466 results about "Calcium silicate" patented technology

The invention relates to a composite powder explosion suppressant for suppressing aluminum hydride explosion and a preparation method of the composite powder explosion suppressant, belongs to the technical field of explosion suppressants, and solves the problems of single action mechanism, high required explosion suppression concentration, low efficiency and the like of a traditional explosion suppressant. According to the solution, the composite powder explosion suppressant for suppressing aluminum hydride explosion is prepared through raw material pretreatment, powder mixing and drying in sequence, and the composite powder explosion suppressant is prepared from the following components in parts by mass: 10.2 to 30.2 parts of melamine cyanurate, 20.4 to 40.6 parts of monopotassium phosphate, 15.2 to 25.2 parts of potassium bicarbonate, 8.4 to 13.2 parts of aluminum hydroxide, 6.8 to 11.1 parts of zinc borate, 5.0 to 9.0 parts of fumed silica and 2.0 to 5.3 parts of calcium silicate. The explosion suppressant can act on different combustion areas and combustion stages in the aluminum hydride explosion process, the physical and chemical explosion suppression effects of all the components of the explosion suppressant are fully exerted, and meanwhile, efficient explosion suppression of aluminum hydride explosion can be achieved through the synergistic effect of all the components.

The invention relates to the technical field of pharmaceutical preparations, in particular to a solid dispersion-based sustained-release drug composite carrier as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out synergistic spray drying on double polymers (hydroxypropyl methylcellulose acetate succinate and polyvinylpyrrolidone-vinyl acetate copolymer) to form a solid dispersion; compounding with mesoporous silica and calcium silicate for localization, and spraying ethanol to activate pores; calcium stearate and magnesium stearate are sequentially added for lubrication; prefabricating a sustained-release skeleton master batch; and finally, mixing, rolling and forming. According to the method, through hierarchical structural design, the drug stability, the powder fluidity and the release controllability are remarkably improved, the method is suitable for industrial production of the dihydroergoline mesylate sustained release preparation, and a release curve is smooth and reliable.

The invention discloses a modified nano hydrated calcium silicate chloride ion curing agent as well as a preparation method and application thereof, and belongs to the technical field of chemical materials. The curing agent is composed of 65-75 parts of synergistically modified nano calcium silicate hydrate, 10-20 parts of mesoporous silica with a high specific surface area, a composite dispersion stabilizer with a specific ratio, and an active activator compounded by triethanolamine and anhydrous sodium sulfate. The nano calcium silicate hydrate is synergistically modified by gamma-aminopropyltriethoxysilane and sodium dodecyl benzene sulfonate, so that the nano calcium silicate hydrate has the excellent performance that the zeta-potential absolute value is greater than or equal to 25 mV, the dispersity is high, and the chloride ion binding capacity is improved by greater than or equal to 40%. Through the synergistic effect of all the components, the technical problems that an existing chloride ion curing agent is low in adsorption capacity, poor in selectivity, prone to agglomeration in concrete and the like are solved, and the chloride ion curing agent is particularly suitable for improving the durability of the concrete in harsh chloride salt environments such as port engineering and maritime work structures.

The invention discloses a flame-ablation-resistant fireproof coating as well as a preparation method and application thereof, and belongs to the technical field of fireproof coatings. The coating comprises 20-60 parts of a film forming matter, 5-25 parts of indirect ceramic forming filler, 10-30 parts of an acid source and 5-15 parts of a gas source, the indirect ceramic forming filler comprises any one or more of feldspar, illite, kaolinite, montmorillonite, calcium silicate and magnesium silicate. The indirect ceramic forming filler is decomposed into a ceramic forming material at high temperature, and at the moment, the fireproof coating expands to form an expansion layer; the ceramic forming material in the expansion layer further reacts under the action of high-temperature flames, especially the ceramic forming material outside the expansion layer facing high temperature, to generate a ceramic substance, so that the surface ceramization of the fireproof coating is controllable, and the ceramization effect of the expansion layer after the coating is fully expanded is achieved; the problem that the fireproof performance is reduced due to the fact that a coating expansion layer forms a hard shell layer too early when the high-temperature-resistant performance of the fireproof coating is improved through a ceramic method is solved.

