190results about How to "Meet industrial production" patented technology

The invention discloses a device for efficiently preparing metal spherical ultrafine powder. The device comprises a shell, a crucible and a powder collection area, wherein the crucible is arranged in the shell. The device is characterized in that a thermal couple is arranged inside the crucible; sensing heaters are arranged outside the crucible; the bottom of the crucible is provided with a nozzle with a small hole; a concentrator is arranged below the nozzle; the periphery of the concentrator is provided with sensing coils; the powder collection area comprises a collection disk arranged at the bottom of the shell and a rotary circular disk arranged above the collection disk. The invention further discloses a method for preparing metal spherical ultrafine powder. A technology for preparing fine particles by cutting capillary jet with electromagnetic force and a centrifugal atomizing method are combined, so that metal powder which has the advantages of narrow particle diameter distribution interval, high roundness, high fluidity, superior spreading property, uniform and controllable size and nonexistence of satellite droplets and meets the 3D printing use requirement can be prepared. The method is suitable for industrial production.

The invention relates to an iron and vanadium synergistically doped lithium-rich manganese-based positive electrode material and a preparation method thereof. A chemical formula is xLi<2>MnO<3>.(1-x)LiMn<1 / 3>Ni<1 / 3>Co<1 / 3>O<2>-Fe<y>V<z>, wherein x is not less than 0.1 and not greater than 0.9, y is not less than 0 and not greater than 0.1, z is not less than 0 and not greater than 0.1, and y+z is not less than 0.005 and not greater than 0.1. In the preparation method of the iron and vanadium synergistically doped lithium-rich manganese-based positive electrode material, a carbonate precursor containing three elements of nickel, cobalt and manganese is prepared through coprecipitation reaction, a doping element is added while the carbonate precursor containing three elements of nickel, cobalt and manganese is mixed with a lithium compound, and the doping element is at least one of Fe and V. The preparation method is simple in technology and convenient to operate, reduces equipment requirement and manufacturing cost, and satisfies industrial production; by co-doping of iron and vanadium, two metallic elements play a role in synergistic effect, specific discharge capacity and initial coulomb efficiency of the lithium-rich manganese-based positive electrode material are improved, and the lithium-rich manganese-based positive electrode material has better application foreground in the fields of power supply and battery energy storage.

The invention discloses a preparation method for a modified graphene-loaded titanium dioxide composite photocatalyst. The method comprises the following steps: obtaining a graphene oxide suspension through an improved Hummers method, and adding triethanolamine into the graphene oxide suspension for reacting to obtain a modified graphene oxide suspension liquid; dropwise adding the obtained modified graphene oxide suspension liquid into a sulfuric acid solution in which titanyl sulfate is dissolved; performing ultrasonic auxiliary soaking, and then performing centrifugal separation to obtain a composite photocatalyst precursor; adding the composite photocatalyst precursor into an alkali solution to perform hydrothermal reaction; pre-drying a hydrothermal reaction product, and performing high-temperature calcining and reducing in an air atmosphere to obtain the modified graphene-loaded titanium dioxide composite photocatalyst which is stable in structure, high in specific surface area, high in photocatalytic activity, small in titanium dioxide particle size (about 10 nm), uniform in distribution, and difficult to agglomerate. The method is easy to operate and low in cost, and meets industrial production.

The invention discloses silica sand tailings and coal gangue-based foamed ceramic and a preparation method thereof. The foamed ceramic is prepared from quartz sand ore tailings and / or silica sand tailings, coal gangue and a sintering additive in blank forming and sintering manners. The preparation method is simple in preparation process, mild in reaction condition, and low in raw material cost; the prepared foamed ceramic has the characteristics of high strength, high porosity, low cost, no secondary pollution and the like; and the specific characteristics are as follows: the utilization rate of solid waste materials can be up to 85%; the volume density of the foamed ceramic is 0.37-0.74g / cm<3>; the porosity is 61.6%-87.5%; the bending strength is 2.1-6.2MPa; the compressive strength is 6.1-15.2MPa; the acid resistance is 98.3%-98.9%; and the alkali resistance is 99.1%-99.4%.

