56results about How to "Improved thermal shock stability" patented technology

The invention discloses a low-carbon magnesia-carbon refractory material for clean steel smelting and a preparation method thereof, and relates to the technical field of magnesia-carbon refractory materials. The low-carbon magnesia-carbon refractory material comprises the following components: 40-50 wt% of fused magnesite with the particle size of 3-5 mm, 20-30 wt% of fused magnesite with the particle size of 1-3 mm, 10-20 wt% of fused magnesite with the particle size of less than or equal to 74 [mu] m, 8-12 wt% of silicon powder, 1-3 wt% of alumina powder and 3-5 wt% of crystalline flake graphite. 2-4 wt% of a composite additive and 4-6 wt% of phenolic resin are added; the composite additive comprises andalusite and mullite. The material has excellent mechanical properties, thermal shock resistance, oxidation resistance and erosion resistance; the preparation method has the characteristics of low cost and simple process, and the prepared low-carbon magnesia carbon refractory material has excellent oxidation resistance, thermal shock resistance and slag resistance by exerting the phase volume expansion effect and intergranular phase enhancement effect of the multiphase ceramic; the used graphite is low in content, graphite consumption and molten steel recarburization risk can be reduced, and the method is suitable for smelting clean steel.

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 novel tap hole structure comprises a furnace shell, an iron notch frame is installed on the side face of the furnace shell and located at the position of a blast furnace iron notch, and a plurality of prefabricated parts extending towards the interior of the furnace shell are arranged in the center of the interior of the iron notch frame. The multiple prefabricated parts are connected end to end, stemming channels penetrating through the iron notch frame are formed in the prefabricated parts, and first protruding parts which protrude outwards and are evenly arranged are arranged outside the prefabricated parts; the mud sleeve structure is reasonable in design structure and convenient to use, the mud sleeve structure formed by the prefabricated part is adopted to replace an existing mud sleeve structure formed by laying refractory bricks and pouring refractory materials in an iron notch area, the service life of the iron notch area can be prolonged on the premise that the thermal shock stability and the structural stability of the iron notch area are improved, and the service life of the iron notch area is prolonged. And the maintenance cost rise caused by frequent damage is avoided, and the normal working requirement of the blast furnace is met.

The invention belongs to the technical field of refractory materials, and discloses an aluminothermic reaction sintered alumina hollow sphere heat-insulating refractory material and a preparation method thereof. The aluminothermic reaction sintered aluminum oxide hollow sphere heat-insulating refractory material comprises the following raw materials in percentage by mass: 20-30% of aluminum oxide hollow spheres with the particle size of 3-5mm, 10-20% of aluminum oxide hollow spheres with the particle size of 1-3mm, 5-15% of aluminum oxide hollow spheres with the particle size of 0.1-1mm, 2-10% of light-burned magnesia, 20-30% of activated aluminum oxide powder, 15-25% of magnesium peroxide powder and 4-7% of metal aluminum powder, a binding agent accounting for 2-4% of the total mass of the raw materials is added. According to the refractory material, aluminum and magnesium peroxide are subjected to aluminothermic reaction and self-reaction sintering, a continuous spinel structure is formed on the surfaces of the matrix and the aluminum oxide hollow spheres, high strength is achieved through sintering at low temperature, and low thermal conductivity and high thermal shock stability are both considered.

The invention belongs to the field of refractory materials, and particularly relates to a low-chromium magnesite-chrome brick with high high-temperature flexural strength and a preparation method thereof.The low-chromium magnesite-chrome brick is prepared from raw materials including fused magnesite particles, fused magnesite fine powder, high-purity magnesite particles, chromium concentrate particles, chromium concentrate fine powder, high-purity magnesite fine powder and nano yttrium oxide, and a binding agent and lime milk are additionally added; the preparation method comprises the steps of pretreatment, wet grinding, forming and drying, coating and sintering. The process is simple, the product with good performance can be prepared, the chromium content in the product is reduced, the product is more environmentally friendly while the original advantages are kept, the high-temperature breaking strength, the high-temperature refractoriness under load and the thermal shock stability of the product are improved, and the breaking strength of the product at the high temperature of 1850 DEG C reaches 5.5-6.5 MPa.

