114 results about "Sodium metasilicate" patented technology

The invention relates to a high-strength stable solid waste-based composite cementing material and a preparation method and application thereof in the field of building materials. The high-strength stable solid waste-based composite cementing material is prepared from the following raw materials in parts by weight: 70-85 parts of composite solid waste micro powder; 10 to 20 parts of Portland cement clinker; 3-8 parts of a composite activator; 0.5 to 2 parts of a nano-scale function regulator; wherein the composite solid waste micro powder is prepared by mixing and grinding the following raw materials in parts by weight: 40-60 parts of blast furnace slag powder; 20 to 30 parts of fly ash; 10-20 parts of chemically modified electrolytic manganese residue powder; and 5-15 parts of steel slag powder. According to the preparation method, sodium metasilicate is adopted to assist medium-temperature calcination to chemically modify the electrolytic manganese residues, so that not only is the gelation activity of the electrolytic manganese residues effectively excited, but also free-state manganese, cadmium and other heavy metal ions in the electrolytic manganese residues are fixed in situ in newly formed zeolite-like silicate mineral lattices through thermochemical reconstruction; and a brand new technical path is opened up for safe and high-value utilization of the typical hazardous waste, namely the electrolytic manganese residues.

The invention relates to the technical field of ceramic glaze water, in particular to ceramic glaze water capable of continuously releasing negative ions based on a rare earth material and a preparation method of the ceramic glaze water. Comprising a negative ion material, sodium polystyrenesulfonate, an immobilized bacterium preparation, carbon nanotube modified graphene oxide, turbo stone, modified sepiolite, nano-zinc oxide, sodium hexametasilicate, polyethylene glycol, a composite antioxidant, a coalescing agent, a slow-release carrier and deionized water. The negative ion material is formed by mixing low-radioactivity commercial rare earth powder, tourmaline and opal according to the mass ratio of (3-4): (4-5): 1. According to the invention, the preparation cost of the glaze water is reduced and the production efficiency is improved by optimizing the composition and compounding mode of the negative ion material, enhancing the stability of the bacterial preparation and simplifying the preparation process, meanwhile, the negative ion release durability, the ceramic surface adhesive force and the antibacterial property are remarkably enhanced, and the requirements of industrial production and practical application are met.

The invention discloses polymer-based anti-crack concrete and a preparation method thereof, and relates to the technical field of concrete. When the polymer-based anti-crack concrete is prepared, acrylic acid is grafted on the surfaces of pretreated polypropylene particles to prepare modified polypropylene particles; coating sodium metasilicate with sodium alginate to prepare a self-repairing microcapsule; the preparation method comprises the following steps: hydrolyzing 3-glycidyl ether oxypropyl trimethoxy silane, and grafting the hydrolyzed 3-glycidyl ether oxypropyl trimethoxy silane on the surface of silicon dioxide to prepare modified silicon dioxide; mixing the modified polypropylene particles, basalt fibers and polyacrylonitrile fibers to obtain a solid functional component; cement, slag powder, silica fume, an expanding agent, a solid functional component, modified silicon dioxide, a water reducing agent, an air entraining agent, deionized water, river sand, gravel and the pre-wetted self-repairing microcapsule are mixed, and the polymer-based anti-crack concrete is prepared. The polymer-based anti-crack concrete prepared by the invention has excellent anti-crack, freeze-thaw-resistant and self-repairing properties.

The invention discloses a polyaluminum chloride-based flocculant as well as a preparation method and application thereof, belongs to the technical field of preparation of flocculants, and aims at solving the technical problem that the flocculation performance and the stability of a flocculant in the prior art need to be further improved. The surface charges of iron-based particles are adjusted through sodium citrate, so that the problem of particle agglomeration is effectively avoided, the coating uniformity of microgel is improved, and the specific surface area of the material is increased; abundant cation sites are introduced into the trimethylamine modified chitosan, so that the electrostatic adsorption capacity of the microgel on anion pollutants is remarkably enhanced, and meanwhile, the electrical property and the stability of a system are improved; the addition of sodium metasilicate further promotes the modified PAC to form a stable Al-O-Si bridging structure, the material is endowed with good three-dimensional skeleton strength and composite interface stability, the three components cooperate with each other and play key roles in particle dispersity, charge construction and skeleton stability, and finally, an efficient, stable and storable composite flocculation system is constructed.

