518 results about "Fluorite" patented technology

The invention discloses a high-oxygen-storage zirconium solid solution material and a preparation method, and belongs to the technical field of rare earth catalytic materials, and the method comprises the following steps: precursor preparation, ultrasonic dispersion, double-gradient precipitation, ultrasonic aging, solid-liquid separation, three-section roasting and furnace cooling. Through the synergistic effect of double-gradient precipitation and ultrasonic aging, coarse grains and non-uniform particle size distribution are avoided, and the material is not prone to abnormal growth of the grains and structural collapse in long-term high-temperature service. Meanwhile, according to the gradient roasting process, through step-by-step regulation and control of crystal densification and crystal lattice reconstruction, separation of a fluorite phase and a pyrochlore phase easily occurring in traditional low-temperature single-section roasting is reduced, a stable crystal phase structure is maintained, it is ensured that the material can still keep sufficient active surface and pore channel structures under the working conditions of high temperature and thermal shock alternation, and the performance of the material is improved. The oxygen storage capacity and the long-term durability of the catalyst carrier are obviously improved.

The invention relates to the technical field of fluorite ore beneficiation, discloses a fluorite ore flotation composite collecting agent and a preparation method and application thereof, and aims to solve the problems that an existing collecting agent is limited in applicability, insufficient in selectivity, poor in environmental stability and the like and is difficult to deal with separation of fluorite ore containing various impurities or under complex working conditions. The composite collecting agent is composed of dehydroabietylamine, sodium oleoyl sarcosinate, sodium silicate-citric acid composite salt, ethylene glycol butyl ether and a sodium carbonate-sodium bicarbonate buffer pair, all the components have a synergistic effect, dehydroabietylamine provides selective collecting and fine particle agglomeration functions, sodium oleoyl sarcosinate enhances adsorption stability, the composite salt inhibits gangue in a targeted mode, and therefore the adsorption efficiency is improved. Buffer pairs and ethylene glycol butyl ether guarantee the environmental adaptability of a system. The collecting agent can adapt to various fluorite ores with high sulfur, high silicon, low temperature and the like, can stably play a role under different water quality and working conditions, realizes efficient separation of fluorite and impurities, improves the separation efficiency and the concentrate quality, and is flexible in preparation process and convenient for industrial application.

This application relates to the field of metal surface treatment materials, specifically disclosing a silicon-integrated inorganic supercrystalline thermal energy powder and its preparation and application methods. The silicon-integrated inorganic supercrystalline thermal energy powder comprises raw material A and raw material B. Raw material A includes the following: magnesium oxide, sodium fluoroaluminate, sodium polyphosphate, zinc oxide, crystalline tin tetrachloride, silicon dioxide, and boric acid. Raw material B includes the following raw materials in parts by weight: spodumene, lithium carbonate, titanium dioxide, zinc silicate, sodium carbonate, antimony trioxide, albite, fluorite, boric acid, sodium hydroxide, and yttrium oxide. The inorganic supercrystalline thermal energy powder of this application has advantages such as corrosion resistance and oxidation resistance, good thermal stability, no damage from thermal cycling, high hardness, wear resistance and high temperature resistance, energy saving, water scale reduction, and the ability to replace organosilicon high-temperature resistant special coatings, baking paints, enamel paints, and ceramic floor glazes.

The invention discloses a method for measuring the content of calcium fluoride in dolomite-containing fluorite mine. The method comprises an acetic acid solution, a hydrochloric acid solution, a triethanolamine solution, a potassium hydroxide solution and boric acid. The method for measuring the content of calcium fluoride in the dolomite-containing fluorite mine comprises the following steps: S1, reagent proportioning; s2, preparing a calcium standard solution; s3, preparing an EDTA standard titration solution; s4, selecting an instrument; s5, preparing a sample; s6, step analysis; s7, content correction and determination; and S8, calculating a result. The invention belongs to the technical field of calcium fluoride content determination, and particularly relates to a method for measuring the content of calcium fluoride in dolomite-containing fluorite mine, compared with the prior art, the method solves the problem of dolomite dissolution when calcium carbonate is leached by acetic acid, and the content of calcium fluoride in the fluorite mine can be measured by accurately calculating the dissolution amount of dolomite. The measured calcium fluoride content is clearer, more reasonable and more reliable and approaches to a true value, and the process operation is simple and rapid, and is suitable for the requirements in the fields of mine production, assay detection and the like.