The invention discloses a method for producing sintered brown aluminum oxide, which comprises the following steps of: crushing bauxite raw ore into particles, mixing the particles with sodium carboxymethyl cellulose and boric acid which are used as binding agents, aluminum oxide and water, grinding into fine particles, treating materials, namely cleaning soil adhered in the transportation process of bauxite, crushing and grinding for later use, crushing and grinding a carbon material for later use, and drying to obtain the sintered brown aluminum oxide. And removing rust outside the scrap iron, crushing and grinding for later use. The sintered brown aluminum oxide is produced by taking high-alumina bauxite raw ore which is loose in structure and cannot be directly sintered and industrial aluminum oxide or calcined aluminum oxide powder as raw materials.

The present invention discloses an integrated high-performance lining brick for a converter and a preparation method thereof, which belongs to the technical field of refractory materials for steel smelting converters, and comprises a brick body, wherein the brick body comprises a permanent layer of magnesium bricks and a working layer of magnesium carbon bricks, wherein the permanent layer of magnesium bricks and the working layer of magnesium carbon bricks are connected by a slot structure. The preparation method comprises the following steps: weighing each raw material; mixing and secondary molding operation; drying the integrated lining brick blank of the working layer of magnesium carbon bricks and the permanent layer of magnesium bricks to obtain an integrated high-performance lining brick for the converter. The integrated high-performance lining brick of the present invention can simplify the masonry process, greatly shorten the masonry time, complete the masonry task within the specified time, meet the requirements of the steel plant, and improve the integrity of the refractory material of the converter lining. The present invention has a simple production process, no high-temperature firing process, gets rid of the dependence on high-temperature tunnel kilns, etc., reduces manufacturing costs, saves resources, responds to the national call for energy conservation and emission reduction, and is beneficial to environmental protection.

The present invention relates to a yttrium oxide-based composite ceramic crucible for niobium-based alloy smelting and a preparation method thereof. The technical scheme is: yttrium oxide powder and titanium carbide powder are blended, ball-milled, and dried to obtain a composite powder; cold isostatic pressing is then performed to obtain a crucible blank; vacuum induction sintering is performed on the crucible blank to obtain a crucible base; the crucible base is dried, placed in hyperbranched polycarbosilane, maintained under vacuum and high pressure conditions, solidified, and high-temperature cracked at 1200-1400°C in an argon atmosphere; the pretreated crucible base obtained by high-temperature cracking is embedded in a silicon powder-calcium chloride composite powder, and sintered in a vacuum induction sintering furnace at a vacuum degree of 10 ‑3 ~10 ‑2 MPa and 1700-1900℃, the yttria-based composite ceramic crucible for niobium-based alloy smelting is obtained. The product not only has excellent fracture toughness, good thermal shock stability and excellent resistance to alloy melt erosion, but also has a long service life and high alloy melt cleanliness.

The method comprises the following steps that S1, dry materials and a binding agent are provided, and the dry materials comprise 19 wt%-24 wt% of intaglio corundum with the particle size being 3-5 mm, 22 wt%-35 wt% of intaglio corundum with the particle size being 1-3 mm, 12 wt%-19 wt% of white corundum with the particle size being 0-1 mm, 18 wt%-24 wt% of white corundum fine powder with the particle size being smaller than 200 meshes and 2 wt%-4 wt% of composite metal powder; s2, the dry material and a binding agent are mixed and ground, and a mixed and ground material is obtained; and S3, molding and drying the mixed and ground material to obtain the fire-resistant heat-insulating brick. The refractory brick produced by adopting the inked corundum and the white corundum as main raw materials, adding the composite metal powder and adding the additional binding agent has the advantages of high strength, good thermal shock resistance, good permeability resistance, good erosion resistance and long service life, and can be widely applied to rotary kilns, cement kilns and other parts.

