495 results about "Magnesium silicate" patented technology

The invention relates to the technical field of water treatment, and discloses a modified polyaluminum chloride flocculant and a preparation method thereof.The modified polyaluminum chloride flocculant is prepared from, by weight, 50-65 parts of polyaluminum chloride, 8-12 parts of magnesium silicate, 5-8 parts of carboxymethyl chitosan, 15-25 parts of polyaluminum ferric chloride and 3-5 parts of tea polyphenol; the molar ratio of aluminum ions to iron ions in the modified polyaluminum chloride flocculant is (3-4.5): 1. According to the invention, an inorganic-organic dual-modifier synergistic effect mechanism is adopted to construct a'rigid framework-flexible network 'composite structure, and the structure can significantly improve the adsorption capacity of Pb < 2 + >. Meanwhile, the mechanical property of the flocculating agent is improved, so that the flocculating agent can be applied to a high-turbulence environment.

The invention relates to the technical field of cable coating materials, and particularly discloses a B1-grade cable material as well as a preparation method and application thereof. The cable material provided by the invention comprises matrix resin, a compatilizer, a flame retardant, a lubricant, an antioxidant, a smoke suppression charring agent, nano silicon dioxide and a silane coupling agent, the matrix resin is a mixture of linear low density polyethylene resin, an ethylene-octylene copolymer, metallocene polyethylene and an ethylene-vinyl acetate copolymer; the flame retardant is a mixture of magnesium hydroxide, aluminum hydroxide and hydrotalcite; the smoke suppression charring agent is a mixture of hydrous magnesium silicate and modified montmorillonite; the silane coupling agent is a mixture of vinyl silane and diamino silane. According to the cable material provided by the invention, the specific matrix resin, the flame retardant, the smoke suppression charring agent and the silane coupling agent are combined with auxiliaries such as the compatilizer, the lubricant, the antioxidant and the nano silicon dioxide to serve as raw materials, so that the flame-retardant effect of the B1-grade cable material is greatly improved.

A silicon-carbon composite of the present invention comprises a lithium silicon composite oxide and carbon, wherein the lithium silicon composite oxide includes silicon particles, silicon oxide, magnesium silicate, and a lithium silicon compound. By comprising two or more carbon layers including a first carbon layer and a second carbon layer, the silicon-carbon composite can improve the performance of a secondary battery, such as slurry stability and initial charge / discharge characteristics, when used as a negative electrode active material of the secondary battery. In addition, the first carbon layer and the second carbon layer of the silicon-carbon composite satisfy specific thickness ranges, and thus, the silicon-carbon composite can further improve the performance of a secondary battery, such as capacity, cycle characteristics, and initial charge / discharge characteristics, when used as a negative electrode active material of the secondary battery.

The invention discloses a supported iron-molybdenum catalyst for formaldehyde production and a preparation method and application thereof, and belongs to the field of catalysts.The catalyst comprises a core-shell structure, the core of the catalyst is a carrier, molybdenum trioxide is supported on the carrier, and the shell of the catalyst is iron molybdate. The carrier is selected from at least one of silicon dioxide, aluminum oxide, titanium oxide, magnesium oxide, magnesium silicate, a molecular sieve, white carbon black and hydroxyapatite; the preparation method comprises the following steps: firstly, loading molybdenum trioxide on a carrier, then dispersing the carrier in deionized water, dropwise adding a molybdenum source solution and an iron source solution in a parallel flow manner under stirring to perform deposition loading of iron molybdate, and performing aging, drying, forming and calcining to obtain the catalyst. The catalyst is used for preparing formaldehyde by oxidizing methanol, dimethyl ether and methylal; according to the catalyst disclosed by the invention, the raw material cost and the pollutant treatment capacity are obviously reduced due to the reduction of the dosage of molybdenum and iron components, and the catalyst has relatively good activity and stability.

