1804 results about "Sodium silicate" 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 cement-based repair mortar, and particularly discloses a preparation method of an early-strength quick-hardening anti-carbonization cement-based repair mortar material, which comprises the following steps: (1) uniformly mixing calcium silicate or pseudo-wollastonite and saturated lime water, adding basalt fiber, and carrying out heating reaction, and uniformly mixing the fiber with sodium silicate powder, calcining in a protective atmosphere, uniformly mixing the obtained fiber with saturated lime water, and drying to obtain the anti-carbon modified fiber. And (2) uniformly mixing red mud, silica fume, sodium silicate powder and water, curing, grinding, and calcining the powder to obtain the anti-carbonization additive. And (3) mixing sulphoaluminate cement, fine aggregate, solid waste-based filler, the anti-carbon modified fiber, the anti-carbonization additive, a water reducing agent and a defoaming agent, adding mixing water, and uniformly stirring to obtain the cement-based repairing mortar material. According to the invention, the carbonization resistance of the sulphoaluminate cement-based repair mortar is effectively improved, the durability is improved, and the problem of strength shrinkage in the later period is prevented.

The invention relates to the technical field of porcelain, in particular to porous antioxidant composite porcelain and a preparation method thereof, and the preparation method comprises the following steps: weighing the following raw materials in parts by weight: 35-40 parts of clay, 10-15 parts of aluminum oxide, 6-10 parts of an aluminum nitride-doped modified homogenizing agent, 5-9 parts of kaolin and 5-8 parts of a sodium silicate blender. According to the porous anti-oxidation composite porcelain, clay is adopted as a matrix, aluminum oxide and kaolin are added to be matched with an aluminum nitride modified homogenizing agent and a sodium silicate blender, the raw materials are blended and synergized, compression molding is performed, and finally homogenizing sintering is performed, so that the porous anti-oxidation composite porcelain is obtained. The porous performance, the high-temperature oxidation resistance and the mechanical bending strength performance of the obtained composite porcelain are harmoniously improved, and meanwhile, the stability effect of the product is remarkable under different degrees of corrosion conditions.

The present invention relates to a sealing method for high-flow water inrush at a side wall of a foundation pit, the method comprising: calculating the minimum radius of a counter-pressure soil berm on the basis of the flow time of a liquid slurry in the counter-pressure soil berm being not less than the chemical setting time of the liquid slurry; piling up filtering sand bags on a foundation pit excavation face at a water inrush point, and constructing the counter-pressure soil berm; constructing annular grouting holes at the foundation pit on the outside of support piles and a cut-off curtain; according to the planar arrangement of the annular grouting holes, successively injecting a double-liquid slurry formed by mixing a cement slurry and sodium silicate into the annular grouting holes; inspecting the water seepage condition on the periphery of the counter-pressure soil berm until no water seepage occurs on the periphery of the counter-pressure soil berm; and excavating the counter-pressure soil berm layer by layer until the excavation reaches the pit bottom without water seepage observed at a side wall of the foundation pit. The present invention has the beneficial effects that: the size of the counter-pressure soil berm is optimally designed on the basis of the condition that the flow time of the double-liquid slurry in the soil berm is longer than the setting time, so as to solve the problems of slurry setting failure and poor grouting and sealing effects, thus saving a large amount of grouting materials, and reducing economic loss caused by secondary sealing.

The invention relates to the technical field of flux-cored wires. The preparation method comprises the following steps: weighing the following raw materials in parts by weight: 4-6 parts of chromium carbide powder, 7-9 parts of molybdenum powder, 6-8 parts of nickel powder, 10-15 parts of niobium powder, 15-18 parts of tungsten carbide powder, 7-11 parts of a modified titanium carbide agent, 5-8 parts of a blending agent added based on boron and 2-4 parts of 30-mesh natural graphite; 1-2 parts of sodium fluosilicate; 1-2 parts of aluminum powder; and 70-75 parts of iron powder. The flux-cored wire can adapt to complex service environments of parts such as rollers and continuous casting crystallizers in the metallurgical industry, the service life of the parts subjected to surfacing repair is prolonged, the production efficiency of the parts subjected to surfacing repair is improved, the obtained flux-cored wire achieves balance of high-temperature performance, mechanical performance and low-temperature stability, and the comprehensive applicability of products is improved.

