254 results about "Sodium fluoride" patented technology

The invention belongs to the technical field of medical materials, and particularly relates to a tooth whitening composition and a preparation method thereof, the tooth whitening composition comprises the following components by weight: 5%-15% of hydrogen peroxide, 0.5%-1.5% of a gel matrix, 0.2%-1.0% of a thickener, 5%-10% of a humectant, 3%-8% of propylene glycol, 0.05%-0.2% of a chelating agent, 1%-3% of a sweetener, 0.1%-0.5% of sodium fluoride, and the balance of water. Aiming at the problems that an existing tooth whitening product is relatively low in pH value (most of 4.0-5.0), easy to irritate gingiva and sensitive in tooth manufacturing, and the existing tooth whitening product needs to be stored in a dark place at a low temperature and is short in whitening validity period, the pH value of the product is adjusted to 5.5-6.5, so that the product is close to oral saliva, the irritation can be reduced, the stability of the product can be ensured, the product is not easy to decompose, and the tooth whitening effect is good. Active ingredients are prevented from losing efficacy in advance, and the whitening validity period is prolonged.

The invention provides a method for solidifying heavy metal ions in lithium slag, and belongs to the technical field of solidified lithium slag treatment. The method for solidifying the heavy metal ions in the lithium slag comprises the steps that lithium slag powder is taken as a base material, sodium fluoride, silicon carbide, sodium tetraborate and hydroxyapatite are added into the base material for dry mixing, and mixed powder is obtained; adding deionized water into the mixed powder to prepare a spherical green body; drying the spherical green body to obtain a dried green body; and sintering the dried green body, and cooling to room temperature to obtain the cured lithium slag ceramsite. According to the method, pollution-free treatment of the lithium slag is achieved, meanwhile, the treatment process is simplified, environmental damage is reduced, and resource utilization of the lithium slag is improved.

The invention discloses a gel composition for improving compatibility and gelling speed of a tooth whitening product. The gel composition comprises whitening gel and a catalyst, respectively filling the whitening glue and the catalyst into a double-barrel injector; when the tooth whitening gel is used, the push rod is pushed, the whitening gel and the catalyst in the double-tube barrel are squeezed out at the same time and mixed at the mixing head to form the tooth whitening gel capable of being smeared on the tooth surface of a patient, and the pH value of the tooth whitening gel is 7.5-10.0. The catalyst comprises potassium salt or strontium salt, sodium fluoride, glycerol, cross-linked polyacrylamide gels, strong alkaline substances, essence and water; the whitening gel comprises a hydrogen peroxide solution, a cross-linked polyacrylamide gel, glycerin, essence and water. The cross-linked polyacrylamide gel is adopted, the gel is resistant to strong-alkalinity and high-pH environment and various inorganic salt ions such as fluoride, sylvite or strontium salt, the prepared gel is stable in form and good in compatibility, the gel preparation process is simple, the gel is rapidly swelled when encountering water and does not huddle, and long-time standing is not needed.

The invention relates to the technical field of resource recycling of manganese-containing wastewater, in particular to a process for preparing industrial-grade manganese carbonate by using a recycled manganese chloride solution, which adopts a two-stage purification and impurity removal strategy, performs primary purification and impurity removal by using sodium sulfide and sodium fluoride, and performs secondary impurity removal by using iminodiacetic acid grafted chelating resin. According to the invention, the problems of poor adaptability and incomplete impurity removal of the manganese chloride solution in the prior art are solved, the purity of the product is obviously improved so as to meet the requirements of the industrial grade manganese carbonate, and the process flow is simple.

The invention provides a zinc-copper-nickel-copper smelting deslagging agent and a preparation method and a use method thereof. The zinc-copper-nickel-copper smelting deslagging agent comprises the following raw materials in percentage by mass: 5-15% of calcium fluoride, 20-30% of sodium carbonate, 5-15% of sodium fluoride, 10-20% of sodium hexafluoroaluminate and the balance of borax. Compared with the prior art, the zinc-copper-nickel-copper slag remover prepared by mixing the raw materials can effectively reduce impurities to be less than 0.14% of Fe, less than 0.005% of Pb and less than 0.003% of Si in the smelting process, the impurity components are obviously reduced, the number of times of component adjustment and unqualified sampling is reduced, impurities mixed in a casting blank are reduced, and finally the metal purity and the casting quality are improved. Meanwhile, loss of zinc and nickel is reduced to the maximum extent; and adverse effects on the zinc-copper-nickel alloy are avoided.

