264 results about "Erosion resistance" patented technology

The invention provides a concrete super-early-strength quick-hardening material, and relates to the field of building materials. The high-strength concrete comprises the following components in percentage by mass: 40%-50% of calcium aluminate, 30%-40% of gypsum, 8%-15% of high aluminum, 1%-3% of an additive, 3%-12% of an exciting agent and 1%-5% of an auxiliary material. According to the super-early-strength quick-hardening material provided by the invention, hour-level strength can be quickly and stably improved, and the strength increasing curve of each age is smooth and stable, so that the requirements of scenes such as road repair and tunnel construction on early strength can be met; it can be guaranteed that the 28-day compressive strength of the material breaks through 70 MPa, the later strength is kept stable, and the long-term safety of an engineering structure is guaranteed; the anti-seepage, anti-freezing and anti-erosion capabilities are realized in a complex environment, the service life of a project can be effectively prolonged, and the maintenance cost is reduced. In addition, the invention further provides a preparation method of the concrete super-early-strength and quick-hardening material, and the preparation method is used for preparing the super-early-strength and quick-hardening material provided by the invention.

The invention provides a hot-state repairing material and a preparation method thereof, and belongs to the technical field of refractory materials. The hot-state repairing material provided by the invention is prepared from the following raw materials in percentage by mass: 87 to 98 percent of waste bricks, 0.5 to 4.5 percent of magnesium mineral micro powder, 0.5 to 5.0 percent of slag powder, 0.5 to 2.0 percent of dispersing agent, 0.2 to 1.5 percent of organic fiber and 0.1 to 0.5 percent of binding agent. According to the invention, waste bricks are used as aggregates, contain tiny pores, provide channels for reaction gas for heating the hot-state repairing material, and can be rapidly sintered with a furnace lining; the slag powder can be matched with the binder to improve the thermal adhesion rate of the thermal repairing material; the magnesium mineral micro powder can improve the reaction activity, and the dispersing agent assists the combination effect of the slag powder, so that the repairing material can be sintered through rapid reaction, and the compression strength and the erosion resistance are improved; and the organic fibers can form good filling among particles and fine powder, so that the compression strength and the erosion resistance are improved.

The invention discloses sulfate-erosion-resistant metakaolin-slag-based geopolymer concrete, belongs to the technical field of concrete, and aims to solve the problems that the corrosion resistance of traditional silicate concrete is ineffective and the adaptability of conventional alkali-activated concrete is insufficient in a special environment. The concrete comprises the following components in parts by weight: 60-90 parts of a cementing material, 120-170 parts of aggregate, 15-30 parts of a composite activator, 2-8 parts of a function regulator and the like, the cementing material is prepared from nano TiO2 / KH-550 composite modified metakaolin, slag and silica fume-coal gangue powder-HAP composite powder; the aggregate comprises modified limestone macadam (soaked and dried by a sodium dihydrogen phosphate solution) and river sand; the composite exciting agent comprises water glass, sodium hydroxide, sodium pyrophosphate, propylene glycol and the like; the function regulator comprises superfine fly ash, a naphthalene water reducer, HPMC (Hydroxy Propyl Methyl Cellulose) and boric acid. Through the synergistic effect of the components, the sulfate corrosion resistance, the mechanical property and the environmental adaptation performance of the concrete are improved, and the concrete is suitable for engineering construction under the service environment of high-concentration sulfate and the like.

The invention discloses a clay stabilizer for a high-temperature environment and a preparation method of the clay stabilizer, and belongs to the technical field of oil field oil extraction auxiliaries. The preparation method comprises the following steps: mixing and stirring quaternary ammonium salt modified silicon dioxide and modified acrylamide according to a mass part ratio of 1: (5-6) to obtain the clay stabilizer. The clay stabilizer is obtained by mixing quaternary ammonium salt modified silicon dioxide and modified acrylamide, so that not only is the anti-swelling performance improved, but also the scouring resistance is improved.

