290 results about "Fluorite" patented technology

The invention provides a method for synchronously recovering iron and rare earth from iron separation tailings, which comprises the following steps of: roasting the pretreated iron separation tailings in a graphite crucible to obtain a roasted product; the roasted product is crushed and screened, oversize products and undersize products are obtained, and the oversize products are reduced iron products; the screen underflow and an acid solution are mixed for leaching, and leaching liquid containing rare earth elements and acid leaching residues are obtained; and adding a precipitant into the leachate to obtain a precipitate containing rare earth elements, and recovering fluorite concentrate from the acid leaching residues. According to the method, the traditional disjunction mode of pre-enrichment and then smelting is broken through, a roasting-acid leaching integrated process with deep beneficiation and smelting coupling is provided, the complex pre-enrichment link is abandoned, efficient and synchronous recovery of iron and rare earth is achieved, and the method has the advantages of being short in process, low in energy consumption, few in flotation reagent, high in rare earth recovery rate, high in resource comprehensive utilization rate and the like.

The present application aims at the problems of excessive consumption of traditional cement limestone resources, excessive energy consumption and high carbon emission, and provides a carbonated hardened low-calcium cement and a preparation and hardening method thereof, which is a hardening method for curing low-calcium cement by CO2 carbonation. The mass percentage composition of cement raw material components is: limestone: 60-70%, sandstone or clay or silica ash: 15-25%, phosphogypsum, fluorogypsum or desulfurization gypsum: 5-25%, component A: 0.5-2%. Component A is composed of the following raw material components in mass percentage: fluorite 0-50%, barium slag: 0-50%, lithium slag 0-50%, wood ash 0-50%, industrial sodium carbonate 0-30%. The composition design of carbonated hardened cement clinker minerals is C2S: 10-90%, C5S2$: 10-90%, C$: 0-5%, C4A3$: 0-10%, etc. In the present application, the limestone required for the cement clinker is lower than that of ordinary Portland cement clinker, the calcination temperature is reduced by 200-350 DEG C than that of ordinary Portland cement clinker, and the energy consumption and carbon emission are significantly lower than those of Portland cement; the low-calcium cement is hardened by CO2 carbonation curing, which can make the cement obtain excellent mechanical properties within 2 hours.

The utility model discloses a fluorite ore crushing and sorting device which structurally comprises a sorting box, a first crushing roller and a second crushing roller, fluorite ore is poured into a crushing cavity at the upper end in the sorting box through a feeding port, and the fluorite ore is crushed for the first time under the condition that a motor drives the first crushing roller to rotate; the fluorite ore is crushed, falls onto the first filter plate after being crushed, flows downwards under shaking, and is screened in the flowing process, so that the qualified fluorite ore falls onto the second filter plate, is screened again under the action of the second filter plate, and falls downwards from the first guide plate; the broken fluorite ores are divided into two different sizes and qualities, and downwards enter a first storage box and a second storage box through a first discharging pipe and a second discharging pipe to be collected, so that the sorting effect and quality are better, and the situation that the single sorting efficiency and quality are low is avoided; and the fluorite ore on the first filter plate enters the second crushing cavity for repeated crushing work, so that crushing and sorting are more complete.

The invention discloses a rolling process method for Q355C, D and E grade steel plates with the thickness of 100-150 mm. The rolling process method comprises the following steps that raw materials are prepared and smelted; the molten steel is transferred into an LF furnace for refining, lime and fluorite slagging materials are added, the refined molten steel is transferred into a VD furnace for vacuum degassing treatment, and the vacuum degree is smaller than or equal to 67 Pa; continuous casting: carrying out continuous casting or die casting on the molten steel subjected to vacuum degassing for pouring, and controlling the pouring temperature to be 1550-1560 DEG C; heating: feeding the casting blank into a heat accumulating type heating furnace for heating, and controlling the heating temperature to be 1200-1240 DEG C; the heated casting blank is subjected to normalizing rolling, and in the rolling process, high-pressure water is used for reducing the surface temperature of the steel blank; cooling, wherein the rolled steel plate is subjected to accelerated cooling, and the water entering temperature is 890-910 DEG C; and stack cooling is conducted, specifically, the rolled steel plate is subjected to stack cooling, and the stack cooling temperature is higher than 420 DEG C. The Z-direction performance of the developed steel plate reaches Z35 through reasonable component design and the normalizing rolling and NCP technology, and the steel plate has good obdurability matching and welding performance.

