34 results about "Sodium fluorosilicate" patented technology

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.

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 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 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 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.

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.

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.

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.

This application relates to an anti-mildew sponge material and its preparation method, belonging to the field of sponge material technology; the anti-mildew sponge material comprises the following raw materials in parts by weight: 100-120 parts natural latex, 1-3 parts sulfur, 1.5-2.2 parts accelerator, 1.8-2.2 parts potassium oleate, 2.2-2.4 parts ammonium sulfate, 1-3 parts zinc oxide, 0.2-0.6 parts sodium fluorosilicate, 2-6 parts pineapple leaf fiber, and 0.8-1.6 parts potassium hydroxide; this application has the effect of improving the anti-mildew and antibacterial properties of sponge materials.

The invention discloses a rapid curing type ferrous metallurgy waste fly ash pellet binder and a preparation method thereof. The binder comprises sodium fluosilicate, water glass, modified bentonite and chitosan polyacrylic acid doped calcium oxide nanoparticles in parts by mass, and is prepared by mixing the components with converter dedusting ash and oxide scale, adding water, stirring and performing hydraulic forming. The modified bentonite is prepared by carrying out microwave reaction on pretreated bentonite, acrylic acid, carboxymethyl cellulose and a cross-linking agent; the chitosan polyacrylic acid doped calcium oxide nanoparticles are prepared by reacting and precipitating a chitosan-polyacrylic acid compound and Ca < 2 + > ions. Experimental results show that pellets prepared by the binder have green pellet drop strength of 4.4-4.6 times and dry pellet compressive strength of 11.12-11.26 MPa, which are obviously superior to those of traditional binders, and can quickly form a stable skeleton structure in a wet state, improve the dry pellet strength and significantly improve the mechanical properties and impact resistance of the pellets.

The present application provides an automatic production method for producing fluorine-containing crystalline product by using hydrofluoric acid solution, which comprises: sensing the concentration of the hydrofluoric acid solution and presetting the feeding flow rate; an automatic control module outputting the predetermined flow rate of the reaction solution according to the concentration of the hydrofluoric acid solution and the flow rate and the concentration of the reaction solution; feeding the reaction solution and the hydrofluoric acid solution into a reaction zone; instantaneously sensing the fluorine ion concentration of the solution in the reaction zone, and the automatic control module instantaneously controlling the feeding flow rate of the reaction solution; instantaneously sensing the settling height of the fluorine-containing crystalline product, and the automatic control module controlling whether to discharge the fluorine-containing crystalline product. The present application can process high-concentration hydrofluoric acid solution in a simple way, and thus obtain sand-like, low-moisture, high-sodium / aluminum molecular ratio sodium fluoroaluminate crystalline product or sodium fluorosilicate crystalline product.

The invention discloses a water-based permeable crystallization type waterproof material based on concrete, and relates to the technical field of building waterproofing. According to the preparation method, a permeation-crystallization-enhancement integrated technical scheme is constructed by accurately regulating and controlling the modulus of sodium silicate and introducing a nano-composite enhancement system and a dual-catalysis synergistic mechanism. The material is prepared from sodium silicate (22%-24%), triethanolamine (4%-6%), sodium fluosilicate (0.8%-1.2%), nano silicon dioxide (1.5%-2.5%), superfine silica fume (3%-5%), tartaric acid (0.2%-0.4%) and deionized water through raw material purification, nano dispersion, step-by-step compounding and constant-temperature curing. The penetration depth of the product reaches 30 mm-40 mm, cracks with the thickness of 0.8 mm-1. 0 mm can be repaired, the freeze-thaw cycle is larger than or equal to 150 times, the pH value is 11.0 + / -0.5, the compatibility with a concrete base surface is excellent, the product is suitable for waterproofing of multiple scenes such as buildings, water conservancy and ocean engineering, and the service life is the same as that of the buildings.

The invention discloses a PPS purification process and a PPS material, and relates to the field of PPS preparation, the purification process comprises the following steps: carrying out primary water washing on PPS polymerization slurry, and then carrying out primary filtration to obtain a filter cake a; preparing the filter cake a into slurry a, dropwise adding the solution a and mixing with the solution b, and after mixing and stirring are completed, carrying out heat preservation and aging to obtain slurry b; stirring the slurry b at a controlled temperature to room temperature, standing to obtain slurry c, performing secondary filtration on the slurry c to obtain a filter cake b, and performing secondary washing and vacuum drying on the filter cake b to obtain PPS powder. According to the invention, primary washing and filtering are carried out on the PPS polymerization slurry, such that sodium ion load is preliminarily reduced; pulping the obtained filter cake a, adding the solution a and the solution b, mixing, stirring, preserving heat and aging, so that sodium ions are converted into insoluble sodium fluosilicate crystals; finally, the slurry b is subjected to treatment such as temperature-controlled stirring, efficient separation and deep purification of PPS and impurity crystals are achieved, and the sodium ion content of the final PPS powder is reduced to 30-80 ppm.

