127 results about "Lepidolite" patented technology

The application discloses a low-grade lepidolite flotation combined collector and application thereof, and belongs to the technical field of mineral processing. The lepidolite flotation combined collector SDI-101 of the application is composed of a cationic collector and an anionic collector, and includes the following raw materials in mass fraction: 20%-80% of an amine collector and 20-80% of an amino carboxylic acid collector. The combined collector is used to cooperatively improve the flotation efficiency of the low-grade lepidolite ore. In the case that the Li2O grade of the lepidolite raw ore is lower than 0.5%, a lepidolite concentrate with a Li2O grade of about 2% and a recovery rate of more than 80% can be obtained through a 'one-roughing-one-cleaning-one-scavenging' flotation process. The lepidolite combined collector of the application is applicable to the low-grade lepidolite ore, and the raw ore does not need desliming treatment. The lepidolite combined collector of the application has the advantages of strong collecting property and adaptability, can effectively improve the grade and recovery rate of the lepidolite concentrate, and promotes the efficient use of lepidolite resources.

The invention discloses a lightweight lithium mineral microscopic image real-time detection and instance segmentation method, and belongs to the technical field of computer vision and image segmentation, and the method comprises the steps: constructing a sample data set; wherein the sample data set comprises lithium mineral microscopic images and corresponding segmentation labels; the YOLO11-seg segmentation model is improved, and the improved YOLO11-seg segmentation model is obtained; the sample data set is used to train the improved YOLO11-seg segmentation model; and the trained and improved YOLO11-seg segmentation model is utilized to realize lithium mineral microscopic image real-time detection and instance segmentation. The model provided by the invention can be deployed in resource-constrained equipment and embedded equipment, and can realize accurate detection and segmentation of main components (lepidolite, quartz and feldspar components) in lithium ore.

This invention provides a method and equipment for preparing compound fertilizer using lepidolite slag as raw material. The method includes the following steps: S1, pretreatment: lepidolite slag is taken, crushed, and screened to obtain lepidolite slag particles with a particle size of 40 to 400 mesh; S2, activation: lepidolite slag is thoroughly mixed with an activator and a flux, and then ground to obtain powder with a particle size less than 80 mesh, wherein the activator is sodium hydroxide and anhydrous sodium carbonate, and the flux is calcium oxide; S3, sintering: the activated and ground powder is sintered at a temperature of 650℃-1000℃ for 0.5 h-5 h; S4, compounding: trace elements are added to the sintered fertilizer, mixed evenly, and ground into powder. The method for preparing compound fertilizer using lepidolite slag as raw material provided by this invention can effectively utilize lepidolite slag to prepare compound fertilizer, solving the environmental problem of large-scale accumulation of lepidolite slag and realizing the resource utilization of waste.

This invention relates to the field of lepidolite calcination technology, and particularly to a high-temperature calcination process and apparatus for lepidolite based on tail gas purification. The apparatus includes a calcination kiln body, and a feed hopper and a discharge cylinder rotatably connected to both ends of the kiln body. The kiln body is equipped with a conveying and screening mechanism for graded calcination of lepidolite, and a recovery and purification mechanism for multi-stage treatment of calcination tail gas is located on one side of the kiln body. This invention achieves graded conveying and processing of lepidolite through the counter-rotation of the kiln body and the rotating cylinder, controlling the transit time of lepidolite within the kiln body. This avoids the phenomenon of some lepidolite being discharged too slowly or too quickly, leading to local over-calcination or incomplete calcination. The graded screening calcination process for lepidolite allows small lepidolite particles to be retained by the screening mesh, delaying discharge and extending the calcination interval, creating a difference in calcination time between small and large lepidolite particles. This effectively avoids the problems of over-calcination of small particles and incomplete calcination of large particles.

The invention provides a method and a device for preparing an adsorbent for adsorbing rubidium and cesium from lepidolite leachate. The preparation method of the adsorbent for adsorbing rubidium and cesium from the lepidolite leachate comprises the following steps: S1, weighing straw powder, and carrying out soda boiling treatment on the straw powder; s2, filtering while hot, collecting filter residues, washing with deionized water, and drying; s3, transferring the filter residues into a high-pressure kettle, and adding deionized water for hydrothermal reaction to obtain a reaction product. According to the preparation method and device of the adsorbent for adsorbing rubidium and cesium from the lepidolite leaching solution, the adsorbent has the effects of high adsorption capacity, good selectivity and stability in the aspect of rubidium and cesium adsorption, and the material can adsorb a large number of rubidium and cesium ions due to the rich pore structure and ion exchange sites; and the enrichment capacity on low-concentration rubidium and cesium is improved.

