217 results about "Baryte" 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 method for estimating barite ore density by using BaSO4 content, and relates to the technical field of ore density detection, and the method comprises the following steps: collecting a barite ore sample, and pre-treating the barite ore sample; based on the pretreated barite ore sample, component analysis is carried out through an X-ray fluorescence spectrum technology, and the BaSO4 content is obtained; measuring the pretreated barite ore sample through an experimental measurement method to obtain the dynamic density of the barite ore sample; based on the BaSO4 content and the dynamic density of the barite ore sample, a corrected density value is obtained through a nonlinear weighting method; constructing a density detection model based on the random forest model; and based on the corrected density value and the BaSO4 content, obtaining an ore density detection value through a density detection model. According to the method, the BaSO4 content and the dynamic density of the ore are combined, the corrected density value is obtained through the nonlinear weighting method, and the accuracy, reliability and efficiency of density detection are improved.

The invention belongs to the field of light low-carbon concrete, and discloses hydraulic low-carbon concrete containing barium sulfate barite as well as a preparation method and application of the hydraulic low-carbon concrete. The concrete is prepared from 42.5-grade Portland cement, barium sulfate barite powder, modified polypropylene fiber, industrial waste residue lightweight aggregate, boron carbide powder, nano silicon dioxide, a polycarboxylate superplasticizer, a composite exciting agent and water according to specific parts by weight. Wherein the barium sulfate barite powder is subjected to graded proportioning and calcination activation, the modified polypropylene fiber is treated by plasma and a silane coupling agent, the industrial waste residue lightweight aggregate is formed by compounding fly ash ceramsite and steel slag microbeads, and the composite exciting agent is composed of specific components. The concrete is high in compressive strength, low in dry density, excellent in neutron shielding and gamma ray attenuation performance and low in chloride ion diffusion coefficient. The preparation method comprises the steps of premixing modification, gradient stirring, vibration compaction and steam curing. The concrete is suitable for construction of a nuclear reactor containment, a radioactive waste repository and a nuclear medicine protection wall.

The invention relates to the technical field of production quality traceability, in particular to a barite powder production quality traceability-oriented data fusion method and a barite powder production quality traceability-oriented data fusion system. The method comprises the following steps: collecting mineral parameters of barite ores in raw ore sampling points as raw ore batch data; collecting monitoring data of the crusher; according to raw ore batch data and crusher monitoring data, the granularity change condition of barite is determined; collecting control data of the grinding device; determining the grain size refining condition of the barite according to the control data of the grinding device and the grain size change condition of the barite; dry packaging control data and packaging weighing results are collected; calculating the final particle size of the product based on the barite particle size refining condition, the drying packaging control data and the packaging weighing result; predicting a target quality index according to the final granularity of the product; and comparing index differences between the target quality index and the actually obtained quality inspection data of the finished product one by one so as to execute difference traceability. According to the invention, the quality controllability and tracing efficiency of barite powder production can be improved.

The invention discloses a surface lipophilic modified barite weighting material as well as a preparation method and application thereof, and belongs to the technical field of drilling fluids. The surface lipophilic modified barite weighting material comprises barite and a surface modifier, and the surface modifier comprises a copolymer formed by polymerizing a monomer A, a monomer B, a monomer C and a monomer D. According to the invention, the lipophilicity of the barite is chemically modified by the surface modifier, and all monomers have a synergistic effect, so that when the grafted and modified barite weighting material is used as the weighting agent of the oil-based drilling fluid, the dispersity and the stability of particles in the oil-based drilling fluid can be improved, and the rheological property, the plugging property and the high-temperature resistance of the drilling fluid can be adjusted.

The invention discloses a method for quantitatively testing the content of organic carbon and disseminated particle size in gold ore, and belongs to the technical field of gold ore detection. The method comprises the steps of sample preparation and quantitative testing, wherein palm wax serves as a cementing agent, barite serves as a standard sample, and a to-be-tested sample is prepared through melting, mixing, consolidation, polishing and carbon spraying; the quantitative test is based on an automatic process mineralogy test system, palm wax backgrounds are removed through backgrounds deduction, an energy spectrum library is established to recognize organic carbon and barite particles, the area ratio of the organic carbon and the barite particles is measured, the mass ratio is converted by combining the density ratio, the organic carbon content of raw ore is inversely calculated, and meanwhile, the particle size distribution of the organic carbon is counted. The method solves the problem that the content and granularity of organic carbon cannot be accurately quantified at the same time in the prior art, has the advantages of high test precision, high efficiency, comprehensive parameters and simplicity and convenience in operation, and can provide key data for optimization of a gold ore cyanidation leaching process.