The invention discloses a chitin-silicon-calcium-based modified material for rammed earth wall repair and a weather resistance evaluation method thereof, and belongs to the technical field of rammed earth wall repair, the chitin-silicon-calcium-based modified material comprises metakaolin, calcium oxide, quartz and chitin; the ratio of chitin to metakaolin to calcium oxide to quartz is 1: 1: 2: 4; the method comprises the following steps: pre-treating at the earlier stage of a test, evaluating freeze-thaw cycle performance, evaluating dry-wet cycle performance, evaluating salt corrosion resistance, analyzing association between a microstructure and a strength performance, and finally, revealing a material degradation rule and mechanism by combining scanning electron microscope observation, unconfined compressive strength test and crack rate analysis. When the freezing and thawing cycle number N is less than or equal to 5, the dry and wet cycle number I is less than or equal to 9, and the salt solution concentration c is less than or equal to 0.3 mol / L, the characteristics of freezing and thawing resistance, dry and wet resistance, salt erosion resistance and the like of the modified material are obviously improved; after the modified material is added, internal pores of plain soil can be filled, unconfined compressive strength of a soil body is enhanced, and long-term durability of the soil body is improved.

This invention discloses a method for improving the wear and corrosion resistance of impact rollers, relating to the field of impact roller manufacturing technology. The method includes the following steps: S1: Milling the easily worn areas on the impact roller to form a filled area; S2: Filling the filled area with high-strength, wear-resistant martensitic stainless steel as the filler material, and performing laser cladding; S3: Processing the laser cladding position to match the profile of the impact roller; S4: Aging the processed roller at a temperature below the initial austenite transformation temperature (Ac1); S5: Grinding the surface of the aged impact roller until smooth. This invention can effectively improve the surface strength, hardness, and wear and corrosion resistance of impact rollers.

The invention provides a heat dissipation plate machining process. The heat dissipation plate machining process comprises the steps that an aluminum alloy plate is subjected to sand blasting roughening after being machined; after sand blasting, staying for 5-30 minutes in an environment with the temperature of 25-40 DEG C and the relative humidity of 60-85 Sequentially carrying out first liquid pulse treatment and second liquid pulse treatment by adopting an atomization mode at an interval of 20-120s, and controlling the liquid loading capacity to be in a film state; then carrying out medium-temperature heat treatment at 60-100 DEG C to fix an interface state; and directly carrying out zirconium-series non-phosphorus conversion film treatment on the premise of no acid pickling or alkali etching, and cleaning and inspecting the zirconium-series non-phosphorus conversion film. According to the technology, through cooperative adjustment of temperature and humidity retention and double-pulse film treatment, the state fluctuation of the sand blasting surface is reduced, and the film forming uniformity, adhesive force and corrosion resistance of a conversion film are improved.

The invention provides a high-temperature-erosion-resistant Fe-based amorphous coating welding wire and a preparation method, and belongs to the technical field of metal materials. The welding wire comprises a flux core and a welding skin. Wherein the flux core comprises 25%-28% of Cr powder, 23%-25% of Nb powder, 8%-10% of B powder, 8%-10% of Si powder, 15%-17% of Mo powder, 8%-10% of W powder and the balance Fe powder; and the welding skin is a Fe60Cr40 steel strip. According to the novel Fe-Cr-Nb-B-W-Si-Mo series amorphous alloy welding wire, by optimizing the proportion of multiple components, the coating is endowed with excellent wear resistance, high temperature corrosion resistance and erosion resistance while the high amorphous content is ensured. The welding wire can adopt a conventional electric arc surfacing process, efficient protection of the surface of the water cooling wall is achieved under the low-cost condition, and an innovative solution is provided for long-acting protection of key components of a power plant.

The application discloses a soil-rock dam reinforcing and enhancing structure for preventing over-standard overflow dam break and a construction method thereof. The structure comprises a soil-rock dam filling body, a vertical anti-seepage core wall arranged in the soil-rock dam filling body, and a composite high-strength fiber three-dimensional membrane arranged on the surface of the dam slope after regulation. The membrane body is unfolded along the slope surface and is reinforced by a pressing plate type fixing anchor bolt and a fiber membrane three-dimensional rivet. The row-to-row spacing of the fixing anchor bolt is 20-50 cm, so that the composite membrane is tightly attached to the dam body. The rigid structure and the flexible protection material are organically combined, the dam body's erosion resistance and durability are significantly improved while the flood discharge capacity is ensured, the construction method is simple, the cost is low, and the method is suitable for flood control reinforcement and safe operation of various soil-rock dams.