The invention discloses an anti-cracking calcium silicate board and a preparation method thereof, and relates to the technical field of light building materials. The method comprises the following steps: carrying out ball milling, acid pickling and silane coupling agent surface modification on quartz sand to obtain alkylated quartz sand; and carrying out dry mixing on the mixture, metakaolin, silica fume and cement. The linen fiber is subjected to alkali treatment and hydroxyethyl acrylate graft modification, and the PVA fiber is subjected to silane coupling agent and nano silicon dioxide coating treatment. Dispersing graphene oxide, carboxylated styrene-butadiene emulsion and other assistants in water, adding the dry mixture, uniformly stirring, and then adding the two modified fibers to prepare mixed slurry; and finally, carrying out pressure forming, pre-curing, high-pressure steam curing and drying to obtain a finished product. Through substrate silanization, fiber grafting / nanocrystalline seed modification and synergistic introduction of graphene oxide and elastic emulsion, the interface bonding strength and toughness are remarkably enhanced, crack initiation and propagation are effectively inhibited, and the plate has excellent cracking resistance.

The invention discloses a chitin-silicon-calcium-based modified material for rammed earth wall repair and a weather resistance evaluation method thereof, and belongs to the technical field of rammed earth wall repair, the chitin-silicon-calcium-based modified material comprises metakaolin, calcium oxide, quartz and chitin; the ratio of chitin to metakaolin to calcium oxide to quartz is 1: 1: 2: 4; the method comprises the following steps: pre-treating at the earlier stage of a test, evaluating freeze-thaw cycle performance, evaluating dry-wet cycle performance, evaluating salt corrosion resistance, analyzing association between a microstructure and a strength performance, and finally, revealing a material degradation rule and mechanism by combining scanning electron microscope observation, unconfined compressive strength test and crack rate analysis. When the freezing and thawing cycle number N is less than or equal to 5, the dry and wet cycle number I is less than or equal to 9, and the salt solution concentration c is less than or equal to 0.3 mol / L, the characteristics of freezing and thawing resistance, dry and wet resistance, salt erosion resistance and the like of the modified material are obviously improved; after the modified material is added, internal pores of plain soil can be filled, unconfined compressive strength of a soil body is enhanced, and long-term durability of the soil body is improved.

Provided in the present application are a battery assembly and an electrical device. The battery assembly comprises at least two groups of cell battery packs, and a separator located between two adjacent groups of cell battery packs. The separator comprises a hard calcium silicate board, and the hard calcium silicate board comprises a hard calcium silicate material, the density of the hard calcium silicate plate being greater than 170 kg / m3 and less than 600 kg / m3. The present application can effectively inhibit the problems of heat diffusion and thermal runaway, and improve the thermal safety and other performance of the battery assembly.

The utility model discloses a calcium silicate board die-pressing device, and particularly relates to the technical field of die-pressing equipment, the calcium silicate board die-pressing device comprises a base, a die-pressing frame is fixedly installed on the top surface of the base, four guide frames are arranged on the top surface of the base, and the interiors of the four guide frames are respectively connected with two stamping dies used for die-pressing of a calcium silicate board in a sliding mode. In actual work, the air cylinder pushes the boosting block to descend and pushes the fixing plate and the stamping die plate to descend, so that the stamping die plate is inserted into the stamping die to conduct stamping machining on the calcium silicate plate in the stamping die, the motor drives the rotating plate to rotate, the position of the air cylinder is adjusted, and the calcium silicate plate is pressed. The air cylinder can push the stamping die plates of different sizes to descend, the stamping die plates are matched with the stamping dies of the corresponding sizes, calcium silicate plates of different sizes can be subjected to die pressing machining, and therefore the different stamping dies and the stamping die plates can be rapidly replaced for operation so that the calcium silicate plates of different sizes can be subjected to die pressing machining.

