231 results about "Spodumene" patented technology

The invention relates to the technical field of sewage treatment, and discloses spodumene flotation tailing water treatment equipment which comprises a plate-and-frame filter press and a feed flow real-time control system electrically connected with the plate-and-frame filter press. According to the system, a slurry characteristic coefficient, a power supply coefficient, a dynamic matching coefficient and a filter cloth state coefficient are respectively obtained in real time through a slurry state evaluation module, a power evaluation module, a process dynamic matching module and a filter cloth state evaluation module. And dynamically calculating and adjusting the target feeding flow by the feeding flow adjusting and controlling model according to the coefficients. According to the invention, through multi-parameter collaborative sensing and intelligent matching, the dynamic adaptation of the feed flow, the slurry characteristics, power supply and the state of the filter cloth is realized, the technical problems of poor adaptability, control lag, easy damage of the filter cloth and high energy consumption of the traditional plate-and-frame filter press under complex working conditions are effectively solved, and the treatment efficiency and the operation stability are remarkably improved.

The invention provides equipment and a process for extracting lithium from lepidolite frame residues and synthesizing urea gypsum, and relates to the technical field of solid waste resource recycling, the equipment comprises a reaction tank, a sealing plate, a reciprocating motion mechanism and a multi-point detection mechanism; the reciprocating motion mechanism comprises a bidirectional threaded lead screw and a threaded block, the bidirectional threaded lead screw is transversely and rotatably connected to the inner wall of the reaction tank, the threaded block is in threaded connection with the bidirectional threaded lead screw, and the bottom of the threaded block is slidably connected with a guide seat. According to the scheme, when the top of a rotating wheel is in contact with a concave position of a convex plate, a rotating seat can drive a sliding rod and a PH detector to move upwards under the action of a spring, so that the bottom end of the PH detector is separated from filtrate, and a plurality of convex parts are arranged on the convex plate, so that the filtrate is subjected to multi-point real-time detection; lithium ion loss caused by co-precipitation of lithium, iron and aluminum due to over-high local pH value of the filtrate is avoided, and the concentration of the lithium solution is effectively improved.

The invention provides a method for extracting lithium by leaching spodumene. The method comprises the following steps: roasting a mixture of spodumene concentrate and a roasting aid to obtain roasted clinker; and under the condition that an external field is applied, acid leaching is conducted on the roasted clinker, solid-liquid separation is conducted, and lithium leaching liquid and spodumene smelting slag are obtained. According to the method, roasting transformation is optimized through a process route of combining one-step additive roasting transformation with external field enhanced leaching lithium extraction, the process flow is shortened, meanwhile, external field synergistic enhanced leaching is adopted, and efficient leaching of the lithium element in spodumene and selective leaching of the lithium element are achieved.

The invention provides a method for preparing analcime from lithium slag, and belongs to the field of zeolite preparation. The method comprises the following steps: acid pickling and impurity removal: mixing lithium slag with an inorganic acid solution, stirring and reacting at 50-70 DEG C for 0.5-3 hours, and then filtering, washing and drying in sequence to obtain impurity-removed lithium slag; activation: mixing the impurity-removed lithium slag with a NaOH solution, carrying out continuous stirring reaction at 75-95 DEG C for 35-72 hours, and aging for 10-30 minutes to obtain a mixture colloid; and crystallization: carrying out hydrothermal reaction on the mixture colloid at 110-130 DEG C for 24-72 hours, and then sequentially filtering, washing and drying to obtain the analcime crystal material. According to the method, the lithium slag obtained after leaching and lithium extraction of spodumene by a sulfuric acid method is taken as a raw material, and on the basis of not calcining and activating and not additionally adding the raw material, the NaOH concentration, the activation temperature and time during activation and the temperature and time during hydrothermal reaction are controlled, so that the high-purity analcime crystal can be obtained.

