130 results about "Silicate minerals" patented technology

The invention relates to a high-strength stable solid waste-based composite cementing material and a preparation method and application thereof in the field of building materials. The high-strength stable solid waste-based composite cementing material is prepared from the following raw materials in parts by weight: 70-85 parts of composite solid waste micro powder; 10 to 20 parts of Portland cement clinker; 3-8 parts of a composite activator; 0.5 to 2 parts of a nano-scale function regulator; wherein the composite solid waste micro powder is prepared by mixing and grinding the following raw materials in parts by weight: 40-60 parts of blast furnace slag powder; 20 to 30 parts of fly ash; 10-20 parts of chemically modified electrolytic manganese residue powder; and 5-15 parts of steel slag powder. According to the preparation method, sodium metasilicate is adopted to assist medium-temperature calcination to chemically modify the electrolytic manganese residues, so that not only is the gelation activity of the electrolytic manganese residues effectively excited, but also free-state manganese, cadmium and other heavy metal ions in the electrolytic manganese residues are fixed in situ in newly formed zeolite-like silicate mineral lattices through thermochemical reconstruction; and a brand new technical path is opened up for safe and high-value utilization of the typical hazardous waste, namely the electrolytic manganese residues.

The invention provides a mixed type shield synchronous grouting material and a grouting process, and relates to the technical field of building materials, the grouting material is composed of fast hydration Portland cement, activated aluminosilicate minerals, nanometer silicon powder, bentonite, a reversible thixotropic polymer, a delayed hydration agent, coated calcium aluminate fast setting powder and a coated silicate gel precursor. The early-stage reaction is inhibited by delaying hydration, and a controllable solidification sequence of slurry from a flowable stage, a rearrangement structure stage to a rapid solidification stage is realized by breaking a membrane under the action of temperature or pressure gradient. In the process, by monitoring the conductivity, the concentration of Ca < 2 + > / Mg < 2 + > and the temperature in real time, the adding amount of an additive and grouting parameters are automatically adjusted, so that the stable diffusivity of the material is kept and the curing speed is accelerated under different stratum conditions. The solidified body forms a C-S-H, C-A-S-H and N-A-S-H gel interpenetrating network, the permeability coefficient is low, the water dispersion resistance is high, and the shield grouting quality and the tunnel structure safety can be remarkably improved.

The invention discloses a fracturing imbibition system for refracturing a low-permeability tight oil reservoir and a preparation method of the fracturing imbibition system, and belongs to the technical field of fracturing fluids, the fracturing imbibition system comprises: an acid liquid base fluid: hydrochloric acid, hydrofluoric acid, EDTMPS and deionized water; an amphoteric betaine viscoelastic surfactant; biologically modifying the nanoparticles; a Gemini cationic surface active agent; a corrosion inhibitor; and an organic silicon defoaming agent and a fluorocarbon discharge aiding agent. According to the fracturing imbibition system, through the integrated design of the multifunctional surfactant, the problems that a traditional acid fracturing fluid is insufficient in silicate mineral dissolving capacity, high-temperature viscosity is attenuated, and corrosion inhibitor dependence is caused are solved.

The present invention provides an eco-friendly, biodegradable, controlled-release pesticidal composition, comprising particular essential oils acting in synergy, adsorbed onto a silicate mineral carrier and embedded within a polysaccharide matrix, which is effective in suppressing nematode populations and enhancing plant health and growth, and methods of use.

The application discloses a kind of multi-element combination collector and its application in low-grade lepidolite flotation, belong to mineral processing technical field.The multi-element combination collector provided by the application is composed of cationic amine collector, anionic promoter and long-chain anionic collector, which significantly improves the reaction activity of the collector and the capture behavior of the mineral particles during the flotation process, reduces the foam viscosity and increases the fluidity, effectively solves the problem of overstable foam and the difficulty of flotation separation of different silicate minerals under acidic conditions, reduces environmental pollution and equipment corrosion, and also strengthens the hydrophobic floating behavior of lepidolite surface, resulting in high grade Li2O concentrate, further realizing the clean recycling of low-grade lepidolite resources.

