1688results about "Silica" patented technology

The invention relates to the technical field of quartz sand purification, in particular to a high-purity quartz sand purification method and equipment. 2, a magnetic separation stage; 3, an acid leaching stage; 4, an ultrasonic-assisted cleaning stage; 5, a high-temperature chlorination treatment stage; according to the quartz sand purification method, various impurities such as magnetic impurities, non-magnetic metal impurities and silicate impurities in the quartz sand can be deeply removed through the synergistic effect of multiple steps such as pretreatment, magnetic separation, acid leaching, ultrasonic-assisted cleaning and high-temperature chlorination treatment, the purity of the quartz sand reaches 99.999% or above, the strict requirements of high-end fields such as semiconductors and photovoltaics are met, and the method is suitable for industrial production. The purification steps are closely linked to form a modular purification process, and meanwhile, advanced technologies such as ultrasonic-assisted cleaning and high-temperature chlorination treatment are adopted, so that the impurity removal efficiency is remarkably improved, the purification time is shortened, and the energy consumption and the use amount of chemical reagents are reduced by optimizing the process and equipment.

This invention belongs to the field of polymer material reinforcement and toughening, specifically relating to a spiked-mesoporous silica nanosphere, its preparation method, and its application in polymer material reinforcement and toughening. The basic steps for synthesizing this spiked-mesoporous silica nanosphere include: firstly, synthesizing low-crosslinked, smooth-surfaced mesoporous silica nanospheres through an oil-water two-phase reaction system; subsequently, inducing normal shrinkage of the pore walls through secondary deep crosslinking to form a rigid nanospike surface structure while maintaining the original mesoporous structure. This spiked-mesoporous silica nanosphere exhibits good monodispersity, high particle size uniformity (50-100 nm adjustable), centrally divergent mesopores with high pore size uniformity (6-8 nm adjustable), highly open pores on the sphere surface, and spike height adjustable from 3-5 nm. This material is suitable for reinforcing and toughening various elastomers, resins, and other polymer materials, effectively overcoming the "strength-toughness mutual exclusion" problem and synergistically enhancing existing mechanical property reinforcement systems.

The invention provides a method for recovering Si, C and TiO2 based on chlorinated waste salt water quenching slag, which comprises the following steps: sequentially carrying out water quenching dissolution, precipitation separation and filter pressing dehydration treatment on chlorinated waste salt to obtain water quenching slag and supernate; adding a dilute acid solution into the water-quenched slag, dissolving, and adding a reducing agent for reaction to obtain slurry; carrying out solid-liquid separation on the slurry to obtain a solid material and filtrate; the filtrate is pumped into a boiling bed separator, the petroleum coke and TiO2 are intercepted by a medium material layer, clear liquid is discharged, then the medium material layer is subjected to backwashing regeneration, and the desorbed petroleum coke and TiO2 are subjected to graded enrichment by a hydrocyclone, so that petroleum coke slurry and TiO2 slurry are obtained. According to the method, TiO2, C and other resources in the water-quenched slag obtained after molten salt chlorination waste salt water quenching are recycled, and the technical problem that in the existing chlorination waste salt resourceful treatment process, Si, C, TiO2 and other resources in the water-quenched slag are wasted is solved.

The invention discloses a preparation method of low-carbon-content high-purity quartz sand, which comprises the following steps: carrying out alkaline hydrolysis and drying on organosilane to obtain alkaline xerogel, putting the alkaline xerogel into a quartz tube of a rotary tube furnace, starting the furnace body, adjusting the rotation rate, heating to a specific low temperature, and introducing nitrogen to replace air; introducing oxygen, controlling the pressure, carrying out oxidation reaction, relieving the pressure to normal pressure after the reaction, pumping and discharging the product, and repeating the oxidation and pumping steps for many times until the tail gas carbon dioxide reaches the standard; raising the temperature, introducing chlorine-containing gas for purification, finally raising the temperature to a sintering temperature, and sintering in an air atmosphere to obtain the low-carbon-content high-purity quartz sand. According to the preparation method, the energy consumption and the equipment cost of the carbon removal procedure are greatly reduced, the specific surface area and the densification performance of the subsequent high-purity quartz sand product can be guaranteed, and a technical path which is low in energy consumption, high in efficiency and capable of giving consideration to the product performance is provided for industrial preparation of the high-purity quartz sand through a sol-gel method.

