23 results about "Cenosphere" patented technology

This invention relates to the field of non-fired brick preparation technology, specifically disclosing a method for preparing non-fired bricks with recycled concrete aggregate for thermal insulation. The method includes the following steps: (1) Immersing the recycled concrete coarse aggregate in a saturated calcium bicarbonate solution, then removing and drying the coarse aggregate to obtain pretreated coarse aggregate. (2) Taking the following raw materials: 45-62 parts by weight of slag powder, 18-25 parts by weight of silicate cement, 6-10 parts by weight of fly ash cenospheres, 30-40 parts by weight of the pretreated coarse aggregate, 55-70 parts by weight of sand, and 1-2 parts by weight of water-reducing agent. The above raw materials are mixed evenly, and then mixing water is added according to a water-cement ratio of 0.18-0.22. After mixing, the resulting brick is pressed into a blank and naturally cured to obtain non-fired bricks. The method of this invention can effectively reduce the adverse effects of recycled concrete aggregate on the mechanical properties of non-fired bricks, and the non-fired bricks prepared by this invention also have good thermal insulation properties.

The application discloses a method for enhancing the compressive strength of hollow microspheres and relates to the technical field of hollow microsphere processing. Traditional hollow microspheres have internal unevenness during the manufacturing process, especially the voids gather due to thermal diffusion, form a gap, and then form a crack nucleus under the action of stress. The crack nucleus diffuses to the glass surface and develops into a microcrack. In addition, the structure of the glass surface also affects the generation of the microcrack. Under the condition of ultrahigh pressure, these small microcracks directly limit the upper limit of the strength of the hollow microspheres. The application utilizes a water-isostatic pressure resistant equipment to remove the hollow microspheres with small microcracks and other hollow microspheres with low compressive strength, such as eccentricity and multiple cavities, generated in the production process, so as to improve the strength of the remaining whole hollow microsphere products.

Disclosed in the present invention are a wear-resistant high-strength lightening admixture for a drilling fluid, and a preparation method therefor. The lightening admixture comprises the following components in percentages by mass (on the basis of all the components totaling 100%): 65-75% of silicon dioxide, 5-10% of aluminum oxide, 5-10% of diboron trioxide, 5-10% of an alkaline earth metal oxide, 5-10% of an alkali metal oxide, 0.2-3% of a rare-earth element, 0-2% of ferric oxide, 0-2% of manganese dioxide, 0-2% of zirconium oxide, 0-2% of zinc oxide, and 0.2-5% of other trace element materials. The preparation method comprises: crushing, grinding and granulating all the components to prepare precursor particles; and pre-treating the precursor particles, then subjecting same to high-temperature hollow-sphere formation, and then performing a surface treatment to prepare a wear-resistant high-strength lightening admixture for a drilling fluid. The product has the advantages of being environmentally friendly an obvious density reducing effect, lubricating and resistance-reducing functions, no loss of MWD signals, etc.; moreover, the problems of low compressive strength, proneness to breakage, poor wear resistance, etc., of existing low-density hollow glass bead lightening admixtures are solved.

The application belongs to the technical field of building materials, and particularly discloses a semi-flexible pavement grouting material, a preparation method and a use method thereof. The semi-flexible pavement grouting material comprises the following raw material components: high-free calcium belite sulphoaluminate clinker, gypsum, granulated blast furnace slag powder and fly ash cenospheres; wherein the high-free calcium belite sulphoaluminate clinker comprises the following mineral components: anhydrous calcium sulphoaluminate, free calcium sulphate, free calcium oxide, belite and iron phase. The application uses a large amount of industrial waste such as gypsum, granulated blast furnace slag powder, fly ash cenospheres and steel slag powder as main raw materials, and adds high-free calcium belite sulphoaluminate clinker, amorphous calcium aluminate and silica fume and the like, so as to utilize the synergistic effect of the components and prepare a high-strength semi-flexible pavement grouting material. The application effectively solves the problems of low strength, poor water resistance and poor durability of the grouting material under a large amount of gypsum.

