225 results about "Sepiolite" patented technology

The invention relates to the technical field of ceramics, in particular to a preparation method of a heat-resistant ceramic marmite. The heat-resistant ceramic marmite is composed of a green body and a glaze surface, and the green body is prepared from, by weight, 30-35 parts of fused quartz, 8-10 parts of petalite, 9-11 parts of kaolin, 19-21 parts of washed illite clay, 5-7 parts of sepiolite, 5-6 parts of andalusite, 7-9 parts of coal gangue, 0.2-0.7 part of zinc spinel and 2-3 parts of talc; the glaze surface is prepared from the following raw materials in parts by weight: 18 to 20 parts of fused quartz, 14 to 16 parts of petalite, 12 to 14 parts of kaolin, 5 to 6 parts of calcium oxide, 1.5 to 2 parts of zinc oxide, 1 to 1.5 parts of strontium oxide, 8 to 10 parts of spodumene, 0.6 to 0.8 part of lanthanum oxide, 8 to 10 parts of ZrSiO4 coated Al2O3 and 1.2 to 1.8 parts of pigment. The prepared ceramic marmite has the advantages of matt appearance, higher thermal stability, low water absorption rate and excellent comprehensive performance, and is not easy to crack and wear.

The invention belongs to the technical field of cement manufacturing, and particularly relates to high-strength weather-resistant environment-friendly cement and a preparation method thereof. The environment-friendly cement is prepared from the following raw materials in parts by mass: 40 to 55 parts of Portland cement, 15 to 25 parts of fly ash, 10 to 15 parts of slag powder, 6 to 12 parts of biomass reinforced composite mineral material, 2 to 4 parts of nano silicon dioxide, 1 to 4 parts of modified polymer emulsion and 1 to 3 parts of additive. The biomass reinforced composite mineral material is prepared from zeolite, bentonite, sepiolite and chitosan; the modified polymer emulsion comprises a modified polyacrylate emulsion and a modified polystyrene-butadiene emulsion in a mass ratio of (1-3): 1; the additive is prepared from basalt fiber, sodium lignin sulfonate, a rosin thermopolymer and sodium gluconate. The environment-friendly cement prepared by the invention not only has high strength and good weather resistance, but also remarkably reduces carbon footprint and saves natural resources.

The invention relates to the technical field of building materials, in particular to impermeable waterproof dry-mixed mortar and a preparation method thereof. The impervious waterproof dry-mixed mortar is prepared from the following raw materials in parts by weight: 1400 to 1550 parts of machine-made sand, 380 to 420 parts of Portland cement, 60 to 80 parts of fly ash, 30 to 50 parts of expanded perlite, 10 to 20 parts of latex powder, 7 to 10 parts of sepiolite powder, 5 to 10 parts of nano wollastonite powder, 2 to 4 parts of hydroxyethyl methyl cellulose, 2 to 5 parts of sodium citrate, 10 to 20 parts of fiber reinforcing agent, 3 to 5 parts of impervious agent, 6 to 10 parts of waterproof agent, 2 to 4 parts of expanding agent and 3 to 6 parts of water reducing agent. The dry-mixed mortar prepared by the invention not only has excellent mechanical properties, but also has good impermeability and waterproof performance, and the service life of the dry-mixed mortar is prolonged to a certain extent while the quality of the dry-mixed mortar is effectively guaranteed.

To provide an accurate prediction of sepiolite-bearing layer systems and a method for identifying logging of Permian sepiolite-bearing layer systems. [Solution] The method includes step S1 of data preprocessing, step S2 of setting a training set, a validation set, and a test set, step S3 of constructing a logging identification model, step S4 of using the CatBoost algorithm to perform a binary classification judgment on whether talc is present in a sepiolite-bearing layer system, step S5 of using the CatBoost algorithm to perform a multi-value classification judgment on the talc occurrence, step S6 of using the XGBoost algorithm to perform a regression prediction on the talc content of the stratum, step S7 of testing models using the validation set and the test set and selecting the model with the smallest loss function from the remaining models as the final model, and step S8 of using the final model to make predictions on Permian sepiolite-bearing layer systems awaiting identification.

