324 results about "Lepidolite" patented technology

The invention provides an unfired lightweight aggregate with high lithium slag doping amount and a method for synergistically preparing the unfired lightweight aggregate from lepidolite slag and lepidolite slag. The unfired lightweight aggregate with high lithium slag doping amount is prepared from the following raw materials: lithium slag and a functional additive, the lithium slag material comprises lepidolite slag and spodumene slag; the functional additive comprises a binder, an exciting agent and a mineralizing agent. Through cooperation of the lepidolite slag and the spodumene slag, the dry basis doping amount of the lithium slag in the unfired lightweight aggregate is increased to 80% or above, the cement doping amount is reduced to 15% or below, introduction of active components such as fly ash is not needed, the cement doping amount is low, the curing time is short, and high-doping-amount resource utilization of the lithium slag is achieved; the unfired lightweight aggregate has relatively high cylinder compressive strength and relatively low water absorption rate and bulk density, and meanwhile, efficient solidification of beryllium element is effectively realized in combination with a mineralizing agent; the material has excellent comprehensive performance and can be widely applied to the fields of building industry and the like.

The invention relates to a method for efficiently extracting lithium by roasting lepidolite at low temperature by using composite organic acid. The invention relates to a method for efficiently extracting lithium by roasting lepidolite at low temperature by using composite organic acid, which comprises the following steps of: adding an activating agent into lepidolite concentrate, and pre-activating to obtain activated lepidolite concentrate powder; the lepidolite concentrate powder and a composite organic acid roasting agent are mixed, acidified and roasted, and a roasted product is obtained; adding water into the roasted product for leaching, and carrying out suction filtration to obtain a lithium-containing leachate; the composite organic acid roasting agent at least comprises methanesulfonic acid. According to the method, the problem that the lithium ion extraction efficiency is low due to the fact that the TOT layered structure in the lepidolite is difficult to damage is solved, and the problem that the lithium ion extraction efficiency is low due to the fact that Si-O bonds with high bond energy in an existing lepidolite crystal framework are difficult to dissociate is also solved.

The invention provides an alkali metal group ion selective permeable membrane, a preparation method and a lithium, rubidium and cesium extraction method and system, and the membrane is prepared by taking polyphenylene sulfide, Zr (HPO4) 2 and a high-molecular polymer adhesive as raw materials through mixing, fibration treatment and compression molding processes. Based on the weak dipole adsorption characteristic between the sulfur position of high-crystallization polyphenylene sulfide and alkali metal cations, efficient screening of monovalent alkali metal ions (Li < + >, Rb < + > and Cs < + >) and multivalent impurity ions (Mg < 2 + >, Al < 3 + > and Fe < 2 + >) is achieved, and the method can be used for extracting rubidium and cesium. The ion selective permeable membrane has excellent mechanical properties, high separation efficiency and corrosion resistance, and is low in production cost; and finally, the multiple targets of lepidolite leaching liquid impurity removal and lithium rubidium cesium synergistic extraction are achieved.

The invention provides a clay type lithium ore-lepidolite-spodumene continuous induction suspension cascade roasting lithium extraction method, which comprises the following steps: mixing clay type lithium ore and lepidolite concentrate for pelletizing, then mixing with spodumene concentrate to obtain a clay type lithium ore-lepidolite-spodumene mixed material, and carrying out continuous induction suspension cascade roasting on the clay type lithium ore-lepidolite-spodumene mixed material to obtain the clay type lithium ore-lepidolite-spodumene powder. And carrying out gradient high-temperature roasting, low-temperature acidizing roasting and water leaching to obtain a lithium leaching solution. The leaching rate of lithium in the lithium leachate obtained through the lithium extraction method is larger than or equal to 90%, the problem that existing spodumene roasting crystal transformation temperature is high can be effectively solved, meanwhile, the extraction and utilization rate of lepidolite and clay type lithium ore is increased, integrated extraction and utilization of lithium resources are achieved, and the method is simple in process, low in energy consumption, low in cost, easy to industrialize and suitable for industrial production. Good application prospects are realized.

