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69 results about "Alkali activated" patented technology

Alkali-activated cementing material as well as preparation method and application thereof

PendingCN121318253AAlkali activatedTailings
The invention provides an alkali-activated gel material as well as a preparation method and application thereof. The alkali-activated gel material is prepared from a composite alkali activator and a solid waste gel material, the composite alkali activator is formed by mixing water glass and NaOH, and the mass ratio of the water glass to the NaOH is 2000: (350-520); the solid waste gel material is formed by mixing iron tailing sand, limestone and fly ash, and the ratio of the total mass of the limestone and the fly ash to the mass of the iron tailing sand is (70-80): (30-40); the mass ratio of the composite alkali activator to the solid waste gel material is (0.32-0.38): 1. The alkali-activated cementing material is prepared by cooperatively treating the iron tailing sand through the limestone and the fly ash, and the alkali-activated cementing material with good mechanical properties can be prepared by regulating and controlling the mass ratio of the raw materials.
Owner:ANHUI UNIVERSITY OF ARCHITECTURE

Preparation method and application of alkali-activated iron tailing geopolymer adsorbent

The invention relates to a preparation method and application of an alkali-activated iron tailing geopolymer adsorbent. According to the method, an iron tailing geopolymer is prepared through an alkali activation method, that is, an aluminosilicate structure in iron tailings is destroyed in an alkali activation mode, so that silica tetrahedron and alumina tetrahedron structures of the iron tailings are reconstructed, and a geopolymer material with adsorption capacity is prepared; on the basis, a foaming agent hydrogen peroxide solution is introduced to adjust the performance, and parameters such as modulus, water cement ratio and curing temperature of the alkali activator are respectively adjusted to prepare an optimal sample. The iron tailing geopolymer adsorbent material which is high in adsorption rate and good in stability is obtained, and the effect of adsorbing residual ciprofloxacin in wastewater is remarkable.
Owner:HEBEI UNIV OF TECH

Method for preparing 45 mullicarb from solid waste coal gangue

The invention relates to the technical field of coal gangue treatment, in particular to a method for preparing 45 mullite by using solid waste coal gangue, which comprises the following steps: crushing and screening the solid waste coal gangue, then carrying out microwave irradiation, after irradiation, feeding into a planetary ball mill for grinding and drying, adding a composite alkali solution, stirring and activating to obtain 45 mullite; the composite alkali solution is an aqueous solution formed by mixing NaOH and Na2CO3; adding an interface modifier and composite nanoparticles into the activated coal gangue powder to obtain modified powder; adding water, mixing, pugging, aging, carrying out static pressure molding, and maintaining the pressure to obtain a green body; and uniformly spraying an aqueous solution prepared from a mineralizing agent on the surface of the green body, pre-drying after spraying, carrying out segmented calcination, and cooling to room temperature to obtain the 45 mullicarb. The coal gangue is cooperatively treated through microwave irradiation, compound alkali activation, interface modification and a compound mineralizer, so that the problems of inertia of silicon-aluminum components and poor interface compatibility of the coal gangue are solved, and solid waste resource utilization is realized.
Owner:INNER MONGOLIA YUHUA NEW TECH MATERIALS CO LTD

TPU sheet-shaped foaming material composition for shoes and foaming process of TPU sheet-shaped foaming material composition

The invention provides a TPU sheet foam material composition for shoes and a foaming process thereof. The composition comprises a polyurethane prepolymer, a filler, a catalyst, a functional additive and TPU, wherein the polyurethane prepolymer is a prepolymer which is prepared by reacting carbodiimide modified MDI (Diphenylmethane Diisocyanate) with polyhydric alcohol; the filler is modified mica powder which is obtained by sequentially performing acid-base activation, ball milling, silane coupling and CTAB intercalation on mica powder and then grafting polycaprolactone on the surface of the mica powder. According to the foaming material composition and the foaming process provided by the invention, the TPU flaky material with uniform thickness and density in all directions can be prepared, the problem that the cost is increased due to the fact that upstream customers need to customize different molds is solved, meanwhile, the prepared flaky material is also convenient to transport, and the transportation cost is reduced; the size stability of the material is good, so that a downstream client can conveniently cut according to own requirements; and the rebound resilience of the material can meet the performance requirements of common soles and insoles.
Owner:诚达责任有限公司