The invention relates to a preparation method and application of a Ce / black TiO2 / sepiolite composite photocatalyst. According to the method, a one-step solvothermal method is adopted, Ti < 3 + > is introduced to the surface of white TiO2 in a self-doping mode to obtain black TiO2 with higher visible light response activity, meanwhile, Ce doping is performed on the black TiO2 in the reaction process, a carrier sepiolite mineral material is introduced, and therefore the novel Ce / black TiO2 / sepiolite composite photocatalyst different from the disclosed novel Ce / black TiO2 / sepiolite composite photocatalyst is prepared. The prepared composite photocatalyst is high in visible light utilization rate and good in degradation performance, and the effect of degrading residual xanthate in beneficiation wastewater is remarkable.

The invention discloses double-layer fancy glaze with chapped ground texture and a preparation method of the double-layer fancy glaze, and relates to the technical field of ceramic glaze. The double-layer fancy glaze is composed of a ground glaze layer and a cover glaze layer. The ground glaze raw materials comprise potassium feldspar, kaolin, calcite, quartz, dolomite, zinc oxide and pigment; the cover glaze raw materials comprise potassium feldspar, waste porcelain powder, blank powder, chinastone, limestone, sepiolite, quartz, zirconium silicate with the particle size D50 being less than or equal to 1.0 mu m and pigment. The preparation method comprises the following steps: respectively carrying out ball milling to prepare ground glaze slip (32-40 baume degrees) and cover glaze slip (51-53 baume degrees); spraying ground glaze on the green body, drying, and then soaking with cover glaze; and finally, sintering at the temperature of 1250-1270 DEG C in a reducing atmosphere. Through the synergistic effect of the sepiolite and other components, the cover glaze has high surface tension, forms a microcrack network during drying, generates controllable glaze shrinkage during firing, forms a three-dimensional chap texture with crack width of 1-5mm and strong curled and raised crack edges, and meanwhile, the ground glaze completely covers a green body, so that the product practicability is ensured.

The invention discloses a high-temperature dechlorinating agent for removing hydrogen chloride gas and a preparation method of the high-temperature dechlorinating agent, and belongs to the technical field of dechlorinating, and the preparation method of the high-temperature dechlorinating agent for removing the hydrogen chloride gas comprises four steps of preparing sepiolite-loaded active calcium powder, preparing copper-aluminum coated calcium carbonate whiskers, forming and roasting. According to the high-temperature dechlorinating agent for removing the hydrogen chloride gas, the penetration chlorine capacity is 78.5 to 81.7 percent, the crushing strength is 142 to 160N. Cm <-1 >, and the abrasion rate is 0.8 to 1.2 percent.

The invention relates to the field of solid waste resource utilization, and discloses an ardealite-based saline-alkali soil conditioner as well as a preparation method and an application method.The conditioner is prepared from the following raw materials in parts by weight: 235-330 parts of ardealite, 40-100 parts of sepiolite, 20-70 parts of lignocellulose, 15-30 parts of epoxy chloropropane and 8-20 parts of urea. According to the scheme, through compounding of sepiolite and ardealite, Ca < 2 + > is dissolved out by hydration of the ardealite to replace Na < + > in soil, the sepiolite achieves the effect of fixing Na < + > in the soil through magnesium ion exchange, and hydration of the ardealite is promoted; furthermore, magnesium ions react with water-soluble phosphorus in the ardealite, so that the obstruction of soluble phosphorus on the dissolution of Ca < 2 + > in the hydration of the ardealite is reduced, the hydration of the ardealite is further promoted, and the improvement and treatment effect of the ardealite on the saline-alkali soil is improved.