The invention discloses a bifunctional ionic liquid as well as a preparation method and application thereof, and belongs to the technical field of lithium resource extraction and hydrometallurgy. According to the invention, the dual-functional ionic liquid is prepared, and the dual-functional ionic liquid can be used for synchronously realizing efficient extraction of lithium ions from the lepidolite acid leaching solution and synergic deep removal of fluorine and chlorine, so that the limitation and defects of a traditional solvent extraction agent are effectively overcome; the problems that an existing lepidolite lithium extraction technology is long in process, low in separation efficiency and serious in equipment corrosion can be solved.

The invention provides a novel lithium extraction method and device for low-grade lepidolite. The novel lithium extraction method for the low-grade lepidolite comprises the following steps: S1, mechanical activation pretreatment: crushing raw ore, treating the crushed raw ore for 2 hours by adopting a planetary ball mill, adding a sodium polyacrylate dispersing agent, and carrying out ultrasonic treatment; according to the novel lithium extraction method and the novel lithium extraction device for the low-grade lepidolite, the specific surface area of the treated mica is increased by 3-5 times, the contact area between the treated mica and assistants and a leachate is greatly increased, the subsequent roasting reaction rate and the lithium leaching efficiency can be improved, the waste of raw materials is reduced, two assistants are matched for segmented roasting, and the cost is reduced. Compared with a traditional process, the roasting temperature is greatly reduced, the energy consumption is greatly reduced, the production energy consumption cost is reduced, calcium fluoride reacts with substances generated in the reaction process (to generate calcium sulfate), fluorine element in-situ fixation is achieved, fluoride dissipation is avoided, the industrial environment-friendly problem of fluorine pollution in the traditional process is solved, and the environment-friendly emission requirement is met.

The invention discloses a method for solidifying lepidolite tailings through cooperation with fly ash under assistance of multi-stage ultrasonic heat and a derivative material for solidifying the lepidolite tailings, and belongs to the technical field of harmless and resourceful treatment of soil bodies and gravel materials. The method comprises the following steps: performing first-stage heat assistance and first-stage ultrasonic treatment on nano silicon dioxide, hydroxide and silicate to obtain a compound activator; carrying out second-stage heat assistance and second-stage ultrasonic treatment on the compound exciting agent and fly ash to obtain a mixed curing agent; mixing the mixed curing agent with the lepidolite tailings, and carrying out third-section heat assistance to obtain mixed slurry; the mixed slurry is subjected to injection molding under fourth-section heat assistance, then third-section ultrasonic treatment is conducted, then sealed curing and fifth-section heat assistance are conducted, demolding is conducted, and the lepidolite tailing slag curing derivative material is obtained. According to the method, the solidification of heavy metals in the lepidolite tailings can be enhanced in a manner of multi-section ultrasonic heat-assisted cooperation with the fly ash, and harmlessness, stabilization and recycling of the lepidolite tailings are realized.

The present application relates to a kind of composite organic acid low-temperature calcination lepidolite high-efficiency lithium extraction method.Composite organic acid low-temperature calcination lepidolite high-efficiency lithium extraction method includes the following steps: adding activating agent to lepidolite concentrate, pre-activation treatment, obtain the activated lepidolite concentrate powder;Lepidolite concentrate powder is mixed with composite organic acid calcining agent acidification calcination, obtain the calcination product;Water is added to the calcination product and leaching, suction filtration, obtain the lithium-containing leaching solution;Composite organic acid calcining agent at least includes methyl sulfonic acid.The present application solves the problem that TOT layered structure in lepidolite is difficult to destroy, resulting in low lithium ion extraction efficiency, also solves the problem that Si-O bond in the existing lepidolite crystal framework is difficult to dissociate, resulting in low lithium ion extraction efficiency.