This utility model relates to the field of calcium silicate board technology, specifically disclosing a quick-installation prefabricated calcium silicate board arc wall panel, including a calcium silicate board body and a wooden base layer, and further including: a fireproof sheet as the base layer of the calcium silicate board body; an aluminum honeycomb panel as an arc-shaped material bonded to the fireproof sheet; calcium silicate connecting plates disposed on both sides of the aluminum honeycomb panel; and an adhesive backing film bonded to the aluminum honeycomb panel and the calcium silicate connecting plate; the fireproof sheet, aluminum honeycomb panel, calcium silicate connecting plate, and adhesive backing film are bonded together to form the calcium silicate board body; by shipping the finished product from the factory, the problem of dust generated during on-site cutting can be solved, and on-site cutting is not required, thereby reducing the scrap rate and facilitating use.

This invention relates to the field of calcium silicate board preparation technology, specifically a coating device for calcium silicate board preparation. The device includes a roller frame with conveyor rollers rotatably arranged at equal intervals along its left-right direction. Two roller frames are symmetrically arranged front and back. A conveying component for stably conveying the calcium silicate board is located in the middle of the roller frame. A U-shaped frame is installed on the upper middle side of both roller frames. A coating component for uniformly coating the calcium silicate board is located inside the U-shaped frame. This invention uses equally spaced detection rollers to roll on the upper side of the calcium silicate board. By detecting the unevenness of the upper surface of the calcium silicate board, the position of the adjusting sleeve inside the feed tube is controlled by a follower frame, thereby controlling the flow rate of the filler in the feed tube. This allows the invention to adjust the amount of filler in real time according to the actual surface condition of the calcium silicate board, thus greatly reducing filler waste.

This invention discloses an in-situ three-dimensional bioremediation method for slightly polluted water bodies. The method involves collecting a mud-water mixture from the water body to be treated, enriching and culturing it, and collecting the settled sludge. Culture medium II is added to the settled sludge for acclimatization and cultivation to prepare a biological agent. This biological agent is then added to a mixed solution of polyvinyl alcohol-hydrated calcium silicate-fulvic acid (PVA-CSH-FA) or PVA-modified zeolite-FA to prepare an immobilized biological carrier that can slowly release or adsorb calcium ions from the water. Calcium peroxide packing is also prepared to provide oxygen. The immobilized biological carrier packing and calcium peroxide packing are respectively fixed in the upper and lower layers of an ecological sedimentation bed, which is then placed in the slightly polluted water body to achieve in-situ three-dimensional bioremediation. The calcium-precipitating bacterial biological agent obtained through enrichment and acclimatization in this invention, when immobilized and mixed with the carrier material, efficiently and simultaneously removes pollutants such as nitrogen, phosphorus, organic matter, and heavy metals from slightly polluted water bodies.

The application belongs to the technical field of solid waste resource utilization, and specifically discloses a method and device for preparing silicon-calcium aggregate, sulfuric acid and CO2 by phosphogypsum oxygen-rich high-temperature decomposition. The method uses the adsorption method to obtain pure nitrogen products and oxygen-rich combustion-supporting gas, and provides different reaction temperatures and reaction atmospheres for different reaction stages of the rotary kiln reactor through the multi-point combustion mode, thereby ensuring the controllable high-temperature environment and atmosphere in the kiln. The method improves the combustion efficiency, greatly reduces the amount of flue gas after decomposition, effectively improves the concentration of SO2 in the flue gas and the efficiency of the subsequent sulfuric acid preparation system, and realizes CO2 emission reduction and resource utilization by using the CO2-rich tail gas of the sulfuric acid preparation system for adsorption recovery. The application also provides a device for realizing the method, which combines gas adsorption, oxygen-rich combustion and rotary kiln multi-point combustion equipment, thereby ensuring the effective realization of the process.