The invention discloses a method for preparing gold nanoparticles based on a polyamidoamine amine supermolecular hyperbranched polymer. The method comprises the steps of slowly dripping an HAuCl4 aqueous solution into an aqueous solution of the polyamidoamine amine supermolecular hyperbranched polymer, and performing stirring reaction under a shading condition to obtain gold nanoparticle aqueous dispersion liquid. According to the preparation method, the polyamidoamine amine supermolecular hyperbranched polymer is simultaneously used as a reducing agent and a stabilizing agent; under a mild reaction condition, the gold nanoparticles which are high in dispersivity and stability, are uniform in particle size distribution and are extremely high in catalysis activity to reduction of nitroaniline are prepared; particularly, the method can be used for effectively controlling the particle size of the gold nanoparticles by controlling the reaction condition and is easy to operate and feasible.

The invention discloses a method for achieving efficient and comprehensive resource utilization of arsenic-alkali residues. The method comprises the steps that after oxidation and water logging are conducted on the arsenic-alkali residues, solid-liquid separation is conducted, so that leachate and antimony-enriched residues are obtained; an ammonium-source solution is made to react with metallic oxide, so that a metallic ammonium complex ion solution is obtained; the metallic ammonium complex ion solution and a crystal growth accelerant are added to the leachate for a reaction, a mixed solution obtained after the reaction is sequentially subjected to aging, crystallization, precipitation and solid-liquid separation, and an obtained solid phase is an ammonium arsenate metallic salt product;and firstly, treatment of heating for ammonium removal is conducted on a liquid phase, then, carbon dioxide is introduced for a reaction, so that sodium bicarbonate crystals are separated out, and thermal decomposition is conducted on the sodium bicarbonate crystals, so that a sodium carbonate product is obtained. By means of the method, antimony, alkali and arsenic can be rapidly and efficientlyseparated out of the arsenic-alkali residues; the effect that the arsenic is efficiently separated from the alkali is achieved; and in addition, the method is low in cost, simple in process and convenient to operate, and the requirement of industrialized production is met.

The invention relates to a processing method of fruit-flavor dried goose slices. The processing method comprises the following steps of: (1) finishing; (2) freezing; (3) slicing; (4) preparing a pickling liquid; (5) vacuum tumbling; (6) tedding; (7) roasting; (8) curing by adopting a juice; (9) baking obtained slices; and (10) packaging. According to the invention, during preparation of the pickling liquid, composite phosphate and papain are added as a composite tenderness agent, the effect is obviously superior to the effect obtained after one tenderness agent is abundantly and independently used; the added Arabic gum can form a gel system with goose egg white, so that taste molecules and smell molecules in the dried goose slices can be reserved to the maximum, and the dried goose slices have good flavor; the vacuum tumbling is adopted, therefore, compared with the prior art, the processing method has the advantages that the curing time is reduced, the technological period is shortened, the pickling liquid is absorbed to the maximum, the dried goose slices are uniformly pickled, the water binding capacity and tenderness are improved, and the mouthfeel is smooth; after being cured by adopting juice, the dried goose slices are increased in content of vitamin, and improved in nutritive values, and different juices can attach different flavors.

The invention discloses magnesium aluminum silicon system glass and a preparation method of high-crystallinity-degree transparent glass-ceramic. The glass-ceramic is prepared from component raw materials including MgO, Al2O3, SiO2, a sintering assistant, a clarifier and a nucleating agent through a fused cooling-controllable devitrification method, and a fusing process for high-temperature convectional mixing homogenization through temperature perturbation induction is adopted to fuse mixed batch. The raw materials are easy to obtain, the prepared glass-ceramic has the advantages of high crystallinity, high light transmittance, higher strength, excellent chemical stability and the like. It is specifically embodied in that with the transmittance of 2mm glass-ceramic with the crystallinity of 75-95 vol.% in a visible region is 60-90%, the volume density is 2.450-2.550 g / cm<3>, the microhardness 7.0-9.5 GPa, the thermal expansion coefficient TEC (25-600 DEG C) is 14.00-26.00 * 10- / 7 DEG C, and the glass-ceramic is used as a solid optical functional material.