The invention discloses a copper smelting anode furnace burner block and a manufacturing method thereof, and belongs to the technical field of metallurgical kiln refractory materials. The copper smelting anode furnace burner block is prepared from the following raw materials in percentage by mass: 85 to 89 percent of Al2O3, 6 to 10 percent of ZrO2, 4 to 5 percent of Cr2O3 and 0.5 to 1 percent of SiO2. Compared with a common shaped refractory brick serving as the anode furnace burner brick, the novel castable is adopted for pouring the burner brick, integral forming is achieved, the burner brick has high physical and chemical properties and high compression resistance and shock resistance, corrosion resistance and erosion resistance are achieved, the service life is greatly prolonged, the repairing frequency of the burner brick is reduced, and the service life of the anode furnace is prolonged. And the use cost is reduced by more than 50%.

The method comprises the following steps that S1, dry materials and a binding agent are provided, and the dry materials comprise 19 wt%-24 wt% of intaglio corundum with the particle size being 3-5 mm, 22 wt%-35 wt% of intaglio corundum with the particle size being 1-3 mm, 12 wt%-19 wt% of white corundum with the particle size being 0-1 mm, 18 wt%-24 wt% of white corundum fine powder with the particle size being smaller than 200 meshes and 2 wt%-4 wt% of composite metal powder; s2, the dry material and a binding agent are mixed and ground, and a mixed and ground material is obtained; and S3, molding and drying the mixed and ground material to obtain the fire-resistant heat-insulating brick. The refractory brick produced by adopting the inked corundum and the white corundum as main raw materials, adding the composite metal powder and adding the additional binding agent has the advantages of high strength, good thermal shock resistance, good permeability resistance, good erosion resistance and long service life, and can be widely applied to rotary kilns, cement kilns and other parts.

This invention relates to a composite bellows compensator inner wall protection structure, the bellows compensator itself, and its design method. The inner wall protection structure is a composite layer structure, including an anti-erosion functional layer, a transition fixing layer, and a bellows substrate. The anti-erosion functional layer includes an outer ceramic plate and an inner ceramic plate. The transition fixing layer includes an outer ring plate and an inner ring plate, which are spaced radially and staggered axially, forming a non-rigid connection structure. The inner walls of the outer and inner ring plates are respectively provided with the outer and inner ceramic plates. The bellows substrate is made of thin metal sheet and has a corrugated structure, used to realize the displacement compensation function of the bellows compensator. One end of the outer ring plate is fixedly connected to the inner wall of the bellows substrate. This invention effectively improves the wear resistance, deformation coordination, and overall operational reliability of the bellows compensator under complex working conditions by constructing a composite protection system on the inner wall of the bellows that combines high erosion resistance and good deformation adaptability.

This invention belongs to the field of metallic materials technology, and relates to a laser-based anti-corrosion and wear-resistant material and repair process for repairing impact turbines. The material comprises the following components by mass percentage: Cr: 10-20%; Co: 10-20%; Nd: 1.5-2.5%; Ni: 3-8%; C: 0.01-0.2%; Nb: 0.1-1%; W: 1-5%; V: 0.1-1%; Mo: 0.8-1.2%; Mn: ≤3%; Ti: 0.01-0.1%; N: 0.10-0.5%; Si: 0.1-0.2%; P: 0.01-0.05%; Fe: balance. The repair method of this invention shortens the labor time required for programming irregularly shaped sections, simplifies the complex programming process, and greatly improves production efficiency. After laser repair, the turbine was tested by flaw detection, hardness testing and actual operation testing, all of which proved that the material’s erosion resistance and corrosion resistance met the requirements for normal use. No cracks, cavitation, wear or missing material appeared again in the repaired area.