The utility model discloses an environment-friendly decorative heat-insulation fireproof composite board which comprises a positioning board, a connecting board is arranged on one side of the positioning board, an aerogel heat-insulation layer is arranged on the inner side of the connecting board, the aerogel heat-insulation layer and the connecting board are bonded through a bonding layer, an outer base board is arranged on the outer surface of the connecting board, and a heat-insulation layer is arranged on the outer base board. The outer surface of the positioning plate located on one side of the connecting plate is coated with an expansion type fireproof coating, a honeycomb plate is arranged on the other side of the positioning plate, a calcium silicate fireproof layer is arranged at the upper end of the inner side of the honeycomb plate, a polyester fiber layer is arranged at the lower end of the inner side of the honeycomb plate, and an inner base plate is arranged at one end of the honeycomb plate. Hydrophobic coatings are arranged on the outer surfaces of the inner base plate and the outer base plate, clamping plates are evenly arranged at the two ends of the connecting plate, and the clamping plates are connected with the positioning plates through connecting grooves. The heat insulation and fireproof effects of the composite board are improved.

The invention discloses a method for comprehensively utilizing vanadium and chromium resources, which comprises the following steps: mixing chromium hydroxide with sodium hydroxide, and introducing oxygen for liquid-phase oxidation to obtain an oxidation solution; adding calcium oxide into the oxidation liquid, stirring and mixing, and performing solid-liquid separation after reaction to obtain calcium vanadate solid and vanadium-free alkali liquid; adding a decalcifying agent into the vanadium-free alkali liquor, and carrying out solid-liquid separation to obtain calcium carbonate and refined sodium chromate alkali liquor; reacting calcium vanadate with roasting slurry containing aluminum, silicon and carbonate to form calcium aluminosilicate precipitate and desiliconized high-vanadium alkali liquor; continuously neutralizing the desiliconized high-vanadium alkali liquor and the carbonization solution to obtain an aluminum-vanadium high-valued product and a neutral solution; the neutral liquid is carbonized, and obtained sodium bicarbonate and carbonized liquid can be returned to a system for recycling. The method for comprehensively utilizing the vanadium and chromium resources has the advantages of being simple in process, environmentally friendly, efficient, easy to control in operation, easy to obtain raw materials, low in production cost and the like.

The utility model relates to a stainless steel plate light-transmitting ceiling model compounded by an aluminum honeycomb plate and an acrylic plate, which comprises a galvanized screw rod, the top end of the galvanized screw rod is fixed on a building floor through an expansion bolt, a ceiling main keel is hung at the bottom end of the galvanized screw rod through a ceiling main hanger, and the lower side of the ceiling main keel is connected with a covering keel. The covering keel is in butt joint with the suspended ceiling main keel, a calcium silicate board and a gypsum plaster board are sequentially arranged below the covering keel, a metal plate hanging piece is hung below the gypsum plaster board through a second lead screw, and a hollowed-out stainless steel light-transmitting modeling board is installed on the metal plate hanging piece and comprises a stainless steel base board. A vacuum titanizing layer and a nano surface treatment layer are sequentially arranged on the surface of the stainless steel base plate, and an aluminum honeycomb plate and a light-transmitting acrylic plate are compounded on the hollowed-out stainless steel light-transmitting mould plate; secondary on-site facing construction is not needed, secondary paint construction is not needed on the construction site, construction is convenient and fast, the construction and installation period is shortened, and energy conservation and environmental protection are achieved.

The invention provides a full-automatic calcium silicate board gluing, compounding and pressing production line control system and a production method, belongs to the technical field of industrial control systems, and solves the problem of lack of cooperative control due to independent operation of equipment. Comprising a feeding conveying table, a gantry feeding machine, a first full-automatic glue spraying machine, a rapid conveying platform, a rock wool composite component, a second full-automatic glue spraying machine, a four-side positioning machine, a bottom plate composite machine, a stacking and transferring mechanism, a lifting conveying type cold press and a finished plate transferring platform in sequence. The rock wool composite component comprises a rock wool swinging machine and an automatic rock wool composite machine; the stacking and transferring mechanism comprises a gantry stacking machine and a lifting type transverse moving conveying table. According to the full-automatic calcium silicate board production line, a control module integrating the whole process of feeding, glue spraying, compounding, positioning, pressing, stacking and cold pressing is adopted, precise linkage of all equipment is achieved through a process rhythm collaborative algorithm, the production rhythm difference is eliminated, and the industrial production efficiency of calcium silicate boards is improved.