A low-carbon high-iron sulfoaluminate cementitious material based on steel slag solid waste

PendingCN122403801AAluminateGrog
This invention belongs to the field of inorganic non-metallic materials technology, and specifically relates to a low-carbon, high-iron sulfoaluminate cementitious material based on steel slag solid waste. It comprises the following raw materials in parts by weight: limestone 35-55 parts, anhydrite 10-20 parts, bauxite 20-45 parts, modified steel slag A 8-15 parts, and modified steel slag B 5-10 parts. Modified steel slag A is activated by acid / alkali, doped with calcium fluoride / sodium sulfate / titanium dioxide and calcined, and then in-situ co-precipitated to introduce magnesium aluminum spinel nanocrystals. This is used for raw material calcination, which can reduce the calcination temperature, refine the clinker grains, and improve early strength. Modified steel slag B is activated by acid / alkali, doped and calcined, and coated with silane coupling agent / polyvinyl alcohol / silica ball milling. It is incorporated as a blending material to improve the interface, slow-release hydration, and improve later-stage strength. This invention achieves high-value utilization of steel slag through synergistic modification, and the cementitious material has advantages such as low carbon content, early and high strength, suitable setting time, and excellent stability.
Owner:ZHENGZHOU JIANWEN SPECIAL MATERIAL TECH

Method for preparing antibacterial functional core-shell silicon dioxide from fluorine-containing silicon slag

PendingCN122004207Aincrease profitMake sure it is fully securedZinc halidesBiocideSilicon oxideSlurry
The invention relates to the technical field of chemical engineering, in particular to a method for preparing antibacterial functional core-shell silicon dioxide from fluorine-containing silicon slag, which comprises the following steps: S1, silicon slag pretreatment: mixing silicon slag with water to prepare slurry, sanding the slurry, and controlling the particle size D50 of SiO2 in the sanded silicon slag to be less than 200nm; s2, alkali activation and silicon release: mixing the sanded slurry with an alkali solution, carrying out a hydrothermal reaction, and controlling the silicon dissolution rate to be within a preset range; s3, constructing a gradient pH core shell: firstly, adjusting the pH of the system to an alkaline interval, and carrying out reaction to form a compact inner shell; adjusting the pH value of the system to an acidic interval, and adding a solution containing zinc and fluorine for reaction to form a composite shell; s4, post-treatment: washing and calcining a product obtained in the step S3 to obtain the core-shell silicon dioxide with the antibacterial function. The silicon slag is purified by a one-step method through a four-step integrated process of pretreatment, activation, gradient coating and post-treatment, and the fluorine-containing waste slag is directionally converted into a high-added-value functional material.
Owner:YUNNAN KAIWEITE NEW MATERIALS CO LTD +1

Early-strength grinding aid as well as preparation method and application thereof

The invention discloses an early-strength grinding aid as well as a preparation method and application thereof, and belongs to the technical field of building materials. Every 100 parts of the early strength grinding aid comprises the following components in parts by weight: 12-18 parts of dual modified nano calcium silicate, 8-12 parts of a citric acid modified alcohol amine compound, 18-22 parts of alkali activated superfine slag powder, 3-6 parts of a dispersing agent, 2-4 parts of a stabilizer and the balance of water, the double modified nano calcium silicate is prepared by reacting sodium silicate with calcium nitrate and performing double modification through polyvinylpyrrolidone and a silane coupling agent; the citric acid modified alcohol amine compound is a citric acid modified alcohol amine compound, and the alcohol amine compound comprises triethanolamine and diethyl isopropanolamine; the alkali activated superfine slag powder is slag powder activated by NaOH. The early-strength grinding aid is low in cost, can effectively improve the 3d strength of mineral powder cement after being doped in the mineral powder cement, and enables the mineral powder cement to be free of shrinkage.
Owner:NANJING YONGNENG MATERIALS

A method for preparing porous adsorbent material, porous adsorbent material, a flow-through column, use of porous adsorbent material, and a system for treating contaminated water