The present application relates to the technical field of complex shape remanufacturing, in particular to a complex shape remanufacturing method and material for a desulfurization circulating pump impeller, the complex shape remanufacturing method comprising constructing a multi-modal damage intelligent mapping; synchronously preparing plasma activation and micro-texture; performing energy field coupling cladding repair; performing stress field balance shot peening strengthening; implementing gradient coating self-propagating synthesis; performing thermal-mechanical coupling precision shaping; performing micro-gap pressure infiltration sealing; and performing multi-physical field service simulation verification. The present application can significantly prolong the service cycle of key components, comprehensively enhance the comprehensive performance of anti-cavitation and erosion resistance, establish a digital twin closed loop of damage diagnosis, repair optimization and life prediction, and simultaneously realize life cycle cost control and resource saving. Not only can the present application repair failed components, but also can it rebuild a sustainable operation system.

The application provides a coal quality improving and caking enhancing dust inhibitor and a preparation method thereof. Through synergistic effect of components, the coal quality improving and caking enhancing dust inhibitor can not only form a tough solidified film on the surface of coal, effectively inhibit dust flying and reduce coal loss, but also improve apparent calorific value of coal and improve coal quality through catalytic oxidation and pore filling mechanism. A composite wetting system can significantly reduce surface tension of a solution, and enhance the penetration and wrapping capacity of coal dust. A bonding system can form a solidified film with a three-dimensional network structure, and provide excellent wind erosion resistance and mechanical strength. Meanwhile, the quality improving and caking enhancing system can form a dense oxidation layer by catalyzing oxidation of light components on the surface of coal, and adsorb moisture, thereby reducing volatile loss and improving the calorific value of coal. In addition, the use of auxiliary components ensures the stability and environmental friendliness of the product under different environmental conditions. The preparation method is reasonable in process design, the product is stable in performance, and is suitable for industrial production.

The invention discloses a novel nano-coating cast steel brick and a preparation method thereof. The cast steel brick comprises a cylindrical refractory matrix, a double-layer nano coating and a modified metal reinforcing belt, wherein the double-layer nano coating comprises a nano aluminum oxide bottom layer and a functional layer containing a sol-gel pre-coated graphene-ceramic composite material. According to the preparation method, pulse vibration forming, a sol-gel pre-coating technology and a carbon thermal reduction protective atmosphere sintering technology are adopted, the graphene-ceramic composite material has an Al2O3-BN double-layer ceramic coating layer protection structure, and the structural stability of graphene at the high temperature is ensured. The technical problems of low refractoriness, poor corrosion resistance and short service life of a traditional cast steel brick are solved, the refractoriness is improved by about 6%, the corrosion resistance is improved by 78%, the thermal shock stability is improved by about 79%, the single use performance is improved by 250%, and the cast steel brick is suitable for molten steel flow control in a continuous steel casting process.

The invention relates to the technical field of roadbed slope protection, discloses a roadbed slope protection composition based on solid waste-geopolymer and a construction method of the roadbed slope protection composition, and aims to solve the problems of high carbon emission, low solid waste utilization rate, strong ecological destructiveness and weak disaster resistance of a traditional roadbed slope protection material. According to the invention, fly ash, desulfurized gypsum, mineral powder and pretreated red mud are taken as core raw materials, and are matched with a geopolymer activator and a heavy metal stabilizer to form a cement-free flow state system with a high solid waste mixing ratio; during construction, a casing pipe is not needed, through the drilling-layered pouring technology, the solidification body is naturally attached to soil through the fluidity, a multi-deformation solidification structure without rigid cutting is formed, the anti-scouring and anti-collapse capacity of a roadbed slope can be enhanced through the structure, damage of natural disasters such as flood to a roadbed can be effectively resisted, and the construction period is shortened. Meanwhile, the ecological compatibility of the mechanical property and the plant root system penetration rate is considered.