The invention provides a flux-cored wire, a manufacturing method of the flux-cored wire, a gas-shielded arc welding method and deposited metal. The flux core of the flux-cored wire comprises the following components in percentage by weight: 27.5 to 29.5 percent of rutile, 1.0 to 2.0 percent of ferrovanadium, 0.2 to 0.3 percent of bismuth oxide, 0.8 to 1.2 percent of cryolite, 12.5 to 15.0 percent of high-carbon ferrochrome, 5.0 to 6.5 percent of electrolytic manganese metal, 4.5 to 6.5 percent of metal nickel, 1.0 to 3.0 percent of feldspar, 1.5 to 2.5 percent of ferromolybdenum, 1.0 to 2.5 percent of aluminum-magnesium alloy, 32.0 to 35.0 percent of micro-carbon ferrochrome, 0.5 to 1.5 percent of ferrotitanium, 1.15 to 2.85 percent of fluorite, 0.8 to 2.0 percent of ferrosilicon and 0.6 to 1.5 percent of lithium carbonate. In the invention, the alloy content of deposited metal and the hardness of the surfacing layer are controlled by adjusting the percentage of the flux core in the total weight, the surfacing layer with excellent corrosion resistance and proper hardness is ensured to be obtained, and the service life of the wrapper roller is prolonged. And meanwhile, by controlling all the components in the flux powder of the flux-cored wire and the proportion, the flux-cored wire has excellent welding process performance.

The invention relates to a mineral resource prediction method and system for a shallow-hidden fluorite mine, and the method comprises the steps: carrying out the metallogenic characteristic analysis of a typical fluorite deposit, and constructing a prospecting prediction conceptual model according to an analysis result; performing evaluation analysis on the resource potential, the mineralization favorable degree and the prospecting prediction matching degree of the prospecting area to obtain an optimal mineralization prediction geological unit; on the basis of the prospecting prediction conceptual model, a prospecting prediction quantitative model is obtained in combination with geological information of the typical fluorite deposit, and fluorite mine quantitative prediction is conducted on the optimal metallogenic prediction geological unit through the prospecting prediction quantitative model, so that fluorite mine prediction quantity is obtained; and under the condition that the fluorite mine prediction amount reaches a set threshold value, fluorite mine resource evaluation analysis is carried out according to the fluorite mine prediction amount in combination with the obtained geological exploration data of the ore searching area, and fluorite mine resource distribution data is obtained. From the perspective of green prospecting, the method can quickly and accurately carry out prospecting prediction on shallow hidden or deep fluorite mines.

The present invention provides a calcium-based thermochemical heat storage material modified with high-entropy fluorite oxide and a preparation method thereof. The material comprises a calcium-based material and a high-entropy fluorite oxide, with the calcium-based material accounting for 70-85% by mass. The calcium-based material is calcium oxide, and the high-entropy fluorite oxide is a fluorite-structured oxide formed by zirconium, cerium, lanthanum, neodymium, and ytterbium, with a molar ratio of 1:1:1:1:1 for the oxides of zirconium, cerium, lanthanum, neodymium, and ytterbium. The invention utilizes the high-entropy fluorite oxide as an anti-sintering component to disperse calcium oxide and prevent its sintering, while simultaneously promoting the adsorption, dissociation, and migration of CO2 on the surface of the material, thereby enhancing the cycling stability and energy density of the heat storage material.

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 invention provides a high-toughness austenitic stainless steel welding rod for 5Ni steel and a preparation method of the high-toughness austenitic stainless steel welding rod. The welding rod comprises a core wire and a coating coated on the surface of the core wire, and based on the total amount of the core wire, the core wire comprises the following components in percentage by mass: less than or equal to 0.09% of C, less than or equal to 0.15% of Si, 1.6-2.5% of Mn, 18.5-20.5% of Cr, 12.5-14.5% of Ni, 2.1-3.2% of Mo and 0.06-0.18% of Ti; 0.12-0.24% of Al, less than or equal to 0.007% of S, less than or equal to 0.008% of P, less than or equal to 0.006% of O, less than or equal to 0.001% of H, less than or equal to 0.012% of S + P, and the balance Fe and inevitable impurities. On the basis of the total amount of the coating, the coating comprises, by mass, 28-38% of carbonate, 15-20% of fluorite, 1-3% of lithium fluoride and sodium fluoride, 8-12% of synthetic mica, 3-6% of potassium silicotitanate, 2-4% of zircon sand, 9-15% of electrolytic manganese metal, 2-4% of ferrotitanium, 2-5% of passivated nickel-magnesium alloy, 1-3% of atomized ferrosilicon, 1-3% of lanthanum cerium fluoride, 1-3% of tungsten and molybdenum, 3-5% of nitrided ferrochromium and 1-2% of CMC. The welding rod is good in all-position welding controllability, extremely low in air hole sensitivity and excellent in low-temperature toughness, and can meet the requirements for high-quality and efficient welding of 5Ni steel.

