46 results about "Sodium fluosilicate" patented technology

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 belongs to the technical field of industrial wastewater treatment and resource recovery, and particularly relates to an enhanced treatment method for recovering fluorine resources in semiconductor processing fluorine-containing wastewater. And step-by-step efficient recovery of sodium fluosilicate and calcium fluoride is realized through cooperation of precipitant compounding and pH regulation. The method comprises the following steps: firstly, adding a NaCl-NaHCO3 composite precipitator and sodium fluosilicate seed crystals to induce crystallization and recover hexagonal prism-shaped sodium fluosilicate single crystals; and after filtering, adding a CaCl2-Ca (OH) 2 composite precipitator and calcium fluoride seed crystals into the filtrate to generate large-particle calcium fluoride. And the impurity content in the recovered product respectively reaches the industrial sodium fluosilicate superior product standard and the metallurgical grade calcium fluoride secondary product standard. And the treated wastewater is neutral or weakly alkaline, so that the subsequent mixed treatment with other wastewater is facilitated.

The invention relates to the technical field of copper oxide beneficiation, in particular to a surface altered copper oxide ore flotation composite regulator and application and recovery methods thereof. The composite regulator is composed of sodium pyrophosphite, PAC, sulfonated tannin, sodium lignin sulfonate and sodium fluosilicate; the weight ratio of the sodium pyrophosphite to the PAC to the sulfonated tannin to the sodium lignin sulfonate to the sodium fluosilicate is (5-10): (1-3): (5-10): (15-20): (5-10); under the action of targeting of a composite regulator and surface active points of alkaline earth metal minerals and aluminosilicate minerals, the slime is selectively dispersed, gangue minerals are inhibited, attachment of the slime to the surfaces of the copper minerals is eliminated, and interference of the slime to the action of the copper minerals and agents and flotation is reduced; the recovery method is stable and reliable, the copper recovery rate is high, the cost is low, the process is easy to control, and the technical problem that surface altered copper oxide ore beneficiation and recovery are difficult is solved.

The utility model discloses a sodium fluosilicate sewage treatment system, which is characterized in that sodium fluosilicate wastewater is subjected to fluorine removal and phosphorus removal, then sodium carbonate or sodium hydroxide is added, SO4 < 2-> in the wastewater is converted into a sodium sulfate solution, the wastewater is subjected to hardness removal treatment, then is subjected to ultrafiltration and nanofiltration membrane filtration, concentrated water containing the sodium sulfate solution is recovered to a sodium sulfate collection tank, and the sodium fluosilicate sewage is obtained. Produced water is recycled as replenishing water of the device, so that zero discharge of sewage can be realized.

The invention relates to the technical field of geopolymer concrete preparation, in particular to a geopolymer concrete material based on tailings and a preparation method. The geopolymer concrete material based on tailings is prepared from 40 to 60 parts of modified tailings, 20 to 30 parts of modified slag, 10 to 20 parts of activated metakaolin, 5 to 12 parts of quartz sand and a composite exciting agent solution, wherein the liquid-solid ratio of the composite exciting agent solution is 0.3 to 0.4; the preparation method of the composite exciting agent comprises the following steps that sodium fluosilicate, aluminum ammonium sulfate and sodium sesquicarbonate are dissolved in water according to the mass ratio of 3: 2: 1, a mixed solution is obtained and left to stand for 30 min, the composite exciting agent is obtained, and the mass ratio of water to sodium fluosilicate is (20-40): 1. According to the geopolymer concrete material based on the tailings and the preparation method, the problems that in the prior art, the energy consumption of a tailings treatment process is high, and a traditional high-alkali activator easily causes alkali-aggregate reaction are solved.

The invention discloses a colorless medium borosilicate medicinal glass tube and a preparation method thereof, and belongs to the technical field of glass products. The medicinal glass tube comprises the following raw materials in parts by weight: 550-650 parts of quartz sand, 60-70 parts of aluminum hydroxide, 100-250 parts of borax pentahydrate, 5-15 parts of sodium nitrate, 15-30 parts of sodium carbonate, 1-5 parts of sodium fluosilicate, 10-15 parts of calcite, 5-10 parts of barium carbonate, 5-10 parts of potassium carbonate, 10-20 parts of a compound clarifying agent and 400-500 parts of medium borosilicate glass slag. The quartz sand and the borax pentahydrate in a high proportion provide a basis for the high borosilicate glass, the chemical stability of the glass is remarkably improved, the glass can resist acid and alkali erosion and is very suitable for storing various medicines, and in addition, substances such as aluminum hydroxide, calcite, sodium nitrate, sodium carbonate and sodium fluosilicate are added, so that the thermal stability and the mechanical property of a glass product are improved.