The utility model discloses an anti-erosion magnetic drive pump with efficient isolation, which belongs to the technical field of magnetic drive pumps and comprises a pump body, an isolation sleeve and a stepped sealing ring. Flange plates are arranged at the two ends of the isolation sleeve, the isolation sleeve is connected with the pump body through the flange plates, the isolation sleeve comprises an inner sleeve and an outer sleeve, the inner sleeve is arranged in the outer sleeve and fixedly connected through bolts, the inner sleeve is made of corrosion-resistant materials, the outer sleeve is made of compression-resistant materials, an annular groove is formed in the inner wall of the inner sleeve, and an eddy current restraining piece is embedded in the groove. The stepped sealing ring is arranged at the connecting end of the isolation sleeve and the pump body and sequentially comprises a first-stage ring, a second-stage ring and a third-stage ring from inside to outside, and stepped fall is formed among the rings. According to the magnetic drive pump, pressure resistance and corrosion resistance are both considered, the service life is prolonged, energy loss is reduced, the comprehensive efficiency of the magnetic drive pump is improved, the inner sleeve or the outer sleeve in the isolation sleeve can be rapidly replaced, the maintenance time is shortened, the step sealing ring is adopted, the leakage risk is remarkably reduced, and the maintenance cost is low.

The utility model discloses an ecological vegetation restoration device for river and lake bank slopes, and relates to the technical field of ecological restoration. A plurality of grooves are formed in the ring walls of a plurality of positioning rings at equal angles; two ends of a plurality of connecting network cables are respectively arranged in the grooves by using connecting assemblies; a plurality of positioning nails are movably inserted into the positioning ring respectively, the positioning nails are matched with and abut against the inner wall of the positioning ring, and open grooves are formed in the top ends of the positioning nails; one end of each of a plurality of rotating pressing rods is screwed in the corresponding open groove through threads, and the other end of each rotating pressing rod is screwed with a fixing ring through a bearing; the plurality of turfs are respectively arranged on the bank slope, and the connecting net lines are positioned behind the turfs; a plurality of fixed insertion rods are fixedly arranged on the ring wall of the fixed ring at equal angles, and the fixed insertion rods are movably inserted into the turf; by means of the net structure formed by the positioning rings and the connecting net lines and the fixing effect of the positioning nails, the turf can be conveniently fixed to the bank slope, the anti-scouring capacity of the bank slope is improved, and ecological restoration of the bank slope is facilitated.

The invention belongs to the field of gravel curtain layer reconstruction, and provides a gravel curtain layer reconstruction method which comprises the steps of stripping, screening, storage, improvement, reconstruction, watering and maintenance, and further provides a soil-stone separation device used in the gravel curtain layer reconstruction method, the soil-stone separation device comprises a separation tank, the top of the separation tank is open, a gravel flow guide bin covers the separation tank, and a sieve plate is rotationally arranged in the separation tank; the sieve plate is arranged in the separation tank and vibrates during rotation, the interior of the separation pipe is divided into a screening bin and a soil receiving bin in an up-down corresponding mode through the sieve plate, and the sieve plate can move upwards through a jacking mechanism so that the sieve plate can be moved out of the separation tank and separated objects can be thrown out all around through centrifugal force. The damaged gravel curtain layer is reconstructed, a crust layer is formed below the gravel layer, the wind erosion resistance can be greatly enhanced, it is guaranteed that strong wind erosion can be effectively resisted for a long time, and meanwhile gravel and original gravel curtain layer soil can be rapidly separated and stacked in a high-quality mode in the gravel curtain layer reconstruction period.

The utility model relates to natural gas pipeline technical field, concretely relates to a kind of anti-erosion pipeline elbow, including spherical cavity and erosion-resistant layer, spherical cavity is equipped with fluid inlet pipe and fluid outlet pipe in the radial communication, the included angle of the axis of fluid inlet pipe and fluid outlet pipe is less than 180 °, fluid inlet pipe and fluid outlet pipe are symmetrically arranged in the middle section of spherical cavity, erosion-resistant layer is lined in spherical cavity inner wall, erosion-resistant layer is equipped with first hole and second hole, first hole is communicated with fluid inlet pipe, second hole is communicated with fluid outlet pipe. By being provided with spherical cavity between fluid inlet pipe and fluid outlet pipe with certain included angle state, fluid can flow along the arc inner wall of spherical cavity in turning position, reduce direct scouring to inner wall in turning position, to reduce the degree of erosion, extend the service life of elbow, simultaneously, by being provided with erosion-resistant layer in elbow, the erosion resistance of elbow can be improved, to further extend the service life of elbow.