A high-strength, highly transparent nanocrystalline glass, a preparation method therefor, and a use thereof. The high-strength, highly transparent nanocrystalline glass uses precursor minerals mainly comprising synthetic aluminum-rich feldspar-like ceramic glass material, β-spodumene material, cordierite material, synthetic β-dicalcium silicate material, and magnesium aluminum spinel material for the main body of a feldspar-like matrix glass having a stable structure. Ultrafine zirconia powder having a particle size of less than 10 nm is used as a nucleating agent and microcrack damping and pinning agent, to control the formation of nanocrystals smaller than 100 nm in the glass body formed after melting. The volume percentage content of the nanocrystals is 50%-95%, and the nanocrystals together with the matrix glass form a high-strength, highly transparent nanocrystalline glass having a uniform microstructure. The obtained nanocrystalline glass has high hardness, high fracture toughness and high light transmittance, and is suitable for manufacturing various types of optical glass.

The present invention provides a method for preparing analcime using lithium slag, and belongs to the field of zeolite preparation. The method comprises the following steps: acid washing and impurity removal: mixing the lithium slag with an inorganic acid solution, stirring and reacting at 50-70°C for 0.5-3h, and then filtering, washing, and drying in sequence to obtain the lithium slag after impurity removal; activation: mixing the lithium slag after impurity removal with a NaOH solution, stirring and reacting continuously at 75-95°C for 35-72h, and aging for 10-30 min to obtain a mixture colloid; crystallization: hydrothermally reacting the mixture colloid at 110-130°C for 24-72h, and then filtering, washing, and drying in sequence to obtain analcime crystal material. The method uses lithium slag after lithium extraction by leaching of spodumene sulfuric acid method as raw material, and can obtain high-purity analcime crystals by controlling the NaOH concentration, activation temperature and time during activation, and the temperature and time during hydrothermal reaction without calcination activation and without adding raw materials.

The utility model discloses a lepidolite spodumene roasting flue gas multi-pollutant efficient treatment device which comprises a high-temperature dust removal and denitration integrated tower, a fan, a flue gas deacidification tower and a flue gas heat exchanger, the high-temperature dust removal and denitration integrated tower is communicated with a kiln tail of a roasting kiln, and a cooling section of the flue gas heat exchanger is communicated with the high-temperature dust removal and denitration integrated tower and the fan. Flue gas is subjected to heat exchange in the cooling section and then conveyed to the flue gas deacidification tower through a fan, a gas outlet of the flue gas deacidification tower is communicated with the heating section of the flue gas heat exchanger, the flue gas is subjected to heat exchange with flue gas of the high-temperature dust removal and denitration integrated tower in the flue gas heat exchanger to be heated, and the flue gas is discharged through a chimney communicated with the heating section on the flue gas heat exchanger. The device disclosed by the utility model can be used for cooperatively treating various pollutants including dust, SO2, HF, HCL, nitrogen oxides, dioxin, heavy metals and the like, so that high-efficiency treatment on flue gas is realized, and good economic benefits 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 present invention belongs to the technical field of glass manufacturing. Provided are a recipe of glass capable of carbon emission and a preparation method for the glass capable of carbon emission. The recipe comprises the following raw material components in percentage by mass: 53-60% of quartz sand, 12-18% of wollastonite, 5-12% of albite, 0.5-2% of spodumene, and 15-20% of NaOH; on this basis, 2-5% of water and 5-10% of a silica sol binder are additionally added to ensure the humidity and good adhesive effect of a compounded material. The raw materials are fully mixed and then fed to an extrusion molding machine, the pressure in the extrusion molding machine is controlled to be 50-150 MPa, and extrusion is performed to form spherical or flake-shaped pellets having a diameter of 5-15 mm; and the granulated and molded pellets of the compounded material are then preheated to 500°C and put into a kiln for melting to obtain glass capable of carbon emission. The preparation method can improve the utilization rate of the compounded material, shorten the melting time, reduce the melting temperature, improve the quality of glass melting, reduce the unit energy consumption, and reduce the carbon emission.