The invention relates to a battery material preparation technology, in particular to a method for preparing high-purity cobaltous sulfate from crude cobaltous hydroxide, which comprises the following steps: S1, reacting the crude cobaltous hydroxide with sulfuric acid to generate magnesium sulfate; s2, washing to remove magnesium; s3, adding sulfuric acid and hydrogen peroxide into the crude cobalt hydroxide after magnesium washing; adding crude cobalt hydroxide to adjust the pH value to obtain a purified solution; s4, adding sodium fluoride into the purified liquid, and filtering after reaction to obtain filtrate; s5, saponifying with sodium hydroxide by using an acidic extractant, then performing soap conversion by using a cobalt sulfate solution, extracting manganese in the filtrate by using an obtained organic phase, and then performing reverse extraction on the organic phase by using sulfuric acid to obtain a manganese sulfate solution; s6, the raffinate obtained after manganese extraction is introduced into an adsorption tower loaded with a zirconium-based composite fluorine adsorbent; and S7, concentrating and crystallizing the defluorinated solution. According to the method, the zirconium-based composite fluorine adsorbent is introduced to be coupled with the process, fluorine ions can be removed, and cobalt loss caused by cobalt fluoride precipitation and the influence of the fluorine ions on the quality of a cobalt sulfate product are avoided.

The embodiment of the invention provides a friction material composition, a brake lining, a preparation method of the brake lining, a brake and a vehicle. The friction material composition comprises the following raw materials in parts by weight: 2-10 parts of a fluoride mixture, 8-15 parts of graphite, 8-12 parts of phenolic resin, 4-12 parts of a metal oxide, 15-40 parts of a fiber material and 20-40 parts of other fillers, wherein the fluoride mixture comprises at least two of calcium fluoride, barium fluoride, cerium fluoride, aluminum fluoride, magnesium fluoride, potassium fluoride, sodium fluoride, beryllium fluoride and manganese fluoride. The brake lining prepared from the friction material composition can solve the problems of high wear rate and heat fading at the same time, the service life of the brake lining is prolonged, and the braking effect is improved.

The invention relates to the technical field of sodium silicate production, and particularly discloses a method for preparing sodium silicate by dissolving fluorine-containing silicon dioxide with alkali lye, which comprises the following steps: step 1, adding fluorine-containing silicon dioxide, sodium carbonate and water into a reaction kettle with a stirrer and a heating device to obtain a mixed material; 2, fully and uniformly stirring the mixed material obtained in the step 1, heating the mixed material by using a reaction kettle, and controlling the reaction temperature and the reaction time for reaction; and 3, filtering and separating the reaction product obtained in the step 2 to obtain a sodium fluoride filter cake and a sodium silicate solution. Sodium carbonate and sodium bicarbonate are used for dissolving silicon dioxide in a liquid phase reaction to prepare sodium silicate, the process is green and environment-friendly, sodium carbonate in chemical production can be effectively utilized, energy is saved, consumption is reduced, and the environment is protected. The technical problems that in the prior art, the temperature is high in the reaction process, a large amount of heat needs to be consumed, and energy consumption is high are solved.

The invention provides a high-toughness austenitic stainless steel welding rod for 5Ni steel and a preparation method of the high-toughness austenitic stainless steel welding rod. The welding rod comprises a core wire and a coating coated on the surface of the core wire, and based on the total amount of the core wire, the core wire comprises the following components in percentage by mass: less than or equal to 0.09% of C, less than or equal to 0.15% of Si, 1.6-2.5% of Mn, 18.5-20.5% of Cr, 12.5-14.5% of Ni, 2.1-3.2% of Mo and 0.06-0.18% of Ti; 0.12-0.24% of Al, less than or equal to 0.007% of S, less than or equal to 0.008% of P, less than or equal to 0.006% of O, less than or equal to 0.001% of H, less than or equal to 0.012% of S + P, and the balance Fe and inevitable impurities. On the basis of the total amount of the coating, the coating comprises, by mass, 28-38% of carbonate, 15-20% of fluorite, 1-3% of lithium fluoride and sodium fluoride, 8-12% of synthetic mica, 3-6% of potassium silicotitanate, 2-4% of zircon sand, 9-15% of electrolytic manganese metal, 2-4% of ferrotitanium, 2-5% of passivated nickel-magnesium alloy, 1-3% of atomized ferrosilicon, 1-3% of lanthanum cerium fluoride, 1-3% of tungsten and molybdenum, 3-5% of nitrided ferrochromium and 1-2% of CMC. The welding rod is good in all-position welding controllability, extremely low in air hole sensitivity and excellent in low-temperature toughness, and can meet the requirements for high-quality and efficient welding of 5Ni steel.