The invention discloses a grouting reinforcement material and a preparation method and application thereof, and the method comprises the following steps: mixing a sodium silicate aqueous solution, a chain extension cross-linking agent, distilled water and a composite catalyst to obtain a component A; reacting the polymethylene polyphenyl polyisocyanate with polyether polyol to obtain an isocyanate prepolymer, and carrying out self-polymerization on the polymethylene polyphenyl polyisocyanate under the action of a catalyst to obtain an isocyanate polymer; the preparation method comprises the following steps: mixing a component A and a component B according to a mass ratio of (1.2: 1)-(1: 1.2), then stirring an isocyanate prepolymer, an isocyanate polymer, a plasticizer and a diluent at room temperature and constant temperature to obtain the component B, and finally mixing the component A and the component B according to a mass ratio of (1.2: 1)-(1: 1.2) to obtain the target grouting reinforcement material. The invention aims to realize effective compounding of an organic phase and an inorganic phase, and the prepared reinforcing material has early strength and toughening, low heat release, and environment-friendly grouting performance capable of being cured in water.

The invention relates to the technical field of coating preparation, and discloses a high-adhesion quick-drying inorganic zinc silicate shop primer and a preparation method thereof.The high-adhesion quick-drying inorganic zinc silicate shop primer is prepared from modified zinc powder, modified graphite powder, a sodium silicate solution, alpha-phase nanometer AlO, a quick-drying agent, an adhesion promoter, heat-resistant filler, a dispersing agent, a defoaming agent and a diluting solvent; the quick-drying agent is prepared by compounding zinc naphthenate, EDTA and titanium isopropylate according to the mass ratio of 1: (0.2-0.3): (0.4-0.6), the quick-drying agent accelerates the reaction by catalyzing hydrolysis of silicate through zinc salt, chelating of EDTA and metal ions, titanium isopropylate provides titanium ions to synergistically form a film and improve the quick-drying efficiency, the adhesion promoter is prepared by compounding KH-560 and E-44 epoxy resin according to the mass ratio of 3: 1, and the adhesion promoter is prepared by compounding epoxy resin and epoxy resin. The adhesion promoter enhances interface mechanical occlusion and adhesion through silane bonding base materials and epoxy resin, other raw materials are matched with the adhesion promoter to accelerate the drying speed of the primer, and a coating coated with the primer is not prone to stripping and peeling. The application has the effects of improving the adhesive force and drying speed of the inorganic zinc silicate shop primer.

A “Passive Radiative Coating” (PRC) is designed to dissipate heat generated mainly by solar radiation, intended for use in the manufacture of overhead conductors and cables. Additionally, this coating can dissipate heat produced by the conductors themselves, known as the Joule effect, providing environmental protection and significantly improving heat dissipation capacity. The PRC is composed of at least one filler, at least one binder, and at least one surfactant. In particular, the use of calcium carbonate and / or barium sulfate as fillers, and epoxy resins, alkyd varnishes, polyurethane dispersions, casting resins, silicone-based varnishes, and sodium silicate as binders are highlighted. The surfactant is used to stabilize the mixture and acts as a stabilization additive.

The invention relates to the technical field of heavy metal recovery, in particular to a method for recovering heavy metal from metal waste. Comprising the following steps: preparing silicon-tungsten composite acid salt; preparing heteropolyacid powder; preparing a resin heteropolyacid composite material; heavy metals are recovered from metal wastes by a resin adsorption method. The silicon-tungsten composite acid salt is prepared under mild conditions through reaction of sodium metasilicate, sodium tungstate and potassium chloride, the operation is simple, the conditions are easy to control, the silicon-tungsten composite acid salt has rich active sites and a large specific surface area, the surface of the silicon-tungsten composite acid salt carries negative charges, and the surface of the silicon-tungsten composite acid salt is not prone to damage. Compared with a traditional chemical precipitation method, the method for extracting the heavy metal by using the silicon-tungsten composite acid salt does not need to add a large number of chemical reagents, and secondary pollution is reduced.