The invention discloses a method for synthesizing a high-crystallinity zeolite molecular sieve through in-situ crystallization of aluminosilicate minerals, and belongs to the technical field of zeolite molecular sieve synthesis. The preparation method comprises the following steps: preparing a crystal nucleus liquid containing zeolite molecular sieve microcrystals and a solid-phase wafer; mixing aluminosilicate minerals with the crystal nucleus liquid, and respectively roasting at 850-1000 DEG C and 650-800 DEG C to prepare an active mineral silicon source and an active mineral aluminum source; and mixing the active mineral source with additional silicon species, NaOH, a template agent, a crystal nucleus liquid, a solid-phase wafer and water, crystallizing at 90-150 DEG C, and post-processing to obtain the high-crystallinity zeolite molecular sieve. By introducing the crystal nucleus liquid and the solid-phase wafer, silicon and aluminum components in the aluminosilicate mineral are promoted to be converted into the target molecular sieve in situ, the crystallinity of the product is remarkably improved, the synthesis cost is reduced, and the method is suitable for the fields of petrochemical engineering, environmental protection and the like.

The invention relates to the technical field of water treatment, in particular to a magnetic biological flocculant, a preparation method of the magnetic biological flocculant and application of the magnetic biological flocculant in retention of emerging pollutants. According to the magnetic biological flocculant provided by the invention, an initial oxygen mineral on the earth is used as a body nano mineral, a binary wet ball milling method is adopted to prepare a sub-nano mixed mineral, then the sub-nano mixed mineral is subjected to ultrasonic treatment and solid-liquid separation, and then reduction roasting is performed to obtain a sub-nano zero-valent complex mineral; then, mixing the sub-nanometer zero-valent complex minerals with silicate minerals and lotus leaf powder, and embedding by using marine animal mucus, so as to prepare the magnetic biological flocculant. The surface of the magnetic biological flocculant is rich in a large number of hydroxyl functional groups, the reaction activity is high, marine animal mucus can be effectively prevented from going bad, and efficient retention of emerging pollutants is achieved. In addition, the magnetic biological flocculant is non-toxic and harmless, and the potential risk to the environment is eliminated.

The application discloses a method for separating aluminosilicate minerals and purifying quartz sand under neutral conditions and application thereof. The method for separating aluminosilicate minerals and purifying quartz sand under neutral conditions adopts one or more times of reverse flotation operations, and the reverse flotation operation comprises the following steps: adding a quartz depressor into quartz raw sand slurry or low-aluminum-content fine quartz sand slurry obtained through previous reverse flotation operation and mixing; then adding an aluminosilicate mineral collector and mixing; subsequently, adding a foaming agent under the condition of air agitation and stirring, and performing quartz reverse flotation, during which, stirring is kept and bubbles are scraped; and finally, washing the remaining slurry to obtain low-aluminum-content fine quartz sand. The reverse flotation process of the application is performed under neutral conditions, avoids the use of traditional strong acid and strong alkali, and further reduces the harm of the purification process to production equipment, ecological environment and operating personnel.

The application provides a preparation method of a two-dimensional layered silicate mineral film treated by a reducing modifier, which comprises the following steps: firstly, organic modification of a two-dimensional layered silicate mineral by a reducing ionic liquid; then, loading of the reducing modifier into the interlayer of the two-dimensional layered silicate mineral; and finally, construction of a two-dimensional channel by vacuum filtration to prepare a film with a thickness of 5-20 microns. The two-dimensional layered silicate mineral film obtained by the method has a large surface area and can effectively treat heavy metal Cr(VI). The construction of the two-dimensional channel provides a limited space for the reducing modifier to prevent oxidation and provides abundant sites for the oxidation-reduction reaction in the nanopore channel, and solves the problems of desorption difficulty and secondary pollution caused by the traditional adsorption method for treating heavy metals.

