62 results about "Sodium fluorosilicate" patented technology

The invention belongs to the field of industrial environment-friendly processes, and provides a process for preparing a powdery anhydrous accelerator by synergistic resource treatment of organic waste sulfuric acid and aluminum ash, which comprises the following steps: extracting aluminum ash, denitrifying and desalting, adjusting the acidity of waste sulfuric acid, calcining and reacting at high temperature, treating calcined waste gas and preparing the anhydrous accelerator. In a high-temperature state, sulfuric acid and metal oxides in the aluminum ash generate composite sulfate, and if the waste sulfuric acid contains organic matters, the organic matters are firstly combusted and removed; fluorine in the aluminum ash exists in the form of fluoride salt; adding magnesium sulfate, sodium fluosilicate and the like into the clinker, and uniformly mixing in a mixer to obtain the powdery anhydrous accelerator. The method is reasonable in design, capable of achieving co-processing, resource utilization and energy recovery, environmentally friendly, stable in process, diversified in product and suitable for large-scale popularization.

The application relates to the technical field of sodium fluorosilicate preparation, in particular to a device for continuously producing sodium fluorosilicate, which comprises a precipitation tank, a high-position tank one, a high-position tank two, a reaction box, a dissolving tank one and a dissolving tank two, a joint is fixed to the upper end surface of the precipitation tank, the precipitation tank is communicated with the high-position tank one through a pipeline, the bottom of the high-position tank one and the high-position tank two is communicated with the reaction box through a pipeline, and the high-position tank two is communicated with the dissolving tank one and the dissolving tank two through a pipeline; a stirring mechanism is arranged in the reaction box, the stirring mechanism comprises a stirring cavity which is arranged in the reaction box, and a sealing plate is screw-connected to the front end surface of the reaction box; the application is provided with the stirring mechanism and the crushing assembly; during the mixing reaction, block materials are generated; at this moment, the rotating speed of the motor is slowed down; the stirring blades are intermittently magnetically attracted through the electromagnets; the stirring blades are slightly displaced on the surface of the rotating shaft; and the block materials between the adjacent stirring blades are extruded and crushed.

The present invention relates to a combined inhibitor for lead-zinc oxide ore in lead-zinc sulfide tailings and its application, belonging to the technical field of lead-zinc oxide ore beneficiation. The combined inhibitor comprises sodium fluorosilicate, sodium sulfide, and sodium humate, wherein the mass ratio of the sodium fluorosilicate, sodium sulfide, and sodium humate is 2:5:1. The present invention also includes applying the combined inhibitor to a reverse flotation recovery process for lead-zinc oxide ore in lead-zinc sulfide tailings. The combined inhibitor and reverse flotation process employed in the present invention achieve simultaneous recovery of lead oxide and zinc oxide while ensuring flotation recovery efficiency, and have the advantages of a simple process and low equipment investment.

This application relates to the field of road engineering materials technology, and discloses a method for preparing modified phosphogypsum base material for road engineering, comprising the following steps: mixing aged phosphogypsum with ferrous sulfate heptahydrate, sodium fluorosilicate, and manganese sulfate monohydrate, utilizing the inherent moisture of the phosphogypsum to dissolve the salts and form an acidic slurry; adding heat-curing dry powder and high-speed shearing, utilizing the heat of hydration to raise the temperature to 65℃-85℃ to create a high-temperature strong alkaline environment, initiating manganese catalytic oxidation and slag thermal etching; subsequently, high-pressure injection of a rapid cooling conditioning liquid, utilizing the latent heat of vaporization to rapidly cool to below 45℃ to complete rapid cooling quenching and slow setting locking; unloading and aging to obtain the modified phosphogypsum base material. This invention, through the release of chemical energy by quicklime hydration to construct a high-temperature strong alkaline reaction field, achieves deep mineralization of impurities and reconstruction of the cementitious material network, significantly improving the water stability and mechanical properties of the base material.

