144results about How to "Large reaction interface" patented technology

The invention provides a wind-crushing water-cooling granulating method of high-temperature liquid steel slag, a granulating device and granulated steel slag and use thereof. The invention belongs to the industrial waste comprehensive utilization filed and particularly relates to the treatment and the utilization of high-temperature liquid steel slag. The wind-crushing water-cooling granulating method of high-temperature liquid steel slag comprises the following steps: liquid steel slag flowing out from a tundish is granulated in the air through the high-speed compressed airflow ejected by a granulator; the granulated steel slag is dropped into a water pool so as to be cooled down; moreover, the pressure of the compressed air is controlled between 0.59 MPa and 0.70 MPa, and the degree of superheat of the liquid steel slag is controlled above 110 DEG C. The granulating device comprises a tundish, a granulator and a water pool, and is characterized in that: a tundish rapid heating-up device is arranged near the granulator; and a compressed air pipe is connected with a compressed air pressure automatic display monitoring device. The final blow rate of steel slag is increased from the 80 percent of the prior art to 95 percent and the steel slag has fine particle diameter; moreover, because unstable phase is eliminated, the steel slag can be directly used in the preparation of cement concrete of various strength grade labels from C30 to C80.

The invention belongs to the field of fuel cells, and particularly relates to a generating and energy storage integrated device based on direct carbon fuel cells (DCFCs) with a liquid metal positive electrode. The generating and energy storage integrated device comprises a metal molten pool, the liquid metal positive electrode, the tubular solid oxide direct carbon fuel cells (SO-DCFCs) and a fluidization air distributing feeding system, wherein the tubular SO-DCFCs can be blind pipes and through pipes and can be inserted into the metal molten pool vertically or horizontally; the feeding system carries a fuel and a positive electrode material into the metal molten pool by virtue of carrier gas, and substances in the molten pool are stirred. The generating and energy storage integrated device provided by the invention has the advantages that chemical energy in the fuel and surplus electric energy in an power grid are changed into chemical energy in the liquid metal positive electrode to be stored, and the integration of a generating device and an energy storage device is realized; the integrated device is simple and compact, the reactivity of the carbon fuel and the metal positive electrode is high, the property of the cell is good, the friction of the cell caused by liquid state positive electrode fluidization is small, the service life of the cell is long, the seal is easy, the collection is convenient, and a large-scale electric pile is convenient to form.

The invention discloses a preparation method of a graphite-carbon black mixed air diffusion cathode. The air diffusion cathode is of a composite layer structure composed of a diffusion layer, a stainless steel mesh and a catalyst layer which are laminated in sequence. The stainless steel mesh is a 60-mesh stainless steel mesh with the thickness being 0.1 mm. Catalyst layer materials are embedded in the stainless steel mesh. The preparation method of the graphite-carbon black mixed air diffusion cathode includes the steps that the 0.5 mm sheet-like catalyst layer formed by mixing graphite and conductive carbon black is prepared, the 0.5 mm sheet-like diffusion layer formed by pressing and sintering the conductive carbon black is prepared, the catalyst layer is embedded into the stainless steel mesh through rolling, the diffusion layer is attached to the other surface of the stainless steel mesh and then tightly combined with the stainless steel mesh after being rolled, and therefore the air diffusion cathode of the composite layer structure is prepared. The prepared air diffusion cathode is used for electro-catalysis synthesis of hydrogen peroxide, high catalytic efficiency is achieved, and average current efficiency is 80% or above.

The invention discloses a pH (potential of hydrogen) responsive metal organic framework nanometer crystal, a preparation method and application. The pH responsive metal organic framework nanometer crystal comprises a metal organic framework and a pH responsive segment, wherein the pH responsive segment is graftedadhered to an organic ligand of the metal organic framework, and can be a pH responsive polymer, a chain segment containing a carboxylic group, or a chain segment containing a pyridine group. The pH responsive metal organic framework nanometer crystal has the advantages that the pH responsive segment is grafted onto the organic ligand of the metal organic framework, so that the contact angle of the metal organic framework is changed, namely that the hydrophilicity and hydrophobicity properties of the metal organic framework are changed, thereby increasing the interface activity of the pH responsive metal organic framework; the pH responsive segment has response property to the change of the pH value of the surrounding environment, the pH responsive metal organic framework has different hydrophilicity and hydrophobicity properties under different pH values, and then the pH responsive metal organic framework can be separated and recycled by adjusting the pH value.