The invention discloses a modified thermal insulation coating and a preparation method and application thereof, and belongs to the field of building energy-saving materials. One modified compound is a thermo-sensitive polyelectrolyte layer-by-layer self-assembled alumina microsphere formed by alternately depositing polyethyleneimine and polyacrylic acid through electrostatic interaction, and the polyelectrolyte layer can dynamically swell or shrink along with the temperature to adjust the heat conductivity coefficient; and the other is magnesium silicate nanofiber coated with silicon dioxide and then grafted with fluorosilane, the hydrophobicity is improved by utilizing the low surface energy of the fluorosilane, and meanwhile, the binding force with a polymer interface is enhanced. The coating further comprises fumed silica, a dispersing agent, a defoaming agent and other auxiliaries. The preparation method comprises the following steps: sequentially adding the components into a high-speed dispersion machine, mixing, adjusting the viscosity, filtering and packaging. The coating has the advantages of intelligent temperature-sensitive adjustment, low heat conductivity, strong adhesion and weather resistance; the material is suitable for long-acting heat preservation in the fields of buildings, industrial equipment and cold chains.

The invention discloses an aluminum substrate UV matt finish paint and a preparation process thereof, and relates to the technical field of paints.The aluminum substrate UV matt finish paint is prepared from, by mass, 10%-20% of modified polyurethane acrylate, 25%-32% of high-functionality aliphatic polyurethane acrylate, 18%-30% of special modified epoxy acrylate resin, 0.5%-2% of dispersing agent, 0.1%-0.5% of defoaming agent, 1%-3% of anti-settling powder and the balance water. The paint is prepared from the following components in percentage by weight: 10 to 15 percent of magnesium silicate mineral, 1 to 10 percent of matting powder, 0.2 to 1 percent of 1-hydroxycyclohexyl phenyl ketone, 0.5 to 3 percent of trimethylbenzoyl-diphenyl phosphine oxide, 1 to 3 percent of acrylate flatting agent, 0.2 to 1.2 percent of polyurea modified polyurethane rheological agent and 5 to 15 percent of trimethylolpropane triacrylate. According to the UV matte finishing paint disclosed by the invention, through compounding of ternary resin and enhancement of nano silicon dioxide, a rigid and tough cross-linked network is constructed, a paint film is free of cracks when being bent at 180 degrees, the adhesive force reaches grade 0, and a coating is resistant to acid and alkali etching liquid and free of corrosion by cooperating with a silane coupling agent and a light stabilization system, and the color difference is delta Elt after the UV matte finishing paint is subjected to high temperature of 260 DEG C; and 1.5, the anti-yellowing performance is excellent.

The invention relates to a detoxification method for simultaneously removing dioxin and heavy metal in waste incineration fly ash, which comprises the following steps of: pretreating fly ash and simultaneously removing dioxin and heavy metal in fly ash, namely, removing sodium salt and potassium salt in fly ash by adopting an immersion cleaning mode; the method comprises the following steps: pre-treating fly ash to avoid reducing the curing capacity of a sintering product formed by high-temperature sintering of the fly ash on heavy metals, separating the pre-treated fly ash to obtain a solid phase, mixing the solid phase with magnesium salt and / or calcium salt, and carrying out high-temperature roasting, so that chlorine decomposed by dioxin in the fly ash reacts with the heavy metals to form gaseous heavy metal chloride to remove the heavy metals in the fly ash; in the high-temperature roasting process, the magnesium salt and / or the calcium salt and ash in the fly ash form calcium silicate and / or magnesium silicate under high-temperature reaction, so that the curing capacity of crystal lattices in a fly ash sintering product is enhanced. After the waste incineration fly ash is subjected to detoxification treatment by adopting the method, heavy metals Hg, Pb, Cd, Cu and Ni are not detected in the fly ash leachate, so that the leaching risk of the heavy metals remained in the fly ash can be obviously reduced.

