335 results about "Salt lake" patented technology

The invention discloses a method for extracting lithium from a salt lake and an extraction device. The method for extracting lithium from the salt lake provided by the invention comprises the following steps: salt lake brine is subjected to aluminum adsorbent adsorption, ultrafiltration impurity removal, multi-stage nanofiltration magnesium and boron removal, reverse osmosis concentration, ultrafiltration softening deep magnesium removal, resin magnesium and boron removal, MVR evaporation and other technological processes, and a battery-grade lithium carbonate product is obtained. According to the method, the membrane separation technology serves as a core, resin and an evaporation system serve as auxiliary materials, deep separation of magnesium and lithium in the salt lake brine is achieved, the boron removal rate and the lithium recovery rate are high, meanwhile, recycling of water resources is guaranteed, and the whole process has the advantages of being controllable, high in automation degree, low in production cost, small in pollution, high in water recovery rate and suitable for industrial production. The method can be applied to large-scale production of salt lake lithium extraction.

The invention discloses a steam condensation type adsorption tower device system for extracting lithium from plateau salt lake brine, and belongs to the technical field of salt lake lithium extraction processes. A condenser of a multi-effect evaporation system and a traditional adsorption tower are coupled into a whole, the optimal temperature in the salt lake brine lithium adsorption process is achieved, and the lithium ion adsorption efficiency of the adsorption tower is improved; latent heat of vaporization released by condensation of secondary steam generated in a last-effect evaporator in a multi-flow tube bundle directly heats salt lake brine for adsorption and desorption processes, so that the adsorption rate of lithium in the salt lake brine is increased, fresh water required by a subsequent desorption process can be preheated, and the energy consumption cost of lithium extraction from the salt lake is reduced; the temperatures of an adsorbent and salt lake brine at different positions in the adsorption tower are optimized by reasonably arranging the flow of the condensation heat exchange tube bundle, the temperature of the adsorbent and the salt lake brine is gradually increased from top to bottom in the adsorption tower, and the temperature in the adsorption tower is increased from top to bottom to compensate the reduction of the adsorption rate caused by the reduction of the lithium ion concentration.

The invention discloses a salt lake brine mining method and system for hydraulically gradient-driven water replenishing and ore dissolving of a sedimentation funnel, and relates to the technical field of salt lake mineral resource development, the method comprises the following steps: S1, collecting water level data of a sedimentation funnel area, calculating gradient distribution, dividing functional areas, and generating zoning parameters; s2, based on the partition parameters, a water injection well network is arranged in the gradient direction, water injection parameters are determined according to the water level difference, and a well network scheme is generated; s3, based on a well pattern scheme, injecting the proportioning solvent into an ore bed in a layered manner to form a directional seepage field, and generating solute transport data; s4, on the basis of solute transport data, enriched brine is extracted in the collection area, the concentration is monitored, and brine parameters are generated; and S5, based on the deviation between the brine parameter and the target value, calculating the regulation amount, adjusting the injection-production parameter to maintain dynamic balance, and outputting the salt lake brine with the target concentration. By regulating and controlling the hydraulic gradient, the form of the settlement funnel is stabilized, the phenomena of stratum disturbance and ground settlement are reduced, and the ecological risk is reduced.

The invention relates to a salt lake lithium extraction titanium adsorption material and a preparation method thereof, and relates to the technical field of adsorption materials.The preparation method of the salt lake lithium extraction titanium adsorption material comprises the following steps that a titanium source and a lithium source are mixed and then subjected to first magnetic field sintering, and a first precursor is obtained; performing second magnetic field sintering on the first precursor to obtain a second precursor; performing third magnetic field sintering on the second precursor to obtain a third precursor; adding the third precursor into an acid solution for acidification, and then filtering and drying to obtain the titanium adsorption material for extracting lithium from the salt lake. According to the method, a three-section magnetic field sintering mode is adopted, the lithium element adsorption capacity and desorption rate of the obtained titanium system adsorption material are remarkably improved by controlling condition parameters of all stages, the efficient and stable titanium system adsorption material is provided for the field of salt lake lithium extraction, and the defects in the prior art are overcome.

