85results about How to "Small and uniform" patented technology

The invention provides a process technology for granulating blast-furnace slag and utilizing waste heat. The process technology is characterized by comprising the following steps of: performing primary cooling and triple granulation on high-temperature molten slag from a blast furnace in a slag primary cooling device to form fine granules with diameter of less than 3mm and temperature of about 800-1,000 DEG C; discharging the fine granules through a high-temperature slag discharge valve; entering a slag basket and conveying to the upper part of a slag secondary cooling device; falling to the lower part of the slag secondary cooling device along a plurality of layers of baffle heat exchange components which are arranged in the slag secondary cooling device; and cooling to about 200 DEG C and discharging through a low-temperature slag discharging valve, wherein waste heat of normal pressure steam of 200 DEG C can be recovered by the slag primary cooling device; and waste heat of hot circulating air of over 600 DEG C can be recovered by the slag secondary cooling device. The invention provides equipment for granulating blast-furnace slag and utilizing waste heat. The equipment mainlycomprises the slag primary cooling device, the slag secondary cooling device, a waste heat boiler and the like. The process technology and the equipment have the advantages of good granulation effectof the molten slag, small and uniform size of slag granules, almost zero new water consumption and low environmental pollution.

The invention discloses a rubber tire tread and a milling process thereof. The rubber tire tread comprises the following components in parts by weight: 70-110 parts of natural rubber, 0-15 parts of styrene-butadiene rubber, 5-20 parts of tread rubber powder, 1.5-2.5 parts of stearic acid, 1-2 parts of sulfur powder, 2-18 parts of white carbon black, 12-15 parts of carbon block, 2-30 parts of aromatic oil, 1-8 parts of zinc oxide, 4-7 parts of an anti-aging agent, 1-4 parts of pine tar, 1-4 parts of an accelerating agent, 0.2-1 part of an anti-reversion agent and 2-5 parts of a binding agent. A three-section milling process is adopted, and the milling process can improve the abrasive resistance, tear resistance and chunking and chipping resistance of the tire tread.

A large-size glass substrate, from which a photomask substrate is formed, is prepared by processing a large-size glass substrate stock by (1) a flattening removal quantity based on height data of the substrate stock in the vertical attitude plus a deformation-corrective removal quantity. The deformation-corrective removal quantity is calculated from (2) a deflection of the substrate stock by its own weight in the horizontal attitude, (3) a deformation of the photomask substrate caused by chucking in an exposure apparatus, and (4) an accuracy distortion of a platen for supporting a mother glass.

The invention relates to a dust collecting device for digestion water bath of quick lime. The dust collecting device comprises a de-dusting pool, a dust collector shell, a de-dusting pipeline, an overflow water seal pool, a buffering water pool, a water level adjusting hole and a water level adjusting device, wherein the dust collector shell is located above the de-dusting pool; one end of the de-dusting pipeline is externally connected with a de-dusting interface of a lime digester while the other end passes through the dust collector shell and extends into the de-dusting pool under the dust collector shell; an underwater pipeline nozzle is arranged at one end of the de-dusting pipeline extending into the de-dusting pool; a net structure or a porous structure is arranged at the tail end of the underwater pipeline nozzle; the overflow water seal pool is located on one side of the de-dusting pool; the buffering water pool is located on the other side of the de-dusting pool; the water level adjusting hole is located between the de-dusting pool and the overflow water seal pool and is formed at the lower end on one side of the dust collector shell; a clamping and releasing slot is formed on the outer side of the shell aside the water level adjusting hole; the water level adjusting device comprises a water level adjusting plate, a screw rod and an adjusting valve; the water level adjusting plate is placed in the clamping and releasing slot; the vertical width of the water level adjusting plate is slightly more than the vertical width of the water level adjusting hole.

A preparing method of rutile vanadium dioxide nanometer particles is disclosed. The method includes 1) preheating purified water or deionized water until the water is boiling, adding a vanadium compound, stirring to obtain a vanadium compound suspension A, cooling to room temperature, adding ammonia water, sealing a container, and stirring for 0.5-3 h until a transparent solution B is prepared, 2) adding a hydrazine compound into the transparent solution B, stirring to obtain black suspension C, transferring the suspension C to a hydrothermal reactor, heating and reacting to obtain a black brown suspension D, 3) transferring the black brown suspension D into a transparent container, adding ethanol, allowing the mixture to stand so that the mixture is layered naturally after the solution is stationary, removing the supernatant liquid, adding ethanol again, stirring, allowing the mixture to stand, naturally layering, and removing the supernatant liquid again to obtain wet powder E, and 4) drying and oxidizing the wet powder E in a drying oven, firing in an atmosphere furnace containing a protective atmosphere, and treating to obtain the rutile vanadium dioxide nanometer particles. Raw materials of the method are cheap. The method greatly reduces emission of 'three wastes' or secondary environment pollution.

