652results about How to "Improve fire resistance" patented technology

The invention relates to the technical field of insulating materials, in particular to a flame-retardant high-strength insulating material and a preparation process thereof. The insulating material comprises the following components in parts by weight: 50-60 parts of polyvinyl chloride, 20-40 parts of crosslinked polyethylene, 10-15 parts of an ethylene-vinyl acetate copolymer, 20-40 parts of a flame retardant, 5-15 parts of talcum powder, 10-20 parts of calcium carbonate, 6-12 parts of a compatilizer and 3-8 parts of an antioxidant. The flame retardant is prepared by taking ammonium polyphosphate as an acid source, polydopamine as a charring agent and modified graphene oxide as a reinforcing agent, the flame retardant is added into polyvinyl chloride and a crosslinked polyethylene insulating material base material, and combined with the combined action of an ethylene-vinyl acetate copolymer, talcum powder, calcium carbonate, a compatilizer and an antioxidant, the flame retardant property of the insulating material base material is improved, and the flame retardant property of the insulating material base material is improved. The prepared insulating material not only has excellent mechanical property, but also has excellent flame retardant property, so that the service life of the material is prolonged.

The invention discloses a heat-insulating ceramic fiber board and a preparation method thereof. The heat-insulating ceramic fiber board comprises the following raw materials in parts by mass: 96-114 parts of aluminum silicate fiber mixed cotton, 4-6 parts of zirconium oxide fiber, 9-12 parts of alkaline silica sol, 12-15 parts of a water-based resin dispersant, 8-10 parts of aluminum oxide fine powder and 5-8 parts of high-temperature ceramsite sand. Wherein the aluminum silicate fiber mixed cotton is a mixture composed of aluminum silicate fiber raw cotton, aluminum silicate fiber broken cotton and aluminum silicate short fibers. The heat insulation ceramic fiber board is high in strength, long in service life, low in heat conductivity coefficient and good in heat insulation performance.

The invention relates to the technical field of fire extinguishing materials, and discloses an active fire extinguishing microcapsule, a preparation method and application thereof, an ultraviolet curing resin plate and a preparation method thereof. The microcapsule has a core-shell structure, a core material is perfluoro (2-methyl-3-pentanone) (PFMP), and the microcapsule is used as an efficient fire extinguishing agent and is suitable for inhibiting the heat rise rate of an ultraviolet curing polymer in thermal runaway and fire scenes; and the shell layer is a polymer wall material formed by gelatin, has a certain thickness and can be broken at a preset temperature. Through simple condensation, PFMP is used as a core material for microencapsulation, and the microcapsule with specific particle size distribution is prepared, so that the microcapsule can quickly release a fire extinguishing agent under a high-temperature condition, and flames are effectively inhibited.

The invention discloses a porcelainized expansion type fireproof heat-insulating coating and a preparation method thereof, and relates to the technical field of fire prevention, and the fireproof heat-insulating coating comprises an inner coating and an outer coating; the preparation method comprises the following steps: S1, weighing the raw materials of the component A and the component B; s2, preparing the component A; s3, preparing a component B; s4, the surface of the steel structure is coated with the component A, and an inner coating of the fireproof heat-insulating coating is obtained after normal-temperature drying; and continuously coating the surface of the dried inner coating with the component B through a spraying or brushing method, and drying at normal temperature to obtain the ceramifiable expansive fireproof heat-insulating coating. A porcelainized reaction and an intumescent flame-retardant system are combined to protect the steel structure material from two aspects of efficient flame retardance and high-temperature heat insulation, and the effect is excellent; a nitrogen-phosphorus synergistic flame retardant is used for actively inhibiting the flame combustion process, a high-temperature expansion layer formed by expansible graphite and a vitrifiable heat insulation layer formed by ceramic forming filler are used for greatly improving the high-temperature stability and heat insulation efficiency of a carbon layer, and the fire endurance of a steel structure is prolonged.

