109 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 discloses integrated equipment for preparing sodium fluosilicate through photovoltaic wastewater resource utilization, and particularly relates to the field of photovoltaic wastewater, the integrated equipment comprises a filtering unit, a chemical adding unit, a reaction unit, a centrifugal unit and an online detection system, the filtering unit comprises a raw water tank and a precision filter, the raw water tank is connected with the precision filter through a pipeline, and the chemical adding unit is connected with the reaction unit through a pipeline; an online hydrofluoric acid concentration detector is arranged at the water outlet end of the precision filter; the online detection system comprises a fluorine ion detector, a pH meter module and a PLC (Programmable Logic Controller) control unit, and the PLC control unit is used for quantitatively conveying filtered wastewater to a reaction tank in the reaction unit through a water pump according to the detected hydrofluoric acid concentration. According to the equipment, efficient resource utilization of photovoltaic wastewater is realized through precise filtration, dosing and reaction control, and a sodium fluosilicate product is generated.

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 invention discloses a method for resource utilization of clay vanadium-containing shale, and belongs to the field of solid waste resource utilization. Aiming at the situation that the clay vanadium-containing shale cannot be effectively utilized due to the fact that the vanadium grade is low and cannot meet the development and utilization requirements, so that resources are wasted, the vanadium grade in the clay vanadium-containing shale is improved through pre-enrichment, and the method mainly comprises the following process steps: (1) grading without grinding after crushing: crushing the clay vanadium-containing shale to be-(2-4 mm), and crushing the clay vanadium-containing shale to be-(2-4 mm); grinding is not needed, wet screening and grading are carried out with 25-45 [mu] m as the standard, oversize products and undersize products are obtained, and the undersize products are pre-enriched products I; (2) after-grinding three-section full-open-circuit short-process flotation is conducted on oversize products, the oversize products are ground to-74 microns and account for 50%-85%, then three-section full-open-circuit short-process flotation is conducted in the acid environment that the pH of ore pulp ranges from 3 to 4, and flotation concentrate is a pre-enriched product II; the collecting agent is compounded and assembled autonomously, and the novel combined collecting agent comprises the following components in percentage by mass: 50-75% of dodecyl guanidine hydrochloride and 25-50% of isooctyl alcohol. The combined inhibitor comprises the following components in percentage by mass: 30-50% of water glass and 50-70% of sodium fluosilicate.

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 discloses a system for preparing white carbon black and co-producing sodium fluoride by using sodium fluosilicate as a raw material and a use method of the system, and relates to the technical field of white carbon black, in particular to a system for preparing white carbon black and co-producing sodium fluoride by using sodium fluosilicate as a raw material and a use method of the system. On the premise of producing high-quality white carbon black, the method successfully solves the defects of high temperature condition, high equipment requirement and high device price in the conventional fumed silica production, and also solves the problem that the low-cost waste sodium fluosilicate in the phosphate fertilizer industry cannot be efficiently utilized; meanwhile, the invention also provides a new process route and system for continuous production of white carbon black by a precipitation method, provides a new optional way for resource utilization of fluorine and silicon, and has positive significance and effects on improvement of comprehensive utilization of fluorine and silicon resources, environmental protection, benefit improvement, development of more high-added-value products and promotion of fluorine chemical development.

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 utility model relates to the technical field of sodium fluoride purification, in particular to a high-shear dispersion emulsifying machine for sodium fluoride purification, which comprises a purification box and an access cover plate, and an ultrasonic transmitter and a temperature adjusting rod are arranged in the purification box; the maintenance cover plate is connected with an ultrasonic generator and a high-shear dispersion emulsifying machine; the method has the beneficial effects that a set amount of process water and alkali liquor are supplemented into the purification box in advance, solid-phase sodium fluoride is added into the purification box, the solution is subjected to high-speed shearing and stirring at a proper frequency, the temperature of the solution is increased to 80 DEG C, and meanwhile, the solution is oscillated for 30 minutes through ultrasonic waves; the modulus of the solution is reduced, and the content of sodium fluosilicate and silicon dioxide wrapped in sodium fluoride in the solution is reduced; the solution is discharged from the discharging pipe and then is subjected to solid-liquid separation, the liquid phase is used for the front-end process, and the solid-phase sodium fluoride is subjected to water washing, shearing and ultrasonic oscillation again, so that the purification effect of the sodium fluoride is improved, and the quality of the sodium fluoride is improved.