The invention particularly relates to a solid heat storage material and a preparation method thereof. According to the technical scheme, the preparation method comprises the following steps: mixing magnesite tailing fine powder, alumina tailing fine powder, quartz sand fine powder, used magnesia carbon brick fine powder and barium sulfate fine powder to obtain premixed powder; mixing the magnesite tailing particles with the particle size of 5-3mm, the alumina tailing particles with the particle size of 3-1mm, the quartz sand particles with the particle size of 3-1mm and the magnesite tailing particles with the particle size of less than or equal to 1mm to obtain a granular material; mixing the granules with the premixed powder to obtain a mixture; and adding a polyvinyl alcohol solution, uniformly mixing, carrying out compression molding, drying, and carrying out heat treatment at 1300-1500 DEG C for 5-8 hours to obtain the solid heat storage material. The prepared solid heat storage material is high in heat conductivity, large in heat storage capacity, high in thermal shock resistance and large in compression strength.

The present application relates to the technical field of castables, and specifically discloses a high-performance hawk beak castable and a preparation method thereof. A high-performance hawk beak castable, using a first aggregate and fused white corundum as aggregates, composite coated graphite powder, silicon nitride, α-alumina micropowder, silicon dioxide micropowder and barium sulfate as powders, calcium aluminate cement as a binder, sodium hexametaphosphate and sodium tripolyphosphate as composite dispersants, tri(2-hydroxypropionic acid) aluminum salt and an active agent as adjuvants, and is cast, heat-insulated, and fired in two stages. The high-performance hawk beak castable prepared in this application has the characteristics of high flexural strength and compressive strength, small permanent linear change rate, expansion resistance, good thermal shock stability, good burst resistance, and metal corrosion resistance.

The invention provides a method for preparing a ceramsite fracturing propping agent with a SiO2-Al2O3 mullite phase at a low temperature and a product. The method comprises the following steps: putting a mixture of SiO2, Al2O3 and an instantaneous sintering aid into a low-temperature sintering device; a pressure relief opening of the pressure shaft is in a closed state, the pressure shaft is used for conducting first pressurization treatment on the sintering chamber, the air pressure in the sintering chamber is controlled to be higher than the air pressure outside the sintering chamber, and a first pressurization treatment product is obtained; the pressure relief opening is in an open state, the air pressure inside the sintering chamber and the air pressure outside the sintering chamber are adjusted to be kept consistent, second pressurization treatment is conducted, and the mullite phase fracturing propping agent which is excellent in mechanical property, low in breakage rate, stable in physical and chemical property and resistant to chemical corrosion is obtained. The preparation method has the advantages of simplicity in synthesis, easiness in implementation, low sintering temperature and energy conservation, is beneficial to popularization in the field of industrial fracturing of petroleum and natural gas, and has a wide application prospect.

The invention discloses a composite fireproof heat insulation pad for a battery pack and a preparation method thereof, and belongs to the technical field of battery safety. The heat insulation pad is of a double-layer composite structure, the inner layer is a high-silicon-dioxide glass fiber needled felt heat insulation core layer, and the outer layer is a ceramic silica gel glass fiber cloth fireproof coating layer. The two layers are sewn into a whole through high-temperature-resistant sewing threads, and a back adhesive layer is arranged on one side of the two layers. The product provided by the invention has excellent fire resistance (can tolerate flame at 1000 DEG C for 30 minutes), excellent heat insulation, excellent flexibility and thermal shock resistance, and is convenient to install. The preparation process is simple, can be completed through cutting, wrapping and sewing and gum application, and is suitable for large-scale production. The product can effectively delay or prevent heat spreading in the battery pack, and the battery safety level of the new energy automobile is remarkably improved.

The invention discloses high-purity heat-resistant quartz ceramic and a preparation method and application thereof, and belongs to the technical field of inorganic non-metallic materials, the high-purity heat-resistant quartz ceramic comprises the following raw materials by mass fraction: 50-80% of a fused high-purity quartz raw material, 10-50% of fused high-purity quartz fine powder, 0.1-1% of a composite mineralizer, and 0.1-5% of a binder; the content of CaO in the high-purity heat-resistant quartz ceramic is less than or equal to 0.1%. The aspects of raw material deep processing, additives, the preparation process and the like are strictly controlled, the addition of calcium-containing substances is avoided, the eutectic point phase is fundamentally reduced, the alkali corrosion resistance and the high-temperature strength are further improved, and the finally obtained quartz ceramic has the advantages of high refractoriness under load, excellent thermal shock resistance and corrosion resistance, and the service life of the quartz ceramic is prolonged. The method is suitable for severe environments such as oxy-fuel combustion glass kilns.