The invention discloses a complex lithium ore or lithium-containing waste pretreatment low-temperature transformation roasting lithium extraction method which comprises the following steps: uniformly mixing one or more of petalite concentrate, spodumene concentrate, lithium chinastone and lithium-containing glass waste with aluminum electrolysis overhaul slag, fluoride and concentrated sulfuric acid, and then carrying out low-temperature calcination pretreatment; pre-treated materials are obtained; carrying out transformation roasting on the pretreated material to obtain a transformed material; then, uniformly mixing the transformed material with concentrated sulfuric acid, and performing low-temperature acidification calcination to obtain an acidified material; and finally, placing the acidified material in water, carrying out water leaching, and carrying out solid-liquid separation to obtain a lithium leachate, according to the technical scheme, collaborative consumption of multiple lithium resources can be achieved, the comprehensive utilization rate of lithium is high, transformation roasting energy consumption is low, the process is simple, cost is low, the method is suitable for industrial application, the important significance is achieved for efficient development and utilization of natural hard rock type lithium ore and secondary lithium resources, and the application and popularization prospects are great.

The invention provides a high-temperature-resistant soil raw material, and belongs to the technical field of high-temperature-resistant materials. The high-temperature heat-resistant soil raw material comprises the following raw materials in percentage by weight: 23-35% of basic raw material with the particle size of 3-8mm; 12%-28% of a strengthening additive with the particle size smaller than or equal to 0.35 mm; 3%-10% of a functional auxiliary material; the basic raw material is composed of raw ore and rock dry burning mud, spodumene raw ore, quartz and feldspar, and the heat-resistant temperature of the high-temperature heat-resistant soil raw material is greater than or equal to 500 DEG C (can reach 729 DEG C in a short time); the thermal shock resistance is improved by the high alumina content and the mullite structure, cracking is avoided when the temperature difference is larger than or equal to 300 DEG C, the thermal expansion system is low (lt: 4 * 10 / DEG C), heat conduction is uniform, local overheating is avoided, and the characteristics of rapid cooling and rapid heating resistance, high mechanical strength, good chemical stability and the like are achieved; the electric cooker inner container is suitable for electric cooker inner containers, stewpots and other electric appliance matching part products, and the requirements of IH heating, open fire heating and other daily cooking utensils are met.

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.

This application relates to the field of metal surface treatment materials, specifically disclosing a silicon-integrated inorganic supercrystalline thermal energy powder and its preparation and application methods. The silicon-integrated inorganic supercrystalline thermal energy powder comprises raw material A and raw material B. Raw material A includes the following: magnesium oxide, sodium fluoroaluminate, sodium polyphosphate, zinc oxide, crystalline tin tetrachloride, silicon dioxide, and boric acid. Raw material B includes the following raw materials in parts by weight: spodumene, lithium carbonate, titanium dioxide, zinc silicate, sodium carbonate, antimony trioxide, albite, fluorite, boric acid, sodium hydroxide, and yttrium oxide. The inorganic supercrystalline thermal energy powder of this application has advantages such as corrosion resistance and oxidation resistance, good thermal stability, no damage from thermal cycling, high hardness, wear resistance and high temperature resistance, energy saving, water scale reduction, and the ability to replace organosilicon high-temperature resistant special coatings, baking paints, enamel paints, and ceramic floor glazes.

The invention discloses a spodumene concentrate resourceful treatment method which comprises the following steps: carrying out wet treatment on spodumene acid clinker to prepare lithium-removed filter residues and leachate; carrying out neutralization treatment and desulfurization treatment on the leachate to obtain a lithium-containing purified solution, gypsum and iron oxide red, and carrying out lithium extraction treatment on the lithium-containing purified solution to obtain a lithium salt and mirabilite; the lithium-removed filter residues are treated through a process combining a beneficiation method and a chemical method, and water glass, nano kaolinite, ceramsite aggregate and tantalum-niobium concentrate are obtained. According to the method, whole-process slag-free production of the spodumene concentrate is achieved, and meanwhile the lithium-containing compound with the high purity and the high quality is obtained; and various valuable products can be obtained.

