130results about How to "Resistance to scour" patented technology

The invention relates to a protective coating for aerogenerator vanes and a preparation method thereof, wherein the protective coating has the advantages of excellent ultraviolet radiation resistance, abrasion resistance, stain resistance, corrosion resistance, adhesive force and flexibility. The preparation method uses hydroxyl acrylate resin as a base material of the surface protective coating for the aerogenerator vanes and uses the mixture of HDI biuret and HDI tripolymer as a curing agent. The coating consists of a component A and a component B, wherein the component A comprises the following materials in portion by weight: 10 to 55 portions of the hydroxyl acrylate resin, 1 to 5 portions of abrasion resistant and stain resistant auxiliary agent, 0.2 to 0.4 portion of ultraviolet stabilizer, 10 to 15 portions of environment-friendly organic solvent, 15 to 20 portions of pigments and fillers, 2 to 5 portions of delustering agent, 0.15 to 0.55 portion of dispersing agent, 0.01 to 0.3 portion of drying agent, and 0.25 to 0.55 portion of levelling agent; the component B comprises 1 to 15 portions of the HDI biuret and 1 to 15 portions of the HDI tripolymer; and the mass ratio of the component A to the component B is 2-6:1. When in use, the components A and B are mixed and stirred evenly in proportion, and then the mixture is adjusted to proper viscosity for construction by using a spraying method.

The invention discloses a high-alumina lightweight injecting material with low density, low heat conductivity and stable high temperature volume and preparing method, which comprises the following steps: allocating mass percent with 26-55% lightweight mullite skeletal material, 5-20% floating pearl, 3-10% quartz, 10-25% blue spar, 2-10% silica micronized flour, 2-10% alpha-Al2O3, 10-25% pure alumina cement and 0. 5-5% fiber; getting the product. This invention possesses low volume density, small heat conductivity at 1000 deg. c and good high temperature volume stability, which can be used for long-period under 1400 deg. c.

The invention relates to stemming for a taphole of an ore hearth and a preparation method thereof. The technical scheme adopted by the stemming disclosed by the invention lies in that the preparation method comprises the following steps of: firstly using 40-60wt% of bauxite, 5-15wt% of kyanite, 10-20wt% of brown fused alumina fine powder, 5-15wt% of chromium oxide fine powder, 5-15wt% of silicon carbide fine powder, 5-10wt% of silicon micro powder, 1-5wt% of titanium oxide fine powder, 1-3wt% of cerium oxide fine powder, 1-3wt% of bentonite fine powder and 1-5wt% of Al2O3/Si2N2O/SiC/C composite powder as raw materials, additionally adding an oxide additive accounting for 1-5wt% of the raw materials, and pre-mixing the raw materials and the oxide additive for 5-10 minutes in a mixing and grinding machine so as to obtain premix powder; and then adding a retarder accounting for 0.05-0.25wt% of the raw materials and an aluminum dihydrogen phosphate aqueous solution accounting for 7-15wt% of the raw materials to the premix powder, grinding the premix powder, the retarder and the aluminum dihydrogen phosphate aqueous solution for 20-30 minutes in a wet manner, and then performing stemming extrusion and shaping through a stemming extruder so as to obtain the stemming for the taphole of the ore hearth. The stemming for the taphole of the ore hearth prepared by the preparation method disclosed by the invention has the characteristics of being low in cost, high in intensity, excellent in washing resistance and excellent in corrosion resistance.

The invention discloses a preparation method of a heat-insulating ceramic phenolic resin-based gradient composite material. Fiber cloth is used as a reinforcing phase, and the fiber cloth is respectively dipped in different gum dipping solutions with the phenolic resin as a matrix and contents of ceramic components and hollow microbeads in gradient distribution to prepare a prepreg; laminating, die pressing and thermal curing molding at 150-200 DEG C to obtain the gradient composite material comprising a heat-proof layer, a gradient transition layer and a heat-insulating layer. When the temperature of the gradient composite material is as high as 1000 DEG C, the heat-proof layer can be converted into a ceramic phase with higher strength and can resist heat flow erosion; the gradient transition layer can relieve stress concentration and reduce stress; and hollow microspheres are added to guarantee that the heat-insulating layer has good thermal matching performance.