The invention relates to the technical field of flame retardance, and discloses a flame-retardant coating and a preparation method thereof.The flame-retardant coating is obtained by adding phenolic resin, polycarbonate, phosphorus-containing modified phenolic resin, boric acid-containing benzoxazine, an organic silicon resin defoaming agent, a propylene glycol film-forming agent and water into a stirrer and stirring. The flame-retardant coating contains a large amount of anacardol, long chains in the anacardol can also be crosslinked to form a net-shaped structure, a net-shaped carbon skeleton structure is formed under high-temperature carbonization, degradation products are inhibited during combustion, and the flame-retardant coating has good fire resistance; wherein oxazolidinone generated by reaction of an epoxy group of epoxidized phenolic resin and an isocyanate group of hexamethylene diisocyanate is a heterocyclic ring with very high heat resistance and also plays a role in synergistic fire resistance; the flame-retardant coating contains a large amount of phosphorus elements, sulfur elements and nitrogen elements, has a good flame-retardant effect, and achieves a synergistic flame-retardant effect.

The invention provides an efficient environment-friendly silicon-based foam extinguishing agent synergistically compounded by a multi-silicon surfactant and a preparation method of the efficient environment-friendly silicon-based foam extinguishing agent. The cleaning agent is prepared from raw materials in percentage by mass as follows: 5%-35% of an ionic silicon surfactant, 5%-35% of a nonionic silicon surfactant, 0.1%-3% of a polysaccharide foam stabilizer, 1%-10% of a cosolvent, 0.1%-10% of a preservative, 1%-10% of an antifreeze agent, 0.1%-5% of a regulator and the balance of deionized water. According to the invention, the ionic silicon surfactant and the nonionic silicon surfactant are compounded for use, hydrophobic and oleophobic tetrasiloxane groups and trisiloxane groups are used as spreading agents of an oil-water interface, and the formula of the foam extinguishing agent only contains the silicon surfactant; the liquid fuel fire extinguishing agent does not contain a forbidden fluorocarbon surfactant and a hydrocarbon surfactant with an oleophylic end, so that the environmental hazard of the fluorocarbon surfactant is completely eradicated, the oleophylic property of the foam fire extinguishing agent is eliminated, and the liquid fuel fire can be extinguished. The invention has positive significance on environment protection, human health protection and sustainable development of foam fire extinguishing technology.

The invention belongs to the technical field of coatings, and particularly relates to an irradiation-resistant fireproof coating and a preparation method thereof. The radiation-resistant fireproof coating comprises a component A and a component B. The component A comprises, by weight, 15-35 parts of organosilicon modified epoxy resin, 5-10 parts of an active diluent, 20-50 parts of a dehydration char-forming catalyst, 3-10 parts of a foaming agent, 5-10 parts of a flame retardant, 0.1-0.5 part of expanded graphite, 5-10 parts of refractory fibers and 3-15 parts of a radiation-resistant filler. The radiation-resistant filler comprises silane coupling agent modified nano barium sulfate and micron boron carbide; and the component B is an amine curing agent. According to the radiation-resistant fireproof coating and the preparation method thereof, by adopting the specific silane coupling agent modified micro-nano radiation-resistant filler, the radiation-proof performance uniformity and the fire resistance after radiation resistance of the coating are effectively improved, and the radiation-resistant fireproof coating can be widely applied to nuclear power plants and various nuclear industry facilities.

The invention discloses a preparation method of a prefabricated autoclaved aerated concrete slab made of a solid-waste-based sulfur-aluminum-iron binding material. The preparation method comprises the following steps: preparing dry substances of the material; carrying out solid waste pretreatment by a mechanical ball milling method; adding ardealite, aluminum ash, coal gangue, fly ash, steel slag and carbide slag at the moment; calcining and directionally mineralizing after pretreatment; secondarily grinding the intermediate material; adding the secondarily ground intermediate material, cement, aluminum powder and water, and foaming; after the slurry is thickened, multi-frequency vibration is carried out in the pouring process; after pouring is completed, multi-temperature curing is conducted; after curing is completed, the highly-doped solid waste-based functional prefabricated autoclaved aerated concrete slab product is obtained. According to the autoclaved aerated concrete slab, dependence on natural resources is effectively reduced, meanwhile, carbon dioxide emission in the production process is reduced, and meanwhile, the compressive strength and the breaking strength of the autoclaved aerated concrete slab are improved; the service life of the material is prolonged; the preparation process is simplified, and the production difficulty and cost are reduced.