The present application relates to the technical field of metallurgy, and particularly relates to an extraction device for rubidium and cesium salts in lepidolite. The present application can improve the efficiency of extracting rare metal elements from lepidolite, reduce the waste of rare resources, and help to simplify the process operation of extraction. The present application comprises a support, an extraction cylinder, a plate cover, a bolt and the like. The extraction cylinder is fixedly connected to the upper part of the support. Plate covers are clamped on both sides of the middle part of the extraction cylinder. Bolts are inserted into the left and right sides of the middle part of the extraction cylinder. The present application drives the six-sided rod to rotate by rotating the threaded rod driven by the motor, so that the stirring rod rotates and stirs the solid-liquid mixture of the mixed lithium mica powder and dilute sulfuric acid solution on the high-temperature rubber plug, avoids the precipitation of the lithium mica powder, and further makes the lithium mica powder and the dilute sulfuric acid solution fully mixed, so that the chemical reaction occurs rapidly, and the metal elements such as rubidium, cesium and lithium in the lithium mica powder are extracted.

The application provides a beneficiation method for lithium extraction from iron lepidolite ore by magnetic suspension, which adopts a process flow of "high-gradient high-intensity magnetic separation pre-concentration-flotation recovery-flotation tailings returning to magnetic separation operation" to separate and recover the iron lepidolite, and the magnetic separation operation adopts a high-gradient magnetic separator to recover the iron lepidolite through one or more high-intensity magnetic separation operations and preliminarily separate the iron lepidolite from muscovite and other gangues; the magnetic products obtained through the magnetic separation operation are combined and subjected to flotation, and a high-efficiency iron lepidolite flotation collector LYP is used to obtain high-quality iron lepidolite concentrate; the flotation tailings are returned to the high-gradient magnetic separation operation, and finally the efficient separation of the iron lepidolite is realized. The application is a new beneficiation method for iron lepidolite ore, which is stable, efficient, has strong adaptability, good separation effect and high recovery index, and is suitable for popularization and application.

The present application relates to a kind of weak magnetic lepidolite pre-elution waste-flotation enrichment method, belong to mineral processing technical field.The present application carries out coarse grinding, slurry conditioning to low-grade weak magnetic lepidolite, is pre-elution waste by high gradient magnetic separation, obtains coarse-grained high-grade lithium-containing magnetic product, again by concentration, fine grinding treatment, adds composite regulator and composite collector to carry out the selective regulation of slurry environment and mineral surface characteristics, using two roughing, once scavenging, once concentration can obtain high-quality lithium concentrate.The present application removes most of the gangue in the ore by magnetic separation, and once enrichment of weak magnetic lepidolite greatly reduces the ore processing capacity of subsequent process;Adopting fine grinding realizes that lithium mica is fully dissociated, and the new composite reagent developed is used to carry out selective hydrophobic flotation to lithium-containing magnetic product, which can realize secondary enrichment of weak magnetic lepidolite, and provides a new method for clean separation and efficient recovery of low-grade complex and difficult-to-select lithium ore.

The application discloses a method for recovering lepidolite by composite magnetization magnetic separation. The method comprises the following steps: mixing and ball-milling raw ore containing lepidolite and an activator containing iron powder, a sulfate and ferroferric oxide, dispersing the obtained ball-milling product in a solvent to form a slurry, performing superconducting low-intensity magnetic separation on the slurry to obtain an iron-removed slurry, and performing superconducting high-intensity magnetic separation on the iron-removed slurry to obtain magnetized lepidolite. The method greatly improves the surface activity of lepidolite through the synergistic effect of high-energy ball-milling mechanical energization and activator chemical energization. Furthermore, the method uses a multi-stage composite magnetization magnetic separation process of surface magnetization-low-intensity magnetic separation-high-intensity magnetic separation, thereby greatly improving the concentrate grade while improving the recovery rate of lepidolite. The method is simple in process, low in equipment investment, and suitable for industrial production and application.