The invention provides a nano-drug based on atomic layer deposition and a preparation method of the nano-drug, mesoporous silica is taken as a carrier, bimetallic nanoparticles are precisely deposited through ALD, and chemotherapeutic drugs and antibacterial components are loaded by combining amination and targeted PEG modification, so that the following functions are realized: (1) H2O2 in a tumor microenvironment is catalyzed to generate reactive oxygen species (ROS); removing fusobacterium nucleatum and damaging a biological membrane of the fusobacterium nucleatum; (2) GSH is consumed through Fenton reaction, and tumor drug resistance is reversed; and (3) the drug is released in pH response, and tumor cells are accurately killed. The invention further provides application of the nano-drug based on atomic layer deposition in treatment of related drug-resistant colorectal cancer induced by fusobacterium nucleatum, the process is controllable, the biocompatibility is excellent, the treatment effect on the drug-resistant colorectal cancer is remarkably improved, and the nano-drug has wide clinical application prospects.

Cerium oxide (CeO2) coated silica (SiO2) particles, optionally comprising the inorganic group-SO2X, and methods of making such particles. The addition of the cerium oxide (CeO2) coated silica (SiO2) particles to fluorinated polymers containing sulfonic acid functional groups increases their stability to free radical degradation when used in fuel cell applications or electrolytic applications.

The invention belongs to the field of reinforcing and toughening of high polymer materials, and particularly relates to spike-mesoporous silica nanospheres, a preparation method thereof and application of the spike-mesoporous silica nanospheres in reinforcing and toughening of high polymer materials. The method for synthesizing the spur-mesoporous silica nanosphere comprises the following basic steps: synthesizing a smooth-surface mesoporous silica nanosphere with low crosslinking degree through an oil-water two-phase reaction system, and inducing normal shrinkage of a pore wall by utilizing secondary deep crosslinking to form a rigid nano spur surface structure and maintain an original mesoporous structure. The spur-mesoporous silica nanosphere is good in monodispersity, high in particle size uniformity and adjustable in 50-100 nm, has center divergent mesopores, high in pore diameter uniformity and adjustable in 6-8 nm, the pore opening height of the surface of the sphere is open, and the spur height is adjustable in 3-5 nm. The material is suitable for reinforcing and toughening high polymer materials such as various elastomers and resins, can effectively overcome the problem of'toughness mutual exclusion ', and can achieve synergistic interaction with an existing mechanical property reinforcing system.

The invention discloses surface hydroxylation modified mesoporous SiO2, a preparation method of the surface hydroxylation modified mesoporous SiO2 and a SiO2-based solid amine adsorbent. The preparation method comprises the following steps: dispersing waste glass powder into a first alkali solution, and reacting under a heating condition to obtain a sodium silicate solution; the concentration of the first alkali solution is 20-30 g / L; introducing carbon dioxide into the sodium silicate solution to obtain mesoporous SiO2; dispersing the mesoporous SiO2 into a second alkali solution, and carrying out heating treatment, so as to obtain surface hydroxylation modified mesoporous SiO2; and the concentration of the second alkali solution is 0.2-3 g / L. The glass powder is subjected to silicon extraction in an alkali dissolution mode to obtain the Na2SiO3 solution, the silicon recovery rate of 92% can be achieved, the prepared surface hydroxylation modified mesoporous SiO2 can be used as a carrier, PEI is loaded through a physical dipping method, the SiO2-based solid amine CO2 adsorbent is prepared, and on the basis of maintaining the high CO2 adsorption capacity, the CO2 adsorption capacity is greatly improved. The long-term stability of the solid amine adsorbent in an O2-containing environment can be maintained, and the service life and the long-term cyclic adsorption performance of the solid amine adsorbent are greatly improved.