A solid waste-based nano-hydrated calcium silicate nucleating agent, its preparation method, and its application in low-heat cement are disclosed. This invention belongs to the field of building materials technology. By weight, it comprises the following components: 10-30 parts of carbide slag, 20-45 parts of yellow phosphorus slag, and 400-2000 parts of sodium hydroxide solution. The calcium hydroxide content in the carbide slag is ≥80%. The silicon dioxide content in the yellow phosphorus slag is ≥35%, and the calcium oxide content is ≥40%. The pH value of the sodium hydroxide solution is 11-12. This invention uses carbide slag, yellow phosphorus slag, and sodium hydroxide solution as raw materials to synthesize a solid waste-based nano-hydrated calcium silicate nucleating agent. Utilizing its nano-sized hydrated calcium silicate as a seed crystal in the early stage of hydration in low-heat cement, it can provide nucleation sites for the hydrated calcium silicate gel, a product of low-heat cement hydration, reducing the nucleation barrier of the hydrated calcium silicate gel, promoting the hydration rate and early strength development of low-heat cement, and providing strong support for the later strength development of low-heat cement, effectively improving the problem of drying shrinkage cracking in low-heat cement.

The invention discloses a performance improvement mechanism and a preparation method of a modified Aga soil material, a silane coupling agent and hydraulic lime are added into traditional Aga soil (Aga soil, water, elm bark juice and clear oil), and the modified Aga soil material is formed by combining a Tibetan ramming process. The modification principle is as follows: a silane coupling agent is dissolved in water to form a silanol solution, the silanol solution permeates into Aga soil along with ramming after being sprayed, and the hydraulic lime and the Aga soil are subjected to a pozzolanic reaction to generate a gelling product mainly comprising hydrated calcium silicate, so that the bonding and overall mechanical properties among particles of the Aga soil are improved; silanol and hydroxyl groups on the surface of the gelling product are subjected to dehydration condensation to form siloxane covalent bonds and enhance the structural stability; then, the silanol molecules are subjected to cross-linking polymerization, an organosilane polymer hydrophobic membrane is formed on the surfaces of the Aga soil and the gelling product, moisture is effectively blocked, and the water resistance and the impermeability of the Aga soil material are improved. The preparation method disclosed by the invention is simple, convenient, green and environment-friendly, can obviously improve the mechanical and durability of Aga soil, and has a good engineering application prospect.

A method of inhibiting a cancer cell growth includes contacting the cancer cell with a Cu2(OH)3NO3 / CaSiO3@g-C3N4 nanocomposite material containing graphitic carbon nitride (g-C3N4), copper hydroxide nitrate (Cu2(OH)3NO3) and calcium silicate (CaSiO3), achieving an inhibition efficiency on human breast carcinoma (MCF-7) and human hepatocellular carcinoma (HepG-2) cell growth of greater than 95% in an in-vitro cellular viability assay.

The application provides a fast-hardening early-strength high-pressure and freeze-resistant cement material and a preparation method thereof, belongs to the technical field of cement materials, and the cement material comprises silicate cement clinker, natural anhydrous gypsum, calcined kaolin, calcined quartz powder, a silicon-aluminum-titanium composite mineralized early-strength freeze-resistant agent, a crystal bridge-pore dual functional agent and the like. The silicon-aluminum-titanium composite mineralized early-strength freeze-resistant agent is prepared by sintering, quenching and heat reaction of bauxite, silica fume, titanium dioxide, anhydrous calcium chloride and trisodium citrate, and surface modification by KH-550. The crystal bridge-pore dual functional agent comprises a calcium silicate hydrate crystal bridge agent and a polymer-SiO2 composite elastic pore forming agent. The polymer-SiO2 composite elastic pore forming agent is prepared by shearing emulsification of an oil phase prepared from styrene, butyl acrylate, divinylbenzene and polyglyceryl-10 diisostearate and an aqueous phase prepared from deionized water, sodium dodecyl sulfate and polyethylene glycol allyl methyl ether, ammonium persulfate reaction and tetraethyl orthosilicate reaction.