The utility model relates to the technical field of testing of equipment erosion caused by annulus particles, and discloses an underground annulus particle erosion experiment device which comprises an annulus simulation bin, an experiment cavity is formed in the annulus simulation bin, experiment equipment is arranged in the experiment cavity, and a particle erosion arc groove is formed in the inner wall of the experiment cavity; the testing mechanisms are located at the upper end and the lower end of the annulus simulation bin, each testing mechanism comprises a bearing assembly, a pressing assembly and a rotating assembly, the bearing assemblies are located at the bottom of the annulus simulation bin, the pressing assemblies are located at the top of the annulus simulation bin, and the rotating assemblies are located in the pressing assemblies; through the arrangement of the testing mechanism, an underground annular particle erosion experiment can be simulated, the erosion effect of particles on equipment under different working conditions can be simulated through the erosion experiment, the erosion resistance and the service life of the equipment can be evaluated, a scientific basis is provided for design, material selection and maintenance of the equipment, and it is ensured that the equipment can safely and reliably operate underground.

The application discloses a kind of permeable crystalline concrete protective fluid systems with anticarbonization, anticorrosion function and preparation method and application thereof.The protective fluid system includes permeable crystalline inorganic nano concrete protective fluid, reinforcing colorant and organic-inorganic composite resin varnish.The protective fluid system is used to protect concrete structure, including the following steps: first, using permeable crystalline inorganic nano concrete protective fluid to coat the surface of concrete structure, curing to solidification, then using reinforcing colorant to coat, curing to solidification, finally using organic-inorganic composite resin varnish to coat, curing to solidification.The protective fluid system is used for concrete structure protection, not only has excellent waterproof, anticarbonization, weathering resistance, acid and alkali erosion resistance and other advantages, coloring layer and sealing layer can adapt to different decoration needs, while improving surface hardness and weather resistance, three-layer composite structure provides structure, vision, threefold protection of beauty, better than existing single function material.

The invention relates to the technical field of metallurgical coking, and provides a devitrification and CO erosion resistant zero-expansion silica brick and a preparation method thereof.The devitrification and CO erosion resistant zero-expansion silica brick is prepared from, by weight, 3-10 parts of nanoscale alpha-Al2O3, 15-35 parts of andalusite, 30-40 parts of high-purity fused mullite, 10-20 parts of superfine silica powder, 2-5 parts of silica sol binding agent and 3-5 parts of composite mineralizer. Through the synergistic effect of the design of the composite mineralizer and the stepped heat treatment process, the technical problems that the existing zero-expansion silica brick is easy to devitrify and crystallize fused quartz, poor in CO erosion resistance and lack of crystallization degree during long-term use at high temperature are solved; the thermal shock cycle index and the high-temperature breaking strength of the material can be improved, the formation of alpha-cristobalite crystallization peak is effectively inhibited, and the mass loss is reduced in a reducing atmosphere, so that the structural stability of the material is enhanced, and the service life of the material is prolonged.

The utility model discloses a high temperature and high pressure resistant oil-submerged pump cable, which comprises a sheath internally provided with signal cables, the sheath comprises an outer protective layer and a lightweight armor layer which are arranged from outside to inside, the outer protective layer is made of silicon rubber, a filling layer is arranged between the sheath and the signal cables, a steel wire rope is arranged between the adjacent signal cables, and the light armor layer is made of silicon rubber. A waterproof layer is arranged between the filling layer and the sheath. According to the utility model, by arranging the outer protective layer and the light-weight armor layer, the sheath can be effectively prevented from being embrittled and damaged in a low-temperature environment, and by utilizing the light-weight armor layer, not only can the mechanical strength of the cable and the high-temperature resistance, high-pressure resistance and corrosion resistance of the cable be improved, but also the weight of the sheath can be effectively reduced, and the transportation and construction difficulty can be reduced; and the inner protective layer is arranged, so that the cable not only has chemical stability, corrosion resistance and insulativity, but also has relatively high toughness, wear resistance and chemical erosion resistance, and the bending resistance of the cable is enhanced.