The invention discloses a method for preparing lithium phosphate with high efficiency and low cost, which comprises the following steps: roasting spodumene concentrate and phosphoric acid, and carrying out slurrying leaching and solid-liquid separation to obtain a lithium dihydrogen phosphate solution; the method comprises the following steps: evaporating and concentrating a lithium dihydrogen phosphate solution, regulating the pH value of the lithium dihydrogen phosphate solution to 7-8 by adopting ammonia water, adding calcium phosphate seed crystals, inducing to remove residual calcium ions and magnesium ions in the solution, and carrying out solid-liquid separation to obtain a phosphate solution containing lithium ions; and then adjusting the pH value back to 11-13 by adopting alkali for lithium precipitation to obtain a lithium phosphate solid, and washing and drying to obtain a battery-grade lithium phosphate product. According to the preparation process of the lithium phosphate, the spodumene is acidized and roasted by adopting phosphoric acid, and pulpified and leached, and calcium ions and magnesium ions in a solution are directly induced by adopting calcium phosphate seed crystals to form crystals to be separated out on the basis of a weakly alkaline condition, so that the process steps are simple and convenient, the subsequent purification procedure is omitted, and the preparation process is more suitable for industrialization; meanwhile, the lithium phosphate product with high purity and high yield can be obtained through the simple and convenient process, the purity can reach 99.5% or above, and the yield can reach 92% or above.

The invention discloses a method and a device for extracting lithium from lithium ore. The method comprises the following steps: carrying out fine grinding, sulfuric acid leaching, primary extraction, secondary extraction, aluminum precipitation, causticization sulfate radical removal, UF impurity removal, lithium adsorption by an aluminum-based adsorbent, sulfate radical conversion by chlorine type ion exchange resin, two-stage NF divalent salt removal, RO concentration, resin calcium and magnesium removal, MVR evaporation, lithium carbonate precipitation and other technological processes on the lithium ore to obtain the battery-grade lithium carbonate. According to the method, the lixivium obtained by a lithium ore concentrated sulfuric acid leaching method is separated and purified by taking a membrane method as a technical core, and causticization reaction and sulfate radical removal by resin are assisted, so that the removal of divalent anion impurities is realized, and the problems of low lithium leaching rate and high sulfate radical content in a lithium carbonate finished product in the process of extracting lithium from the lithium ore are solved; meanwhile, the sulfuric acid is recycled. The method is simple in process, low in energy consumption, high in extraction rate, high in automation degree and low in production cost, and can be applied to large-scale production of extracting lithium from spodumene or lepidolite.

The invention relates to the technical field of metallurgy, in particular to a method for extracting lithium through microwave acidification roasting and mechanical force ball milling leaching. According to the method for extracting lithium through microwave acidification roasting and mechanical force ball-milling leaching, microwave energy can be used for assisting calcination transformation of spodumene, and microwave energy is used for roasting an acid leaching material, so that the calcination effect is rapidly and efficiently achieved, and the use amount of sulfuric acid and calcination energy consumption are reduced. And a planetary ball mill is used for performing mechanical ball milling and water leaching on the caked roasted material after acid leaching and calcination, so that the water leaching efficiency is improved, and the lithium extraction rate is improved.

The invention provides a pegmatite type lithium ore prospecting method based on aviation hyperspectral remote sensing. The method comprises the following steps: step 1, inputting hyperspectral reflectivity data; step 2, calculating continuum removal data of a characteristic spectrum section; step 3, calculating a characteristic absorption wavelength position DL of the characteristic spectrum section; step 4, calculating the matching degree of the characteristic spectrum sections; 5, recognizing mineral end members; 6, inputting pegmatite vein distribution information; 7, delineating an abnormal pegmatite vein; and 8, delineating the lithium-containing pegmatite vein. The invention provides a muscovite and spodumene end member identification and lithium-containing pegmatite vein identification method, the fine identification of seven subclasses of muscovite can be realized, the identification of the subclasses in the existing aviation hyperspectral data is the most and finest, and meanwhile, the muscovite and spodumene information can be finely distinguished. Based on spodumene and muscovite information, the lithium-containing pegmatite vein can be rapidly screened from a large number of pegmatite veins, and therefore the prospecting efficiency of pegmatite type lithium ore is improved.