A coating includes a filler, an alkali metal-rich silicate having the formula [Li2O] x [Na2O] y [K2O] z [SiO2] and water. The filler includes alumina, aluminosilicate, calcium silicate, titanium dioxide, silicon carbide, silicon nitride, boron nitride, hexagonal boron nitride, zircon, kaolin, mica, vermiculite, graphite, or a combination thereof. The sum of x, y, and z in the alkali metal silicate is at least 0.35. The molar ratio of water to alkali metal silicate in the coating is 4 to 20. Coatings and articles containing dried coatings that can be used as impact-resistant thermal barriers in high temperature applications.

The invention belongs to the technical field of building materials, and particularly relates to impervious concrete and a preparation method thereof. The impervious concrete comprises a cementing material, aggregate, water and a self-repairing functional component, the self-repairing functional component comprises polyacrylic acid, polyaspartic acid, a calcium ion supplement and a reaction accelerator. According to the application, polyacrylic acid and polyaspartic acid are used as complexing carriers of calcium ions, when concrete micro-cracks appear, the calcium ions are driven by concentration gradient to directionally migrate to the deep positions of the cracks, substitution reaction is carried out on the calcium ions and silicate radicals and carbonate radicals in pore liquid, and hydrated calcium silicate and calcium carbonate precipitates are generated to fill the cracks; meanwhile, the polymer is released again to enter the next cycle, and multiple times of self-repairing are achieved. The prepared anti-seepage concrete is high in anti-seepage grade, large in repairing depth, capable of effectively self-repairing for multiple times, easy in raw material obtaining, simple and convenient in process, controllable in cost and suitable for important engineering structures with high anti-seepage requirements such as underground engineering, tunnels, water conservancy dams and ocean platforms.

The application relates to the technical field of functional ceramics, and mainly relates to a ceramic material for a ceramic heater and a preparation method thereof. The ceramic material for the ceramic heater comprises the following raw materials: 90-100 parts by weight of alumina; 5-10 parts by weight of modified calcium silicate glass powder; 0.1-1 part by weight of yttrium oxide; 5-15 parts by weight of modified zirconium oxide; 0.1-1 part by weight of silicon dioxide; 0.1-1 part by weight of magnesium oxide; 1-5 parts by weight of a binder; and the preparation raw materials of the modified calcium silicate glass powder comprise quartz sand, limestone and alumina. The ceramic material for the ceramic heater provided by the application is excellent in thermal shock resistance, thermal conductivity, mechanical properties and the like, and can well adapt to the application scene of the ceramic heater.

The application discloses a kind of based on hydration calcium silicate and polycrystalline fiber composite board and preparation method, belong to inorganic fireproof heat insulation board technical field. Including board body, the board body is by following component weight parts constitutes: calcium source 25-45 parts, silicon source 30-55 parts, polycrystalline fiber 5-25 parts, interface modifier 0.5-3 parts, dispersing agent 0.1-1 part, foam stabilizer 0.1-0.5 parts, water 150-300 parts;The calcium source and silicon source hydrothermal reaction generate hydration calcium silicate crystal, the hydration calcium silicate crystal is mutually interwoven and forms porous matrix skeleton, the polycrystalline fiber disperses in the porous matrix skeleton, the hydration calcium silicate crystal in-situ growth on polycrystalline fiber surface, and forms chemical combination layer with polycrystalline fiber.The based on hydration calcium silicate and polycrystalline fiber composite board and preparation method of the application, the prepared board has excellent fireproof heat insulation performance, while having good mechanical toughness, impact resistance and high temperature long-term stability.

The invention discloses a fabricated frame-perlite mortar plate-reinforced foamed ceramic plate wallboard and a manufacturing method thereof, which are mainly used as a peripheral wall panel of a light steel frame structure. The composite wallboard is formed by assembling an inner leaf plate combined by an inner leaf frame light steel frame and a calcium silicate plate, an outer leaf plate combined by an outer leaf frame light steel frame and a reinforced foaming ceramic plate, and a sandwich perlite mortar plate. The inner and outer leaf frame light steel frame is formed by welding square steel pipes. The reinforced foamed ceramic plate is formed by compositing a foamed ceramic plate with a decorative surface layer and a high-ductility mortar plate with a shear key, and the high-ductility mortar plate is composed of a built-in steel wire mesh with the thickness not smaller than 20 mm, steel plate strips welded to the periphery of the steel wire mesh and a swallow tail meshing type frame on the periphery of the steel wire mesh. The fabricated frame light steel frame-perlite mortar plate-reinforced foamed ceramic plate combined wallboard has the integrated functions of structure, heat preservation, decoration and enclosure, has the technical characteristics of light weight, good anti-seismic and fire-resistant performance and convenience and rapidness in assembly and construction, and has two anti-seismic defense lines.