The present invention relates to the technical field of aluminum alloy die-casting, and more particularly to a silicon nitride-bonded silicon carbide ceramic feed tube for aluminum alloy die-casting and a preparation method thereof. The silicon nitride-bonded silicon carbide ceramic feed tube for aluminum alloy die-casting has an annular structure with an open ring wall. The tube is made of silicon nitride-bonded silicon carbide ceramic and is prepared from 45 to 85 parts by weight of a mixed powder, 3 to 10 parts by weight of a reinforcing agent, and 15 to 40 parts by weight of a conditioning agent solution; the mixed powder comprises elemental silicon powder, silicon nitride powder, and silicon carbide powder. Due to the in-situ SiTi2N4 reinforcement phase, the feed tube exhibits excellent wear resistance, thermal shock resistance, and low thermal conductivity, making it adaptable to the service environment of ultra-high pressure casting machines and significantly improving the production efficiency of high-pressure casting machines. The reduced thermal conductivity of the ceramic material reduces heat loss, enhances the temperature control capability of the aluminum alloy fluid within the feed tube, and ensures the product's high performance and stability.

The present application relates to the technical field of lithium battery production, and particularly relates to a high-energy-efficiency carbon kiln and a preparation method thereof. The high-energy-efficiency carbon kiln is prepared from carbon coarse aggregate, carbon fine aggregate, carbon fine powder, a conditioning additive and a water-soluble binding agent through high-temperature carbonization. The microstructure controllable crucible matrix is prepared by using different particle gradations, the carbon kiln blank strength is improved by using modified resin and industrial syrup as the composite binding agent, the damage rate is reduced, a three-dimensional network structure is formed in the interior of the kiln during the baking process to coat the aggregate, fill the pores and enhance the corrosion resistance of the carbon kiln. The modified resin has good affinity with the conditioning agent on the carbon chain, and the Fe2AlB2 fiber with excellent damage tolerance is generated in-situ while the zirconium boride, aluminum powder, iron powder and boron gangue are enriched. The coupling effect of the modified resin skeleton and the Fe2AlB2 whisker further improves the toughness and thermal shock stability of the product, and increases the service life.

The invention relates to the technical field of saggers, in particular to a sagger for solid-phase sintering of a high-nickel NCA ternary lithium battery positive electrode and a preparation method of the sagger. The preparation method comprises the following steps: S1, mixing and grinding bauxite fine powder, active Al2O3 micro powder, pyrophyllite fine powder, Si powder and boric acid to obtain mixed powder; s2, adding silica sol and stirring to obtain slurry; s3, performing spray granulation on the slurry to obtain a microsphere material; s4, performing high-temperature heat preservation on the microsphere material in a nitrogen atmosphere, cooling and sieving to obtain a sintered microsphere material; s5, magnesium aluminate spinel particles, mullite fine powder, the sintered microsphere material, talc fine powder and cerium oxide fine powder are mixed and subjected to ball milling, and a mixture is obtained; s6, adding paper pulp waste liquid, mixing, sealing and ageing to obtain an aged material; and S7, after compression molding and drying, high-temperature heat preservation is conducted, and the saggar is obtained after cooling. And the prepared sagger is good in integrity, high in yield, excellent in sintering performance, high in thermal shock resistance and high in resistance to corrosion and permeability of a high-nickel NCA ternary lithium battery positive electrode material.