The invention discloses a preparation method of a three-dimensional split-phase fancy glaze for coal gangue ceramic body decoration, the three-dimensional split-phase fancy glaze comprises a ground glaze and a cover glaze, the cover glaze comprises the following raw materials by weight: 15-20% of quartz, 10-15% of calcite, 5-10% of kaolin, 5-10% of zinc oxide, 10-15% of calcium phosphate, 25-30% of potassium feldspar, 2-5% of calcium borate, 5-10% of tin dioxide, 3-5% of spodumene, and 2-5% of a coloring oxide; the ground glaze is prepared from the following raw materials in percentage by weight: 15-20% of quartz, 10-15% of wollastonite, 5-10% of kaolin, 10-15% of zinc oxide, 15-20% of calcium phosphate, 15-20% of spodumene, 5-10% of titanium dioxide, 5-10% of calcium borate, 2-5% of coal gangue and 2-5% of coloring oxide, and the product is obtained through raw material preparation, glazing and sintering. The prepared three-dimensional split-phase fancy glaze is simple in process, high in adaptability, unique in effect and wide in market prospect.

The invention discloses a reselection-flotation synergetic recovery stage grading process for tin-containing spodumene ores, stage separation is realized by adopting a reselection-flotation synergetic beneficiation method, the process is efficient and green, ore properties such as specific gravity, granularity and dissemination relationship of the tin-containing spodumene ores are fully utilized, metal loss of lithium and tin caused by over-grinding is avoided, and the quality of the tin-containing spodumene ores is improved. And meanwhile, recovery of spodumene and associated cassiterite in coarse and fine particle fractions is achieved through the dense medium mineral separation, reselection and flotation processes, minerals in different particle fractions are recovered in a stepped mode under the optimal equipment environment and technological parameters, and valuable metal resources such as tin and lithium are recovered to the maximum extent. In addition, the invention creatively provides the method for recycling tin through reselection of the lithium concentrate smelting slag, and full recycling of resources can be truly achieved.

The invention discloses a glaze with a shell luster effect, a shell pearlescent glazed tile and a preparation method thereof, and the glaze comprises the following raw material components in parts by weight: 14-24 parts of modified shell frit, 10-15 parts of albite, 9-16 parts of dolomite, 6-10 parts of kaolin, 6-9 parts of zinc oxide, 11-16 parts of strontium carbonate, 6-9 parts of limestone, 2-6 parts of barium carbonate and 15-25 parts of lithium feldspar. The modified shell frit is introduced and matched with other specific raw materials to prepare the glaze capable of presenting shell luster, so that a glass phase and a crystal phase with different refractive indexes are separated out in the firing process of the glaze, a shell-shaped iridescent and soft light effect is simulated, and a glaze surface has wear resistance, skid resistance and antifouling properties and has good physical properties.

The present invention discloses a high-strength ceramsite based on industrial solid waste and a preparation method thereof, belonging to the technical field of solid waste treatment. The present invention is made of bayer red mud, molybdenum slag, bauxite, spodumene, polyaluminum and industrial starch. It requires less raw materials, and the main materials are industrial solid waste bayer red mud and molybdenum slag, which are easy to obtain and beneficial to the recycling of solid waste, reducing environmental pollution. By the reduction magnetic separation method, the Fe 2 O 3 content is reduced to avoid strength reduction. By roasting activation and adding clay powder to increase the Si / Al ratio, a uniform and dense composite geopolymer is obtained, reducing the expansion of raw material reaction and improving the strength of ceramsite. Bauxite, red mud and molybdenum slag form mullite phase and a small amount of corundum phase at high temperature, making the ceramsite have high strength. Spodumene not only acts as a flux but also helps to form mullite at a lower temperature to increase the strength of the green body, reducing the sintering temperature and firing cycle.