Disclosed is a method for preparing porous adsorbent material (22), the method comprising providing a mixture of metakaolin (10) and calcium titanate (12, CaTiO3), mixing the mixture with alkali solution (14) and reacting to obtain alkali-activated modified material (16), providing oil comprising oleic acid (18) as a foaming agent to the alkali-activated modified material (16), and providing hydrogen peroxide (20) as a foaming agent to the alkali-activated modified material (16), and allowing the alkali-activated modified material to foam in the presence of the hydrogen peroxide to obtain porous adsorbent material (22) comprising alkali-activated titanate-modified metakaolin. Also disclosed is porous adsorbent material comprising alkali-activated titanate-modified metakaolin, a flow- through column (24) comprising the porous adsorbent material and system for treating contaminated water.
Owner:UNIV OF OULU

Porous carbon, method for producing positive electrode active substance, and lithium ion secondary battery

One aspect of the present invention provides porous carbon capable of increasing the amount of supported sulfur. In a state whereby a lid is placed on a container that houses a mixture obtained by mixing a spherical resin, a base and water, modification is carried out by performing a first heat treatment in an inert atmosphere at a temperature of 700°C or higher. Chemical activation, and especially alkali activation, is used as an activation method, and carbonization and alkali activation are carried out by means of the first heat treatment to bring about modification, and specifically particle shrinkage, formation of pores due to gas release inside the particles, cracks on the surface of particles, and the like. The modified carbon (also known as porous carbon) is used as a support body for sulfur that is subsequently blended.
Owner:SEMICON ENERGY LAB CO LTD

A method for preparing 45 molecate from solid waste coal gangue

This application relates to the field of coal gangue treatment technology, specifically to a method for preparing 45 molecate from solid waste coal gangue, comprising the following steps: crushing and screening the solid waste coal gangue, followed by microwave irradiation; then grinding and drying in a planetary ball mill; adding a composite alkali solution (an aqueous solution of NaOH and Na2CO3) for stirring and activation; adding an interface modifier and composite nanoparticles to the activated coal gangue powder to obtain modified powder; mixing with water, kneading, aging, followed by static pressing and pressure holding to obtain a green body; uniformly spraying an aqueous solution of a mineralizer onto the surface of the green body; pre-drying after spraying; then performing segmented calcination; and finally cooling to room temperature to obtain 45 molecate. By synergistically treating coal gangue through microwave irradiation, composite alkali activation, interface modification, and composite mineralizer, the problems of inertness and poor interfacial compatibility of the silicon-aluminum components in coal gangue are solved, while also achieving the resource utilization of solid waste.
Owner:INNER MONGOLIA YUHUA NEW TECH MATERIALS CO LTD

Basalt fiber modification method, modified basalt fiber and application

The invention relates to a basalt fiber modification method, a modified basalt fiber and application. The basalt fiber modification method comprises the following steps: (1) soaking basalt fibers in alkali liquor to obtain alkali-activated basalt fibers; (2) sequentially soaking the basalt fibers subjected to alkali activation in a first solution containing a first modifier and a second solution containing a second modifier to obtain modified basalt fibers; wherein the first modifier comprises one or more of carboxymethyl cellulose salt and alkylbenzene sulfonate; the second modifier comprises polyvinyl alcohol. The modified basalt fiber obtained through the method has better interface performance with the cement-based material, and the basalt fiber reinforced cement-based material can obtain better ductility.
Owner:TSINGHUA UNIVERSITY

Porous carbon material as well as preparation method and application thereof

The invention relates to a porous carbon material and a preparation method and application thereof.The preparation method of the porous carbon material comprises the following steps that a carbon source and water are mixed, the pH is controlled to be 3-5 through a pH regulator, then a hydrothermal reaction is conducted, a carbon precursor is obtained, the oil-water partition coefficient of the carbon source is 2 or below, the temperature of the hydrothermal reaction is 400-700 DEG C, and the pressure of the hydrothermal reaction is 6-12 MPa; performing oxidation treatment on the carbon precursor to obtain an oxidation product; and mixing the oxidation product with an alkali activator, and calcining to obtain the porous carbon material. The porous carbon material with orderly arranged pore channels can be prepared by using the preparation method disclosed by the invention, so that when the silicon-carbon material is prepared by using the porous carbon material disclosed by the invention, directional slow-release expansion and stress release can be realized in an electrochemical process, the structural stability of the silicon-carbon material is improved, and the service life of the silicon-carbon material is prolonged. The silicon-carbon material is prevented from being broken due to volume expansion of silicon in the circulation process, so that the electrochemical performance and the cycle life of the battery can be effectively improved.
Owner:YONGJIANG LAB

