194 results about "Uranium mining" patented technology

The invention discloses an environment-friendly water-holding coal and uranium coordinated mining system. The environment-friendly water-holding coal and uranium coordinated mining system comprises a freezing mechanism, a pumping and injecting mechanism, a water storage mechanism and a mining supporting mechanism. The freezing mechanism is provided with freezing shafts. The pumping and injecting mechanism is provided with fluid injecting wells and a fluid pumping well. The water storage mechanism is provided with an underground reservoir, a security coal pillar and advance water discharge pipes. The mining supporting mechanism is provided with a road header, a coal mining machine, a scraper conveyor and a hydraulic support. The freezing shafts in the freezing mechanism conducts freezing on an aquifer on the periphery of the pumping and injecting mechanism with the pumping and injecting mechanism as the radius; the pumping and injecting mechanism conducts uranium mining by an in-situ leaching technology; the mining supporting mechanism conducts stoping on a coal seam; and the water storage mechanism stores and purifies water in the aquifer of a broken roof. Finally, under rational cooperation of the four mechanisms, coal and uranium coordinated mining is realized, underground water is recovered and purified at the same time, and the purpose of environment-friendly water-holding multi-resource coordinated mining is achieved.

The invention relates to a method for in-situ leaching of uranium by low concentration sulfuric acid and oxygen. In-situ leaching of metal uranium from ore beds relates to a process of recovering uranium from uranium ore deposits with non-uniformly distributed carbonate content. The method includes groundwater chemical composition analysis, oxygen injection and oxidation of ore bed, preparation of leaching solution, leaching of metal uranium by leaching solution, leaching maintaining, resin adsorption and other steps. The method can be applied to uranium ore deposits with non-uniformly distributed carbonate content to effectively control chemical clogging and improve the leaching efficiency of in-situ uranium mining. Compared with conventional acidic in-situ leaching of uranium, the method alleviates pollution to mining area groundwater environment. Effects of the leaching process by low concentration sulfuric acid and oxygen show that the method is an effective process for in-situ leaching of uranium.

The present invention relates to a resonant vacuum arc discharge apparatus for producing nuclear fusion. A resonant high-frequency high-voltage alternating current (AC) power supply is used to efficiently power a fusion tube normally containing deuterium, tritium and/or helium-3 vapor. Metals that can hold large amounts of hydrogen isotopes such as palladium and titanium can be used to increase the target density. The nuclear fusion device can be used for energy production, well logging, uranium mining, neutron activation analysis, isotope production or other applications that require a neutron source.

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 provides an acid in-situ leaching uranium mining laboratory simulation device. The acid in-situ leaching uranium mining laboratory simulation device comprises a leaching agent storage tank, a leaching column, a leaching liquid storage tank, an ion exchange column, a leaching agent preparation tank, a pump, a valve A, a valve B, a valve C, a valve D, a valve E, a valve F, a valve G and connecting pipes, wherein the leaching agent storage tank is used for storing a leaching agent; the leaching column is used for containing an ore sample and providing a site for a contact reaction between the leaching agent and ore; the leaching liquid storage tank is used for containing leaching liquid; the ion exchange column is used for containing an adsorption material of uranium; the leaching agent preparation tank is used for containing the leaching liquid generated after the uranium is adsorbed by resin; the pump is used for conveying the prepared leaching agent into the leaching agent storage tank; and the connecting pipes are used for connecting all the components. The invention further provides a test method adopting the acid in-situ leaching uranium mining laboratory simulation device. Test results of the device and the test method can provide reliable basis for in-situ test engineering leaching agent preparation and the leaching technique, the risk that according to an in-situ test leaching system, an ore bed is blocked due to accumulation and sedimentation of impurity ions is reduced, and the prevention level is improved.