The invention relates to the technical field of building materials, and discloses fire-resistant decoration waste exterior wall external thermal insulation mortar and a preparation method thereof. The fire-resistant decoration waste exterior wall external thermal insulation mortar comprises the following raw material components in parts by weight: 60-410 parts of cement; 120 to 550 parts of decoration waste recycled aggregate; 36 to 75 parts of SiO2 aerogel; 8 to 17 parts of a silane coupling agent; 1.3 to 2.1 parts of dispersible latex powder; 0.5 to 1.0 part of methyl cellulose; 7-15 parts of a water reducing agent; 0.2 to 0.4 part of an air entraining agent; and 120 to 180 parts of water. According to the invention, the low-cost and high-strength decoration waste recycled aggregate is used for partially replacing expensive and low-strength aerogel, so that the thermal insulation performance of the mortar is ensured, and the material cost is greatly reduced; the decoration garbage exterior wall external thermal insulation mortar can resist high-intensity fire disasters with the highest temperature of 1000 DEG C and the fire receiving time of 2.5 h, and can be applied to exterior wall external thermal insulation systems of high-rise and super high-rise buildings with high fire extinguishing difficulty.

The invention discloses a production method of nano-silicon composite fireproof glass, which comprises the following steps: compounding amino nano-silicon dioxide with a modified zinc-aluminum flame retardant to prepare a coated silicon-based filler, and compounding the coated silicon-based filler with nickel-titanium bimetal MOF to obtain a composite silicon-based flame-retardant filler; the preparation method comprises the following steps: mixing a mixed solution of silica sol, water-soluble silicone oil, a composite silicon-based flame-retardant filler, potassium hydroxide and sodium hydroxide with ethylene glycol, filling laminated glass with the mixed solution, and sealing and curing to obtain the nano-silicon composite fireproof glass. The nano-silicon composite fireproof glass has high light transmittance and high fire resistance, the zinc-aluminum flame retardant and the nickel-titanium bimetal MOF which have flame retardance are compounded on the nano-silicon dioxide to obtain a composite silicon-based flame-retardant filler, and the zinc-aluminum flame retardant and the nickel-titanium bimetal MOF generate a synergistic effect through compounding of a multi-layer core-shell structure, so that the flame-retardant performance of the nano-silicon composite fireproof glass is improved, and the flame-retardant performance of the nano-silicon composite fireproof glass is improved. The flame-retardant and fire-resistant performance of the composite silicon-based flame-retardant filler is improved, and the influence of the flame retardant on the light transmission of the nano-silicon composite fireproof glass is reduced.

The invention relates to a shape memory polyimide composite material with a spider-silk-like microstructure and a preparation method and application thereof. According to the method, the composite material is designed by coupling the spider-silk-like microstructure, shape memory polyimide, a flame retardant and an electromagnetic shielding two-dimensional intercalation compound. Conductive polyaniline and transition metal carbon / nitride are subjected to an intercalation reaction to prepare a Ti3C2Tx-coated PANI intercalation compound, then the Ti3C2Tx-coated PANI intercalation compound is compounded with SMPI to serve as a spider-silk-like microstructure to enhance the mechanical strength and electromagnetic shielding performance of a resin matrix, and when the thickness of the SMPI composite material is 100 micrometers, the electromagnetic shielding effectiveness of the SMPI composite material in the X wave band exceeds 25 dB, and 99% or above of incident microwaves are effectively shielded. In addition, the flame retardant grade of the composite material reaches V0 grade, the limit oxygen index is 39.1%, the composite material also has high temperature resistance and shape memory characteristics, the shape fixation rate is 96%, and the shape recovery rate is 97%. The composite material not only can eliminate electromagnetic interference, but also can resist flame, can be automatically deformed, and is applied to the fields of self-adaptive deformation thermal management electromagnetic shielding devices, intelligent wearable equipment and the like.