The invention discloses a method for recovering fine-crushed gold-loaded resin from gold ore leaching residues, and belongs to the technical field of mineral processing. The invention provides an efficient recovery method aiming at the problem of resource waste caused by loss of fine-crushed gold-loaded resin along with leaching residues in the gold extraction process of a resin ore pulp method. The gold ore tailings mainly comprise silicate minerals such as quartz, feldspar and mica, the granularity is fine, and the viscosity of ore pulp is high. The method comprises the following steps: carrying out size mixing and dispersion pretreatment on the tailings containing the fine-crushed gold-loaded resin; gold-bearing resin rough concentrate is obtained through screening and grading; the rough concentrate is subjected to desliming pretreatment; the deslimed materials are subjected to dense medium separation and concentration, and efficient separation is achieved through the density difference between resin and gangue minerals; and finally, the obtained gold-bearing resin concentrate is subjected to medium drainage washing. The sorting technology adopted by the invention has the advantages of high separation precision, strong adaptability and the like, can realize efficient recovery of fine-crushed gold-loaded resin from a complex tailing system, and has remarkable economic benefits and environmental benefits.

The invention discloses a composite sensing material as well as preparation and application thereof in liquid food spoilage monitoring. The material is of a metal oxide semiconductor / layered silicate mineral and wax integrated structure, and comprises a heterojunction sensitive layer formed by compounding metal oxide semiconductor nanoparticles and layered silicate minerals, and a wax super-hydrophobic protective layer coating the surface of the heterojunction sensitive layer. The preparation method comprises the following steps: dispersing the two raw materials into suspension liquid, coating the suspension liquid on an electrode to form the sensitive layer, and then coating and curing the wax material to form the protective layer. According to the material, the room-temperature gas-sensitive activity is enhanced through the heterojunction, meanwhile, the super-hydrophobic wax layer is used for resisting high humidity and liquid pollution, and function synergy is achieved. The obtained material is high in sensitivity and quick in response to decay mark gases such as ammonia gas and hydrogen sulfide at room temperature, and has excellent environmental interference resistance. The method is simple in process, low in cost, high in environmental adaptability, capable of being integrated in liquid food packaging, capable of achieving real-time in-situ monitoring of the decay process and wide in application prospect.

A copolyester composition comprising a metal phosphinate flame retardant, an acrylic silicone impact modifier, and a silicate mineral, which provides high tensile and / or flexural modulus while maintaining thermal and impact properties and having improved flame retardant properties, a method for manufacturing the copolyester composition, and an article manufactured from the copolyester composition are provided.

The invention discloses an efficient deionizing neutralizer for strongly acidic pickling wastewater and a preparation method of the efficient deionizing neutralizer, and belongs to the technical field of industrial wastewater treatment. The neutralizer is prepared by carrying out pure physical crushing, grinding, screening and compounding on magnesium silicate minerals, aluminum clay minerals and siliceous inert minerals, is white powder, has the density of 1.15-1.25 g / cm < 3 >, is not dissolved, not hydrolyzed and not reacted with water in pure water, is only subjected to directional proton consumption reaction with H under the strongly acidic condition with the pH value of 0-3, and can be used for preparing a high-purity high-purity high-purity magnesium oxide. After the pH value of the wastewater is rapidly increased to 4-5, the device is automatically stopped. The whole process of the preparation method is physical processing, high-temperature calcination is avoided, and chemical modification is avoided. The method provided by the invention solves the problems of scaling, large sludge amount and difficult pH control of the traditional neutralizer, has the advantages of greenness, environmental protection, safety, easy operation and low cost, and is suitable for strong acid pickling wastewater treatment in steel, electroplating and metal processing industries.