The invention provides natural color anodized aluminum alloy powder and a preparation method and application thereof, and belongs to the field of additive manufacturing. The method comprises the following steps: remelting an aluminum-silicon alloy and magnesium silicate to obtain an aluminum-magnesium-silicon alloy; a mixed raw material is prepared from an aluminum-magnesium-silicon alloy, pure magnesium, pure aluminum and an aluminum-zirconium alloy, and is formed based on ultrasonic suspension smelting and rapid cooling; the aluminum alloy powder comprises the following components in percentage by weight: 1.0-5.0% of Zr, 1.0-5.0% of Al, 1.0-5.0% of Zr, and the balance of aluminum. 0.4 to 1.0 wt% of Mg; 0.4 to 1.0 wt% of Si; the balance is Al and inevitable impurities; wherein the weight ratio of Si to Mg is 1: 1. The material can be used for additive manufacturing molded consumer electronics. According to the method disclosed by the invention, on the premise of reducing the types and the dosage of strengthening elements, the aluminum alloy which is uniform in structure, free of obvious segregation, isotropic in mechanical property, free of the problems of pits and layer lines after anodizing and free of color difference is prepared by adopting an ultrasonic suspension smelting and hypersonic inert gas atomization method.

The invention provides a light super-soft fire-resistant flame-retardant optical cable and a preparation method thereof. The light super-soft fire-resistant flame-retardant optical cable sequentially comprises a high-temperature-resistant optical fiber, a filling layer, a flame-retardant loose tube, a reinforcing layer, a heat insulation layer and a fire-resistant flame-retardant layer from inside to outside, the fireproof flame-retardant layer comprises the following preparation raw materials in percentage by mass: 55-65% of plasma activated mineral powder, 25-35% of a thermoplastic elastomer base material subjected to irradiation crosslinking treatment, 8-12% of a phosphorus-nitrogen intumescent flame retardant and 1.5-2.5% of a silane coupling agent; the nano mineral powder comprises a magnesium aluminum silicate compound, and the thermoplastic elastomer matrix comprises a blend of SEBS (Styrene-Ethylene-Butylene-Styrene) and TPU (Thermoplastic Polyurethane). The fire-resistant flame-retardant layer forms a ceramic protection layer at high temperature to perform fire-resistant flame-retardant protection and prevent heat transfer, and meanwhile, the heat insulation layer is matched to further prevent heat from being transferred to the cable core, so that the performance of the optical cable is ensured not to be influenced.

The invention discloses a springback inhibitor for sprayed concrete as well as a preparation method and application of the springback inhibitor. The rebound inhibitor is prepared from the following components in percentage by mass: 2-5% of magnesium aluminum silicate, 19.8-29.8% of silica fume, 1-4% of a macromolecular tackifier, 2-5% of aluminum sulfate slag powder, 38-51% of superfine stone powder, 9-16% of fly ash microspheres, 1-2% of a water reducing agent, 2-3% of redispersible milk powder, 2-5% of inorganic mineral fibers and 0.01-0.2% of modified plant fibers. The springback inhibitor disclosed by the invention has a remarkable effect on reducing the springback rate of the sprayed concrete, and can enhance the water dispersibility resistance of the sprayed concrete and improve the cohesiveness of the sprayed concrete. The preparation method disclosed by the invention is simple in industry and easy for large-scale production.

The invention relates to a high-wear-resistance nano-particle composite polyester fiber spinning oil agent and a preparation method thereof. The oil agent contains 3-7wt% of an anti-wear agent composed of modified nano-hydroxyl magnesium silicate, polyoxypropylene stearate and polymethyl methacrylate; and 45-55 wt% of a smoothing agent composed of pentaerythritol oleate and trimethylolpropane fatty acid ester. The preparation method of the oiling agent comprises the following steps: firstly, weighing the components according to the weight; sequentially adding a smoothing agent, an emulsifying agent, a penetrating agent, a bundling agent, an antistatic agent, an anti-wear agent and an anti-coking agent; and finally, reacting for 1.5-3 hours at the temperature of 40-50 DEG C and at the stirring speed of 500-900 r / min to obtain the high-wear-resistance nano-particle composite polyester fiber spinning oil. The oiling agent has excellent wear resistance and smoothness, the manufacturing process is simple, and the oiling agent can well meet the spinning process of nano-particle composite polyester fibers.