The invention discloses a modified ceramic flame-retardant polyphenyl ether insulated wire and cable material which is prepared from the following raw materials in percentage by mass: 15%-20% of polyphenyl ether resin, 10%-20% of SEBS thermoplastic elastomer, 4%-8% of polypropylene resin, 3%-8% of maleic anhydride grafted material, 5%-20% of melamine cyanurate, 5%-15% of aluminum diethylhypophosphite, 1%-4% of 2, 3-dimethyl-2, 3-diphenyl butane, 10%-30% of compound ceramic powder and 1%-4% of antioxidant. The insulated wire and cable material disclosed by the invention has outstanding electrical insulativity, flowability and water resistance, relatively good wear resistance and electrical performance, good dimensional stability and relatively high heat resistance; the flame-retardant property is good, and the self-extinguishing property is realized; and the ceramic forming property after high-temperature combustion is excellent, and the ceramic still has excellent insulating property after being formed.

The invention relates to the technical field of fire-resistant cables in a dynamic environment, and provides a fire-resistant cable suitable for a floating power generation ship in a dynamic environment, which comprises a cable core and a cable outer protection layer, a plurality of cable cores are arranged in the cable outer protection layer, after the cable cores are arranged in the cable outer protection layer, a filling layer is arranged in gaps among the cable cores, and the filling layer is formed by fixedly filling a plurality of strands of filling ropes in the gaps through a water-blocking material; the filling layer can effectively fill gaps among the cable cores, the multiple strands of filling ropes are fixedly filled in the gaps through the water-blocking material, and the filling ropes in the filling layer can absorb water and expand to fill the gaps, so that the water-blocking performance is further improved, and the service life of the cable is prolonged. Through the structure, the structural stability of the cable can be enhanced, the tensile and bending resistance performance is improved, the fireproof performance of the cable is improved, and the water-blocking, moisture-proof and anti-corrosion performance is enhanced.

The invention belongs to the technical field of polymer composite materials, and particularly relates to a high-strength corrosion-resistant ABS composite flame-retardant material and a preparation method thereof. The ABS composite flame retardant material is prepared from the following raw materials in parts by weight: 60 to 75 parts of acrylonitrile-butadiene-styrene, 10 to 15 parts of glass fiber, 0.5 to 1 part of gamma-aminopropyltriethoxysilane, 8 to 12 parts of phosphorus-nitrogen flame retardant, 1 to 3 parts of nano aluminum oxide, 0.5 to 1 part of potassium perfluorooctane sulfonate, 1 to 3 parts of epoxy modified graphene oxide and 5 to 8 parts of modified nano montmorillonite. Through the synergistic effect of the epoxy silane modified graphene oxide and the long-chain alkylsilane modified nano montmorillonite, the mechanical property, the corrosion resistance and the flame retardant effect of an ABS matrix are remarkably enhanced. The modified material maintains toughness under high strength, effectively avoids embrittlement, and shows excellent impact resistance and environmental protection property.

The invention discloses a cable with a fire-resistant function, and belongs to the technical field of cables, the cable comprises a cable, the upper end and the lower end of the cable are detachably connected with an upper connector and a lower connector respectively, the cable can be connected through mutual cooperation of the upper connector and the lower connector, the cable comprises a cable core with a conductive function, and the cable core is connected with the cable. And an insulating layer is wrapped outside the wire core. According to the invention, when the cable is burnt by fire or the cable is short-circuited to generate high temperature, a flame retardant in the fireproof channel is heated, the flame retardant expands along with the heating of the flame retardant, and part of the flame retardant enters the butt joint groove or the butt joint plug through the first one-way channel so as to break the negative pressure state in the butt joint groove; thus, the upper connector and the lower connector are separated, cable separation is completed, fire spreading is avoided, and then the locking sleeve is rotated to connect the connecting cylinder with the cable.