The invention belongs to the field of material protection, and particularly relates to a method for improving spraying efficiency and adhesive force by adding a binder in the plasma spraying process. The binder comprises one or more of bentonite, silicon dioxide, borax, sodium silicate and aluminum phosphate. The device has the function of quickly melting spraying particles at high temperature and adhering the spraying particles to a spraying substrate, so that the powder spraying efficiency is improved, and the production efficiency is improved. The method comprises the following steps: firstly, carrying out sand blasting treatment on a spraying base material, removing dust and impurities on the surface to enable the roughness to reach 8-10 microns, weighing, and measuring the surface area to be sprayed; and then weighing the binder and putting the binder into a drying oven to be dried at 120 DEG C; the method comprises the following steps: uniformly mixing a binder and an analytically pure nano spraying material according to a certain proportion, and pouring into a plasma spraying raw material tank; and spraying is carried out at the position with the voltage of 30-50 V, the current of 300-600 A, the air pressure of 8 Mpa and the distance of 80-120 mm. The spraying time is 3-5 min, and after spraying is completed, the powder spraying amount is calculated by weighing the mass difference of the base material before and after the base material is weighed. And by adding the binder, the powdering rate is increased from 30.79% to 51.24%, the consumption of spraying materials is greatly reduced, and the working efficiency is improved.

The invention discloses a composite system geopolymer grouting material and a preparation method thereof. The composite system geopolymer grouting material comprises the following raw materials in percentage by mass: 50-70% of coal gangue, 10-30% of fly ash and 10-30% of cement. Functional additives: 5%-20% of desulfurized gypsum and 5%-15% of bentonite; the composite exciting agent is formed by compounding carbide slag and sodium silicate according to the mass ratio of 1: 1-1: 2. The geopolymer is excellent in mechanical property, meets engineering requirements, is remarkable in environmental protection benefit, conforms to double-carbon target low-carbon process innovation: a calcination-free process: traditional high-temperature calcination is abandoned (the temperature needs to be 550-900 DEG C), carbon emission is reduced by more than 30% (compared with a contrast, the carbon emission of a traditional process is increased by 35%), and the geopolymer conforms to the green positioning of low energy consumption and low three wastes of geopolymers. The cost advantage is prominent, the economic value is remarkable, the raw material cost is reduced, specifically, the coal gangue (low-cost solid waste) is used for replacing 30%-50% of cement, and the comprehensive raw material cost is reduced by 40% (compared with a traditional cement-based grouting material).

The invention discloses stable silicon dioxide microspheres as well as a preparation method and application thereof. Mixing a sodium silicate diluent and an organic acid aqueous solution to form colloidal particles, and carrying out a sol-gel reaction to obtain silica sol; the preparation method comprises the following steps: in an air environment, throwing silica sol into water under stirring to form microspheres, injecting inorganic acid into the water at the same time, then injecting a sodium silicate diluent for reaction, and then adjusting the pH value of the system to 6-7; and aging, washing, drying and roasting to obtain the silicon dioxide microspheres. The preparation method comprises the following steps: mixing a sodium silicate diluent and an organic acid aqueous solution by an acid mixing method, granulating by air to form microspheres, and finally injecting inorganic acid to quickly remove heat, reduce pressure drop and maintain the state of the microspheres, thereby obtaining the stable silicon dioxide microspheres. The porous silicon dioxide microsphere with larger surface area and pore volume is obtained, has better catalytic performance when being used as a catalytic oxidation carrier, and has the advantages of high conversion rate and high stability.