The invention discloses a method for preparing sodium fluosilicate by using copper smelting arsenic-removed waste acid and an aging container, and the method comprises the following steps: S1, filtering the arsenic-removed fluorine-containing waste acid, and then placing the arsenic-removed fluorine-containing waste acid in a reaction tank I to remove solid particles and impurities in the waste acid; s2, adding silicon dioxide, heating, stirring and reacting for 0.5-1 hour, converting fluoride in the waste acid to produce fluosilicic acid, and filtering a reaction product; s3, conveying the generated fluosilicic acid into a reaction tank II, adding a proper amount of sodium sulfate saturated liquid, and preparing sodium fluosilicate; s4, carrying out aging treatment; and S5, washing and drying the generated sodium fluosilicate precipitate to obtain a final product. According to the method, high-purity sodium fluosilicate is prepared from the fluorine-containing waste acid in copper smelting, and fluorine in the waste acid is efficiently removed and recycled, so that pollution to the environment is reduced, and the resource utilization rate is increased.

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 discloses a curing agent based on beach shallow soft foundation soil and preparation equipment of the curing agent, and relates to the technical field of curing. The curing agent comprises allyl polyethylene glycol, potassium zirconium carbonate, a silane coupling agent, potassium monododecyl phosphate, ammonium polyphosphate, calcium stearate, sodium dodecyl sulfate, polyacrylamide, calcium sulfate, sodium fluosilicate, sodium sulfate and a hard viscose emulsion. By arranging a storage tank, a scraping sleeve and an elastic bag, after a reagent is stirred and mixed, a discharge valve is opened, the stirred and mixed reagent in a mixing box is discharged, the telescopic end of an electric telescopic rod pushes a cleaning ring to move downwards, and meanwhile, an air pump sucks clean air, discharges the clean air into an air cavity through a hose and then sprays the clean air out through a spray head; reagents left on the inner wall of the rotating shaft and the inner wall of the mixing box are cleaned, the surface of the rotating plate is cleaned by moving a scraping sleeve, and the reagents left in the equipment can be cleaned, taken out and used.

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.

The invention discloses a novel technology for comprehensive utilization of multiple elements of a white fertilizer, and relates to the technical field of phosphorus chemical resource recycling. The process comprises the following steps: acid leaching: leaching the white fertilizer by using an acid leaching agent, and carrying out solid-liquid separation to obtain a filtrate containing phosphorus, fluorine, iron and aluminum and a calcium-containing filter residue; defluorination: mixing the filtrate with sodium sulfate, and carrying out defluorination reaction to obtain sodium fluosilicate precipitate and filtrate; extraction: adding an alcohol extraction agent into the filtrate to obtain an extraction phase and a raffinate phase; preparing ferric phosphate and aluminum phosphate: respectively dropwise adding ammonia water into the extraction phase and the raffinate phase, controlling the pH value, and filtering to obtain ferric phosphate filter residues, aluminum phosphate filter residues and filtrate; and preparation of monoammonium phosphate: collecting the filtrate, dropwise adding ammonia water into the filtrate, controlling the pH value, and filtering to obtain fertilizer-grade monoammonium phosphate filter residues. According to the method, resource utilization of phosphorus, calcium, fluorine, iron and aluminum in the white fertilizer is achieved, the method is simple and easy to implement, the utilization rate of phosphorus, calcium, fluorine, iron and aluminum can be effectively increased, and fluorine pollution is reduced.

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 discloses a method for preparing silicon tetrafluoride by pyrolyzing sodium fluosilicate. The preparation method comprises the following steps: (1) respectively crushing and sieving sodium fluosilicate and an auxiliary agent, and activating at 250-620 DEG C; (2) mixing the activated sodium fluosilicate with an auxiliary agent, and performing pyrolytic reaction to obtain a silicon tetrafluoride crude product and a residual solid; and purifying the silicon tetrafluoride crude product to obtain a silicon tetrafluoride product. The method solves the problems of wall sticking and caking in the process of preparing silicon tetrafluoride through fluosilicate pyrolysis, and the decomposition efficiency is remarkably improved. Residual solids generated by pyrolysis can be recycled, and no fluorine-containing waste is generated in the process, so that the influence on the environment is effectively reduced.

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.