The present disclosure belongs to the technical field of extraction of lithium from a salt lake, and particularly relates to an electrode and a preparation method therefor, a device for extracting lithium from a salt lake, and a method for extracting lithium from a salt lake. The surface of an electrode matrix is modified by using an amphoteric diblock copolymer, so as to form a diblock copolymer coating layer; and the amphoteric diblock copolymer contains both a hydrophilic block and a hydrophobic block, wherein the hydrophobic block is easily adsorbed on the surface of the electrode matrix to form a stable coating, and the hydrophilic block can improve the hydrophilicity of the electrode and can also complex lithium ions on the surface of the electrode, thereby improving the lithium extraction efficiency.

The invention discloses a salt lake carbonate rock multi-parameter quantitative classification and reservoir evaluation method, and relates to the technical field of oil-gas exploration. The method comprises the following steps: selecting a key well in an exploration block, collecting a plurality of salt lake carbonate rock samples, preparing an analysis sample under an anhydrous condition, quantitatively measuring a salinity parameter, a mixing index and a diagenesis strength parameter by utilizing the analysis sample, and determining a salinity code, a mixing code and a diagenesis phase code. And naming the salt lake carbonate rock based on the salinity code, the mixed product code and the lithogenous phase code, directly evaluating the salt lake carbonate rock reservoir according to a naming result, and performing single well comprehensive evaluation on the salt lake carbonate rock reservoir. According to the method, the influence of salinity, mixed accumulation and diagenesis strength on formation and evolution of the salt lake carbonate rocks is fully considered, accurate division of the types of the salt lake carbonate rocks is achieved, the reservoir naming result is directly associated with reservoir evaluation, and technical support is provided for standardized evaluation of the salt lake carbonate reservoir.

The invention discloses an ion separation solar evaporator and a preparation method thereof, and belongs to the technical field of magnesium-lithium separation. The ion separation solar evaporator comprises a transmission channel made of a two-dimensional layered material, an ion separation nanofiltration membrane, a capillary layer made of hydrogel and a water evaporation area made of a two-dimensional layered material composite surface plasmon material which are sequentially stacked, and a salt crystallization region made of a two-dimensional layered material composite rheology modifier is arranged around the water evaporation region. According to the invention, efficient selective separation of magnesium and lithium in salt lake brine / seawater is realized through a solar-driven nanofiltration membrane separation technology, the bottleneck of high energy consumption of a traditional lithium extraction process based on a nanofiltration membrane is broken through, and the salt lake brine does not need to be pretreated. In addition, lithium-containing salt can be directly collected, the subsequent treatment process is greatly simplified, and an environment-friendly, economical and efficient solution is provided for development of salt lake lithium resources.

The invention relates to the technical field of salt lake lithium extraction, in particular to an electrodialysis device for salt lake lithium extraction and a salt lake lithium extraction method.The electrodialysis device comprises a frame and a plurality of electrode plates arranged in the frame, and the interiors of the electrode plates are fixedly connected with a plurality of membrane stacks; the water inlet pipe is fixedly connected to the top of the electrode plate and is respectively communicated with the plurality of membrane stacks, the bottom of the electrode plate is fixedly connected with a plurality of water outlet pipes communicated with the membrane stacks, the interior of the water inlet pipe is fixedly connected with a partition plate for separating raw water, and the interior of the water inlet pipe is provided with a water filtering assembly for pretreating the raw water and a flow slowing plate. The multiple flow slowing plates are rotationally connected into the water inlet pipe and used for buffering raw water, the bottom of the water inlet pipe is fixedly connected with an oil shell storing oil liquid, and the top of the oil shell is provided with a plurality of turbulence making assemblies for adjusting the angles of the flow slowing plates. The three-leaf filter screen can efficiently filter impurities and particulate matters in raw water, and ensures that the water entering the membrane stack is clean.