The invention provides a method for extracting lithium, rubidium and cesium through strengthened roasting of lepidolite and preparing lithium, rubidium and cesium salt, and belongs to the technical field of lithium, rubidium and cesium extraction.The method comprises the steps that lepidolite, a carbon / sulfur additive and chlorine salt are subjected to ball milling, roasting and grinding, and roasted sand is obtained; through thermodynamic analysis on the lepidolite, after the carbon / sulfur additive is introduced, the Gibbs free energy of the reaction of the lepidolite and the additive is reduced, the reaction trend is improved, and in the roasting process, ions such as sodium, potassium and calcium in chlorine salt and the carbon / sulfur additive are replaced in a similar isomorphic manner, so that lithium, rubidium and cesium are leached more easily; in the process of intensifying roasting by introducing the carbon / sulfur additive, the use amount of the chlorine salt additive is reduced by 10-25%, potassium-sodium mixed salt and calcium oxalate are recycled, the recycling rate is greater than 50%, and the leaching residue amount is reduced by 30-40%; and the carbon / sulfur additive can directionally promote the reaction of the calcium salt additive and the lepidolite and convert the calcium salt additive into dicalcium silicate, so that the leaching residues obtained in the subsequent leaching process are easier to recycle.

The invention discloses a process for extracting lithium from lepidolite through low-temperature roasting, which comprises the following steps: uniformly mixing lepidolite mineral powder with ferrous sulfate, sodium sulfate and calcium oxide, roasting at 800-900 DEG C for 1-2 hours, and cooling to room temperature to obtain a roasted material; adding water into the roasted material to prepare slurry, performing wet grinding to obtain ball-milled slurry, performing water leaching on the slurry, and performing suction filtration to obtain lithium sulfate leaching liquid and leaching residues; treating the leaching solution to obtain a lithium precipitation pre-solution, and further carrying out lithium precipitation reaction to obtain a lithium carbonate crude product; and finally, mixing the crude lithium carbonate product with deionized water, heating, stirring, washing and carrying out solid-liquid separation to obtain a battery-grade lithium carbonate product. The lithium extraction process of the lepidolite can be realized under the roasting condition of 800-900 DEG C, and the roasting temperature is effectively reduced; meanwhile, on the basis of the low-temperature roasting condition, Li2SO4 and LiKSO4 can still be extracted to the maximum extent, and release of SO2, SO3 and HF is avoided.

The invention discloses a method for extracting lithium by coupling roasting of lepidolite and spodumene, and belongs to the technical field of metal smelting, the method comprises the following steps: calcining a mixture to obtain a roasted material, and then leaching the roasted material to obtain a lithium-containing solution and slag; the mixture comprises mixed stone and a roasting aid, and the mixed stone comprises lepidolite and spodumene. According to the method, the lepidolite and the spodumene are subjected to coupled calcination, and the reaction activity of the lithium element is improved through fluorine in the lepidolite, so that the roasting temperature and the doping amount of a roasting auxiliary agent required by phase transformation of the lepidolite and the spodumene are reduced, and the energy consumption and the generation of slag in the lithium extraction process are further reduced.

The invention provides a high-selectivity flotation method for micro-fine particle lepidolite containing rubidium and cesium, which comprises the following steps: levigating raw lepidolite ore, and desliming to obtain a flotation material and slime; adding sodium hexametaphosphate and a collecting agent HT8-01 into the flotation material, stirring, and roughing to obtain lepidolite rough concentrate and flotation tailings I; a collecting agent HT8-01 is added into the flotation tailings I for two times of scavenging, flotation tailings and two scavenging middlings are obtained, and the scavenging middlings are sequentially returned to the upper layer for operation; sodium hexametaphosphate is added into the lepidolite rough concentrate for two times of concentration, lepidolite concentrate and two concentrated middlings are obtained, and the concentrated middlings are sequentially returned to the upper layer for operation; the collecting agent HT8-01 is obtained by mixing octadecylamine and sodium dioctyl sulfosuccinate according to the mass ratio of 5: 3. According to the method, the separation effect of the rubidium-cesium-lithium-containing mica and gangue minerals such as quartz and feldspar is improved, the problems that foam is too stable, the viscosity is too high and the size is too large are solved, and high-selectivity separation of the micro-fine-particle rubidium-cesium-lithium-containing mica is achieved.