The invention discloses anti-cracking concrete and a preparation method thereof, and the anti-cracking concrete is prepared from the following raw materials in parts by weight: 400-450 parts of cement, 600-700 parts of fine aggregate, 900-1000 parts of gravel, 70-80 parts of a composite additive, 30-40 parts of modified fiber, 4-5 parts of a water reducing agent and 160-180 parts of water, the composite additive is prepared from fly ash, modified sepiolite, calcium sulphoaluminate and an air entraining agent; the modified sepiolite is obtained by taking sepiolite as a raw material, pretreating the sepiolite through a silane coupling agent and then sequentially reacting the pretreated sepiolite with sulfanilamide and dodecyl chloride. According to the invention, through the synergistic effect of the composite additive and the modified fiber, the comprehensive improvement of the crack resistance and mechanical strength of the concrete is realized, in the composite additive, the moderate expansion of calcium sulphoaluminate compensates the early shrinkage stress, the microbubble system formed by the air entraining agent relieves the stress concentration, and the dispersion effect of the polycarboxylate superplasticizer is matched, so that the crack resistance and mechanical strength of the concrete are improved. The hardened body forms a compact and uniform microstructure, and the tensile strength of the concrete is improved.

The invention discloses a high-temperature-resistant flame-retardant CPVC power cable protection pipe and a preparation method thereof, and relates to the technical field of cable protection pipes. The high-temperature-resistant flame-retardant CPVC power cable protection pipe at least comprises the following raw materials in parts by mass: 100 parts of chlorinated polyvinyl chloride; 15 to 25 parts of high impact resistance type MCS resin; 8 to 12 parts of poly (1, 2-propylene glycol adipate); 12 to 20 parts of a sepiolite-methyl methacrylate-butyl acrylate compound; 8-15 parts of aluminum-titanium composite coupling agent modified magnesium-aluminum-lanthanum hydrotalcite; 3-6 parts of a rare earth composite heat stabilizer; 2-4 parts of a processing aid; 0.5 to 1.5 parts of an antioxidant; and 1-2 parts of a lubricant. The prepared high-temperature-resistant flame-retardant CPVC power cable protection pipe has high heat resistance, high flame retardance and high impact resistance, and is excellent in comprehensive performance, high in safety and reliability and long in service life.

The invention relates to a heavy metal stabilizer and a preparation method and application thereof, and relates to the technical field of heavy metal stabilizers. The preparation method comprises the following steps: weighing sepiolite, adding hydrochloric acid, carrying out constant-temperature water bath, carrying out centrifugal separation to obtain a precipitate, drying the precipitate, and grinding to obtain the heavy metal stabilizer for sludge pyrolysis. Natural sepiolite is used as a base material, acid activation treatment is carried out through hydrochloric acid to obtain the heavy metal stabilizer, the heavy metal stabilizer is used in sludge pyrolysis, in the pyrolysis process, the heavy metal stabilizer fixes heavy metal in a pyrolysis product carbon in a stable form through the effects of surface adsorption, ion complexation, high-temperature packaging and the like, and the heavy metal stabilizer is used for sludge pyrolysis. Therefore, the emission of heavy metals in the pyrolysis process is reduced, and the ecological risk and the use risk of the pyrolysis product carbon are reduced.

The invention discloses an air purification composition capable of generating negative oxygen ions. The air purification composition is prepared from the following raw materials in parts by weight: 800 to 1000 parts of pine needle extract powder, 87 to 107 parts of cacumen biotae extract powder, 58 to 68 parts of perilla frutescens extract powder, 58 to 68 parts of lucky tree extract powder, 58 to 68 parts of cactus extract powder, 58 to 68 parts of ampelopsis grossedentata leaf extract powder, 25 to 40 parts of biotite powder and 170 to 230 parts of expanded vermiculite powder. The attapulgite-sepiolite-rectorite composite material is prepared from the following components in parts by weight: 170 to 230 parts of attapulgite powder, 170 to 230 parts of sepiolite powder, 170 to 230 parts of rectorite powder and 30 to 40 parts of vinasse powder; the negative oxygen ion generator can effectively release negative oxygen ions, has the advantages of being environmentally friendly, safe, healthy and the like, can decompose indoor pollutants such as formaldehyde and ammonia, and plays an important role in purifying the indoor environment and reducing pollution.