The invention discloses a fluoride-free strong-acid-free reverse flotation method for extracting a high-purity quartz sand flotation product from granite pegmatite, and belongs to the technical field of mineral flotation. The method comprises the following steps: carrying out graded crushing and ore grinding on granite pegmatite to obtain slurry to be treated; carrying out wet magnetic separation on the to-be-treated slurry to obtain ore pulp after magnetic separation and magnetic-containing minerals; the pH value of the ore pulp is not adjusted, reverse flotation is carried out in the presence of a quartz mixed inhibitor, and a feldspar product and a quartz product are obtained; the quartz mixed inhibitor is a combination of a component A and a component B, wherein the component A is selected from at least one of sodium metasilicate, sodium tripolyphosphate, sodium hexametaphosphate, carboxymethyl cellulose and salinized water glass; the component B is selected from at least one of guar gum, Arabic gum, sodium humate and citric acid. The method is free of fluorine and strong acid, green and efficient, and is a method for preparing high-purity quartz sand from pegmatite with high industrial application feasibility.

The invention discloses a preparation method of a magnesium alloy surface micro-arc oxidation corrosion inhibition coating, which comprises the following steps: placing a magnesium alloy as an anode in a micro-arc oxidation electrolyte, and carrying out constant-current micro-arc oxidation by taking stainless steel as a cathode to form the micro-arc oxidation corrosion inhibition coating on the magnesium alloy surface, the micro-arc oxidation electrolyte comprises 5-30 g / L of sodium hydroxide, 20-50 g / L of sodium metasilicate, 5-10 g / L of sodium carbonate and 1-8 g / L of a micro container, and a solvent is water; the carrier of the microcontainer is mesoporous silica, the inorganic corrosion inhibitor is located on the inner side of a mesoporous channel of the mesoporous silica, and the organic corrosion inhibitor is located on the outer side of the mesoporous channel; and part of the organic corrosion inhibitor and divalent metal ions form an insoluble complex to cover the port of the mesoporous channel. The coating prepared through the method has the self-catalysis dual self-repairing function, the self-repairing problem of local damage of the micro-arc oxidation coating is further solved, and then the corrosion protection performance of the magnesium alloy micro-arc oxidation coating is further improved.

The present application belongs to the technical field of cleaning supplies, and particularly relates to a high-efficiency blood-stain removing powder and a preparation method thereof. The high-efficiency blood-stain removing powder provided by the present application comprises the following raw materials and mass fractions: 45.0-65.0 parts of sodium percarbonate, 12.0-18.0 parts of an auxiliary agent, 11.0-18.0 parts of an auxiliary cleaning agent, 4.0-7.0 parts of anhydrous sodium metasilicate, 1.0-3.0 parts of a non-ionic surfactant, 1.5-2.5 parts of an enzyme preparation, 0.2-1.0 parts of an antibacterial agent, 1.0-3.0 parts of a thickening agent, and 0.1-0.5 parts of a fragrance; the auxiliary cleaning agent is composed of sodium carbonate and sodium alpha-alkenyl sulfonate at a mass ratio of 8.0-12.0:3.0-6.0. When the high-efficiency blood-stain removing powder of the present application is used, no complex operation is needed, and blood stains can be easily removed through simple soaking, without laborious scrubbing, so that the effect of 'quick cleaning and complete stain removal' is truly achieved.

The application discloses a tundish slag line dry material, and relates to the technical field of tundish refractory materials. The mass percentage of each raw material component in the tundish slag line dry material is as follows: 26-30% of 3-1mm fused magnesite, 22-28% of 1-0mm fused magnesite, 20-27% of 200-mesh fused magnesite, 1.5-2% of trisodium phosphate hexahydrate, 2-2.5% of sodium metasilicate nonahydrate, 1-1.5% of adipic acid, 4-5% of calcium carbonate, 0.3-0.5% of vermiculite, and the rest of 5-3mm fused magnesite. The application adopts a new composite binder system, solves the environmental protection problem of a traditional phenolic resin binder, and significantly improves the medium-temperature and high-temperature strength, corrosion resistance, thermal shock resistance and heat insulation performance of the magnesia dry material through the synergistic effect among the components, so that the overall optimization of the material performance is realized.