This invention proposes an impact-resistant seawall repair adhesive and its preparation method, belonging to the field of adhesive technology. The impact-resistant seawall repair adhesive is prepared from the following raw materials in parts by weight: 70-100 parts water glass, 30-40 parts sodium fluorosilicate, 5-10 parts ammonium chloride, 10-15 parts curing agent, 30-50 parts dimethyl silicone oil, 5-7 parts metal oxide, 2-4 parts emulsifier, and 100-120 parts water. This impact-resistant seawall repair adhesive is a silicate inorganic adhesive that can withstand extremely high temperatures and large tensile and shear forces. It boasts advantages such as high bonding strength with the substrate and abundant raw material sources, good stability, and convenient operation.

This invention provides a scale inhibitor and its preparation method. The scale inhibitor is used for phosphogypsum leachate in a reverse osmosis membrane system. The scale inhibitor comprises the following raw materials in parts by weight: 10%-20% aluminum compound, 5%-10% organophosphonic acid, 2%-5% anionic surfactant, 4%-10% solvent, and the remainder is purified water. This addresses the problem of scaling in phosphogypsum leachate in reverse osmosis membrane systems by existing commercially available scale inhibitors, which suffer from poor targeting and scale inhibition effects. This invention introduces an aluminum compound, in which Al... 3+ It will react with silicon in a competitive manner with fluorine, from SiF6 2‑ Complex ions replace silicon to form acid-soluble AlF₂. x 3‑x Complexing ions cause SiF6 in the phosphogypsum leachate to form complex ions. 2‑ Reduce or inhibit SiF6 2‑ This reduces or inhibits the formation of potassium / sodium fluorosilicate scale.

The invention discloses a zinc smelting plant oxygen pressure leaching kettle gas phase region inorganic daub, and relates to the technical field of zinc smelting, the inorganic daub is prepared by mixing a component A and a component B, the component A is potash water glass, and the component B is prepared from the following raw materials: sodium fluosilicate, aluminum triphosphate, yellow lead powder and quartz sand. The heavy metal oxides aluminum triphosphate and yellow lead powder are added and have high proportions in the curing agent, so that a space system of the heavy metal oxides is formed in a curing system, and the corrosion resistance is enhanced; in addition, the inorganic filler is optimized, and the high-quality inorganic particle filler is added, so that the structural strength of a cured product is improved, and the scouring resistance is improved; the used raw materials are economical in price and easy to produce; and the construction process is more convenient.

This invention discloses a method for the resource utilization of phosphate ore sintering flue gas that can efficiently recover fluorine and sulfur resources, reduce treatment costs, and create resource benefits. The method includes the following steps: sequentially subjecting the sintering flue gas to dust removal, denitrification, and heat exchange to obtain a first gas and dust; reacting the first gas with water to generate a first solid-liquid mixture containing fluorosilicic acid and silica gel, and a second gas; performing solid-liquid separation on the first solid-liquid mixture to obtain a first solid phase mainly composed of silica gel and a first liquid phase mainly composed of fluorosilicic acid; reacting the first liquid phase with sodium sulfate to generate a second solid-liquid mixture containing sulfuric acid and sodium fluorosilicate; and performing solid-liquid separation on the second solid-liquid mixture to obtain a second solid phase mainly composed of sodium fluorosilicate and a second liquid phase mainly composed of sulfuric acid.

The invention relates to the field of photovoltaic production, in particular to a photovoltaic wastewater treatment method which comprises the following steps: mixing fluorine-containing wastewater with waste acid to obtain fluorine ion wastewater; adding waste silicon dioxide powder into the fluorine ion wastewater to obtain fluosilicic acid wastewater; adding an alkaline sodium source into the fluosilicic acid wastewater to obtain sodium fluosilicate wastewater; and carrying out separation treatment on the sodium fluosilicate wastewater, and extracting bottom-layer jelly to obtain sodium fluosilicate and photovoltaic treatment water. According to the method, waste acid and waste silicon dioxide powder generated in the photovoltaic production process are both utilized, the fluorine content in the wastewater is greatly reduced while no extra chlorine-containing fluorine removal agent is added, fluorine is extracted as a by-product with high purity, photovoltaic wastewater pollution is reduced, the environmental friendliness is improved, and meanwhile, the energy consumption is reduced. The wastewater treatment cost is further reduced, and potential profits are created.