This invention provides an apparatus for oxygen-enriched roasting of lepidolite. The apparatus includes: a roasting furnace; a feed trough disposed on the roasting furnace, with a discharge trough at the bottom of the furnace, the outlet of which is sealed by a sealing plate; and a combustion assembly mounted on the roasting furnace for roasting the lepidolite. The apparatus for oxygen-enriched roasting of lepidolite provided by this invention prepares oxygen-enriched gas and fuel through an oxygen-enriched air preparation assembly, which then enters the roasting furnace for combustion. Because the fuel burns faster and more completely in an oxygen-enriched state, the emission of harmful gases is effectively reduced. The oxygen-enriched gas lowers the fuel's ignition point; under the same natural gas mass and flow rate, a higher oxygen content in the oxygen-enriched air results in a higher flame temperature, significantly improving the utilization rate of thermal energy.

The invention provides a novel lithium, rubidium and cesium co-extraction method for reducing and roasting lepidolite at low temperature by compounding calcium salt with thiosulfate, and belongs to the technical field of extraction of lithium, rubidium and cesium from lepidolite concentrate. Based on the problems of high energy consumption, large slag yield, serious tail gas pollution and the like of a traditional sulfate roasting method, the following changes are made: a roasting aid is changed into a mixture of sodium salt and calcium salt, so that the cost of the roasting aid is reduced by 10-30%; wherein the sodium salt destroys the lattice structure of lepidolite concentrate through a reduction reaction, the leaching rate of lithium, rubidium and cesium is increased by 3%-5%, the calcium salt realizes fluorine fixation through the reaction of calcium ions and fluorine ions, the amount of tailings generated by roasting is reduced by 30%-50%, and tail gas purification is not needed; on the basis of a traditional roasting method, a novel tubular furnace roasting temperature rising procedure is fused, and the roasting heat efficiency is improved by 30% through different reactions in different time zones. In conclusion, the method has high research value and application prospect in improvement of the leaching rate of lithium, rubidium and cesium and treatment of tailings.

The invention relates to the technical field of lepidolite extraction, in particular to a method for removing fluorine and chlorine from brine obtained by extracting lithium from lepidolite. A method for removing fluorine and chlorine from lepidolite lithium extraction brine comprises the following steps that S1, pretreatment is conducted, specifically, boric acid is added into the lepidolite lithium extraction brine, a sulfuric acid solution is added after sufficient and uniform mixing is conducted, the pH of the brine is adjusted to be 5-5.5, and pretreated brine is obtained; s2, fluorine and chlorine removal: the pretreated brine and a fluorine and chlorine removal extraction agent are mixed and then subjected to extraction treatment, a water phase and an oil phase are separated, the water phase is lithium extraction brine subjected to fluorine and chlorine removal, the fluorine and chlorine removal extraction agent comprises a composition extraction agent and isooctyl alcohol, and the composition extraction agent is composed of trioctyl methyl ammonium sulfate and trioctyl methyl ammonium chloride. The method has high selectivity and removal rate for chlorine and fluorine in the lithium extraction brine from lepidolite, and the lithium loss rate is relatively low.

The application provides a method for recycling calcium sulfate in lithium mica production of lithium carbonate, and belongs to the technical field of smelting.The lithium mica is calcined with the calcium sulfate clinker, the pressure filtration residue after the lithium ion is leached by water is put into an aqueous sulfamate solution and is stirred again, the calcium sulfate in the residue is reacted with the sulfamate and is dissolved, ion exchange is carried out through a sodium type ion exchange resin, backwashing and precipitation processes are carried out, the calcium sulfate is generated again, and the calcium sulfate is returned as a lithium mica auxiliary material, so that the recycling of the calcium sulfate is realized, and the treated filter residue is used as a mixed material and does not affect the performance of the prepared cement.The process can significantly improve the consumption amount of the lithium mica residue in the cement industry, saves the land resources occupied by the stacking or landfill of the lithium mica residue, reduces the environmental protection pressure, and has a wide application prospect.

The application discloses a recovery method of iron lepidolite ore, which comprises the following steps: crushing and double-layer screening of iron lepidolite ore raw materials to obtain upper unscreened powder, middle unscreened powder and screened powder; magnetic separation preselection of the obtained middle unscreened powder to obtain preselected concentrate; mixing of the upper unscreened powder and the preselected concentrate for grinding; mixing of the obtained powder and the screened powder for two-stage classification; high-gradient magnetic separation of the obtained two-stage classification sand and two-stage classification overflow to obtain lithium concentrate and tailings. The recovery method has the advantages of simple process, convenient operation, low recovery cost, small loss of fine metal particles, low grinding amount, high separation efficiency, cleanness and non-toxicity, and can recover lithium concentrate with high Li2O grade and high Li2O recovery rate. The recovery method is a new beneficiation process with good separation effect, economic environmental protection and high efficiency in recovery of lithium resources from low-grade iron lepidolite ore, has high use value and good application prospect.