The invention discloses a steel slag-mineral slag based cementing material for a road base and a preparation method thereof, and belongs to the field of road engineering materials. According to the present invention, the aging steel slag and high slag double solid waste main body (the total doping amount is more than or equal to 70%) is matched with the sodium metasilicate-calcium hydroxide-sodium sulfate ternary composite activator, the calcium sulphoaluminate micro-expansion component and the nanometer C-S-H seed crystal, such that the volume stability can be met under the high content of the steel slag free oxide, the early strength is high, the anti-cracking performance is good, and the anti-cracking performance is good. The cement can completely replace cement to be used for base layers of expressways and heavy-duty roads, and has remarkable economic and environmental benefits.

This invention relates to the field of spray system technology, and more particularly to an alkaline spray system for the production of ethyl chloroformate, comprising the following steps: S1, adding tetramethylammonium hydroxide to water, heating to room temperature, stirring until completely dissolved, adding modified sodium metasilicate, disodium ethylenediaminetetraacetate, and sodium lignosulfonate, controlling the temperature and stirring, filtering to obtain an alkaline solution; S2, turning on the power to the control system, ensuring the control system operates normally, setting the operating parameters of the spray system, starting the alkaline solution pump, drawing the alkaline solution from the storage tank, conveying it through pipelines to the spray heads, adjusting the pump's output flow rate, and starting intermittent, uniform spraying of the alkaline solution. The waste liquid after spraying flows through pipelines into a sedimentation tank for post-treatment. The alkaline spray system of this invention can significantly improve the purification efficiency of acidic gases, heavy metal ions, and organic pollutants in waste gas.

An environment-friendly cutting fluid comprises, by weight percentage, 2-20% of long-chain dibasic acid-amino acid, 1-20% of amino acid long-chain alcohol ester, 1-20% of glycerol, 0.1-5% of sodium metasilicate and the balance of water, the long-chain dibasic acid-amino acid being obtained by connecting two amino acids to the carboxyl groups at both ends of the long-chain dibasic acid, and the amino acid long-chain alcohol ester being an alcohol ester compound formed by the reaction of amino acid and long-chain alcohol. The combination of the long-chain dibasic acid-amino acid and the amino acid long-chain alcohol ester makes the cutting fluid have strong lubricating performance and be applicable to the processing of aluminum alloy. The long-chain dibasic acid-amino acid and the sodium metasilicate have strong aluminum corrosion inhibition capacity, and their combination can protect the aluminum alloy during use.

The invention discloses a system for preparing functional water rich in high-concentration sodium metasilicate, which comprises a source water tank, the source water tank is connected with an inlet of a source water pump, an outlet of the source water pump is connected with an inlet of a quartz sand filter through a pipeline, and a flowmeter and a valve are arranged on the pipeline. An outlet of the quartz sand filter is connected with an inlet of the activated carbon filter, an outlet of the activated carbon filter is connected with an inlet of the ultrafiltration equipment, and an outlet of the ultrafiltration equipment is connected with an inlet of the ion exchange assembly; an outlet of the ion exchange assembly is sequentially connected with a storage and conversion assembly, a double-group reverse osmosis host, a finished product water storage tank, a constant-pressure water supply pump, a diatomite filter, a titanium rod filter and a UV sterilizer. According to the invention, the conversion of the silicon element can be more effectively promoted, and the purity and activity of the biological organic silicon element are greatly improved.

The invention discloses a special compound fertilizer for food crops as well as a preparation method and application thereof, and belongs to the technical field of organic and microbial fertilizers. The compound fertilizer comprises a basic fertilizer and an organic biological fertilizer source, wherein the basic fertilizer is prepared from sulfur coated urea, urea, calcium superphosphate, potassium chloride, sodium metasilicate and oyster shell powder; the organic biological fertilizer source is composed of a vinasse fermentation product, a microbial activity protective agent and lignosulfonate. The vinasse fermented product is prepared by carrying out three-stage solid state fermentation on vinasse by adopting a compound bacterium suspension consisting of mycobacillus halophilus and ocean sediment vesicular bacillus. Through synergistic fermentation of functional strains, compounding of a microbial active protective agent and introduction of a slow-release nitrogen source and stress-resistant components, synergistic interaction of efficient release of nutrients, soil improvement and improvement of crop stress resistance is realized. The compound fertilizer is suitable for grain crops such as wheat and rice, can remarkably improve root activity, yield and stress resistance, and has a wide application prospect.