The application discloses a wear-resistant high-strength lightening agent for preparing low-density drilling fluid, and the mass content of each component of raw material components is calculated according to 100%: 64-75% of silicon dioxide, 4.5-8% of aluminum oxide, 4.5-9% of boron oxide, 4.5-9% of calcium oxide and magnesium oxide, 5-9% of sodium oxide and potassium oxide, 0.2-2.2% of cerium oxide and lanthanum oxide, 0.3-1.5% of iron oxide and manganese dioxide, and 0.5-5% of other trace element materials. All components are crushed, ground and granulated to prepare precursor particles; the precursor particles are pretreated, high-temperature hollow spheroidized, and then surface treated to prepare the wear-resistant high-strength lightening agent for preparing low-density drilling fluid. The product has the advantages of environmental friendliness, obvious density reduction effect, lubrication and drag reduction, no loss of MWD signal, and the like, and solves the problems of low pressure strength, easy breakage and poor wear resistance of the existing low-density hollow glass microsphere lightening agent.

This invention discloses a tetrachloroaluminate-modified type A molecular sieve, its preparation method, and its application. The invention uses fly ash cenospheres as the main raw material to prepare a type A molecular sieve. Through modification with a mixture of fly ash and tetrachloroaluminate, it exhibits excellent adsorption performance for cobalt, cesium, and strontium ions. The type A molecular sieve prepared in this application has a good synergistic effect with tetrachloroaluminate, effectively solving the problems of complex processes, high costs, and poor adhesion of existing molecular sieve adsorbent preparation methods in the market. 137 Cs, 60 Co, 90 This method addresses the problem of low adsorption rates of major hazardous nuclides in radioactive wastewater such as Sr, and can be used to adsorb radionuclides in nuclear wastewater.

This invention relates to the field of antibacterial and antifouling materials, specifically to a MOF-coated hollow spherical core-shell structure material, its preparation method, and its applications. The core-shell material uses hollow Cu2O spheres as a substrate, with a continuous MOF shell layer coated on the outer surface of the substrate. The diameter of the hollow Cu2O spheres is 200-300 nm, and the shell layer thickness is 40-60 nm. The MOF shell layer covering the outer surface of the hollow Cu2O spheres has a thickness of 80-130 nm. This invention also provides a method for preparing the above-mentioned core-shell structure material, combining hollow structure design with a heterogeneous nucleation epitaxial growth strategy. Using hollow Cu2O spheres as a substrate, a MOF shell layer is grown in situ on its surface, forming a core-shell structure composite material with a tight heterogeneous interface, significantly improving the antioxidant capacity of cuprous oxide. The core-shell material can be directly used as a photocatalytic antifouling agent, suitable for catalytic antifouling and microwave absorption applications.

This invention discloses a preparation process for a composite conductive concrete material made of coal gangue and carbon black, comprising the following steps: (1) Tetraethyl orthosilicate and anhydrous ethanol are mixed to form a pretreatment solution. Carbon black powder is mixed with the pretreatment solution and then ultrasonically treated, and then allowed to stand. After completion, the solid product is separated to obtain the pretreated carbon black. (2) The pretreated carbon black is dispersed in water to form a dispersion, and an alkaline solution is added to adjust the dispersion to alkalinity, and then a heating reaction is carried out. After completion, the solid product is separated, dried, and ground to obtain modified carbon black powder. (3) The following raw materials are taken: silicate cement, coarse aggregate, conductive fine aggregate made of coal gangue, modified carbon black powder, fly ash cenospheres, water-reducing agent, and defoamer. The raw materials are mixed evenly and then water is added and stirred evenly to obtain the conductive concrete material. The process of this invention not only improves the conductivity of concrete, but also overcomes the problem of reduced concrete strength caused by the addition of carbon black.

Process for the preparation of hollow spherical glass particles comprising at least SiO2, Al2O3, and an alkali metal oxide, wherein the process comprises the preparation of precursor particles comprising at least SiO2, Al2O3, and an alkali metal oxide by mixing the starting materials, slurrying the starting materials with water followed by spry-drying and heat-treating the obtained precursor-particles at a temperature from 1000° C. to 1800° C., preferably from 1300° C. to 1600° C. by contacting the precursor particles with at least one naked flame.