The invention relates to the field of building and industrial fire prevention, and discloses a fireproof wall thermal insulation material. The material comprises the following components in percentage by weight: 15-25% of basalt fiber, 10-15% of glass fiber, 3-7% of carbon fiber, 5-10% of ceramic fiber, 8-12% of a modified silicate binder, 3-7% of a bio-based resin binder, 5-10% of a phenolic resin binder, 16-31% of a fireproof additive and 10-20% of a heat insulation additive. By innovatively introducing the composite material of various fibers such as basalt fibers, glass fibers, carbon fibers and ceramic fibers, the mechanical strength and fire resistance of the thermal insulation material are remarkably improved, the composite fiber material shows more excellent performance in the aspect of strength, and meanwhile, the qualitative leap in the aspect of fire resistance is also realized. And stable operation and reliable performance of the thermal insulation material in an extremely high-temperature environment are ensured.

The invention discloses a tundish cover castable, and relates to the technical field of tundish refractory materials. The tundish cover castable is prepared from the following raw material components in percentage by mass: 7.8 to 9.6 percent of alumina of 8 to 5mm, 2.6 to 4.3 percent of alumina of 5 to 3mm, 2.6 to 4.3 percent of alumina of 1 to 0mm, 17.4 to 20.8 percent of alumina of 200 meshes, 9.6 to 13 percent of mullite of 5 to 3mm, 22.6 to 26 percent of mullite of 3 to 1mm, 9.6 to 13 percent of mullite of 1 to 0mm, 7 to 8.7 percent of mullite of 200 meshes, 2.6 to 3.5 percent of composite binding agent, 0.8 to 1.7 percent of aluminum silicate, 0.05 to 0.07 percent of SiC nanowire, 0.2 to 0.3 percent of aluminum titanate and the balance of water. The invention discloses a tundish cover castable which comprises the following components in percentage by weight: 0.4-0.7% of alumina micro powder, 0.08-0.11% of sodium tripolyphosphate, 2.6-3.5% of silica fume, 0.87% of steel fiber and 1.3-1.7% of high-alumina cement. Compared with a traditional process, the tundish cover castable has the advantages that the overall performance of the tundish cover castable is remarkably improved, the breaking strength and compression strength of the castable are effectively enhanced, the service life is remarkably prolonged, and the production cost is reduced. And the production cost is greatly saved, and the economical efficiency and the operation rate of continuous casting operation are improved.

The invention provides a preparation method of a high-expansion phosphoramidated natural polysaccharide flame retardant. The preparation method comprises the following preparation steps: S1, carrying out amination treatment on a phosphoramidated reagent to obtain a precursor solution; and S2, adding the natural polysaccharide into the precursor solution, and carrying out phosphoramidation reaction to obtain the high-expansion phosphoramidated natural polysaccharide flame retardant. According to the invention, the natural biomass is used as the raw material, and the water is used as the solvent, so that the prepared flame retardant has the advantages of high expansion rate, low environmental hazard, high matrix compatibility and excellent flame retardance. Moreover, on one hand, the flame retardant prepared by the invention has higher expansion rate and fire endurance, and on the other hand, the heat released by the flame retardant during combustion can be reduced and inhibited, so that the harm to the environment is reduced, and the practical effect of the flame retardant prepared by the invention during use is further ensured.

The present invention discloses a fireproof steel structure for construction, which belongs to the technical field of building materials. A fireproof steel structure for construction, comprising a fireproof steel body, characterized in that a fireproof coating is provided on the outer surface of the fireproof steel body, a thermal insulation layer is provided on one side of the fireproof coating, a cavity pipe is provided inside the fireproof steel body, a spray pipe is provided on the outer surface of the fireproof steel body, and a first spray head is fixedly connected to one side of the spray pipe; the present invention can effectively prevent fire and resist high temperature by providing a fireproof coating, a thermal insulation layer and a cavity pipe, thereby increasing the fire resistance time, providing precious time for disaster relief and fire fighting, avoiding the deformation of the steel structure due to the failure to put out the fire in time, ensuring the structural safety of the factory building, and thus effectively reducing the loss, and can generate flowing water by providing a spray pipe and a connecting pipe.