The application discloses a kind of concrete crack self-repairing agent suitable for marine corrosion conditions, including component one and component two;The component one, component two are all core-shell structure;The outer shell of component one is polymer film;Inner layer includes the following components by mass percentage: 20%-30% barite powder, 50%-60% magnesium source, 20%-30% cement;The outer shell of component two is polymer film;Inner layer includes the following components by mass percentage: 20-30% barite powder, 5-10% microbial powder, 20-30% glucose, 20%-40% aluminum source, 10%-30% low-alkali cement.The repairing agent of the application is continuous grading solid particle pellet, and the fine aggregate of concrete is replaced with equal mass.By the synergistic effect of microbial mineralization and metal mineral hydration, the filling of concrete crack space and the solidification of invasive crack corrosion ions are realized, especially suitable for marine corrosion environment.

The invention discloses a new-type barite deposit mineralization mode construction method based on a same sedimentary fault. The method belongs to the field of geological exploration and mineral resource prediction, and comprises the following steps: analyzing the earth crust cracking activity history of an earthquake-Hangjian broken basin, and recovering a basin'checkerboard 'structure prototype; by means of field geological survey and research, drilling engineering, geophysics, remote sensing geological big data and the like, north-east-east-direction and north-west-direction co-sedimentary fault networks are identified and modeled, and a deep metallogenic fluid rising and jet flow channel is determined; the metallogenic process is concluded into a hydrothermal jet flow stage and an underwater gravity flow deposition stage, deep fluid is revealed to rise, jet flow and precipitate along a fault, and an ore-rich zone of a composite seabed fan body group is formed; and a geochemical prospecting prediction model combining trace element and sulfur isotope characteristics is established. The method systematically clarifies a coupling mechanism of ore control of the same sedimentary fault, ore-forming fluid migration and gravity flow deposition, and provides a theoretical basis and a technical means for prospecting prediction of the barite deposit in the Hendan-Hangjian fault basin.

The invention provides sanding-free natural superfine barium sulfate powder as well as a preparation method and application thereof, and belongs to the technical field of inorganic chemical filler preparation. The preparation method comprises the following steps: sequentially carrying out grinding, ball milling and two-time grading on barite particles to prepare barite raw powder; and carrying out surface modification treatment on the barite raw powder, and cooling to obtain the sanding-free natural superfine barium sulfate powder. Wherein a composite modifier is added during surface modification treatment, and the composite modifier is prepared by compounding a stearic acid emulsion and a tetrakis-neo-alkoxy bis (didecyl phosphorous acid acyloxy) titanate coupling agent. The composite modifier modifies the barite raw powder, not only reduces the oil absorption value of the superfine barium sulfate, but also reduces the surface energy of the product through the bonding effect, improves the dispersity of the product and the adhesive force with downstream resin, and can achieve the use fineness required by the product through high-speed dispersion when being applied to the water-based industrial paint. And the production efficiency is effectively improved.

The invention provides a soilless phase reservoir protection water-based drilling fluid as well as a preparation method and application thereof, and belongs to the technical field of drilling fluids. The drilling fluid is prepared from the following raw materials in parts by mass: 100 parts of water, 0.2-0.4 part of a first pH regulator, 1-3 parts of a deoxidant, 0.1-0.4 part of a tackifying and shear strength improving agent, 2-4 parts of a filtrate reducer, 4-6 parts of magnesium-aluminum hydrotalcite, 4-6 parts of micro-nano aluminum oxide, 4-6 parts of superfine calcium carbonate, 4-6 parts of a lubricant, 1-2 parts of a corrosion inhibitor and 70-660 parts of an inorganic salt weighting agent. The drilling fluid disclosed by the invention is excellent in high-temperature resistance, good in rheological property and excellent in filtrate loss reduction performance; the drilling fluid disclosed by the invention can be prepared into saturated CaCl2 and saturated CaBr2 systems, does not contain barite and clay, is high in mud cake acid solubility, has permeability recovery of more than 72% after plugging, is good in reservoir protection, and has potential of on-site large-scale application.