The invention discloses a method for preparing gradient foam metal based on fly ash floating bead occupation and product application, and belongs to the field of porous metal materials. The method comprises the steps that fly ash floating beads serve as removable placeholders, the fly ash floating beads and a binder are prepared into a prefabricated body with the porosity gradient, then pores of the prefabricated body are filled with metal melt through seepage casting, after cooling, the floating beads confined in a metal framework are crushed and separated through a mechanical crushing method, and finally the gradient foam metal of the three-dimensional communicating hole structure is obtained. The traditional cognition that fly ash floating beads can only serve as permanent reinforcements is subverted, and low-cost and green preparation of the high-performance gradient foam metal is achieved through the double properties of low cost and easy removal of the fly ash floating beads. The obtained product has the advantages of light weight, high strength and function designability, and has wide application prospects in the fields of aerospace energy absorption structures, efficient heat exchangers, electromagnetic shielding spaces and the like.

This invention belongs to the field of solid waste treatment technology, specifically disclosing a method for preparing artificial cenospheres using solid waste fly ash. The method involves weighing solid waste fly ash, a high-temperature foaming agent, a modifier, and an adhesive, mixing them evenly, and drying the mixture. The resulting mixture is then granulated to form artificial cenosphere blanks. The dried artificial cenosphere blanks are placed in a vortex expansion vitrification furnace for heat treatment. During this process, the modifier transforms into a liquid phase at high temperature and fills the pores of the microspheres. Simultaneously, the gas generated by the high-temperature foaming agent increases the internal pressure of the blank and promotes the formation of a porous structure within the microspheres. Finally, the blanks are cooled in the furnace, resulting in artificial cenospheres with a porous internal structure and a dense, hard glaze layer on the surface. This method is simple, low-cost, and suitable for industrial production. The implementation of this method requires the consumption of a large amount of solid waste fly ash, thus reusing the waste and effectively solving the environmental pollution problem caused by the large accumulation of solid waste fly ash.

The invention discloses a YSZ thermal barrier coating with a controllable non-through pore structure and a preparation method of the YSZ thermal barrier coating, the YSZ thermal barrier coating is formed by YSZ ceramic composite powder through plasma spraying, and the YSZ ceramic composite powder is formed by mixing the following components in percentage by mass: 20-30% of nanocrystalline agglomerated YSZ powder, 20-30% of nanocrystal agglomerated YSZ powder, 5-10% of nanocrystal agglomerated YSZ powder, 5-10% of nanocrystal agglomerated YSZ powder, 5-10% of nanocrystal agglomerated YSZ powder, 5-10% of nanocrystal Micron YSZ (Yttria Stabilized Zirconia) powder accounting for 20 to 30 percent; hollow spherical YSZ (Yttria Stabilized Zirconia) powder accounting for 40%-60%; the porosity of the coating ranges from 6% to 12%, the pore structure is non-through, and pores are distributed in an isolated mode and are not communicated. According to the preparation method, the nanocrystalline agglomerated YSZ powder, the micron YSZ powder and the hollow spherical YSZ powder are mixed, a porous coating microstructure with non-communicated pores is realized through a plasma spraying technology, and the prepared coating has excellent heat resistance, comprehensive mechanical properties and good economical efficiency.

A method for preparing alumina hollow sphere heat-insulating material from chromium production waste residue, relates to a smelting waste residue comprehensive utilization method.The method uses the way of replacing the furnace shell, and lets the liquid of the reduced chromium oxide into the lower part of the furnace shell, and the upper layer covers the alumina melt, which avoids the possibility of the metallic chromium contacting air and being oxidized, and improves the efficiency of the aluminum-chromium residue refining metallic chromium.The invention converts the residue produced in the production of metallic chromium by aluminum thermal method into two products, one is alumina hollow sphere, one is high-grade heat-insulating material; the other is metallic chromium. The two products are both high-priced products, and realize the high-value utilization in the resource comprehensive utilization of aluminum-chromium residue waste residue.