The invention discloses blast furnace stemming and a preparation method thereof. The invention discloses a high-temperature-resistant wear-resistant coating which is characterized by comprising the following components in parts by weight: 380-420 parts of brown aluminum oxide, 70-90 parts of a carburant, 50-70 parts of Guangxi white mud, 110-150 parts of silicon carbide, 15-30 parts of asphalt powder, 5-30 parts of vanadium carbide or chromium carbide or a mixture of vanadium carbide and chromium carbide or pore-forming vanadium chromium carbide and 50-100 parts of liquid resin. The blast furnace stemming disclosed by the invention has relatively high high-temperature breaking strength, normal-temperature compression strength and normal-temperature breaking strength, and excellent slag and molten iron erosion resistance and molten iron scouring resistance.

The invention relates to the technical field of refractory materials, and discloses an RH dip pipe castable and a production method thereof.The RH dip pipe castable is formed by mixing fused white corundum particles, sintered corundum, 90 alumina, a metamorphic-layer-free reclaimed material and the like as raw materials, by accurately controlling the adding amount of the raw materials, the advantages of the raw materials are fully exerted, and the production cost is lowered. The produced RH dip pipe castable has the characteristic of balanced performance, namely, proper demolding strength, is convenient to transport in the production process, a certain number of nanoscale micropores exist in aggregate and a matrix in the use process, generated cracks are small and few, a proper amount of slag can be adhered, the cracks can be bridged, and the RH dip pipe castable has the characteristics of high high-temperature breaking strength, good thermal shock performance, high strength, high strength, high strength and the like. And the effect of prolonging the service life of the RH dip pipe is remarkable.

This invention discloses a concrete mix design and manufacturing method for underground engineering concrete in a coupled environment of underground environment and load, relating to the field of underground engineering concrete technology. It aims to address the problem that traditional concrete mix design does not fully consider the coupling effect of underground environment and load. The underground environment includes groundwater erosion, wet-dry cycle, and temperature fluctuation; the load includes stress ratio. α s Dynamic load frequency and dynamic load amplitude α d This leads to technical problems such as insufficient erosion resistance, crack resistance, and mechanical stability of concrete, resulting in a short service life. This mix design is based on quantitative analysis of coupled environmental parameters. With cement, composite admixtures, recycled aggregates, modifiers, water, and additives as core components, the basic mix proportion is determined through a mapping model between "environment-load" coupled parameters and component content. The target mix proportion is then obtained through orthogonal experimental optimization. The manufacturing method includes four core steps: raw material pretreatment, graded mixing, gradient curing, and coupled environmental simulation curing.

This invention provides an electrode plate for electro-deintercalation and extraction of lithium, its preparation method, and its application. The electrode plate comprises a porous current collector and slurry coatings on both sides of the porous current collector. The slurry coatings on both sides of the porous current collector are connected through the pores of the current collector, and the slurry coatings include a structural agent. The electrode plate of this invention, by embedding the slurry coating containing the structural agent into the current collector, forms an extremely robust three-dimensional conductive mesh structure electrode plate with line contact, which improves both the electrode plate's erosion resistance and its conductivity and lithium extraction capability.

The invention provides a copper liquid continuous oxygen determination probe. A gradient composite protection tube essentially considers the erosion resistance of a surface layer and the thermal shock resistance of the whole from the material; due to the unique design of the turbulent flow cover and the thermal buffer cavity, destructive power of mechanical scouring and thermal shock is effectively eliminated from the physical structure; according to the modularized solid-state reference and the modularized sensing unit, the leakage and failure risks of a traditional air reference are fundamentally avoided, and the stability of a core measuring element is improved; the integrated intelligent diagnosis system not only can output high-reliability measurement data, but also can monitor the health state of the probe in real time and predict the residual life, so that the conversion from passive failure replacement to active early warning maintenance is realized. According to the scheme, the structural design is reasonable, the process complexity and the manufacturing cost are not excessively increased while the service life of the probe is remarkably prolonged, the measurement stability is remarkably improved, and good industrial application prospects and economic benefits are achieved.