The invention discloses fiber-free seawater and sea sand alkali-activated ultrahigh-strength concrete cured at normal temperature. Solid potassium carbonate and solid sodium metasilicate are used as composite excitants, under the condition that fibers are not doped, seawater and sea sand are used as water sand for mixing, industrial solid waste slag and silica fume are used as precursor materials, quartz powder is used as a filling material, borax is used as a retarder, the proportion of all raw material components is optimized, and a single-component forming mode is adopted, so that the fiber-reinforced concrete is prepared. The preparation of the ultrahigh-strength concrete can be realized under a normal-temperature sealed curing condition. According to the invention, the problem that the ultra-high strength performance and excellent flow / setting performance of the alkali-activated concrete are difficult to consider is effectively solved, and the popularization and application of the alkali-activated ultra-high strength concrete in actual engineering can be promoted. The technological process is simple, and the production energy consumption and cost are low; seawater and sea sand are used as water sand for mixing concrete, development and utilization of marine resources are promoted, dependence of concrete materials on freshwater river sand resources is reduced, and green and sustainable development of the building industry is facilitated.

The invention discloses a new energy battery aluminum shell microbial water-based cleaning agent and a preparation method thereof, and belongs to the field of chemical engineering, the new energy battery aluminum shell microbial water-based cleaning agent comprises 10-20% of potassium hydroxide, 5-10% of sodium metasilicate pentahydrate, 1-5% of sodium gluconate, 1-5% of a corrosion inhibitor, 1-5% of a microbial nutrient, 1-5% of a penetrant, 1-5% of isomeric alcohol ethoxylates, 1-5% of sodium alkyl naphthalene sulfonate, 1-5% of an auxiliary agent, and 1-5% of sodium lignin sulfonate. 0-2% of a polyether defoaming agent, 0-1% of microbial bacteria and the balance of deionized water, totaling 100%. The product disclosed by the invention can decompose organic matters into harmless simple substances by utilizing a microbiological degradation technology and combining with an efficient emulsifying surfactant, so that the wastewater discharge is reduced, and the wastewater treatment cost is reduced.

The application discloses a rough grinding liquid for diamond substrates and a preparation method thereof, and a rough grinding method for diamond substrates, and relates to the technical field of diamond processing. The rough grinding liquid for diamond substrates comprises the following components in mass parts: diamond 0.5-1.5 parts, dispersing agent 0.1-1 part, pH regulator 1-5 parts, suspending agent 0.1-1 part, and water 88-98 parts; wherein the D50 of the diamond is 10-50 mu m; the suspending agent comprises at least one of xanthan gum, carbomer, sodium polyacrylate and bentonite; and the dispersing agent comprises at least one of polymaleic anhydride, sodium pyrophosphate, anhydrous sodium metasilicate and polyacrylamide. The technical scheme of the application can solve the problems of low grinding rate, large surface roughness and high total thickness deviation of the existing grinding liquid for diamond substrates by adjusting the particle size of the abrasive and the composition of the suspending agent and the dispersing agent.

The present application relates to inorganic cementing material, solid waste resource utilization and soil solidifying material technical field, specifically relates to a kind of preparation method of micro-nano solid waste base soil solidifying agent.It aims at solving the technical problems of single function and insufficient durability in prior art.The present application grinds granulated blast furnace slag and calcium silicate hydrate seed together, to obtain modified slag micro powder;Steel slag and fly ash are ultrafine ground to obtain steel slag-fly ash composite micro powder;Preparation mesoporous nano slag-biochar composite core, after impregnation load sodium metasilicate and nano zero-valent iron, in turn deposit calcium alginate-cystosine intermediate shell layer and silane coupling agent modified nano silicon dioxide and nano waste concrete recycled micro powder composite outer shell layer, to obtain multi-layer coated active particle;Silicon dioxide, sodium sulfate and nano calcium hydroxide are ball milled into composite activator;The above components are compounded with dispersion stabilizer under inert gas protection.