The invention relates to the technical field of synthetic quartz sand, in particular to an ultrapure synthetic quartz sand roasting device which comprises a temperature acquisition unit, a plurality of reaction temperature sensors arranged on the inner side of the furnace wall of a reaction furnace and used for acquiring the temperature of each temperature control area, and a gas temperature sensor, the data acquisition unit comprises a plurality of machine vision devices and a signal detection device, wherein the machine vision devices are used for acquiring the reaction time of each temperature control area; the data analysis unit is used for determining a plurality of same quartz sand roasting characteristic values as a quartz sand roasting characteristic value group, and calculating diffraction peak dispersion characteristic values to determine a target quartz sand roasting characteristic value; the data processing unit is used for judging whether the quartz sand raw material is uniformly dispersed in the reaction furnace; and the finished product detection unit calculates the temperature difference threshold value and the temperature deviation value of each temperature control area to judge whether the reaction furnace works normally or not. According to the method, the roasting accuracy of the ultra-pure synthetic quartz sand is remarkably improved.

The invention provides a method for quality-divided regeneration of silicon dioxide from ardealite by using a flotation and acid leaching coupling melting purification technology, and relates to the technical field of regeneration of silicon dioxide from ardealite, the method comprises the following steps: S1, adding a nonionic collecting agent into ardealite ore pulp for reverse flotation to obtain rough machining ardealite; s2, carrying out direct flotation on the rough machining ardealite obtained in the step S1 to obtain silicon ardealite tailings; s3, drying and crushing the silicon phosphogypsum tailings, uniformly mixing the silicon phosphogypsum tailings with a washing agent, and acidizing to remove impurities, so as to obtain silicate; and S4, adding the silicate obtained in the step S3 into a dissolving agent, reacting to obtain silicon dioxide colloid, and calcining to obtain silicon dioxide with the purity as high as 99.9%.

The invention relates to the technical field of quartz sand purification, in particular to a quartz sand impurity removal method based on multi-source data fusion, which comprises the following steps: carrying out on-line detection on preprocessed quartz sand particle flow to obtain data representing granularity and internal bubble abundance; the particle flow is intelligently sorted based on the data; different groups of materials are guided into an independent temperature control area of a rotary kiln, and a differential calcining process is applied; online detection and effect evaluation are carried out after calcination, and a differentiated acid leaching process is carried out on qualified and unqualified material groups according to the online detection and effect evaluation; and finally, comprehensive quality detection is carried out, and a circular treatment process is intelligently started according to reasons for substandard standards. By means of multi-source data fusion, dynamic regulation and control over the raw materials and core procedures are achieved, the purification efficiency and the product purity are remarkably improved, the adaptability of the technology to fluctuation of the raw materials is enhanced, meanwhile, acid liquor consumption and energy consumption are effectively reduced, and refined and intelligent green production is achieved.

The invention discloses a method for purifying high-purity quartz sand, which belongs to the technical field of preparation of high-purity quartz sand, and comprises the following steps: (1) sequentially carrying out high-pressure water jet scrubbing, gradient screening classification and dielectric separation on sandstone type quartz ore raw ore with SiO2 content of 85-90% to remove feldspar to obtain quartz particles with feldspar content of less than or equal to 2%; (2) sequentially carrying out microwave field pretreatment, infrared light field crack propagation and pulse laser implosion stripping on the quartz particles obtained in the step (1), and regulating and controlling technological parameters of the three fields through linkage of a PLC (Programmable Logic Controller) system, so that the stripping rate of an impurity inclusion is greater than or equal to 92%; according to the invention, aiming at quartz particles with different particle sizes, a plurality of process parameters are automatically optimized and adjusted through the PLC system, accurate control and adaptive production are realized, and high-purity products can be stably produced from sandstone type quartz raw materials with different grades in different regions. And the inclusion is opened from inside to outside through a multi-field synergistic effect, and the completeness of the quartz particles is retained to the greatest extent by combining with an optimized fluoride-free acid leaching condition.