The invention belongs to the technical field of steel bridge deck pavement, and particularly relates to a semi-rigid and semi-flexible light steel bridge deck pavement structure and a pavement method of the semi-rigid and semi-flexible light steel bridge deck pavement structure. From the steel plate to top, an anti-rust layer, a waterproof bonding layer, a 3-4.5 cm light flexible pouring type asphalt concrete lower surface layer, a high-viscosity light epoxy resin bonding layer and a 2-3.5 cm light modified epoxy asphalt concrete upper surface layer are sequentially arranged. The lightweight aggregate and the lightweight filler are doped into the concrete layer and the adhesive layer, so that the structural layer is lightweight, and the stress condition of the steel plate is improved while the dead load of the material is reduced; effective bonding of the upper layer structure and the steel plate is ensured; and finally, based on the combination of the rigid lower surface layer and the flexible upper surface layer with the steel panel, a semi-rigid and semi-flexible pavement structure is formed, so that the strength, the rigidity, the high-temperature stability, the crack resistance, the skid resistance and the like of the semi-rigid and semi-flexible pavement structure are improved, and a more excellent pavement structure is provided for the steel bridge deck.

This invention relates to the field of refractory material production technology, specifically to the preparation of nitride-bonded corundum-silicon carbide composite materials. The mixture comprises 50-80 wt% silicon carbide particles, 5-20 wt% corundum particles, 5-20 wt% silicon powder, 2-12 wt% silica micropowder, 2-5 wt% additives, and 1-2 wt% water or alcohol. The corundum particles consist of two different particle sizes: 0-1 mm and 1-3 mm, with contents of 3-8 wt% and 5-15 wt%, respectively. The silicon carbide particles consist of three different particle sizes: 1.5-2.5 mm, 0.5-1.5 mm, and 0-0.5 mm, with contents of 10-15 wt%, 25-35 wt%, and 10-15 wt%, respectively. A fine mixed powder is obtained by mixing the silica micropowder, silicon powder, and silica powder. The mixture is then loaded into a mold and formed by friction vibration. After drying, it undergoes nitriding treatment. The silica powder and silica micropowder in the blank undergo a co-nitriding reaction to generate silicon nitride and silicon oxynitride. The mixture is then cooled to room temperature in a furnace to obtain a nitride-bonded corundum-silicon carbide composite material. The process is simple and the production cost is low. Its products have excellent high temperature resistance and thermal shock resistance, which are significantly better than those of traditional silicon nitride-bonded silicon carbide materials.

The invention discloses a production process for blue glass, and relates to the technical field of blue glass production. The process comprises the following steps: S1, raw material pretreatment: respectively grinding and drying a basic glass raw material, a coloring agent and a functional additive, and then mixing in sequence; s2, melting the mixture in a primary melting furnace in a reducing atmosphere, and adding a reducing agent; s3, transferring the primarily molten glass liquid into a main furnace, and stirring and clarifying in a nitrogen-oxygen mixed protective gas environment; s4, cooling the clarified glass liquid, and continuously stirring and homogenizing; according to the preparation method, the basic raw materials, the coloring agent and the functional additive are accurately proportioned, and control steps of staged mixing, reducing atmosphere melting, multi-stage clarification and homogenization, float forming and the like are combined, so that synergistic improvement of high optical purity and excellent mechanical performance is realized. In the process, the purity, the granularity, the charging sequence and the thermal regulation of the raw materials are strictly controlled, so that the component uniformity and the product consistency are guaranteed.

The invention relates to a magnesium-carbon composite material and a preparation method thereof. According to the technical scheme, the preparation method comprises the following steps: taking 60-75wt% of magnesium-aluminum-calcium particles, 13-25wt% of fused magnesia fine powder and 12-20wt% of aluminum-calcium-carbon particles as raw materials, adding aluminate which accounts for 3-6wt% of the raw materials, stirring, and carrying out compression molding; and drying at 110-200 DEG C for 8-24 hours, and cooling to obtain the magnesium-carbon composite material. The low-grade magnesia fine powder and the low-grade graphite fine powder are used as main raw materials to prepare the magnesium-carbon composite material for high-temperature smelting, the preparation method has the characteristics of simple process and low cost, and the prepared magnesium-carbon composite material is good in thermal shock stability and strong in erosion resistance, and can be used as a furnace lining material of a container for high-temperature smelting.

