135 results about "Salt lake" patented technology

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 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.

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 belongs to the technical field of membrane separation, and particularly relates to a preparation method of a self-supporting polypyrrole composite membrane and application of the self-supporting polypyrrole composite membrane in extraction of lithium from a salt lake. A polyoxazole polyhydrazide copolymer is used as a porous self-supporting base membrane, and a continuous polypyrrole functional layer is constructed on the surface of the base membrane through in-situ oxidative polymerization. A dynamic charge screening microenvironment is formed by a weak positive electricity characteristic and a highly conjugated structure in a polypyrrole molecular chain, and the interception efficiency on high-charge-density magnesium ions is enhanced through electrostatic interaction; and meanwhile, the rigid pore structure realizes selective permeation of lithium ions through size screening. Under the assistance of an external electric field, the polypyrrole layer shows excellent magnesium-lithium separation performance, lithium ions are enriched and recycled from the salt lake brine with the high Mg < 2 + > / Li < + > molar ratio, and the industrial bottleneck that ion flux and selectivity are difficult to consider at the same time in a traditional separation technology is solved.

The invention discloses a roasting system for leaching and lithium extraction of salt lake deposited clay type lithium ores, and belongs to the technical field of salt lake resource development and lithium extraction, the roasting system comprises a rack, the rack is provided with a preheating mechanism, a rotary driving mechanism and a roasting box, the preheating mechanism is used for preheating the leached salt lake deposited clay type lithium ores, and the rotary driving mechanism is used for driving the roasting box to rotate; the preheating mechanism is composed of a charging barrel, a lower conical barrel, a communicating pipe and a preheating box, a first rotating guide ring is arranged at the lower end of the charging barrel, and a first guide ring cavity is formed in an upper cavity opening of the lower conical barrel; the lower conical barrel adopts a rotating mode, and a matching structure of a first rotating guide ring at the lower end of the matched charging barrel and a first guide ring cavity at an upper cavity opening of the lower conical barrel is adopted, so that continuous circumferential shearing force and radial pushing force can be generated on the lithium ore which is high in viscosity and easy to cake after leaching, and the lithium ore is turned over along the inner wall of the conical barrel through rotation; local accumulation dead angles are avoided, and the problem that materials are bonded and blocked in a traditional fixing structure is solved.

The application relates to the technical field of brine refining equipment, and discloses a brine refining equipment for lithium extraction from salt lakes, which comprises a precipitation tank, the bottom of the precipitation tank is fixedly connected with a support frame one, and the side wall of the precipitation tank is fixedly connected with a fixing frame. In view of the problem that the excessively long precipitation distance leads to excessively long precipitation time, five groups of collecting assemblies are arranged in the equipment, the five groups of collecting assemblies divide the precipitation tank into six layers stacked up and down, when the brine enters the inside of the precipitation tank and is uniformly distributed in the six layers, the brine in the inside of the precipitation tank will be precipitated, and the precipitate will penetrate through the turbine plate and accumulate on the top of the inclined plate. In this process, the precipitate will be precipitated at the position of the corresponding inclined plate. Through the design that the six layers simultaneously precipitate, the single precipitation time of the precipitation tank is shortened, and the single precipitation time of the equipment is greatly reduced.

The invention provides a multi-electric-layer nanofiltration membrane for extracting lithium from a salt lake and a preparation method of the multi-electric-layer nanofiltration membrane, and belongs to the technical field of nanofiltration membranes. Firstly, polysulfone and dimethylformamide are put into a mixing kettle, and a membrane casting solution is obtained; coating a non-woven fabric with the membrane casting solution, and then preparing a non-woven fabric and polysulfone combined base membrane through phase inversion; soaking the base membrane in an isopropanol solution, and removing redundant solution on the surface by using a rubber roller; the preparation method comprises the following steps: coating the surface of a base membrane with a solution of a water phase 2, then removing the redundant water phase on the surface, then coating the surface with an oil phase 2, drying a membrane, sequentially and repeatedly coating the membrane with the water phase 2 and the oil phase 2 for multiple times to obtain a nanofiltration membrane with multiple middle layers, then coating the membrane with a solution of a water phase 1, removing the redundant water phase on the surface, then coating the surface with an oil phase 1, and drying to obtain the nanofiltration membrane with multiple electric layers. According to the invention, a plurality of middle layers are positively charged, so that the electrostatic repulsion effect on magnesium ions can be fully exerted, and the magnesium ion interception is obviously improved.