The invention discloses a method for preparing high-purity quartz and recovering an iron element based on high-silicon tailings, and belongs to the technical field of comprehensive utilization of resources and preparation of high-purity quartz. According to the method, high-silicon tailings are sequentially subjected to mineral dissociation, low-magnetic-field roughing, high-magnetic-field scavenging, flotation and ultrasonic acid leaching treatment, and refined quartz is obtained; and carrying out multi-stage gradient chloridizing roasting and hot-pressing acid leaching treatment on the refined quartz of which the gas-liquid inclusion index and transparency meet the requirements to finally prepare the high-purity quartz of which the SiO2 purity is greater than or equal to 99.995%. In addition, for strong magnetic minerals generated in the magnetic separation process, the iron content of the strong magnetic minerals reaches the standard, the strong magnetic minerals react with the acid leaching filtrate under the ultrasonic strengthening condition to leach iron ions, and iron-rich filtrate is subjected to an iron precipitation reaction to generate iron carbonyl. The method provided by the invention not only provides a reliable judgment basis and a complete technical route for preparing high-purity quartz from the high-silicon tailings, but also opens up a new way for resource utilization of the tailings, and has remarkable industrial application value and environmental benefits.

The application provides a coal-based solid waste flotation-metallurgy-material resource comprehensive utilization process method and application, and belongs to the technical field of coal-based solid waste comprehensive utilization.The coal-based solid waste is first separated by flotation to obtain residual carbon and tail ash; then the tail ash is dried and alkali melted to become active material; then the active material is leached and filtered to obtain leaching liquid and leaching residue, and Li and Ga in the leaching liquid are adsorbed and enriched; the adsorbed leaching liquid is adjusted in silicon-aluminum ratio, hydrothermally crystallized, filtered and high-temperature calcined to obtain mesoporous molecular sieve; the filtered silicon-containing alkali liquor is carbonized and calcined to obtain white carbon black; the tail ash and the leaching residue are mixed, and through moisture adjustment and curing process, a geopolymer product is obtained.The method in the application does not produce waste residue and waste water in the implementation process, finally obtains four products of Li and Ga enrichment product, geopolymer product, mesoporous molecular sieve and white carbon black, realizes full and comprehensive utilization of the coal-based solid waste, and has good environmental benefits and great significance.

The invention relates to a method for efficiently and deeply removing impurities in a quartz sand inclusion, and belongs to the technical field of efficient preparation of high-purity quartz and fine and deep processing of non-metallic ores. The method comprises the following steps: mixing a quartz sand raw material with insulating liquid to form slurry; the slurry is subjected to N-stage high-voltage electric pulse treatment, and intermediate quartz sand is obtained; n is greater than or equal to 2 and is an integer, and the pulse voltage of the (N-1) th-stage high-voltage electric pulse processing is greater than the pulse voltage of the Nth-stage high-voltage electric pulse processing; the highest pulse voltage of the first-stage high-voltage electric pulse processing is not higher than 500kV, and the lowest pulse voltage of the Nth-stage high-voltage electric pulse processing is not lower than 50kV; and carrying out solid-liquid separation on the intermediate quartz sand, and carrying out acid leaching treatment on solids to obtain the high-purity quartz sand. According to the method disclosed by the invention, selective crushing of high-voltage electric pulses of more than two levels is creatively combined with a mild chemical acid leaching technology to construct an efficient synergistic process system, so that targeted deep removal of inclusion impurities in the quartz sand is realized.

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

The invention relates to the technical field of functional materials, in particular to phenolic aldehyde hybrid SiO2 mesoporous microspheres and application thereof. Mesopores with the pore diameter of 2-50 nm are formed in the surface and the interior of the phenolic aldehyde hybridized SiO2 mesoporous microsphere; the average diameter of the phenolic aldehyde hybrid SiO2 mesoporous microspheres is 10 to 100 microns; the phenolic hybrid SiO2 mesoporous microspheres can be applied to the fields of thermal protection, wave absorption, heat insulation and coatings. According to the phenolic hybrid SiO2 mesoporous microsphere disclosed by the invention, by virtue of a unique mesoporous structure and an organic-inorganic hybrid characteristic, excellent heat insulation performance and multifunctionality are realized, and meanwhile, the problems of insufficient protection performance, single function, poor processability, high cost and the like of an existing material are solved.