The invention relates to the technical field of microcapsules, provides a magnetic microcapsule capable of preventing particle sedimentation, a preparation method of the magnetic microcapsule and a magnetic film, and aims to solve the problems of low writing smoothness and poor trace durability due to particle sedimentation and aggregation in the prior art. The magnetic microcapsule comprises a wall material and a core material, the wall material is a mixture comprising an anionic polymer and a cationic polymer, and the core material is a mixture comprising magnetic particles, non-magnetic particles, an oily solvent and a suspension stabilizer; the suspension stabilizer comprises any one or more of phthalic ester, polyamide wax, polysiloxane, sorbitan oleate, sorbitan monostearate, silicon dioxide, magnesium aluminum silicate and magnesium lithium silicate; according to the invention, magnetic particles and non-magnetic particles can be prevented from settling and gathering, and writing fluency and trace durability are ensured.

According to the sunscreen composition, the preparation method and the application, the sunscreen index can be increased. The sunscreen composition comprises the following components in percentage by mass: 0.001-65% of an oil-soluble sunscreen agent, 0.1-0.5% of a surfactant, 0.1-0.5% of an antioxidant, 0.1-0.5% of a preservative and the balance of water. The thickening agent is prepared from trihydroxy stearin and disteardimonium hectorite, the mass fraction of the thickening agent is 6 to 10 percent, the mass fraction of the trihydroxy stearin is 3 to 6 percent, and the mass fraction of the disteardimonium hectorite is not less than 1 percent; and oil.

The invention discloses biochar / double-gel composite microbial remediation agent particles which are prepared from biochar powder, basophilic microorganisms, magnesium lithium silicate inorganic gel, sodium alginate hydrogel and calcium salt. Accordingly, a corresponding preparation method is also established, namely, the biochar powder and the basophilic microbial spore culture solution are mixed, compounded with the magnesium lithium silicate inorganic gel and the sodium alginate hydrogel and then crosslinked with the calcium salt solution, and the microspherical microbial remediation agent particles are obtained. The method is easy and convenient to operate, high in cost effectiveness, environmentally friendly and suitable for industrial large-scale production. The obtained repairing agent is good in particle sphericity degree, small in particle strength deviation, good in biocompatibility and long-term stability and good in self-repairing effect on concrete cracks.

The invention discloses an advanced treatment agent for textile printing and dyeing wastewater and a treatment method. The advanced treatment agent comprises a component A and a component B, the component A comprises modified graphene oxide and an enzyme treatment agent; the component B comprises magnesium aluminum silicate, hydroxyapatite, hydroxypropyl methyl cellulose and chitosan, and the hydroxyapatite is coated with the magnesium aluminum silicate to form a core-shell structure. By adopting a modified graphene oxide immobilized enzyme structure, harmful components in water can be effectively adsorbed, so that the effect of greatly improving sewage purification is achieved, and meanwhile, the adsorption effect of the harmful components can be further improved by matching with aluminum-magnesium silicate coated hydroxyapatite, hydroxypropyl methyl cellulose and chitosan; meanwhile, bonding with the modified graphene oxide is beneficial to agglomeration and flocculation of substances, so that the flocculation capacity is improved, and floc separation is facilitated.

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 a low-carbon masonry cementing material as well as a preparation method and application thereof. The low-carbon masonry cementing material is prepared from the following raw materials in parts by weight: 95-100 parts of ceramsite waste residue powder, 1-10 parts of magnesium aluminum silicate slag and 0-4 parts of clinker, the low-carbon masonry cementing material contains a large amount of amorphous active silicon, and under the direct excitation hydration action of the magnesium aluminum silicate slag component, the hydration rate of the low-carbon masonry cementing material is promoted, so that the low-carbon masonry cementing material has the characteristics of improved early and long-term strength, strong durability, high water retention rate and small hydration heat; besides, by adding the clinker, mineral components such as CaO, SiO2 and Al2O3 can be released and promoted to be subjected to a hydration reaction, C-S-H series hydrates and ettringite are generated, and the artificial stone is coagulated and hardened into the hard artificial stone at the normal temperature like cement.

The invention relates to a method for preparing a hydrated magnesium silicate cementing material by using sepiolite, which comprises the following steps: dissolving sepiolite by using strong acid, and separating to obtain a solution and residues; naOH is added into the solution, and Mg (OH) 2 sediment is obtained; and separating the Mg (OH) 2 precipitate, calcining to obtain MgO, mixing a water reducing agent, the residues and the MgO, and adding water for curing to obtain the hydrated magnesium silicate cementing material. Rich sepiolite in the earth crust is used as a main raw material, so that low-cost and large-scale preparation of the hydrated magnesium silicate cementing material is realized.

