703 results about "Fluorite" patented technology

The invention relates to the technical field of mineral processing data processing, in particular to a preparation method of a high-calcium fluorite and barite paragenic ore combined inhibitor, which comprises the following steps: collecting multi-source process mineralogy data output by an X-ray fluorescence spectrometer, an automatic mineral analyzer and the like, converting the multi-source process mineralogy data into a structured format, and constructing a process mineralogy database; based on historical data of a database, a random forest algorithm is adopted to train a correlation model, the correlation rule of mineral characteristics such as calcite content, fluorite particle size distribution and barite monomer dissociation degree and the inhibitor ratio is learned, and parameters of the optimization model are fed back through a flotation test. The combined inhibitor solves the problem of selective separation caused by similar surface properties through a synergistic effect of covering active sites of fluorite calcium by modified water glass, regulating active sites of barite barium by citric acid and assisting in enhancing inhibition by modified starch, and solves the problem of low efficiency of multi-source data integration through structured data processing and model closed-loop optimization; the flotation separation efficiency and the concentrate grade are improved.

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 belongs to an aluminum fluoride production technology, and particularly relates to a process and a system for producing aluminum fluoride by matching with a low-grade fluorite dry method, fluorite powder and sulfuric acid are added into a pre-reactor to be uniformly mixed and then are guided into a reaction furnace to be heated, and when the reaction furnace rotates, a free spiral structure in the reaction furnace rotates to promote the reaction of the fluorite and the sulfuric acid; discharging the calcium sulfate through a discharging spoon at the discharging end of the reaction furnace, and collecting the hydrogen fluoride volatilized from the reaction furnace; volatilized hydrogen fluoride enters a pre-purification tower and is treated to obtain purified hydrogen fluoride gas, the purified hydrogen fluoride gas and dried aluminum hydroxide are added into a fluidized bed to react to obtain aluminum fluoride and tail gas, and the tail gas enters a tail gas recovery treatment system. The problems that low-grade fluorite is poor in resource utilization rate, prone to crusting in a reaction furnace, low in fluorine utilization rate and the like are solved.

The invention relates to the technical field of steelmaking, in particular to a steelmaking process based on a Q420 slab, which comprises the following steps: molten iron, scrap steel and pig iron are put into a converter for melting to obtain molten steel, and the molten steel is smelted in the converter and then transferred into a ladle refining furnace for refining; acquiring a fluctuation period to determine whether the removal efficiency of the inclusions in the molten steel is qualified or not; determining the nodulation condition of the slag layer based on the judgment result that the removal efficiency of the inclusions is unqualified so as to determine that the viscosity of the whole slag layer is unqualified or the viscosity of the local slag layer is unqualified; the addition amount of fluorite is determined based on the judgment result that the viscosity of the overall slag layer is unqualified, or the pulse frequency of argon or the refining duration of molten steel is adjusted based on the judgment result that the viscosity of the local slag layer is unqualified; and the refined molten steel is subjected to vacuum degassing treatment and then subjected to continuous casting to obtain a slab, and after the slab is subjected to flaw detection, defect characterization parameters are determined so as to adjust the attenuation rate threshold value. The purification degree of the molten steel is 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.

The invention relates to the technical field of fluorite flotation reagents, in particular to a preparation method of a fluorite flotation collecting agent. The specific preparation method comprises the following steps: carrying out sulfonation reaction on sulfuric acid and benzene to obtain sulfonation reaction liquid; the method comprises the following steps: by taking oleic acid or acid oil as a raw material, adding sulfonation reaction liquid at 10-20 DEG C, and carrying out stirring reaction; adding alkali liquor to carry out neutralization reaction, controlling the temperature to be less than or equal to 80 DEG C, and adjusting the pH value to be 7-8; and a water phase is separated and removed, and a mixture containing oleate, sulfated oleate, hydroxyl oleate and stearic acid benzene sulfonate is obtained and serves as the fluorite flotation collecting agent. By controlling the proportion of sulfuric acid to benzene and adding oleic acid, on the basis of reducing product benzene residues, the collecting capacity is improved, good selectivity is achieved, and the problem of aromatic hydrocarbon residues existing in a flotation collecting agent prepared from aromatic hydrocarbons such as benzene as raw materials is solved.

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 belongs to the field of smelting, and particularly relates to a smelting method for improving cleanliness of austenitic stainless steel. The method comprises the following steps: melting raw materials in an electric furnace, and tapping; carrying out AOD (argon oxygen decarburization) refining; and LF refining. The method comprises the following steps: controlling the contents of C and Si elements and the tapping temperature during tapping of molten raw materials in an electric furnace; the temperature of molten steel obtained through AOD refining is set, FeSi is used for primary reduction, the content of Si is controlled, reduction slag lime and fluorite are added for slagging in secondary reduction, the target requirement for alkalinity of reduction slag is controlled, aluminum particles are added, and the rest is reduced through calcium silicate blocks; in the LF refining process, CaSi powder is adopted for diffusion deoxidation, Al deoxidation is not used, the oxygen target is controlled, the white slag retention time is controlled, the argon feeding stirring time and the soft argon blowing time are controlled, and crane ladle pouring is carried out, so that the inclusion requirement of the current high-end 304 austenitic stainless steel can be met, and the inclusion is reduced to be smaller than or equal to 1.0 grade from the 1.5 grade or 2.0 grade.