The application provides a pervious concrete additive, which comprises the following components in the following weight percentage: 5-8 wt% of boric acid, 3-9 wt% of sodium fluorosilicate, 12-15 wt% of magnesium chloride, 2-8 wt% of sodium hexametaphosphate, 2-4 wt% of silicon nitride powder, 4-10 wt% of potassium chloride, 10-12 wt% of calcium chloride, 0.1-0.2 wt% of chelating dispersant, 0.05-0.09 wt% of sodium gluconate, and the balance of water. The pervious concrete and the pervious concrete pavement prepared by using the pervious concrete additive disclosed in the application have excellent mechanical properties, durability and low-temperature pervious properties, and can solve the defects of low strength and poor frost resistance of the pervious concrete.

The application discloses a kind of lead removal agent, including the following mass percentage of components: 30-50% boron calcium alloy, 10-20% sodium fluorosilicate, 10-20% sodium fluoroaluminate, 15-25% calcium fluoride and 5-10% silicon dioxide.The application also discloses the application of the lead removal agent in waste brass lead removal and the method for producing lead-free brass by using waste brass.The lead removal agent of the application contains boron calcium alloy, which can react with Pb and Pb compound in copper water to generate CaPb and CaPb2.CaPb and CaPb2 have low density and can float to be fished out.B element can react with Al and Fe in copper to produce heterogeneous nucleation points, which can provide crystallization nucleation during melting and crystallization process, and can greatly refine ingot grain structure.The lead removal agent of the application can reduce the Pb content in waste brass to 0.01wt%, and has excellent lead removal effect, and has wide application prospect in waste brass recovery and recycling.

The application discloses a kind of quick repair materials of local damage of road small box girder and preparation method thereof, belong to road engineering material field.The material is composed of powder component A and liquid component B;Powder component A includes heavy-burning magnesium oxide, metakaolin, active zinc oxide, wollastonite powder, sodium fluorosilicate, borax pentahydrate and potassium dihydrogen phosphate, liquid component B includes water and sodium citrate;Preparation method uses step-by-step process, first sodium fluorosilicate, borax and metakaolin are premixed, then main mixing is carried out with other raw materials.The application utilizes reaction heat release to promote the release of fluoride ion, quickly excites metakaolin to generate composite gel, cooperates with the water resistance modification of zinc oxide and the interface enhancement effect of wollastonite, solves the problem of poor water resistance and weak interface bonding force of traditional material, has the characteristics of quick setting, high early strength, good water resistance and firm interface bonding.

The application relates to the field of building materials, and particularly discloses a high-strength composite cement grinding aid and a preparation method thereof.A high-strength composite cement grinding aid comprises the following components: triethanolamine, pentaerythritol, methylhydroxyethyl cellulose, sodium fluorosilicate, molasses and water.A high-strength composite cement grinding aid is prepared by mixing the components in sequence.The grinding aid has the advantages of good grinding effect and high late-strength of the prepared cement mortar; in addition, the preparation method is simple and convenient, and easy for industrial production.

The present application relates to the technical field of sodium fluorosilicate wastewater treatment, and specifically discloses a sodium fluorosilicate production wastewater suspended matter treatment device, which comprises a bracket, the bracket is fixedly provided with a treatment tank, the top of the treatment tank is fixedly provided with a fixed sleeve shaft, one end of the fixed sleeve shaft penetrates through the top of the treatment tank, the fixed sleeve shaft penetrates through a rotating sleeve shaft and is rotatably connected with the rotating sleeve shaft, the outer surface of the rotating sleeve shaft is fixedly provided with a stirring rod one, the fixed sleeve shaft penetrates through a rotating sleeve shaft two and is rotatably connected with the rotating sleeve shaft two, and the outer surface of the rotating sleeve shaft two is fixedly connected with a stirring rod two. The device can effectively add flocculants to the wastewater while stirring the wastewater in two directions, so that the flocculants and the wastewater are fully mixed, and the settling speed of the suspended matter in the sodium fluorosilicate production wastewater is improved.

The invention belongs to the technical field of microcrystalline glass materials, and particularly relates to coal gangue-based microcrystalline glass as well as a preparation method and application thereof. The coal gangue-based glass ceramic provided by the invention is prepared from the following raw materials in percentage by mass: 50-71% of coal gangue, 2-7% of sodium fluosilicate, 7-11% of sodium carbonate, 10-20% of calcite, 0-15% of quartz sand and 3-8% of caustic calcined magnesite. The wear resistance and mechanical strength of the glass ceramic are improved by limiting the specific types and dosage of the raw materials, and the application range of the glass ceramic is widened while coal gangue is recycled. The invention also provides a preparation method of the gangue-based glass ceramic. The preparation method comprises the following steps: mixing the preparation raw materials, and melting to obtain a melt; after the melt is formed, nucleation treatment, crystallization treatment and cooling treatment are sequentially carried out, and the coal gangue-based glass ceramic is obtained. The preparation method is simple in process and suitable for industrial production.