Solid waste composite admixture for concrete and preparation method thereof

The invention discloses a solid waste composite admixture for concrete and a preparation method thereof, and the solid waste composite admixture for concrete is prepared from the following materials: 30-50 parts of steel slag powder, 20-40 parts of superfine slag powder, 10-25 parts of phosphorus slag powder, 5-15 parts of nickel slag powder, 0.5-3 parts of a high-molecular low-carbon stabilizer, and 5-10 parts of modified phosphogypsum, the ardealite is calcined at 600 DEG C to remove impurities and then is mixed and ground with sodium citrate according to the ratio of 9: 1, and the specific surface area is greater than or equal to 350m < 2 > / kg; the steel slag powder is prepared by grinding steelmaking solid waste until the specific surface area is greater than or equal to 400m < 2 > / kg; the superfine slag powder is prepared by grinding blast furnace slag until the specific surface area is greater than or equal to 420m < 2 > / kg; the fineness of the phosphorus slag powder and the nickel slag powder meets the requirement that the 45-micron screen residue is smaller than or equal to 15%; the high-molecular low-carbon stabilizer is formed by compounding a silane coupling agent and a polycarboxylic acid copolymer; the porosity of the composite admixture is controlled to be 12%-16%, the average pore size is smaller than or equal to 420 nm, and the composite admixture is used for replacing 20%-50% of cement in concrete. According to the method, slag alkali activation is used for replacing high-energy-consumption steam curing, and the energy consumption peak value is reduced by 40% through a dynamic thermotechnical regulation and control system.
Owner:JIANGSU WANSTER NEW MATERIAL TECH CO LTD

Solid waste composite admixture for concrete and preparation method thereof

This invention discloses a solid waste composite admixture for concrete and its preparation method. The solid waste composite admixture for concrete is prepared from the following materials: 30-50 parts steel slag powder, 20-40 parts blast furnace slag powder, 10-25 parts phosphorus slag powder, 5-15 parts nickel slag powder, 0.5-3 parts high-molecular low-carbon stabilizer, and also includes 5-10 parts modified phosphogypsum. The phosphogypsum is calcined at 600℃ to remove impurities and then mixed with sodium citrate at a ratio of 9:1, resulting in a specific surface area ≥350 m². 2 / kg; the steel slag powder is steelmaking solid waste that has been ground to a specific surface area ≥400m². 2 / kg; the slag powder is blast furnace slag ground to a specific surface area ≥420m². 2 / kg; the fineness of the phosphorus slag powder and nickel slag powder meets the requirement of ≤15% residue on a 45μm sieve; the high-molecular low-carbon stabilizer is composed of silane coupling agent and polycarboxylic acid copolymer; the porosity of the composite admixture is controlled at 12%-16%, with an average pore size ≤420nm, and is used to replace 20%-50% of cement in concrete; this invention uses slag alkali activation to replace high-energy-consuming steam curing, and reduces peak energy consumption by 40% through a dynamic thermal control system.
Owner:JIANGSU WANSTER NEW MATERIAL TECH CO LTD

Alkali-activated cement materials using sodium and calcium reagents for alkali activation

PCT designated stageWO2026178179A1Sodium bicarbonateCalcium hydroxide
Alkali-activated cement binders that include one or more mineral precursor components and particular combinations of sodium and calcium containing reagents and methods for producing the same. The reagent combinations are specified so as to deliver enhanced alkali activation of mineral precursors. These reagents provide for effective alkali activation, improved mechanical characteristics of resulting cementitious products, simpler mix designs, lower material handling risks, improved environmental performance, and improved cost effectiveness. Relevant sodium and calcium containing reagents include, but are not limited to sodium carbonate, sodium bicarbonate, calcium oxide and calcium hydroxide.
Owner:RHODES JAMES +2

Process for obtaining concentrated silica zeolite activator, concentrated silica zeolite activator and use thereof

The present invention relates to a process for obtaining a silica zeolite activator from the combination of a source of silica (SiO2), a source of alumina (Al2O3) and a source of sodium (Na2O). This process involves a unique electrified alkaline fusion heat treatment and involves low temperatures and energy consumption, contributing to a reduction in the CO2 footprint. In addition, the present invention relates to the concentrated solid silica zeolite activator thus obtained, which has reactive silica and zeolite phases. The present invention also relates to the use of silica zeolite for alkaline activation of alkali-activated cement.
Owner:CIRCLUA SA