The application discloses a ceramic paint for metal doors and a preparation method thereof, and relates to the technical field of paints. The ceramic paint prepared by the application contains sodium silicate, methyltrimethoxysilane, modified polyacrylate emulsion, modified silicon dioxide, glass powder, sodium fluorosilicate, dispersant, leveling agent and pure water. The modified polyacrylate emulsion is obtained by polymerizing phosphorus-containing monomers and vinyl monomers to generate polyacrylate, reacting the polyacrylate with 5-chloromethyl-2-pyrimidine amine after sulfonyl chlorination, and then emulsifying. The silicon dioxide is obtained by polymerizing aniline on the surface of pretreated silicon dioxide, reacting with 1-benzothiophene-5-carbonyl chloride, then salifying with diphenyl iodonium triflate and copper acetate, and then reacting with bis(2-ethynylphenyl) sulfane. The ceramic paint prepared by the application has good corrosion resistance, antibacterial property and anti-aging property, and greatly improves the performance of the metal door.

The invention discloses a glass factory high-concentration fluorine-containing wastewater treatment method, which comprises: S1, uniformly mixing high-concentration fluorine-containing wastewater with a sodium-containing solvent, stirring, carrying out pressure filtration treatment, and separating to obtain a first precipitate and a first filtrate; s2, adding a calcium-containing solvent into the first filtrate, uniformly mixing, stirring, carrying out filter pressing treatment, and separating to obtain a second precipitate and a second filtrate; and S3, adding lime into the second filtrate, stirring until the pH value of the solution is 7-8, carrying out filter pressing treatment, and separating to obtain a third precipitate and a third filtrate. According to the defluorination method, the utilization rate of fluorine ions can reach 96.5% through the first two times of precipitation, the first-stage precipitation is sodium fluoroaluminate and sodium fluosilicate, the second-stage precipitation is calcium fluoride with the purity as high as 80%, the cost is reduced, meanwhile, precipitates with economic benefits can be obtained, the fluorine ion content of clear liquid obtained after three times of defluorination treatment is smaller than 20 mg / L, and the fluorine ion content of the clear liquid obtained after three times of defluorination treatment is smaller than 20 mg / L. And the emission standard can be reached.

The invention relates to the technical field of chemical product preparation, in particular to pure sandy sodium fluosilicate as well as a preparation method and application thereof. The preparation method of the pure sandy sodium fluosilicate comprises the following steps: S1, adding industrial sodium sulfate into hot water, dissolving, filtering to obtain a sodium sulfate solution, slowly adding the sodium sulfate solution into a fluosilicic acid solution according to a molar ratio of the fluosilicic acid solution to the sodium sulfate solution of 1: 1, stirring, centrifuging, and filtering to obtain a sodium fluosilicate filter cake; s2, dissolving the sodium fluosilicate filter cake in pure water according to a ratio of 1: 30 to obtain a colorless and transparent sodium fluosilicate saturated solution; s3, mixing the crushed ice blocks frozen by the pure water with cold pure water at 0-5 DEG C to obtain an ice-water mixture; preparing a sandy sodium fluosilicate seed crystal; s4, adding an ice-water mixture into the sodium fluosilicate saturated solution; meanwhile, adding sandy sodium fluosilicate seed crystals; s5, sodium fluosilicate crystals are separated out, the sodium fluosilicate crystals are centrifuged and dried, and a sand-like sodium fluosilicate finished product is obtained.

The present invention discloses a heat-resistant microcrystalline glass and a preparation method thereof. The raw materials for preparing the heat-resistant microcrystalline glass include: 58-62 parts by mass of microsilica powder; 10-14 parts by mass of magnesium smelting dust ash; 4-8 parts by mass of aluminum oxide; 5-10 parts by mass of sodium carbonate; 4-6 parts by mass of borax pentahydrate, 2-4 parts by mass of lithium carbonate; 1-3 parts by mass of zinc oxide; 1-2 parts by mass of zirconium oxide; and 3-5 parts by mass of sodium fluorosilicate. The preparation method includes mixing and prefabrication, melt water quenching, ball milling, and high-temperature nucleation and crystallization. The present invention utilizes the complementarity of the two components of microsilica powder and magnesium smelting dust ash to produce a heat-resistant microcrystalline glass in the production system, realizing the transformation of waste into treasure and greatly increasing the added value of the two by-products.

