160 results about "Uranium deposit" patented technology

The invention relates to a geological survey method and particularly discloses a recognizing method for a concealed mineralization tectonic zone of granite type uranium deposit. The recognizing method comprises the first step of manufacturing a large-scale remote sensing structural interpretation map, the second step of selecting a structural alteration zone A beneficial to mineralization is selected on the large-scale remote sensing structural interpretation map, the third step of extracting chemical detection information to obtain a structural alteration zone B beneficial to mineralization, the fourth step of extracting physical detection information to obtain a structural alteration zone C beneficial to mineralization, and the fifth step of determining a preferred mineralization target region. As geology, physics, chemistry and remote sensing methods are combined, the deep mineralization beneficial section of uranium can be recognized accurately, and a basis is provided for uranium prospecting and preference prediction.

The invention discloses a method for explosion and leakage increase of a low permeability sandstone uranium deposit, which includes steps as follows: A. blast holes are drilled through the overburden, the top rock of occurrence terrane to the proper position of the occurrence terrane from surface. An underreamer is used to locally ream the blast holes at the occurrence terrane to meet charging requirement; B. blasting cartridges are arranged in the blast holes in an uncoupling way; the detonator is waterproof; uncoupling charge for explosion comprises radial uncoupling charge and axial uncoupling charge; C. after the blasting cartridges are arranged properly, hole seal measures shall be taken to build up the blast holes; D. the blasting cartridges are initiated through short delay blasting which comprises short delay blasting inside the blast holes and short delay blasting between the blast holes. The recovery factor and the yield per unit of in-situ Uranium leaching are improved; the uranium deposit resource of low permeability sandstone type is used completely, thus alleviating the shortages of uranium resources.

The invention belongs to the technical field of sandstone-type uranium mineralization potential evaluation and collective geological prospecting in a basin, and specifically relates to a method for defining a favorable area of sandstone-type uranium mineralization under a strong construction background. The method comprises the following steps: 1, selecting a target layer in a work area; 2, calculating a lifting denudation quantity of the target layer; 3, constructing a preferable prediction theme; 4, predicting a weight assignment value of the theme; 5, calculating and predicting the unit ore-forming favorability; 6, defining and layering the favorable area of uranium mineralization. The method carries out the qualitative and quantitative evaluation of the most key construction parameters, highlights the contribution of a stratum denudation quantity caused by the construction effect to a uranium ore deposit, and preliminarily selects the evaluation region.

The invention belongs to the technical field of sandstone-type uranium deposit exploration, and particularly discloses a sand body reorganization method in sandstone-type uranium deposit exploration. The method includes the following steps that (1) pure wave data of a seismic processing section are collected; (2) logging data of a drilling well nearby the seismic section are collected, and the abnormal contrast value of density and the abnormal contrast value of sound waves are calculated; (3) moving average processing is conducted on density data and sound wave data; (4) a seismic inversion calculation initial model is established through the density data, the sound wave data and the logging data after moving average processing in the step (3); (5) inversion calculation is carried out on wave impedance data of the seismic section through an inversion method based on the model, and the wave impedance data of the seismic section are acquired; (6) sand bodies in a sandstone-type uranium deposit area are determined according to the wave impedance data acquired in the step (5). By means of the sand body reorganization method in sandstone-type uranium deposit exploration, the development condition and the distribution feature of the sand bodies in sandstone-type uranium deposit exploration can be recognized accurately, rapidly and economically.

The present invention belongs to the uranium geology and resource evaluation technology field, in particular to a method of positioning the uranium deposits rapidly and effectively in a hot spot active region. The method comprises the following steps of 1 determining a hot spot active region range and a geological background; 2 screening and positioning a uranium mineralization favorable area in the hot spot active region; 3 screening and positioning a key section in a favorable metallogenic region; 4 determining a uranium mineralization environment in the key section; 5 integrating the metallogenic information and predicting the mineralization; 6 drilling and verifying in the key section. A uranium deposit and ore body positioning technology of the present invention is based on a brand new hot spot uranium mineralization theory and a prediction method and combines the geology, geophysics and geochemistry features to carry out the regional mineralization prediction and positioning on the basis of fully mining the previous data, and an operation method is simple and convenient and is high in accuracy, the prediction blindness is reduced, and the evaluation time is shortened.

