823 results about "Calcium silicate" patented technology

The invention relates to the field of agricultural microbial preparations, in particular to a complex microbial inoculant sustained-release granule for preventing and treating sweet potato stem nematode disease and a preparation method of the complex microbial inoculant sustained-release granule. Comprising the following components in parts by weight: 15-25 parts of paecilomyces lilacinus viable bacterium powder, 10-20 parts of bacillus thuringiensis viable bacterium powder, 10-20 parts of streptomyces viable bacterium powder, 5-15 parts of bacillus subtilis viable bacterium powder, 15-25 parts of charcoal, 5-15 parts of sodium alginate, 5-15 parts of humic acid, 5-10 parts of chitosan, 3-8 parts of calcium silicate, 1-5 parts of mannitol and 1-5 parts of sodium lignin sulfonate. Four microorganisms with complementary functions, namely paecilomyces lilacinus, bacillus thuringiensis, streptomycete and bacillus subtilis, are adopted, the sweet potato stem nematode disease is synergistically controlled through multiple action mechanisms, and the control effect and the stability are remarkably improved.

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 provides an alkali-salt composite excited low-carbon hydraulic cementing material based on an element compatibility method as well as a preparation method and application thereof, and relates to the technical field of building materials. Silica-aluminum solid waste (mainly providing SiO2 and Al2O3), a sulfate solid waste exciting agent (mainly providing alkali metal oxide and / or alkaline earth metal oxide and SO3) and an alkaline solid waste exciting agent (mainly providing an alkalinity environment required by a hydration reaction) are used as main materials to generate a certain content of hydration product ettringite crystals and C (N)-A-S-H gel, and a compatibility method is adopted for design. The relative contents of Ca, Si, Al and S in a cementing system are adjusted while the alkaline solid waste excitant and the sulfate solid waste excitant are compounded and cooperated to excite the silicon-aluminum solid waste, so that the contents of ettringite crystals and hydrated calcium silicate gel in the whole hydration system are controlled, and the early strength and the later strength of the alkali-salt compounded and excited low-carbon hydraulic cementing material are improved.

This invention discloses an ultra-high toughness multifunctional self-assembled C-S-H gel material and its preparation method. The ultra-high toughness multifunctional self-assembled C-S-H gel material includes a stacked core-shell structure layer, which is composed of core-shell structure particles. The core-shell structure particles have hydrated calcium silicate nanoparticles as the core and polyacrylic acid-acrylamide copolymer as the shell. The obtained ultra-high toughness multifunctional self-assembled C-S-H gel material has high toughness, good tensile deformation properties, and temperature-sensitive effect.

This invention relates to a detoxification method for simultaneously removing dioxins and heavy metals from waste incineration fly ash. The method includes fly ash pretreatment and simultaneous removal of dioxins and heavy metals. First, sodium and potassium salts are removed from the fly ash by immersion washing to avoid reducing the ability of the sintered products formed during high-temperature sintering to solidify heavy metals. Then, the pretreated fly ash is separated to obtain a solid phase, which is mixed with magnesium and / or calcium salts and subjected to high-temperature roasting. This allows the chlorine from the decomposition of dioxins in the fly ash to react with the heavy metals to form gaseous heavy metal chlorides, thus removing the heavy metals from the fly ash. During the high-temperature roasting process, the magnesium and / or calcium salts react with the ash in the fly ash to form calcium silicate and / or magnesium silicate, enhancing the solidification ability of the internal lattice of the fly ash sintered products. After detoxification treatment of waste incineration fly ash using this method, no heavy metals Hg, Pb, Cd, Cu, and Ni were detected in the fly ash leachate, significantly reducing the leaching risk of residual heavy metals in the fly ash.

The invention provides an anti-oxidation coating for an anode carbon block and a preparation method of the anti-oxidation coating, and belongs to the technical field of anode anti-oxidation coatings. Comprising an inner-layer coating and an outer-layer coating, the inner coating is prepared from the following components in parts by weight: 45 to 55 parts of aluminum oxide, 3 to 4 parts of silica sol, 4 to 5 parts of aluminum phosphate, 0.5 to 1.0 part of boron nitride nanosheet, 0.5 to 1.0 part of CeO2, 3 to 5 parts of TiB2 graphene and 1.2 to 1.5 parts of polyacrylic acid dispersing agent; the outer-layer coating comprises the following components in parts by weight: 10-15 parts of aluminum oxide, 6-9 parts of silicon carbide whiskers, 8-10 parts of aluminum calcium magnesium silicate glass powder, 1-2 parts of boron nitride nanosheets, 1-2 parts of Y2O3, 0.5-1.0 part of CeO2, 1.5-2.5 parts of aluminum phosphate and 2-3 parts of mullite fibers. The high-temperature stability and environmental protection property of the coating can be remarkably improved, meanwhile, the gradient structure design is introduced, conductivity and permeability resistance are both considered, and the pole changing period is prolonged.