The invention relates to the technical field of bamboo pulp bleaching, and particularly discloses a method for preparing all-chlorine-free bleached bamboo pulp and application. The method adopts a three-section enhanced bleaching process and comprises the following steps: firstly, decomposing lignin under an alkaline condition of 100-115 DEG C through oxygen delignification (Op section); removing transition metal ions by using sulfuric acid and a metal chelating agent with a specific structure by adopting acid pickling chelation (AQ section); and finally, deeply oxidizing the residual lignin in a high-pressure oxygen environment through oxygen enhanced bleaching (Po section). In each stage, hydrogen peroxide is used as a main bleaching agent, sodium hydroxide, sodium silicate and other assistants are matched, and ineffective decomposition of hydrogen peroxide is effectively inhibited through staged pH regulation and a metal chelation technology. The whiteness of the obtained bamboo pulp is larger than or equal to 83% ISO, the kappa number is smaller than or equal to 3.0, and the requirements of high-grade paper products are completely met.

The invention relates to a nickel-free hole sealing agent and a preparation method thereof, and belongs to the technical field of high polymer materials. The nickel-free hole sealing agent comprises the following components in parts by weight: 3-10 parts of cobalt acetate, 1-11 parts of a corrosion-resistant modifier, 1-6 parts of ethylenediamine tetraacetic acid, 3-7 parts of sodium silicate and 5-15 parts of deionized water, an intermediate product containing bis-imidazoline in the corrosion-resistant modifier is tightly adsorbed on the metal surface by virtue of electrostatic attraction and a large pi bond to form a tough protective film, so that a water-phase corrosive medium is effectively isolated, the corrosion speed is remarkably reduced, and meanwhile, the corrosion-resistant modifier has good heat-resistant stability and still has a corrosion inhibition effect in a high-temperature environment; the glycine enables the nickel-free hole sealing agent to better fill tiny holes in the metal surface, so that the surface is flat and smooth, and uniform distribution and permeation of the hole sealing agent are promoted; quaternary ammonium salt destroys cell walls and cell membranes of microorganisms and inhibits growth and reproduction of the microorganisms; the nickel-free hole sealing agent prepared by the invention not only has a good antistatic effect, but also has excellent high-temperature-resistant and antibacterial effects.

The invention relates to the technical field of fluorite ore beneficiation, discloses a fluorite ore flotation composite collecting agent and a preparation method and application thereof, and aims to solve the problems that an existing collecting agent is limited in applicability, insufficient in selectivity, poor in environmental stability and the like and is difficult to deal with separation of fluorite ore containing various impurities or under complex working conditions. The composite collecting agent is composed of dehydroabietylamine, sodium oleoyl sarcosinate, sodium silicate-citric acid composite salt, ethylene glycol butyl ether and a sodium carbonate-sodium bicarbonate buffer pair, all the components have a synergistic effect, dehydroabietylamine provides selective collecting and fine particle agglomeration functions, sodium oleoyl sarcosinate enhances adsorption stability, the composite salt inhibits gangue in a targeted mode, and therefore the adsorption efficiency is improved. Buffer pairs and ethylene glycol butyl ether guarantee the environmental adaptability of a system. The collecting agent can adapt to various fluorite ores with high sulfur, high silicon, low temperature and the like, can stably play a role under different water quality and working conditions, realizes efficient separation of fluorite and impurities, improves the separation efficiency and the concentrate quality, and is flexible in preparation process and convenient for industrial application.