The invention discloses a spodumene processing method and system, and the method comprises the steps: 1) crushing spodumene raw ore to obtain ore; (2) the crushed ore is screened through a linear screen and roughed through a blanket, and first ore fraction and second ore fraction are obtained; (3) the first ore is subjected to shaking table concentration operation, and third ore and tantalum-niobium concentrate are obtained; 4) performing blanket scavenging operation on the second mineral fraction to obtain a fourth mineral fraction and a fifth mineral fraction; (5) the third mineral component and the fifth mineral component are combined and subjected to cyclone desliming operation, and a sixth mineral component and a seventh mineral component are obtained; (6) the sixth ore component is subjected to strong magnetic roughing operation, and an eighth ore component and a ninth ore component are obtained; 7) carrying out blanket machine operation on the eighth mineral component to obtain a tenth mineral component and magnetic tailings; 8) performing spodumene rough flotation operation on the seventh ore fraction to obtain an eleventh ore fraction and a twelfth ore fraction; (9) spodumene scavenging operation is conducted on the eleventh ore fraction, and a thirteenth ore fraction and a fourteenth ore fraction are obtained; (10) the ninth ore component is subjected to strong magnetic concentration operation, and a fifteenth ore component and feldspar concentrate are obtained; and (11) spodumene concentration operation is conducted on the twelfth ore fraction, and sixteenth ore fraction and spodumene concentrate are obtained. According to the method, the spodumene concentrate yield is high, byproducts generated in the machining process can be comprehensively utilized, and zero emission is achieved.

The invention discloses a low-temperature-resistant spodumene flotation collector as well as a preparation method and application thereof, and relates to the technical field of mineral flotation. The flotation collecting agent is prepared from the following raw materials in percentage by mass: 60%-80% of an anionic fatty acid collecting agent, 5%-20% of a sulfonate auxiliary collecting agent, 5%-15% of a hydroximic acid auxiliary collecting agent and 3%-15% of a nonionic surfactant. The flotation collecting agent still has excellent collecting performance and selectivity under the low-temperature condition of 6 DEG C, the problem that the low-temperature activity of a conventional flotation collecting agent is suddenly reduced is effectively solved, pre-desliming or calcium chloride activation is not needed when the flotation collecting agent is used, the process is simple, the cost is low, and the flotation collecting agent is suitable for industrial flotation of spodumene ore.

The invention relates to high-strength and high-transparency nano glass ceramic and a preparation method and application thereof, and the high-strength and high-transparency nano glass ceramic is prepared from a synthetic aluminum-rich feldspar ceramic glass material, a beta-spodumene material, a cordierite material, a synthetic beta-dicalcium silicate material and a magnesium aluminate spinel material. According to the present invention, a stable-structure feldspar matrix glass is adopted as a main body precursor mineral material, zirconia micro-powder with a particle size of less than 10 nm is adopted as a nucleation agent and a micro-crack damping pinning agent, nanometer microcrystals with a particle size of less than 100 nm are controlled to be generated in a glass body formed after melting, and the nanometer microcrystals account for 50-95% by volume; the high-strength and high-transparency nanocrystalline glass with a uniform microstructure is formed and woven with matrix glass in a symbiotic manner. The prepared nano microcrystalline glass has the advantages of high hardness, high fracture toughness resistance and high light transmittance, and is suitable for manufacturing various optical glass.