The invention discloses a method for judging barite deposition center by using siliceous rock thickness, and relates to the technical field of mineral resource exploration, and the method comprises the steps: collecting seismic wave reflection data and geological data, and carrying out the preprocessing; predicting the thickness of the siliceous rock stratum based on the processed seismic wave reflection data; the thickness of the siliceous rock stratum and the preprocessed geological data are input into a three-dimensional geological model, and a siliceous rock thickness space distribution diagram is generated; analyzing the spatial distribution diagram of the siliceous rock thickness to obtain a siliceous rock thickness change area; identifying a barite deposition center candidate area based on the siliceous rock thickness change area; and analyzing the barite deposition center candidate area by using a spatial analysis technology to obtain the spatial position of the barite deposition center. According to the method, the candidate area is subjected to multi-parameter optimization by utilizing a space analysis technology, and the barite deposition center position is accurately determined.

The invention discloses a method for simultaneously determining total barium and sulfur in barite by inductively coupled plasma emission spectrometry. In this method, the sample is decomposed by melting with sodium carbonate and sodium hydroxide. The molten slag is extracted with hot water, nitric acid and a chromium internal standard solution are added, the crucible and the beaker are washed with dilute hydrochloric acid, water is added and shaken well, heated to boiling gently on a hot plate and then taken off and shaken well. After cooling, it is determined on an inductively coupled plasma emission spectrometer. The method of the invention makes use of the characteristic that barium sulfate has a relatively large solubility in reverse aqua regia, enabling barium and sulfur to coexist stably, and then simultaneously determines total barium and sulfur by inductively coupled plasma emission spectrometry, which has the characteristics of high detection efficiency, high precision, simple operation and low cost, and solves the technical problems that when determining total barium and sulfur in barite by traditional methods, sulfur and barium are difficult to coexist in the solution, usually two different methods are required to complete the determination, and even barium and sulfur need to be separated in advance, resulting in a long process and low detection efficiency.

The invention relates to the technical field of mineral resource mining and mineral separation, and discloses a barite ore open-pit mining harmless mineral separation novel process which comprises the following steps: S1, adopting an open-pit mining mode, stripping surface coverings, and collecting barite raw ore; s2, raw ore primary washing and separation, specifically, the collected raw ore is washed with water, barite rough ore and primary tailings are separated out, and the primary tailings comprise ore washing muddy water and slag; s3, the ore washing muddy water generated in S2 is separated into coarse particle materials and fine muddy water in a physical separation mode, the coarse particle materials and the fine muddy water are 50 meshes or above, according to the novel barite ore open-pit mining harmless beneficiation technology, through all-component separation and resource utilization of tailings, a traditional tailing treatment mode is thoroughly changed, the ore washing muddy water generated by primary washing of raw ore is recycled, and the ore washing muddy water generated by secondary washing of the raw ore is recycled. Through physical separation, reselection and solid-liquid separation processes, fine sand products, soil backfill materials and process reuse water can be obtained through conversion, and no slurry waste residues exist.

The invention provides a drilling fluid and a preparation method thereof. The drilling fluid comprises the following raw materials: water, bentonite, sodium hydroxide, a filtrate reducer, an inhibitor, potassium chloride, a tackifier, a lubricant, a plugging agent, a film-forming agent and barite. Wherein the film-forming agent is prepared from the following raw materials in parts by weight: 50 to 60 parts of organic silicon solvent, 80 to 100 parts of ethanol water solution, 10 to 15 parts of polyurethane particles and 10 to 15 parts of nano silicon dioxide. The drilling fluid provided by the invention can prevent the drilling fluid or filtrate thereof from entering fine and micro-nano cracks of a shale well section, so that the influence of hydration or capillary force on a shale stratum is reduced, and the well wall stability problem in shale drilling can be fundamentally solved.

Drilling fluid compositions may include a weighting agent, a nitrite-containing compound, and an ammonium-containing compound, where the nitrite-containing compound and the ammonium-containing compound may be encapsulated together in copolymer micro-particles forming encapsulated thermochemical compounds, and where at least one property selected from the group consisting of the density, the plastic viscosity, the yield point, the gel strength, and the pH, of the drilling fluid composition may be substantially similar to the at least one property of a comparable drilling fluid composition devoid of the encapsulated thermochemical compounds. Methods for reducing a filter cake from a wellbore surface in a subterranean formation are also provided. The methods may include introducing into the wellbore the drilling fluid compositions, allowing the drilling fluid composition to reach a temperature in the wellbore sufficient for the encapsulated thermochemical compounds to react, where the reaction of the encapsulated thermochemical compounds generates heat and nitrogen gas.