The present invention discloses a composite spinel-corundum refractory material for a crematorium and a preparation method thereof, and belongs to the technical field of refractory materials. The composite spinel-corundum refractory material for a crematorium of the present invention comprises the following raw materials, in terms of mass percentage: 80-95% of aluminum oxide and 5-20% of ferromanganese alloy. The composite spinel-corundum refractory material for a crematorium prepared by the present invention has the excellent properties of both manganese-aluminum spinel and iron-aluminum spinel, and can overcome the problems of unsatisfactory performance and short life of clay and high-aluminum refractory materials for crematoriums in the prior art, and at the same time can overcome the problems of Fe / Mn ion valence change, high temperature required for solid phase sintering, long reaction time, etc., when the iron oxide and manganese oxide are used as the iron source / manganese source to synthesize iron-aluminum spinel and manganese-aluminum spinel materials in the prior art.

The invention relates to the technical field of ceramic metallization, in particular to a metallization process of a ceramic material, which comprises the following steps: reacting chitosan with glycidyl methacrylate to obtain a water-soluble vinyl chitosan derivative; the preparation method comprises the following steps: adding a vinyl chitosan derivative, soluble metal salt and a water-based photoinitiator into water to prepare impregnation liquid; impregnating the ceramic material in the impregnation liquid, and curing under ultraviolet light; maintaining ultraviolet light for heat treatment; according to the metallization technology, the tensile strength and the thermal shock resistance of the ceramic metallization layer are remarkably improved, operation is easy, generated waste liquid is little, and the metallization technology is more environmentally friendly.

The invention discloses a slag-resistant wear-resistant castable and a preparation method thereof, and the slag-resistant wear-resistant castable is prepared by mixing and stirring the following components: 50-65 parts of corundum aggregate, 8-12 parts of andalusite, 5-6 parts of silicon carbide, 6-8 parts of modified calcium oxide, 1-8 parts of zirconium oxide, 2-3 parts of aluminum oxide, 4-6 parts of calcium aluminate cement and 1-2 parts of a water reducing agent. According to the invention, the use amount of calcium aluminate cement is reduced, the problem of strength reduction caused by later hydration of the castable is avoided, and zirconium oxide is cooperatively used, so that the overall erosion resistance, impact resistance and wear resistance of the castable are improved.

The application discloses a nitrogen-oxygen composite rare earth ceramic riser base and a preparation process thereof, and relates to the technical field of coke oven riser. The riser base comprises a base and a riser cylinder, the riser cylinder is fixedly arranged on the upper portion of the base, and the riser cylinder and the base are both circular in cross section and concentrically arranged. The base comprises the following components in parts by weight: 40-50 parts by weight of silicon carbide powder, 12-13 parts by weight of industrial silicon powder, 8-10 parts by weight of silicon micro powder, 2-3 parts by weight of additives and 33-36 parts by weight of a binding agent. A decoking assembly for cleaning graphite and tar attached to the inner wall of the base is arranged in the base. The preparation process comprises the following steps: S1, mixing; S2, forming; S3, sintering; and S4, installation. The application selects high-purity silicon carbide as the main raw material, guarantees excellent thermal shock stability of the product, adds rare earth oxides to improve the toughness of the riser base material, and further improves the wear resistance and oxidation resistance of the riser base.

The present application relates to the technical field of polyurethane, specifically a polyurethane composite material for high-speed rail and its preparation method and application, including raw materials: 8-12 parts of flame-retardant polyether polyol, 6-8 parts of isocyanate, 1-2 parts of modified nano zinc oxide, 0.02-0.04 parts of catalyst, 5-10 parts of mixed fiber, 4,4'-methylenebis(2-chloroaniline) 4-6 parts, N,N-methylenebisacrylamide 2-3 parts; mixed fiber includes aramid fiber and basalt fiber; the preparation method of flame-retardant polyether polyol includes: taking isophorone diisocyanate, adding dibutyltin dilaurate, heating, dropping polyethylene glycol monomethyl ether, vacuum distillation, and obtaining an intermediate product; taking bisphenol A type epoxy resin and heating, under a protective gas atmosphere, dropping phenylphosphonic acid, adding benzyl triethylamine chloride and the intermediate product, vacuum distillation, and obtaining flame-retardant polyether polyol. The polyurethane composite material prepared by matching specific raw materials has good corrosion resistance and flame retardancy while improving the mechanical properties of polymer materials.