The invention discloses a spodumene smelting slag desulfurization method, and belongs to the technical field of solid waste resource utilization. The method provided by the invention comprises the following steps: S1, mixing spodumene smelting slag with water, and adjusting the pH value to 8-12.5 to prepare ore pulp; s2, a regulator is added into the ore pulp for pulp mixing, and first pulp is obtained; the adjusting agent comprises water glass, sodium citrate and ethylenediamine tetramethylene sodium phosphate; and S3, a collecting agent is added into the first slurry, flotation desulfurization operation is carried out, filtering and drying are carried out, and a gypsum product and desulfurized lithium slag are obtained. The desulfurization method is high in desulfurization efficiency and simple in technological process.

The invention belongs to the technical field of mineral separation, and discloses an amidated carboxylic acid compound, a collecting agent for spodumene flotation, a preparation method of the amidated carboxylic acid compound and application of the amidated carboxylic acid compound in spodumene flotation. The amidated carboxylic acid compound is obtained through the reaction of amino acid, acyl chloride and sodium hydroxide, is resistant to acid and alkali in the normal temperature state, is not prone to decomposition and can improve the selectivity of the collecting agent. The collecting agent comprises 30-45 parts of amidated carboxylic acid compounds, 5-15 parts of oleic acid, 3-10 parts of inorganic base and 10-25 parts of alcohol compounds. The spodumene flotation collecting agent has good dispersity, foaming capacity and capacity of inhibiting gangue, feldspar and quartz minerals, has a good collecting effect on spodumene at the room temperature, remarkably improves ore selectivity, guarantees the concentrate grade of spodumene, meanwhile improves the recovery rate and has a good application effect in spodumene flotation.

The invention discloses a method for extracting lithium from spodumene smelting slag, which relates to the technical field of lithium slag solid waste recovery. The method comprises the following steps: S1: mixing lithium slag, fluoride and sulfuric acid to obtain a mixed solution; S2: heating and stirring the mixed solution, and then performing solid-liquid separation to obtain solid product leaching slag and liquid product leaching solution; S3: purifying and removing impurities, evaporating and concentrating, precipitating lithium, filtering, washing and drying the leaching solution in sequence to obtain a lithium carbonate product. The method realizes efficient leaching of lithium from spodumene smelting slag by adding fluoride as a leaching aid, and the process does not require high-temperature heat treatment, has a simple process and low production cost.

The invention relates to the technical field of casting powder, in particular to electromagnetic ejection duplex stainless steel special casting powder which comprises the following raw materials: red mud, wollastonite, modified fluorite, borax, spodumene and blast furnace slag. The fluorite is treated through yttrium oxide modification and forsterite coating processes, release of harmful fluorine ions at high temperature is effectively inhibited, and erosion to refractory materials is greatly reduced; meanwhile, the stability of particles is enhanced through forsterite coating, and the comprehensive use effect of the casting powder is improved; in addition, the modified fluorite is beneficial for forming a slag film with better lubricity, and slag entrapment and casting blank surface defects are reduced.

The invention discloses a method for simultaneously preparing a filter aid and aluminum salt from lithium slag, and relates to the technical field of waste resource utilization. The method comprises the steps that the lithium slag is pretreated to remove substances with magnetism and / or large specific gravity in the lithium slag, and pretreated slag is obtained; uniformly mixing a mixed solution of ammonium sulfate and sulfuric acid with the pretreatment slag, grinding, carrying out hydrothermal reaction on the mixed slurry, and carrying out solid-liquid separation to obtain silicon slag and an aluminum ammonium sulfate solution; carrying out microwave treatment on the silicon slag to obtain a filter aid; and carrying out cooling crystallization and recrystallization purification on the aluminum ammonium sulfate solution to prepare aluminum ammonium sulfate. According to the method, the spodumene lithium extraction tailings are used as the raw material, valuable components in the lithium slag can be efficiently utilized in an environment-friendly mode, the filter aid and the aluminum salt which are excellent in performance are prepared, cyclic utilization of resources is achieved, and the method has important practical significance and wide application prospects. In addition, valuable metal elements such as rubidium, cesium, titanium and beryllium can be comprehensively recycled, and the resource utilization rate is increased.