The invention relates to the technical field of stainless steel casting preparation, in particular to an anti-aging stainless steel material and a casting process thereof. Wherein the chemical components comprise, by weight, 0.01%-0.03% of C, 18%-22% of Cr, 8%-11% of Ni, 0.1%-0.8% of Mo, 0.5%-1.5% of Mn, 0.2%-1.0% of Si, 1.0%-3.6% of Cu, 0.2%-0.5% of Nb, 0.15%-0.25% of N and the balance Fe. The lime, the fluorite, the aluminum powder and the sodium silicate solution are precisely proportioned, a series of synergistic effects are achieved through a rigorous technological process, the physical and chemical properties of the smelting slag are optimized, and the high-alkalinity and high-fluidity smelting slag generated through the synergistic effect of the lime and the fluorite has the advantages that the smelting efficiency is improved; ideal thermodynamic and dynamic conditions are provided for desulfurization and dephosphorization reactions, harmful elements such as sulfur and phosphorus can be rapidly combined with CaO, stable compounds are generated and enter a slag phase to be removed, and the toughness and corrosion resistance of stainless steel are improved.

The invention discloses a method for preparing nano calcium carbonate by using fluorite leachate, and belongs to the technical field of hydrometallurgy. According to the method, metallurgical-grade fluorite is subjected to magnetic separation iron removal and hydrochloric acid solution leaching, high-purity fluorite and a calcium chloride solution are obtained, and meanwhile carbon dioxide gas is generated; removing impurities from the calcium chloride solution, reacting the calcium chloride solution with an ammonium carbonate solution to form a calcium carbonate emulsion, aging the calcium carbonate emulsion, filtering and separating to obtain nano calcium carbonate and filtrate; heating the filtrate to generate hydrogen chloride and ammonia gas, absorbing hydrogen chloride by water to form a hydrochloric acid solution, and recycling; ammonia gas and carbon dioxide are absorbed by water to generate an ammonium carbonate solution for recycling. According to the method, the metallurgical-grade fluorite is purified, meanwhile, the nano calcium carbonate product with the high additional value is prepared through the fluorite leaching solution, cyclic utilization of hydrochloric acid, ammonium carbonate and the like can be achieved, and the method has the advantages of being environmentally friendly, capable of saving energy, reducing consumption, simple, efficient and the like and is beneficial to large-scale application and popularization.

The invention discloses a method for producing anhydrous hydrofluoric acid from photovoltaic fluorine-containing waste materials. The waste materials are fluorine-containing solid press filter residues or filter cake biscuits obtained through solid-liquid separation after photovoltaic fluorine-containing waste liquid treatment. The method comprises the following steps: drying, crushing and screening the waste until the waste is matched with the fluorite powder in particle size, returning the oversize product to the crushing, closed-loop granulating and homogenizing; continuously metering and uniformly mixing the homogenized waste and fluorite powder according to a mass ratio of 20: 1 to obtain a mixed fluorine-containing raw material, and continuously feeding the mixed fluorine-containing raw material into a rotary reaction furnace; fuming sulfuric acid and concentrated sulfuric acid are mixed into mixed acid, the mixed acid is continuously added into a reaction furnace, the mixed acid reacts at the temperature of 300-350 DEG C to generate a fluorine-containing gas phase, and reaction heat is indirectly provided by circulation of high-temperature gas in a jacket of the reaction furnace; the crude product gas enters a degassing tower to remove SO2 and SiF4 after being subjected to dust removal, washing, cooling, condensation, rectification, deacidification and dehydration, and an anhydrous hydrofluoric acid product is obtained. According to the method, waste recycling is achieved, and fluorite consumption and waste disposal amount are reduced.