The utility model belongs to the technical field of barite processing, and particularly relates to a repeatable barite pulverizer device which comprises symmetrically arranged supporting frames, the tops of the symmetrically arranged supporting frames are fixedly connected with a first mounting seat, and the top of the first mounting seat is fixedly connected with a polishing base. A second mounting seat is obliquely arranged above the first mounting seat, a polishing plate is embedded in the bottom of the second mounting seat, and a plurality of first polishing teeth are fixedly connected to the bottom of the polishing plate; in the polishing process, the barite is in contact with the polishing surface for polishing in the process of polishing the barite from large volume to small volume, so that the barite can be repeatedly polished in different volume states, and meanwhile, when the barite is simultaneously polished in batches, the polishing efficiency is greatly improved. And the adverse effect on the barite in the polishing process caused by the fact that small-size barite cannot be in good contact with the polishing surface for polishing due to the volume difference of the barite is reduced.

The application relates to the technical field of barite ore processing, and discloses a barite ore grinding and processing device and method, which comprises a screening cylinder and a grinding mechanism above the screening cylinder, a fixing frame is arranged between the screening cylinder and the grinding mechanism, a screening disc is rotationally connected to the inner wall of the screening cylinder, a screening rotating mechanism is arranged at the bottom of the screening cylinder, the screening rotating mechanism can make the screening disc rotate at high speed, slanted discharging cylinders are arranged on the two sides of the upper portion of the screening disc, one end of each of the discharging cylinders is fixedly connected with the inner wall of the screening cylinder, and the other end of each of the discharging cylinders is fixedly connected with a slanted grinding cylinder. The barite ore can be ground into powder, the powder can keep dynamic movement in the screening process, powder gathering can be effectively prevented, the screening efficiency is obviously improved, unqualified powder screened out can be automatically returned for secondary grinding, a closed loop is formed, and the overall working efficiency is greatly improved.

The invention discloses a high-temperature-resistant reversible emulsion drilling fluid and a preparation method thereof.The high-temperature-resistant reversible emulsion drilling fluid is prepared from, by weight, 30-60 parts of a water phase, 50-70 parts of an oil phase, 3-8 parts of a reversible emulsifier, 0-6 parts of organic soil, 0-5 parts of a wetting agent, 0-5 parts of a filtrate reducer, 0-3 parts of calcium oxide and 0-1800 parts of barite, the general formula of the reversible emulsifier is R-CONH (CH2) aNHb (CH2) c (CH3) d, wherein R is long-chain fatty acid with a plurality of methyl branched chains, and a-d are the number of groups. The reversible emulsifier can be utilized to make up the disadvantages of the traditional oil-based drilling fluid in a mud cake removal stage, and compared with the existing drilling fluid, the oil-based drilling fluid has the advantages of higher temperature resistance and lower filter loss, and can adapt to a wider temperature range.

This invention discloses a fissure grouting material, its preparation method, and its application, belonging to the technical field of radiation protection engineering materials. By mass, its raw materials include: 45-60 parts barite sand, 25-35 parts sulfoaluminate cement, 8-20 parts borax, 2-5 parts boron carbide powder, 1-5 parts nano-gadolinium oxide, 5-15 parts lithium slag powder, 3-8 parts barium sulfate whiskers, 3-8 parts polymer emulsion, 0.5-1.5 parts water-reducing agent, 0.1-0.5 parts stabilizer, and 18-25 parts water. This invention provides high-density gamma-ray shielding through barite sand, achieves all-round neutron protection through a quaternary composite neutron absorption system, enhances the material's toughness and shielding effect through barium sulfate whiskers, and ensures high fluidity and interfacial bonding strength of the grout through the polymer emulsion. This material is particularly suitable for sealing and shielding fissures in the surrounding rock of radioactive tunnels, possessing advantages such as excellent shielding effectiveness, good construction performance, high volume stability, and long-term durability.

The application relates to a separating device for barite powder purification, which comprises a reaction device and fixing feet, the lower end of the reaction device is uniformly fixedly installed with the fixing feet, the power of the motor is turned on, under the rotation of the motor, the stirring mechanism and the material uniformizing mechanism are synchronously rotated, the concentrated sulfuric acid is stirred through the rotation of the stirring mechanism, the barite powder can be intermittently dropped from the storage part through the rotation of the material uniformizing mechanism, is uniformly dispersed through the material uniformizing mechanism, and finally the barite powder is uniformly scattered to the surface of the concentrated sulfuric acid liquid; the concentrated sulfuric acid and the barite powder are fully mixed through the continuous stirring of the stirring mechanism; the impurities in the barite powder can fully react with the concentrated sulfuric acid through the material dropping and stirring, the phenomenon that the barite powder is lumped when being added at one time is avoided, the mixing of the barite powder and the concentrated sulfuric acid is more uniform through the cooperation of the stirring mechanism and the material uniformizing mechanism, and the reaction is more sufficient.