The invention discloses a coal and uranium coordinated mining perspective physical simulation device and application method. The coal and uranium coordinated mining perspective physical simulation device is provided with a coal mining mechanism, a uranium mining mechanism and a observing mechanism, wherein the coal mining mechanism is provided with an organic glass box, a front panel, a rear panel, a bottom panel, a top panel, a left panel, a right panel, a strip-shaped water bag, a transporting pipe, a valve, a beaker, transparent soil, a press machine pressing head and small holes; the uranium mining mechanism is provided with positive pressure pumps, negative pressure pumps, a tracer agent, a liquid storing tank, conduits, an electric wire, a liquid injecting hole, a liquid pumping holeand a centralized control table; and the observing mechanism is provided with an industrial camera and a line laser generator. According to the coal and uranium coordinated mining perspective physical simulation device and application method, the volume of the strip-shaped water bag is adjusted to simulate coal seam mining, the positive pressure pumps are adopted to internally inject the tracer agent into the transparent soil to simulate uranium mine in-situ leaching mining, the mechanisms are matched closely, a multi-field coupling evolution law of coal and uranium coordinated mining is obtained, a coal and uranium coordinated mining scheme is optimized, and the recovery rate and economic benefits of co-associated resources are improved.

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 uranium mining and metallurgy, and relates to a pretreatment method for mud uranium ores, in particular to a pretreatment method of mud uranium ores rich in gypsum and carbonate minerals. According to the pretreatment method for the mud uranium ores, firstly coarse-grained ores rich in the gypsum are separated, and the coarse-grained ores can recycle uranium through a dump leaching method, the ores grinding cost can be saved and the reagent consumption when fine-grained ores are leached through a alkaline process can be reduced. The fine-grained ores rich in the carbonate minerals are divided into two parts of high-carbonated uranium ores and low-carbonated uranium ores through a flotation method; the uranium can be recycled through subtractive leaching and acid leaching in the follow-up leaching, the reagent consumption can be saved, and the leaching rate is improved.

The invention provides an optimization and recombination method for a well network of in-situ leaching uranium mining. The method comprises the steps that when the uranium concentration of leachate of a certain leaching mining units of a well site mining area is 3-10 mg/L, or the leaching rate reaches 60%-75%, the positions of liquid extracting wells and liquid injecting wells are adjusted; the injecting wells at the boundary of the mining area are not adjusted to be extracting wells, and it is guaranteed that wells on the periphery of the mining area are all the injecting wells; when a well type is a quincunx type, the adjacent extracting wells are connected into straight lines, the adjacent injecting wells are connected into straight lines, the original extracting wells are changed into injecting wells, the original injecting wells are changed into extracting wells, and it is guaranteed that the well type after adjusting is still the quincunx type; and when the well type is a seven-point type, the extracting wells are connected into lines, the two injecting wells are located between every two extracting wells, translation is conducted in the same direction of the straight lines, after translation, the original extraction wells are changed into injecting wells, the adjacent injecting wells along the straight lines are changed into extracting wells, and it is guaranteed that the well type after adjusting is still the seven-point type. The optimization and recombination method is a secondary stoping method improving the leaching rate of the uranium resource and solves the problem that through a fixed well type, leaching dead angels exist at the time of leaching, so that the resource leaching rate is low.

A process for biological restoration of ground water in a mineralized sandstone formation using a nutrient source. The process is used in conjunction with mining uranium using in-situ pump and treat technology. The restoration of the ground water is designed to meet federal and state regulations. The process includes pumping the contaminated ground water from the mineralized sandstone formation using production wells to the ground surface. The ground water is then circulated through at least one ion exchange column. The ion exchange column is used to capture any residual uranium remaining in solution. The treated ground water then flows from the ion exchange column through at least one reverse osmosus unit. The reverse osmosus unit is designed to help decrease any remaining dissolved solids in solution, such as sodium and chloride. From the reverse osmosus unit, the ground water is circulated through at least one de-carbonation column. The de-carbonation column is used to remove residual carbon dioxide in the ground water. Upon exiting the de-carbonation column, a nutrient source is introduced into the ground water for stimulating the indigenous bacteria in the mineralized sandstone formation. The ground water is now pumped back into the ground where it is reintroduced into the sandstone formation.