The application discloses a kind of sodium fluorosilicate production optimization calculation method, the surface energy of different crystal faces of sodium fluorosilicate is calculated, and the minimum crystal face is selected;For the minimum crystal face of the surface energy, preset the surface of electronic density is used to draw and display surface electrostatic potential and calculate energy;Obtain a preset number of impurity ions, calculate the energy of the preset number of fluorine ions in the minimum crystal face of the surface energy replaced by the impurity ions, and output the energy difference after replacement according to the calculated energy.The application calculates the surface energy of different crystal faces of sodium fluorosilicate, selects the minimum crystal face of the surface energy as the leading crystal face and carries out subsequent calculation.Then, the energy change of the fluorine ion in sodium fluorosilicate replaced by impurity ion is calculated, the binding energy of impurity ion and sodium fluorosilicate leading crystal face is shown by calculation result, the energy change of crystal surface energy and crystal growth caused by impurity ion is given, and the influence of impurity on sodium fluorosilicate production can be accurately judged according to the energy.

The invention discloses a method for synergistically preparing and purifying sodium fluosilicate by using fluorine-containing waste acid and fly ash. The method comprises the following steps: crushing household garbage incineration fly ash, pulping, pickling, and carrying out solid-liquid separation to obtain crude calcium water; sequentially carrying out heavy metal removal, denitrification, oxidation and neutralization treatment on the crude calcium water, and carrying out solid-liquid separation to obtain refined calcium water; carrying out primary calcium removal treatment on the obtained refined calcium water, and carrying out solid-liquid separation to obtain crude brine; carrying out deep calcium removal treatment on the crude brine to obtain refined brine mainly containing sodium chloride; pretreating the fluorine-containing waste acid to obtain a fluosilicic acid solution; mixing and reacting the fluosilicic acid solution with refined salt water, controlling the pH value of a reaction system to be less than 2, and performing solid-liquid separation to obtain crude sodium fluosilicate; and carrying out multistage countercurrent oxidation washing on the crude sodium fluosilicate, and drying to obtain a sodium fluosilicate product. And resource comprehensive utilization of the fluorine-containing waste acid and the fly ash is realized.

The invention belongs to the technical field of pigment preparation, and particularly relates to a waterproof interior paint as well as a preparation method and application thereof. The preparation method comprises the following steps: uniformly mixing quartz sand, alkali powder, potassium carbonate, zinc oxide, borax, antimony oxide and sodium fluosilicate, grinding and sieving to obtain a basic raw material; grinding and sieving the additive to obtain a coloring agent; uniformly mixing the basic raw material with the coloring agent to obtain the waterproof interior paint; blending the waterproof inner painting pigment with a medium flux to obtain a colored drawing pigment; painting on the surface of the inner painting green body by using a colored painting pigment to obtain a colored painting green body; and drying the colored drawing green body, baking and annealing to obtain an inner painting work. According to an inner painting product drawn by the waterproof inner painting pigment, the color of a picture cannot be affected by factors such as water meeting, liquid containing, damp, corrosion, exposure to the sun or touch, the phenomena of picture fading, contamination, falling and the like can be effectively avoided, and storage and collection of the inner painting product and design, production and popularization of the practical inner painting product are facilitated.

Provided is an automatic method for producing a fluorine-containing crystalline product from a hydrofluoric acid solution, comprising: sensing the concentration of the hydrofluoric acid solution, and presetting a feeding flow rate; outputting a predetermined flow rate of the reaction solution by an automatic control module based on the concentration and the flow rate of the hydrofluoric acid solution and the concentration of the reaction solution; feeding the reaction solution and the hydrofluoric acid solution into the reaction area; sensing the in-situ fluoride ion concentration of the solution in the reaction area in real time, and controlling the feeding flow rate of the reaction solution in real time by the automatic control module; sensing the precipitation height of the fluorine-containing crystals in real time, and controlling whether to discharge the fluorine-containing crystals by the automatic control module. The method can be used to easily treat the hydrofluoric acid solution with a high concentration, accordingly obtaining sodium fluoroaluminate crystalline products or sodium fluorosilicate crystalline products with sand-like shape, low moisture content, and high sodium-to-aluminum ratio.