The invention relates to the technical field of functional antioxidants, in particular to a stability-enhanced antioxidant based on pterostilbene and a preparation method and application thereof. The pterostilbene tablet comprises the following components in percentage by weight: 10-30% of pterostilbene, 8-20% of Arabic gum, 5-15% of tocopheryl succinate, 1-5% of disodium ethylene diamine tetraacetate, 30-60% of beta-cyclodextrin, 2-8% of rosmarinic acid, 1-6% of chitosan quaternary ammonium salt, 0.5-3% of nano silicon dioxide and 2-7% of polyglycerol fatty acid ester. In the preparation process, beta-cyclodextrin and pterostilbene form an inclusion compound, the dispersity of nano silicon dioxide and chitosan quaternary ammonium salt is improved through hydrogen bonds, and tea polyphenol or ascorbyl palmitate can be added to enhance the synergistic effect. The antioxidant is high in stability, high in pterostilbene retention rate, uniform in dispersion, free of agglomeration, excellent in antioxidant activity, suitable for the fields of foods, cosmetics and medicines, simple in preparation process, low in consumption and suitable for industrial production.

The invention relates to a preparation method of quartz sand, and belongs to the technical field of quartz. The preparation method comprises the following steps: S1, adding a polyvinyl butyral solution into silica sol, and uniformly stirring to obtain silica sol dispersion liquid; the polyvinyl butyral solution comprises polyvinyl butyral (PVB) and tert-butyl alcohol; s2, performing spray drying on the silica sol dispersion liquid to obtain quartz microspheres; and S3, carrying out oxidation carbon removal treatment and vacuum dehydroxylation treatment on the quartz microspheres to obtain the quartz sand. Drying cracking and micro-hollow structure defects of the quartz sand can be effectively eliminated, it is ensured that the product is compact and free of pores, and the structural integrity and the use reliability are greatly improved; the density performance bottleneck of quartz sand is successfully broken through, and the bulk density after sintering is remarkably improved; the particle size distribution of the quartz sand can be accurately controlled, and the product particle size uniformity is ensured.

The application provides a wear-resistant transparent flexible fluorine-free super-hydrophobic composite coating and a preparation method thereof. The preparation method comprises the following steps: mixing and reacting hydroxyl-terminated polydimethylsiloxane, gamma-aminopropyl triethoxysilane and dibutyl tin dilaurate to obtain a modified precursor solution, adding swelled epoxy resin into the modified precursor solution, and obtaining a siloxane modified epoxy resin after heating reaction; dispersing nano-silicon dioxide in an ethyl acetate solution to form a SiO2 suspension; uniformly mixing the modified epoxy resin and the SiO2 suspension, adding polyether amine as a curing agent, and stirring and mixing, and then adopting an air spraying mode to build an epoxy resin / hydroxyl-terminated polydimethylsiloxane / nano-silicon dioxide super-hydrophobic coating on a substrate. The preparation method can prepare a super-hydrophobic coating with excellent transparency and flexibility, good adhesion and wear resistance, and has a wide application prospect in the fields of wearable electronic devices and optoelectronic devices.

The invention provides a method and a system for strengthening sludge treatment and nanometer material co-production through synergy of electrochemistry and ozone catalysis, and application of the method and the system, and relates to the technical field of environmental governance and resource recovery, in particular to the method for strengthening sludge treatment and nanometer material co-production through synergy of electrochemistry and ozone catalysis. Comprising the following steps: (a) performing electrochemical catalytic oxidation treatment on sludge slurry; (b) pyrolyzing the sludge treated in the step (a) to obtain volatile components; and (c) converting the volatile component into nano silicon dioxide through a vapor deposition reaction. According to the electrochemical-ozone catalysis synergistic enhanced sludge treatment and nano material co-production method provided by the invention, electrochemical catalytic oxidation, pyrolysis and vapor deposition processes are organically integrated, so that efficient removal of pollutants in sludge and synchronous conversion of high-value nano materials are realized.