The invention discloses a beneficiation method for recovering barite from tailings, and belongs to the technical field of mineral processing. According to the method, through the technological process of magnetic separation and gravity concentration pre-enrichment, flotation concentration and roasting acid leaching quality improvement, heavy magnetic suspension physical beneficiation, high-temperature roasting and chemical leaching are organically combined, meanwhile, a shaking table technology is optimized, ore grinding is conducted through a stirring mill twice, and BaSO4 grade gt is prepared from low-grade tailings; and 98% of barite concentrate. The technological process provided by the invention is reasonable in structure, high in separation efficiency, small in environmental pollution and easy to realize industrial production.

The invention discloses a production process of high-dispersion barite powder for oil and gas exploitation, and relates to the technical field of grinding processing devices, in particular to the production process of the high-dispersion barite powder for oil and gas exploitation. A plurality of filter plates capable of promoting materials to sequentially slide on the shell are rotationally arranged in the shell, and a rectangular communicating pipe is fixedly connected to the inner bottom surface of the shell. Through the arrangement of the shell, the feeding port, the filter plate, the water pump, the first communicating pipe, a second cavity, a first cavity, a first communicating port, a rectangular communicating pipe, a filter screen, a scraping plate and a deep backflushing mechanism, the effect of comprehensively cleaning barite can be achieved, the barite enters from the feeding port and naturally turns over when sliding down from the filter plate, and therefore the barite can be thoroughly cleaned. Water flow driven by a water pump is sprayed out from the first communicating opening, multi-surface flushing is achieved, and impurities in the grooves can be removed in a targeted mode through pulse type water flow.

This invention discloses a high-temperature resistant, high-density water-based drilling fluid for ultra-deep wells and its preparation method, belonging to the field of oil and gas drilling technology. The drilling fluid is composed of the following components in parts by weight: 100 parts water, 2-5 parts high-temperature resistant modified clay, 150-280 parts composite weighting agent, 8-15 parts high-temperature resistant polymer filtration loss reducer, 3-8 parts core-shell type high-temperature resistant flow modifier, 4-10 parts nano-composite plugging agent, and 2-5 parts high-temperature stabilizer. This invention effectively solves the technical problems of rheological runaway, increased filtration loss, and barite sedimentation in ultra-deep well high-density water-based drilling fluids under high-temperature conditions above 220℃ by utilizing the high-temperature expansion-disintegration mechanism of the core-shell type flow modifier, nano- to micron-level multi-stage plugging, and the close packing of spherical and irregular weighting materials. It exhibits temperature resistance up to 220℃ and a density of 2.80 g / cm³. 3 It has the advantages of low filtration loss under high temperature and high pressure and good sedimentation stability.

Drilling fluid compositions may include a weighting agent, a nitrite-containing compound, and an ammonium-containing compound, where the nitrite-containing compound and the ammonium-containing compound may be encapsulated together in copolymer micro-particles forming encapsulated thermochemical compounds, and where at least one property selected from the group consisting of the density, the plastic viscosity, the yield point, the gel strength, and the pH, of the drilling fluid composition may be substantially similar to the at least one property of a comparable drilling fluid composition devoid of the encapsulated thermochemical compounds. Methods for reducing a filter cake from a wellbore surface in a subterranean formation are also provided. The methods may include introducing into the wellbore the drilling fluid compositions, allowing the drilling fluid composition to reach a temperature in the wellbore sufficient for the encapsulated thermochemical compounds to react, where the reaction of the encapsulated thermochemical compounds generates heat and nitrogen gas.

The utility model relates to the technical field of barite powder detection, in particular to a barite powder detection recorder device which comprises a bottom plate and further comprises vertical plates fixed to the two sides of the top of the bottom plate, supporting plates are arranged in the vertical plates, and alcohol lamps are arranged at the tops of the supporting plates; the first motor is arranged on the right side of the right vertical plate, an output shaft of the first motor is in bolted connection with a two-way screw rod, the other end of the two-way screw rod is rotationally connected with one side of the vertical plate, the two sides of the surface of the two-way screw rod are in threaded connection with movable blocks, and supporting rods are hinged between the front side and the rear side of each movable block and the bottom of the corresponding supporting plate; the fixed plate is fixed to the top of the vertical plate, a movable disc is movably connected to the interior of the fixed plate, a limiting disc is fixedly connected to the bottom of the movable disc, and the surface of the limiting disc is movably connected with the inner wall of the fixed plate; according to the utility model, the crucible can be driven to swing back and forth and left and right in a reciprocating manner, so that the interior of the crucible can be conveniently and uniformly heated.