The invention belongs to the technical field of flame-retardant materials, and particularly relates to N-methylmaleimide modified sepiolite as well as a preparation method and application thereof. The sepiolite raw material is subjected to acidification pretreatment, silane coupling agent modification and N-methylmaleimide modification, so that the dispersity of sepiolite in the flame-retardant cable material can be remarkably improved, the flame retardance of the flame-retardant cable material is effectively improved, and meanwhile, the flame-retardant cable material keeps good tensile strength, elongation at break and volume resistivity; the cable has a good application prospect in the field of communication cables or power cables.

The invention relates to a method for preparing a hydrated magnesium silicate cementing material by using sepiolite, which comprises the following steps: dissolving sepiolite by using strong acid, and separating to obtain a solution and residues; naOH is added into the solution, and Mg (OH) 2 sediment is obtained; and separating the Mg (OH) 2 precipitate, calcining to obtain MgO, mixing a water reducing agent, the residues and the MgO, and adding water for curing to obtain the hydrated magnesium silicate cementing material. Rich sepiolite in the earth crust is used as a main raw material, so that low-cost and large-scale preparation of the hydrated magnesium silicate cementing material is realized.

The invention relates to the technical field of building waterproof materials, and discloses a composition for an asphalt waterproof coating, the asphalt waterproof coating and a preparation method and application of the asphalt waterproof coating. The composition contains a main agent and an auxiliary agent, the main agent comprises composite asphalt, a filler composition and an antioxidant; relative to 100 parts by weight of the composite asphalt, the content of the filler combination is 30-50 parts by weight, the content of the antioxidant is 1.5-4 parts by weight, and the content of the additive is 14-30 parts by weight; wherein the composite asphalt is a combination of petroleum asphalt and plant asphalt; the filler composition is a composition of montmorillonite, sepiolite and diatomite in a content mass ratio of 1: (1-4): (1.5-6); the montmorillonite is loaded with 0.5 to 4 mmol / g of copper ions, and the diatomite is loaded with 0.5 to 4 mmol / g of silver ions. The waterproof coating provided by the invention can significantly improve the peel strength, weather resistance and aging resistance of the coiled material, and also has efficient mildew-proof and antibacterial effects.

The invention provides a mine filling cement material capable of cementing high-content phosphate tailings as well as a preparation method and a use method thereof, relates to the technical field of mine filling materials, and solves the technical problems that the existing mine filling cement material cannot shorten the setting time and improve the setting strength of the material while reducing the bleeding rate. The high-strength concrete is prepared from the following components: 40 to 45 weight percent of slag, 7 to 10 weight percent of metakaolin, 8 to 10 weight percent of yellow phosphorus slag, 0 to 5 weight percent of phosphogypsum, 35 to 40 weight percent of cement clinker, 1 to 5 weight percent of exciting agent and 1 to 5 weight percent of mineral admixture, the mineral admixture is prepared from bentonite, sepiolite and attapulgite. According to the invention, the setting time can be effectively shortened, the bleeding rate is effectively reduced, the filling time is shortened, the underground drainage and filling cost is reduced, the pollution to the water environment of a mining area is reduced, the effective utilization of the phosphate tailings is realized, and the stacking of the phosphate tailings and the environmental pollution are reduced; the condensation speed and the strength of the filling body can be effectively improved; the comprehensive performance of the material is improved.

The invention discloses a preparation process of a Yellow River superfine sand 3D printing concrete material, which comprises the following steps: (1) immersing microcrystalline glass fine aggregate into a sodium silicate or potassium solution for treatment, and then drying to obtain pretreated fine aggregate; (2) dispersing sepiolite micro powder and the pretreated fine aggregate into water, and heating to obtain modified fine aggregate a; and (3) mixing the modified fine aggregate a with the liquid phase obtained by solid-liquid separation to form a mixture, then placing the mixture in a carbon dioxide atmosphere for carbonization treatment, and then performing heating treatment to decompose silicic acid into silicon dioxide to obtain modified fine aggregate b. And (4) mixing Portland cement, the modified fine aggregate b, Yellow River superfine sand, silica fume, a water reducing agent and fibers as raw materials, adding mixing water, and uniformly stirring to obtain the 3D printing concrete material. According to the process, the bleeding phenomenon caused by the Yellow River superfine sand is relieved, and the prepared concrete has the characteristics of good extrusion performance and stable shape after printing.