The invention discloses a method for recovering high-purity fluorine and silicon from fluorine-silicon slag and co-producing a low-alkali fluorine-free accelerator, which comprises the following steps: S1, dissolving the fluorine-silicon slag in a sodium hydroxide solution to obtain a solution A; s2, adding dilute sulphuric acid into the solution A, reacting until gel is obtained, and filtering to obtain filtrate A and high-purity silicon dioxide gel; s3, adding calcium sulfate and EDTA (Ethylene Diamine Tetraacetic Acid) into the filtrate A, stirring and reacting, and filtering after the reaction is finished to obtain calcium fluoride and filtrate B; and S4, taking clear water, heating, carrying out heat preservation, then adding aluminum sulfate, lithium sulfate, diethanol amine and the filtrate B obtained in S3, continuously stirring until the aluminum sulfate is completely dissolved, then adding hydrated magnesium silicate, continuously carrying out heat preservation stirring, and obtaining the low-alkali fluorine-free accelerator after stirring is finished. The method is simple in process and easy to implement industrially, and fluoride and silicon oxide obtained through separation are high in purity and beneficial to follow-up extension application; more importantly, high-value recycling of the fluorosilicon slag is achieved, and the problems of stockpiling waste and environmental pollution of the fluorosilicon slag are solved.

The invention relates to the technical field of repairing materials, and discloses a concrete crack self-repairing material based on microorganism synergistic mineralization and application, the concrete crack self-repairing material comprises a microbial population, the microbial population is composed of basophilic calcium carbonate generating bacteria, urea hydrolytic bacteria and silicate mineralizing bacteria, and the microbial population is used for generating calcium carbonate and calcium silicate minerals in an alkaline environment; repairing concrete cracks; the microcapsules are used for responding to humidity or temperature changes in the crack environment and releasing microbial populations and mineralization activating factors; a mineral carrier comprising bentonite, zeolite or magnesium silicate, for carrying a population of microorganisms and providing an attachment surface; and the repair activation particles can start mineralization reaction when the crack occurs to fill the crack. By increasing the proportion of microbial populations, the survival and activation conditions of microorganisms are optimized, the rate of mineralization reaction is improved, and the acceleration of the crack repair process is realized, so that the effect of remarkably improving the repair speed is achieved.

The invention provides a suspending agent containing cyflumetofen and spirodiclofen and application of the suspending agent. The suspending agent is prepared from the following components in percentage by weight: 10 to 30 percent of cyflumetofen, 10 to 30 percent of spirodiclofen, 1 to 10 percent of wetting dispersant, 0.05 to 0.2 percent of pH regulator, 1 to 7 percent of antifreezing agent, 0.05 to 0.2 percent of xanthan gum, 0.2 to 0.8 percent of magnesium aluminum silicate, 0.05 to 0.2 percent of mildew preventive, 0.05 to 0.2 percent of defoaming agent and the balance of deionized water, wherein the total weight percent of the components is 100 percent. The wetting dispersant is prepared from TERSPERSE 2700 and Atlox4913, and the mass ratio of the TERSPERSE 2700 to the Atlox4913 is (1 to 5) to (1 to 5). According to the suspending agent formula disclosed by the embodiment of the invention, the storage results at different temperatures are relatively good, the particle size increase is relatively small, and the suspension rate is 90% or above. And after heat storage and freeze thawing tests at different temperatures, solidification does not occur after normal-temperature storage, and the storage stability is obviously improved. Field test results show that the 38% cyflumetofen-spirodiclofen SC provided by the invention has a good effect on prevention and treatment of citrus tree red mites, and the stable lasting period is 20-30 days.