The invention discloses a preparation method and an application of polar group-modified pendent double bond post-crosslinked polydivinylbenzene resin. The preparation method comprises: firstly performing a polymerization reaction of divinylbenzene monomers, polar monomers, and a pore forming agent to obtain a polar group-modified pendent double bond post-crosslinked polydivinylbenzene resin precursor; performing further crosslinking through a Friedel-Crafts reaction to obtain the polar group-modified pendent double bond post-crosslinked polydivinylbenzene resin. The preparation method is simple, and low in cost, and the prepared post-crosslinked resin has a high specific surface area and a special pore structure; the post-crosslinked resin can be used for adsorbing and removing organic matter in waste water, has the effect of selective adsorption, and especially has obvious selective adsorption effect on Congo red and / or rhodamine B.

The invention discloses a water-based thermosetting glass printing ink and a preparation method thereof. The ink is composed of a water-based resin solution, a crosslinking agent, a dispersing agent BYK-191, an assistant, water and a pigment. The preparation method comprises the following steps: mixing part of the water-based resin solution with the dispersing agent BYK-191, assistant and pigment, and carrying out shear dispersion to obtain a slurry with the particle size of not greater than 20 micrometers; and adding the rest of water-based resin solution, assistant, crosslinking agent and water into the slurry, and sufficiently stirring. The preparation method is simple and cheap in raw materials; and the prepared water-based thermosetting glass printing ink has the characteristics of low cost, environment friendliness, favorable adhesive force with the glass substrate, favorable alcohol resistance, favorable water resistance, favorable abrasion resistance, high hardness and the like.

The invention discloses a molybdenum doped vanadium disulfide micron flower material and a preparation method and application thereof. The molybdenum doped vanadium disulfide micro flower material iscomposed of molybdenum doped vanadium disulfide nanosheets by self-assembly. The preparation method comprises the steps of adding a vanadium source, a molybdenum source and ammonia water to water, stirring until being transparent, adding a sulfur source, and stirring to obtain a mixture; making the mixture be further subjected to an one-step hydrothermal reaction, and washing and drying a reactionproduct to obtain the molybdenum doped vanadium disulfide micron flower material; the preparation method has the advantages of simple process, low cost, high yield, mild condition, simple required equipment and environmentally friendly performance, and is capable of mass production. The application of the molybdenum doped vanadium disulfide micron flower material in an electrocatalytic hydrogen evolution reaction shows the excellent catalytic activity, the overpotential is as low as 0.243V (relative to a standard hydrogen electrode), and the Tafel slope is as low as 52.6mV / Dec.

The invention provides a novel method for producing propylene and ethylene through catalytic cracking of olefins, which comprises the steps of: taking C4-C12 olefins as raw materials; and performing acatalytic cracking reaction of the olefins on the raw materials through a catalyst bed to generate the propylene and the ethylene under the conditions that the reaction temperature is between 450 and650 DEG C, the reaction pressure is between 0 and 0.3MPa, the weight space velocity of the olefins is between 1 and 14 h<-1>, and the weight ratio of water to the olefins is 0.1-10, wherein a catalyst comprises a ZSM-5 molecular sieve, an adhesive and a phosphorus element supported on the catalyst, the silicon-aluminum molar ratio SiO2 / Al2O3 of the ZSM-5 molecular sieve is 10-300, and the grain diameter of crystal grains of the ZSM-5 molecular sieve is between 10 and 800nm. The method has longer reaction operation time while maintaining the high yield of the propylene and the ethylene, and can be used for industrialized production.

The invention provides a fiber denaturalized padding device of a denaturalized treatment device, which solves the problems that former similar equipment can not treat the denaturalized treatment uniformly and meet industrial production. The invention comprises a steeping tank for holding denaturant, auxiliary rollers formed by two rollers that are contacted to two external walls and arranged on a device frame and above a cut of the steeping tank. The invention can accomplish the fabric steep in the denaturant as well as the rolling process of steeped fabric, etc.