The invention discloses an organic-inorganic composite acid soil conditioner with synergism of nitrogen element synergism and soil expansion and application, and belongs to the technical field of soil conditioners. The modifier prepared by the invention is prepared from an acid neutralizer, a structure modifier, a capacity expansion synergist and a nitrogen synergist and is prepared from the following components in parts by weight: 18 to 22 parts of dolomite powder, 6 to 10 parts of lime powder, 20 to 24 parts of oyster shell powder, 8 to 12 parts of humic acid, 4 to 8 parts of sargassum, 1 to 3 parts of sodium alginate, 7 to 11 parts of charcoal, 5 to 9 parts of sepiolite powder, 3 to 7 parts of bentonite, 6 to 10 parts of poly gamma-calcium glutamate and 3 to 7 parts of chitosan. The soil conditioner can regulate and control the soil acidity, buffer the soil capacity, improve the soil structure and balance soil nutrients, solves the problems of high re-acidification rate, soil hardening and nutrient imbalance of a traditional lime conditioner, and is suitable for pHlt; and 6.5, repairing the acid soil.

The invention provides a plugging agent for drilling fluid as well as a preparation method and application thereof, and belongs to the technical field of drilling fluid, the plugging agent for drilling fluid comprises the following components: a main body material which is selected from one or more of sepiolite, apricot shell, coconut fiber, walnut shell and peanut shell; the coating material is coated on the surface of the main body material to form a coating layer and comprises epoxy resin and polyacrylamide; wherein the diameter of the main body material ranges from 0.005 mm to 0.03 mm. After being prepared into plugging drilling fluid to be pumped into a well bottom, the plugging drilling fluid easily enters formation cracks under the action of pressure difference, plugging agent particles are mutually filled to achieve a certain temporary plugging effect, and are mutually cemented and solidified under the action of formation temperature, and after 3-5 hours, solidified blocks are formed to achieve the effects of plugging a leakage layer and preventing the leakage layer from being blocked. And the loading capacity of the stratum is improved.

The invention relates to a method, device and equipment for identifying sepiolite in rock and a medium, and belongs to the technical field of image processing, and the method for identifying sepiolite in rock is used for identifying sepiolite in rock based on a fully trained hybrid neural network model. The hybrid neural network model comprises a feature extraction layer, an early fusion layer, a middle fusion layer and a late fusion layer, feature extraction is carried out on the multi-modal data based on the feature extraction layer, image feature vectors and text feature vectors are spliced based on the early fusion layer, weighted fusion is carried out on the multi-modal feature vectors based on the middle fusion layer, and a fusion result is obtained; and performing classification feature extraction on the fused feature vector based on the late fusion layer, fusing the image classification feature and the text classification feature, and inputting the fused classification feature, the fused feature vector and the multi-modal feature vector into a classifier to identify the sepiolite in the rock. And the identification efficiency and the identification precision of the sepiolite in the rock are improved.

The invention relates to the technical field of soil remediation, and particularly discloses a biochar material for remediation of heavy metal polluted saline-alkali soil and a remediation method. The biochar material is prepared from 55 to 65 parts of modified biochar, 5 to 10 parts of humic acid-sulfur coated microspheres, 2 to 8 parts of sepiolite powder, 2 to 5 parts of polylactic acid coated nano zero-valent iron material, 2 to 5 parts of diatomite and 1 to 3 parts of ammonium dihydrogen phosphate; the modified biochar is biochar loaded with iron and manganese oxides; the humic acid-sulfur coated microspheres are microsphere particles with a degradable polylactic acid coating layer, and humic acid and sulfur are wrapped in the degradable polylactic acid coating layer; the polylactic acid coated nano zero-valent iron material is a core-shell structure material formed by taking polylactic acid as a shell and nano zero-valent iron as a core; the size of the modified charcoal, the humic acid-sulfur coated microspheres and the polylactic acid coated nano zero-valent iron material is 80-120 meshes. The method is helpful for improving the adsorption capacity of heavy metals in the saline-alkali soil.