The present application relates to the field of chemical material environmental protection technology, and particularly to a method for preparing nine-water and five-water sodium metasilicate from by-product lye in the process of producing zirconium oxychloride by alkali fusion method.The method comprises the following steps: removing zirconium from the by-product lye by once concentration and filtration, then adopting stepwise cooling and temperature control crystallization after twice concentration of the filtrate, and finally obtaining nine-water sodium metasilicate by solid-liquid separation through a scraper type centrifuge and obtaining five-water sodium metasilicate by drying through a vibrating fluidized bed.In the preparation process, no reagent for adjusting modulus is needed, and through specific step-by-step concentration and zirconium removal process, full component utilization of waste liquid is realized.The nine-water and five-water sodium metasilicate products prepared by the method have product indexes meeting the requirements of superior products, and have the characteristics of large crystal particles, less mother liquor entrainment, high whiteness, and low water insoluble substance.The process not only significantly reduces the production cost, but also realizes green preparation of non-phosphorus washing aid and closed circuit circulation of zirconium resources, and has significant economic benefits and environmental protection value.

The invention belongs to the technical field of polymer catalysis, and discloses a MeOH-difunctional zirconium-based heteropolyacid catalytic system as well as a preparation method and application thereof. The preparation method comprises the following steps: S1, preparing a sodium tungstate aqueous solution and a sodium metasilicate aqueous solution, adding a hydrochloric acid solution and the sodium metasilicate aqueous solution into the sodium tungstate aqueous solution, adjusting the pH value, standing, and adding potassium chloride to obtain SiW-1; s2, dissolving SiW-1 in deionized water, adjusting the pH value, standing, and adding potassium chloride to obtain SiW; and S3, dissolving SiW in deionized water, adjusting the pH value, adding a zirconium oxychloride aqueous solution, adjusting the pH value again, adding cesium chloride, stirring, carrying out suction filtration, collecting precipitate, grinding into powder, and adding the powder into MeOH to obtain the heteropolyacid catalytic system. The heteropolyacid catalytic system disclosed by the invention is excellent in catalytic effect, simple and convenient to prepare and capable of being recycled.

The invention discloses a high-liquid-limit silt modifying material for construction backfilling and a preparation method, and relates to the technical field of high-liquid-limit silt improvement. The material comprises high liquid limit silt, and further comprises a substrate gel system, a polymeric lightweight aggregate; and a biopolymer organic modifier. Wherein the substrate gelling system is selected from a multi-component solid waste gelling system which comprises fly ash, furnace bottom slag, desulfurized gypsum and cement and has a specific cement-gelling ratio of 0.20 to 0.26 and a water-gelling ratio of 0.60 to 0.75; or a one-pack dry alkali-activated geopolymer gel system which contains a silicon-aluminum precursor and solid anhydrous sodium metasilicate and satisfies the specific equivalent weight of 4-8% and the molar ratio of 3.5-5.5; the polymer lightweight aggregate is EPS particles, the particle size is 3-4 mm, and the volume fraction is 15-25%; the biopolymer organic modifier is guar gum, and the doping amount of the biopolymer organic modifier is 0.2-0.6% of the total dry weight. The modified material has the fluidity of 220 to 260 mm, the bleeding rate, the 28-day strength of 1 to 8 MPa and the water stability coefficient.

The invention discloses a lightweight aggregate, a preparation method thereof and a building material. The lightweight aggregate structurally comprises an inner core and a shell layer coating the surface of the inner core, the core material is recycled concrete fine aggregate; the raw materials for preparing the shell layer comprise a solid component, a sodium metasilicate pentahydrate alkali activator and water, and the solid component comprises slag, recycled concrete micro powder, waste incineration fly ash and waste glass powder. A core-shell structure design and a single-component alkali excitation technology are adopted, multi-source solid waste materials including recycled concrete fine aggregate, micro powder and the like are prepared into the lightweight aggregate material with the high cylinder compressive strength, efficient recycling of building waste is achieved, dependence on calcination or cement doping in a traditional lightweight aggregate preparation process is avoided, and the lightweight aggregate material with the high cylinder compressive strength is obtained. Energy consumption and carbon emission are effectively reduced, and the method has outstanding green and environment-friendly advantages and can be widely applied to engineering scenes for preparing lightweight aggregate concrete.