The invention relates to a process for applying hydrogen to deoxygenation of liquid steel. The invention adopts the technical scheme that: when the oxygen blowing decarbonization in a converter comes to an end, or when steel ladle is refined or when the oxygen blowing decarbonization for RH ultra-low-carbon steel production comes to an end, the mixed gas of H2 or Ar-H2 is blown into liquid steel for deoxygenation, the flowrate of the mixed gas ranges from 40 to 3000m3/h, the pressure ranges from 0.5 to 2.0 MPa, and the time of blowing the mixed gas into the liquid steel ranges from 5 to 30min. When converter or steel ladle or RH hydrogen blowing deoxygenation comes to an end, hydrogen which is dissolved in the steel is removed by argon blowing and vacuum treatment, wherein the step of blowing the gas into the liquid steel for deoxygenation is that the gas is blown into the liquid steel for deoxygenation by a gas permeable brick from the bottom of a top-bottom combined blown converter or from the bottom of the steel ladle or from an RH ascending tube; and in the mixed gas of Ar-H2, the volume content of Ar ranges from 10 to 80 percent, and the volume content of H2 ranges from 20 to 90 percent. The invention has the advantages that the process is simple, and the pollution of the liquid steel caused by deoxygenation can be reduced. The process used for removing oxygen in the steel can effectively increase the cleaness of the liquid steel and the quality of steel products.

The invention provides positive slurry of a lithium ion battery as well as a preparation method and application of the positive slurry of the lithium ion battery. The preparation method of the positive slurry of the lithium ion battery comprises the following steps: (1) uniformly agitating and mixing a solvent and an oily binding agent to obtain a mixture A; (2) adding graphene into the mixture A at 25-40 DEG C and agitating uniformly to obtain a mixture B; and (3) adding nickel cobalt lithium aluminate powder into the mixture B; agitating to obtain the positive slurry; and during the agitating period, adding oxalic acid to adjust the pH value of the slurry to 8-9.5. The battery prepared from the positive slurry of the lithium ion battery has the excellent charging/discharging circulating service life and has the high power and safety performance. The battery prepared by the invention is applicable to the fields of hybrid electric vehicles, telecommunication networks, outer spaces, defending equipment and the like.

A method for removing a ceramic core of a hollow blade of a turbine of an aircraft engine comprises the four steps of primary core removing, secondary core removing, third core removing and ultrasonic cleaning. The concentration of KOH alkali liquor used in primary core removing is 40%, the concentration of KOH alkali liquor used in secondary core removing is 30%, and the concentration of KOH alkali liquor used in third core removing is 40%. Every time core removing is conducted, the temperature of the alkali liquor ranges from 160 DEG C to 200 DEG C, the pressure of the alkali liquor fluctuates between 0.4 MPa and 0.5 MPa, water is added every six hours, and soaking time is 48 hours. According to the method, the concentration of the alkali liquor is reduced, the water is added every six hours, and it is guaranteed that salt generated due to reactions is sufficiently dissolved; the alkali liquor is replaced every 48 hours, the concentration of the alkali liquor changes in a stepped mode, and it can be guaranteed that the chemical reactions are conducted effectively; the pressure of the alkali liquor fluctuates in a pulse mode, core cracking can be facilitated, the reaction interface between the alkali liquor and the core is enlarged, and the reacting dose is increased. Through the method, the ceramic core removing period can be shortened to six days from over twenty days, and the first pass yield of core removing can be higher than 90%.

The present invention discloses a silicon/graphene oxide anode composite material for a lithium battery and a preparation method thereof. The anode composite material is formed by uniformly adsorbing nano silicon to the surface of graphene oxide. According to the preparation method, graphene oxide powder is ultrasonically dispersed in mixed solution of water and ethylene glycol to obtain dispersion liquid; the nano silicon and a dispersing agent are added into the dispersion liquid; ball milling is carried out until the nano silicon is completely dispersed; and drying is carried out to obtain the anode composite material with the sheet-like morphology, of which the nano silicon is uniformly adsorbed to the surface of the graphene oxide. The composite material can be used for preparing the lithium ion battery with the characteristics of high specific discharge capacity, excellent rate capability, long cycle life and the like; and the preparation method is simple and reliable, is good in process repeatability, has high operability, is low in cost and is suitable for industrial production.

The invention relates to a high-catalytic activity composite negative electrode material of an intermediate-temperature solid oxide fuel cell and a preparation method of the composite negative electrode material, and belongs to the technical field of an energy material. The composite negative electrode comprises a perovskite structured oxide PrBa<1-x>Co<2>O<6-Delta>, Pr<1-y>BaCo<2>O<6-Delta> or Pr<1-n>Ba<1-m>Co<2>O<6-Delta> in the absence of A-position cation and an oxygen ion conductor material Sm<0.2>Ce<0.8>O<1.9> or Gd<0.1>Ce<0.9>O<1.95>, wherein the mass percent of the oxygen ion conductor material accounts for 20-50%. The preparation method of the composite negative electrode material comprises the following steps of firstly, respectively preparing synthesis solutions of two constituents; secondly, mixing and uniformly stirring the two solutions to obtain a mixed synthesis solution of the two constituents, and heating the mixed synthesis solution to obtain mixed precursor gel; and finally, carrying out high-temperature sintering reaction to obtain composite negative electrode powder. The composite negative electrode material is prepared by a synchronous sintering reaction method, the preparation method has the advantages of simplicity in process, short preparation period, low cost and high efficiency, and is easy to operate, and the oxygen reduction catalytic activity of the negative electrode of the intermediate-temperature solid oxide fuel cell is effectively improved.