The invention discloses a high-salt-resistance composite cleanup additive and a preparation method thereof, and relates to the technical field of oilfield chemical additives. The invention discloses a high-salt-resistance composite discharge aiding agent. The cleaning agent is prepared from the following raw materials in parts by weight: 10 to 20 parts of modified sodium dodecyl benzene sulfonate, 5 to 10 parts of cocamidopropyl betaine, 8 to 15 parts of polyoxyethylene ether, 2 to 5 parts of nano silicon dioxide, 3 to 8 parts of sodium hexametaphosphate, 1 to 3 parts of low-molecular-weight polyacrylamide, 4 to 10 parts of modified polyacrylic acid-acrylamide copolymer, 15 to 30 parts of ethanol and 5 to 12 parts of ethylene glycol butyl ether. 2-6 parts of an imidazoline derivative, 3-7 parts of amino trimethylene phosphonic acid, 4-9 parts of sodium silicate and 2-5 parts of citric acid-sodium citrate. Aiming at development requirements of high-salt oil reservoirs, sodium dodecyl benzene sulfonate and the polyacrylic acid-acrylamide copolymer are modified, and raw materials are scientifically compounded, so that the cleanup additive shows high stability in a high-salt environment, can reduce interfacial tension and effectively regulate and control rock surface wettability, has foam stability and biodegradability, and can be widely applied to high-salt oil reservoirs. The method is suitable for high-salt complex oil reservoir operation scenes.

The invention discloses a method for recovering high-quality germanium concentrate from scrapped glass optical fibers, and belongs to the technical field of rare metal recovery. Crushing and screening the scrapped glass optical fiber to obtain optical fiber powder; the optical fiber powder and NaOH or Na2CO3 are uniformly mixed, the molar ratio of NaSi to NaGe of the mixture is (3-6): 1, and roasting is conducted for 2-4 h at the temperature of 500-800 DEG C; mixing the roasted material with water according to a solid-to-liquid ratio of 1: (4-10), heating to 50-100 DEG C, stirring and dissolving to generate a leaching solution; after filtering, feeding the filtered clear liquid into a spraying device filled with adsorption resin from an inlet of the device at the temperature of 5-40 DEG C and the flow speed of 5-50mm / min; and feeding an inorganic acid desorption agent into a spraying device from an outlet of the device at the temperature of 50-80 DEG C and the flow speed of 10-100mm / min, collecting the desorbed liquid, and adding water which is 3-5 times of the theoretical hydrolysis amount to obtain the germanium concentrate. The method is simple in technological process, low in energy consumption and high in metal direct recovery rate, the germanium mass content of the enriched germanium concentrate is larger than 40%, the germanium recovery rate is larger than 92%, the main component obtained after germanium recovery is sodium silicate, and multiple benefits of resources, economy, environment and the like are achieved.

The invention relates to the technical field of industrial solid waste resource utilization, and particularly discloses a fluorine-containing silicon slag recycling process which comprises five steps of fluorine-containing silicon slag raw material pretreatment, acid leaching fluorine extraction, ammonium fluosilicate preparation, nanometer silica gel purification and wastewater recycling. Fluorine in the fluorine-containing silicon slag is converted into ammonium fluosilicate solid to be recycled, fluorine in the fluorine-containing silicon slag is converted into sodium silicate to be manufactured into nano silica gel to be recycled, only feeding reaction is needed in the whole process, then filtering is conducted, the technological process is simple, and the treatment efficiency of the fluorine-containing silicon slag is improved. 0.3 ton of ammonium fluosilicate (the market price is 8000 yuan / ton) and 0.2 ton of nano silica gel (the market price is 15000 yuan / ton) can be produced from each ton of fluorine-containing silicon slag, and huge economic value can be brought to factories.

The present invention relates to a preparation method of a self-propagating anti-corrosion and wear-resistant coating for a boiler water wall, belonging to the technical field of high-temperature protective coatings. The preparation steps are as follows: (1) Aluminum powder, iron(III) oxide powder, chromium oxide powder, zirconia fine powder, alumina fiber, heat-conducting filler and flux are ball-milled and mixed to obtain a mixed powder; (2) The mixed powder and sodium silicate binder are mixed evenly to obtain a suspension slurry; (3) The surface of the boiler water wall is treated by sandblasting; (4) A precoating is made on the surface of the boiler water wall; (5) A sodium silicate layer is made on the precoating; (6) A magnesium strip is ignited to initiate a self-propagating reaction to obtain a protective layer; (7) The protective layer is removed to obtain a self-propagating anti-corrosion and wear-resistant coating on the surface of the boiler water wall. The sodium silicate used as the binder obtains a dense self-propagating anti-corrosion and wear-resistant coating, and the self-propagating anti-corrosion and wear-resistant coating has good thermal conductivity, uniform thickness, excellent mechanical wear resistance and good corrosion resistance.