A lanthanum-chitosan composite film modified carbon-based electrode, a preparation method thereof and an electric field assisted deep phosphorus removal method

The present application relates to water treatment and electrochemical separation technical field, disclose a kind of lanthanum-chitosan composite membrane modified carbon-based electrode and its preparation method and electric field auxiliary deep phosphorus removal method, the carbon-based electrode includes carbon-based substrate and the lanthanum-chitosan composite membrane layer covered on its surface, lanthanum species in composite membrane layer and chitosan matrix synergistically provide selective binding site to phosphate.The preparation method includes: substrate cleaning and alkali activation, lanthanum salt and chitosan solution are mixed and ultrasonic dispersion, fractionally drop coating load, vacuum drying film and hot pressing / light pressure densification.The electrode is used as anode, unmodified carbon cloth as cathode to construct flow-by CDI device, and under the condition of circulating flow, external voltage can be applied, minutes level rapid deep phosphorus removal can be realized under high chlorine background, and it has reversible regeneration performance, and removal rate is close to 100%.
Owner:HANGZHOU NORMAL UNIVERSITY

Materials and methods for developing brine sludge activated natural pozzolan based alkali activated binder

PendingUS20260145999A1SludgePhysical chemistry
A method of producing concrete, including mixing natural pozzolan and an activator including sodium silicate and brine sludge to form an alkali activated binder; and mixing a coarse aggregate and a fine aggregate with the activated alkali binder to form the concrete, where a density of the brine sludge is about 100 kg / m3, a ratio of the sodium silicate to the brine sludge is about 2.5 to 1 by mass, and an oxide composition of the brine sludge comprises 15-20 wt % CaO, 2-6 wt % MgO, 0.5-2 wt % SrO, 0.5-2 wt % Fe2O3, 0.5-1.5 wt % SiO2, 0-0.5 wt % SO3, 12-18 wt % Na2O, 7-10 wt % BaO, 2-5 wt % Al2O3, 0.25-1 wt % K2O, and 5-10 wt % Cl, and a loss on ignition of 35-45 wt %. An alkali activated binder, including: natural pozzolan; and an alkali activator including sodium silicate and brine sludge. A concrete, including: the alkali activated binder; coarse aggregate; and fine aggregate.
Owner:KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS +1

Low-temperature auxiliary preparation method of ceramic-based polyamide nanofiltration membrane

The invention discloses a low-temperature auxiliary preparation method of a ceramic-based polyamide nanofiltration membrane, which comprises the following steps: (1) carrying out ultrasonic cleaning and strong alkali activation on a ceramic membrane, and loading a silane coupling agent to obtain a silane grafted ceramic membrane; (2) reacting the silane grafted ceramic membrane obtained in the step (1) with an aqueous solution containing piperazine and a polyamine catalyst at room temperature, and then removing the unreacted aqueous solution; (3) reacting the material obtained in the step (2) with an n-hexane solution of trimesoyl chloride and triethyl phosphate at room temperature, then removing the unreacted n-hexane solution, and pre-cooling the n-hexane solution at 20 DEG C for 12 hours for use; and (4) carrying out air drying and heat treatment on the material obtained in the step (3). According to the method, the oil phase is pre-cooled at low temperature, and the specific oil phase active buffer agent is introduced, so that the reaction activity of the acyl chloride monomer is effectively reduced, the interfacial polymerization process is changed from instantaneous explosion to controllable progressive, and the thickness uniformity and compactness of a separation layer are remarkably improved.
Owner:SUNTAR MEMBRANE TECHNOLOGY (XIAMEN) CO LTD

Radiation-proof ultra-high performance recycled concrete and preparation method thereof

The present application relates to a kind of anti-radiation super high performance recycled concrete and its preparation method, belong to building material and solid waste resource utilization technical field.The concrete is the synergistic reaction of the multi-source silicon-aluminum precursor of the main ground blast furnace slag and alkali activation liquid, does not contain Portland cement, combined with the nickel iron slag recycled sand of particle size refinement, the shielding reinforcing filler (lead glass and barite) of compound and high-performance copper-plated steel fiber, form dense structure and excellent mechanics, durability and radiation protection performance.The method realizes the high-value reuse of industrial solid waste, has excellent green environmental protection, engineering adaptability and long-term stability, is suitable for nuclear facilities, radioactive sites and other high protection demand scenarios.
Owner:ZHEJIANG HUADONG ENG CONSTR MANAGEMENT CO LTD +1