The invention discloses an adsorption / desorption device for salt lake adsorption and lithium extraction and application thereof.The adsorption / desorption device for salt lake adsorption and lithium extraction comprises an adsorption and desorption column, an adsorbent containing area used for containing an adsorbent is arranged in the adsorption and desorption column, and a positive electrode and a negative electrode are oppositely arranged in the adsorbent containing area; the positive electrode and the negative electrode are connected through a direct-current power supply capable of reversing poles, a variable electric field can be formed during pole reversing, and the variable electric field can drive lithium ions to migrate and accelerate desorption of the lithium ions from an adsorbent, so that the lithium ion desorption efficiency is favorably improved, the concentration of the lithium ions in a desorption solution is higher, fresh water is saved, and the service life of the lithium ion battery is prolonged. And time and energy consumption are saved for subsequent concentration of lithium ions. The adsorption / desorption device for adsorbing and extracting lithium in the salt lake is simple in process flow and simple and convenient to operate, can effectively improve the desorption efficiency and save working hours, energy and fresh water, and has practical significance on utilization of lithium resources in the salt lake.

The utility model discloses a salt lake lithium extraction adsorbent scrubbing system which comprises a scrubbing tower and an adsorption tower, and a sunken water distributor is arranged at the bottom end in the scrubbing tower; the middle position of the bottom of the concave water distributor penetrates through the bottom of the scrubbing tower and is connected with a runner opening; a water replenishing opening is formed in the middle of the bottom of the scrubbing tower; two feed ports are formed in the positions, close to the water inlet, of one side of the scrubbing tower, and a water outlet is formed in the position, close to the top, of one side of the scrubbing tower; the flow channel port is sequentially connected with a pneumatic valve j, a diaphragm pump B and an adsorption column through a pipeline; according to the system, crushed resin particles and impurities are effectively removed by cleaning an adsorbent, so that the adsorption performance and the flowability of a resin bed layer are recovered, and it is ensured that the resin bed layer is always in the optimal working state. In the process of scrubbing the adsorbent, the adsorbent does not need to be manually carried except for necessary adsorption tower pipeline connection operation, so that the scrubbing efficiency is remarkably improved.

The invention relates to the technical field of lithium resource development, in particular to a ball milling-ultrasonic green leaching method for salt lake sedimentary clay lithium ore. The invention discloses a ball milling-ultrasonic green leaching method for salt lake sedimentary clay lithium ore. The method comprises the following steps: S1, primarily crushing the ore and then drying; s2, the dried minerals are subjected to plasma ball milling activation treatment; and S3, the minerals subjected to plasma ball milling activation are soaked in water, ultrasonic leaching is conducted, filtering is conducted after leaching is completed, and supernate, namely a leaching solution, is obtained. According to the ball milling-ultrasonic green leaching method for the salt lake sedimentary clay lithium ore, high-temperature roasting is not needed, the production temperature of the whole process of the technology does not exceed 100 DEG C, energy consumption is low, no acid or alkali is involved, and efficient selective leaching of lithium is achieved through water leaching.

The invention relates to the technical field of extraction of lithium from a salt lake. Disclosed are an electrode active material (1) coated with a solid-state electrolyte layer (2), and a preparation method therefor and the use thereof. The structure of the electrode active material (1) coated with the solid-state electrolyte layer (2) is a core-shell structure, wherein a core structure is composed of the electrode active material (1), and a shell structure is composed of the solid-state electrolyte layer (2); and the solid-state electrolyte layer (2) is formed by complexing polyethylene oxide, which is doped with inorganic nanoparticles, with a lithium salt, and has good lithium ion conductivity. The electrode active material (1) coated with the solid-state electrolyte layer (2) is used for preparing an electrode for extraction of lithium from a salt lake, and the obtained electrode for extraction of lithium from a salt lake has better lithium extraction efficiency, cycling stability and lithium extraction capacity.