The invention discloses low-carbon red-mud-based alkali-activated foam concrete and a preparation method thereof, and belongs to the field of low-carbon foam concrete. Specifically, the mix proportion and the preparation method of the low-carbon red-mud-based alkali-activated foam concrete are as follows: P.O42.5 ordinary Portland cement provided by building materials in Qingdao Weidong macro, the I-grade fly ash is S95-grade granulated blast-furnace slag produced by Henan Province Platinon Casting Material Co., Ltd., and Jinshu New Material Co., Ltd., the I-grade fly ash is S95-grade granulated blast-furnace slag produced by Henan Province Platinon Casting Material Co., Ltd. The Bayer process red mud powder is produced by Hebei Province Shihozhuangfei Mine Product Co., Ltd. The exciting agent is selected from an industrial liquid sodium silicate solution produced by Henan Jinmoistening New Material Co., Ltd. And solid sodium hydroxide particles with AR analytical purity of 96%; the admixture is selected from a TR-26C type polycarboxylate superplasticizer produced by Henan Fuhua Information Science and Technology Co., Ltd. And the foaming agent is a TR-E type animal protein foaming agent produced by Henan Zhuichun Information Science and Technology Co., Ltd. Compared with existing foam concrete, the low-carbon alkali-activated foam concrete provided by the invention uses a large amount of industrial solid waste, reduces the use cost, reduces the use amount of cement under the condition of ensuring the compressive strength, and is simple and convenient to operate, reasonable in process, low-carbon, environment-friendly, rapid in cement setting and hardening, and suitable for large-scale use.

The invention discloses a wear-resistant high-gloss nano liquid, a wear-resistant high-gloss ceramic tile and a preparation method of the wear-resistant high-gloss ceramic tile, and belongs to the technical field of ceramic manufacturing. The wear-resistant high-gloss nano liquid at least comprises a component A, a component B and a component C which are independently subpackaged, wherein the component A comprises large-particle silica sol, boric acid, sodium methyl silicate, carboxymethyl cellulose sodium, a boronizing stabilizer and the balance of water; the component B comprises a boronizing stabilizer and the balance of water-based modified silicone oil; and the component C is wax emulsion. Through systematic material and process innovation, the ceramic tile which is high in gloss, strong in antifouling property, durable in wear resistance and high in transportation performance is prepared, and the market requirements of surface treatment materials which are high in performance, low in cost and easy to transport are met.

The invention belongs to the field of cement concrete, and particularly relates to an integrated cementing material special for ultra-high performance concrete and a preparation method of the integrated cementing material. The integrated cementing material comprises fly ash, slag powder, carbide slag, semi-hydrated gypsum, silica fume, a powder reinforcing agent, calcium nitrate and sodium silicate. The production process of the integrated cementing material comprises the following steps: winnowing ultrafine microbeads from fly ash, grinding solid waste powder by a fluidized bed type jet mill, chemically strengthening the powder reinforcing agent, chemically nucleating calcium nitrate and sodium silicate, and mixing the integrated cementing material. The ultra-high performance concrete cementing material is prepared from a high-activity solid waste material, the viscosity of a mixture is reduced by winnowing ultrafine micro-beads, the strength of the cementing material is improved by synergistic reaction of slag powder, carbide slag and semi-hydrated gypsum, and a C-S-H crystal nucleus is formed by chemical reaction of calcium nitrate and sodium silicate to provide active sites, so that the cementing material is prepared. And the cementing material is prepared by combining powder chemical dispersion and integrated mixing, so that the carbon emission and production difficulty of the ultra-high performance concrete are remarkably reduced.