A improved device and process for recycling spent nuclear fuels, in particular uranium metal, that facilitates the refinement and recovery of uranium metal from spent metallic nuclear fuels. The electrorefiner device comprises two anodes in predetermined spatial relation to a cathode. The anodese have separate current and voltage controls. A much higher voltage than normal for the electrorefining process is applied to the second anode, thereby facilitating oxidization of uranium (III), U⁺, to uranium (IV), U⁺⁴. The current path from the second anode to the cathode is physically shorter than the similar current path from the second anode to the spent nuclear fuel contained in a first anode shaped as a basket. The resulting U⁺⁴ oxidizes and solubilizes rough uranium deposited on the surface of the cathode. A softer uranium metal surface is left on the cathode and is more readily removed by a scraper.

The invention belongs to the technical field of uranium deposit prospecting, and provides a sedimentary basin oil and gas strong reduction action zone sandstone type uranium deposit prospecting model establishing method which fully integrates the oil and gas reduction action, interlayer oxidation, the plane of unconformity, fracturing, sand bodies and other geological actions and geological units, discloses all the geological actions and the relationship thereof and determines a prospecting target for the sedimentary basin oil and gas strong reduction action zone. The method comprises the following steps that step one, a target layer is determined; step two, the oil and gas reduction action distribution range is delimitated; step three, time of the plane of unconformity is determined; step four, time Th of the oil and gas reduction action is determined; step five, the uranium mineralization type is determined; and step six, the prospecting model is established.

The invention relates to a technique for reagent-free in situ leaching uranium mining from a sandstone type uranium deposit, which comprises the following steps: performing preoxidation on ore beds by injecting air; injecting industrial oxygen into the ore beds in the processes of extracting and liquid charging; and forming hexavalent uranium into a stable soluble complex in bicarbonate type ground water. The technique achieves the oxidation of the metallic uranium in the ore beds under the condition of not introducing chemical reagents of acid, alkali and the like so that the water-insoluble tetravalent uranium is converted into water-soluble hexavalent uranyl ions for the convenience of performing extraction on the ground surface; besides, the technique has the advantages of stable product quality, low production cost, no pollution of an extraction-injection balanced closed cycle, easy decommissioning treatment and the like.

The invention discloses a research method suitable for characteristics of an interlayer oxidation zone of a sandstone-type uranium deposit. The research method comprises the steps of S01, establishing macro identification criteria for sandstone of each sub-zone of an interlayer oxidation zone of a target stratum in a research area; S02, acquiring samples and conducting a analytical test; S03, establishing geochemical indicators for each sub-zone of the interlayer oxidation zone according to results of the analytical test; and S04, conducting research on characteristics of each spatial sub zone of the interlayer oxidation zone according to the geochemical indicators for each sub-zone of the interlayer oxidation zone. Through research on the geochemical indicators for different sandstone in a known typical ore deposit in the research area, the invention establishes the geochemical indicators for determining oxidation sandstone, mineralization sandstone and native sandstone, and carries out promotion and application to the entire research area to find out spatial distribution characteristics of each sub-zone of the interlayer oxidation zone in the research area, so that the spatial distribution characteristics of each sub-zone of the interlayer oxidation zone in the research area can be more close to the actual situation, thereby providing more useful guidance to prospecting and exploration.

The invention belongs to the technical field of uranium ore, and specifically relates to a method for testing the formation age of crystalline uranium ore; The age of uranium deposits and the role of metallogenic evolution analysis, decomposing the key elements and main ore-controlling factors of each metallogenic period from complex geological phenomena, providing ideas for uranium deposit exploration, and guiding specific ore-prospecting work to test crystal quality The method for the formation age of uranium ore; including the following steps: Step 1, field investigation and collection of uranium ore samples; Step 2, rock ore identification and electronic probe analysis on the ore samples; Step 3, using LA-ICP-MS Micro-zone dating of crystalline uranium ore; step 4, data collation, parameter calculation and mapping, and finally the formation age of uranium ore is obtained.

The invention belongs to the technical field of uranium geology research, and specifically relates to a method of selecting a target area of a sandstone-type uranium deposit based on mineralization favorability. The method includes the following steps: S1, determining a favorable environment for uranium mineralization; S2, determining uranium mineralization prediction factors; S3, assigning valuesto the uranium mineralization prediction factors; S4, calculating the value of uranium mineralization favorability; and S5, delineating a mineralization target area, and evaluating the potential of uranium mineralization. The steps of the method are irreversible. The potential of uranium mineralization in a region can be evaluated efficiently, quickly and objectively.