A crystalline inorganic fiber or molded body thereof is thermally treated in gas atmosphere containing chlorine. The crystalline inorganic fiber or molded body thereof contains small impurities such as Fe, Cu and Ni. For example, Fe is 15 ppm or less, Cu is 1 ppm or less, and Ni is 0.5 ppm or less.

The invention provides a preparation method for an ultra-low-pressure high-flux reverse osmosis membrane. The method specifically comprises the following steps: S1: preparation of an aqueous solution; S2: preparation of an oil phase solution; S3: preparation of a dry polyamide membrane; and S4, preparation of the reverse osmosis membrane. According to the invention, lipid and ketone derivatives are added in the oil phase solution; the lipid materials and polybasic acyl chloride in an oil phase undergo complexation reaction, so the reaction activity of polybasic acyl chloride is greatly increased; and the ketone materials change dissolution difference between an aqueous phase and the oil phase, so the diffusion ability of polybasic amine monomer to an organic phase is enhanced, the reaction interface of interfacial polymerization is increased, and the effective area of the reverse osmosis membrane is increased, thereby increasing the water flux of the membrane.

The invention provides a new method for preparing ammonia borane, which synthesizes ammonia borane with high efficiency by using an ammonium salt and a boron hydride as raw materials and an organic solvent as a reaction medium and by a wet chemical process. The method is characterized in that the chemical reaction between the starting raw materials is directly promoted by wet-process heating ball milling to form ammonia borane. Subsequently, ball milled pulp is subjected to centrifugal separation and reduced-pressure distillation, the clear liquid is obtained, and thus, high-purity ammonia borane crystal is obtained. The centrifugally separated and ball milled solid is subjected to multiple times of solvent extraction to achieve high yield.

The invention relates to a compound titanium-based lubricant and a preparation method thereof. The compound titanium-based lubricant comprises the following formula components in percentage by mass: 80-90% of base oil, 7-14% of compound titanium soap thickening agent, 2-4% of structure modifier, and 1-2% of antioxidant. According to the preparation method, and through the introduction of a solvent and the base oil, the reaction interface can be increased, the reaction speed and reaction degree can be improved, the preparation time can be greatly shortened, the thickening capability of a compound titanium soap can be improved, the production cost can be lowered, the one-step reaction system is simple to operate, the reproducibility is high, and the quality stability of products is good. The compound titanium-based lubricant is good excellent mechanical stability and oxidization stability, and especially good in water resistance property.

The invention provides a mesoporous phosphate anode material with an olivine structure and a preparation method and use thereof. The anode material is carbon-encapsulated primary particles with nano mesoporous channels, wherein the average pore size of the mesopores is 2 to 50nm; and the anode material also has good carbon encapsulation and small particle size. The preparation method comprises the following steps of: selecting a carbon source for carbon encapsulation; adding raw materials into an organic solvent according to a chemical molar ratio and performing ball milling by using a ball-milling medium with the particle size of 1 to 10mm; and presintering and sintering at high temperature to obtain the mesoporous phosphate anode material with the olivine structure; and the preparation method has the advantages that: the method has fewer steps and is convenient to operate and low in raw material cost. The anode material can be directly used as an anode material of a secondary lithium battery or serves as an additive to be mixed with the conventional anode material.

The invention discloses magnesium-calcium-based hydride powder for hydrolysis hydrogen generation. The magnesium-calcium-based hydride powder comprises the following components in percentage by mass: 14.2 to 50.2 percent of Ca4Mg3H14, 34.8 to 85.7 percent of MgH2 and 0.1 to 15 percent of Mg. In order to increase the hydrolysis hydrogen generation rate, other hydrides and/or salts can also be compounded, and the mass content of the other hydrides is 0 to 5 percent based on the total mass of the components Ca4Mg3H14, MgH2 and Mg; the mass content of the salts is 0 to 11 percent based on the total mass of the components Ca4Mg3H14, MgH2 and Mg; the content of the other hydrides and the content of the salts is not 0 simultaneously. According to the preparation method for the magnesium-calcium-based hydride powder, a magnesium-calcium alloy is activated for hydrogen absorption after being crushed and ball-milled. According to the magnesium-calcium-based hydride powder for the hydrolysis hydrogen generation, the hydrogen yield can be increased on the premise of ensuring the reaction safety and controllability, and particularly the hydrogen yield at room temperature and low temperature is increased.