The invention provides an acidic decolorizing agent. The invention relates to an adhesive which comprises the following components in parts by weight: 30-34 parts of hydrolyzed wheat starch, 28-32 parts of wheat flour, 12-16 parts of potassium persulfate, 4-8 parts of ammonium persulfate, 3.5-7.5 parts of hydroxyethyl cellulose, 1.5-5.5 parts of silicon dioxide, 1-2 parts of hydroxypropyl trimethyl ammonium chloride hydrolyzed collagen, 0.8-1.3 parts of guar gum and 0.8-1.3 parts of sodium metasilicate. The invention relates to an anti-rust agent, which is prepared from the following components in parts by weight: 0.8 to 1.3 parts of magnesium stearate, 0.8 to 1.3 parts of magnesium carbonate, 0.8 to 1.3 parts of disodium ethylene diamine tetraacetate, 0.08 to 0.12 part of hydrolyzed keratin, 0.4 to 0.8 part of sodium laureth sulfate, 0.3 to 0.5 part of titanium dioxide, 0.3 to 0.5 part of glucose and 0.1 to 0.3 part of mineral oil.

The invention provides a carbon-based Cu-Si diatomic nano-enzyme and a preparation method and application thereof. Dopamine hydrochloride is used as a carbon source, anhydrous copper chloride is used as a copper source, sodium metasilicate pentahydrate is used as a silicon source, stirring is performed for 1 h, then a trihydroxymethyl aminomethane buffer solution is used for adjusting the pH value of the solution, then the solution is calcined in a tubular furnace at 400 DEG C for 3 h, and the carbon-based Cu-Si diatomic nano-enzyme (CuSiDA) is synthesized. The designed Cu-Si diatomic nano-enzyme with the carbon base is shown to respond to degradation in a tumor microenvironment, and has relatively high peroxidase-like activity and excellent photo-thermal performance. The three advantages endow the catalyst with high catalytic activity. And finally, due to efficient near-infrared second-region photothermal conversion capability (the photothermal conversion efficiency is 48.5%), photothermal enhanced catalytic treatment can be realized. According to the strategies of the steps, the carbon-based Cu-Si diatomic nano-enzyme which has biological safety and cycling stability and can simultaneously realize excellent optical treatment performance and chemical kinetics treatment performance can be developed.

In one embodiment, a building material derived from a geopolymer formulation comprises sand, ground granulated blast furnace slag (GGBFS), fly ash, sodium tetraborate, boric acid, zeolite, sodium caseinate, and SC-9. Optionally, the formulation also comprises additional constituents like sodium metasilicate, sodium hydroxide, magnesium oxide, hemp, basalt fibers, aggregates, and fillers. The building materials have high compressive strength, flexural strength, tensile strength, impact resistance, and thermal resistance.

The invention discloses a metakaolin-based geopolymer material with an alkali or acid slow-release function and a preparation method, the metakaolin-based geopolymer material is prepared from the following raw materials in parts by weight: 100 parts of metakaolin, 0-27 parts of sodium metasilicate nonahydrate, an activator and 81-110 parts of water, the activator is an alkali activator or an acid activator, the alkali activator is 9-27 parts of sodium metasilicate nonahydrate, the acid activator is 8-12 parts of sodium metasilicate nonahydrate, and the water is 8-12 parts of sodium metasilicate nonahydrate. The acid activator is 12-36 parts of phosphoric acid solution with the concentration of 75%. Therefore, the acid-activated metakaolin geopolymer and the alkali-activated metakaolin geopolymer both show dual functions of slow release and buffering, and a geopolymer skeleton can gradually release acidic or alkaline species in water and continuously provide neutralizing ions, so that the stability of the pH of a system is maintained on a longer time scale.

The invention discloses a preparation method of a concrete crystal nucleus early strength agent and the prepared concrete crystal nucleus early strength agent. The preparation method of the concrete crystal nucleus early strength agent comprises the following steps: (1) adding sodium acetate and calcium acetate into water to form an acetate solution, wherein the temperature of the solution is not lower than 90 DEG C; (2) dissolving sodium metasilicate nonahydrate in water, and heating to not lower than 90 DEG C to form a sodium silicate solution; (3) heating the hot melt adhesive to be not lower than 90 DEG C and completely melting to obtain hot melt adhesive slurry; (4) stirring the hot melt adhesive slurry, slowly dropwise adding an acetate solution and a sodium silicate solution at a constant speed, and synchronously performing ultrasonic dispersion to obtain a mixed emulsion; and (5) spraying the mixed emulsion into the air through atomization equipment, and continuously blowing the mixed emulsion with warm air so that the mixed emulsion floats in the air and naturally falls to form the concrete crystal nucleus early strength agent. The crystal nucleus early strength agent prepared by the method can effectively improve the early strength of concrete, reduce the volume shrinkage of the concrete and improve the construction efficiency in winter.