The invention belongs to geology technical field, and more specifically relates to a method for calculating mineralization relation of a clay mineral object and uranium in a sandstone type uranium deposit. A purpose of the method is a quantitative analysis of mineralization relation between the clay mineral object and uranium in the sandstone type uranium deposit. The method comprises the following steps: taking an interlayer oxidation zone, a transition zone and a reducing zone for selecting the samples for different subzones, calculating mass of three samples, uranium-containing mass and proportion; separating and purifying the clay mineral object, and calculating the mass; analyzing types, composition and property of the clay mineral object in three samples; calculating the uranium-containing mass and the uranium-containing proportion; performing an adsorption reaction experiment of the clay mineral object and uranyl nitrate to obtain the most favorable adsorption condition; researching the secondary adsorptivity of the clay mineral object in the sample to uranium under the most favorable adsorption condition; analyzing the adsorptivity difference of a typical mineral standard sample mixture and the clay mineral object in the sample, comparing the area geology background and the most favorable adsorption condition, and determining the enrichment effect of the clay mineral object to uranium.

The invention relates to an integrated blockage removal agent used for uranium deposit seams, wherein, the integrated blockage removal agent is formed by the compounding of retarded acid, corrosion inhibitor, oxidative bactericide, surfactant and water according to a certain weight percentage. The blockage removal agent is formed by the following compounding method: firstly, under normal temperature, clean water is quantitatively added in a square pool; subsequently, under the mixing condition, according to the proportion, the corrosion inhibitor, the retarded acid, the surfactant and the oxidative bactericide are added in the square pool, wherein, according to the consistency, the retarded acid consists of 1 percent of hydrofluoric acid and 5 percent of acetic acid; the dosage of the retarded acid is 35-40 percent, the dosage of the corrosion inhibitor is 0.01 percent, the dosage of the bactericide is 0.01 percent and the dosage of the surfactant is 0.05 percent; and the clean water is added to the square pool till the consistency is 100 percent. The blockage removal agent has the effects of corrosion dissolution, sterilization and mechanical impurity and bacterium body disposal, eliminates the chemical deposits generated in the seams, effectively kills the bacteria and the microorganism, has the function of anti-fouling and improving the permeability of the seams, greatly prolongs the plugging period of the seams and improves the mining efficiency.

The invention relates to a uranium well gas lifting stemming removing method used in a sandstone type uranium deposit regent-free uranium mining production process. The method comprises the steps: a polyethylene pipe is put in a uranium well, and a reverse circulation gas lifting mode is adopted to achieve the purpose of plug removing, wherein, the reverse circulation gas lifting mode is that high-pressure gas is injected in the annular space between a PVC casing and the polyethylene pipe so that the liquid surface in the annular space is lowered gradually, inside and outside differential pressure is formed outside the polyethylene pipe, the liquid in the polyethylene pipe is lifted out of the well mouth under pressure, then negative pressure is formed at the ore bed segment at the well bottom simultaneously so as to cause the fluid in a uranium ore bed to flow faster towards a well casing, and after that, stemming of gas, mechanical impurities and the like in the ore bed flow out to ground along with the high speed fluid by the polyethylene pipe. The method can be applied to the stemming removing operation of uranium deposit ore bed caused by gas and mechanical impurities; and by utilizing the technological method, good stemming removing effect is obtained, the production period of the uranium well is improved greatly and the uranium mining production cost is reduced.

The invention belongs to the technical field of isotope dating, and specifically discloses a method for determining the metallogenic age of sandstone-type uranium deposits, the steps of which include: determining the content of uranium, radium and lead and the composition of lead isotopes for a group of uranium ore samples formed simultaneously with the same origin , calculate the U-Ra balance coefficient, use the U-Ra balance coefficient to correct the U content, fit the U-Pb isochrone, and use the isochrone slope b to calculate the metallogenic age. The advantages of the present invention are: U-Ra balance coefficient correction is used to restore the uranium content in the sample to the content when no modern uranium has been moved out or brought in, and then the U-Pb isochrone is fitted, and the obtained age result is Unaffected by recent uranium migration or enrichment, a more realistic ore-forming age can be obtained.

A purpose of the present invention is to remedy defects of a research method for relation between humus and uranium metallogenesis in sandstone type uranium deposit. The invention provides a research method for relation between humus and uranium metallogenesis in sandstone type uranium deposit. The method comprises collecting an experiment sample in field, purifying humic acid (HA) and fulvic acid (FA) in a laboratory, characterizing the humic acid (HA) and the fulvic acid (FA), and carrying out a uranium metallogenesis simulation experiment. According to the invention, various stages from the field geology observation sampling to the laboratory purification simulation are encompassed, the conversion from qualitation to quantitation is achieved, the process is standardized, the reliability is high, the purification method is reasonable and feasible, and important effects are provided for deepening of the sandstone type uranium metallogenesis mechanism, and determination of the specific relation between the humus and the uranium metallogenesis effect.