The invention belongs to the technical field of adsorption materials for extracting lithium from salt lake brine, and provides a ternary vanadium-titanium-niobium lithium ion sieve based on a biomimetic mineralization template and a lithium extraction device and a lithium extraction process thereof aiming at the bottleneck problems of low adsorption capacity, poor magnesium-lithium selectivity, short cycle life and the like of the existing titanium-based lithium ion sieve. The lithium ion sieve material with an anatase-brookite mixed crystal structure and three-stage through pore channels is constructed by coupling vanadium and niobium elements with a multi-stage atmosphere regulation gradient calcination process method. According to the technology, the oxygen vacancy concentration, the ion diffusion kinetics and the structural stability of the material are remarkably improved. The invention provides a novel adsorbing material solution with high adsorbability, optimization and long circularity for extracting lithium from salt lake brine with high magnesium-lithium ratio, and has important application value in the fields of promoting green and efficient development of salt lake lithium resources and new energy strategic resource recovery.

The invention belongs to the technical field of salt lake resource development and rare metal recovery, and discloses a fibrous rubidium adsorbent as well as a preparation method and application thereof, a metal-based Prussian blue analogue spinning solution is synthesized in a non-aqueous system through a one-pot method, and the fibrous rubidium adsorbent is directly prepared through wet spinning. The preparation of the powder adsorbent and the molding of the composite material are integrated, so that the process is simplified, and the problem of powder agglomeration is avoided. The prepared fibrous rubidium adsorbent has the rubidium ion adsorption capacity of 248.73 mg / L, achieves adsorption equilibrium within 7 min, is suitable for industrially recovering rubidium from high-salinity salt lake brine, and has remarkable economic and environmental benefits.

The invention discloses a method for preparing a humic acid anchored hydrotalcite coated Fe3O4 magnetic material based on salt lake bischofite and application, and belongs to the technical field of heavy metal adsorbents. The method comprises the following steps: preparing high-purity magnesium chloride hexahydrate by taking salt lake bischofite as a raw material, mixing with an aluminum source, hydrolyzing to generate a hydrotalcite precursor, and decomposing the nitrogen source to provide an alkaline environment to promote formation of a layered structure; humic acid is chelated with heavy metals through functional groups and is stably anchored on the surface of hydrotalcite, Fe3O4 is used as a magnetic substrate, the material is endowed with magnetism, and a hydrothermal one-step in-situ growth composite structure is realized. The composite material combines the advantages of humic acid, hydrotalcite and Fe3O4, the adsorption capacity is remarkably improved, chemical adsorption is enhanced, efficient solid-liquid separation is achieved, and the defects of traditional materials are overcome. When the bischofite is used as a heavy metal adsorbent, lead ions can be efficiently removed and rapidly recovered, the steps are simple, the cost is low, the effect is remarkable, a new way is developed for utilization of the bischofite in the salt lake, and the bischofite has subject and application values.

The invention relates to the technical field of metal extraction, in particular to a process for extracting magnesium from taupe salt lake clay containing magnesium in multiple occurrence states. A technology for extracting magnesium from taupe salt lake clay containing multi-occurrence-state magnesium is characterized by comprising the following steps that the salt lake clay is crushed and sieved, then fine particles are soaked in a leaching agent, and leaching liquid containing the magnesium element is obtained through filtering; wherein the leaching agent is prepared from concentrated hydrochloric acid, concentrated sulfuric acid and low-salinity water, and the volume ratio of the concentrated hydrochloric acid to the concentrated sulfuric acid to the low-salinity water is (0.05-0.15): (0.05-0.15): 0.8; the low-salinity water is natural water of the horse-sea basin. According to the method, the low-salinity water and the mixed acid (sulfuric acid and hydrochloric acid) are adopted to prepare the composite extracting agent, the efficient leaching rate is achieved through the multiple cooperation mechanisms of Cl <-> competitive adsorption replacement, sulfate radical complexing dissolution and the ultrasonic cavitation effect, the leaching capacity is greatly improved compared with a single water body technology, and meanwhile acid wastewater discharge is reduced.