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 relates to the technical field of preparation of high polymer materials and intelligent response materials, in particular to a preparation method of polyacrylamide for treatment. And constructing a quaternary polymerization system with acrylamide, a temperature-sensitive monomer and a zirconium-based metal organic framework-graphene quantum dot composite material. Magnetic response interpenetrating network gel is formed by induction of a photo-magnetic synergistic field, bacterial cellulose nanofibrils and a calcium silicate layered structure are introduced through a biomimetic mineralization technology, and the hierarchical porous carrier is prepared by combining a microfluidic crushing technology and a supercritical drying technology. Finally, through an intelligent regeneration mechanism of bimetal coordination activation and high-frequency magnetic field triggering, the material is endowed with multiple stimulation response characteristics, high adsorption capacity and in-situ regeneration capacity, and the mechanical strength and the salt resistance are remarkably improved through a pearl-layer-like micro-nano laminated structure. The method is suitable for industrial wastewater advanced treatment and emergency pollution repair scenes.

The invention provides a hot-pressed aluminum composite decorative plate and a preparation method thereof, and relates to the technical field of building materials.When the aluminum composite decorative plate is manufactured, the interior of a calcium silicate plate is permeated through a reinforcing agent in advance, and then the calcium silicate plate with the uneven bonding plane is leveled; by means of the pretreatment, the drawing strength of the interior of the calcium silicate board is strengthened in advance, the strengthened calcium silicate board is tightly bonded with the leveling layer, then the strengthened calcium silicate board is leveled, the bonding surface of the formed pretreated calcium silicate board is smooth, the bonding binding force is improved, and therefore when the pretreated calcium silicate board is bonded with the aluminum veneer, the bonding strength of the aluminum veneer is improved. The bonding is tighter, so that the internal stress generated by the aluminum veneer is far smaller than the bonding strength of the bonding surface of the aluminum veneer and the pretreated calcium silicate board, and the situation that the aluminum veneer is heated to swell due to the fact that the surface of the calcium silicate board is uneven and the temperature difference of the external environment is large is avoided.

The invention relates to the technical field of building construction, and provides a high polymer grouting material-concrete interface molecular model construction method which comprises the following steps: constructing an initial PU model, and performing molecular dynamics simulation and full-atom simulation on the model; performing energy minimization and dynamic balance K by adopting an NVT and NPT ensemble; performing crosslinking simulation on the PU model, performing multiple crosslinking cycles at 300K by modifying chemical bonds and adjusting crosslinking degree, and loosening to a stable state under NPT ensemble; constructing a calcium silicate hydrate model, and performing molecular dynamics simulation by using a CSH-FF force field; and combining the PU model with the calcium silicate hydrate model, and performing energy minimization and dynamic balance to complete model construction. Through a molecular dynamics simulation method, the limitation of a traditional experimental technology is broken through, and scientific theoretical support and practical guidance are provided for design of a high polymer grouting material and enhancement of a concrete structure.

The invention relates to the technical field of medical materials, in particular to a composite root canal filling agent premixed with a calcium silicate-niobium compound as well as a preparation method and application of the composite root canal filling agent. The composite root canal filling agent comprises (a) a calcium silicate compound, (b) a phosphate compound, (c) a calcium compound, (d) a niobium compound, (e) a radiation-resistant material, (f) a water-miscible non-aqueous phase solvent and (g) an organic matter, the total mass of the component (a), the component (b), the component (c), the component (d), the component (e) and the component (g) accounts for 60-95% of the total mass of the filling agent, and the total mass of the component (a), the component (b), the component (c), the component (d), the component (e) and the component (g) accounts for 20-30% of the total mass of the filling agent. And the component (f) accounts for 5-40% of the total mass of the filling agent. The filling agent is fast in solidification, good in biological activity, excellent in antibacterial performance and convenient to popularize and apply.