The invention relates to a mold releasing coating for a centrifugal casting and a painting method of the mold releasing coating, in particular to a mold releasing coating for a nuclear power station main pipe in the centrifugal casting and a painting method of the mold releasing coating. The mold releasing coating comprises a base coating and a surface coating, wherein the base coating is used for coating the surface of a cast mold, and the surface coating is used for coating the base coating layer on the surface of the cast mold. The base coating comprises a component A, a component B, a component C and a component D, wherein the component A is graphite powder, the component B is bauxite or kieselguhr, the component C is talcum powder, and the component D is silica solution or aluminum phosphate. The surface coating comprises a component E, a component F, a component G, a component H and a component I, wherein the component E is quartz powder or high-aluminum powder or zirconium oxide powder, the component F is zirconium silicate powder or zircon powder or emery powder or bauxite, the component G is silica powder or kieselguhr, the component H is boracic slag powder, and the component I is a hydroxymethyl cellulose water solution or polyacrylamide hydroxyl or sodium alginate.

The invention discloses a patching material for a carbonless ladle working lining, which comprises the following components in parts by weight: 75 to 85 parts of high aluminum aggregate, 5 to 15 parts of magnesia, 3 to 5 parts of adhesive and 7 to 9 parts of micro powder. The high aluminum aggregate and magnesia are used as main raw materials, a certain amount of adhesive is supplemented, and the micro powder is added to promote burning to obtain the patching material for the carbonless ladle working lining. The patching material has a good adhering property, is easy to apply and easily sintered at high temperatures, has stronger erosion resistance to molten steel and steel slag, and effectively protects the working lining. After the practice, the patching material has good effects.

The invention belongs to the technical field of preparation processes of ceramics and specifically relates to a zirconia toughened alumina ceramic cylinder sleeve. The zirconia toughened alumina ceramic cylinder sleeve comprises the following components in percentage by weight: 60-70% of alumina, 20-30% of zirconia, 1.2-1.5% of yttrium oxide, 0.5% of lanthanum oxide and 3-3.3% of magnesium carbonate and is prepared by the process flow comprising the steps of ball milling, mixing, granulation, molding and sintering. The produced ceramic cylinder sleeve has the advantages of corrosion resistance, acid and alkali resistance and high temperature resistance, and can work in drilling mud or other liquid media with strong corrosiveness, and the hardness is sufficient to resist grinding or scoring of various solid-phase particles with sharpness or strong grinding property in the high-pressure mud. The ceramic microstructure is uniform, and the surface gloss is high, so that the zirconia toughened alumina ceramic cylinder sleeve is favorable to prolonging the service life of a piston. The ceramic cylinder sleeve is high in working pressure and can meet the requirements of drilling deep wells and ultra-deep wells.

The invention belongs to the field of side slope and bank slope protection engineering, and discloses an anti-seepage and anti-freezing protection system for bank and side slopes of a reservoir in a cold region. The anti-seepage and anti-freezing protection system comprises a foundation embedded in the side slope. A gravel cushion layer, a composite anti-drainage plate and a Renault protection padare sequentially laid from inside to outside on the slope surface of the side slope from the foundation to a set height of the side slope, wherein the set height of the side slope is higher than a surge water level. The anti-seepage and anti-freezing protection system further comprises one-way drainage pipes, wherein the one-way drainage pipes comprise a bottom one-way drainage pipe and a top one-way drainage pipe. The water inlet section of the bottom one-way drainage pipe penetrates through the foundation and extends into the side slope. The water inlet section of the top one-way drainage pipe penetrates through the Renault protection pad, the composite anti-drainage plate and the gravel cushion layer sequentially and extends into the side slope. The invention further discloses a construction method of the anti-seepage and anti-freezing protection system for the bank and side slopes of the reservoir in the cold region. The anti-seepage and anti-freezing protection system is simple in structure, reliable in function, convenient to construct, long in service life, and capable of effectively preventing erosion damage and seepage damage to the bank and side slopes of the reservoir,greatly weakening freezing and thawing damage to the side slope, and ensuring long-term stability of the bank and side slopes of the reservoir.