The invention belongs to the technical field of uranium-coal paragenesis mining, and particularly relates to a method for preventing a decline of an underground water level in uranium mining through in-situ leaching for uranium-coal co-mining. According to the technical scheme, a hydraulic barrier is built on the periphery of a uranium mining district through distribution of water injection drill holes, and when underground water is drained for a coal mine, the decline of the underground water level of the uranium mining district is prevented. The method for preventing the decline of the underground water level in uranium mining through in-situ leaching has the advantages that it can be guaranteed that two resources are mined at non-overlapped districts at the same time, the two resources can be fully utilized, the economic benefit of enterprises is improved, and the recovery of the geological resource is guaranteed.

The invention belongs to the technical field of mine production for in-situ leaching uranium mining, and particularly relates to a method for repairing a damaged drilled hole for in-situ leaching uranium mining through a plurality of layers of expanding materials. The method sequentially includes the following steps that whether a well pipe (1) or a filter is damaged is initially judged; under the condition that the well pipe (1) is damaged, the cracked position of the well pipe (1) is determined through well logging, a plastic smaller than the well pipe (1) in inner diameter serves as a casing pipe (3), the expanding materials (2) are wound around the casing pipe (3), the casing pipe (3) is put downwards to align with the cracked position of the well pipe (1), and the expanding materials (2) expand and squeeze the inner wall of the well pipe (1) to form a new channel; under the condition that the filter is damaged, the drilled hole is washed to be clean, the expanding materials (2) are wound around a built-in filter smaller than the original filter in outer diameter, the built-in filter is put downwards to be close to the original filter (4), the expanding materials (2) expand when making contact with water and squeeze the well pipe (1), and a new filter is formed in the drilled hole.

The invention provides a bicarbonate-type groundwater plus O2 leaching uranium mining process, which adopts an in-situ leaching method to mine uranium ore layers in a bicarbonate-type aquifer. In this process, O2 is directly mixed with the leaching solution and then injected into the ground. After adding oxygen to the groundwater containing HCO3-, the uranium in the ore is oxidized and leached to form [UO2(CO3)3]4- or [UO2(CO3)2]2 -The leaching solution of complex anions is then extracted from the surface and sent to the hydrometallurgy process for processing. The invention adds O2 as an oxidant and utilizes HCO3- ions in bicarbonate groundwater as a leaching agent for uranium, which can effectively control the occurrence of chemical blockage and improve the leaching rate of uranium in situ leaching. Compared with the traditional acid leaching and alkali leaching processes, the process cost is reduced and the mining environment is better protected. From the test results, the concentration of uranium leached by adding O2 in bicarbonate-type groundwater can reach 30mg/L, which meets the requirements of industrial production.

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 discloses a uranium ore well logging quantitative method combined with instantaneous neutron time spectrum to correct natural gamma total amount in the field of uranium exploration and in-situ leaching uranium mining. Specifically, the uranium ore well logging quantitative method comprises the steps that for uranium-bearing rock ore beds in a borehole, two types of well logging datawhich are natural gamma total well logging and instantaneous neutron time spectrum well logging are used for constructing a uranium ore quantitative interpretation method with uranium-radium-radon balance correction, wherein the uranium ore quantitative interpretation method is based on the natural gamma total well logging; and well logging data of standard model wells are used for contrasting a calculating method of scale parameters such as conversion coefficient and background response required for uranium ore quantification. Compared with the uranium ore quantitative method of single instantaneous neutron time spectrum well logging or natural gamma total amount well logging, the uranium ore well logging quantitative method does not need core sampling and chemical analysis methods, so that the balance coefficient of uranium-radium-radon can be calculated, the well logging speed further be greatly improved, the advantages of improving drilling efficiency, reducing exploration cost andshortening uranium quantitative period are further provided, and the field analysis of uranium ore quantification by computer programming is realized.