The invention relates to a method for binding sulfates in a body of water comprising sulfates, a calcined mixture prepared by calcining a mixture comprising calcium oxide and calcium alumina and / or calcium aluminate and cooling it to bind sulfates in a body of water, and the use of at least one element comprising CaO and mayenite supergroup and / or of a powder mixture and / or calcined mixture comprising at least one calcium aluminosilicate and / or at least one calcium aluminosilicate and / or calcium silicate for binding sulfates in a body of water.

The invention provides a calcium silicate board wet blank nondestructive separation method which comprises the following steps: S1, a vacuum adsorption device is designed to have at least two flexible adsorption areas with differential deformation characteristics, and the flexible adsorption areas are in surface contact with the surface of a wet blank; s2, sequential negative pressure adjustment is carried out on all the flexible adsorption areas through an air path control module, so that all the flexible adsorption areas generate differential deformation, the wet blank is driven to form non-uniform deformation in a preset form, and an adhesive layer of the wet blank and the bearing surface is damaged; s3, the wet blank is separated from the bearing surface and transferred to a target position; and S4, the negative pressure of each flexible adsorption area is relieved, so that the wet blank is separated from the adsorption state, and separation is completed. According to the invention, the differential deformation flexible adsorption area design is matched with the gas circuit control module to adjust the sequential negative pressure, so that the non-uniform deformation of the wet blank is realized to destroy the adhesive layer between the wet blank and the bearing surface, the purpose of non-destructive separation of the wet blank is achieved, the production efficiency is improved, local stress concentration is effectively avoided, and the product quality is improved.

The invention relates to a bone-like layered calcium silicate / tricalcium phosphate heterogeneous biological ceramic as well as a preparation method and application thereof. The preparation method of the bone-imitating layered calcium silicate / tricalcium phosphate heterogeneous biological ceramic comprises the following steps: (1) mixing calcium silicate powder, an additive and a solvent to obtain calcium silicate tape casting slurry; mixing the tricalcium phosphate powder, an additive and a solvent to obtain tricalcium phosphate tape casting slurry; (2) respectively carrying out tape casting on the calcium silicate tape casting slurry and the tricalcium phosphate tape casting slurry to obtain a calcium silicate green tape and a tricalcium phosphate green tape; (3) alternately laminating the calcium silicate green tape and the tricalcium phosphate green tape, and performing pressurization treatment to obtain a composite ceramic body; and (4) degumming and sintering the composite ceramic green body to obtain the bone-like layered calcium silicate / tricalcium phosphate heterogeneous biological ceramic.

The application discloses a concrete superfine powder admixture early strength type additive and a preparation method thereof. The application adopts the modified silicon dioxide filter sludge prepared from silicon dioxide filter sludge, dilute hydrochloric acid and nano alpha-Fe2O3 precursor, and then mixes the modified silicon dioxide filter sludge with triethanolamine, calcium nitrate, calcium hydroxide and a polycarboxylic acid high-performance water reducing agent to prepare the concrete admixture early strength type additive. After the modification of the nano alpha-Fe2O3 precursor, the surface activity of the silicon oxide compound in the filter sludge is improved, so that the silicon oxide compound can participate in the cement hydration reaction and the early strength is improved. Further, the synthesis of the early strength type calcium silicate increases the diversity of the early strength improvement of the cement, and the early strength agent effect of sodium sulfate existing in the filter sludge is fully utilized. The three early strength effects are combined with each other, and the potential functionality of the filter sludge in producing the early strength effect is fully tapped.