This invention relates to the field of concrete technology, specifically to a self-healing concrete material, its preparation method, and its application. The self-healing concrete material is a core-shell structured microcapsule, comprising a core material and a wall material. The wall material wraps around the core material. The core material comprises the following raw materials in parts by weight: 4-6 parts β-cyclodextrin, 12-18 parts sepiolite powder, 5-10 parts shellac powder, 25-35 parts sulfoaluminate cement, 10-15 parts magnesium oxide, 12-16 parts sodium silicate aqueous solution, and 14-17 parts calcium carbonate. The wall material comprises the following raw materials in parts by weight: 20-30 parts polyvinyl alcohol, 20-30 parts ethyl cellulose, 15-25 parts bentonite, and 25-35 parts corn starch. The mass ratio of the core material to the wall material is 6-7:3-4. The core material of the self-healing concrete material provided by this invention, comprising β-cyclodextrin, sepiolite powder, and shellac powder, can improve the problems of slow repair speed and poor reinforcement effect of self-healing materials.

The invention relates to the technical field of phase change energy storage materials, in particular to a novel phase change energy storage material and a preparation method thereof. Comprising the following components: 22-25% of ammonium chloride, 17-20% of potassium chloride, 30-32% of sodium sulfate, 8-13% of an additive and 15-17% of a thickening agent, the additive is disodium tetraborate, and the thickening agent is sepiolite. According to the scheme, the phase change energy storage material with the freezing temperature being the positive temperature can be obtained, ammonium chloride, potassium chloride and sodium sulfate are adopted as raw materials, disodium tetraborate is matched to serve as an additive, sepiolite serves as a thickening agent, the phase change energy storage material is prepared through the preparation method, and different proportions of all raw material components are designed, so that the phase change energy storage material with the freezing temperature being the positive temperature is obtained. The phase-change energy storage material with different icing temperatures can be obtained, the phase-change energy storage material not only can be applied to a cold storage system, but also can be applied to a heat storage system, the application range is wide, and compared with a phase-change material with a single temperature specification, the phase-change energy storage material and the preparation method have wider application prospects.

A product and method of producing a product that may comprise diatomaceous earth, clay and dispersant. The clay may comprise (a) attapulgite or (b) sepiolite or (c) attapulgite and sepiolite. A portion of the clay and a portion of the diatomaceous earth is agglomerated to form a plurality of composite particles, wherein the composite particle is at least partially surface treated with the dispersant. The product may have a particle size distribution having a d50 of 5-40 microns and a d10 of 1-15 microns. The product may have a median pore diameter of 2-10 microns, a pore volume of 1-4 mL / g and a bulk density of 50-300 kg / m3.

The invention relates to a multi-permeable reactive barrier developed for use in nuclear power plants, which provides the uptake of cesium and strontium radionuclides, and contains at least one upper cover (1) providing fixation, through which the liquid enters; at least one lower cover (2) providing fixation, through which the liquid exists (drainage); at least one sealing element (3) positioned to separate each component from each other; at least one liquid permeable filter (4); and at least one body (5) containing zeolite, diatomite, clay and sepiolite components, respectively from top to bottom.

A product for adsorbing a heavy metal that includes arsenic and / or selenium. The product may comprise clay that has been surface functionalized with a surface treating agent. The surface treating agent may include (a) one or more arsenic affinity functional groups, and / or (b) one or more selenium affinity functional groups. The weight percentage of components of the product may include: 70 – 99 wt. % clay and 1 – 30 wt. % surface treating agent. 60 – 95 % of the product is in the form of granules sized to pass through a 10 mesh sieve and to be retained on a 100 mesh or 60 mesh sieve, or sized in the range of less than 2000 microns to 149 or 250 microns. The clay includes attapulgite and / or sepiolite. Also disclosed is a method of producing the product and a method of adsorbing the heavy metal in a liquid using the product.