The invention relates to the technical field of in-situ leaching uranium mining, in particular to a method for improving the leaching rate of in-situ leaching uranium mining using ultrasonic waves. The method comprises the following steps that one leaching unit including one pumping hole and four injection holes in a in-situ leaching uranium mining field is selected, four sets of ultrasonic energy gathering devices are put into the four injection holes, the putting depth is the distance to the middle position of an ore bed; when an target leaching unit is in the normal pumping injection operation, the four sets of ultrasonic generators are opened at the same time, the ultrasonic waves at the same time act on the target ore bed through the ultrasonic energy gathering devices in the injection holes; the operation cycle of the ultrasonic energy gathering devices and the ultrasonic generators is 2-6 months, the daily available machine time is not less than 2-8 hours, leaching liquid flow and target element concentration are measured and recorded, and the changes of ore bed permeability coefficient and leaching rates are calculated. According to the method for improving the leaching rate of the in-situ leaching uranium mining using the ultrasonic waves, the uniform and effective contact between leaching agents and ores is realized, the chemical reaction rate is accelerated, the purpose of increasing the leaching liquid concentration and the leaching rate is achieved, the mining speed is accelerated and the recovery rate is improved.

The invention relates to a reagent-free in-situ leaching uranium mining technological process which is additionally provided with a set of ion interchange unit consisting of an ion exchanger, a blast blower, a sand filtering tank, a regenerant tank and a waste liquid pool before a medium entering an absorption tower on the basis of the conventional reagent-free in-situ leaching uranium mining technological process. Leaching solution containing an oxidizing agent is injected into an ore bed through an injection hole so that the uranium in the ore bed is changed into the form of uranyl ions or other complex icons which are dissolved in leaching solution groundwater, then leaching solution containing uranium components is extracted to ground through an extracting hole, the leaching solution is injected back to the ore bed for recycling after carrying out sedimentation, icon exchange treatment and adsorption, and a uranate product is obtained after carrying out the procedures of analyzing, sedimentation, filter pressing and the like to saturated resin containing uranium. The method has the advantages of little investment, mature operative technique, obvious anti-blocking effect and the like. The utilizing of the process method can guarantee the continuous and stable running of uranium mining wells and a production system, and improve the production time efficiency and the product output.

The invention provides a modular device for a centralized control room of ground leaching uranium mining areas. The modular device comprises two container modules. The two container modules comprise the liquid injecting control module and the power distribution and liquid pumping control module correspondingly. A method comprises the steps that oxygen is mixed into a liquid injecting main pipe through an oxygen main pipe, the liquid injecting main pipe injects a dissolving and leaching liquid with the oxygen into each row of liquid injecting branch pipes, and then the dissolving and leaching liquid with the oxygen is injected into liquid injecting wells of a plurality of ground leaching uranium mining areas through a plurality of liquid injecting branches on each row of liquid injecting branch pipes and injected into an underground seam; the dissolving and leaching liquid injected into the underground seam and an ore body are subjected to oxidation reaction, and an ore-bearing leachingliquid is formed; a leaching fluid in a liquid pumping well is pumped into a plurality of liquid pumping branches on each row of liquid pumping branch pipes, and then all rows of liquid pumping branch pipes are aggregated and enter into a liquid pumping main pipe. The modular device can realize standardization construction of a factory, construction investment is reduced, the construction periodis shortened, and construction waste is reduced, thus damage to the natural environment is reduced, and the modular device has the advantage of green environmental protection.

The invention relates to a plant uranium mining method, which is a method achieved as follows: high-biomass uranium-enriched plants are used for enriching uranium in uranium tailings, tailing residues, uranium waste rock, low-grade uranium mine, and uranium-mineralized soil which are stacked on the ground surface to the overground parts of the plants, the uranium is intensively harvested and driedafter being enriched to a certain extent, and then uranium-containing biologic minerals are formed after the uranium is incinerated at high temperature. The method comprises the following concrete steps: (1) screening the high-biomass uranium-enriched plants; (2) sterilizing seeds; (3) potting, transplanting seeding to uranium-containing substrates; (4) intensively harvesting and drying the uranium after the uranium is enriched to a certain extent in plant bodies; and (5) incinerating the harvested plant bodies at high temperature, wherein ash component generated by incineration are the uranium-containing biologic minerals. The invention has the advantages of convenient material obtainment, low cost, simple processing step, favorable environment, energy saving, no destruction and the like.