The present application provides a method for extracting lithium from salt lakes. The method comprises the following steps: (1) subjecting concentrated brine to ammonia vapor magnesium precipitation treatment to obtain a magnesium-removed filtrate and filter residue; (2) mixing the filter residue with hydrobromic acid, adjusting the pH to precipitate boric acid, and performing solid-liquid separation to obtain a filtrate and boric acid; (3) evaporating and concentrating the filtrate obtained in step (2), performing aeration treatment after drying treatment, and performing water immersion separation treatment to obtain a lithium-rich solution and magnesium oxide; (4) mixing the lithium-rich solution and lithium carbonate to perform a solid-phase transformation reaction, and filtering to obtain a purified lithium salt solution and calcium carbonate. The method of the present application can separate boron, magnesium, and calcium-lithium in one step, and further calcium removal can separate calcium and lithium, which is beneficial to obtaining high-purity lithium carbonate and reducing lithium loss caused by the adsorption of lithium by magnesium hydroxide colloid.

A new method for extracting lithium from salt lake brine, comprising the following steps: a salt lake old brine raw material, desorption liquid, low-magnesium water, and adsorption tail liquid pass through an old brine feeding pipe (2), a desorption liquid feeding pipe (4), a low-magnesium water top desorption liquid feeding pipe (3), and an adsorption tail liquid top desorption liquid feeding pipe (11), respectively, which are located above and below a rotary disc of a multi-way valve system (1); and after respectively entering corresponding adsorption columns (6) by means of a duct and channel within the multi-way valve system (1), the entire process procedure is completed from an adsorption tail liquid discharge pipe (7), a qualified desorption liquid discharge pipe (10), a lithium-containing old brine discharge pipe (8), and an adsorption tail liquid top desorption liquid discharge pipe (5); and the adsorption columns (6) are connected in series or in parallel by means of channels located in the multi-way valve system (1). The feature in which a multi-way valve device is simple and easy to operate is utilized, and in comparison with a fixed bed operating system, the utilization rate of lithium adsorbent may be increased by over 20%, the utilization efficiency of the lithium adsorbent may be increased by over 40%, and production costs may be reduced by 30-50%. Therefore, the stability of a qualified desorption liquid is improved, stable production is guaranteed, and year-round constant operation may be achieved.

The invention provides a method for measuring the total alkalinity of pore water in salt lake water or marine sediments, aiming at the characteristics of huge alkalinity variation range of a salt lake sample and small sample amount of the pore water in the sediments, the traditional step-by-step dilution alkalinity measuring method is complicated to operate, and simple dilution of the sample can change the balance of a water body carbonate system. The accuracy of total alkalinity determination is influenced, and the uncertainty is large. The method for measuring the total alkalinity of the salt lake water with the high total alkalinity range and the marine sediment pore water with the low sample amount can be used for batch measurement of the total alkalinity of the samples, repeated dilution is not needed, one-time rapid measurement is achieved, the sample measurement accuracy is improved, and manpower and material resources are saved. In the method, the alkalinity of the prepared NaOH standard solution is calibrated more accurately based on the standard curve adding method, the effective measurement range can be expanded by adjusting the concentration of the prepared NaOH standard solution, and the method is wide in applicability.

The utility model relates to the technical field of salt lake boron resources, and particularly discloses a crystallization system for preparing borax from salt lake brine, which comprises a first hot melting batching tank, a second hot melting batching tank, a first set of crystallization tank, a second set of crystallization tank, a buffer tank and a centrifugal machine, the first crystallization tank comprises a first crystallization tank, a second crystallization tank, a third crystallization tank and a fourth crystallization tank, the second crystallization tank comprises a fifth crystallization tank, a sixth crystallization tank, a seventh crystallization tank and an eighth crystallization tank, the first hot melting batching tank collects borax mother liquor, and the borax mother liquor is mixed with a surface active additive and then enters the first crystallization tank in sequence; after the first set of crystallizing tank is cooled to a certain temperature, the materials enter a second hot-melting batching tank in a manner of introducing the discharged materials into a groove, and the materials in the second hot-melting batching tank are sequentially pumped into the second set of crystallizing tank through a pump, are continuously cooled to a certain temperature, enter a buffer tank and then enter a centrifugal machine to be separated; according to the utility model, accurate temperature and time control is carried out on two-stage cooling crystallization, and the device has the characteristics of large borax grains and no caking of products.