The invention discloses a method for preparing olive leaf extract, belonging to the technical field of plant effective ingredient extraction and separation. The method for extracting and separating oleuropein from olive leaves in the invention has the following steps: extracting the olive leaves by polar solvent, precipitating by flocculant to obtain centrifugal solution and precipitate, extracting the centrifugal solution, further separating by preparative high performance liquid chromatography (HPLC) for acetic ether extractive phase, performing on-line detection by a differential refraction detector, objectively collecting oleuropein product segments, performing reduced pressure concentration on preparation liquid, and carrying out vacuum drying or spray drying to obtain the olive leaf extract in which the oleuropein content is larger than 90%. The invention has the advantages of simple procedures, realization of high purity oleuropein preparation, large preparation amount, high yield and good product quality and is suitable for industrialized production; and the prepared extract has no residual of harmful substances.

The invention discloses thermosetting type glass screen printing ink. The thermosetting type glass screen printing ink includes, by weight, 40%-65% of Evonik EP112 saturated polyester, 21%-45% of titanium dioxide TR-92, 0.5%-2.0% of fumed silica A-200, 10%-15% of methylated amino resin MF915, 1.0%-4.0% of adhesion promoters LTW, 0.5%-1.5% of antifoaming agents FOAMEXN, 0-1.0% of flatting agents BYK-310, 0-1.0% of brightening agents OB and 2%-6% of DBE solutions. A preparation method of the thermosetting type glass screen printing ink includes the steps that the saturated polyester, the titanium dioxide and the fumed silica are firstly stirred evenly, then the methylated amino resin, the adhesion promoters, the antifoaming agents, and / or the flatting agents, and / or the brightening agents are added into the mixture, and the DBE solutions are added finally. The thermosetting type glass screen printing ink has good adhesion, water resistance, acid and alkali resistance, cold and hot impact resistance, butanone dissolution resistance, fast yellowing resistance, high temperature yellowing resistance, flexibility, constructability and ultraviolet resistance.

The invention relates to a strontium titanate-based lead-free high-energy storage density and high-energy storage efficiency ceramic material and a preparation method thereof. The preparation method comprises the following steps: firstly batching according to a chemical formula (1-x)SrTiO3-x(0.65BaTiO3-0.35Bi0.5Na0.5TiO3), wherein x represents a molar fraction and is greater than or equal to 0.1 but less than or equal to 0.6; ball-milling and drying to obtain a raw material powder body; adding the obtained raw material powder body into a bonding agent for pelleting, decaying for 24-48 hours, pressing into a sheet, performing glue removal treatment and sintering at a temperature of 1250-1350 DEG C to obtain the strontium titanate-based lead-free high-energy storage density and high-energy storage efficiency ceramic material. The ceramic material provided by the invention is simple and stable in preparation process, suitable for industrial production and excellent in energy storage characteristics, the energy storage density calculated based on a ferroelectric hysteresis loop is 0.961-1.403 J / cm<3>, and the energy storage efficiency is 84.77-91.63 percent.

The invention discloses a fast breeding method for dendrobium candidum protocorm tissue culture. The method comprises the following steps that 1, explants are cleaned and sterilized; then, the explants are inoculated into an induction medium to perform induction culture; 2, the protocorm inducted in the first step is inoculated into a liquid proliferation culture medium to perform suspension shaking culture; 3, the protocorm obtained in the second step is transferred into a differentiating culture medium to be cultured for obtaining differentiated seedlings; 4, the seedlings with the height being 1 to 2cm in the third step are transferred into a rooting culture medium for rooting. The method has the advantages that the proliferation times can be improved; the industrial fast breeding can be realized. The dendrobium candidum protocorm cultured by the method has high differentiation rate; the dry weight and fresh weight content is improved; the transplanting survival rate is correspondingly improved.