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 invention discloses a radiation cooling exterior wall brick and a preparation process thereof, and relates to the technical field of ceramic bricks. The radiant cooling exterior wall tiles include a body, a base glaze layer, a pattern layer and a protective glaze layer from the inside to the outside. The base glaze layer includes the following components in parts by mass: 40-60 parts of base glaze ceramic base glaze, 15-35 parts of cooling powder, 6-12 parts of calcined talc, 4-8 parts of calcined zinc oxide, 3-6 parts of dolomite, 2-4 parts of fluorite, 3-6 parts of calcined kaolin, 0.2-0.5 parts of sodium carboxymethyl cellulose, 0.2-0.5 parts of sodium tripolyphosphate and 40-55 parts of water; the protective glaze layer includes the following components in parts by mass: 60-70 parts of protective glaze ceramic base glaze, 10-20 parts of cooling powder, 5-10 parts of albite, 3-5 parts of calcined talc, 2-4 parts of calcined zinc oxide, 0.2-0.5 parts of sodium carboxymethyl cellulose, 0.2-0.5 parts of sodium tripolyphosphate and 40-55 parts of water. The present invention adjusts the component ratio of the base glaze layer and the protective glaze layer and simultaneously adds cooling powder for compounding, thereby ensuring the basic performance of the wall tile while improving its reflectivity and emissivity to infrared and visible light.

The invention discloses a technological method for regulating and controlling the melting point and viscosity of aluminum deoxidized steel refining slag based on rare earth cerium, and belongs to the technical field of ferrous metallurgy refining. The redox characteristic of Ce and slag system structure modification are combined, the limitation of traditional single component adjustment is broken through, and the composite oxide effect of Ce is utilized: Ce generates CeO2 and Ce-Al-O composite oxide at high temperature, so that the liquidus temperature of a slag system is remarkably reduced, and the melt structure is optimized; by limiting the addition amount of Ce and balancing the cost and performance, the situation that the oxidability of a slag system is out of control due to excessive Ce is avoided, and the thermodynamic stability of the slag system is improved; the addition of Ce inhibits the generation of high-melting-point calcium aluminate and promotes the formation of a low-melting-point phase; by adding Ce, melting point reduction, viscosity optimization and molten steel purification are achieved at the same time, the additive is superior to an existing single-function additive, traditional fluorite is replaced, and fluorine pollution is reduced. The invention aims to provide the same environment-friendly and efficient method capable of accurately regulating and controlling the physicochemical properties of the slag.

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 belongs to the technical field of glass materials, and particularly relates to black high-hardness heat-resistant microcrystalline glass ware and a preparation method thereof. Silicon dioxide, sodium oxide, aluminum oxide, potassium oxide, boric oxide, magnesium oxide, calcium oxide, zinc oxide, sodium fluosilicate, iron oxide, manganese oxide, fluorite, lithium oxide, metal manganese coated with silicon dioxide and schorlite are used as raw materials, and the black high-hardness heat-resistant microcrystalline glass ware is prepared through the processes of high-temperature melting and mixing, compression molding, annealing and tempering. The black high-hardness heat-resistant microcrystalline glass ware is excellent in performance, high in hardness and good in heat resistance, and has potential market value.

The invention provides a fluorite flotation composite inhibitor and a preparation method and application thereof.The composite inhibitor can be used for flotation of phosphorus-containing high-calcium low-grade fluorite mine and comprises, by mass, 1-5 parts of sodium hexametaphosphate, 8-40 parts of sodium humate, 2.8-14 parts of tannin extract, 5-40 parts of water glass and 0.2-1 part of sodium acrylate. The preparation method comprises the following steps: S1, dissolving sodium hexametaphosphate, water glass and sodium acrylate in water to obtain a mixed solution; and S2, adding the tannin extract and the sodium humate into the mixed solution, and uniformly mixing the tannin extract and the sodium humate. The fluorite flotation composite inhibitor is high in selective inhibition performance, small in influence on floatability of fluorite while inhibiting calcite and apatite, better in selective inhibition effect compared with a single traditional inhibitor such as water glass and the like, capable of achieving efficient separation of calcite, apatite and other calcium-containing gangue minerals and fluorite and capable of achieving efficient flotation of fluorite. And high-quality and high-recovery-rate fluorite concentrate is obtained, and the comprehensive benefits of the flotation process are greatly improved.