The utility model discloses a barite powder crushing device convenient to feed, and relates to the technical field of barite powder processing, in particular to the barite powder crushing device convenient to feed, which comprises a frame body, a processing mechanism is fixed at the middle end in the frame body, and a first bracket is fixed at the lower end in the frame body; a processing mechanism is arranged on the frame body and used for processing barite powder, the processing mechanism comprises a feeding assembly and a discharging assembly, the feeding assembly comprises a support fixed to the upper end of the frame body, a trough pivoted to the upper end of the support, connecting frames pivoted to the two ends of the trough and a baffle fixed between the connecting frames at the two ends, and the other ends of the connecting frames are pivoted to supporting frames; the lower end of the support frame is pivoted with the bracket; materials can be conveniently fed and weighed through the feeding assembly, weight information of the materials is obtained, the adding amount of the materials is accurately controlled, barite powder is separated according to different particle size levels through the screening assembly, and powder products meeting the specific particle size requirement are obtained.

The invention belongs to the field of mineral flotation, and particularly discloses a collecting agent, a flotation reagent and a method for barite flotation, the method for barite flotation comprises the steps that to-be-selected minerals containing barite and the flotation reagent are mixed for flotation, barite concentrate is obtained, the flotation reagent contains the collecting agent, and the flotation reagent contains the collecting agent. The collecting agent comprises a collecting agent in the formula 1 (# imgabs0 #). The formula 1 is adopted as the barite collecting agent, so that the collecting capacity and selectivity of the barite can be improved, and particularly, the low-temperature collecting capacity and selectivity of the barite can be improved.

This application provides a mineral processing method for recovering rare earth elements, fluorite, and barite from carbonate rare earth ores, belonging to the field of comprehensive mineral resource utilization technology. This application utilizes a process flow involving mixed flotation of fluorite-rare earth elements and barite, flotation of fluorite-partially rare earth elements and barite, strong magnetic gravity separation of fluorite-remaining rare earth elements, and strong magnetic gravity separation of a small portion of rare earth elements and barite. This not only efficiently recovers rare earth elements, fluorite, and barite, avoiding the waste of associated resources, but also simplifies the operation process, makes the process more stable, and significantly reduces mineral processing costs.

The invention relates to the decontamination of radiation-contaminated lands with clay and loose soil, such as agricultural lands, as well as abandoned test sites, such as the Semipalatinsk test site and uranium quarries. In the method for decontaminating radioactively contaminated lands, which includes the introduction of a reagent, according to the invention, the area of ​​the land to be treated is filled with a 5-7 cm thick layer of KB3 grade barite concentrate containing at least 90% barium sulfate, or finely crushed barite-lead ore containing 70% barium sulfate and up to 1% lead sulfate, Then the land is ploughed using a heavy eight-body plow to a depth of at least 300 mm, turning over the soil layer and dumping it in an inverted position for the complete burial of the radioactively contaminated mass, after which the land is harrowed and reclaimed with the sowing of grass seeds. The developed method for decontaminating radioactively contaminated lands makes it possible to decontaminate lands over a large area and eliminates the need to extract fragments containing adsorbed radionuclides from the soil.

The utility model relates to the technical field of vibrating feeders, and discloses a vibrating feeder with a baffle, which comprises a vibrating feeder frame body, a vibrating motor is arranged on the left surface of the vibrating feeder frame body, and a mounting plate is fixedly mounted on the lower surface of the vibrating feeder frame body. Mounting boxes are fixedly mounted at the left end and the right end of the upper surface of the mounting plate, the right surfaces of the two mounting boxes are open, the limiting mechanism is arranged on the vibration feeding rack body, and the driving motor rotates to drive the two L-shaped connecting plates to move up and down, so that the T-shaped baffle moves synchronously, the T-shaped baffle is adjusted, and the vibration feeding efficiency is improved. According to the vibrating feeder, the T-shaped baffle is arranged on the vibrating feeder frame body, large barite powder is blocked by the T-shaped baffle, small barite powder mixed with the large barite powder leaves the interior of the vibrating feeder frame body through the lower portion of the T-shaped baffle and the rectangular grooves, the barite powder is finely graded, and therefore the working efficiency of the vibrating feeder is improved.