This invention discloses a method for separating fluorosilicic acid and hydrofluoric acid using an anion exchange membrane, comprising the following steps: adding a flocculant to a fluorosilicic acid-hydrofluoric acid mixture, aging it, then adding a desulfurizing agent to carry out a desulfurization reaction to obtain a mixed solution, adding the mixed solution to the feed side of an anion exchange membrane for membrane separation, and obtaining a hydrofluoric acid solution with a mass concentration of 2-30% on the clear water side after separation. This invention uses a flocculant to rapidly settle solids such as sodium fluorosilicate and potassium fluorosilicate in the fluorosilicic acid-hydrofluoric acid mixture, uses a desulfurizing agent to remove sulfuric acid, and then uses an anion exchange membrane to effectively separate fluorosilicic acid and hydrofluoric acid in the fluorosilicic acid-hydrofluoric acid mixed solution. The hydrofluoric acid separated by membrane separation has high purity and high output value, increases the utilization rate of by-product hydrofluoric acid, and reduces costs.

The invention discloses a fluorine modified asphalt anticorrosive paint and a preparation method thereof, and relates to the technical field of metal anticorrosive coatings, the paint comprises the following components by weight: 10%-25% of a fluorine material, 0.5%-3% of an emulsifier, 50%-70% of modified asphalt, 0.5%-3% of a stabilizer, 0.1%-2% of a pH value regulator, 0.1%-2% of a leveling agent and 0.1%-2% of a dispersant; the fluorine material is one or more of calcium fluoride, magnesium fluoride, sodium fluosilicate and fluorine-modified epoxy resin, and when the fluorine material is more than the calcium fluoride, the magnesium fluoride, the sodium fluosilicate and the fluorine-modified epoxy resin, the weight ratio of the components is 1: 1; according to the invention, the fluorine material and the modified asphalt are selected as the core and are matched with the adaptive assistant to realize synergistic interaction, so that the corrosion resistance, weather resistance and aging resistance of the coating are remarkably improved, and efficient production and stable quality of the coating are ensured by optimizing the preparation process, such as key links of pre-dispersion, precise temperature-control emulsification, strict mixing, additive compounding and the like; the final product is high in purity and good in homogeneity, and various anticorrosion requirements are met.

The application belongs to the technical field of glass materials, and particularly relates to a black high-hardness heat-resistant microcrystalline glassware and a preparation method thereof. The black high-hardness heat-resistant microcrystalline glassware is prepared by taking silica, sodium oxide, aluminum oxide, potassium oxide, boron oxide, magnesium oxide, calcium oxide, zinc oxide, sodium fluorosilicate, iron oxide, manganese oxide, fluorite, lithium oxide, metal manganese coated with silica, and black tourmaline as raw materials, and through the processes of high-temperature melting mixing, compression molding, annealing and tempering. The black high-hardness heat-resistant microcrystalline glassware has excellent performance, high hardness and good heat resistance, and has potential market value.

The invention relates to the technical field of coatings, in particular to an inorganic acid-proof wear-resistant coating and a preparation method thereof. The inorganic acid-proof wear-resistant coating is prepared from the following raw materials in parts by mass: 10 to 30 parts of binding agent, 40 to 60 parts of emery powder, 15 to 40 parts of silicon carbide, 2 to 8 parts of aluminum oxide micro powder, 2 to 8 parts of nano silicon dioxide, 1 to 10 parts of Guangxi soil, 0.1 to 2 parts of sodium fluosilicate and 1 to 40 parts of water, the invention discloses an inorganic acid-proof wear-resistant coating and a preparation method thereof, and the inorganic acid-proof wear-resistant coating prepared by the method has good adhesion, corrosion resistance, hardness, wear resistance, impact resistance and high temperature resistance.

The invention discloses a micro-expansion high-temperature resistant insulation board and a preparation method thereof. The raw materials comprise, by mass percentage, 30% to 75% of low-temperature expanded vermiculite, 5% to 30% of kyanite and / or andalusite, 5% to 20% of premixed powder, and 15% to 40% of a binder. The low-temperature expanded vermiculite is incompletely expanded vermiculite obtained by expanding raw vermiculite at 400 to 600° C. for 1 to 2 minutes. Based on 100% of the total mass of the raw materials, the premixed powder comprises 1% to 5% of explosion-proof fiber micropowder, 1% to 3% of a dispersant, 1% to 10% of light-burned magnesia micropowder, 1% to 5% of silicon micropowder, and 1% to 5% of an admixture. The admixture is at least one of sodium tripolyphosphate, aluminum hexametaphosphate, sodium fluorosilicate, and potassium fluorosilicate. The binder is a modified sodium silicate and / or potassium silicate solution to which aluminum oxide and / or zirconium oxide fibers are added. Preparation method: the raw materials are mixed and then molded, and dried at 120-300°C for 2-4 hours to obtain a slightly expanded high-temperature resistant insulation board.