A mineral separation method for separating and enriching tantalum, niobium and zinnwaldite from feldspar tailings, comprising the following steps: Step 1: Predispersion; Step 2: Vibration classification; Step 3: Strong dispersion; Step 4: Magnetic rough separation; Step 5: Magnetic cleaning; Step 6: Strong dispersion; Step 7: Flotation rough separation; Step 8: Flotation cleaning; Step 9: First pressure filtration; Step 10: Magnetic scavenging; Step 11: Second pressure filtration; Step 12: Flotation scavenging. Compared with the prior art, the advantages of the present invention are as follows: (1) Using a high-speed shearing machine for dispersion can greatly improve the dispersion effect and is beneficial to the subsequent separation of various minerals; Using a high-intensity slurry magnetic separator can effectively remove slime, which is beneficial to the further flotation separation of tantalum and niobium minerals from zinnwaldite and improve the recovery rate; Using a flotation column for the separation of tantalum and niobium ore and zinnwaldite has a large processing capacity, a high recovery rate and environmental neutrality, which is beneficial to environmental protection.

The invention belongs to the technical field of lithium-containing mineral treatment, and relates to a method for selectively extracting lithium from lepidolite. The method mainly comprises the following steps: carrying out roasting defluorination treatment on lepidolite, and grinding to obtain a lepidolite defluorination roasting material in which the mass content of lithium is 0.8-1.5% and the mass content of aluminum is 20-30%; carrying out acid leaching treatment on the lepidolite defluorination roasting material by using a first acid solution, and carrying out solid-liquid separation to obtain a leaching solution and leaching residues; adjusting the pH value of the leachate to 2-3 by adopting a neutralizer, and then adding a mixture of the neutralizer and benzoic acid into the leachate to obtain aluminum benzoate precipitate and aluminum-removed liquid; adding the aluminum benzoate precipitate into a second acid solution, dissolving, and carrying out solid-liquid separation to obtain regenerated benzoic acid and an aluminum-rich solution; and cooling the aluminum-rich solution to obtain an aluminum salt and a recyclable acid solution. According to the method, efficient separation of lithium and aluminum in lepidolite can be achieved, benzoic acid and the acid solution can be recycled, and the lithium extraction cost can be effectively reduced.

The invention relates to the technical field of pollution-free treatment of industrial waste residues, in particular to a treatment method of thallium-containing tailings obtained by extracting lithium from lepidolite. The method comprises the following steps: mixing the lepidolite lithium extraction thallium-containing tailings with an acid solution, sequentially carrying out three times of stirring reaction, mixing with nano-iron, adjusting the pH value to 10.0, and carrying out adsorption and solid-liquid separation to realize treatment of the lepidolite lithium extraction thallium-containing tailings. According to the method, efficient removal of thallium in the tailings (the leaching toxicity is smaller than 0.1 mg / L, and the removal rate is larger than 99%) is achieved through the acid rinsing-nano iron adsorption coupling technology, meanwhile, a wastewater closed-loop circulation system is constructed, and the treatment cost of each ton of slag is reduced to 300 yuan or below.

