder is subjected to airflow scattering to obtain low specific surface area superfine alumina powder. The method has low cost, simple and easy-to-control process, and the prepared superfine alumina powder has better primary crystal appearance integrity and powder dispersibility.

The invention discloses a device and a method for detecting interface debonding of a hydraulic concrete structure repaired by FRP, and relates to the field of intelligent operation and maintenance of hydraulic engineering, the device comprises a probe and a host, the probe integrates acoustic detection and piezoelectric ceramic implantation functions, and can strike over the FRP surface and rapidly and preliminarily screen a debonding area through sound signal abnormity, and the probe is used for detecting the interface debonding of the hydraulic concrete structure repaired by the FRP. Precisely implanting a piezoelectric ceramic sensor and a matched curing agent into the debonding part by using the same probe to form a long-term monitoring point; by means of the method, the integrated operation process of rapid initial detection, fixed-point implantation and key detection is achieved. According to the invention, reliable implantation and stable signal acquisition of piezoelectric ceramics are realized, the problem of disjunction between detection of a traditional method and long-term monitoring and later detection is solved, and the device has the advantages of high integration level, capability of long-term fixed-point tracking and high applicability.