The invention discloses a purification method of high-purity sub-nanometer silicon carbide micro powder, relating to a grading purification method of silicon carbide micro powder. The purification method is as follows: firstly, grading slurry; secondly, adding deionized water, blowing agent and dispersing agent into grade slurry; thirdly, using aeration equipment to finish physical purification of the slurry; fourthly, adding sulfuric acid, hydrochloric acid, hydrofluoric acid, deionized water and alkaline substances to the slurry after physical purification to carry out chemical purification; and finally maximally stoving until the water content is less than or equal to 0.2%, thus completing purification to obtain the product. The purification method has the beneficial effect of maximally reducing the generation of waste during purification process, the method for regulating and controlling granularity is more flexible, wherein the purification of Sic can reach more than 99.9%, the value of D50 is less than or equal to 0.5 mu m, therefore the silicon carbide micro powder prepared by the method can completely meet the requirement of high-purity sub-nanometer silicon carbide micro powder used for pressureless sintering ceremics.

The invention discloses a carbon fluoride composite positive electrode and a preparation method of the carbon fluoride composite positive electrode. According to the carbon fluoride composite positive electrode, an aluminum foil is used as a substrate, and the surface of the substrate sequentially comprises a composite coating containing carbon fluoride, carbon conductive and adhesives and a nickel-containing plating layer from bottom to top. The preparation method comprises the following steps: adding carbon fluoride, carbon conductive and adhesives into organic solvents for stirring uniformly to obtain mixed slurries; coating the surface of the aluminum foil by the obtained mixed slurries; drying and forming the compound coating on the surface of the aluminum foil; plating the nickel-containing plating layer on the surface of the composite coating by means of chemical nickel plating; performing thermal treatment and rolling; cutting into electrode positive electrodes. The preparation method is easy to operate, mild in process conditions and low in cost; the prepared composite positive electrode is stable in structure and high in conductivity and can be used for preparing a lithium carbon fluoride battery with high specific capacity and high current efficiency.

The invention provides an ether-based double-sulfur amine ester derivative or an ether-based bis-thiourea derivative and a preparation method and application thereof. The molecular structure of the ether-based double-sulfur amine ester derivative or the ether-based bis-thiourea derivative contains a large quantity of thioamide or thiourea or thioacid amide ether or other lipophilic groups and carboxyl hydrophilic groups. The preparation method includes the steps that bis-chloro-carbonic ester and thiocyanate are subjected to a substitution reaction, an intermediate product containing bis-acyl bis-isothiocyanate is generated, the intermediate and an alcohol compound or an amine compound or a phenol compound are subjected to an addition reaction, and then the ether-based double-sulfur amine ester derivative or the ether-based bis-thiourea derivative is obtained. The preparation method is simple, the prepared product directly serves as a non-molybdenum sulphide ore inhibitor, and floatation separation of molybdenum sulfide ore and the non-molybdenum sulphide ore can be effectively achieved. The preparation method is especially suitable for separation of molybdenite and copper sulphide ore, galena, sphalerite, pyrite, arsenopyrite, jamesonite concentrate, nickel sulfide ore, bismuth sulfide ore and the like, and the grade of molybdenum concentrate is improved.

The invention discloses a manufacturing process of large 14Cr17Ni2 stainless steel forgings. The process comprises steps as follows: (1) optimization of chemical components: N elements with the content wt being 0.055%-0.065% are added, the content wt of Ti elements are controlled to be smaller than or equal to 0.010%; (2) forging: the large 14Cr17Ni2 stainless steel forgings are forged and heated at 1,100-1,180 DEG C, and the finish forging temperature is controlled to be larger than or equal to 950 DEG C; (3) thermal treatment: the large forgings are subjected to annealing, quenching and tempering, wherein annealing comprises steps as follows: after forging ends, the forgings are subjected to thermal insulation in a waiting furnace; a gate is closed, the furnace is cooled, and thermal insulation is performed; the temperature is increased to 690 DEG C plus or minus 10 DEG C for thermal insulation; the forgings are cooled and discharged from the furnace, and annealing is completed; quenching and tempering comprises steps as follows: the forgings are heated to 1,020 DEG C plus or minus 10 DEG C for thermal insulation, oil cooling is performed after the forgings are discharged from the furnace, and tempering is performed; the forgings are heated to 600 DEG C plus or minus 10 DEG C for thermal insulation and immediately subjected to oil cooling after being discharged out of the furnace. With the adoption of the manufacturing process, the problem that cracks are easily caused during forging of the large 14Cr17Ni2 forgings can be solved, mechanical properties of the large forgings are remarkably improved, and the use requirements of internal components of nuclear power reactors are completely met.