A method for full-particle size flotation of slime-containing lepidolite ore is provided. The method includes: mixing a compound regulator and the slime-containing lepidolite ore, subjecting an obtained mixture to ball milling, and adding water and conditioning; adding a compound inhibitor and a compound collector in sequence to a resulting slime-containing lepidolite ore pulp, and conducting a primary rougher; adding the compound inhibitor and the compound collector in sequence to a resulting primary rougher tailing, and conducting a secondary rougher; adding the compound inhibitor and the compound collector in sequence to a resulting secondary rougher tailing, and conducting scavenger; combining a resulting primary rougher concentrate and a resulting secondary rougher concentrate, adding the compound inhibitor to a resulting mixed rougher concentrate, and conducting a primary cleaner; subjecting a resulting primary cleaner concentrate to a secondary cleaner; regarding a resulting secondary cleaner concentrate as a lithium flotation concentrate.

The utility model discloses a lepidolite leachate storage device which comprises an inner container layer, a polyurethane gel layer is fixedly sleeved on the outer surface of the inner container layer, and a shell layer is fixedly arranged on the outer surface of the polyurethane gel layer. A top cover is fixedly mounted on the top surface of the shell layer, and an anti-sedimentation mechanism is fixedly mounted on the top surface of the top cover; supporting legs are fixedly arranged on the periphery of the bottom face of the shell layer, universal wheels are fixedly installed at the bottoms of the supporting legs, fixing blocks are fixedly arranged on the surfaces of the supporting legs, and braking mechanisms are fixedly installed on the top faces of the fixing blocks. According to the lepidolite leachate storage device, through the arrangement of the inner container layer, the polyurethane gel layer and the shell layer, the inner container layer and the shell layer conduct multiple protection on lepidolite leachate, the polyurethane gel layer can effectively absorb impact and vibration and provide good buffering protection for the inner container layer, and the polyurethane gel layer can also play a role in heat preservation; and the sealing effect is better through the three-layer arrangement.

The utility model discloses a lepidolite continuous roasting device which comprises a roasting mechanism and a rotary kiln installed on one side of the top of the roasting mechanism, a mixing and scattering mechanism is arranged on the top of the roasting mechanism, a feeding hopper is arranged on one side of the top of the mixing and scattering mechanism, and the roasting mechanism comprises a supporting bottom plate. A supporting column is fixedly installed on one side of the top of the supporting bottom plate, a quantitative discharging box is fixedly installed on the top of the supporting column, a top connecting pipe is fixedly installed on the top of the quantitative discharging box, a discharging motor is fixedly installed on the front face of the quantitative discharging box, and the output end of the discharging motor is fixedly connected with a first rotating disc. And a discharging rotating rod is fixedly installed on one side of the middle of the first rotating disc, the internal space of the quantitative discharging box can be evenly divided into a plurality of parts through partition baffles, a certain amount of ore can be stored in each space, and during discharging, the quantitative ore can be conveyed into the rotary kiln, so that the quantitative discharging function is achieved.

The invention relates to a full-particle-size flotation process method for improving the recovery rate of lepidolite through fine silt pretreatment. The full-particle-size flotation process method comprises the following steps that crushed lepidolite raw ore is subjected to ore grinding operation; conveying the ore grinding product to a first hydrocyclone; feeding an underflow product of the first hydrocyclone into a five-lamination high-frequency vibrating screen, returning an oversize product to a ball mill for regrinding, and removing iron from an undersize product; feeding the non-magnetic material subjected to iron removal into a spreading chute; carrying out shaking table roughing and re-selection on the distributed ore concentrate; feeding the cloth sliding tailings and the shaking table roughing and checking tailings into a first-section cyclone; overflow of the first-section cyclone is fed into a first deep-cone thickener; the deep cone underflow is added into a fine silt pretreatment tank, a dispersing agent is added into the fine silt pretreatment tank, uniform stirring and pretreatment are performed, and pretreated fine silt is obtained; and the first-section cyclone underflow and pretreated fine silt mixed ore pulp is added into a flotation stirring barrel, a matched collecting agent is added, and flotation operation is carried out. The method can improve the recovery rate of lepidolite, synchronously improve the whiteness of feldspar and the like.