The invention belongs to the technical field of preparation of ceramic frits, and particularly relates to a high-whiteness ceramic frit and a preparation method thereof. The high-whiteness ceramic frit is prepared from the following raw materials: quartz, calcined aluminum oxide, lithium china clay ore, magnesium slag, cordierite powder, lanthanum silicate, strontium tetraborate, sodium fluosilicate, nano sodium zirconium phosphate, nano yttrium aluminate and nano samarium oxide. In the high-whiteness ceramic frit provided by the invention, quartz and calcined alumina form a continuous aluminosilicate glass phase three-dimensional network structure; the lithium china clay ore, the magnesium slag, the strontium tetraborate and the sodium fluosilicate have a synergistic effect and are filled in pores of a three-dimensional network structure to promote densification of ceramic frits, so that whiteness scattering and mechanical property degradation caused by the pores are avoided; the mechanical property of the ceramic frit is ensured by introducing cordierite powder and lanthanum silicate; nano sodium zirconium phosphate, nano yttrium aluminate and nano samarium oxide are added as functional fillers, so that the whiteness of the ceramic frit is further improved.

This invention discloses a rose essential oil sleep-aiding latex pillow and its processing method. The latex pillow comprises the following components in parts by weight: 90-100 parts natural latex, 1-9 parts sulfur, 1-5 parts vulcanization accelerator, 1.5-2 parts anti-aging agent, 1-6 parts zinc oxide, 0.5-2 parts sodium fluorosilicate, 1-3 parts potassium ricinoleate, 0.1-2 parts potassium oleate, 0.1-2 parts potassium pyrophosphate, 0.00001-0.001 parts red pigment, and 0.0001-0.1 parts modified rose essential oil. The latex pillow is light pink in color, with the pigment content less than one-thousandth, and does not fade after washing. The modified rose essential oil has a fragrant rose scent. The natural latex content of the rose essential oil sleep-aiding latex pillow reaches 94%. The latex pillow prepared by this invention promotes sleep and is convenient and reliable.

The application discloses a cement-based water-permeable pavement strength recovery agent and a use method thereof. The strength recovery maintenance agent comprises components A, B and C, wherein the component A comprises the following raw materials in percentage by weight: calcium salt 15-25%, fluorine-containing surfactant 3-5% and the balance of water; the component B comprises the following raw materials in percentage by weight: water-soluble modified chitosan 18-22%, water glass 20-35%, sodium fluorosilicate 5-10% and the balance of water; and the component C comprises the following raw materials in percentage by weight: calcium salt 35-45%, fluorine-containing surfactant 3-5%, thickening agent 12-25% and the balance of water. The strength recovery agent is sprayed to the cement-based water-permeable pavement in sequence in the form of A, B and C. The strength recovery maintenance agent can effectively recover and improve the strength of damaged cement-based water-permeable pavement materials and improve the overall service life of the water-permeable pavement.

The application relates to the technical field of microporous quartz, and discloses a microporous quartz formula and a preparation method thereof, which comprises the following components by weight: modified bentonite 10-20 parts, kaolin 10-15 parts, a binder 6-8 parts, sodium fluorosilicate 10-12 parts, quartz powder 20-25 parts, SiO2 60-80 parts, Al2O3 1-3 parts, TiO2 2-4 parts, BaO 1-2 parts, MnO 0.2-0.4 parts, MgO 1.2-2.5 parts and K2O 0.5-1.5 parts; the preparation method of the microporous quartz formula is as follows: the raw materials are stirred and mixed according to the proportion, are stirred for 3-5 hours at 110-120 DEG C, and then initial materials in a molten state are obtained; then, the initial materials in the molten state are added into a microporous quartz model, and the preparation is completed; the microporous quartz formula has good effects of fire resistance, wear resistance and antibiosis.