The invention provides a beneficiation-metallurgy combined comprehensive utilization process for dilute separation tailings, which comprises the following steps: carrying out ore grinding and flotation treatment on the dilute separation tailings to obtain fluorite rough concentrate and flotation tailings; magnetically roasting the mixed reducing agent and the flotation tailings, and magnetically separating to obtain magnetically separated rough concentrate and magnetically separated rough tailings; carrying out fine grinding and magnetic separation on the magnetic separation rough concentrate to obtain a magnetic separation iron concentrate product and magnetic separation concentrate tailings; the magnetic separation coarse tailings and the magnetic separation fine tailings are mixed, and then acid washing liquid and acid washing residues are obtained after acid washing and solid-liquid separation are conducted in sequence; and carrying out pressurized acid leaching, solid-liquid separation and extraction on the pickling residues to obtain scandium oxide and niobium oxide. By adopting the flotation-magnetizing roasting-magnetic separation-acid pickling-pressurized acid leaching combined process, the fluorite coarse ore, the iron ore concentrate, the rare earth leaching solution and the niobium-scandium leaching solution are obtained, the comprehensive utilization rate of the tailings is greatly increased, the discharge amount of the tailings is reduced, the acid consumption of tailings treatment is reduced, the environmental pressure is reduced, and the benefits of enterprises are improved.

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.

A thermal barrier coating (TBC) material with high fracture toughness, calcia-magnesia-alumino silicate (CMAS) corrosion resistance, and ultra-high-temperature sintering resistance, and a preparation and use thereof are provided, belonging to the technical field of high-temperature / ultra-high-temperature TBCs. In the TBC material, ZrO2 is co-doped with different rare earth oxides and a crystal defect concentration and a lattice distortion degree are controlled by a doping amount of the rare earth oxides, resulting in a fully-stabilized cubic fluorite crystal structure showing no phase change at a room temperature to 1,600° C. Moreover, the material exhibits high toughness, CMAS corrosion resistance, ultra-high-temperature sintering resistance, and long service life.

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 a novel high-manganese austenitic steel manual arc welding rod for frog repair. The welding rod comprises 70-80 wt% of a welding rod core and 20-30 wt% of a coating, wherein the outer surface of the welding rod core is coated with the coating. The welding rod core comprises the following chemical components in percentage by weight: 0.95 to 1.2 weight percent of C, 36 to 46 weight percent of Mn, 2.0 to 4.0 weight percent of Mo, 1.0 to 5.0 weight percent of Cr, 0.5 to 6.0 weight percent of Al, 0.5 to 6.0 weight percent of V, 0.5 to 4 weight percent of Cu, 0.1 to 1.0 weight percent of Si, less than or equal to 0.002 weight percent of P, less than or equal to 0.002 weight percent of S and the balance of Fe and inevitable impurities; the coating comprises the following chemical components in percentage by weight: 20 to 30 percent of marble, 10 to 20 percent of fluorite, 10 to 20 percent of rutile, 4 to 6 percent of 45 ferrosilicon, 5 to 8 percent of low-carbon ferromanganese, 5 to 8 percent of sodium carbonate and the balance of iron powder. The welding rod is matched with frog base metal, good metallurgical bonding is generated, and the welding rod has the advantages of being low in hot crack sensitivity, excellent in impact wear resistance, high in strength, hardness and toughness, low in cost, simple in component system, excellent in operation manufacturability and the like.

The invention relates to the technical field of casting powder, in particular to electromagnetic ejection duplex stainless steel special casting powder which comprises the following raw materials: red mud, wollastonite, modified fluorite, borax, spodumene and blast furnace slag. The fluorite is treated through yttrium oxide modification and forsterite coating processes, release of harmful fluorine ions at high temperature is effectively inhibited, and erosion to refractory materials is greatly reduced; meanwhile, the stability of particles is enhanced through forsterite coating, and the comprehensive use effect of the casting powder is improved; in addition, the modified fluorite is beneficial for forming a slag film with better lubricity, and slag entrapment and casting blank surface defects are reduced.

The invention belongs to the field of flotation, and particularly relates to a collecting agent, a flotation reagent and a method for fluorite flotation, and the collecting agent comprises a compound shown in the formula 1 (# imgabs0 #). Researches show that the combination of ortho-COOR,-SO3-and beta-COOR of the structure shown in the formula 1 can realize intramolecular synergy, can enhance the targeting ability and selectivity of fluorite, and particularly can improve the low-temperature collecting ability, collecting selectivity and low-temperature collecting stability of fluorite.

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 invention discloses a beneficiation method for recovering micro-fine particle cassiterite and fluorite from cassiterite tailings, and belongs to the technical field of beneficiation. The method comprises the steps that cassiterite tailings are subjected to reselection, obtained reselected bulk concentrate is subjected to ore grinding and then sequentially subjected to magnetic separation iron removal and flotation desulfurization, and the desulfurized tailings are subjected to cassiterite flotation with metal ion modified water glass with the valence higher than bivalent as an inhibitor and a metal-based multi-ligand organic complex as a collecting agent, so that cassiterite concentrate and flotation tailings are obtained; and the flotation tailings and the gravity separation tailings are combined, water glass or acidified water glass serves as an inhibitor, aliphatic carboxylic acid and heavy alkyl benzene sulfonate serve as a composite collecting agent, fluorite flotation is conducted, and fluorite concentrate is obtained. According to the method, the technological process is simple, the ore grinding and agent cost can be remarkably reduced, and selective separation of cassiterite and fluorite is achieved while efficient recycling of micro-fine particle cassiterite is achieved.

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.