A process for producing solar grade silicon from silica sand employs a plurality of plasma furnaces to perform a sequence of chemical reactions together with other process steps to produce solar grade silicon. The plasma furnace generates a stable dirty-air, donut-shaped plasma into which particulate matter can be introduced. The plasma in the first two stages is formed by gases from the chemical reactions and in the third from inert gasses. Cyclone separators are used to extract particulates from the plasma in an inert gas that prevents reverse reactions as the particulate cools.

The invention discloses a rinsing process for deep cleaning of purified natural quartz, which comprises the following steps: putting acid-washed quartz sand into a cleaning medium tank containing a mixed cleaning solution of deionized water and absolute ethyl alcohol for cleaning, and applying ultrasonic waves in the cleaning process; the cleaned quartz sand is put into a cleaning medium tank containing a mixed cleaning solution composed of deionized water, hydrogen peroxide and hydrofluoric acid to be cleaned, and ultrasonic waves are applied in the cleaning process; and the cleaned quartz sand is put into a cleaning medium tank containing deionized water to be rinsed so as to remove acid pickling residues to achieve deep cleaning, and ultrasonic waves are applied in the cleaning process. According to the method, a three-step cleaning scheme is innovatively adopted, so that loose impurities on the surfaces of quartz sand particles and organic reagent residues of a flotation process are efficiently stripped; the three steps are clear in function and have a synergistic effect, and the cleaning effect is far better than that of traditional single washing.

The present invention provides a modified silica aerogel powder having a higher water repellency and a larger contact angle, and a method for producing the same. At the same time, the present invention provides an aerogel slurry having a lower thermal conductivity and a method for producing the same. The present invention also provides a method for producing an aerogel insulating felt having low thermal conductivity, high mechanical strength, and capable of relatively well resolving the problem of powder shedding. The method for producing the modified silica aerogel powder includes the steps of (1) modifying halloysite nanotubes with dodecyl methacrylate and pentafluorophenyl methacrylate, (2) preparing a silica sol, (3) adding the modified halloysite nanotubes to the silica sol to prepare a wet gel, and (5) preparing the wet gel into the modified silica aerogel powder. The present application also provides a method for producing an aerogel slurry from the modified silica aerogel powder, and a method for producing an aerogel insulating felt from the aerogel slurry.

To provide a technique for forming a monolayer of silicon oxide with sp2 hybrid orbitals.SOLUTION: The silicon oxide is synthesized by forming an emulsion of tetraalkylsilane and an aqueous component together with a surfactant, hydrolyzing the emulsion, and drying the emulsion at low temperature.SELECTED DRAWING: Figure 2

The invention relates to the technical field of quartz sand purification, in particular to a high-purity quartz sand purification method based on multi-parameter fusion, which comprises the following steps: judging whether to enter first flotation purification or not based on a comparison result of a particle size index numerical value corresponding to a particle mixture to be purified and a particle size index threshold value, and if not, starting second crushing; determining a first impurity removal rate according to the data set after the first flotation if the first impurity removal rate is judged to enter, and comparing the first impurity removal rate with a first impurity removal threshold value so as to judge whether the first pickling purification is entered or not; if not, secondary flotation purification is started; and if it is judged that the process enters, determining a second impurity removal rate according to the data set after the first pickling, and comparing the second impurity removal rate with a second impurity removal threshold to judge whether purification is completed or not, and if the purification is not completed, starting second pickling purification. The quartz sand purification process can be dynamically judged and precisely regulated and controlled, and the purification efficiency of the high-purity quartz sand is effectively improved.