The invention relates to the technical field of microcrystalline plates, in particular to an industrial microcrystalline plate manufactured from graphite tailings and a manufacturing method, the industrial microcrystalline plate is prepared from the following raw material components in percentage by mass: 62-70% of graphite tailings, 6-10% of quartz sand, 6.0-7.0% of sodium carbonate, 5-7% of limestone, 2-2.8% of dolomite, 3-4% of sodium fluosilicate, 1.5-2% of sodium nitrate and 0.1-0.2% of cerium oxide. By analyzing the components of the graphite tailings and adopting a specific formula combination, the graphite tailings are manufactured into the microcrystalline plate with excellent industrial wear resistance and corrosion resistance, so that the problems that the microcrystalline plate manufactured by the existing formula is poor in wear resistance and poor in corrosion resistance are solved. The wear-resistant lining is not applicable to gangue bins, coal storage bunkers, dumper rooms and coal preparation plant equipment in the coal industry.

The present application belongs to the technical field of wastewater treatment, and specifically discloses a method for removing fluorine and COD from copper smelting process wastewater after sulfuration, which comprises the following steps: first, calculating the amount of potassium permanganate required for the reaction of fluorine and sodium silicate in the copper smelting process wastewater after sulfuration; then, adding the potassium permanganate into the copper smelting process wastewater after sulfuration for heating and stirring to obtain a mixed solution; then, adding a coagulant into the mixed solution for mixing and stirring to obtain a flocculation solution; finally, filtering the flocculation solution to obtain a precipitate containing nickel and a purified solution. The introduction of potassium permanganate promotes the transformation of sodium silicofluoride, and the fluorine-containing compounds are removed from the system in the form of precipitation. The newly generated sodium permanganate can effectively degrade the COD in the wastewater, improve the fluorine removal efficiency and depth, and also help to degrade the COD to a certain extent, thereby reducing the wastewater treatment cost.

The application discloses a combined depressor for recovering scheelite from ultra-low-grade tungsten-molybdenum associated ore and a method, the combined depressor comprising sodium humate, sodium mercaptoacetate, ammonium citrate, sodium pyrophosphate, sodium fluosilicate and lead nitrate, and the six kinds of substances are configured into the combined depressor in a proportion of 1:1:(2-5):(1-5):(1-3):(2-5). The application aims at recovering scheelite from low-grade refractory ore, improves the separation effect of scheelite and gangue minerals, improves the scheelite recovery rate and the concentrate grade, and improves the economic benefit.

The invention discloses a novel environment-friendly temperature-resistant fireproof coating and a preparation method thereof.The fireproof coating is prepared from, by weight, 10-13 parts of silicon carbide, 23-27 parts of silicate, 8-12 parts of kieselguhr, 6-8 parts of kaolinite, 10-12 parts of aluminum oxide, 6-9 parts of ceramic micro powder, 20-25 parts of sodium fluosilicate, 20-22 parts of acrylic emulsion and 15-18 parts of organic silicon resin. And 10-13 parts by weight of sodium zirconate and the like. The preparation method comprises the following steps: mixing silicon carbide, silicate, diatomite, kaolinite, aluminum oxide and ceramic micro powder to obtain mixed powder; mixing sodium fluosilicate, an acrylic emulsion, organic silicon resin, sodium zirconate, a diluent, a stabilizer, a suspending agent, an adhesive agent and a rust dissolving agent to obtain a mixed material liquid; during use, the mixed powder and the mixed material liquid are uniformly mixed. The technical problems that an existing fireproof coating is poor in high temperature resistance, short in continuous temperature resistance time and the like can be solved.

The invention discloses an inhibitor for flotation of complex associated fluorite as well as a preparation method and application of the inhibitor. The inhibitor for the flotation of the complex associated fluorite is characterized by being prepared from the following components in percentage by mass: 30-60% of a calcium inhibitor; 30-60% of a silicon inhibitor; 10%-20% of a synergist; wherein the calcium inhibitor is selected from one or more of organic phosphoric acid compounds and polycarboxylic acid compounds; the silicon inhibitor is selected from one or more of water glass, sodium hexametaphosphate and sodium fluosilicate; the synergist is selected from aluminum salt. The silicon-calcium synchronous inhibitor achieves efficient flotation separation under the low-alkali roughing condition, has the advantages of being simple in process, low in energy consumption, stable in production index and the like, and is suitable for industrial production.