The invention provides an artificial sponge soil for urban green space, and relates to the technical field of artificial soil. The artificial sponge soil for urban green space includes a surface layerof buffering pervious bed and a ground layer of aquifer, wherein the buffering pervious bed comprises the following components in a volume ratio: 35%-45% of sandy soil, 20%-30% of industrial and mining waste, 15%-25% of agricultural and forestry waste decomposed substrate, 15%-25% of perlite, 0.5%-1% of granule agent, and 0.5%-1% of stabilizer; the aquifer includes the following components in a volume ratio: 30%-40% of clay soil, 20%-30% of agricultural and forestry waste decomposed substrate, 0.1%-1% of granule agent, 5%-15% of bentonite, 10%-15% of vermiculite, 15%-25% of plant fiber, 0.05%-1% of microbial agent, and 2%-8% of fertilizer; the thickness of the buffering pervious bed is 3 cm to 10 cm; and the thickness of the aquifer is 10 cm to 30 cm. The artificial sponge soil for urbangreen space has the characteristics of strong water permeability, high water storage capacity, good erosion resistance and the like, thus being able to improve the quality of rainwater infiltrated into the soil, reduce pollution to urban groundwater, achieve the purpose of rainwater infiltration, storage and purification, and greatly reduce the high cost of sponge city construction.

Disclosed si a non-preheat composite structure long nozzle liner material, and relates to the field of functional refractories for continuous steel casting. The ingredients include 20-50wt% of corundum, 10-50wt% of electric-melted zirconia mullite, 15-40wt% of fused silica, 5-20wt% of light burned alumina and 5-15wt% of zinc oxide, and 5-10% of phenolic resin of the total weight of the liner material is added as a binder. The liner material has high porosity, low thermal expansion coefficient and thermal conductivity, and is capable of resisting scour and erosion of molten steel well.

The present invention discloses a filling concrete, which comprises a concrete mixture, a concrete admixture and a cementing material, wherein the concrete mixture is inert powder, the concrete admixture comprises one or a plurality of materials selected from an anti-dispersing agent, a tackifier and a high-performance polycarboxylate water-reducing agent, the use amount of the cementing material is 270-400 kg/m<3>, the sand rate is 45-52%, and the water-cement ratio is 0.56-0.85. According to the present invention, the concrete has good flowing performance, can achieve the self-leveling effect under water, has good underwater non-dispersibility, and can effectively resist seawater erosion, wherein the zero bleeding rate of the concrete can ensure the immersed tube foundation post-filling fullness in a seawater environment.

Immersed tube joint grouting concrete is disclosed. The concrete includes, by weight, 25-50% of a concrete admixture, 5-20% of inert powder, 1-2% of a water reducer, 0.2-0.5% of an anti-dispersion agent, 1-5% of a thickening agent, 5-8% of an expanding agent, other binding materials and water, wherein the total using amount of the binding materials is 450-500 kg/m<3>, and the water-binder ratio is 0.34-0.45. According to some properties of the concrete, the degree of slump extension is 600-700 mm, the concrete is non-dispersible under water, the cement loss amount is less than 3.0%, the content of suspended compounds is less than 150 mg/L, and the bleeding rate is 0. The concrete admixture is one or more of coal ash and pelletized blast furnace slag. The inert powder is one or more of limestone powder, gangue, zeolite powder and fine quartz powder. The concrete has a characteristic of resisting sea water brushing in a marine environment, can fully fill component pores, can avoid holes, and has outstanding performance in the field of preventing sea water erosion, and the like.

The invention discloses an antifreeze anti-erosive protection structure of a hydrous slope of a cold region. The antifreeze anti-erosive protection structure of the hydrous slope of the cold region comprises a foundation, wherein the foundation is arranged on a riverbed at a slope toe of a bank side slope; the top surface of the foundation and the top surface of the riverbed have the same height;an XPS insulation board and a composite drainable waterproofing plate are sequentially arranged from the inner side to the outer side on the side slope surface of the bank side slope from the top surface of the foundation to the top part preset height; the outer side of the composite drainable waterproofing plate is provided with a gabion retaining wall from the top surface of the foundation to the surge height; the outer side of the composite drainable waterproofing plate is provided with a reno mattress from the surge height to the top part preset height; the top part preset height is largerthan the surge height; and one-way drainage pipes are arranged in a plum blossom dot matrix way on the side slope surface of the bank side slope between the top surface of the foundation and the toppart preset height. The invention further discloses a construction method of the antifreeze anti-erosive protection structure of the hydrous slope of the cold region. The antifreeze and anti-erosive capacities of the hydrous slope of the cold region can be effectively improved.