The invention provides salt-resistant soil for drilling fluid as well as a preparation method and application of the salt-resistant soil, and relates to the field of drilling fluid. The salt-resistant soil for the drilling fluid is prepared from the following raw materials in parts by weight: 25 to 30 parts of purified sepiolite, 7 to 20 parts of 2-acrylamido-2-methylpropanesulfonic acid, 7 to 10 parts of N, N-dimethylacrylamide, 9 to 15 parts of a cationic monomer and 1 to 2 parts of an initiator. The invention further provides a preparation method of the salt-resistant soil for the drilling fluid and application of the salt-resistant soil in the water-based drilling fluid. The salt-resistant soil for the drilling fluid provided by the invention can keep a good slurry making rate in fresh water, saturated salt water and composite salt water, has good rheological property and outstanding temperature resistance, is suitable for various drilling fluid systems, is wide in application range, particularly can be used for directly making slurry by using seawater in offshore drilling operation, and has a wide application prospect. And the construction is more convenient in an environment lacking fresh water resources.

The application discloses a method for preparing a magnesium silicate hydrate cement material by using sepiolite, and the method comprises the following steps: dissolving sepiolite by using a strong acid, and separating a solution and a residue; adding NaOH into the solution to obtain Mg(OH)2 precipitate; separating the Mg(OH)2 precipitate, and calcining to obtain MgO; mixing a water reducing agent, the residue and the MgO, and adding water to maintain, so as to obtain the magnesium silicate hydrate cement material. The method uses sepiolite which is rich in the earth's crust as a main raw material, and realizes low-cost and large-scale preparation of the magnesium silicate hydrate cement material.

The application discloses a preparation method and application of an enhancer for deep coal bed gas well cementing preflush fluid, and the preparation method comprises the following steps: mixing epoxy resin, acetylacetone, triethylamine and deionized water, stirring and reacting at 80-90 DEG C for 2-4 h, then adding adipic acid in batches, keeping the temperature and continuously reacting for 6-12 h, removing acetylacetone through reduced pressure distillation, and obtaining an intermediate product M1; weighing the intermediate product M1, adding a silane coupling agent, a dispersant, sodium silicate, a calcium salt and an aluminate to the intermediate product M1 in a stirring state, stirring for 5-10 min, then standing and reacting at 35-40 DEG C, to obtain a hydrated nanometer material intermediate product M2; weighing the intermediate product M2, and adding fibrous sepiolite to the intermediate product M2 and uniformly mixing. The enhancer can modify the wettability of a coal rock surface into hydrophilicity, and when the enhancer is used for deep coal bed gas well cementing preflush fluid, the well cementing quality of a deep coal bed gas horizontal well is improved.

The invention relates to an efficient and long-life inorganic dry powder coating with a self-humidifying function and a preparation method thereof, and belongs to the technical field of inorganic coatings. The inorganic dry powder coating comprises the following components in parts by weight: 30-40% of potassium silicate, 10% of expanded perlite, 10-25% of high-activity sepiolite nanofiber, 10% of calcined shell powder, 18-28% of quartz sand and 2-3% of an auxiliary agent. The preparation method comprises the following steps: firstly, treating a sepiolite raw material by virtue of a synergistic process of ultrasonic beam splitting and citric acid activation, so as to obtain high-activity sepiolite nanofibers which are fully dissociated, have nano hierarchical pore channels and are rich in hydrophilic groups; and compounding the high-activity sepiolite nanofiber with calcined shell powder, expanded perlite, quartz sand and potassium silicate to synergistically construct an inorganic coating system with optimized microstructure and efficient moisture absorption / liberation performance. The coating is simple in preparation process and environment-friendly, has excellent mechanical properties and self-humidity-regulating performance, still keeps an efficient humidity-regulating effect in a long-term service environment, and has outstanding long-acting stability.