The invention discloses a jade-color luxury-effect ceramic rock plate and a preparation method thereof. The ceramic rock plate sequentially comprises a green body, a transparent cover glaze layer, a jade texture pattern layer, a composite dry particle layer, a first protective glaze layer, a transparent dry particle layer and a second protective glaze layer from bottom to top, the composite dry particle layer is prepared from the following raw material components in parts by weight: 65-69 parts of baddeleyite, 5-7 parts of lepidolite, 10-15 parts of opal, 3-5 parts of kyanite and 1-5 parts of udravite; the anti-reflection dry granules are prepared from the following raw material components in parts by weight: 20 to 25 parts of albite, 25 to 30 parts of quartz, 14 to 16 parts of calcite, 8 to 12 parts of wollastonite and 13.5 to 15.5 parts of zinc oxide. The ceramic rock plate can truly restore the randomness, the layering sense and the multicolor interweaving effect of jade seeping, the mild texture and the natural gloss of the surface of a product are improved, and the luxury effect of jade seeping is achieved.

The application discloses a kind of multi-element combination collector and its application in low-grade lepidolite flotation, belong to mineral processing technical field.The multi-element combination collector provided by the application is composed of cationic amine collector, anionic promoter and long-chain anionic collector, which significantly improves the reaction activity of the collector and the capture behavior of the mineral particles during the flotation process, reduces the foam viscosity and increases the fluidity, effectively solves the problem of overstable foam and the difficulty of flotation separation of different silicate minerals under acidic conditions, reduces environmental pollution and equipment corrosion, and also strengthens the hydrophobic floating behavior of lepidolite surface, resulting in high grade Li2O concentrate, further realizing the clean recycling of low-grade lepidolite resources.

The utility model relates to the technical field of lepidolite sorting, and particularly discloses a lepidolite sorting device which comprises a guide groove body and a plurality of sorting boxes arranged on one side of the guide groove body. A grading cavity is formed in the grading box, a rotating rod extending into the grading cavity is installed at the top of the grading box, a foaming stirring frame is installed on the rotating rod, the top end of the rotating rod extends to the top of the grading box to be connected with a driven bevel gear, the top of the grading box is connected with a fixing frame, and a driving rod is rotationally connected to the fixing frame. The driving mechanism works to drive the driving rod and the center rod to rotate synchronously, the driving bevel gear drives the driven bevel gear and the rotating rods to rotate synchronously, the grading cavity is inflated, the bubbling stirring frame stirs materials in the grading cavity, and lepidolite minerals are attached to bubbles and float to the surface of ore pulp along with the bubbles. The center rod drives the stirring frame to rotate, so that foam is stirred into the guide groove body, stirring and stirring are continuous, and the arrangement of a plurality of drives is reduced.

The invention provides equipment and a method for preparing a lepidolite slag planting matrix for agricultural cultivation, and relates to the technical field of agricultural cultivation, the equipment comprises an elution pool, an elution mechanism and a bubble wave-blowing mechanism; a rotating shaft is rotationally connected to the inner side of the elution pool, two key blocks are connected to a surface key groove of the rotating shaft, an elution cylinder is connected to surfaces of the two key blocks through key grooves, six punching baffles are arranged on the inner wall of the elution cylinder in an annular array mode, and a mounting base is fixedly arranged on the front face of the elution pool. According to the scheme, rotation of a rotating shaft can drive a rotating disc and a driving block to rotate, then an annular frame drives two pistons to move left and right, gas in a compression cylinder is compressed into an elution pool, dense small bubbles appear in elution water, and through turbulent flow and shearing force generated by bubble breakage, the gas in the elution water is purified. Salt crusting on the surface of the slag is secondarily damaged, so that the elution time of the lepidolite slag is shortened, and the preparation efficiency of the planting substrate is improved.