The invention provides a multi-scale super-amphiphobic anti-wax coating and a preparation method thereof.The preparation method comprises the following steps that S1, cellulose nanofibers are added into an ethyl alcohol-water mixed solution, after ultrasonic treatment and uniform stirring are conducted, sodium methyl silicate is added for stirring reaction, then fluorosilane and tetraethoxysilane are added for hydrolytic condensation reaction, and a mixed solution is obtained; centrifuging and drying to obtain multi-scale fluorinated micro-nano particles; and S2, mixing the multi-scale fluorinated micro-nano particles, an adhesive and a diluent in proportion, performing ultrasonic stirring, spraying the mixture on a base material, and curing to obtain the multi-scale amphiphobic paraffin-proof coating. Hydrophobic modification is carried out on cellulose nanofibers by using fluorosilane, sodium methyl silicate and tetraethoxysilane to form a multi-scale micro-nano multilevel structure, and the structure can effectively capture air and is combined with ground surface energy, so that the coating has excellent super-amphiphobic performance.

The invention belongs to the field of underground engineering grouting material research, development and application, and provides a diffusion boundary controllable grouting material for underwater accumulation reinforcement and a preparation method thereof, the diffusion boundary controllable grouting material comprises the following raw materials by weight: 800-1000 parts of a material matrix component, 0-25 parts of a comprehensive admixture, 0-200 parts of instant sodium silicate, and 600-800 parts of water. The comprehensive admixture comprises an anti-dispersing agent and a water reducing agent; the anti-dispersing agent is mainly prepared from the following raw materials in parts by weight: 7 to 8 parts of high polymer, 9 to 10 parts of modified cellulose ether, 1 to 3 parts of natural polysaccharide and 1 to 2 parts of synthetic copolymer. The material has the advantages of being good in underwater dispersion resistance, controllable in setting time and easy to accumulate, and filling of an underwater goaf is facilitated.

The invention belongs to the technical field of textile pretreatment processes, and particularly discloses a low-temperature washing-free short-process pretreatment process which comprises the following steps: (1) padding a fabric in a working solution, and stirring for 10-12 hours at 20-25 DEG C. The working solution comprises the following raw materials: a scouring agent, an alkali-resistant penetrant OEP-70, hydrogen peroxide, sodium silicate, ethylenediamine tetra (methylene phosphonic acid) pentasodium salt, caustic soda and water; (2) adding a water-free washing agent into the fabric subjected to padding treatment, and heating for 10-15 minutes at the temperature of 98-100 DEG C; (3) carrying out deoxidization treatment on the treated fabric; (4) immersing the treated fabric into the complex liquid, and stirring for 20-25 minutes at the temperature of 40-45 DEG C; the composite liquid is prepared from sodium dodecyl sulfate, modified chitosan, carboxymethyl cellulose, modified plant ash, polyethylene glycol and water. The fabric treated by the method is low in water consumption and high in dyeing efficiency and dye uptake, and the quality of the fabric is improved.

The invention belongs to the technical field of wastewater treatment, and provides a method for removing and recovering manganese from acid mine wastewater. The method comprises the steps that the acid mine wastewater is subjected to iron removal treatment to obtain iron removal supernate, a manganese removal agent is added into the iron removal supernate to obtain manganese precipitation residues and manganese removal supernate, the manganese precipitation residues and sulfuric acid are mixed to obtain leaching liquid and leaching residues, and the leaching liquid is electrolyzed to obtain metal manganese; the manganese removal agent is sodium silicate and / or sodium metasilicate. According to the method, the added manganese removal agent does not enable silicate ions and manganese ions to generate manganese silicate, but enables the silicate ions to generate a hydrated calcium silicate adsorbent or a porous magnesium silicate adsorbent in situ with calcium and magnesium ions by using the calcium and magnesium ions existing in the acid mine wastewater, so that the recovery and removal of manganese are realized; the method disclosed by the invention is simple and low in cost, and not only realizes recovery of manganese resources, but also realizes deep treatment of residual manganese; and the leaching residues generated in the manganese recovery stage can also be used for deeply treating the manganese-removed supernate, so that the generation of waste residues is reduced.