The invention discloses a salicylic acid anchored hydrotalcite-bentonite composite material based on salt lake bischofite as well as a preparation method and application thereof, and belongs to the technical field of preparation and application of heavy metal adsorbents. According to the invention, salt lake bischofite is used as a magnesium source, is purified and then is mixed with aluminum chloride hexahydrate, salicylic acid, bentonite and an alkaline reagent, and the composite material is prepared through a heating and pressurizing reaction. According to the material, bentonite serves as a substrate, magnesium-aluminum hydrotalcite grows on the surface, carboxyl, phenolic hydroxyl and other functional groups are anchored through flocculation and electrostatic adsorption, and the complexing capacity on heavy metal ions is synergistically enhanced. Compared with traditional hydrotalcite, the composite material has higher specific surface area, larger adsorption capacity and regeneration stability, and can efficiently remove lead ion pollution in water. The method realizes high-value utilization of salt lake magnesium resources, provides a novel adsorption material for heavy metal treatment, and has environmental protection benefits and application values.

The invention provides a salt lake lithium extraction system and method.The system comprises a multi-stage counter-current extraction mechanism, a washing mechanism and a reverse extraction mechanism which are sequentially arranged in the flow direction of an extraction agent, and the multi-stage counter-current extraction mechanism comprises two or more than two sets of multi-stage extraction tanks which are arranged in parallel; each group of multi-stage extraction tanks comprises a first-stage extraction tank, a second-stage extraction tank,..., and an n-stage extraction tank which are connected in series, each n-stage extraction tank is connected with a storage tank for brine to be extracted, and each first-stage extraction tank is connected with an extraction agent storage tank; each n-stage extraction tank is connected with a washing mechanism, a washing liquid input pipe is arranged on one side, far away from the extraction tanks, of the washing mechanism, and the other side, far away from the extraction tanks, of the washing mechanism is further connected with a reverse extraction mechanism; a back extraction liquid input pipe is arranged on one side, far away from the washing mechanism, of the back extraction mechanism, and a high-lithium liquid storage tank is arranged on one side, close to the washing mechanism, of the back extraction mechanism; according to the method, the defects of slow phase splitting and long time consumption of the extraction section are reasonably optimized, and the extraction efficiency is improved.

The invention relates to the technical field of extraction of lithium, potassium and boron in salt lakes, and discloses a method for co-producing lithium, potassium and boron by gradient utilization of original brine in salt lakes. The method comprises the following steps: S1, extracting lithium from original salt lake brine to obtain qualified lithium liquid and lithium extraction tail liquid; s2, preparing a battery-grade lithium product by using the qualified lithium liquid; s3, the lithium extraction tail liquid is subjected to beach drying through a salt pan, and potassium-containing solid salt (potassium mixed salt and carnallite), liquid old brine and bischofite are obtained; s4, preparing a potassium chloride product from the potassium-containing solid salt and bischofite; and S5, preparing a boric acid product by using the old brine. According to the method, a lithium extraction pre-treatment and salt lake brine potassium, boron and lithium process technical route is converted into a lithium, potassium and boron process route, the production cycle of a lithium salt product is shortened to 2 months from original 2-3 years, the lithium yield is increased by about one time, and meanwhile, the lithium-potassium-boron process is adopted, so that the problem that lithium extraction films and equipment are corroded and influenced by boron extraction acidification is solved, and the method is suitable for industrial production. Comprehensive development and utilization of salt lake resources are realized.

Disclosed in the present application is a method for extracting lithium from salt lake by means of electrochemical deintercalation. The method comprises the following steps: (1) separately injecting a recovery liquid into an anode chamber and injecting salt lake brine into a cathode chamber, isolating same by using an anion exchange membrane, and performing a constant-voltage reaction using a lithium-rich electrode as an anode and a lithium-poor electrode as a cathode; (2) when the current density of the constant-voltage reaction is reduced to 30-40 A / m2, injecting a highly-reductive gas into the salt lake brine; and (3) when the current density is reduced to 5 A / m2, powering same off to stop the reaction, exchanging the cathode and the anode, and repeating the constant-voltage reaction, so as to obtain a lithium-rich solution. The present application introduces the reductive gas into the brine at the cathode, so as to improve the lithium intercalation rate of the cathode, thus sufficiently ensuring the adsorption capacity of electrodes and avoiding the problem of capacity attenuation during cyclic lithium extraction processes.