The invention relates to the technical field of plant culture, in particular to a hydroponic nutrient solution for enhancing the rooting ability of tea trees and a preparation method thereof.Ammonium sulfate, aluminum nitrate, monopotassium phosphate, potassium sulfate, calcium sulfate, magnesium sulfate, ferrous sulfate, sodium metasilicate, boric acid, manganese sulfate, zinc sulfate, copper sulfate and sodium molybdate are added into 1 L of distilled water according to the molar amount. According to the method, by optimizing the nutrient element ratio, adjusting the pH value suitable for rooting of the tea trees and reasonably controlling ventilation, temperature, humidity and illumination conditions in the culture process, the tea trees can rapidly root, the survival rate is increased, and good scientific research value and social benefits are achieved.

The invention relates to a high-strength silicon-aluminum polymeric material and a preparation method thereof. According to the technical scheme, the method comprises the following steps: ultrasonically washing quartz, carrying out solid-liquid separation, and drying to obtain pretreated quartz; mixing tetraethoxysilane, water and absolute ethyl alcohol, adjusting the pH value, heating and stirring to obtain a modified solution; mixing the pretreated quartz with the modified liquid, stirring, carrying out solid-liquid separation, and drying to obtain modified quartz; mixing sodium metasilicate with water to obtain an alkali activator; mixing a silicon-aluminum raw material, the modified quartz and an alkali activator, and uniformly stirring to obtain silicon-aluminum polymer material slurry; and pouring the silicon-aluminum polymeric material slurry into a mold, and carrying out first maintenance, demolding and second maintenance to obtain the high-strength silicon-aluminum polymeric material. The preparation method is simple in process and suitable for large-scale production, and the prepared high-strength silicon-aluminum polymeric material has the characteristics that a silicon-aluminum structure is compactly combined with a quartz interface, the overall structure is stable, and the compressive strength of the silicon-aluminum polymeric material is effectively improved.

In one embodiment, a geopolymer formulation for a building material that comprises sand, ground granulated blast furnace slag (GGBFS), fly ash, sodium tetraborate, boric acid, zeolite, sodium caseinate, and SC-9. Optionally, the formulation also comprises additional constituents like sodium metasilicate, sodium hydroxide, magnesium oxide, hemp, basalt fibers, aggregates, and fillers. In another embodiment, there is described a building material derived from the geopolymer formulation. The building materials may have high compressive strength, flexural strength, tensile strength, impact resistance, and thermal resistance. In yet another embodiment, the present disclosure describes a method of manufacturing a dry geopolymer formulation. The method comprises, obtaining the various constituents of the geopolymer formulation and mixing the constituents to a homogenous mixture. In yet another embodiment, there is described a method of manufacturing a building material comprising obtaining the dry geopolymer formulation, mixing the hydrated formulation, dispensing the formulation; and curing the formulation.

This invention proposes an environmentally friendly magnesium-aluminum spinel protective agent for high-temperature environments and its preparation method, relating to the field of high-temperature industrial kiln lining protection. The protective agent comprises the following components by mass percentage: 55-70 wt% magnesium-aluminum spinel powder, 8-15 wt% activated alumina micro powder, 5-10 wt% lightly calcined magnesium oxide powder, 5-12 wt% aluminum sol binder, 1-3 wt% high-temperature wetting accelerator, 0.3-1.0 wt% polycarboxylate dispersant, 0.2-0.8 wt% organic cellulose ether thickener, and the balance being deionized water; wherein the particle size distribution of the magnesium-aluminum spinel powder satisfies D50≤10μm and D90≤25μm; the high-temperature wetting accelerator is at least one of calcium borate, sodium metasilicate, or tetrabutyl titanate; the viscosity of the protective agent slurry at 25℃ is 1800-3500 mPa·s. The protective agent can be applied directly to the surface of high-temperature substrates at 800–1350°C without cooling the substrate to medium or low temperatures, thus reducing equipment downtime to 4–6 hours.