The invention belongs to the technical field of tunnel engineering materials, and discloses a cement-based composite repair material for high ground stress tunnel void damage and a preparation method thereof, the cement-based composite repair material comprises the following components by mass: 250-300 parts of water; the building material is prepared from the following components in parts by mass: 750-950 parts of a cementing material, 300-420 parts of superfine fly ash floating beads, 4-6 parts of a water reducing agent, 4-6 parts of epoxy propoxy trimethoxy silane, 5-8 parts of PE / PVA fibers, 8-20 parts of basalt / micro-steel fibers, 4-8 parts of a CSA expanding agent, 2-5 parts of light calcined MgO, 2-6 parts of an SBR or PU emulsion, 2-4 parts of nano SiO2 and a defoaming agent, wherein the mass percent of the defoaming agent in the epoxy propoxy trimethoxy silane is 3-8%. The repair material has the characteristics of low shrinkage, controlled micro-expansion and high-toughness energy consumption, forms a modulus gradient and an energy consumption transition area on a structure and an interface layer, and realizes smooth transmission of stress-displacement softening and a long-term fitting effect.

This invention relates to the field of concrete pretreatment technology, specifically to a cenosphere drying device for aerated concrete slurry preparation. The device includes a cavity and a blind plate, heating components, and a premixing mechanism disposed within the cavity. The blind plate has a stepped structure. The premixing mechanism includes an exhaust pipe, a washing tower, and a monitoring component. By utilizing a quantitatively prescribed amount of water (which must be added to the aerated concrete itself) as the tail gas washing liquid in the washing tower, intact cenospheres that escape upwards are trapped. By configuring a monitoring component at the discharge end, the actual mass of solid cenospheres carried in the premixed suspension can be calculated in real time. This successfully transforms previously unrecognizable muddy water, which could only be considered environmental wastewater, into a pre-slurry with absolutely accurate and clear water and material data, eliminating drying dust while enabling the non-destructive quantitative recovery of scattered cenosphere aggregates.

The application discloses a kind of positive pressure melting, homogenization method for improving the yield of hollow glass microsphere, belong to the technical field of hollow glass microsphere preparation, including glass batch ingredient, temperature melting, homogenization, water quenching, crushing classification, powder conveying, hollow spheroidization, collection sorting, also include pressurization processing, before temperature melting, first melt furnace is pressurized, control furnace pressure is at 101000Pa-130000Pa, 0.5-1 hour is used;Then temperature melting, temperature 1450~1550 DEG C, melting time 6~7 hours, and carry out stirring homogenization, after homogenization, melt furnace is discharged gas, adjust the air pressure balance in furnace.The application has the advantages that: batch ingredient is pressurized melting, stirring homogenization, realize the uniformity and completeness of reaction between batch ingredient, reach the best melting, homogenization effect, obtain bubble glass liquid absorption better powder method preparation hollow glass microsphere with high-quality glass raw material.

The application discloses light-weight dense-silica hollow sphere heat-insulating material and a preparation method and application thereof, and belongs to the technical field of novel heat-insulating materials.The application uses a special SiO2 hollow sphere structure, uses inorganic adhesive to bond, and makes the SiO2 hollow spheres tightly combine in a sintering process, thereby significantly improving the volume of air in the material, solving the problem of strong hygroscopicity caused by the fibrous aerogel material in the prior art, and being simple in the preparation steps, cheap and easy to obtain in raw materials, and being conducive to realizing large-scale production and being applicable to the field of aviation.

The invention discloses a corundum refractory material for a solid waste incinerator and a preparation method of the corundum refractory material. The corundum refractory material comprises a hollow sphere matrix prepared from corundum, alpha-alumina micro powder, chromium oxide green and an auxiliary agent and a composite hydrogen-resistant coating coated outside the hollow sphere matrix, the auxiliary agent is prepared from pyrophyllite, zirconium oxide, yttrium oxide and cerium oxide; the method comprises the following steps: S1, preparing the hollow sphere substrate; S2, coating the composite hydrogen-resistant coating; by preparing the composite hydrogen-resistant coating with a multi-layer structure, the effects of preventing hydrogen permeation, reducing the hydrogen embrittlement phenomenon, improving the anti-stripping performance of the material under the condition of rapid cooling and rapid heating circulation and providing good corrosion resistance are achieved.