The invention relates to the technical field of silicon carbide ceramics, in particular to an in-situ induced low-temperature eutectic silicon carbide porous ceramic and a preparation method thereof. The material is prepared by mixing and sintering the following materials: silicon carbide, a synergistic sintering system, a dispersing agent, a plasticizer and water, wherein the synergistic sintering system comprises the following components: pregelatinized starch, a silicate mineral material, aluminum oxide, calcium carbonate, glass powder and rare earth oxide; the pregelatinized starch is adopted as an adhesive, the thermal decomposition behavior of the pregelatinized starch and the chemical reaction activity of the glass powder and the calcium carbonate form synergy in the process, seamless connection of the whole process from the room temperature to the sintering temperature is achieved, the sintering temperature is greatly reduced, meanwhile, the glue discharging step is omitted, and the silicon carbide porous ceramic product with good performance and few defects is obtained.

The present invention provides a method (600a) and apparatus for producing an alkaline mixture comprising sodium silicate, which mixture is suitable for use as an alkaline activator for alkaline activated and geopolymer cements, but which may also be used, for example, to mineralize captured carbon dioxide. The method comprises comminuting (301) an ore of a target metal into fines, wherein the ore comprises a siliceous mineral and at least one of iron and manganese as the target metal. The siliceous mineral may comprise the target metal itself and / or it may be silica and / or another silicate mineral present as gangue. The ore is dehydrated and hydroxylated compounds contained therein are dehydroxylated (302). The ore thus treated is then reacted (601) in an inert atmosphere with an amount of liquid sodium in excess of the stoichiometric amount thereof required for a redox reaction between the liquid sodium and an oxide of the target metal from the ore, to precipitate out from the liquid sodium a solid phase comprising both the target metal in elemental form and other insoluble products comprising sodium oxide. The redox reaction is conducted at a temperature of at least 320 °Celsius to induce a reaction between the sodium oxide and silica derived from the siliceous mineral to produce sodium silicate, but also below a temperature at which the liquid sodium can react with the oxide of the target metal to produce a ternary oxide thereof. At least some of the liquid sodium having sodium silicate dissolved therein is then separated (305) from the solid phase and is reacted (602) with at least one of oxygen and water to produce a mixture comprising sodium silicate and at least one of sodium oxide and sodium hydroxide. The corresponding apparatus comprises a comminution device (such as a rock crusher or grinder), means for dehydrating and dehydroxylating the ore (such as a dryer), a gas-tight first reaction vessel for reacting the ore thus treated with the liquid sodium, a solid-liquid sodium phase separator, and a second reaction vessel for reacting the liquid sodium having sodium silicate dissolved therein with at least one of oxygen and water. The resulting alkaline mixture is therefore produced whilst extracting the target metal in elemental form from its ore. Thus the energy consumed is split between the production of these two co-products, making the method of the invention a low-energy method of producing an alkaline activator for alkaline activated and geopolymer cements. Both reactions (601, 602) are also significantly exothermic and at least some of the thermal energy from them may be recycled. The invention does not consume any carbon and is therefore at least carbon-neutral. On the other hand, it consumes the silica content of gangue mineral species and / or of siliceous minerals of the target metal in its ore, which have previously been treated as waste products. The amount of waste material produced when extracting the target metal from its ore is thereby reduced as well.

The present invention relates to the technical field of agricultural fertilizers, and specifically discloses a magnesium-aluminum silicate mineral-derived layered magnesium-aluminum bimetallic oxide-silicon oxide composite material, a preparation method, and its application. The present invention adopts the process of calcination-acid leaching-coprecipitation-hydrothermal-calcination to successfully convert magnesium / aluminum silicate minerals into layered magnesium-aluminum bimetallic oxide-silicon oxide composite materials with a high specific surface area and a developed pore structure. The layered magnesium-aluminum bimetallic oxide-silicon oxide composite material is combined with nutrients through a simple fertilizer production process to produce a slow-release fertilizer. The present invention has many advantages, such as cheap and easily available raw materials, a simple and efficient preparation process, stable fertilizer slow-release performance, and a soil improvement effect. It provides a new, efficient and environmentally friendly approach for the development of slow-release fertilizers, and is of great significance for promoting sustainable agricultural development and realizing the high-value utilization of silicate minerals in the agricultural field.