The invention relates to the technical field of construction engineering foundation treatment, in particular to a foundation structure based on a high-saturation brine crystallization technology and a construction method of the foundation structure. The foundation structure comprises a basic primary salt rock bearing layer, a bottom framework cementing layer and a surface sand gravel compensation layer. As the magmatic rocks are very hard, high in density and enough in salt lake chemical environment resistance, the magmatic rocks are directly put into a hypersalinity brine area to form a rigid framework, framework building-in, gap filling and overall cementing are achieved through natural crystallization of salt lake hypersalinity brine, and a core rigid framework of the foundation is formed; the structure can be connected with a primary salt rock bearing layer of a lower foundation to form a stress transmission system, can resist soaking erosion caused by conventional fluctuation of the brine water level, has anti-floating and anti-seepage dual performance, can improve the foundation bearing capacity and the anti-settling capacity, and enables a building newly built on a salt lake to be more stable. Meanwhile, the magmatic rocks are natural materials, so that the salt lake environment is not polluted, and the environmental protection property is good.

The application discloses a self-supporting fracturing fluid system prepared by using various natural salt water and application thereof, and provides a self-supporting fracturing fluid system for development of geological energy (in particular, oil and gas, geothermal energy and natural gas hydrate), which is not affected by ion concentration in seawater, salt lake water and surface water, has low requirement on water source, can be prepared by using various types and concentrations of mineralization water source at the same time, and can be directly prepared by using various surface water to prepare the self-supporting fracturing fluid system, so that the requirement of water source for fracturing technology in areas lacking fresh water is met.

The invention provides a brine salt production system optimization technology innovation integration before drying of periodic drought and flood alternation type salt lake ecological management, belongs to the technical field of salt lake ecological management and resource comprehensive utilization, and particularly relates to a brine salt production system optimization technology innovation integration before drying of periodic drought and flood alternation type salt lakes by taking ecological management as a primary task and in a window period before drying of the periodic drought and flood alternation type salt lakes. Through digital regulation and control and multi-technology system optimization integration, the integrated system and method for reducing the source of salt-alkali dust storm, recovering high-value salt resources, realizing zero emission of old brine and quickly recovering an ecological base are realized. The integrated system has the following remarkable benefits: the ecological benefits are excellent: white tornado type salt-alkali dust storm formed after the periodic drought and flood alternating type salt lake is dried up is effectively eradicated, the discharge flux of the salt-alkali dust is reduced to be less than or equal to 5 mu gms, and the dust source reduction rate is gt; 92%; after treatment, the vegetation coverage rate of the lake basin is not less than 40% in one year and not less than 70% in three years. The recovery rate of NaSOis is not less than 90%, and the recovery rate of NaCl is not less than 85%.

A salt lake deep rock salt mining method belongs to the field of salt lake mining, and comprises the following steps: detecting crack distribution of an underground rock salt layer by using a geological radar, opening cracks by using a drilling method to form grouting drill holes, and injecting modified bentonite slurry into the grouting drill holes to make the modified bentonite slurry fully permeate into the rock salt cracks, so as to form a rock salt layer; further, rock salt cracks are damaged after the modified bentonite in the modified bentonite slurry loses efficacy; and drilling and digging the grouting hole by using a drill bit, cooling the drill bit by using bentonite slurry as circulating liquid in the drilling and digging process, collecting the circulating liquid, and airing to separate out salt, thereby completing deep rock salt mining. The bentonite slurry is used as circulating liquid, the drill bit is effectively cooled, the absorptivity of salt is greatly improved, salt dissipation is reduced, compared with a traditional mining method, the mining depth can be expanded to 5 m or below, and a revolutionary scheme is provided for efficient and sustainable development of salt lake resources.

The application relates to the technical field of refractory material preparation, and particularly discloses a preparation method of high-purity high-bulk-density sintered magnesia from salt lake. The method uses magnesium hydroxide produced by salt lake bischofite as raw material, obtains high-purity magnesium oxide powder through suspension furnace light burning, and then sequentially goes through fine grinding, ball pressing, maintenance, high-temperature calcination under oxygen-rich conditions and cooling to obtain sintered magnesia with high purity and high bulk density. By controlling the particle size and burning vector in the fine grinding process, introducing pre-pressing and exhaust devices in the ball pressing link, using shaft kiln waste heat in the maintenance link, combining the shaft kiln staged preheating-calcining-cooling process and oxygen-rich combustion conditions, the compressive strength and forming stability of the ball material can be significantly improved, and the densification and uniformity of the calcining process can be ensured. The method can fully utilize the salt lake magnesium resources, reduce the dependence on magnesite, and the prepared sintered magnesia has excellent performance of MgO content being greater than or equal to 99.0%, bulk density being greater than or equal to 3.40 g / cm 3 , and can meet the application requirements of high-end refractory materials.