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 invention relates to the technical field of fluorite ore dressing, discloses a method for flotation of fluorite in dolomite type fluorite ore, and aims to solve the co-flotation problem caused by similar surface properties of dolomite and fluorite and the characteristic of complex dissociation of intergrowth by constructing a gradient inhibition system and combining stage selective regrinding and flotation closed-loop processes. Linkage control of dissociation and suppression is realized; the core of the method is to dynamically adjust the reagent ratio and dosage through multi-section separation, optimize the mineral dissociation degree in cooperation with double-node regrinding, and strengthen targeted inhibition of dolomite and accurate collection of fluorite. According to the method, fluorite and dolomite can be efficiently separated, high-grade fluorite concentrate is stably produced, the method is suitable for dolomite type fluorite ores of different structures, the resource recovery efficiency is remarkably improved, and technical support is provided for resource utilization of the complex fluorite ores.

The utility model discloses an airflow type fluorite concentrate powder conveying device, and particularly relates to the technical field of ore powder conveying devices, the airflow type fluorite concentrate powder conveying device comprises a supporting frame, a flow guide conveying assembly is arranged on the supporting frame, the flow guide conveying assembly comprises a flow guide cylinder arranged at the top of the supporting frame, an impeller is arranged in the flow guide cylinder, and a plurality of crushing teeth are arranged on the inner wall of the impeller. The flow guide conveying assembly is arranged, the impeller rotates to extract mineral powder, meanwhile, large material blocks are ground through the crushing teeth, ground raw materials are filtered through the filter screen and then conveyed into the extension cylinder, and the situation that the mineral powder with different sizes is mixed together is avoided; when the eccentric disc rotates, the pull rod is driven to rotate and displace, and then the piston and the one-way valve are pulled to slide in the discharging pipe, so that mineral powder in the extension cylinder and the transfer cylinder can be sprayed out through the one-way valve.

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 provides a molten iron desulfurizing agent after steel scrap is added into a ladle. The molten iron desulfurizing agent is used for carrying out pretreatment desulfurization after the steel scrap is added into the ladle; the molten iron desulfurizing agent comprises lime, fluorite and carbon particles, wherein the mass percent of the lime is 30-35%, the mass percent of the fluorite is 20-25%, and the mass percent of the carbon particles is 40-50%. The problems that in the prior art, under the high scrap steel ratio, scrap steel of a ladle is not molten, the molten iron fluidity is poor, the desulfurization efficiency is low, and the consumption of important components (lime and fluorite) of a desulfurizing agent is large can be solved. The invention further provides a molten iron desulfurization method after the scrap steel is added into the ladle, pretreatment desulfurization is carried out after the scrap steel is added into the ladle, and the molten iron desulfurization agent after the scrap steel is added into the ladle is adopted for desulfurization.

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 provides a lanthanum-loaded fluorite ball seed crystal and a method for treating fluorine-containing wastewater by using the lanthanum-loaded fluorite ball seed crystal. The preparation method of the lanthanum-loaded fluorite ball seed crystal comprises the following steps: firstly, mixing sodium silicate and polyacrylamide, and ultrasonically and uniformly dispersing the mixture in an aqueous solution to obtain a composite binder; then calcium fluoride powder and a composite binder are evenly mixed and then put into a pelletizer to be pelletized, and fluorite ball particles are obtained after the mixture is taken out and dried; and finally, soaking the obtained fluorite ball particles in a lanthanum solution, and roasting to obtain the lanthanum-loaded fluorite ball seed crystal. When the lanthanum-loaded fluorite ball seed crystal is used for fluorine-containing wastewater treatment, the fluorite ball is used as the seed crystal to induce calcium fluoride to crystallize on the surface of the fluorite ball, and fluorine ions in a solution are effectively removed. According to the method, the fluorine removal rate is high, fluorite ball seed crystals after induced crystallization and calcium fluoride loaded on the surface of the fluorite ball seed crystals are high in purity and can be recycled for the second time, waste such as sludge is not generated in the reaction process, and therefore an additional foreign matter removing device is not needed.

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 present invention discloses a method for treating fluorine-containing wastewater and recycling large-particle fluorite powder, which relates to the technical field of fluorine-containing wastewater treatment and resource recovery. The method comprises the following steps: Step S1, raw material preparation; Step S2, seed crystal activation; Step S3, impurity removal treatment of the fluorine-containing wastewater; Step S4, precipitation reaction; and Step S5, subsequent treatment. This method achieves a higher removal rate of fluoride ions and total organic carbon in the fluorine-containing wastewater, and the recycled fluorite powder has higher purity and larger particle size.

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.