The invention relates to the technical field of investment casting of hollow castings, in particular to a low-deformation high-strength ceramic core and a preparation method thereof.The low-deformation high-strength ceramic core comprises ceramic core powder, and the ceramic core powder comprises, by mass, 30-85% of high-temperature calcined high-bauxite powder, 10-50% of electric smelting mullite powder and 1-20% of alumina powder. According to the ceramic core and the preparation method thereof disclosed by the invention, the ceramic core prepared by accurately proportioning the high-temperature calcined high-alumina bauxite powder, the electrically-fused mullite powder and the alumina powder and combining the synergistic effect of the toughening agent, the pore forming agent and the plasticizer has relatively low deformation and relatively high high-temperature strength, and can meet the requirements of hollow directional / single-crystal castings and polycrystalline hollow castings which are poured at high temperature.

The invention relates to the technical field of fire extinguishing agents, and discloses a fluoride-free anti-solubility foam fire extinguishing agent and a preparation method thereof.The fluoride-free anti-solubility foam fire extinguishing agent comprises a hydrocarbon surfactant, a carboxyl modified organosilicon surfactant, a foam stabilizer, a cosolvent, water and a pH regulator; the carboxyl modified organic silicon surfactant is obtained by modifying an organic silicon surfactant by using maleic anhydride; the foam stabilizer contains xanthan gum and a component A, according to the invention, the organosilicon surfactant is modified, so that the obtained carboxyl modified surfactant has good surface activity and water solubility; xanthan gum and a component A (polyethylene oxide-polypropylene oxide-polyethylene oxide and other substances) are compounded to serve as a foam stabilizer, so that the foam stability and the anti-dissolving performance can be improved, and the foam stabilizer also has temperature-sensitive-thermal response performance; under the combined action of the components, the fire extinguishing agent provided by the invention has excellent fire extinguishing performance and can quickly extinguish non-polar fuel and polar fuel.

The invention provides refractory concrete and a preparation method thereof, and belongs to the technical field of concrete. The preparation method comprises the following steps: modifying basalt fiber, modifying granite stone powder, grafting and mixing. The step of modifying the granite stone powder comprises the following steps: putting the granite stone powder into an ethanol solution, adding sorbitol laurate and polyoxyethylene sorbitan monolaurate, stirring at the stirring temperature of 46-50 DEG C, uniformly stirring, adding threonine, carrying out ball milling treatment for 26-30 minutes at the ball milling rotating speed of 114-125rpm according to the ball-to-material ratio of (3-5): 1, and after the ball milling is finished, cooling to room temperature to obtain the modified granite stone powder. Filtering and drying to obtain modified granite stone powder; the particle size of the granite stone powder is 135 to 145 nm; the mass concentration of the ethanol solution is 45-50%; the mass ratio of the granite stone powder to the ethanol solution to the sorbitol laurate to the polyoxyethylene sorbitan monolaurate to the threonine is (8.3 to 8.7) to (90 to 97) to (1.0 to 1.2) to (1.1 to 1.5) to (4.5 to 4.9); the prepared refractory concrete is high in strength, excellent in water permeability resistance, good in high-temperature corrosion resistance and low in linear shrinkage rate.