The invention belongs to the technical field of biomimetic materials, and discloses a titanium alloy implant surface biomimetic coating and a preparation method thereof.The biomimetic coating comprises a porous titanium support layer, a micron-sized porous titanium layer is prepared through plasma spraying, and then nano-hydroxyapatite is doped to improve osteoinductivity; the graphene enhancement layer is modified, a graphene oxide film is electrochemically deposited, the graphene oxide film and the titanium substrate are covalently bonded through a silane coupling agent, and strontium ions are loaded to promote osteogenic differentiation; an antibacterial active layer and in-situ reduced graphene oxide form a three-dimensional network conductive structure, tantalum-doped carbon nitride quantum dots are loaded through ultrasonic dispersion and embedded between graphene layers to form an antibacterial phase, and then magnesium silicate nanowires are subjected to hydrothermal growth to form a bioactive phase. Through triple bionic design of porous titanium, ion release / photo-thermal response and PDA adhesion, the bone bonding strength, antibacterial property, wear resistance and corrosion resistance of a coating interface are improved.

The invention belongs to the technical field of cement-based material admixtures, and particularly relates to a preparation and performance regulation and control method of a cement expanding agent. The technical problems of large component fluctuation, unstable performance and excessive expansion prevention at present are solved. According to the method, magnesium oxide is treated through low-temperature calcination, surface treatment and nano coating, an auxiliary expansion source high-activity magnesium silicate mineral is introduced, and meanwhile, a bio-based polymer crystal form regulating agent is doped to modify lignosulfonate to regulate the crystallization process of a hydration product, so that the expansion performance is controllable and stable and does not change drastically due to fluctuation of raw materials; excessive expansion is avoided while concrete shrinkage is effectively compensated, and cracking damage of a set cement structure is prevented.

This invention relates to a detoxification method for simultaneously removing dioxins and heavy metals from waste incineration fly ash. The method includes fly ash pretreatment and simultaneous removal of dioxins and heavy metals. First, sodium and potassium salts are removed from the fly ash by immersion washing to avoid reducing the ability of the sintered products formed during high-temperature sintering to solidify heavy metals. Then, the pretreated fly ash is separated to obtain a solid phase, which is mixed with magnesium and / or calcium salts and subjected to high-temperature roasting. This allows the chlorine from the decomposition of dioxins in the fly ash to react with the heavy metals to form gaseous heavy metal chlorides, thus removing the heavy metals from the fly ash. During the high-temperature roasting process, the magnesium and / or calcium salts react with the ash in the fly ash to form calcium silicate and / or magnesium silicate, enhancing the solidification ability of the internal lattice of the fly ash sintered products. After detoxification treatment of waste incineration fly ash using this method, no heavy metals Hg, Pb, Cd, Cu, and Ni were detected in the fly ash leachate, significantly reducing the leaching risk of residual heavy metals in the fly ash.

The present invention relates to a silicon-carbon mixture, a method for preparing same, and a negative electrode active material and a lithium secondary battery comprising same. The silicon-carbon mixture includes two or more kinds of composites, comprises silicon particles, magnesium silicate, and carbon, and has a molar ratio of oxygen (O) atoms to silicon (Si) atoms (O / Si) that satisfies 0.06 to 0.90. Accordingly, when the silicon-carbon mixture is applied to a negative electrode active material, it is possible to simultaneously enhance the discharge capacity, initial efficiency, and capacity retention rate after cycles of a lithium secondary battery.

The present application provides a method for removing impurities from multi-source photovoltaic wastewater and synergistically preparing fluorine products in a cascade manner, which realizes deep removal of fluoride and recovery of fluorine resources through a three-stage treatment system. The primary treatment uses concentrated alkaline wastewater to react with magnesium salts, effectively removes silicates through flocculation and precipitation, and recovers magnesium silicate products. In the secondary treatment, silicon-containing concentrated acid wastewater reacts with barium salts to remove silicate ions and is then mixed with the primary waste liquid. After adjusting to the optimal pH, aluminum salts are added for coagulation and precipitation to recover cryolite. The tertiary treatment uses crystal seeds to induce calcium fluoride crystallization, further reducing the fluoride ion concentration to below 8 mg / L to meet wastewater discharge standards, and at the same time recovering calcium fluoride products; the entire process is simple, low-cost, and the recovered product is of high quality, in line with national standards, and has significant economic and environmental benefits. In addition, the present application realizes "waste treatment with waste", reduces wastewater treatment costs, and meets the requirements of sustainable development.