The application relates to the technical field of gas sensor gas-sensitive materials, in particular to a nitrogen dioxide gas-sensitive material based on VTe2 and a preparation method and application thereof. The gas-sensitive material comprises VTe2, the VTe2 is in a hollow spherical structure composed of two-dimensional nanometer thin sheets, the thickness of the two-dimensional nanometer thin sheets is 40-60 nm, and the gas-sensitive material is prepared by one-step hydrothermal method or solvothermal method. The gas-sensitive material provided by the application has good gas sensitivity and selectivity to NO2 gas, can be used for detecting trace NO2 in the environment, the gas-sensitive sensing element prepared by using the gas-sensitive material has good selectivity to NO2 gas, excellent gas-sensitive performance, small influence by environmental humidity, good long-term stability, and good adsorption and desorption to NO2 gas, and can be used for multiple gas detections in a short time.

The invention relates to a castable and a preparation method and application thereof, and belongs to the technical field of metallurgy, the castable comprises the following components by weight: 25-40% of waste alabaster brick, 22-30% of hollow spherical alumina, 15-25% of fly ash, 10-15% of active alumina micro powder, 8-12% of silica powder, 0.3-0.6% of explosion-proof fiber, and 0.2-0.4% of a dispersant; the volume density of the castable is 1.1-1.4 g / cm < 3 >, the compression strength at normal temperature is 30-45 MPa, and the heat conductivity coefficient at 800 DEG C is 0.13-0.15 W / (m.K); the waste agalmatolite brick is used as an aggregate, and the hollow spherical aluminum oxide and the fly ash are added, so that the heat conductivity coefficient and the volume density of the castable are reduced; by adding the explosion-proof fibers and the like, the temperature change resistance of the castable at high temperature is enhanced, and cracking and damage caused by thermal shock are reduced.

This application relates to the field of building materials, specifically disclosing a high-performance recycled sand concrete and its preparation method. The high-performance recycled sand concrete, by weight, comprises 800-900 parts modified recycled sand, 600-650 parts cement, 400-500 parts modified fly ash, 50-80 parts recycled fiber, 30-40 parts MgO expansion agent, 20-30 parts water-reducing agent, and 100-200 parts cenospheres. The modified recycled sand is obtained by modifying recycled sand from waste construction debris after demolition. The modified fly ash is obtained by modifying fly ash from coal combustion waste. The high-performance recycled sand concrete of this application exhibits good comprehensive performance, characterized by high strength, low water absorption, and excellent durability, thus alleviating the shortage of natural sand resources. Furthermore, the preparation method of this application can produce high-performance recycled sand concrete with excellent comprehensive performance.

The present invention is directed to hollow aluminosilicate glass particles and a process for the production thereof. Further, the present invention is directed to an article comprising said hollow aluminosilicate glass particles as well as the use of said particles as a filler for high temperature products, molten metal, injection moulded synthetic materials, flame-retardant insulating foams, cement slurries, mortars, concretes and oil field applications.

This invention discloses a photothermal micro-electrolysis float material, its preparation method, and its application, relating to the field of photothermal interface water evaporation technology. The float material of this invention is made from a specific ratio of iron-carbon composite powder, fly ash cenospheres, binder, pore-forming agent, and deionized water. The preparation process includes the steps of preparing the iron-carbon composite powder, preparing a molding slurry, molding, carbon dot spraying, and drying and sintering. Simultaneously, this invention also provides the application of the photothermal micro-electrolysis float material or the photothermal micro-electrolysis float material prepared by the above method in wastewater purification. The float material of this invention possesses excellent photothermal conversion performance, micro-electrolysis performance, good buoyancy, and mechanical strength. It can efficiently promote VOCs / water separation during wastewater distillation purification using solar energy, improving wastewater treatment efficiency and reducing energy consumption. The preparation method of this invention is simple and easy to operate, using coal-based solid waste as raw material, resulting in low cost and promoting the reuse of coal-based solid waste.