The utility model relates to the technical field of nozzle protection, in particular to a composite slag line type submersed nozzle with a side hole protection device, which comprises a nozzle body. The nozzle body comprises a middle body material, a wear-resistant material fixed to the upper end of the middle body material, a lining material fixed to the inner side face of the middle body material, a slag line material fixed to the lower end of the interior of the middle body material, a composite slag line fixed to the inner side face of the slag line material and a side hole material fixed to the bottom of the slag line material. According to the composite slag line type submersed nozzle with the side hole protection device, the structure of the inclined side hole is improved, and the lining material is installed on the inner bottom face of the inclined side hole, so that the thermal shock stability of the side hole of a product is improved, bottom falling and cracking of the side hole of the product are avoided, and the composite slag line type submersed nozzle is more stable in use and higher in field adaptability; by adopting the detachable structural design, the lining material is convenient to mount and dismount, and the later use cost is reduced.

The invention discloses a blast furnace tapping main channel castable based on microporous mullite-silicon carbide enhancement, belongs to the technical field of refractory materials, and aims to solve the technical problem that the fluidity of the castable and the high temperature resistance of a cast product need to be improved in the prior art. The refractory material comprises the following components in parts by weight: 50-54 parts of fused brown corundum, 3-5 parts of fused brown corundum powder, 4-6 parts of white corundum powder, 16-18 parts of silicon carbide, 6-8 parts of alumina micro-powder, 0.2-0.6 part of boron carbide, 1-3 parts of modified graphite, 2-3 parts of silica micro-powder, 1-3 parts of monatomic silicon powder, 2-4 parts of modified silica sol and 0.2-0.5 part of a water reducing agent. According to the invention, the boron carbide, the modified silica sol and the modified graphite are added into the castable and cooperate with each other, so that the fluidity of the castable is improved, and the high temperature resistance of a cast product is improved.

The invention discloses a wet-type plastic material for a copper smelting system and a preparation method thereof, and the wet-type plastic material for the copper smelting system comprises the following raw materials in parts by weight: 60-70 parts of a particle mixture, 35-45 parts of a fine powder mixture, 10-18 parts of a composite plasticizing solvent, 5-12 parts of a binding agent and 0.5-3 parts of an anti-explosion agent. The preparation method of the wet-type plastic refractory for the copper smelting system comprises the following steps: firstly, preparing the particle mixture, the fine powder mixture, the composite plasticizing solvent and the binding agent, then uniformly stirring the raw material mixtures, and mixing and grinding the raw material mixtures into cement. The plastic material has the advantages of high strength, wear resistance, thermal shock resistance and good corrosion resistance, the physical properties of the plastic material are effectively improved, cracks are not easy to generate, and the service life is effectively prolonged; and construction is convenient, long-time storage can be achieved, the maintenance frequency and loss of the copper melting furnace lining can be reduced, and production economic benefits are improved.

The invention belongs to the technical field of refractory materials, and particularly relates to an aluminum-zirconium silicon carbide brick for a cyclone separator of a garbage incinerator and a preparation process of the aluminum-zirconium silicon carbide brick. The aluminum-zirconium silicon carbide brick comprises 63-83% of silicon carbide, 5-10% of alumina micro powder, 2-7% of zirconium silicon micro powder, 5-10% of zirconium oxide and 5-10% of an inhibitor. The coating further comprises 3-8% of a binding agent and 50-80% of brine for dipping. When the aluminum-zirconium silicon carbide brick for the cyclone separator of the garbage incinerator is produced, specific raw materials are selected, reasonable matching is adopted, an inhibitor and a salt-resistant binder are added, and after high-pressure forming and high-temperature sintering, the brick is soaked in special brine in a vacuum reaction kettle and then baked at medium temperature, so that the material has good resistance to high salt, and the service life of the brick is prolonged. The erosion resistance of the material is realized.