Disclosed herein is a continuous electrolytic refining device for metal uranium, the device comprising a cathode section fixed to the lower side of the heat radiation plate, and having a plurality of graphite cathodes; an anode section encompassing the cathode section to face the cathode section, rotatably fixed to the lower side of the heat radiation plate, and receiving the used nuclear fuel; an electrolytic cell receiving the cathode section and the anode section and filled with electrolytes so as to sink the cathode section and the anode section; an uranium collecting section collecting metal uranium deposited on and detached from the graphite cathode in the lower side of the cathode section inside the electrolytic cell and withdrawing the collected metal uranium to the outside of the electrolytic cell; and a transition metal collecting section coupled with the lower side of the electrolytic cell to withdraw the transition metal particles released from the anode section and collected in the lower side of the electrolytic cell, in order to collect high pure uranium deposits and metal transition elements created in an electrolysis process without stopping an electrolysis process, not including a scrapping process.

The invention belongs to the technical field of geological exploration, and specifically discloses a method for locating and predicting the potential of uranium resources in the deep part of an ore field, including the following steps: step (1), research on the distribution characteristics of ore deposits; Structural features; Step (3), comparing the deep mineralization conditions of the deposit; Step (4), evaluating the mineralization potential of the deposit. The method of the present invention makes full use of the geo-physics-chemical comprehensive characteristics and technology in the ore deposit area to determine the extension and change of the ore-bearing structure in the deep part of the uranium deposit, and to delineate the favorable target area for ore prospecting.

The invention discloses an in-situ leaching uranium mining method by using mixing organic acidity as a leaching agent, which is characterized in that oxalic acid and citric acid are taken as the leaching agent, the leaching agent is injected into an ore bed by using an on-line mode addition mode, pH value of an immersion liquid is kept at 3-6, so that an organic matter for coating metal uranium can be dissolved, and leaching can be promoted; in addition, when the carbonate in the ore bed is corroded by oxalic acid and citric acid, its organic function group generates complexation with elements such as calcium, magnesium and iron in ore without deposition generation, on one hand, leaching reaction can be continuously carried out, on the other hand, penetration performance of the ore bed can be increased, and liquid injection amount of the boring is obviously increased. The method can be used in Ordos uranium deposit in-situ leaching uranium mining tests and production, liquid injection amount is obviously increased, and uranium concentration of leachate is obviously increased.

The invention relates to the technical field of sandstone-type uranium deposit exploration and particularly discloses a paleo-interlayer oxidation zone recognition method for a sandstone-type uraniumdeposit. The method comprises steps: 1, field core logging and recognition are carried out to acquire core recognition characteristics of the paleo-interlayer oxidation zone and a primary reduction zone; 2, in view of different zones, system sampling and analysis and test are carried out to obtain mineral characteristics of the paleo-interlayer oxidation zone and the primary reduction zone; and 3,through field drill core logging and sample analysis and recognition, a paleo-interlayer oxidation zone and a primary reduction zone are divided from a vertical direction and a plane, and a sandstoneuranium deposit range is acquired. The method of the invention can be widely applied to inner-zone sandstone-type uranium deposit prospecting and exploration; through the method, inner-zone sandstone-type uranium deposit prospecting and exploration are guided, huge prospecting breakthrough is acquired, the northern east of Ordos Basin is already developed into the largest uranium resource base inChina, and adequate resources are provided for China's national defense construction and nuclear power development.

The invention belongs to the technical fields of uranium prospecting and geophysical exploration, particularly to an interlayer oxidation zone sandstone type uranium deposit favorable target area space location method. The interlayer oxidation zone sandstone type uranium deposit favorable target area space location method comprises the following steps of in key working areas, determining favorable metallogenic sections through telluric electromagnetic sounding; for the favorable metallogenic sections, outlining a redox transitional zone range through high-accuracy ground magnetic survey scanning; outlining the front line of a redox zone; primarily determining a favorable metallogenic area, performing electromagnetic measurement and fine sand body identification to outline target sand bodies in a longitudinal direction; according to the outlined redox transitional zone range and the longitudinal distribution of the target sand bodies, outlining a favorable metallogenic target area. The interlayer oxidation zone sandstone type uranium deposit favorable target area space location method solves the technical problem that the prior art cannot achieve accurate space location of uranium deposit, and by combining with the redox transitional zone range and the longitudinal distribution of the target sand bodies, can achieve accurate space location of interlayer oxidation zone sandstone type uranium deposit, thereby being significant sandstone type uranium deposit prospecting.