The invention discloses a preparation method for rutile phase vanadium dioxide superfine nano powder, which comprises the following steps: S1, enabling ammonium hydroxide to quickly react with an acidic tetravalent vanadium solution to obtain turbid liquid B; S2, performing sealing, heat preservation and stirring treatment on the turbid liquid B to obtain a colloidal suspension C, wherein the temperature for heat preservation is not higher than the boiling point of a solvent in the tetravalent vanadium solution; S3, performing solid-liquid separation and cleaning on the colloidal suspension Cto obtain hydrated vanadium hydroxide colloid D; S4, drying the hydrated vanadium hydroxide colloid D and sintering in the protection atmosphere to obtain the rutile phase vanadium dioxide superfine nano powder. The rutile phase vanadium dioxide particles prepared by the process method disclosed by the invention have the advantages of high purity, smaller and even size and good dispersion and canserve as an excellent raw material for high-quality vanadium dioxide intelligent temperature-control coated windows.

The invention provides carbon quantum dots prepared from pyrolysis molecular sieves and application of the carbon quantum dots in detection of hydrogen peroxide, and belongs to the technical field ofcarbon-based nanomaterials. With the aid of the spatial confinement effect of the molecular sieves, the carbon quantum dot materials with ultraviolet light excitation, small size, size uniformity (about 2.5 nm), good stability and photoluminescence properties are obtained through hydrothermal synthesis and aftertreatment, and the carbon quantum dot materials can be applied as a fluorescent probe to detect hydrogen peroxide. The main preparation process includes the following steps that an aluminum source, a magnesium source, phosphoric acid and an organic templating agent are used as raw materials, molecular sieve crystal products are prepared through hydrothermal synthesis, and water-soluble carbon dot products are obtained through pyrolysis, chromatography and the like. The prepared carbon dots show excitation-independent blue fluorescence (the emission peak is about 420 nm) and can achieve high sensitivity response to hydrogen peroxide. The quenching constants and detection limits of the carbon dots are 7.3 x 10(3)M(-1) and 3.16 microM respectively.

The invention provides a polypropylene-based thermoplastic shielding material for a cable and a preparation method of the shielding material. The shielding material comprises the following componentsin parts by weight: 100 parts of ethylene-propylene block copolymer polypropylene, 3-20 parts of conductive carbon black, 0.5-1.5 parts of high-conductivity graphene, 0.5-1.5 parts of a coupling agentand 1.4-4.5 parts of an auxiliary agent, wherein the auxiliary agent comprises an antioxidant, a lubricant and an anti-bonding agent; and the mass fraction of ethylene fragments in the ethylene-propylene block copolymer polypropylene is 5%-30%. According to the shielding material in the invention, the problem that mechanical properties are reduced due to the fact that high-content conductive carbon black needs to be added for improving the conductivity of a conventional polypropylene-based thermoplastic shielding material for the cable is solved, and the polypropylene-based thermoplastic shielding material for the cable in the invention has excellent conductivity and mechanical properties, and still has excellent conductivity and mechanical properties under a high-temperature condition through cooperation among the ethylene-propylene block copolymer polypropylene, the conductive carbon black and the high-conductivity graphene.

A used large-size photomask substrate having a patterned light-shielding film is recycled by (i) removing the light-shielding film from the used substrate to provide a photomask-forming glass substrate stock, (ii) resurfacing the glass substrate stock by sand blasting, (iii) repolishing the resurfaced glass substrate stock to yield a regenerated glass substrate stock, (iv) applying a light-shielding film onto the regenerated glass substrate stock to yield a regenerated photomask-forming blank, and (v) processing the light-shielding film of the blank into a pattern corresponding to the desired exposure of a mother glass, yielding a regenerated photomask substrate.