The invention discloses a treatment process and a treatment system for crystallization of photovoltaic wastewater calcium fluoride sludge, limestone particles and photovoltaic sludge are mixed according to a mass ratio of 3%-5% to obtain a homogeneous mixed material, the homogeneous mixed material is pre-dried and then fed into a rotary kiln, sintering is carried out at 1200-1500 DEG C for 1.5-3 hours, and the sintered material is cooled to room temperature. Calcium fluoride is attached to the surface of the silicate framework, sulfur trioxide and calcium oxide are released at the same time, after sintering is finished, the material is subjected to annealing treatment in a rotary kiln, calcium fluoride seed crystals accounting for 0.1%-1.0% of the total mass of the material are added, calcium fluoride crystals are induced to grow directionally and be repaired, and the calcium fluoride is obtained. According to the method, the purity of calcium fluoride is increased to 75%-85%, the sulfur content in the product can be controlled to be 0.1% or below, and the cold compressive strength of the pellets prepared from the product reaches 2.5 MPa or above.

The application discloses a kind of fluorite tailing material fatigue-resistant water-stable base and preparation method thereof.Belongs to the technical field of solid waste utilization.Preparation of the fluorite tailing material fatigue-resistant water-stable base aggregate ratio is as follows: gravel, river sand, fluorite tailing material and tap water quality ratio is as follows: 55-65 wt%, 30-35 wt%, 5-10 wt% and 40-45 wt% tap water.In the application, fluorite tailings are used as raw materials for building materials, which is a reasonable way of resource utilization, and is also an inevitable demand for promoting ecological protection and high-quality development in the Yellow River Basin.Compared with traditional natural materials, it can also reduce carbon emissions and production energy consumption.When applied to water-stable base, it improves its fatigue resistance, prolongs the service life of water-stable base and improves economic efficiency.

The invention discloses high-toughness impact-resistant environment-friendly ceramic and a preparation method thereof, and belongs to the technical field of ceramic. The environment-friendly ceramic is prepared from the following components in parts by weight: 25-35 parts of zirconium-containing polishing waste residues, 30-45 parts of high-alumina fly ash, 10-20 parts of coal gangue, 5-10 parts of waste basalt chopped fibers, 2-5 parts of fluorite tailings and 0.1-1.0 part of an organic carbon source coating agent, the preparation method comprises the following steps: firstly, pretreating basalt fibers by using an organic carbon source coating agent to form precursor fibers; mixing the precursor fiber with other powdery wastes, and molding; and finally, carrying out temperature-controlled sintering at a relatively low temperature of 1130-1170 DEG C, the ceramic prepared by the invention has excellent fracture toughness and impact resistance while consuming a large amount of industrial solid waste, is low in production energy consumption, and has remarkable economic and environmental benefits.

The application discloses a method and system for recycling dust removal ash of blast furnace manganese iron smelting, and first proposes a technical route for recycling carbon powder, fluorite, manganese fluoride, manganese sulfate, potassium bicarbonate, potassium sulfate, sodium chloride and other valuable resources by water washing of the dust removal ash of blast furnace manganese iron smelting. The water washing slag and washing wastewater of the dust removal ash of blast furnace manganese iron smelting are simultaneously treated in a cooperative manner, the process can be designed according to the characteristics of the washing wastewater and the water washing slag, the multistage recovery of the valuable resources is realized, new impurities are not introduced, and the added value of the recovered resources is improved. In addition, the whole process does not discharge wastewater and waste gas, has high economic value and meets the green and environment-friendly production requirements.

The application discloses a method for preparing niobium carbide from aluminum niobium slag by fire reduction recovery. The method comprises the following steps: taking aluminum niobium slag, graphite powder and fluorite according to the mass ratio of 100:6-12:3-8, mixing them uniformly to obtain a mixture; loading the mixture into an electric arc furnace preheated to 700-900 DEG C and into which a protective gas is introduced, heating to 1750-2050 DEG C and keeping constant temperature for 2-4 hours, and then discharging aluminum slag mixture and niobium carbide alloy ingot after layering; crushing the niobium carbide alloy ingot, adding it into an alkaline solution according to the solid-liquid ratio of 1g:8-12ml, heating to 80-100 DEG C and stirring for 2-4 hours, filtering and washing with water until pH=7-8 while hot after the reaction, and then performing acid washing and drying. The application has wide raw material adaptation range, high niobium recovery rate and product purity, and obvious cost advantage.