The invention discloses a method for strengthening flotation recovery of micro-fine particle rubidium and cesium co-associated lepidolite. The method mainly comprises the following steps: blending the micro-fine particle rubidium and cesium co-associated lepidolite into ore pulp by using micro-nano bubble deionized water; sequentially adding a regulating agent and an anion-cation combined collecting agent, fully stirring, and regulating the pH value of the ore pulp; and a flotation machine is used for sorting the evenly-stirred ore pulp, and rubidium and cesium co-associated lepidolite concentrate is obtained. According to the flotation result, on the premise that the using amount of the collecting agent is the same, the recovery rate of the cavitation micro-nano bubble flotation is increased compared with that of conventional bubble flotation, and the flotation recovery rate of the micro-fine particle rubidium-cesium co-associated lepidolite which is an important metal mineral resource can be remarkably increased through the method; and efficient recovery of the rubidium-cesium carrier minerals is effectively realized.

The invention provides a device for extracting cesium from lepidolite and preparing cesium formate by a preparation system of cesium formate, which comprises: an extraction section, which comprises a plurality of first high-speed centrifugal extractors connected in series, and a first extraction inlet of the first high-speed centrifugal extractor of the last stage is introduced with a liquid to be extracted; the to-be-extracted liquid is leached frozen clear liquid of lepidolite, and the frozen clear liquid is alkaline and comprises cesium, rubidium, sodium, potassium and lithium ions; the t-BAMBP is diluted by adopting ESCAID 110 as an extraction agent, the concentration of the extraction agent is 0.4-0.6 mol / L of t-BAMBP, and the O / A ratio in the extraction section is 1: (1.8-2.0); the washing section comprises a plurality of second high-speed centrifugal extractors which are connected in series; the back extraction section comprises a third high-speed centrifugal extractor, and cesium bicarbonate back extraction post-liquid flows out of a first back extraction outlet of the third high-speed centrifugal extractor; the oil removal section is used for removing oil from the cesium bicarbonate back-extraction post-liquid; and the evaporation and concentration section is used for introducing formic acid for neutralization reaction to form a cesium formate solution after oil removal, and then evaporating and concentrating the cesium formate solution to obtain the final cesium formate solution.

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 utility model relates to the technical field of calcium removal of lithium extraction washing water pipes, and provides a device for preventing a lithium extraction washing water pipe of lepidolite from forming calcium, which comprises a stirring tank, a feeding pipe, a water inlet pipe, a washing water pipe, a booster pump, a calcium removal device, a stirring device and a supporting device, the stirring tank is arranged on the supporting device, the feeding pipe is arranged on the upper side of the stirring tank, the water washing pipe is arranged on the lower side of the stirring tank, the booster pump is arranged on the water washing pipe, and the water inlet pipe is arranged at the position, close to the stirring tank, of the water washing pipe. By controlling opening and closing of the first valve and the second valve, the calcium removal balls are added into the water washing pipe through the ball inlet pipe, the operation is repeated, the calcium removal balls are continuously put into the water washing pipe, the flowing speed of clear water and the calcium removal balls is increased through work of the booster pump, and the calcium removal balls have specific surface protrusions; the device is used for increasing physical friction and impact on the inner wall of a pipeline when the device moves in the pipeline, removing scaling is helped, and the cleaning effect is achieved.

The invention provides a method for separating and extracting lithium carbonate from a low-lithium-content mica leaching solution. The method comprises the following steps: crushing a lepidolite roasting clinker, and leaching at normal temperature; defluorination and suction filtration are carried out on the leachate; adjusting the pH of the filtrate with lime water to remove magnesium; adding sodium carbonate into filtrate to remove calcium; extracting and separating to obtain a lithium-loaded organic phase; performing carbon dioxide reverse extraction on the lithium-loaded organic phase, removing calcium and magnesium from a reverse extraction water phase through resin, and performing pyrolysis to prepare lithium carbonate; and when potassium and sodium ions in the raffinate reach a certain concentration, carrying out evaporative crystallization to produce a potassium and sodium mixed salt byproduct. According to the method, the mica roasting clinker is leached with a large amount of water, the leaching rate of lithium is guaranteed, calcium oxide and sodium carbonate are adopted for impurity removal, the pH of a solution is increased, the extraction driving force is met, and the use amount of alkali liquor is reduced; after extraction, a loaded organic phase is subjected to carbon dioxide reverse extraction, introduction of a large amount of sodium carbonate during lithium precipitation is avoided, and cost and generation of sodium sulfate are reduced; the clinker is repeatedly leached by the raffinate, and the raffinate enters an evaporation desalting system, so that the energy consumption is low, and the production cost is low.