The invention discloses a preparation method of a GSH@AgNCs/MgAl-ELDH modified electrode. The method comprises the following specific steps: S1, preparing glutathione-coated silver nano-cluster GSH@AgNCs: preparing a GSH@AgNCs sample by taking glutathione as a stabilizer and sodium borohydride as a reducing agent and adopting a chemical reduction method; s2, preparing a magnesium-aluminum hydrotalcite material: preparing magnesium-aluminum hydrotalcite MgAl-LDH and a magnesium-aluminum hydrotalcite nanosheet MgAl-ELDH by adopting a coprecipitation and formamide stripping method; s3, preparingGSH@AgNCs/MgAl-LDH, and GSH@AgNCs/MgAl-ELDH; and S4, preparing the GSH@AgNCs/MgAl-ELDH modified electrode. The invention discloses a preparation method of a GSH@AgNCs/MgAl-ELDH modified material, a modified electrode is prepared, the electrochemical activity of the electrode is improved, and simultaneous determination of pesticides carbaryl and isoprocarb by the GSH@AgNCs/MgAl-ELDH modified electrode is realized.

The invention discloses a fuel cell operation technology for improving the regeneration rate and electricity generating efficiency of complex iron in the desulfuration process. An air electrode using a single-chamber proton exchange membrane fuel cell as a reactor and using a platinum carbon catalyst serves as a cathode, a carbon material serves as an anode, a desulfurized complex iron solution is added, and a NaOH solution is used for regulating a pH value to be 9-12 under the nitrogen condition so as to seal the cell. The cathode and anode of the cell are connected through a lead, a resistor is connected to the middle and used for measuring voltages at two ends of the resistor, and when the voltages are reduced to be zero, a circuit is disconnected, and an in-situ loaded Fe (III) compound catalyst is obtained from the cathode of the cell. The solution in the cell is replaced by a new desulfurized complex iron solution, the circuit is connected, and the Fe (III) compound catalyst loaded on the cathode enables the coulombic efficiency of the cell and the regeneration rate of Fe (III) in the solution to be remarkably improved.

The invention discloses amorphous zinc oxide with a nanometer hollow sphere structure and a preparation method thereof, which is characterized in that the preparation method comprises the following steps: slowly heating the temperature to 240 to 280 DEG C under the protection of inert atmosphere after zinc stearate of 126.466 milligram is uniformly mixed with hexadecylamine of 2.0 plus or minus 0.5 gram, 1, 2- hexadecane diol of 143.6 plus or minus 30 milligram and trioctylphousphine oxide of 2.0 plus or minus 0.5 gram according to the blending ratio; and obtaining the amorphous zinc oxide with the nanometer hollow sphere structure which has the diameter of 10 to 23 nm when heat preservation is conducted under the action of an active oxygen source, wherein the thickness of the spherical shell of a hollow sphere is 1 to 5 nm and the diameter of a hollow cavity in the hollow sphere is 8 to 13 mm. The amorphous zinc oxide with the nanometer hollow sphere structure prepared by adopting the method has the advantages of small and uniform dimension, large specific area and good dispersivity, and has wide application prospect in the field of drug release, catalytic reaction and micro-reactors and the like.

The invention discloses a preparation method of a lithium ion battery negative electrode material. The preparation method comprises the following steps of growing a nanometer silicon sphere on a surface of graphene; forming a graphene/nanometer silicon composite material; performing sugar coating on the graphene/nanometer silicon composite material; and carbonizing the graphene/nanometer silicon composite material subjected to sugar coating to form a carbon/graphene/nanometer silicon composite material. The preparation method is simple and high in production yield, the nanometer silicon sphereis small and uniform in size, the volume expansion of silicon caused by lithium intercalation and de-intercalation during the charge-discharging process can be effectively reduced by combining the nanometer silicon sphere and the graphene, the internal stress of an electrode is reduced, and the silicon sphere is prevented from being excessively expanded and damaged.