This invention provides a method for stabilizing beryllium in lepidolite leaching residue, belonging to the field of lepidolite residue treatment technology. The method comprises the following steps: mixing lepidolite leaching residue with clay powder in a specific ratio, adding water, and pressing the mixture into bricks; firing the bricks in a muffle furnace; and then crushing, grinding, and testing the leaching toxicity of the fired clay bricks. This invention directly uses lepidolite leaching residue as raw material to prepare waste residue that can be safely discharged. It has low production costs, not only achieving resource recycling but also effectively stabilizing the excessive beryllium leaching toxicity in the residue. Furthermore, the resulting clay bricks can possess other excellent properties, meeting industry standards for waste residue discharge.

The application discloses a kind of lithium mica slag water-based epoxy quick repair mortar and preparation method thereof, it is related to the field of repair polymer mortar, comprising: aggregate, ordinary Portland cement, sulphoaluminate cement, water-based epoxy emulsion, defoaming agent, wetting agent, water reducing agent, deionized water, modified lithium mica slag / sepiolite fiber / lithium titanate whisker composite, modified amine water-based curing agent;Preparation method includes: water-based epoxy emulsion, wetting agent, deionized water, modified amine water-based curing agent, defoaming agent are prepared multi-component mixture;Aggregate, cement, modified lithium mica slag / sepiolite fiber / lithium titanate whisker composite, water reducing agent are mixed and stirred, multi-component mixture is added and mixed, and it is stirred together.The beneficial effects of the application are to improve the impermeability, crack resistance, dimensional stability, compressive strength, flexural strength, tensile bond strength and safety environmental protection of the mortar, and to speed up the repair speed.

The invention provides a battery material lithium carbonate production method and production equipment. The production method of the battery material lithium carbonate comprises the following steps: S1, crushing lepidolite ore, and grinding the crushed lepidolite ore into fine particles with the particle size of less than 75 microns; and S2, the ground lepidolite particles are put into flotation equipment, and lepidolite concentrate is obtained through a flotation technology. According to the production method of the battery material lithium carbonate, phosphoric acid and carboxylic acid groups are doped into the collecting agent, and the phosphoric acid groups in phosphoramidate molecules and lithium ions on the surface of lepidolite can form stable chemical bonds or complexes, so that the binding force of the collecting agent and the lepidolite is enhanced, the collecting capacity on lithium minerals is enhanced, the selectivity is higher, and the service life of the collecting agent is prolonged. And the surface of lepidolite has specificity, and the surface of gangue mineral has weak effect, so that the selectivity of the lepidolite concentrate can be better enhanced, the quality of the lepidolite concentrate is improved, and the foundation is laid for subsequent production of lithium carbonate with higher quality.

The invention discloses a combined desliming flotation process for iron lepidolite, which relates to the technical field of mineral separation and comprises the following steps: after primary semi-autogenous grinding is performed on raw iron lepidolite, grading is performed by hydrocyclones, settled sand enters a secondary ball-milling closed circuit for grinding, overflow is deslimed by a small-diameter hydrocyclone group, underflow is a deslimed product, and the underflow is a deslimed product; the overflow slime is separated through a vertical ring high-gradient high-intensity magnetic separator to obtain high-intensity magnetic tailings and middlings; and mixing the strong magnetic middlings with the desliming product, adding a flotation reagent, stirring, carrying out roughing, 2-3 times of concentration and 1-2 times of scavenging to obtain lepidolite concentrate, and combining the flotation tailings and the strong magnetic tailings into final tailings. The method is short in technological process and easy and convenient to operate, solves the problems that an existing technology is low in recovery rate, insufficient in concentrate grade and complex in process, is suitable for large-scale production, remarkably improves the lithium recovery rate and the concentrate grade, and has outstanding economic benefits.