The invention relates to the technical field of industrial wastewater resourceful treatment, and provides a glass thinning etching waste liquid and waste residue resourceful method which comprises the following steps: treating glass thinning etching waste liquid by adopting a sodium chloride precipitation method to obtain first filter residue and first filtrate; neutralizing the glass thinning etching waste residues with ammonia water to obtain second filter residues and second filtrate; adding the second filter residue into the first filtrate, adding a part of the second filtrate, and stirring for reaction to obtain a third filter residue and a third filtrate; adding sodium fluosilicate seed crystals and sodium chloride into the third filtrate, and reacting to obtain fourth filter residues and fourth filtrate; lime is added into the fourth filtrate to adjust the pH value to be 11 or above, meanwhile, a modified flocculant accounting for 1-5% of the mass of the fourth filtrate is added, and a fifth filter residue and a fifth filtrate are obtained through a reaction; synergistic recycling of the glass thinning etching waste liquid and waste residues can be achieved, and particularly step-by-step recycling of the glass thinning etching waste residues can be achieved.

A preparation method of a new type of environment-friendly natural latex product. The method comprises the following steps: S1, preparation of a sodium salt solution of shellac resin; S2, adding potassium pyrophosphate, potassium oleate, potassium ricinoleate and sulfur dispersion into natural latex, and stirring and aging to obtain a mixture A; S3, adding calcium salt aggregates of shellac resin and a rubber deodorant into the mixture A, stirring uniformly, immediately transferring the mixed glue liquid into a foaming machine to perform foaming, injecting zinc oxide dispersion and sodium fluosilicate dispersion during the foaming process, and injecting the foamed latex mixture into a pillow mold to enter a steaming oven for vulcanization; and S4, washing and vacuum drying the semi-finished product of the latex product, and completing the production. The method is convenient to process and reliable in environmental protection.

The invention relates to a semiconductor industry ammonium sulfate solid recycling method, which comprises: (1) mixing a sodium-containing ammonium sulfate solid and an ammonium sulfate solution at a temperature of 60-85 DEG C to obtain a saturated ammonium sulfate solution at a temperature of 60-85 DEG C; (2) carrying out cooling crystallization on the saturated ammonium sulfate solution, and carrying out solid-liquid separation to obtain refined ammonium sulfate and a first mother solution; (3) adjusting the pH value of the first mother liquor to be alkaline, and performing heavy metal impurity removal to obtain impurities and second mother liquor; and recycling the second mother liquor according to the sodium content in the second mother liquor. According to the method provided by the invention, a high-purity ammonium sulfate product can be obtained; and the discharge of mother liquor can be reduced, a sodium fluosilicate byproduct can be produced, the utilization rate of resources is improved, and the economic requirement and the environmental protection requirement are both considered.

The invention belongs to the technical field of building material production, and discloses high-performance long-distance pumping concrete and a preparation method thereof. According to the ratio calculated according to the specification, the concrete components are obtained through orthogonal regression calculation. The concrete components comprise 290 to 360 parts of cement, 690 to 730 parts of sand, 1000 to 1050 parts of broken stone, 140 to 210 parts of mineral admixture, 4.3 to 5.5 parts of water reducing agent and 152 to 163 parts of water. A compound admixture prepared from sodium gluconate, cane sugar, sodium hexametaphosphate, boric acid, sodium fluosilicate and glycerol is added into concrete, so that the concrete has excellent flowability, slump retaining property and mechanical property, the long-distance pumping performance is remarkably improved, and the problem of pipe blockage is effectively solved.

The invention relates to a preparation method of a high-strength heat-resistant aluminum alloy wire, and belongs to the technical field of alloy preparation. Cerium nitrate and rubidium nitrate are mixed, ground and dispersed in a graphene oxide solution, then a silane coupling agent is added for treatment, then the rare earth metal modification additive is prepared, rare earth elements in the rare earth metal modification additive can refine crystal grains of the aluminum alloy, and therefore the mechanical property and heat resistance of the aluminum alloy are improved; the refining agent is formed by mixing sodium metaaluminate, sodium fluosilicate and aluminum silicate according to the mass ratio of 1: 1: 1, the refining agent can chemically react with gas and impurities in the aluminum alloy at the high temperature, gas compounds and precipitates are generated, and non-metallic inclusions and tiny metal particles are removed through slagging-off treatment. Meanwhile, the refining agent can refine grains of the aluminum alloy and improve the mechanical property and the processability of the aluminum alloy, so that the electric conductivity and the heat resistance of the aluminum alloy wire are improved.