The invention discloses an iron-based layered silicate material for efficiently removing variable-valence heavy metals and water treatment application of the iron-based layered silicate material, and belongs to the technical field of water treatment.The preparation method of iron-containing layered silicate minerals comprises the following steps that ferrous sulfate heptahydrate is dissolved in water, sodium dithionite and sodium orthosilicate are sequentially added, stirring is conducted, and a mixture is obtained; stirring, homogenizing and aging for two hours; the hydrothermal reaction kettle is used for reacting in a high-temperature and high-pressure environment; according to the iron-containing layered silicate mineral material, a unique layered structure similar to natural iron-containing layered silicate minerals and high adsorption performance are reserved, variable-valence heavy metal arsenic in a wastewater solution is synergistically and efficiently removed by means of the oxidation-reduction activity of the iron-containing layered silicate mineral material and induction of generation of Fenton-like reaction, and the iron-containing layered silicate mineral material is obtained. The method disclosed by the invention shows high treatment efficiency, environmental friendliness and remarkable economic benefits, and is expected to exert remarkable environmental benefits in the field of water treatment.

The invention relates to a preparation method for improving the bulkiness of cloud wool fibers, and relates to the technical field of fiber material preparation, and the preparation method comprises the following steps: preparing primary gel; preparing secondary cross-linked gel through step-by-step cross-linking of sodium silicate and a covalent organic framework material; preparing a fiber template by electrostatic spinning, placing the secondary cross-linked gel on the fiber template, and pressurizing to obtain a gel template complex; immersing the fiber template complex into a 1, 3, 5-triformyl benzene solution, and heating for reaction to obtain a semi-finished product; carrying out gradient solvent replacement on the semi-finished product, and carrying out modification treatment by using a hexadecyltrimethoxysilane solution to obtain a modified semi-finished product; and drying the modified semi-finished product at normal pressure by adopting gradient heating to obtain the aerogel cloud wool fiber. The method has the effects of improving the bulkiness and the heat insulation and heat preservation performance of the cloud wool fiber, the fiber density is low, and the lightweight property is good.

The invention provides a preparation method of a negative electrode material, the negative electrode material, a negative electrode plate and a battery, and the preparation method comprises the following steps: S1, mixing biomass or a biomass derivative as a hard carbon precursor with sodium silicate, acrylamide, an initiator and a cross-linking agent in a solvent, uniformly stirring, and carrying out a free radical polymerization reaction under a photocatalytic condition to obtain a mixed solution; the first precursor is obtained; s2, the first precursor is soaked in a water-soluble calcium salt solution for a hybrid cross-linking reaction, then acidification is conducted, a second precursor is obtained, and a third precursor of a double-network cross-linked structure is obtained after drying, smashing and sieving; and S3, carbonizing the third precursor in an inert atmosphere, and cooling to obtain the hard carbon negative electrode material, at least solving the technical problems of enhancing the sodium ion adsorption capacity, improving the voltage platform capacity, further improving the electrochemical conversion efficiency and reasonably controlling the cost.

The invention relates to the technical field of ceramic materials, in particular to a preparation method of a diatomite-based porous ceramic material and application of the diatomite-based porous ceramic material in wastewater pollutant treatment. The preparation method of the diatomite-based porous ceramic material comprises the following steps: mixing a basic raw material, a sintering aid, a pore forming agent and a binder, performing compression molding to obtain a green body, and sintering the green body, the basic raw materials comprise 80-85% of diatomite, 5-10% of kaolin, 0-5% of feldspar and 5-10% of sodium silicate; the mass of the sintering aid is 5% higher than that of the basic raw material; the mass of the pore-forming agent is 25-45% of that of the basic raw material, and the pore-forming agent is selected from one or more than two of crystalline flake graphite, polymethyl methacrylate and spherical graphite. By controlling the composition and dosage of the basic raw materials, the sintering aid and the pore-forming agent, a micro-nano hierarchical pore structure is formed, mechanical properties and permeability are improved at the same time, and good filtration and interception performance on pollutants in wastewater is achieved.