Prefabricated assembly of an outer frame and an inner core of foamed cementitious substrate

PendingCN122649536AFoam concreteBrick
The application discloses a combined wall of prefabricated assembly outer frame and inner cementitious base material foam concrete core body, comprising a steel skeleton and a core body, the core body being cementitious base material recycled brick powder based foam concrete, components of the core body comprising, in weight parts, 60-80 parts of slag, 40-55 parts of recycled brick powder, 10-12 parts of alkali activator, 0.8-1.2 parts of foaming agent, 1-3 parts of nano montmorillonite, 3-4 parts of phase change microcapsules and 0.5-1 part of basalt fiber bundle. The application is designed in a trinity of solid waste regeneration, material modification and structure innovation, and solves the problems of building waste resource utilization, brittleness of alkali activated materials and performance imbalance of assembled wall body, and has the advantages of low carbon, rapid installation, intelligent heat management and the like, and meets the requirements of building industrialization and double carbon emission reduction.
Owner:NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER

Sewage and sludge co-treatment device coupling denitrifying phosphorus removal with ultrasonic treatment and alkali treatment

The utility model discloses a sewage and sludge co-treatment device coupling denitrifying phosphorus removal with ultrasonic treatment and alkali treatment, belongs to the technical field of sewage and sludge treatment, and solves the problems of high carbon source consumption and high ultrasonic energy consumption of the existing biochemical treatment device. According to the utility model, the alkali activation tank, the ultrasonic A2O treatment system and the denitrification phosphorus removal tank are combined. The sludge activity is increased through the alkali activation tank, and the sludge flows back to the aerobic tank, so that the overall microbial activity of the aerobic tank can be improved, and the alkalinity of the aerobic tank is supplemented; under the action of alkali, the ultrasonic output power in the ultrasonic treatment tank is greatly reduced, and the expansion and rupture of sludge cells are realized under the assistance of low energy density. Meanwhile, the sludge is subjected to low-density ultrasonic activation in the ultrasonic treatment tank and then flows back to enter the denitrifying phosphorus removal tank, and the released carbon source and phosphorus source enable the denitrifying phosphorus removal of the biochemical system to be more sufficient, so that the denitrifying phosphorus removal effect of the whole device is improved, the carbon source is supplemented for the denitrifying phosphorus removal process, and the consumption of the carbon source is reduced.
Owner:BEIJING MUNICIPAL RES INST OF ENVIRONMENT PROTECTION

Backwashing method of activated carbon oil removal column

The invention relates to the technical field of hydrometallurgy, particularly discloses an activated carbon oil removal column backwashing method, and solves the problem of oil removal efficiency reduction caused by activated carbon adsorption saturation in electrodeposition nickel production. The process comprises the following three steps: 1) washing nickel with clear water: introducing clear water into an emptied column body, blowing in compressed air with the pressure of 0.4-0.6 MPa, stirring for 3-5 minutes, soaking for 25-35 minutes, and repeating for 1-5 times to thoroughly elute nickel ions; 2) weak base activation: introducing weak base water with the pH value of 8.0-9.0, blowing air, mixing, introducing saturated steam with the temperature of 160 DEG C, and raising the temperature to 80-85 DEG C; and 3) steam desorption: after steam is stopped, carrying out secondary air-blowing stirring for 3-5 min, soaking for 25-35 min, and emptying waste liquid. A gas-heat-alkali synergistic regeneration mechanism is innovatively adopted, and in-situ efficient regeneration of the activated carbon is achieved. The method has the effects that the oil removal efficiency of the regenerated activated carbon is recovered by 95% or above, the oil content of the oil-removed liquid is less than or equal to 3.0 ppm, the service life of the activated carbon is prolonged by 300%, and the rate of a nickel electrodeposition premium grade product is increased to 99.2%. The technology is easy to operate, low in cost, free of pollution and suitable for an oil removal system for nickel / cobalt / copper hydrometallurgy electrodeposition.
Owner:JINCHUAN GROUP NICKEL COBALT CO LTD