A method for dyeing textiles, the method comprising: wetting (201) a textile with an aqueous solution or dispersion of a compound which comprises an inorganic pigment and a silicate mineral which is a phyllosilicate or a zeolite, and wherein said inorganic pigment is or comprises a mineral; the textile remaining (202) wet for a period of time; washing (203) the textile; and drying (204) the textile. Also, a textile dyed using said method.

The present invention pertains to an oil-in-water type pest repellent composition containing the following components (A)-(E): (A) 13-50 mass% inclusive of one or more non-volatile liquid oily components selected from the group consisting of silicone oils, ester oils, ether oils, hydrocarbon oils, aliphatic alcohols, and polyols; (B) 0.5-35 mass% inclusive of hydrophilic inorganic particles containing silica particles and / or silicate mineral particles and having a volume median diameter of 1-40 [mu] m inclusive; (C) 0.1% by mass or more and 3% by mass or less of one or more substances selected from the group consisting of polyether-modified silicones, polyglycerol-modified silicones, branched polyglycerol-modified silicones, alkyl glyceryl ether-modified silicones, and carboxyl-modified silicones, which are liquid at 25 DEG C; (D) 0.05% by mass or more and 3% by mass or less of a tackifier; and (E) 30 to 86.35 mass% inclusive of water, the viscosity of the component (A) at 23 DEG C as determined by a B-type rotational viscometer being 1 to 400 mPa.s inclusive, and the silicone oil of the component (A) does not contain the component (C).

The present disclosure provides a Paenibacillus mucilaginosus LT1906 and use thereof, and a microorganism-activated circulating fluidized bed (CFB) fly ash-based cementitious material and a preparation method and use thereof, belonging to the technical field of cementitious materials. The Paenibacillus mucilaginosus LT1906 has a deposit number of CGMCC No. 21337. The strain is capable of dissolving silicate minerals and aluminosilicate minerals in the CFB fly ash to increase dissolution of active SiO2. The strain is used for activating the CFB fly ash-based cementitious material, to ameliorate a large water demand and a low early strength of the cementitious material, thereby improving comprehensive utilization of the CFB fly ash in the field of building materials.

This invention discloses a method for pretreatment and resource utilization of water-washed electrolytic manganese slag filter cake. The steps are as follows: pre-dispersing the water-washed electrolytic manganese slag filter cake, followed by adding alkaline materials in two stages to further disperse the filter cake and simultaneously remove residual NH4 from the water-washed electrolytic manganese slag. + The removal of soluble harmful ions and the stabilization and solidification, followed by ball milling and calcination after aging, further activate the deammonium-washed electrolytic manganese slag, which can be used to prepare mineral admixtures or cement mortar. This invention effectively reduces the particle size of the material, increases its specific surface area, and lowers the surface binding energy between elements such as Al, Si, and Ca and O in the crystal structure through mechanical activation technology, causing the silicate minerals and quartz crystals in the material to transform into an amorphous state, thereby enhancing the pozzolanic activity of the material. Thermal activation technology promotes the dehydration, dehydroxylation, decomposition reactions, or crystal transformation of the silicate minerals in the material, thereby enhancing its pozzolanic activity.

The invention relates to talaromyces pseudomonas hzt-3'as well as a preparation method and application of the talaromyces pseudomonas hzt-3 ', and belongs to the technical field of application of microorganisms. The strain is preserved in the China Center for Type Culture Collection, the preservation number of the strain is CCTCC NO: M 20251797, and the strain is classified and named as (Talaromyces pseudomonas hzt-3 '). The method comprises the following steps: collecting moss and vegetation soil samples from basalt, diabase and dolomite; diluting bacterial colonies in the sample, and separating and purifying the bacterial strains by using a Czapek culture medium; anorthite and serpentine are used as inorganic salt sources for strain screening, and strains which grow stably and have a good leaching effect on calcium magnesium silicate minerals are obtained; the strain is applied to efficient leaching of anorthite, serpentine and wollastonite, and compared with a sterile control group, the effect of improving the leaching rate of calcium and magnesium ions is remarkable. The method solves the problem that the reaction rate of mineral sequestration carbon dioxide is slow due to the fact that ions in natural silicate minerals are difficult to leach, and has great significance.