The method for preparing boron powder by using combustion synthesis process includes the following steps: mixing boron oxide and magnesium powder according to the ratio of 1-2.5:1 (weight), under the protection of argon gas grinding them for 3-30 hr. by using high-energy mill, making the said material into blank or directly using powder material and placing it into combustion synthesis reactor, using detonating process or using resistance wire to make initiation and implement combustion synthesis reaction, after the reaction is completed, using acid to wash and remove magnesium oxide so as to obtain the boron powder whose purity can be up to 90-97%.

The invention relates to the field of SO2 gas sensors and discloses a solid electrolyte SO2 gas sensor and a manufacturing method thereof. The solid electrolyte SO2 gas sensor comprises a silicon substrate, and a SiO2 insulated layer, a conductive film, a Sn/SnF2 thin film, a LaF3 solid electrolyte thin film and a Pt net which are arranged on the silicon substrate in sequence. The conductive film is connected with a first lead; and the Pt net is connected with a second lead. In the technical scheme, the conductive film is an Al film; and the manufacturing method adopts an MEMS (Micro Electromechanical System) technology and has simple process and convenient realization.

The invention provides a high-heat-strength CaO carbon-containing pellet and its preparation method and application. The preparation method of the CaO carbon-containing pellet is: after mixing calcium-based powder, carbon-containing powder, inorganic binder and water The calcium-based carbon-containing pellets are obtained by cold pressing; the calcium-based carbon-containing pellets are optionally placed for a certain period of time, and then dried and calcined under control to obtain the CaO carbon-containing pellets. The thermal strength of the CaO carbon-containing pellets can reach up to 19Mpa at 1200°C, and can be greater than 10MPa at 1300°C; since the raw material is powder, the temperature for preparing calcium carbide is greatly reduced, and can be at 1800‑2000 ℃ to prepare calcium carbide; it solves the problem of large-scale recycling of solid waste in the coal chemical industry, and at the same time prepares high-performance and high-quality raw materials for calcium carbide production, reducing the energy consumption of calcium carbide production.

A method for preparing hydrocarbon fuel through rapeseed oil residues includes the following steps that firstly, silicon carbide spherical particles and an HZSM-5 spherical catalyst are weighed according to the mass ration of the silicon carbide spherical particles to the HZSM-5 spherical catalyst being 1:1-10:1, and the silicon carbide spherical particles and the HZSM-5 spherical catalyst are mixed evenly and added into a quartz reaction kettle; secondly, the quartz reaction kettle is placed in a microwave pyrolysis device and heated to 450-600 DEG C, mechanical stirring is conducted at the speed of 60-120 r/min, the rapeseed oil residues are added gradually, generated steam condenses, and the hydrocarbon fuel is obtained. The method is simple in process and quick in pyrolysis, obtained pyrolysis fuel is high in saturation degree, the content of cycloparaffin and aromatic hydrocarbons can reach 75%, the content of oxygen is low, low-temperature flowability is good, the calorific value is high, and stability is high.

The invention provides a battery anode material and a preparation method thereof and a lithium battery. The preparation method of the battery anode material comprises the following steps: epitaxiallygrowing a high-quality gallium nitride thin film on a conductive crystal substrate to obtain an epitaxial structure; and modifying the epitaxial structure through electrochemical corrosion, forming holes in the surface of the high-quality gallium nitride thin film and making the holes run through the epitaxial structure and forming a crystal gallium nitride material serving as the battery anode material. The crystal gallium nitride material is first used as the battery anode material and is directly used as an electrode in the lithium battery; the preparation method overcomes the technical challenge that the preparation technique of the crystal gallium nitride material is not compatible with the traditional electrode technique; and through adoption of the high-conductivity homogeneous substrate, epitaxial growth of the gallium nitride materials with different properties and structures and modification of the material through the electrochemical corrosion process, the high-quality gallium nitride electrode material is obtained, wherein the material has good cycle stability and high capacity, and has a good application prospect.

The invention relates to a system device for adding rare earth into a continuous casting tundish and an adding method, belonging to the field of ferrous metallurgy. In the invention, a powder spraying tube is arranged between a tundish and a powder spraying pot, one end of the powder spraying tube is connected with a powder spraying pot, the other end is arranged at the slit of a slit-type air brick arranged at the lower part of the tundish, and argon is adopted to spray rare earth powder to the slit of the air brick by the powder spraying tube and then enters the tundish. In the invention, high-pressure powder airflow is utilized to intensively stir molten steel, thus shortening alloying time, greatly improving dynamical condition of metallurgy reaction, promoting homogenized degree of rare earth elements in steel, improving yield of alloy, having strong reproducibility and accurate sprayed elements, and controlling the components of smelt steel within a narrow range. The invention also solves the problem of environmental pollution, and has the advantages of saved investment, portable equipment, easy operation and the like.