The invention relates to the technical field of functional polymer materials, in particular to an inorganic crystal carbonization alleviator as well as a preparation method and application thereof. The inorganic crystal carbonization alleviator is prepared from raw materials including a solid component and a liquid medium, wherein the mass ratio of the liquid medium to the solid component is (1: 0.5)-(1: 3); the solid component comprises a component containing calcium carbonate and / or calcium silicate and a component containing silicon dioxide, and the mass ratio of the component containing calcium carbonate and / or calcium silicate to the component containing silicon dioxide is (50-80): (20-50). According to the inorganic crystal carbonization alleviator, the calcium silicate mineral is prepared from the calcium carbonate-containing and / or calcium silicate-containing material and the silicon dioxide-containing material, the carbonization resistance of the material is remarkably improved, and the inorganic crystal carbonization alleviator has the advantages of being wide in raw material source and low in cost and can improve and enhance the carbonization resistance when being applied to Portland cement and hypersulfate cement systems.

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 belongs to the technical field of building materials, and particularly relates to a low-calcium carbon sequestration cementing material as well as a preparation method and application thereof. The low-calcium carbon sequestration cementing material disclosed by the invention is prepared from the following main mineral components in percentage by weight: 55 to 80 percent of calcium silicate, 15 to 35 percent of tricalcium disilicate and 5 to 15 percent of gehlenite. The low-calcium carbon-sequestration cementing material has excellent carbonization activity, can seal a large amount of carbon dioxide, can obtain excellent mechanical properties in a short time, and provides a new way for solving the problem of carbon emission in the cement industry and recycling industrial solid wastes such as magnesium slag and fly ash.

The invention discloses a degradable multilayer polymer foaming material and a preparation method thereof, and belongs to the technical field of multilayer polymer foaming materials. The degradable multilayer polymer foaming material prepared by the invention consists of an upper surface layer, a lower surface layer and a core layer arranged between the upper surface layer and the lower surface layer, the upper surface layer and the lower surface layer comprise the following components in parts by mass: 50-80 parts of PBAT, 20-50 parts of PLA, 3-8 parts of a foaming agent, 5-15 parts of a modified epoxy blocking agent, 0.5-2 parts of an epoxy chain extender, 1-5 parts of calcium silicate, 3-10 parts of montmorillonite, 0.5-2 parts of a lubricant and 0.2-1 part of an antioxidant; the core layer is prepared from the following components in parts by mass: 40 to 70 parts of PBAT, 30 to 60 parts of PLA, 5 to 12 parts of a foaming agent, 0.5 to 2 parts of an epoxy chain extender, 1 to 5 parts of calcium silicate, 3 to 10 parts of montmorillonite, 0.5 to 3 parts of talcum powder, 0.5 to 2 parts of a lubricating agent and 0.2 to 1 part of an antioxidant. According to the multilayer polymer foaming material, the functional characteristics of each layer are fully exerted, so that the whole material has excellent mechanical property, foam structure and degradation property and remarkable barrier property.

The invention belongs to the technical field of solid waste resource utilization and inorganic material synthesis, and relates to a method for reducing the water content and particle size of active calcium silicate. According to the method, powdery quicklime or ground carbide slag is used as a calcium source, the reaction activity of the calcium source is improved through steam activation, then the calcium source is added into desiliconization liquid containing sodium silicate in batches, a reaction is carried out under the temperature control and stirring conditions, and finally, hot water ultrasonic washing and drying are carried out, so that an active calcium silicate product with low water content and fine particle size is prepared. According to the process, the problems of high water content, large particle size, impurity residues and the like in the traditional process are effectively solved by accurately controlling the Ca / Si molar ratio, temperature sectional reaction and ultrasonic-assisted washing. According to the method, the post-treatment burden of the product is remarkably reduced, the whiteness and the purity are improved, high-value utilization of high-calcium solid wastes such as the carbide slag is also realized, and the method has good industrial popularization prospects and environmental benefits.

The present application relates to a kind of sea sand chloride solidifying agent and its application method, the solidifying agent includes solidifying agent A and solidifying agent B;The solidifying agent A is proportioned according to the raw material of weight parts as follows: modified hydrotalcite 2~5 parts, ultrafine silica powder 0.05~0.2 parts, water 30~120 parts;The solidifying agent B is proportioned according to the raw material of weight parts as follows: metakaolin 1~4 parts, calcium hydroxide 0.1~0.3 parts, water 45~180 parts.The present application is attached to the surface of sea sand by modified hydrotalcite with ion adsorption effect and forms inner solid layer, can effectively absorb the chloride ion released by sea sand;While using calcium hydroxide to excite metakaolin with sheet shape and form stable outer solid layer, can effectively prevent the shedding of inner solid layer material;The generated hydrated calcium silicate and hydrated calcium aluminate gel can also absorb the chloride ion solidified from the escape of inner solid layer, further improve the chloride ion solidification effect.