This invention proposes a method for preparing cement clinker based on fluorite, belonging to the field of cement production technology. Through steps such as fluorite raw material pretreatment and particle size classification, co-grinding of fluorite and raw meal, dynamic adjustment of fluorite admixture, clinker firing, and rapid cooling to obtain the finished product, fluorite is uniformly dispersed in the raw meal system, stably exerting its mineralization effect. This can reduce the liquidus appearance temperature by 50-80℃, reduce the clinker sintering temperature by 50-100℃, significantly promote the formation and development of core strength minerals such as C3S, shorten the clinker firing time, and improve the production efficiency of the kiln system.

The invention discloses a method for smelting titanium-containing austenitic stainless steel through a slagging process, and belongs to the technical field of stainless steel smelting. The method comprises two core procedures of AOD converter smelting and LF refining. In the AOD converter stage, the oxidation content of chromium is controlled to be smaller than or equal to 0.8%, the silicon content after reduction is larger than 1.2%, slagging-off operation is executed to enable the slag thickness to be smaller than or equal to 100 mm, and clean molten steel is provided for subsequent procedures. In the LF refining stage, the key point is that a specific slagging process is adopted, specifically, fluorite, lime and refining slag are sequentially added, the bottom blowing argon flow is controlled to be 200-300 L / min, and a bypass is forbidden to be used; and then an aluminum wire is fed to accurately control the aluminum content of the molten steel to be 0.035%-0.045%, finally titanium alloying is conducted at the temperature of 1570-1575 DEG C, and the titanium content is controlled to be 0.30%-0.32%. Through systematic control, the Ti content and the TiN inclusions of the molten steel are accurately controlled, the problems of flocculation at a continuous casting nozzle, 'fish formation 'of a crystallizer and surface defects of a plate blank are effectively solved, smooth casting is guaranteed, the product quality is improved, and the number of continuous casting furnaces is increased.

The utility model discloses a fluorite fine powder processing flotation device which comprises a flotation tank, a driving shaft is coaxially arranged in the flotation tank, and the driving shaft is connected with a power mechanism. A stirring and deslagging assembly with adjustable stirring strength is coaxially mounted at the bottom end of the driving shaft, a deslagging opening is formed in the peripheral side of the bottom of the flotation tank, and the stirring and deslagging assembly is used for stirring an ore pulp mixture in the flotation tank and discharging residues at the bottom of the flotation tank from the deslagging opening after flotation is finished; a foam outlet is formed in the side face of the top of the flotation tank, and a plurality of foam scraping plates are circumferentially distributed on the shaft body of the driving shaft corresponding to the foam outlet and used for discharging bubbles generated in the flotation tank through the foam outlet. The outer side of the flotation tank penetrates through the tank wall of the flotation tank and extends into the flotation tank, and a feeding pipe and an air inlet pipe are arranged on the outer side of the flotation tank and used for introducing fluorite materials and air into the stirring and deslagging assembly.

The present disclosure provides a ceramic material for a thermal barrier coating and a manufacturing method thereof. A chemical composition of the ceramic material is LaYbZrCeO7. The ceramic material is manufactured by doping LaO1.5, YbO1.5 and CeO2 into ZrO2. A mole ratio of LaO1.5, YbO1.5, CeO2 and ZrO2 is 1:1:1:1. The manufactured ceramic material is in a composite phase structure mainly including a pyrochlore phase and a fluorite phase. The ceramic material according to the present disclosure can effectively inhibit corrosion penetration of molten CMAS in a high temperature environment, which reduces or avoids ceramic cracking and peeling. This better maintains microstructural integrity of the ceramic surface, thereby extending service life of ceramics.