The invention relates to a method for deeply removing beryllium and thallium from lepidolite smelting slag and obtained purified lithium slag, and the method comprises the following steps: (1) mixing the lepidolite smelting slag with water to obtain mixed slurry; (2) adding an acid solution into the mixed slurry obtained in the step (1) until the pH value is 3-3.5, then adding a complexing agent, uniformly mixing, leaching, and carrying out first solid-liquid separation to obtain a beryllium and thallium-containing leachate and lithium slag; and (3) sequentially adding a precipitator and an adsorbent into the beryllium and thallium-containing leaching solution obtained in the step (2), and carrying out second solid-liquid separation to obtain a purified leaching solution and beryllium and thallium-containing waste residues. The method is easy and convenient to operate, high in reaction rate and stable in beryllium and thallium removal effect, low-cost, efficient and deep removal of beryllium and thallium toxic components in the lepidolite smelting slag is achieved, and the lithium slag obtained after deep removal of beryllium and thallium can be directly applied to the large-scale absorption field of building materials, roadbed materials and the like.

The invention provides a lepidolite flotation wastewater treatment device and a flotation process, and relates to the technical field of wastewater treatment, the lepidolite flotation wastewater treatment device comprises an oxidation reaction tank, a multi-point feeding mechanism and a swing mechanism; the multi-point feeding mechanism comprises a mounting plate, a liquid outlet pipe and a two-way threaded screw rod, the two sides of the mounting plate are fixedly connected with the inner wall of the oxidation reaction tank, a sliding rail is fixedly arranged at the top of the mounting plate, and a moving seat is slidably connected to the surface of the sliding rail. According to the scheme, when the amidoxime lepidolite-containing flotation wastewater is treated, ferrous sulfate and hydrogen peroxide are added into the flotation wastewater, so that oximido and amino of amidoxime are destroyed, complexed heavy metals are released, macromolecular organic matters are degraded, the heavy metals are ensured to be completely free, and the heavy metals in effluent are prevented from exceeding the standard; in addition, the hydrogen peroxide is gradually added in a multi-point mode, bumping caused by local over-concentration is avoided, inner side spraying is adopted during spraying, and bumping of the liquid level due to the fact that the hydrogen peroxide is directly sprayed downwards and settles to the bottom of the pool under the action of gravity is avoided.

The invention relates to the field of ore flotation, and discloses a method for reducing lepidolite flotation froth and improving lepidolite recovery rate, which comprises the following steps: S1, ore grinding and grading: sequentially carrying out coarse crushing, intermediate crushing and fine crushing on spodumene and lepidolite complex disseminated mixed ore raw ore, grinding ore by adopting a ball mill, controlling the ore grinding concentration to be 70-80% and the ore grinding time to be 4-6 minutes, and carrying out ore grinding and grading; the ore grinding classification technology is optimized, the ore grinding classification technology is optimized, the proportion of-0.074 mm fraction in the ore grinding product reaches 65%-75%, the ore grinding product is classified through the hydrocyclone, coarse fraction returns to the ball mill to be ground again, and fine fraction enters the follow-up flotation operation, flotation froth is reduced, and by optimizing the ore grinding classification technology, the influence of fine particles generated by over-grinding on the froth stability is reduced; a special pretreatment regulator is added, so that the flotation activity of gangue minerals is inhibited, and unnecessary foam is reduced; and the formula and dosage of flotation reagents are adjusted, and foam increase caused by excessive reagents is reduced.

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.