The utility model relates to a medium-voltage fire-resistant cable. The medium-voltage fire-resistant cable comprises a cable core and a protection unit. The cable core comprises a wire core, a first wrapping layer and a filling layer; the protection unit is arranged on the periphery of the filling layer and sequentially comprises an outer sheath, a second wrapping layer, an armor layer, a first oxygen isolation layer, a mineral fireproof layer and a second oxygen isolation layer from outside to inside. The mineral fireproof layer is filled between the first oxygen barrier layer and the second oxygen barrier layer, and the mineral fireproof layer can be decomposed under a heating condition to reduce the temperature of the cable core. The mineral fire-resistant layer does not need high-temperature vulcanization, damage to the cable core is avoided, the service life and long-term reliability of the medium-voltage fire-resistant cable are improved, the first oxygen barrier layer and the second oxygen barrier layer have fire resistance, the mineral fire-resistant layer can be decomposed under the heating condition, the cooling effect is achieved, and the service life of the medium-voltage fire-resistant cable is prolonged. The fire-resistant performance of the medium-voltage fire-resistant cable is improved through the synergistic effect of fire insulation, heat insulation and cooling.

The utility model discloses a bending-resistant two-layer twisted marine symmetrical fireproof communication cable, which comprises an outer-layer cable core body formed by uniformly distributing eight twisted-pair cable cores at intervals in the circumferential direction through an EPDM (Ethylene-Propylene-Diene Monomer) isolation core frame, and the center part of the EPDM isolation core frame is provided with a center hole. Four twisted-pair wire cores and PP resin filling core strips are twisted and jointly wrap an inner longitudinal wrapping layer of a modified silicone rubber ceramic mica fire-resistant composite belt to form an inner-layer wire core body, and the inner-layer wire core body is sleeved with the center hole. And a nylon tape wrapping layer, a copper wire braided shielding layer, a low-smoke halogen-free polyolefin inner sheath layer, a modified silicone rubber ceramic mica fire-resistant composite tape outer longitudinal wrapping layer, a high-temperature glass fiber wire wrapping layer and a low-smoke halogen-free polyolefin outer sheath layer are sequentially wrapped outside the outer-layer wire core body. According to the cable, the 12 pairs of twisted wire cores are arranged in two layers through the isolation core frame, the cable core structure is round and neat, the bending resistance is better, the fire resistance and flame retardance are better, the safety and reliability of the cable are enhanced, and the durability is better.

A novel precision steel alloy curtain wall installation method is characterized by comprising the following steps of a, installation of stand columns and b, installation of cross beams (2). According to the novel precision steel alloy curtain wall installation method, precision steel has high strength and good fire resistance, and the fireproof capacity is better; the glass curtain wall has the advantages of being high in using safety, high in drawing resistance, high in structural strength, high in wind resistance, suitable for a coastal city glass curtain wall system, small in steel consumption per unit area, capable of effectively saving cost, convenient to construct and capable of shortening the construction period.

The invention relates to the technical field of fireproof coatings, and discloses an environment-friendly inorganic expandable fireproof coating and a preparation method thereof.The expandable fireproof coating is prepared from, by mass, 75-145 parts of a ternary aluminosilicate precursor, 60-120 parts of an alkali activator, 5-9 parts of a fiber reinforced material, 15-30 parts of inorganic flame-retardant filler, 8-23 parts of inorganic heat insulation filler and 3.62-11.22 parts of auxiliaries. According to the technical scheme, by utilizing the dual expansion effect of the silica fume and the expandable graphite and the dual foaming effect of the silica fume and the hydrogen peroxide in the alkaline coal gangue and fly ash geopolymer, the prepared fireproof coating has relatively strong porous heat insulation capability under the normal temperature condition; the coating can rapidly expand under a high-temperature condition to generate a porous and firm inorganic heat insulation layer with the thickness of several times or even dozens of times, and the coating is high in fire endurance, excellent in heat insulation performance and not prone to aging.