Micro-expansion material and method for sealing roof-contacted cavity of filled goaf

The invention discloses a micro-expansion material and method for sealing a roof-contacted cavity of a filled goaf, and the micro-expansion material is prepared by mixing the following components and an alkali activator, and the components comprise 12-16 parts by mass of slag, 8-12 parts by mass of carbide slag, 20-25 parts by mass of water and 50-55 parts by mass of high-silicon nickel smelting slag, naOH is adopted as the alkali activating agent, and the adding amount of the alkali activating agent is 4%-8% of the total amount of the slag, the carbide slag and the high-silicon-nickel smelting slag. In a static pressure self-flow grouting mode, micro-expansion material slurry which is stirred and mixed in a ground stirring site flows into a main pipeline (7) through an earth surface input pipeline, the area of a non-headspace cavity (6) is filled with the micro-expansion material slurry through the laid main pipeline (7) and a spiral pipeline (8), and when the flow monitored by a flow monitor is continuously zero or lower than a set threshold value, grouting filling is stopped; therefore, long-acting sealing with the high roof contact rate is achieved, and the roof contact rate of the roof contact cavity after the micro-expansion material is filled reaches up to 99% or above.
Owner:SINOSTEEL MAANSHAN INST OF MINING RES CO LTD +1

Anti-crack concrete with high stone powder content and preparation method of anti-crack concrete

PendingCN121135296AFiberTriethoxysilane
The invention discloses anti-crack concrete with high stone powder content. The anti-crack concrete is prepared from the following raw materials in parts by weight: 180 to 230 parts of cement, 40 to 80 parts of fly ash, 30 to 70 parts of mineral powder, 60 to 120 parts of stone powder, 1000 to 1200 parts of coarse aggregate, 800 to 1000 parts of fine aggregate, 170 to 190 parts of water, 5 to 15 parts of water reducing agent, 2 to 8 parts of modified wheat straw fiber, 0.5 to 2 parts of water retention component and 0.1 to 0.5 part of air entraining-foam stabilizing component, the wheat straw fiber is sequentially subjected to alkali activation and triethoxysilane and acrylic polymer emulsion modification, and the water retention component and the air entraining-foam stabilizing component are combined, so that high-dosage application of the stone powder in concrete can be realized, and good working performance, mechanical strength, durability and the like are considered; and the related preparation method is relatively simple, relatively low in cost and suitable for popularization and application.
Owner:HUAXIN CEMENT CO LTD

Geopolymer-based sub-ambient daytime radiative cooling coating

Sub-ambient daytime radiative cooling (SDRC) coating comprising: an alkali activated metakaolin, BaSO4, and silica nanospheres, wherein the alkali activated metakaolin is prepared by reaction of metakaolin with an alkali activator comprising waterglass and a strong base selected from the group consisting of LiOH, NaOH, KOH, Ca(OH)2, Li2O Na2O, K2O, CaO, and a mixture thereof, a coating formulation comprising the same, and a method of preparation and use thereof.
Owner:THE HONG KONG POLYTECHNIC UNIV

Alkali-activated porous carbon preparation device and application

The invention discloses an alkali-activated porous carbon preparation device and application, and relates to the technical field of alkali-activated porous carbons.The alkali-activated porous carbon preparation device comprises a shell, an anti-adhesion mechanism and a powder screening mechanism, the anti-adhesion mechanism is arranged on the inner side of the shell, and the powder screening mechanism is arranged on the outer side of the anti-adhesion mechanism; the anti-adhesion mechanism comprises a conveying cylinder, a packing auger, a first feeding port and a second feeding port, the packing auger is rotationally connected to the inner side of the conveying cylinder, finally, materials are subjected to multiple times of rotary conveying and free falling, reacted materials are separated by means of gravity, the materials are combined again in the subsequent rotary conveying process, and the materials are separated from the first feeding port and the second feeding port. Through multiple cycles, multiple and multi-surface contact combination of the raw material and the reaction material is realized, the contact surface participating in the reaction is improved, the wrapping property of the reaction material on the raw material is improved, the activation reaction effect is improved, the specific surface area of the finished porous carbon is increased, and the quality of the finished porous carbon is guaranteed.
Owner:HUAXIAN DACHAOLIN BUSSAN