This invention discloses a method for preparing high-purity lithium phosphate using lithium precipitation mother liquor from salt lake brine. The method includes: placing the lithium precipitation mother liquor from salt lake brine and a dispersant in a closed reaction apparatus and heating to 70℃-95℃; then introducing a phosphoric acid solution and performing a crystallization lithium precipitation reaction followed by aging to obtain crude lithium phosphate; wherein the dispersant includes an ethylene glycol polymer; purifying and drying the crude lithium phosphate to obtain high-purity lithium phosphate. The method provided by this invention features simple process, high lithium yield, controllable crystallization process, high product purity, single raw material usage, economic rationality, and environmental friendliness, which is beneficial for the high-value, efficient, and sustainable development and utilization of salt lake resources.

The invention provides a method for preparing sodium carbonate from salt lake lithium extraction waste liquid. The method comprises the following steps: S1, carrying out first nanofiltration on the salt lake lithium extraction waste liquid to obtain first nanofiltration material liquid and first nanofiltration waste liquid; s2, the first nanofiltration material liquid is subjected to permeation, and permeation material liquid and permeation waste liquid are obtained; s3, adjusting the pH value of the transparent material liquid to obtain a pretreated transparent material liquid, and carrying out second nanofiltration on the pretreated transparent material liquid to obtain a second nanofiltration material liquid and a second nanofiltration waste liquid; s4, performing monovalent ion selective electrodialysis treatment on the second nanofiltration material liquid to obtain electrodialysis material liquid and electrodialysis waste liquid; and S5, sequentially carrying out evaporation concentration and cooling crystallization on the electrodialysis feed liquid to obtain sodium carbonate crystals. The method is simple in process flow, low in raw material cost and environment-friendly, the comprehensive utilization efficiency and economic benefits of salt lake resources can be remarkably improved, and the method has important industrial application value and wide market prospects.

The application belongs to the technical field of lithium extraction, and discloses a method and device for extracting lithium from salt lake raw brine, which comprises the following steps: performing crystallization treatment on the raw brine in advance before adsorption lithium extraction, so as to reduce the saturation degree of salt in the raw brine; and then performing adsorption lithium extraction on the treated raw brine. The crystallization treatment on the raw brine in advance before adsorption lithium extraction reduces the crystallization trend of the crystallization components in the raw brine during adsorption lithium extraction, thereby avoiding a series of problems such as plugging of the adsorption column and caking of the adsorbent caused by crystallization of salt during adsorption lithium extraction.

The invention provides a method for realizing nitrogen removal and methane emission reduction through QS regulation and control. The method comprises the following steps: providing a salt lake solution to be treated; denitrifying anaerobic methane oxidation microorganisms exist in the salt lake solution; the concentration of quorum sensing signal molecules C6-HSL in the salt lake solution is increased, so that the final concentration of the quorum sensing signal molecules C6-HSL in the salt lake solution is 98-102 [mu] g / L, the abundance of the denitrifying anaerobic methane oxidation microorganisms is increased through QS, and the denitrifying anaerobic methane oxidation reaction in the salt lake solution is promoted. According to the present invention, with the salt lake sediment oxidation promoting agent, the oxidation of CH4 in the salt lake sediment can be promoted, the degradation of NO3 <-> and NO2 <-> in the salt lake sediment can be promoted, the salt lake sediment can be directly decomposed into N2, the CH4 emission caused by the lake salinity reduction due to the glacier melting can be retarded, other influences can not be generated, and the environmental protection can be provided;

The application discloses a method for determining the spatial distribution of seepage dominant channels of a dry salt lake halogen storage layer, which comprises the following steps: selecting at least one hydrological observation line between a water supplement channel and a halogen extraction channel, interval arranging a plurality of first-level observation holes penetrating aquifers on the hydrological observation line, collecting halogen water samples in the plurality of first-level observation holes and performing detection to obtain second-level control observation holes, taking the second-level control observation holes as centers, and interval arranging at least three second-level observation holes; collecting halogen water samples in the plurality of second-level observation holes and performing detection to screen out second-level observation holes located on seepage dominant channels, and the screening is continued until a plurality of observation holes located on seepage dominant channels are obtained, and the region where the plurality of observation holes are located is the spatial distribution of the seepage dominant channels. The application can quickly determine the spatial distribution of seepage dominant channels of a dry salt lake halogen storage layer only by means of drilling and halogen water chemical characteristic detection.