The invention discloses a phenazine-based electrochemical electrode material as well as a preparation method and application thereof. The phenazine-based electrochemical electrode material is an organic small molecule material or an organic polymer which contains nitrogen, has a conjugated structure and can be subjected to electrochemical oxidation-reduction reaction. The phenazine-based electrochemical electrode material disclosed by the invention can be applied to selective separation and extraction of ions, can be used for selective extraction and separation of target ions in a multi-ion complex solution, and can be used for extracting valuable element ions step by step at high performance; the extraction method has the advantages of high ion extraction capacity, low cost, simple process and high element separation and extraction efficiency, is environment-friendly, can realize efficient development and comprehensive utilization in the fields of salt lake resources, marine resources, industrial sewage and wastewater recycling, seawater desalination and the like, and has a better industrialization prospect.

The invention relates to the technical field of lithium extraction from salt lakes, in particular to a lithium iron phosphate-composite lithium manganate composite material for lithium extraction from high-altitude salt lakes and a preparation method of the lithium iron phosphate-composite lithium manganate composite material. The composite material comprises lithium iron phosphate and composite lithium manganate, wherein the composite lithium manganate comprises spinel type lithium manganate and layered lithium manganate. According to the lithium iron phosphate-composite lithium manganate composite material provided by the invention, the adopted composite lithium manganate has a three-dimensional ion conduction channel structure of spinel type lithium manganate and high specific capacity of layered lithium manganate at the same time, and the problem that a single lithium iron phosphate material is relatively poor in conductivity and ion conductivity is solved. And meanwhile, a single type of lithium manganate additive is also avoided, and the lithium extraction efficiency and the lithium extraction capacity of lithium extraction of the high-altitude salt lake are comprehensively improved.

The invention discloses a salt lake stratum stope fixed-point flow field and brine sampling method. A rotary suction drill bit, a segmented sampling drill rod and a multifunctional positioning segmented sampler are included. The rotary suction drill bit is of a hollow structure and is fixedly connected with the segmented sampling drill rod through threads; in the drilling state, the drill bit rotates to cut a rock mass, meanwhile, drilling cuttings are pumped out through a negative pressure system, and the system measures the seepage resistance of a point position where the current rotary suction drill bit is located according to the negative pressure value and the drilling depth and evaluates the maximum seepage speed; flow field analysis holes which can be controlled to be opened in the X direction and the Y direction are formed in the segmented sampling drill rod at fixed intervals, and each hole position is provided with a positioning magnetic pin; and the multifunctional positioning sectional sampler is placed on the sectional sampling drill.

The invention discloses a salt lake old brine raw water filtering system and process, and the salt lake old brine raw water filtering process comprises the following steps: S1, filtering: pumping salt lake old brine raw water into a membrane pool of the filtering system through a raw water pump, submerging a membrane group in the membrane pool, and pumping produced water through negative pressure of a produced water pump; s2, backwashing: backwashing the membrane group in the membrane pool to recover the water production flux of the membrane; and S3, clean water flushing and chemical cleaning are conducted regularly, and long-term temperature operation of the system is guaranteed. In the filtering process of the salt lake old brine, suspended matters and the like in the salt lake old brine raw water are removed, so that a subsequent lithium extraction process is facilitated, and the utilization rate of resources is increased.