The invention discloses a technological method and system for extracting lithium from lepidolite through fluidized roasting and water leaching, and belongs to the technical field of treatment methods of lithium-containing minerals. The method comprises the following steps: S1, mixing lepidolite mineral powder with a sulfate auxiliary agent to prepare a roasted raw material, adding a fluorine fixing auxiliary agent, and mixing to prepare a mixture; s2, the mixture and fluidizing gas are subjected to preheating treatment; s3, the preheated mixture and fluidizing gas are fed into a fluidized bed roasting furnace to be subjected to a fluidized roasting reaction, and roasting clinker, a fluorine fixing auxiliary and thallium-containing tail gas are obtained through separation; s4, the thallium-containing tail gas is subjected to cyclone preheating and wet defluorination and reacts with metal sulfide, a gaseous thallium compound is removed, and solid thallium sulfide is prepared; and S5, cooling the roasted clinker, performing water leaching, filtering, neutralizing and precipitating lithium, so as to obtain lithium carbonate and leaching residues. The method is more environmentally friendly and efficient, the lithium smelting slag amount can be remarkably reduced, and fluorine recycling is achieved.

The present application is to provide a harmless treatment method for removing thallium and beryllium from lithium residue, which overcomes the above-mentioned difficulties. The method uses waste lithium residue after lithium extraction from lepidolite as the main raw material, adopts a combination of ball milling machinery and chemical treatment with chemical reagents, further grinds and crushes the waste lithium residue, increases the surface area of the waste lithium residue to make the subsequent stabilization reaction more thorough, releases the soluble salts of potassium, sodium, beryllium and thallium wrapped by the waste lithium residue, and makes them dissolve into water during washing. At the same time, the mechanical ball milling can convert a part of insoluble lithium into soluble lithium to increase the recovery rate of metallic lithium. Through water washing and spray washing, harmful elements such as beryllium and thallium in the waste lithium residue are removed, so that the treated lithium residue meets the standards for beryllium and thallium. The content of beryllium and thallium in the treated lithium residue is as follows: Tl < 0.01 mg / L, Be < 0.02 mg / L. It is beneficial to resource utilization, more environmentally friendly and safer, and realizes the reuse of waste lithium residue.

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.

The invention discloses an impurity removal device for a lepidolite reselection process, and relates to the technical field of lepidolite reselection impurity removal, the impurity removal device comprises a water supply device, an ore supply device, a material collection device and a support, the top of the support is provided with a power device, the power device is connected with a shaking table, and one side of the shaking table is adjacently provided with an ore feeding groove and a flushing groove; the ore feeding groove conveys ore sand through an ore supply device, the flushing groove provides water through a water supply device, the shaking table shakes through a power device, and the ore sand is collected through a material collecting device at the bottom of the shaking table. By arranging the power device and the shaking table, the width of the strip-shaped groove is rapidly adjusted according to the particle size of ore sand, reselection and impurity removal of the ore sand with various particle sizes are facilitated, meanwhile, the water flow of the surface of the bed surface is changed, waste of water is synchronously reduced, and the environmental protection property of the device is improved; and the inner wall of the strip-shaped groove is quickly scraped and swept, and the self-cleaning capacity of the device is improved.

The invention discloses a combined reagent for reducing foam stability of amine collector flotation lepidolite and a preparation method of the combined reagent, and belongs to the technical field of mineral processing. The combined reagent for reducing the flotation froth stability of the amine collector comprises the following raw materials: lauryl amine, a solubilizer and span. Compared with a conventional cationic flotation collecting agent, the combined reagent provided by the invention has the advantages that on the premise of ensuring a good flotation index of lauryl amine, the problem that lauryl amine foam is sticky can be remarkably improved, the foam stability is reduced, and the half-life period of standing defoaming of flotation foam is greatly shortened. In addition, the combined agent is stable in chemical composition and physicochemical property, high in collecting capacity, efficient and low in consumption, and has the advantages of being easy to prepare and low in price.

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.