The invention discloses a fluxing agent for replacing fluorite in iron and steel smelting and a manufacturing method thereof, and belongs to the field of iron and steel smelting. The fluxing agent for replacing fluorite is prepared by taking nepheline syenite containing various silicate minerals as a main material, crushing, adding a mixture taking bentonite and starch as a binder, adding water, uniformly mixing, then pressing into pellets with the diameter of 30-40mm by a machine, and airing and drying for use. Wherein the binder accounts for 3-5% by weight, is the same as fluorite, has the effects of reducing the melting point and apparent viscosity of the slag, improving the fluidity of the slag and reducing the iron loss of the slag, and can increase the alkalinity of molten steel and improve the quality of the molten steel. The ingredients overcome the defects of fluorite in iron and steel smelting, corrosion to a furnace lining of a melting furnace can be reduced, the health of workers is not harmed, pollution of slag to the environment can be reduced, and the post-treatment process of the slag is simplified, so that the treatment cost of the slag is reduced.

The embodiment of the invention relates to the technical field of organic fertilizers, and provides a biochar-based composite organic fertilizer for improving a soil structure and a preparation method of the biochar-based composite organic fertilizer. The biochar-based composite organic fertilizer comprises 30-50% of biochar, 5-10% of a microbial agent, 20-30% of crop straw powder, 3-5% of ammonium sulfate, 5-8% of silicate mineral powder and 0.2-0.5% of zinc sulfate borax, the biochar-based composite organic fertilizer for improving the soil structure is used for loess high slope soil, the soil organic matter increase amplitude reaches three times that of a conventional organic fertilizer, the corrosion resistance index is reduced by 50%, and the soil structure is improved. Through the synergistic effect of the biochar, the microbial agent and the mineral powder, the soil organic matter and corrosion resistance are remarkably improved.

This invention relates to the fields of adsorbent preparation and heavy metal remediation technology, and particularly to an amorphous iron-magnesium-aluminum silicate, its preparation method, and its applications. This invention utilizes molten salt-mediated ion exchange and lattice recombination under high-temperature conditions to completely and uniformly transform various silicate minerals from complex and inconsistent natural clay minerals into a non-naturally formed, structurally homogeneous, and stable amorphous iron-magnesium-aluminum silicate. This overcomes the limitation of traditional adsorbents having a narrow applicable concentration range, exhibiting extremely strong removal capabilities for heavy metal ions from high to low concentrations, achieving deep purification. Based on the theory of "increasing configurational entropy," this invention proposes the design of a silicate network framework with dense, highly active sites and multiple metals, breaking through the traditional approach of "simple modification" of natural clay minerals. It fundamentally reconstructs their material composition, providing a material that combines low cost with revolutionary adsorption performance.

The invention relates to the technical field of rice planting, in particular to a cultivation method for relieving machine-transplanted rice seedling leaf withering, which comprises the following steps: uniformly mixing treated seeds with nano-porous silicate minerals, sowing in a seedling raising matrix, and spraying a composite biological agent in a one-leaf one-core period and a two-leaf one-core period of the seedlings and 1-3 days before rice transplanting in sequence. When the composite biological agent is used for rice cultivation, rice seedlings can be stimulated to generate cold-resistant and dry-resistant molecular products, silicon is promoted to gather on leaf surfaces to form siliceous layers, the dehydration resistance of the seedlings is enhanced, water evaporation of the seedlings after mechanical transplanting is reduced, leaves are prevented from being withered, and the seedlings are promoted to turn green early.