This invention belongs to the field of ceramic frit preparation technology, specifically relating to a high-whiteness ceramic frit and its preparation method. The high-whiteness ceramic frit of this invention is composed of the following raw materials: quartz, calcined alumina, lithium kaolin ore, magnesium slag, cordierite powder, lanthanum silicate, strontium tetraborate, sodium fluorosilicate, nano-sodium zirconium phosphate, nano-yttrium aluminate, and nano-samarium oxide. In the high-whiteness ceramic frit of this invention, quartz and calcined alumina form a continuous aluminosilicate glass phase three-dimensional network structure; lithium kaolin ore, magnesium slag, strontium tetraborate, and sodium fluorosilicate work synergistically to fill the pores of the three-dimensional network structure to promote the densification of the ceramic frit and avoid whiteness scattering and mechanical property degradation caused by pores; the introduction of cordierite powder and lanthanum silicate ensures the mechanical properties of the ceramic frit; the addition of nano-sodium zirconium phosphate, nano-yttrium aluminate, and nano-samarium oxide as functional fillers further enhances the whiteness of the ceramic frit.

The present application belongs to the field of industrial environmental protection process, and proposes a process for preparing powder anhydrous quick coagulant by synergistically processing organic waste sulfuric acid and aluminum ash, which comprises the following steps: aluminum ash extraction, denitrification and desalination, waste sulfuric acid acidity adjustment, high-temperature calcination and reaction, calcined waste gas treatment, and preparation of anhydrous quick coagulant; under high-temperature conditions, sulfuric acid and metal oxides in aluminum ash generate composite sulfates, and if the waste sulfuric acid contains organic matter, the organic matter is first burned to remove the organic matter; the fluorine in the aluminum ash exists in the form of fluoride salt to obtain clinker; the clinker is added with magnesium sulfate, sodium fluorosilicate and the like, and uniformly mixed in a mixer to obtain powder anhydrous quick coagulant. The present application is rationally designed and can realize synergistic disposal, resource utilization, energy recovery, environmental friendliness, process stability and product diversification, and is suitable for large-scale promotion.

The invention provides mesoporous silica and a preparation method thereof. The preparation method of the mesoporous silica comprises the following steps: obtaining a mixed system containing a first silicon source precursor, a soft template reagent and a second silicon source precursor; carrying out a sol-gel reaction on the double-silicon-source mixed system, carrying out solid-liquid separation, and collecting a solid phase to obtain a mesoporous silica precursor; wherein the first silicon source precursor comprises sodium silicate; the second silicon source precursor comprises sodium fluosilicate and / or ammonium fluosilicate. According to the method for preparing the mesoporous silicon dioxide, a double-silicon-source synergistic hydrolysis method is creatively used, the mesoporous silicon dioxide with a high specific surface area is prepared under the condition that an additional acid reagent or alkali reagent is not needed, and a brand new method is provided for synthesis of the mesoporous silicon dioxide.

The present application relates to the production process of ceramic color, in particular to a kind of silver gray ceramic color and its production method, the method is by controlling the granularity of fused zirconia, adding quartz powder, coloring agent cobalt oxide, nickel oxide, chrome green, iron oxide, auxiliary material sodium fluorosilicate, magnesium fluoride, potassium chloride, according to certain proportion is mixed and grinded, then the mixed material is heated and calcined, after cooling, again after grinding and crushing, the sample is prepared.The silver gray color produced is in the better color effect, the process flow is simple, harmful gas is not produced in the production process, the process is green and environmental protection, under the same conditions, the color material use cost of ceramic color industry is saved, the product demand in the field such as daily-use ceramic and industrial ceramic is met.

The invention discloses a process for scale inhibition and fluorine extraction in a wet-process phosphoric acid reaction process. The method comprises the following steps: carrying out acidolysis on phosphorite by using phosphoric acid, adding a composite scale inhibitor into acidolysis slurry, carrying out full reaction, introducing the acidolysis slurry into a flash evaporation device for flash evaporation, introducing flash evaporation tail gas and reaction tank tail gas into a gas absorption device, carrying out water absorption to generate a fluosilicic acid solution, adding sulfuric acid into the slurry subjected to flash evaporation, and carrying out solid-liquid separation to obtain the fluosilicic acid. And filtering after reaction to obtain wet-process phosphoric acid and phosphogypsum. The phosphorite is decomposed through phosphoric acid, direct contact between sulfuric acid and the phosphorite is avoided, dissolution of feldspar in the phosphorite is reduced, the content of liquid-phase sodium and potassium ions is reduced, generation of main scaling substances sodium fluosilicate and potassium fluosilicate of wet-process phosphoric acid is reduced, and the content of liquid-phase aluminum ions is reduced; the addition of the composite scale inhibitor not only further reduces the generation of sodium fluosilicate and potassium fluosilicate through the dual effects of chelating metal ions and dispersing particles, but also provides a proper amount of active silicon substances for the subsequent flash evaporation process.