The application provides a smelting slag valuable substance extraction device based on microbubble cavitation and an extraction process thereof. It relates to the technical field of solid waste treatment and comprises a base, a support frame, an extraction tank and a chemical treatment mechanism. The bottom of the support frame is fixed to the top of the base, the inner wall of the extraction tank is fixed to the inner wall of the support frame, and a top plate is sealingly installed on the top of the extraction tank through bolts. The valuable metal in the smelting slag is extracted by adopting a chemical combination pH value adjustment method. Through 'chemical characteristic precise regulation and control', the win-win of 'efficiency improvement' and 'environmental optimization' is realized. The resource utilization rate is improved, a low-cost and easy-to-promote technical path is provided for the greening of the lepidolite smelting industry, the design of the inner conical rotating cylinder is adopted, and the structure is gradually inclined from the outside to the inside. Compared with the stirring method, the sulfuric acid entering the auxiliary tank will fall on the rotating cylinder and gradually move to the middle position. In this way, local overheating can be avoided.

The invention discloses a method for directly extracting lithium by carbon-assisted sulfating roasting of lepidolite, which comprises the following steps: 1) mixing lepidolite, concentrated sulfuric acid and water, and uniformly stirring to obtain slurry; 2) adding an iron source and a carbon source into the slurry, and uniformly stirring to obtain a mixed material; 3) roasting the mixed material to obtain roasted clinker; (4) the roasted clinker is subjected to a water leaching reaction, and water leaching liquid and water leaching residues are obtained after filtering; and (5) the water leaching residues obtained in the step (4) are subjected to an alkaline leaching reaction, and a Na2SiO3 solution and Fe / Al multi-element oxide residues are obtained after filtering. By introducing carbon and iron oxide to assist sulfating roasting of lepidolite, the decomposition temperature of iron-aluminum sulfate is greatly reduced, and meanwhile it is ensured that lithium-potassium-rubidium sulfate is not decomposed. According to the method, the selective leaching rate of valuable metal is remarkably increased, generation of silicate is inhibited, the roasting slag is converted into Fe / Al oxide and SiO2 with utilization value, efficient lithium extraction and comprehensive utilization of resources are achieved, operability is enhanced, and application and popularization are easy.

The invention provides a water pollution treatment device and a method for extracting lithium from lepidolite and recovering sodium sulfate. Relates to the field of water pollution treatment, in particular to a water pollution treatment device which comprises an evaporation crystallizer arranged on the ground. According to the water pollution treatment device and the method for extracting lithium from lepidolite and recovering sodium sulfate, three-time washing sewage is used as a cooling medium, water vapor generated by the evaporation crystallizer is converted into pure water through low-temperature condensation, and cyclic utilization of the pure water is achieved while sewage treatment is conducted; the third-time washing sewage absorbs heat in the water vapor condensation process to achieve preheating, the energy efficiency is improved, efficient potassium sulfate recovery is achieved, dependence on external raw materials is reduced, and the economic benefits are improved, the third-time sewage is input into an evaporation crystallizer or a mixing box through an electromagnetic valve, and the concentration of a third-time near-pure water washing sewage solution is extremely low; evaporation is carried out after washing sewage is mixed, and the problems that violent bumping easily occurs due to direct evaporation, heat transfer is unstable, and effective crystals are difficult to form are avoided.

The invention belongs to the technical field of hydrometallurgy and comprehensive utilization of resources, and relates to a method for extracting lithium from lepidolite at normal pressure and high efficiency based on synergistic activation and targeted impurity removal. The method comprises the following steps of mechanochemical activation-pre-deconstruction, hydrochloric acid normal-pressure reinforced leaching, fluorine and aluminum synergistic precipitation and recycling, deep removal of iron, calcium and magnesium targeted precipitation and lithium recovery. According to the method disclosed by the invention, the lithium extraction process is optimized, and the lepidolite concentrate is subjected to crystal pre-deconstruction by combining mechanical and chemical activation, so that extremely high reaction activity is created for subsequent acid leaching reaction under normal pressure; then, fluorine, aluminum and iron are removed by accurately controlling reaction conditions, and finally, a composite precipitator is added to deeply remove calcium and magnesium. The lithium extraction and impurity removal method is simple in technological process, high in lithium recovery rate, low in impurity content and wide in applicability.