The invention relates to the field of flat gate valves, in particular to an improved flat gate valve. A valve seat is placed in a valve body; a valve plate is tightly matched with the valve seat; one end of a valve rod is connected with a gate plate, and other end of the valve rod is connected with an operating mechanism; a valve cover is fixedly connected with the valve body; the bottom of the cavity of the valve body is provided with a drain hole; tungsten carbide alloy protrusions are sprayed on sealed areas or/and guide areas on two sides of the gate plate; the appearance of the gate plate is an automatic positioning and guide structure; and the bottom end part of the gate plate is provided with an arc groove structure. The improved flat gate valve has the advantages that: a real hard sealed flat gate valve is realized through the tungsten carbide protrusions and can resist abrasion, scratch and scour of all granules except diamond, and the service life of the valve is prolonged. Compared with total spraying, the spraying cost is saved by 75 percent. Because the whole convex surface is made of a material (tungsten carbide), the grinding process becomes easier compared with a large plane inlaid by two materials.

The invention particularly relates to a green environmental-protection stemming for a taphole of a submerged arc furnace and a preparation method thereof. The preparation method comprises the steps: firstly, taking 45-65 wt% of bauxite, 5-15 wt% of kyanite, 5-15 wt% of fine quartz powder, 1-3 wt% of fine andalusite powder, 10-30 wt% of alumina micro-powder, 0.5-2 wt% of montmorillonite micro-powder, 1-2 wt% of fine elementary substance silicon powder, 0.5-1 wt% of earthy graphite micro-powder and 1-2 wt% of fine Ti3SiC2 powder as raw materials, then additionally adding 0.05-0.1 wt% of polypropylene fibers, 0.05-0.3 wt% of a retarder, 0.5-2 wt% of ZrOCl2.8H2O and 8-20 wt% of an aluminum dihydrogen phosphate aqueous solution according to the raw materials, wet-grinding for 15-30 min, and then extruding and molding by a mud extruder, and thus obtaining the green environmental-protection stemming for the taphole of the submerged arc furnace. The preparation method has low cost and environmental friendliness, and the prepared green environmental-protection stemming for the taphole of the submerged arc furnace has the advantages of high strength, good volume stability, excellent washing-out resistance, excellent corrosion resistance and repairability for the taphole.

The invention discloses a polymer electrolyte and a preparation method thereof and a solid-state lithium-air battery. The preparation method comprises the following steps: preparing a metal-organic framework material by adopting a solvothermal method, and mixing the metal-organic framework material with lithium-containing ionic liquid to obtain a composite filler; and taking a polyether polyurethane elastomer as a matrix, and mixing the polyether polyurethane elastomer with the composite filler to obtain the polymer electrolyte. The polymer electrolyte has excellent conductivity and stability,can effectively improve the safety and stability of the solid-state lithium-air battery when being used in the solid-state lithium-air battery, and enables the solid-state lithium-air battery to maintain excellent charge-discharge performance and cycle performance so as to meet the requirements of practical application. By adopting the mode, the composite filler can be loaded on the polyether polyurethane elastomer, and the polymer electrolyte prepared by utilizing the soft segment and the hard segment of the polyether polyurethane elastomer has excellent electrical conductivity and mechanical property, so that the electrical conductivity and the stability of the polymer electrolyte are effectively improved.

The invention discloses a method for preparing a super-high temperature anti-oxidation composite material and belongs to the technical field of aerospace materials. The method comprises the following steps: firstly, performing washing, combing, net overlapping and puncturing on a polyacrylonitrile pre-oxidized fiber in sequence so as to obtain a felt; further performing carbonization and activation with water steam so as to obtain a polyacrylonitrile-based activated carbon fiber felt; further performing electrochemical oxidation treatment, and mixing and soaking with ball-milling slurry consisting of aluminum nitride, boron nitride, absolute ethyl alcohol and organic silicon; further performing pre-sintering in the presence of argon, performing secondary soaking, and performing hot-pressing sintering molding in the presence of argon, thereby obtaining the super-high temperature anti-oxidation composite material. The product prepared by using the method is high in density and excellent in sintering erosion resistance and high-speed air flow impact resistance, is capable of meeting use requirements of high-temperature conditions of 2000 DEG C or greater, and has wide application prospects.