The invention discloses a nickel coated carbon fluoride positive electrode material and a preparation method of the nickel coated carbon fluoride positive electrode material. The positive electrode material is prepared by coating the surface of carbon fluoride particles with a nickel-plating layer. The preparation method comprises the steps that the carbon fluoride particles are sequentially sensitized, activated and reduced under a function of dispersing agents and the nickel-plating layer is plated; the carbon fluoride particles coated with the nickel-plating layer are subjected to thermal treatment to obtain the nickel coated carbon fluoride positive electrode material. The preparation method is easy to operate, mild in process conditions and low in cost; the prepared nickel coated carbon fluoride positive electrode material is uniform in coating of nickel-plating layer, stable in structure, and can be used for preparing a lithium carbon fluoride battery with high conductivity, high specific capacity and high power density.

The invention relates to a production process of high-strength bent pipe steel, which is a production process of high-strength X80 steel plate used for bent pipes. Composition: C: 0.015-0.080%, Mn: 1.50-1.80%, Si: ≤0.30% , S: ≤0.0030%, P: ≤0.015%, Nb: 0.04~0.15%, Ti: 0.005~0.030%, V: ≤0.120%, Alt: ≤0.060%, N: ≤0.010%, Mo: 0.10~0.60 %, Cu: 0.10~0.50%, Ni: 0.10~0.50%, Cr: 0.10~0.30%, Ca: ≤0.01%, the rest is iron; in the slab reheating process, the slab heating temperature: 1100~1200℃; In the controlled rolling process, the termination temperature of controlled rolling in the recrystallization zone: 1000-1080°C, the start temperature of controlled rolling in the non-recrystallization zone: 900-980°C, the termination rolling temperature: 760-880°C; In the cooling process, the termination cooling temperature: 300-550°C, and the cooling rate: 3-40°C / s. The product of the invention has good comprehensive properties, especially excellent performance in low-temperature impact toughness, and can still maintain a Charpy impact energy of about 300J at about -30°C.

A wine-prepared scutellaria root is prepared through slicing, steaming, drying, immersing in yellow wine in sealed mode, parching at 120-140 deg.C for 8-12 min, cooling and packing.

The invention discloses a cigarette filter tip reducing carbonyl compounds in the cigarette mainstream smoke and a manufacture method thereof. The filter tip comprises at least one fiber filtering bar unit segment and at least one carbonyl reducing filtering bar unit segment in a compounded manner. The manufacture method includes dispersing carbon material in water through ultrasonic, adding adhesive material for ultrasonic dispersion, spraying the obtained dispersion mixed liquid to the surface of tobacco material, drying, and obtaining the compound material; manufacturing a filtering bar unit segment through the compound material, and manufacturing the filter tip with the fiber filtering bar unit segment in a compounded manner. The filter tip is capable of reducing the carbonyl compounds in the cigarette mainstream smoke effectively and selectively, and the cigarette taste and quality are not influenced; the filter tip manufacture method is simple and low in cost, and the industrial production can be met.

Belonging to the field of catalytic chemistry, the invention relates to a preparation method of a supported heteropolyacid catalyst. The method includes the steps of: dipping a carrier material in a heteropolyacid aqueous solution and performing stirring to obtain a pulp; placing the pulp in a N2 environment, raising the temperature and increasing the pressure to make N2 reach a supercritical condition and sustaining the state for 2-6h to obtain a catalyst crude product; and separating and drying the catalyst crude product to obtain the supported heteropolyacid catalyst. In addition, the invention also relates to the supported heteropolyacid catalyst prepared by the method and application thereof in conversion of glycerin to acraldehyde. The method has the advantages of simple operation, mild conditions, and good safety. The prepared supported heteropolyacid catalyst has good dispersibility, high catalytic activity, and is easy to recover. The reaction of conversion of glycerin to acraldehyde under the catalysis of the catalyst achieves excellent conversion rate, selectivity and yield, and effectively alleviates the loss of the catalyst active components.