The invention discloses a method for efficient flotation development and utilization of columbite, and belongs to the technical field of mineral separation. The method comprises the following steps: carrying out ore grinding, reselection desliming on a table concentrator, removal of strong magnetic gangue minerals by low intensity magnetic separation and removal of silicate minerals by high intensity magnetic separation on columbiobite ores, carrying out size mixing on obtained magnetic separation concentrates, and carrying out columbiobite reinforced flotation by adopting a columbiobite collecting agent and a silicate mineral inhibitor to obtain columbiobite rough concentrates; and the columbiobite rough concentrate is subjected to size mixing till the pH value is 4.2 or below, a fatty amine collecting agent is adopted, columbiobite fine flotation is conducted, and columbiobite concentrate is obtained. According to the method, the flotation efficiency of the ferroniobium minerals can be remarkably improved, interference of gangue minerals is reduced, high recovery rate and high grade of the ferroniobium concentrate are ensured, particularly, the method has remarkable technical advantages in treatment of low-grade ferroniobium minerals, and a feasible technical route is provided for reasonable development of niobium resources.

The application discloses a method for extracting lithium from lithium-containing silicate minerals and by-product porous nanosilica, and the method comprises the following steps: (1) mixing the lithium-containing silicate minerals with a first metal inorganic salt, and ball milling the mixture; (2) performing acid activation on the ball-milling product and an acid solution under high-temperature and pressurized conditions, and performing solid-liquid separation to obtain an acid leaching solution and a first solid; obtaining porous nanosilica from the first solid; (3) mixing the acid leaching solution with any one or more than two of a second metal inorganic salt, a metal oxide and a natural mineral, adding the mixture into a container containing water, stirring and controlling pH, and stirring for a time under temperature rising, and then aging, inducing crystallization of metal ions in the acid leaching solution, and performing solid-liquid separation to obtain a lithium-rich solution and a second solid; and (4) obtaining a layered double hydroxide from the second solid. According to the method, lithium and other metal ions can be separated from the lithium-containing silicate minerals simultaneously, the lithium extraction rate is high, and the elements contained in the lithium-containing silicate minerals can be extracted and fully utilized.

The utility model discloses a colloidal silicate mineral continuous drying device which comprises a main box body used for drying, a feeding pipe is fixedly connected to the circumferential face of the main box body, a main filter screen is fixedly connected to the circumferential face of the main box body, a lower grinding disc is fixedly connected to the inner bottom face of the main box body, and an upper grinding disc is fixedly connected to the inner bottom face of the lower grinding disc. An upper millstone is arranged above the lower millstone, a plurality of electric hydraulic rods are fixedly connected to the top of the upper millstone and are uniformly distributed at the top of the upper millstone, and a top plate is fixedly connected to the tops of the electric hydraulic rods. By arranging the main box body, the feeding pipe, the main filter screen, the lower millstone, the upper millstone, an electric hydraulic rod, a top plate, a connecting shaft and a main motor, in the drying process, the electric hydraulic rod can be started to enable the upper millstone to be combined with the lower millstone, the main motor is started to enable the upper millstone to rotate, and therefore large colloidal silicate minerals are crushed, and the drying efficiency is improved.

The application belongs to the technical field of foundry coating, and particularly discloses an anti-crack sand mold foundry coating and a preparation method thereof. The coating comprises the following raw materials in mass fractions: brown corundum powder 900-1100 parts, calcined kaolin 100-200 parts, silica sol 430-530 parts, magnesium-bearing silicate mineral composite fiber 80-100 parts, composite microspheres 20-25 parts, organic rheological agent 1-3 parts, wetting agent 2-4 parts, defoaming agent 1-3 parts and deionized water 200-300 parts. The application constructs a dynamic self-adaptive coating system with normal-temperature stability, medium-temperature buffering and high-temperature anchoring: the composite microspheres soften to form a glassy liquid film at a medium-temperature range, absorb thermal stress and heal micro-cracks; the magnesium-bearing silicate mineral composite fiber releases magnesium oxide at high temperature, reacts with aggregates to form a microcrystalline structure and balance the thermal expansion difference. The coating has excellent high-temperature anti-cracking performance and suspension stability.