This invention discloses a neutral refractory material for medium-frequency induction furnace linings. The raw materials include: 78-83 parts by weight of quartz sand, 5-7 parts by weight of fire clay, 5-7 parts by weight of fluorite, 0.8-1.2 parts by weight of alumina, 1.2-1.8 parts by weight of silicon carbide, and 0.3-0.7 parts by weight of calcium oxide. The preparation method is also disclosed. The method of this invention is simple, with the main components being quartz sand, fire clay, and fluorite, with quartz sand comprising the largest proportion. In addition, some additives such as alumina, silicon carbide, and calcium oxide are added to improve the refractory properties and chemical reactivity of the furnace charge. This results in a material with certain slag resistance and a good service life, exhibiting good overall performance and suitable for melting various metals. The furnace lining mixture is non-toxic, harmless, environmentally friendly, and pollution-free.

The present application relates to autoclaved aerated concrete plate technical field, specifically to high toughness AAC plate with heavy metal solidification function and a preparation method thereof. The present application makes full use of the silicon dioxide in fluorite tailings, copper tailings and spodumene tailings as siliceous material, uses cement, quicklime and other alkaline materials as calcareous material, adds appropriate amount of aluminum powder paste and other gas forming agents as pore forming agent, appropriate amount of coagulation regulator, appropriate amount of nano Y type molecular sieve and high efficiency toughening agent, and through steam curing (temperature < 200 DEG C), the autoclave is discharged, and a kind of high toughness AAC plate with heavy metal solidification function is prepared.

The application relates to a foamed ceramic capable of serving at 1000 DEG C and a preparation method thereof, and belongs to the technical field of foamed ceramics. The preparation method of the foamed ceramic capable of serving at 1000 DEG C comprises the following steps: (1) mixing barium titanate, manganese oxide, iron oxide and fluorite to obtain a mixture; (2) ball milling the mixture into mixed powder I; (3) ball milling solid waste raw materials into mixed powder II; (4) mixing silicon nitride with the mixed powder I, the mixed powder II and water, stirring uniformly to prepare mixed powder III; (5) pressing the mixed powder III into a green body; and (6) sintering the green body to obtain the foamed ceramic. The physical and mechanical properties of the foamed ceramic prepared by the application are almost consistent with the initial state at room temperature after serving at 1000 DEG C for 100 hours, which indicates that the foamed ceramic has the characteristics of high high-temperature strength and stable comprehensive performance, and meets the application requirements of long-time service at 1000 DEG C.

The application discloses a fluorite tailing waste residue production method of aluminum fluoride, and relates to the technical field of aluminum fluoride production processes. The fluorite tailing waste residue production method of aluminum fluoride comprises the following steps: step one, mixing the purified fluorite tailing and concentrated sulfuric acid according to a proportion, and heating and reacting in a rotary kiln to generate hydrogen fluoride gas; and step two, passing the hydrogen fluoride gas into a fluidized bed, and fluidizing and reacting the hydrogen fluoride gas in the fluidized bed in a posture of rotating around an aluminum hydroxide bed layer, and driving the aluminum hydroxide bed layer to tumble under the flow of the hydrogen fluoride gas. Through the driving of a rotating assembly in the fluidized bed, the hydrogen fluoride gas is driven to rotate around the aluminum hydroxide bed layer for fluidization and combination reaction, so that the hydrogen fluoride gas always passes through the aluminum hydroxide bed with uniform thickness, and the hydrogen fluoride gas acts on the uniform tumbling fluidization reaction of the aluminum hydroxide bed layer.