An automated production method is provided for producing fluorine-containing crystalline products using a hydrofluoric acid solution. [Solution] The method comprises sensing the concentration of the hydrofluoric acid solution and pre-setting the supply flow rate; an automatic control module outputting a predetermined flow rate of the reaction solution based on the concentration and flow rate of the hydrofluoric acid solution and the concentration of the reaction solution; supplying the reaction solution and the hydrofluoric acid solution to the reaction zone; sensing the fluoride ion concentration of the solution in the reaction zone in real time and controlling the supply flow rate of the reaction solution in real time by the automatic control module; and sensing the precipitation height of the fluorine-containing crystals in real time and controlling whether or not to discharge the fluorine-containing crystals by the automatic control module. The present invention makes it possible to obtain granular sodium fluoroaluminate crystals or sodium fluorosilicate crystals with low water content and high Na / Al molecular ratio by processing a high-concentration hydrofluoric acid solution in a simple manner.

This invention discloses a polymeric aluminum iron silicate and its preparation method, belonging to the field of water treatment technology. The method utilizes the mother liquor generated during the production of sodium fluorosilicate from fluorine-containing waste acid, comprising the following steps: S1: Adding acid to the mother liquor, stirring to produce a precipitate, filtering, washing, and drying the precipitate to obtain silicic acid, then adding alkali to react with the silicic acid for 1.8-2.2 hours to obtain a sodium silicate solution; S2: Adding an oxidant to steel pickling waste liquid containing ferrous ions and free acid, stirring to obtain polyferric chloride; S3: Mixing the sodium silicate solution obtained in step S1, the polyferric chloride obtained in step S2, polyaluminum chloride, and a stabilizer, and aging to form polymeric aluminum iron silicate. This invention utilizes waste materials, and the resulting polymeric aluminum iron silicate exhibits good stability.

The present invention belongs to the field of building materials technology, and discloses a modified potassium magnesium phosphate cement and its application. The present invention uses a mixture of carbide slag, fly ash and sodium fluorosilicate to replace part of overburned magnesium oxide to prepare modified potassium magnesium phosphate cement. Fly ash, carbide slag and sodium fluorosilicate are mixed in a mass ratio of 6.5:3:0.5. Studies have shown that the compressive strength of modified potassium magnesium phosphate cement increases first and then decreases with the increase of the modified raw material dosage. When the dosage is 20%, the compressive strength reaches a maximum, and its 28d compressive strength increase reaches 22%. At this time, the compressive strength is 45.82MPa. The modified potassium magnesium phosphate cement of the present invention also shows good water resistance, wherein the compressive strength retention coefficients of the two groups of specimens M1 and M2 under the 7+60d curing system are 0.9443 and 1.0141 respectively. The present invention provides a modified potassium magnesium phosphate cement with better performance, which is of great significance to the promotion and application of potassium magnesium phosphate cement.

The invention belongs to the technical field of glass-lined porcelain glaze, and particularly relates to a glass-lined porcelain glaze formula and a production process. According to the glass-lined porcelain glaze formula, porcelain glaze powder is prepared from the following components in parts by mass: 34 to 40 parts of silicon dioxide, 12 to 18 parts of boric oxide, 5.5 to 10 parts of phosphorus pentoxide, 12 to 15 parts of aluminum oxide, 2 to 4 parts of sodium fluosilicate, 1.5 to 3 parts of titanium dioxide, 10 to 15 parts of sodium oxide, 3 to 5 parts of potassium oxide, 3 to 8 parts of calcium oxide, 1 to 2 parts of nickel oxide and 0.5 to 1 part of cobalt oxide. The melting temperature and the sintering temperature are reduced by adjusting the components of the porcelain glaze in the prior art, so that the sintered glass-lined porcelain glaze is compact in structural network and good in chemical corrosion resistance, and the toughening auxiliary agent forms a physical barrier for hindering crack growth in the structural network of the glass-lined porcelain glaze, so that the porosity is reduced, and the toughness of the glass-lined porcelain glaze is improved. The mechanical property and the thermal shock resistance of the glass-lined ceramic glaze are improved.