The invention discloses a flame-ablation-resistant fireproof coating as well as a preparation method and application thereof, and belongs to the technical field of fireproof coatings. The coating comprises 20-60 parts of a film forming matter, 5-25 parts of indirect ceramic forming filler, 10-30 parts of an acid source and 5-15 parts of a gas source, the indirect ceramic forming filler comprises any one or more of feldspar, illite, kaolinite, montmorillonite, calcium silicate and magnesium silicate. The indirect ceramic forming filler is decomposed into a ceramic forming material at high temperature, and at the moment, the fireproof coating expands to form an expansion layer; the ceramic forming material in the expansion layer further reacts under the action of high-temperature flames, especially the ceramic forming material outside the expansion layer facing high temperature, to generate a ceramic substance, so that the surface ceramization of the fireproof coating is controllable, and the ceramization effect of the expansion layer after the coating is fully expanded is achieved; the problem that the fireproof performance is reduced due to the fact that a coating expansion layer forms a hard shell layer too early when the high-temperature-resistant performance of the fireproof coating is improved through a ceramic method is solved.

The invention relates to the field of composite materials, in particular to a low-temperature-resistant polypropylene impact-resistant modified material, a preparation method thereof and an automobile part. The low-temperature-resistant polypropylene impact-resistant modified material provided by the invention is prepared from the following raw materials in parts by mass: 60-98 parts of homo-polypropylene; 5-15 parts of an ethylene-butylene copolymer elastomer; 1 to 10 parts of an SEPS elastomer; 0-30 parts, but not 0 part, of hydrated magnesium silicate; 0.1 to 1 part of a silane coupling agent; 0-8 parts of grafted polyethylene, but not 0 part; 0.1 to 1 part of an antioxidant; and 0.1-1 part of a processing aid. The low-temperature-resistant polypropylene anti-impact modified material provided by the invention can effectively improve the low-temperature-resistant and anti-impact properties, and meanwhile, good tensile property, bending property and high-temperature property are ensured.

Provided is an efficient combined nano iron suspension fertilizer. The suspension fertilizer efficient combined nano iron is prepared from ingredients including, in mass percentage: 10.0% to 20.0% of FeSO4; 0.5% to 2.0% of zero-valent iron nanoparticles (nZVI); 5.0% to 10.0% of magnetic iron oxide nanoparticles (Fe3O4-NPs); 30.0% to 50.0% of citric acid; 1.0% to 5.0% of a dispersant 5040; 0.2% to 1.0% of xanthan gum; 1.0% to 5.0% of magnesium aluminum silicate; and water as a balance.

The invention discloses a low-temperature high-shrinkage PETG shrink film, which adopts a three-layer co-extrusion structure, and comprises a surface layer, a core layer and a bottom layer, the core layer is prepared from a PETG shrink film functional master batch accounting for 90-95 wt% of the total mass and PETG for a common film, and the PETG shrink film functional master batch is prepared from the following raw materials in parts by weight: 100-120 parts of terephthalic acid, 100-120 parts of 1, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, 100-120 parts of 1, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, 100-120 parts of 1, 2, 4-trimethyl-1, 3-pentanediol The invention relates to a high-temperature-resistant polyurethane adhesive which is prepared from the following components in parts by weight: 30 to 50 parts of 1, 4-cyclohexanedimethanol, 80 to 100 parts of ethylene glycol, 0.1 to 0.2 part of triaryl phosphate, 0.01 to 0.03 part of isocyanate, 0.01 to 0.02 part of potassium tripolyphosphate, 0.1 to 0.2 part of magnesium aluminum silicate, 0.2 to 0.4 part of disodium ethylene diamine tetraacetate and 0.3 to 0.5 part of other auxiliaries. The invention also discloses a preparation method of the shrink film. The transverse thermal shrinkage rate of the PETG shrink film with a three-layer structure prepared by taking the functional master batch as a core layer is greater than 70% at 80 DEG C, and when the PETG shrink film is used as a label of an outer package of a product, the PETG shrink film has relatively good shrink packaging performance on special-shaped bottles, common PP bottles and the like, and the packaging bottles are not easy to damage and deform.