The utility model discloses a full -automatic fluorite sand production line device, it includes base, and the upper surface of base is fixedly connected with processing box through support frame, and the side surface of processing box is fixedly connected with no. The output of no. The outside fixed connection of axle body has the disc body, and the inside fixed connection of disc body has the pressure crushing cylinder and the positioning shaft, and the outside swing joint of positioning shaft has the beating hammer, and the bottom of processing box is slidably connected with the first screening net through the mouth, and the mouth fixed connection of processing box has the second screening net. Through above -mentioned structure, through the axle body drive positioning shaft makes beating hammer can carry out fling and hit, and the pressure crushing cylinder and beating hammer cooperate, form multistage crushing effect, then through the cam to the plate body and resist, thereby make the first screening net can produce high -frequency vibration, effectively prevent the screen hole and block, in addition, cooperate the second screening net fixed in the first screening net top, can form the grading screening structure.

The application relates to a high-temperature-resistant high-entropy ceramic battery shell and a preparation method thereof. The battery shell comprises a battery shell base material and a high-entropy oxide ceramic coating attached to the surface. The coating comprises an organic-inorganic hybrid cross-linked network and a nano ceramic powder; the powder has a single cubic phase fluorite structure, and a general chemical formula is AB2O4, wherein a rare earth element is a positive trivalent element not containing cerium. The powder particle size distribution satisfies D50 / D90 < 2.5, and a coating and a base material interface form a covalent bond. During preparation, a nano slurry is obtained through high-temperature calcination and sand milling, a bonding system is constructed by combining a silane coupling agent and an inorganic sol, and a high-adhesion coating is generated in situ through coating and low-temperature curing. The application solves the thermal mismatch combination problem of high-entropy ceramics and a metal base material, and significantly improves the limit thermal protection performance of the battery shell under a transient working condition of more than 1600 DEG C.

The application relates to a high-entropy rare earth hafnate ceramic coating material and a preparation method thereof, and belongs to the technical field of high-entropy materials. The phase composition of the coating material is (Y 0.2 Yb 0.2 Ho 0.2 Er 0.2 Tm 0.2 )2Hf2O7, which is a single-phase defect fluorite structure; the raw material powder is fully and uniformly mixed through wet ball milling, and then the raw material powder mixture is alloyed through a solid-phase sintering process to prepare the single-phase coating material, wherein the high-entropy rare earth hafnate ceramic element is uniformly distributed, the thermophysical performance is excellent, the high-temperature phase is stable, the coating material has low thermal conductivity and high thermal expansion coefficient, and has a wide application scene in the field of key high-end equipment thermal protection coating.

The utility model discloses a dust removal device for fluorite ore processing, which comprises a dust removal box, one side of the dust removal box is provided with an industrial exhaust fan for absorbing dust, the other side of the dust removal box is provided with a dust suction port, the top of the dust removal box is sequentially provided with three groups of filter screen plates for filtering particulate matters, and the tops of the filter screen plates are fixedly connected with limiting plates. A pinching block is fixed in the top center of the limiting plate; and three groups of notches are sequentially formed in the top of the dust removal box, and filter screen plates are slidably connected into the notches. By arranging the dust removal box, the industrial exhaust fan, the dust suction port, the notch, the filter screen plate, the limiting plate, the pinching block and other components, dust generated by fluorite ore machining can be conveniently removed, and the surrounding machining environment is improved; then, a filter screen plate is arranged, so that particulate matters contained in the dust can be conveniently filtered and fall into the inner bottom of the dust removal box to be collected, and subsequent cleaning is facilitated; and in addition, damage of the particulate matter to internal devices of the industrial exhaust fan can be reduced conveniently.

The invention relates to the technical field of thermal barrier coating materials, in particular to an unequal-ratio Ce doped pyrochlore and fluorite double-phase high-entropy rare earth zirconate thermal barrier coating material and a preparation method thereof. The chemical composition formula of the thermal barrier coating material provided by the invention is (La < 0.2 > Ce < 0.1 > Sm < 0.1 > Dy < 0.2 > Yb < 0.2 > Sc < 0.2 >) < 2 > Zr < 2 > O < 7 >, (La < 0.2 > Sm < 0.2 > Yb < 0.2 > Sc < 0.2 > Y < 0.1 > Ce < 0.1 >) < 2 > Zr < 2 > O < 7 >, and (La < 0.2 > Ce < 0.1 > Nd < 0.1 > Yb < 0.2 > Lu < 0.2 > Sc < 0.2 >) < 2 > Zr < 2 > O < 7 >. The thermal expansion performance of the prepared coating material is obviously improved under the conditions that the low thermal conductivity, the high mechanical property and the high sintering resistance are met at the same time, and therefore the high-entropy rare earth zirconate thermal barrier coating material of the Ce-containing double-phase structure is promoted, and it is guaranteed that the material is practically applied to the field of thermal barrier coating materials.