Seasoned freshwater fish is prepared from components in parts by weight as follows: 70 parts of channel catfish, 80 parts of water, 1.5 parts of welsh onions, 1.5 parts of ginger, 1.25 parts of Erguotou, 2 parts of onions, 0.5 parts of coriander, 1 part of celery, 0.2 parts of dried chilies, 0.5 parts of garlic, 0.1 parts of dried Sichuan pepper, 0.2 parts of pepper, 0.1 parts of cinnamon, 0.2 parts of cloves, 0.1 parts of dahurian angelica roots, 0.2 parts of liquorice, 0.1 parts of perilla frutescens, 0.2 parts of peach blossoms, 0.1 parts of lilies, 0.2 parts of pepper leaves, 0.1 parts of platycodon roots, 0.1 parts of date pits, 0.2 parts of okra seeds, 0.2 parts of dried red bayberries, 0.1 parts of Chinese yams, 0.2 parts of dang shen, 0.1 parts of Angelica sinensis, 0.2 parts of Gynostemma pentaphyllum and 0.1 parts of senna leaves. The raw materials are low in cost, the process is simple, industrial production is facilitated, the added value of fish by-products is increased greatly, and the market prospect is broad.

The invention discloses a nitrogen-doped hard carbon material as well as a preparation method and application thereof, and the preparation method of the hard carbon material comprises the following steps: pretreating, drying and crushing a biomass raw material to obtain primarily purified biomass raw material powder; adding the biomass raw material powder into dilute nitric acid, heating, cooling to room temperature, filtering, washing and drying to obtain secondarily purified biomass powder; calcining the secondarily purified biomass powder in an argon atmosphere, and cooling in the argon atmosphere to obtain a biomass hard carbon material; and placing the biomass hard carbon material in plasma equipment to be treated; wherein the power ranges from 400 w to 800 w, and the treatment time ranges from 0 min to 75 min. The hard carbon material prepared by the invention has the characteristics of high porosity, large specific surface area and large interlayer spacing, and can promote the diffusion of sodium ions and improve the capacity, dynamics, mass transfer speed, cycle performance and first coulombic efficiency of a carbon negative electrode of a sodium ion battery.

The invention discloses a high-flux magnetic solid-liquid separation device and a method thereof for purifying a magnetic particulate matter in wastewater. The device comprises an excitation system and a centrifugal sorting system, wherein a main body of the centrifugal sorting system is in the form of an inverted circular truncated cone and further has a sorting cavity which is of a double-layer structure of an inner cavity and an outer cavity; the top of the sorting cavity is provided with a material feeding opening and a purified water outlet; the bottom of the sorting cavity is provided with a magnetic material outlet and a driving device; the inner surface of the side wall of the inner cavity of the sorting cavity is provided with a magnetic medium; the excitation system comprises at least two groups of exciters; the exciters are uniformly distributed on the side surface of the exterior of the outer cavity of the sorting cavity. According to the device, a high-gradient magnetic field, a centrifugal force field and a gravitational field are organically combined; the device is applied to the purification of the magnetic particulate matter in the wastewater; the quick and high-efficiency separation of a superfine solid suspended matter can be realized; further, a method for treating the wastewater by utilizing the device is simple in process and convenient to operate; the industrialized production is realized.

The invention discloses a mobile overturn robot and a multistation overturn method thereof, and belongs to the field of robots. The mobile overturn robot comprises an overturn device, a transfer trolley, and a travelling rail. The overturn device is arranged on the transfer trolley. The transfer trolley transfers the overturn device to different processing stations to perform overturn operation along the travelling rail. The overturn device comprises a power mechanism, an orienteering mechanism, and a locking mechanism. The locking mechanism is used to fix a cylindrical member. The power mechanism comprises an oil cylinder and a pull rod. The pull rod is connected with the locking mechanism. The oil cylinder moves horizontally to drive the pull rod to pull the locking mechanism to overturn. The orienteering mechanism is used to control operation directions of the power mechanism. The mobile overturn robot can perform overturn operation on a workpiece on different stations, and satisfies fast-paced industrial production, and overturn is stable and production security is high.