The invention discloses a salt lake lithium extraction system and a process thereof, relates to the field of salt lake lithium extraction processes, and can solve the problems of low lithium extraction purity and low lithium extraction efficiency in salt lake lithium extraction in the prior art. The salt lake lithium extraction system comprises a pretreatment unit and a membrane treatment unit, wherein the pretreatment unit is used for discharging salt lake brine and removing impurities in the discharged salt lake brine; the membrane treatment unit is connected to the next station of the pretreatment unit and is used for intercepting divalent ions in the salt lake brine and adsorbing lithium ions in the salt lake brine; and the lithium salt production unit is connected to the next station of the membrane treatment unit and is used for preparing the lithium ions adsorbed by the membrane treatment unit into lithium salt.

The present invention discloses a raw brine treatment system and a raw brine treatment method suitable for lithium extraction from salt lakes. The raw brine treatment system comprises: an ion exchange adsorption unit, the ion exchange adsorption unit comprises an adsorption tower, a part of the raw brine to be treated enters the adsorption process of the adsorption tower for adsorption treatment, and then is desorbed with desorption water in the desorption process; a desorption water extraction unit, another part of the raw brine to be treated and / or part of the adsorption tail liquid of the ion exchange adsorption unit enters the desorption water extraction unit, the desorption water extraction unit extracts desorption water from the raw brine and / or the adsorption tail liquid entering the desorption water extraction unit, and the desorption water extraction unit is connected to the ion exchange adsorption unit; a recovery unit, the recovery unit is connected to the ion exchange adsorption unit and the desorption water extraction unit. The above raw brine treatment system can alleviate or solve the problem that a large amount of process water required for desorption treatment needs to be provided by an external water source and the problem of difficulty in external discharge of tail brine.

The invention relates to the technical field of salt lake leakage, in particular to a salt lake leakage monitoring method based on a boron isotope tracer. The monitoring method specifically comprises the following steps: screening a tracer agent; selecting a detection instrument; forming an injection well in the salt lake detection area and forming a plurality of monitoring wells along the periphery of the injection well; a tracer agent is put into the injection well, sampling detection and data analysis are conducted on the monitoring well, and the position of a leakage point is determined. The monitoring method provided by the invention is beneficial to mastering the leakage flowing direction of the salt lake and identifying the specific position of the leakage point.

The present invention relates to a salt lake lithium extraction process involving low water consumption and a device, and belongs to the technical field of salt lake lithium extraction. The present technical solution comprises performing pretreatment on wastewater in a process, which comprises impurity removal and concentration; and then evaporating water in the wastewater by means of evaporation, so as to obtain recyclable water. In this way, water in wastewater is effectively recycled, thus reducing the consumption of water resources.

The invention discloses a crown ether / graphene oxide photo-thermal ion separation membrane. The crown ether / graphene oxide photo-thermal ion separation membrane comprises a photo-thermal evaporation layer and an ion separation layer, a vertical porous channel is arranged on the photo-thermal evaporation layer; the ion separation layer is arranged on one side of the photo-thermal evaporation layer. The ion separation layer can separate ions in a solution through the aperture screening effect of crown ether, so that the required single ion passes through the ion separation layer, and all the remaining ions are intercepted. The photo-thermal evaporation layer is arranged on the ion separation layer, is composed of vertical porous channels with a photo-thermal conversion effect, can generate megapascal pressure, and drives water to drive ions to be separated to penetrate through the ion separation layer to the photo-thermal evaporation layer for photo-thermal evaporation, so that ion separation is realized. The separation membrane not only can be used for separating lithium ions and various other ions in a salt lake solution to realize selective recovery of the lithium ions, but also can be used for separating other ions with different radiuses or different charges.

The invention discloses a composite material, a device and a method for efficiently extracting uranium from salt lake water flow, and particularly relates to a method for converting mechanical energy into electrochemical energy in a solid-liquid interface contact separation process of the water flow on the surface of the composite material by utilizing high-low fall flow of the salt lake water. Free uranyl ions are spontaneously reduced and deposited on a uranium collection substrate with a high specific surface area. The method effectively solves the problems caused by low efficiency, high energy consumption and use of chemical reagents in a traditional method, has good economic benefits and environmental friendliness, and is a uranium extraction strategy which is more efficient, environmentally friendly and low in cost.