This invention relates to the field of welding materials technology, and proposes a stainless steel flux-cored welding wire and its preparation method. The stainless steel flux-cored welding wire consists of a flux core and an outer sheath covering the surface of the flux core. The flux core is composed of the following raw materials in weight percentages: rutile 8%~12%, fluorite 4%~6%, cryolite 1%~2%, potassium feldspar 0.1%~0.3%, zircon sand 0.1%~0.5%, metallic aluminum 0.2%~0.4%, metallic magnesium 0.3%~0.6%, metallic silicon 0.5%~1.0%, calcium carbonate 0.5%~1.5%, with the balance being iron powder. The weight percentages must satisfy (rutile + fluorite) / (metallic aluminum + metallic magnesium + metallic silicon) = 9~12. This technical solution solves the problem of insufficient porosity resistance in welds formed by stainless steel flux-cored welding wires in related technologies.

The application discloses a kind of multi-element rare earth zirconia materials resistant to molten sand dust erosion and a preparation method thereof, and belongs to the technical field of thermal barrier coating materials of aero-engine.The material is ZrO 2、 The main rare earth oxide Y2O3, the auxiliary rare earth oxide A2O3 and B2O3 are used as base raw materials, precisely proportioned, ball-milled and mixed, and a multi-element rare earth zirconia material is synthesized by a high-temperature solid-phase reaction method.The material exhibits the structural characteristics of a defect fluorite phase, is prepared into a dense ceramic block by dry pressing and high-temperature sintering, and has excellent performance, low thermal conductivity and high-temperature stability after its resistance to molten sand dust corrosion is investigated.The material of the application is suitable for application to thermal barrier coating materials of hot-end components of an aero-engine, significantly improves the resistance to high-temperature molten sand dust corrosion and service life of the components.The application solves the technical problems of high thermal conductivity, insufficient resistance to molten sand dust erosion and poor thermal stability of thermal barrier coating materials.

The invention discloses a solar molten salt furnace refractory brick capable of resisting thermal shock and a preparation method of the solar molten salt furnace refractory brick capable of resisting thermal shock and the preparation method of the solar molten salt furnace refractory brick. 3 to 5 percent of alpha-Al2O3 micro powder; 8 to 12% of kaolinite; 7-9% of high alumina bauxite; 4-6% of modified fluorite tailing ceramsite; 1-3% of a binding agent; 2.5-3% of refractory mortar; 5-10% of a regenerated bamboo fiber skeleton; mullite: the balance; the combined action of the modified fluorite tailing ceramsite and the regenerated bamboo fiber skeleton effectively improves the cold and heat shock resistance and high temperature molten salt erosion resistance of the brick body, and optimizes the performance of the brick body.

The application provides a 650MPa-grade ultra-supercritical high-temperature steel welding electrode and a coating and deposited metal, and belongs to the field of welding materials.The raw material of the coating comprises, in weight parts, 39-43 parts of magnesia, 30-35 parts of fluorite, 3-5 parts of dolomite, 5-10 parts of ferrosilicon, 2-5 parts of sodium titanate, 10-15 parts of metallic chromium powder, 0.1-0.4 parts of chromium oxide green, 0.1-0.3 parts of aluminum-magnesium alloy and 1.5-2.5 parts of sodium alginate.Through the research on the composition of the coating, the sodium titanate and the aluminum-magnesium alloy are added to stabilize the electric arc, the electric arc has stability and concentration when high-current welding is performed, the weld pool temperature is moderate, the fluidity of the molten iron is moderate, the electric arc blowing force is stable and concentrated, and the welding operation performance is good.