The invention relates to light silicon dioxide aerogel with ultrahigh transparency and ultralow haze as well as a preparation method and application of the light silicon dioxide aerogel. The method comprises the steps of preparing a microreactor; preparing ultra-small silica sol in the microreactor by adjusting the flow velocity of a silicon source precursor, fluorocarbon oil and a catalyst phase and the pipeline reaction temperature; quickly stirring a mixture containing silica sol liquid drops and an oil dispersion phase, standing for layering, quickly freezing, and separating out a silica sol phase; and adding a gel accelerator into the silica sol to obtain wet gel, and carrying out aging, solvent replacement and supercritical drying to obtain the light silica aerogel with ultrahigh transparency and ultralow haze. The nano-particle size of the prepared material is adjustable in a range of 5-10 nm, the highest light transmittance can reach 94.2%, the lowest haze can reach 4.7%, and the light silicon dioxide aerogel shows ultrahigh transparent quality and is widely applied to the fields of transparent heat insulation building glass, solar heat collection systems, Cherenkov detectors, deep space high-speed particle capture and the like.

The invention discloses a sintered gas stone, which is sintered from the following raw materials (by weight ratio), quartz sand 60-70%, sodium feldspar 5-10%, talcum powder 5-10%, mineral wax 10-70%, oleinic acid 0.5-2%.

The invention discloses a method for preparing gamma-Fe2O3 magnetic nano-particles. The method comprises the steps that Fe3+ salt is directly dissolved in dimethylformamide (DMF), the amount of the Fe3+ salt does not exceed the amount of saturated solubility thereof in the DMF, the mixture is evenly stirred into a transparent solution, and then the solution is sintered for 1-4 hours at the temperature of 150-280 DEG C, so that gamma-Fe2O3 magnetic nano-particles are obtained. The method for preparing gamma-Fe2O3 magnetic nano-particles overcomes the defects of tedious process, complex post processing and the like in the prior art, the pH value does not need to be adjusted in the whole preparation process, washing and filter are not needed, no assistant agent or surface active agent is needed, and the method has the advantages of being high in production rate, high in yield and benefit, and capable of achieving large-batch industrial production.

The invention discloses a method for synthesizing chain-globular nano platinum in a self-assembly manner by using bacitracin as a template. The method for synthesizing the chain-globular nano platinum in the self-assembly manner by using the bacitracin as the template mainly comprises the following steps of adding the bacitracin into a hydrochloric acid solution, so as to prepare an obtained first mixture into an acidic bacitracin solution of which the concentration is 0.4mM to 0.6mM, and processing the acidic bacitracin solution in a metal bath for 40min to 60min at 50 DEG C to 70 DEG C; adding a platinum tetrachloride solution of which the concentration is 4mM to 5mM into the bacitracin solution, putting an obtained second mixture into a double-layer gas bath oscillator, and incubating the obtained second mixture for 16h to 22h at a rotary speed of 100rpm to 120rpm and at a temperature of 22 DEG C to 24 DEG C; adding sodium borohydride of which the concentration is 4mM to 6mM into the obtained second mixture, and controlling a dripping speed, wherein a total addition amount is 60[mu]L to 90 [mu]L, a reaction temperature is 23 DEG C to 25 DEG C, and the reaction time is 10min to 20min, so as to prepare the chain-globular nano platinum of which the particle size is 15nm to 30nm. The method for synthesizing the chain-globular nano platinum in the self-assembly manner by using the bacitracin as the template is green and environmentally friendly, and is low in cost, simple in process and easy to operate; the prepared chain-globular nano platinum is good in dispersity, uniform in appearance and high in metal loading rate; the defects that platinum nano particles prepared under a conventional chemical process condition easily coagulate and pollute the environment are overcome.

The invention discloses an impinging-stream-based continuous magnesium hydroxide production process, and relates to a magnesium hydroxide production process. The process comprises the steps that a magnesium salt and precipitant with certain concentration serve as raw materials, an impinging stream reactor is adopted, in the impinging stream reactor, the magnesium salt and the precipitant react at20-90 DEG C, magnesium hydroxide precipitates are generated, the obtained precipitates are aged at 50-120 DEG C for 1-10 hours, then filtering and drying are conducted, and a magnesium hydroxide product is finally obtained. Auxiliary equipment of the process comprises a raw material storage tank, a pump, a flowmeter, a filter, an ageing tank, a dryer and the like. Accordingly, the impinging streamreactor is adopted, the magnesium salt and the precipitant serve as the raw materials, and the magnesium hydroxide product which is high in dispersion, small in specific surface area, uniform in particle size and consistent in crystal form can be obtained. By means of the continuous magnesium hydroxide production process, the materials are mixed rapidly, the reaction is efficient, and residence time distribution is narrow. The process flow is short, the equipment is less, and the product quality is good and stable.