The invention discloses a magnesium aluminate spinel refractory material containing trace manganese and a preparation method thereof, and the magnesium aluminate spinel refractory material is prepared from the following components by weight: 84-88% of magnesia, 5-8% of magnesium aluminate spinel, 1.2-1.6% of bauxite, 1-1.4% of manganese dioxide powder, 0.3-0.8% of metal manganese powder, 0.6-1.5% of a binder, 0.4-1% of an additive, and 0.4-0.8% of a molding aid. The magnesite is at least one of sintered magnesite, light-burned magnesite and fused magnesite, the binding agent is formed by combining at least one of silica powder, clay, dextrin and water glass, and the stabilizing agent is added for mixing and stirring. According to the invention, functionality which can be directly used in high-temperature environments such as a firing zone and a transition zone of a rotary cement kiln and has ideal microstructure and performance is added, so that the magnesium aluminate spinel refractory material has the effects of efficiently constructing the magnesium aluminate spinel refractory material and improving the fire resistance; and the condition that the magnesium aluminate spinel refractory material is relatively unstable in a firing zone and a transition zone of the rotary cement kiln is prevented.

The invention relates to the technical field of fused alumina zirconia bricks, in particular to a fused alumina zirconia refractory brick and a preparation technology.The fused alumina zirconia refractory brick is prepared from, by weight, 55-65 parts of alumina powder, 25-35 parts of zircon sand, 1-5 parts of modified nanometer alumina powder, 2-6 parts of binder, 1-2 parts of chromic oxide, 1-3 parts of yttrium oxide and 1-4 parts of fluxing agent. Through in-situ growth of a layer of carbon nanotube core-shell structure on the surface of nano-alumina, the core-shell structure can prevent direct contact between nano-alumina particles, so that the possibility of nano-alumina agglomeration is reduced, and nano-alumina is uniformly distributed in the corundum amorphous refractory brick. A finer dispersed phase is formed in the brick body, so that the expansion of cracks is hindered, and the toughness and the strength of the brick body are improved.

The invention relates to the technical field of new materials, and discloses an amino-terminated phosphorus-containing starch modified polyethylene flame-retardant composite material which is prepared by using polyethylene grafted phosphorus-containing starch as a modifier, carrying out blending modification on high-density polyethylene and using a polyethylene molecular chain introduced by a phosphorus-containing starch side chain as a compatilizer. The polyethylene grafted phosphorus-containing starch and the high-density polyethylene have good interfacial compatibility, the influence on the mechanical tensile strength and other mechanical properties of the high-density polyethylene is avoided, meanwhile, the starch is used as an expansion carbon source, and the side chain grafted phosphaphenanthrene derivative is used as a phosphorus-containing flame retardant, so that the phosphorus-containing flame-retardant polyethylene is prepared. The high-density polyethylene prepared by the preparation method has the advantages that the high-density polyethylene is used as a raw material, phosphoric acid compounds and phosphorus-oxygen free radicals are generated by thermal decomposition during combustion, and the phosphoric acid compounds are high in water absorption, so that the starch can be dehydrated and carbonized, a continuous and stable carbon barrier layer is formed in the high-density polyethylene, and smoke escape can be inhibited, molten drops can be prevented, and oxygen and heat insulation effects can be achieved.

The utility model discloses a mineral insulated flame-retardant fire-resistant cable, which comprises an outer protective sleeve, an annular scale is arranged on the outer surface of the outer protective sleeve, a mineral layer is arranged on one side of the inner part of the outer protective sleeve, an insulating protective layer is attached to the surface of one side of the mineral layer, an insulating layer is attached to one side of the insulating protective layer, and a flame-retardant layer is attached to the other side of the insulating layer. An insulating ring is arranged in the insulating layer, and an inner protective sleeve is arranged in the insulating ring; according to the mineral insulated flame-retardant fire-resistant cable, through the arrangement of the inner protective sleeve, the flame-retardant protective layer, the fire-resistant layer, the copper wires and the copper wires, when a power supply carried by the cable encounters fire and burns, the fire-resistant layer itself protects the internal copper wires and the copper wires from being in direct contact with external flames; the flame-retardant protective layer formed by the flame retardant made of magnesium hydroxide is brushed on the outer portion of the flame-retardant layer, and therefore the flame-retardant and fire-resistant characteristics of the original high-temperature-resistant flame-retardant layer are enhanced.