The invention relates to a carbonaceous-siliceous-argillitic rock type uranium deposit target region optimization method based on elemental geochemical anomaly, comprising the following steps: 1) acquisition or collection of elemental geochemical data; 2) compilation of a single elemental geochemical anomaly chart; 3) ore spot projection transformation; 4) indicator element screening; 5) compilation of uranium (uranium is selected in granite-exposed areas) and ancillary indicator element geochemical anomaly charts and projection transformation; 6) judgment of abnormal forms; and 7) judgment of the level of uranium metallogenic prospect target regions. The method is suitable for multiple carbonaceous-siliceous-argillitic rock type metallogenic belts and predication areas nationwide, and has advantages of wide coverage, high effectiveness, high applicability and good accuracy. The method has clear indicator elements and has high operationality. Evaluation methodology procedures are standardized; evaluation efficiency is raised; and objectivity of research results is guaranteed.

The invention belongs to the technical field of uranium ore exploration, and concretely discloses a lithogeochemical method for identifying sodium-metasomatic uranium deposit. The method comprises thefollowing steps: 1, collecting at least five rock/ore samples with the size being 3 cm * 6 cm * 9 cm; 2, carrying out geochemical analysis on the rock/ore samples collected in step 1, wherein the collected rock/ore samples are crushed until the size is 200 meshes and the weight of every crushed rock/ore sample is more than 50 g; and 3, analyzing rock/ore geochemistry data obtained in step 2, anddetermining the rock/ore samples to be the sodium-metasomatic uranium deposit when the content of Na2O in the rock/ore samples is greater than 6% and a content ratio of Na2O to K2O is greater than 2.5in order to identify the sodium-metasomatic uranium deposit. The method is simple, quick and effective.

The invention belongs to the field of remote sensing geology, and particularly discloses a method of searching for a potential ultra-large sandstone uranium deposit based on a remote sensing image. The method is implemented by the following steps: 1, terrain modeling is carried out by utilizing DEM data, and a region with an inclined unidirectionally terrain is searched for; 2, multi-spectral remote sensing data is used for performing river channel or ancient river channel interpretation on the inclined unidirectionally region interpreted in the step 1, and a region with gathered river channels is further searched for; 3, a source region is searched for to an upstream region along the river channels; 4, lithological and alteration mapping is carried out in the source region by utilizing the multi-spectral remote sensing data, and the rock type of the source region and the area of an alteration region are determined; and 5, the source region is a region with peraluminous granite and a wide alteration range, and a region with a gathered water body in a downstream region is judged to be a forming region of the potential ultra-large sandstone uranium deposit. The method has the following beneficial effects: the evaluation work of the uranium deposit can be carried out without limitation of regions and national boundaries.

The invention discloses a rock core holder for measuring transverse permeability of a sandstone-type uranium deposit rock core. The rock core holder comprises a barrel body, a barrel body tail cover, a barrel body end cover, a water inlet tube, a water outlet tube, a water inlet valve joint, a gas outlet valve joint and a water outlet valve joint, wherein water inlet tube installation holes are respectively arranged in the barrel body tail cover and the barrel body end cover; and a water outlet tube installation hole is arranged in the barrel body end cover. A notch for clamping the rock core is arranged on the water inlet tube; one end of the water outlet tube is sealed; and the notch for clamping the rock core is arranged on the water outlet tube. The barrel body tail cover is fixed on one end of the barrel body by a bolt; the barrel body end cover is fixed on the other end of the barrel body by the bolt; the water inlet tube penetrates through the water inlet tube installation holes in the barrel body tail cover and the barrel body end cover, and then is arranged on the barrel body tail cover and the barrel body end cover; one end of the water outlet tube penetrates through the water outlet tube installation hole in the barrel body end cover and is arranged on the barrel body end cover; a water inlet joint is arranged on one end of the water inlet tube; a gas outlet joint is arranged on the other end of the water inlet tube, and a water outlet joint is arranged on one end of the water outlet tube.

The invention belongs to the technical field of sandstone type uranium mineralization potential evaluation and comprehensive prospecting in the basin, and specifically discloses a method for rapidly delineating the position of a paleo-interlayer oxidation front line in an oil gas covering area. The method includes (1) determining the paleo layer working area of the oil gas covering area and selecting a destination layer; (2) selecting n uranium deposits that are similar to the working area in the oil gas covering area in the previous step (1); (3) determining the similarity Si between the n uranium deposits and the working area in step (2); (4) determining the front line development rate Vi for the n uranium deposits in step (2); and (5) delineating the paleo oxidation front line of the working area. According to the method, the paleo-interlayer oxidation front line development position can be quickly and efficiently delineated, the prospecting efficiency is improved, and the prospecting cost is saved.