The invention relates to a method for identifying a clastic rock low-resistivity oil layer in a salt lake sedimentary environment, and belongs to the technical field of oil exploration and development. The identification method for the clastic rock low-resistivity oil layer in the salt lake sedimentary environment comprises the following steps: determining an identification standard of a dry layer and a production layer in a target layer of a research area based on a corresponding relation of porosity data, permeability data and reservoir types of the target layer encountered by a standard well in the low-resistivity research area; based on the corresponding relation of the irreducible water saturation, the movable water saturation and the reservoir type of the standard well drilling encountering target layer in the research area, the identification standards of the oil layer, the same oil-water layer and the water layer in the production layer in the target layer in the research area are determined. According to the method for identifying the clastic rock low-resistivity oil reservoir in the salt lake sedimentary environment, the reservoir seepage characteristics are considered, the Archie formula is corrected, and the movable water saturation is introduced, so that the identification accuracy of the low-resistivity oil reservoir can be effectively improved.

The utility model relates to adsorption tower technical field especially relates to a kind of filter device, filter storage device and filling device for adsorption resin filling of salt lake lithium extraction production.The utility model first aspect proposes a kind of filter device, comprising: filter screen;Fixed ring;At least one spring and a telescopic rod;The spring and the telescopic rod are all one end connection filter screen, other end connects the fixed ring;With the filter screen contact vibration device, the vibration device makes filter screen vibrate.The utility model second aspect proposes a kind of filter storage device, comprising: above-mentioned filter device, the filter device is equipped with collecting device on;Place storehouse;The filter device is connected with the opening of the place storehouse.This utility model third aspect proposes a kind of filling equipment, comprising: above-mentioned filter storage equipment;The place storehouse is equipped with fan and discharge port;Tank body;The tank body is connected with the discharge port of the place storehouse by pipeline.

The application discloses a method for preparing a light energy original halogen lithium adsorbent from red mud, and the red mud is prepared into an adsorbent capable of selectively adsorbing lithium ions in salt lake original halogen by processes such as calcination activation, lithium salt pore expansion and lithium removal. The method uses the red mud as a raw material, realizes high-value comprehensive utilization of the red mud, reduces the environmental pollution caused by the red mud, uses light energy to extract lithium from the salt lake original halogen, effectively reduces the emission of greenhouse gases such as carbon dioxide, and reduces the cost of lithium extraction from the salt lake original halogen in China. The method has important significance for the comprehensive utilization of the red mud and the development and utilization of lithium resources in the salt lake in China.

The utility model discloses a salt lake brine adsorption lithium extraction device, which belongs to the technical field of salt lake lithium extraction, and comprises a support plate and a support component mounted on the support plate, a collection box is mounted on the support component, a filter box is mounted on the collection box, a top cover is mounted at the top of the filter box, and the filter box is mounted on the top cover. A filter screen is mounted at one end of the filter box, an inserting rod is mounted on the top cover, an inserting groove matched with the inserting rod is formed in the collecting box, a limiting mechanism is slidably mounted on the supporting assembly, a first liquid adding pipe is mounted on the top cover, and an extraction mechanism is mounted on the supporting plate. According to the salt lake brine collecting device, the inserting rod is connected with the inserting groove in a clamped mode, the connecting block is pulled, the inserting rod is pulled out of the inserting groove, the filter screen can be detached and cleaned, the filter screen is prevented from being blocked and affecting the filtering effect, salt lake brine is added into the collecting box, impurities and silt are filtered through the filter screen, and the filtered brine falls into the collecting box; and the first conveying pump is started to convey the brine in the collecting box into the extraction box.