The invention belongs to the technical field of building materials, and discloses modified potassium magnesium phosphate cement and application thereof. A mixture of carbide slag, fly ash and sodium fluosilicate is used for replacing part of overburnt magnesium oxide to prepare the modified potassium magnesium phosphate cement, the fly ash, the carbide slag and the sodium fluosilicate are mixed according to the mass ratio of 6.5: 3: 0.5, and research shows that the compressive strength of the modified potassium magnesium phosphate cement is firstly increased and then reduced along with the increase of the doping amount of modified raw materials; when the mixing amount is 20%, the compressive strength reaches the maximum, the compressive strength increase in 28 days reaches 22%, and at the moment, the compressive strength is 45.82 MPa. The modified potassium magnesium phosphate cement also shows better water resistance, wherein the compressive strength retention coefficients of two groups of test pieces M1 and M2 under a 7 + 60 d curing system are 0.9443 and 1.0141 respectively. The invention provides the modified potassium magnesium phosphate cement with better performance, and the modified potassium magnesium phosphate cement has important significance in popularization and application of the potassium magnesium phosphate cement.

The invention provides an additive for improving the activity of a concrete mineral admixture, and belongs to the technical field of concrete.The additive is prepared from flue gas desulfurization gypsum, sodium metaaluminate, ferric oxide, calcium hydroxide, sodium methyl silicate, magnesium fluosilicate, sodium fluosilicate, an iron-aluminum bimetallic complex, nano-silica, calcium lignosulphonate and the like as raw materials. The components are compounded according to a specific ratio for use, and the additive prepared by a special preparation method has a very good active synergistic effect, effectively improves the activity of the components such as the fly ash and the slag powder, improves indexes such as material workability and strength, and can support mixing of the components such as the fly ash and the slag powder in a large ratio to prepare a high-performance concrete material.

The invention relates to the technical field of building materials and solid waste resource utilization, and discloses an industrial solid waste synergistic utilization dry-mixed mortar preparation method, which comprises Bayer process red mud, undisturbed phosphogypsum, sodium fluosilicate, light calcined magnesia, ordinary Portland cement, fine aggregate and an additive. The preparation method adopts a unique step-by-step mechanochemical ball milling process: S1, co-grinding the red mud and sodium fluosilicate, etching the surface of the red mud in a targeted manner, and curing free alkali; s2, adding ardealite and light calcined magnesia, continuously grinding, and inducing dephosphorization passivation and lattice reconstruction by utilizing fluorine ion migration to prepare modified composite gelling powder; and S3, mixing with other components. Through chemical regulation and control of a time sequence, the problems of saltpetering of the red mud and delayed coagulation of the ardealite are effectively solved, efficient synergistic utilization of two large solid wastes is realized, and the obtained mortar has excellent mechanical properties, volume stability and water resistance.

The application relates to a system for preparing white carbon black and co-producing sodium fluoride by using sodium fluosilicate as raw material and a use method thereof, relates to the technical field of white carbon black, and particularly relates to a system for preparing white carbon black and co-producing sodium fluoride by using sodium fluosilicate as raw material and a use method thereof. The application successfully solves the disadvantages of high-temperature conditions, high requirements for equipment and high device prices in conventional gas-phase white carbon black production under the premise of outputting high-quality white carbon black, solves the problem that low-cost waste sodium fluosilicate cannot be efficiently utilized in the phosphate fertilizer industry, simultaneously provides a new process route and system for continuous production of white carbon black by using the precipitation method, provides a new optional way for resource utilization of fluorine and silicon, has positive significance and role for improving comprehensive utilization of fluorine and silicon resources, protecting the environment, improving benefits, developing more high-value-added products and promoting the development of fluorine chemical industry.