The invention discloses a high-speed railway door system rubber sealing strip protection grease composition and a preparation method thereof, and belongs to the technical field of sealing greases, wherein the raw materials comprise, by weight, 40-80% of base oil, 10-50% of a thickener, 0-20% of a filler, 0.5-5% of a metal corrosion inhibitor, and 0-5% of an antioxidant, The invention further provides a preparation method of the protection grease composition, wherein the raw materials are subjected to thermal insulation activation, heating smelting and stirring grinding to prepare the high-speed railway door system rubber sealing strip protection grease composition. According to the present invention, the inert substance is used to form the perfluoropolyether lubricating grease type high-speed railway door system sealing grease, such that the obtained grease composition has characteristics of extremely low oil separation rate, white color, no pollution, and excellent high-low temperature stability; the good sealing property is ensured while the good protection performance is provided for the sealing glue strip and the metal member, such that the grease composition is the ideal high-speed railway door system sealing grease; and the preparation method is simple, is easy to control, and is suitable for industrialization.

The invention discloses a plugging agent, and a preparation method and application thereof, and belongs to the technical field of oilfield chemistry. The plugging agent comprises, by weight, 20-40 parts of mica for covering self-solidifying materials, 25-45 parts of walnut shells for covering the self-solidifying materials, 5-20 parts of mineral fibers for covering the self-solidifying materials,3-15 parts of quartz sand for covering the self-solidifying materials, 0.3-1.5 parts of viscous polymers and 150-250 parts of water; the total mass of the self-solidifying materials in the plugging agent accounts for 3-15% of the total mass of the mica, the walnut shells, the mineral fibers and the quartz sand. The self-solidifying materials in the plugging agent undergo a polycondensation reaction at a downhole temperature to form three-dimensional resin, so that the solidification force between the components of the plugging agent is improved, scouring of drilling fluids can be effectively resisted, and the strength of a plugging layer and the success rate of plugging are increased; the success rate of plugging of the plugging agent can reach more than 90%, and the economic loss caused by plugging failure is reduced.

The invention discloses a plate-and-frame type river sediment ecological protection slope for sponge city construction and a preparation method thereof. The protection slope comprises an obliquely-arranged slope body, and a plurality of ecological basins which are arranged on the surface of the slope body and form a step shape, wherein the interior of each ecological basin is provided with an ecological module unit; and each ecological module unit is successively provided with a gravel layer, a silt layer and an aquatic plant layer from bottom to top. The preparation method for the protectionslope provided by the invention comprises the following steps: building the slope body, allowing the plurality of the ecological basins to be arranged on the slope body, and respectively filling eachecological basin with the gravel layer, the silt layer and the aquatic plant layer. The protection slope provided by the invention has the following significant advantages: the protection slope adoptsan integral ecological protection slope system, can effectively protect the stable ecological structure of a side slope, fully utilizes the value of river sediment during preparation to form the ecological basins with an ecological mode of sediment improved soil, porous water-permeable bricks and amphibious plants, has the characteristics of convenient construction, ecology, beautiful appearance,high silt utilization rate, etc., is easy to maintain and has low cost.

The invention belongs to the technical field of a ceramic preparation technology, and particularly relates to a preparation technology of a ceramic cylinder liner of a drilling mud pump. The preparation technology comprises the steps of putting 70-78wt% of alpha-aluminum oxide, 20-30wt% of zirconium oxide containing 5.7wt% of yttrium oxide, 0.5wt% of lanthanum oxide with purity of 99.99% and 0.5wt% of lanthanum oxide and silicon dioxide into a ball mill, and performing ball milling, drying and sintering to obtain a finished product. By adopting the technology, the processed ceramic can overcome the chalking phenomenon of zirconium oxide as well as the shortcoming of low fracture toughness of aluminum oxide, and the produced ceramic cylinder liner is resistant to corrosion, acid and base and high temperature and can work in media such as drilling mud, other liquids with strong corrosivity and the like; the hardness is enough to resist the grinding or scouring of various sharp or high-abrasiveness solid-phase particles in high-pressure mud.