The application discloses a kind of hydrophobic anticorrosive coating and preparation method thereof, belong to anticorrosive coating preparation technical field.The above-mentioned method includes: step 1: preparation of nanometer silicon dioxide;Step 2: kaolin powder, acrylic resin, nanometer silicon dioxide are added to ethyl acetate, after ultrasonic dispersion, magnetic stirring is carried out at room temperature, and pre-solidification mixed solution is obtained;The mass ratio of the kaolin powder, acrylic resin, nanometer silicon dioxide is 1:0.66:0.05;Step 3: pre-solidification mixed solution is drop-coated on substrate, and solidification is carried out, to obtain hydrophobic anticorrosive coating.The application selects kaolin and acrylic resin to prepare film, and specific particle size kaolin can reduce the pore of film as far as possible, then the added modified nanometer silicon dioxide is further filled in the pore, so that the prepared coating has better hydrophobic anticorrosive effect.

The invention belongs to the field of inorganic chemical industry, and particularly relates to a method and a system for efficiently utilizing a phosphate fertilizer byproduct, the method comprises the following steps: carrying out acidolysis on fluosilicic acid with the concentration of more than or equal to 45% wt and concentrated sulfuric acid to generate a mixed solution of silicon tetrafluoride gas and fluorosulfonic acid; the mass ratio of the fluosilicic acid to the concentrated sulfuric acid is controlled to be 1: (4-15); pyrolyzing the obtained fluorosulfonic acid to generate dilute sulphuric acid, hydrogen fluoride and water vapor, forming 98% concentrated sulphuric acid from part of dilute sulphuric acid and fuming sulphuric acid, drying hydrogen fluoride to obtain crude hydrogen fluoride gas, and condensing and rectifying to obtain anhydrous hydrogen fluoride; the rest dilute sulphuric acid is partially compounded and then returned for acidolysis, and the rest dilute sulphuric acid is used for producing white carbon black and flows back to a wet-process phosphoric acid system; and circularly absorbing the obtained silicon tetrafluoride gas by using secondary concentrated fluosilicic acid to obtain fluosilicic acid with the mass concentration of more than or equal to 45%, recycling the fluosilicic acid for acidolysis reaction, and modifying the concentrated by-product silicon dioxide to obtain the high-activity white carbon black. The problems of energy consumption and cost are solved, and efficient circulation and poly-generation of fluorine and silicon resources are achieved in the whole process.

The invention discloses a roasting device and method for preparing densified high-purity synthetic quartz sand, and belongs to the technical field of quartz sand production. A conventional silicon source is used as an initial raw material, a synthetic quartz sand precursor is prepared through an elaborately designed purification and gelation process method, then sintering and further purification treatment are carried out by means of special equipment, and finally the high-quality synthetic quartz sand with closed pores, low hydroxyl content and high purity is obtained. The technological method innovatively solves the common problems of many bubble inclusions, too high hydroxyl content, uneven structure and the like of amorphous quartz sand in the prior art, so that the service life, hardness and temperature resistance of the synthetic quartz sand are remarkably prolonged, and more reliable material selection is provided for the high-end application field.

The invention relates to the technical field of purification, and discloses quartz ore impurity removal and purification equipment and a method thereof, and the quartz ore impurity removal and purification equipment comprises a reaction kettle shell. The vortex-shaped linear guide rail is accurately matched with the push rod, the lower surface of the vortex-shaped linear guide rail is provided with an inclined surface, when the positioning column rotates, the top of the push rod is slidably connected with the bottom of the lifting arm, and jacking force pushes the lifting arm to turn upwards and drives the top plate to move upwards to extrude a catalyst in the temporary storage cavity; the lifting distance of the outer push rod is larger than that of the inner side, the movement amount of the corresponding outer top plate is larger, the feeding amount is synchronously increased, and the outer linear speed is larger than that of the inner side when the distribution frame rotates, so that the density of catalysts in all areas in the reaction kettle is consistent, and excessive or insufficient local reaction is avoided; therefore, the problem of reaction efficiency difference caused by non-uniform feeding of traditional equipment is solved, the reaction uniformity in the quartz ore purification process is effectively improved, and the purity of a final product is ensured to stably reach the standard.