The invention relates to the technical field of metal preparation, and particularly discloses a preparation process of a GL80 silicon-aluminum alloy. When the silicon-aluminum alloy is prepared, a melting casting technology is adopted, after silicon-aluminum alloy raw materials and silicon powder are remelted for multiple times in the nitrogen atmosphere, a composite modifier is added for modification treatment, refining and impurity removal are conducted after stirring, and finally casting forming is conducted. Wherein the composite alterant is prepared by mixing rare earth salt, sodium fluosilicate, sodium phosphate and aluminum powder, the rare earth salt, the sodium fluosilicate and the sodium phosphate have a synergistic effect, and the advantages of sodium, phosphorus and rare earth elements are combined, so that the refining effect of crystalline silicon is optimal, the internal structure of the alloy is more uniform and compact, and the stability of the material is improved; the comprehensive mechanical property of the alloy material is favorably improved.

A fireproof protection plate for a steel structure is characterized by being prepared from the following raw materials in percentage by mass: 15%-40% of water glass, 40%-60% of modified closed-cell expanded perlite, 5%-15% of kaolin, 5%-10% of expanded vermiculite, 5%-10% of aluminum hydroxide, 10% of reinforced fibers 4 and 2% of a sodium fluosilicate early strength agent 1. The modified closed-cell expanded perlite is prepared by the following steps: (1) preheating and drying; (2) primary puffing; (3) cooling the preliminarily-expanded expanded perlite to normal temperature, spraying a certain amount of water glass solution on the surface of the expanded perlite, then spraying an aluminum sulfate solution, and continuously stirring for a period of time; and (4) carrying out secondary puffing to obtain the closed-cell expanded perlite.

The invention relates to the technical field of magnesium alloy surface treatment, in particular to a treatment process for a magnesium alloy surface composite ceramic film layer, a corresponding magnesium alloy and application. The treatment process comprises the following treatment steps that a to-be-treated workpiece is pretreated; preparing a mixed electrolytic solution containing silicon nitride nanoparticles; the workpiece is placed in the mixed electrolytic solution, plasma electrolytic oxidation treatment is carried out with the workpiece as an anode and stainless steel as a cathode, and a composite ceramic film layer is formed on the surface of the workpiece; by forming the composite ceramic layer containing the silicon nitride nanoparticles on the surface of the magnesium alloy workpiece, the friction resistance of the magnesium alloy is improved, under the synergistic effect of sodium fluosilicate in the mixed electrolytic solution, the corrosion resistance of the magnesium alloy is greatly improved, and the application stability of the magnesium alloy in a severe environment is improved.

The application discloses a method for producing high-quality machine-made sandstone by using waste glass, and belongs to the technical field of building materials, and comprises the following steps: (1) crushing waste glass to obtain waste glass powder; (2) adding an alkali solution into the waste glass powder, mixing, stirring and reacting at a temperature of 65-85 DEG C for 3-5 hours to obtain a reaction product; and (3) uniformly mixing machine-made sandstone and sodium fluosilicate, then adding the mixture into the reaction product, continuously stirring, and continuously feeding carbon dioxide gas into the container until the liquid in the container is completely absorbed. The waste glass powder is reacted with the alkali solution to obtain water glass, and the water glass is solidified and coated on the surface of the machine-made sandstone, so that the strength and surface smoothness of the machine-made sandstone are improved. Moreover, the particle size distribution of the waste glass powder is reasonably designed, the graded glass particles with the corner part removed are mixed into the machine-made sand as aggregate, and the overall grading distribution of the mixed machine-made sand is improved.

The invention discloses a vitrification treatment product containing sludge incineration ash and a preparation method and application thereof. The vitrification treatment product is prepared from the following raw materials in parts by weight: 48 to 52 parts of sludge incineration ash, 17 to 21 parts of sludge incineration slag, 8 to 10 parts of saw mud, 11 to 13 parts of sodium carbonate, 1.5 to 2 parts of sodium fluosilicate, 4 to 6 parts of glass powder, 2.5 to 3 parts of sodium nitrate, 0.3 to 0.5 part of barium carbonate and 0.2 to 0.3 part of cerium dioxide. According to the invention, the sludge incineration ash, the sludge incineration slag and the saw mud are used as main raw materials and are compounded with other components, and a vitrification treatment product is formed after electric melting, so that the hazardous and waste sludge incineration ash can be converted into a glass product or used as a highway asphalt pavement aggregate, construction pebbles, gravel, construction sand, a non-metal abrasive for jet cleaning or a building material substitute material; a high-value utilization way of the sludge is developed, and good economic benefits are achieved.