The invention belongs to the technical field of in-situ leaching uranium mining and particularly relates to a replaceable filter for in-situ leaching uranium mining drilling to solve the cleaning and replacing problems of a well completion filter and a latter filter in an in-situ leaching drilling construction process. The replaceable filter is characterized by comprising a righting head, an upper sand-closed retaining rubber drum, an upper adjustment pipe hoop, a lower sand-closed retaining rubber drum, a lower adjustment pipe hoop, a connecting pipe, an upper reducing pipe hoop, a filtering pipe, a filter annular skeleton, a lower reducing pipe hoop, a suspension clamp ring, a sand setting pipe and an anchoring head. The replaceable filter has the characteristic of convenient replacement, and the filter can be rapidly and conveniently pulled out from a drilling hole to be cleaned or repaired or directly replaced when needing to be cleaned or failing so that the in-situ leaching drilling hole can keep a normal working state at any time. The replaceable filter is already applied to scientific research and production work of the Tianshan Uranium Industry Company, the failure rate of the in-situ leaching drilling hole is greatly decreased, and carrying-out of in-situ leaching uranium mining work is facilitated.

The invention discloses an in-situ leaching uranium mine high-power ultrasonic blockage removing and permeability increasing device and method, and relates to the technical field of in-situ leaching uranium mining. The main structure of the device comprises an ultrasonic well washing vehicle, an ultrasonic special cable, a wellhead support, a pulley and an ultrasonic transducer, wherein the wellhead support is arranged at the wellhead of a liquid pumping and injecting well, the pulley is arranged on the wellhead support, one end of the ultrasonic special cable is arranged on the ultrasonic well washing vehicle, and the other end of the ultrasonic special cable bypasses the pulley and then extends into the liquid pumping and injecting well; and the ultrasonic transducer is arranged at the end part of the other end of the special ultrasonic cable. Scales on a filter are oscillated and removed through the ultrasonic transducer, and then compressed air is injected through the air compressor to discharge the scales and water at the same time, so that the scales on the filter and near wellbore zones are safely and effectively removed, the well drilling liquid pumping and injecting capacity is effectively recovered, and influence on the environment is small.

The invention relates to a pipe simulation in-situ bioremediation device. The device comprises an in-situ bioremediation test tube, an ex-situ treatment effluent adjusting tank connected with the in-situ bioremediation test tube and a high-position carbon source supply tank, the in-situ bioremediation test tube is internally and uniformly filled with simulated ore-bearing and water-bearing stratumore, and the two ends of the in-situ bioremediation test tube are blocked and provided with a plurality of sampling monitoring openings; the in-situ bioremediation method of the pipe simulation in-situ bioremediation device comprises the steps: S1, an in-situ remediation simulation test and S2, simulation research of a seepage field and a water chemical field in the in-situ remediation process. In-situ bioremediation is simulated through the pipe, technical support is provided for actual in-situ bioremediation of the in-situ leaching uranium mining underground water, in-situ bioremediation processing of the ore-bearing and water-bearing stratum underground water in the decommissioned mining area of in-situ leaching uranium mining through the industrial acid method is achieved, the economic cost is saved, and the in-situ bioremediation efficiency is also improved.

The invention relates to the technical field of uranium mining and metallurgy, and particularly discloses an ion exchange eluting column for a compact moving bed. The eluting column comprises an exchange column, a resin inlet, a liquid inlet, an exhaust port, a plurality of liquid outlet devices and a resin outlet; the resin inlet and the liquid inlet are formed in the top end of an upper sealing head arranged at the upper end of the exchange column; the resin outlet is formed in the center of a lower sealing head arranged at the lower end of the exchange column, and meanwhile the liquid outlet devices are arranged on the lower sealing head; a compact resin bed layer is arranged in the exchange column; the resin inlet is of a detachable flange cylinder structure; and the exhaust port is of a detachable pipe connecting flange assembly structure. According to the eluting column, the flow and the concentration are both suitable for the eluting column under the working pressure of 0.6 MPa, the using amount of eluting liquid is low, material liquid is distributed uniformly, deflected flowing and channeling are prevented, the space utilization rate of resin is high, the system using resin amount is low, resin eluting and converting achieved through a fixed bed and resin feeding and discharging achieved through the moving bed alternate freely, and the eluting liquid is qualified.