The present application relates to underwater pipeline construction technology field, concretely is a kind of salt lake takes brine pipeline sinking method, by making water head hoisting and installation work ship, after assembling pipe section on shore, pipe section is gradually installed in the rear of water head, when water head reaches the design water intake position, sinking pipe is carried out.This method can pull water head and water pipeline to specified position by the propeller driven by work ship, only need to lock down gravity anchor to lock ship when reaching specified position, it is suitable for small water depth, strong wind salt lake;Counterweight is used on pipeline to overcome salt lake buoyancy, speed up sinking pipe speed, counterweight is made of special mould, by concrete wrapping steel structure, it can effectively reduce the corrosion of steel structure, and after connecting counterweight, secondary grouting formwork can be wrapped with expansion concrete connecting bolt, further reduce corrosion.

This invention discloses a method for preparing a high-salinity intelligent responsive cement-based anti-salt corrosion and self-healing material. The method includes constructing an intelligent responsive base by preparing a microcapsule self-healing agent and regulating the ZIF-8 preparation process, followed by in-situ growth of Mg-Al-LDH and functional film coating. This achieves the synergistic functions of active anti-salt corrosion, efficient and stable self-healing, promoting cement hydration, and regulating ion adsorption in high-salt environments. This invention can accurately sense changes in high-salt environments and intelligently release the self-healing agent, realizing the dual functions of anti-salt corrosion and self-healing in cement-based materials. It can be widely applied in cement-based engineering projects in high-salt environments such as marine and salt lake environments, extending the service life of concrete structures.

The utility model discloses a flood bank suitable for a salt lake area. The flood bank comprises a flood bank body, a clay layer, an anti-seepage layer and an anti-seepage wall. The impermeable layer is provided with an inclined impermeable part and a horizontal impermeable part; the clay layer is laid on the anti-seepage layer, and the free end of the inclined anti-seepage part extends out of the clay layer and is buried in the flood bank body. The anti-seepage wall is inserted into a bottom soil body of the waterside of the anti-seepage layer, and the free end of the horizontal anti-seepage part extends out of the bottom of the clay layer and wraps the upper portion of the anti-seepage wall. The upper portion of the anti-seepage layer is buried in the flood bank body, the lower portion of the anti-seepage layer extends to the anti-seepage wall and is connected with the anti-seepage wall to form an integral anti-seepage system, water flow can be prevented from entering the flood bank body, the problems that the salinized soil flood bank sinks when encountering water and a foundation leaks are solved, large-scale application of salinized soil can be achieved, and the anti-seepage system is suitable for large-scale popularization and application. The technical problems of shortage of building materials and high transportation cost of the flood bank in the salt lake area are solved. The clay layer can be used as a gland to improve the stability of the flood bank.

The invention provides a salt lake lithium extraction nanofiltration membrane production process, which is characterized in that drying equipment is used for heating and curing, the drying equipment comprises a pretreatment unit, the pretreatment unit comprises a liquid collection box, a conduction assembly and an extrusion assembly are arranged above the liquid collection box, and two symmetrically distributed lower water scraping assemblies are arranged below a membrane body; an upper water scraping assembly is arranged above the membrane body, and the lower water scraping assembly and the upper water scraping assembly make contact with the lower surface and the upper surface of the membrane body respectively. The extrusion assembly, the lower water scraping assembly and the upper water scraping assembly are used for carrying out water extrusion and water scraping protection treatment on a film body, the film body entering the drying oven body can be guided through the conduction assembly and the regulation and control assembly, the position of the film body is changed, water extrusion and water scraping treatment on the film body are facilitated, and the film body drying efficiency is improved. Removable liquid on the membrane body can be removed before drying, the water content of the nanofiltration membrane can be reduced, and the heating and curing effect and efficiency of the membrane body can be improved.

The invention discloses a high-value recovery method for magnesium ions in a salt lake and a product prepared through the high-value recovery method, and belongs to the technical field of hydrometallurgy. The method comprises the following steps: carrying out neutralization reaction on salt lake brine by using slurry subjected to CaO digestion treatment, and filtering and washing after the reaction to obtain Mg (OH) 2 and neutralized filtrate; carrying out dehydration treatment on Mg (OH) 2, and roasting after dehydration treatment to obtain an active MgO product; carrying out evaporative crystallization and dehydration treatment on the neutralized filtrate to obtain anhydrous calcium chloride; and pelletizing and activating the anhydrous calcium chloride to obtain the CaCl2 desiccant product. According to the method, the active MgO product is prepared, efficient and high-value recovery of magnesium ions is achieved, the byproduct CaCl2 drying agent is obtained, and salt lake resources are utilized to the maximum extent.