The invention provides a preparation method of high-purity lithium hexafluorophosphate, which comprises the following steps: preparing silicon dioxide aerogel loaded with lithium fluoride crystals by using lithium hydroxide and sodium fluosilicate in a molar ratio of (7-9): 1 as raw materials, and reacting the silicon dioxide aerogel with phosphorus pentafluoride and anhydrous hydrogen fluoride at low temperature to obtain the high-purity lithium hexafluorophosphate. The purity of the lithium hexafluorophosphate crystal obtained through the method reaches 99.9% or above, the yield reaches 90% or above, and the lithium hexafluorophosphate crystal has the advantages of being high in yield and purity and low in cost and is beneficial to industrial production.

The utility model relates to the technical field of production equipment, and particularly discloses sodium fluosilicate drying equipment which comprises an outer tank body and a drying tank arranged in the outer tank body, the outer tank body and the drying tank are both spherical, a cavity is formed between the outer tank body and the drying tank, and a discharging opening penetrating through the bottom of the outer tank body is formed in the bottom end of the drying tank. A feed port penetrating through the top of the outer tank body is formed in the top end of the drying tank, and the discharge port and the sphere center of the drying tank are coaxially arranged. Wet sodium fluosilicate materials are poured into the drying tank through the feeding port to be dried, after drying is completed, the discharging port is opened, the drying tank is spherical, the discharging port is located at the lowest position of the bottom end of the drying tank, and the dried materials can be automatically poured out from the discharging port under the action of gravity; and the phenomenon that dried materials stored at the end cannot flow to a discharging opening to be poured out is avoided, and the discharging treatment time and the labor cost are saved.

The invention discloses a marble 3D printing consumable capable of improving strength and a preparation method. The marble 3D printing consumable capable of improving strength comprises the following components in parts by weight: PLA, marble powder, a compatilizer, a nucleating agent, a lubricant, an antioxidant, modified TPU and sodium fluosilicate. Wherein the modified TPU comprises the following components in parts by weight: TPU, sodium silicate and aluminum chloride hexahydrate. Sodium silicate and aluminum chloride hexahydrate are wrapped by TPU, and during actual printing, the TPU is melted by the temperature of a nozzle to release sodium silicate and aluminum chloride hexahydrate, and hardness is enhanced under the combined action of the TPU and water. The artificial marble has the beneficial effects that the strength can be improved while the visual effect of marble can be simulated.

The invention relates to the field of concrete accelerators, and discloses a novel alcohol amine series high-aluminum fluoride-free chloride-free alkali-free accelerator and a preparation process thereof, and the accelerator is composed of the following components by weight: 42-48% of high-aluminum aluminum sulfate; 6%-10% of ferrous sulfate; 3%-4% of N-methyldiethanolamine; 4%-5% of diethanol amine; 0.8%-1.2% of citric acid; 1.5%-2.5% of sodium fluosilicate; 0.1%-0.3% of nano silicon dioxide; 1%-2% of triisopropanolamine; nano aluminum oxide; 0.2% to 0.4%; and the balance of deionized water. The mass content of aluminum oxide in the high-aluminum aluminum sulfate is 17.5%-18.5%. According to the preparation method disclosed by the invention, the accelerator with ultrahigh storage stability, coagulation accelerating effect, excellent mechanical strength and uniform batch height is obtained by virtue of synergistic stabilization of complex alcohol amine and nano silicon dioxide and combination of microwave activation and a two-step process.

The invention relates to a cement-based capillary crystalline waterproof material as well as a preparation method and application thereof. The cement-based permeable crystallization type waterproof material is prepared from 20 to 50 parts of cement, 3 to 8 parts of calcium formate, 2 to 10 parts of sodium methylsilanolate, 1 to 5 parts of sodium fluosilicate, 1 to 3 parts of magnesium lithium silicate, 0.5 to 0.8 part of tartaric acid, 1 to 5 parts of sodium glutamate diacetate, 0.5 to 2 parts of methyl acrylate, 0.1 to 1 part of expanding agent, 0.1 to 0.5 part of sodium bentonite and 0.1 to 0.5 part of polycarboxylate superplasticizer. The cement-based permeable crystallization type waterproof material provided by the invention is internally doped in concrete, has the advantages of low doping amount, high waterproof repairing efficiency and the like, can improve the strength and durability of the concrete, can realize the same service life as the concrete, and achieves the self-repairing purpose of permanent waterproofing.