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 wet blank sucker, which belongs to the technical field of calcium silicate board production and comprises a chassis, a plurality of longitudinal beams and a plurality of cross beams, the longitudinal beams and the cross beams are fixedly connected to the chassis, a plurality of exhaust holes are arranged above the chassis, the chassis is fixedly connected with a panel, the panel is connected to the longitudinal beams and the cross beams in an abutting mode, and the panel is provided with a plurality of suction holes. The longitudinal beams and the cross beams are provided with a plurality of air passing holes, the longitudinal beams and the cross beams of the base plate are provided with air passing openings, when air in the base plate is exhausted through the exhaust holes, evenly-distributed negative pressure can be formed in the base plate, the panel is provided with a plurality of suction holes, average adsorption force is generated on wet blanks, the wet blanks cannot be damaged, and the middle of the base plate protrudes upwards. The air passing hole in the middle of the cross beam is a long hole, so that the negative pressure in the middle of the base plate is relatively concentrated, the suction force of the suction hole in the middle of the panel is relatively larger, the middle cannot fall when a wet blank is adsorbed, and the six exhaust holes are uniformly distributed in the two sides of the base plate, so that the negative pressure in the base plate is more uniform, and the negative pressure in the middle is prevented from being too concentrated.

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.

The invention discloses a white UV coating easy to deeply cure and application of the white UV coating in a calcium silicate board coating. The white UV coating easy to deeply cure is prepared from the following components in parts by weight: 30 to 40 parts of polyurethane acrylate, 5 to 25 parts of reactive diluent, 10 to 20 parts of silane modified acrylic resin, 20 to 30 parts of nano TiO2 coated SiO2 with a core-shell structure and 3 to 5 parts of free radical photoinitiator. The white UV coating easy to deeply cure, which is prepared by mixing the raw materials, can form a high-strength, high-curing-rate and whiteness-adjustable UV curing coating on the surface of a calcium silicate board, can solve the industrial problem that the surface of a thick coating on the surface of the calcium silicate board is dry and the inside of the thick coating is not dry, and has a good application prospect in the field of building materials.

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 invention discloses a method for separating silicon-containing impurities from re-quicklime, and relates to the technical field of separation of silicon-containing impurities from re-quicklime, and the method comprises the following steps: S1, mixing calcined re-quicklime with water according to a mass ratio of 1: (1-3) to form re-quicklime slurry, and reacting calcium oxide in the re-quicklime with water to generate calcium hydroxide; s2, the reaction is maintained for 30-90 minutes under the stirring condition, and the reaction temperature is controlled to be 40-80 DEG C; s3, standing and settling after stirring is stopped, so that calcium hydroxide with lower density floats upwards, and silicon-containing impurities with higher density, including silicon dioxide and calcium silicate, are settled; s4, separating the upper-layer calcium hydroxide slurry from the lower-layer silicon-containing precipitate by adopting a gravity separation, scraping or mechanical filtration mode to obtain a re-quicklime product after silicon removal, compared with a traditional acid pickling or single screening process, the method does not introduce an acidic medium, does not need high-energy-consumption equipment, is simple in process and environment-friendly, and is suitable for continuous industrial production.

The utility model relates to the technical field of building decoration, and discloses an anti-crack suspended ceiling structure which comprises a main keel. According to the anti-cracking suspended ceiling structure, when a suspended ceiling is mounted, the supporting rods, the connecting rods and the mounting plate are arranged, the mounting plate is mounted in the center of the suspended ceiling plate, the contact area between the suspended ceiling and a keel can be increased, and the suspended ceiling can be effectively prevented from deforming and cracking after being used for a long time; after a suspended ceiling is installed, the joint of the two calcium silicate boards is coated with the first water-resistant putty layer, the second water-resistant putty layer is embedded after putty is dried, the flexible putty layer is embedded after putty is dried, the first polyurea waterproof coating and the second polyurea waterproof coating are coated after putty is dried, and then the glass fiber net is installed on the polyurea waterproof coatings; and finally, after the coating is dried, the ceiling board begins to be subjected to large-area puttying and finish coating brushing, through arrangement of multiple coatings, the moisture resistance and deformation resistance of the anti-cracking ceiling structure are improved, and meanwhile cracking can be effectively prevented.

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.