The invention discloses a novel sodium ion battery halide solid electrolyte, and belongs to the technical field of electrolyte materials, the molecular formula of the halide solid electrolyte is NaXTaCl5FX, X is equal to 1-3, the halide solid electrolyte is weighed according to the molar ratio of tantalum chloride to sodium fluoride under the protection of argon, and electrolyte matrix mixed powder is obtained through high-energy ball milling; carrying out ball milling on nano silicon dioxide and zinc bromide according to a molar ratio to prepare a sintering aid; the electrolyte matrix mixed powder is pressed into a biscuit piece, and the biscuit piece is subjected to heat treatment in argon to obtain a halide electrolyte matrix; and finally, grinding the halide electrolyte matrix, doping a sintering aid, tabletting, sintering and ball-milling to obtain the novel sodium-ion battery halide solid electrolyte. And densification and structural stability of the material are synergistically realized, and finally the solid electrolyte with high ionic conductivity and wide electrochemical window is obtained.

The invention discloses a process method for preparing aluminum fluoride by recovering electrolytic aluminum electrolyte, and relates to the technical field of waste material recovery. The invention relates to a process method for preparing aluminum fluoride by recovering electrolytic aluminum electrolyte. The preparation method comprises the following steps: firstly, grinding the carbon residue or electrolyte into powder, wherein the fineness is greater than 150 meshes; adding water into the powder, pulping, and adding a certain amount of aluminum sulfate or aluminum hydroxide; sulfuric acid is added for leaching under the stirring condition, the leaching temperature ranges from 70 DEG C to 100 DEG C, the leaching time ranges from 2 h to 5 h, and the pH of the leaching end point ranges from 1 to 2; adding water to dilute the filtrate, adding caustic soda flakes to adjust the pH value to 12-14 to remove impurities, and filtering out insoluble hydroxides to obtain a mixed salt solution of sodium fluoride and sodium metaaluminate; adding sulfuric acid into the mixed salt solution while stirring to adjust the pH value to 3-6, and reacting at the temperature of 60-100 DEG C for 2-5 hours to obtain aluminum fluoride slurry; and filtering and washing the slurry to obtain aluminum fluoride trihydrate, and calcining at 500-700 DEG C to obtain anhydrous aluminum fluoride with the purity of more than 95%. The method turns waste into wealth, recycles resources, and is short in process flow, low in cost and high in recovery rate.

The application discloses a preparation method and application of a fluoride sodium ion battery positive electrode material, and belongs to the technical field of sodium ion battery positive electrode material preparation, and comprises the following steps: (1) dissolving an iron salt in deionized water to obtain an A solution; uniformly mixing sodium fluoride and an inorganic acid in water to obtain a B solution; (2) dropping the A and B solutions into a co-precipitation reaction kettle at the same flow rate, and reacting under heating and stirring, and monitoring the pH value of the reaction system in real time; and washing and drying to obtain a precursor Na3FeF6; (3) mixing the precursor with a carbon source, and sintering under an inert atmosphere to obtain a sodium ion battery positive electrode material NaFeF3@C coated with a carbon layer; the application effectively solves the capacity attenuation and cycle stability problems of the sodium ion battery positive electrode material, and provides a solution with high performance, low cost and environmental friendliness for development of the sodium ion battery positive electrode material.

This invention relates to a sodium-supplementing material capable of simultaneously replenishing active sodium and sodium hexafluorophosphate, and its preparation and application. The sodium-supplementing material comprises the following raw material components by weight percentage: 10-50% elemental phosphorus, 50-90% sodium fluoride, and 1-5% Ketjen Black. Compared with existing technologies, the phosphorus-based bifunctional sodium-supplementing separator and sodium-supplementing cathode provided by this invention not only possess higher theoretical capacity, effectively compensating for irreversible capacity loss during the first cycle of the battery, but also generate NaPF6 in situ under electrochemical conditions through the synergistic reaction of red phosphorus and sodium fluoride, achieving simultaneous replenishment of active sodium and electrolyte sodium salts, thereby improving the initial coulombic efficiency and long-term cycle performance of the battery.

The invention relates to the technical field of zinc hydrometallurgy, and discloses an analysis method for measuring high cobalt content by an EDTA complexing back titration method, which is based on the following steps: oxidizing Co < 2 + > into Co < 3 + > by using potassium nitrite in an acetic acid medium to form cobalt potassium nitrite precipitate so as to realize separation of cobalt and interfering ions, dissolving the precipitate, complexing with excessive EDTA, and performing back titration by using a zinc standard solution. Xylenol orange is used as an indicator, and determination is completed at room temperature in a hexamethylenetetramine buffer system with the pH value being approximately equal to 5.8. Coexisting ion interference is effectively eliminated through tartaric acid, sodium fluoride, thiourea and other masking agents, the method has the advantages of being easy and convenient to operate, sensitive in end point, high in accuracy and low in cost, and the requirement for conventional analysis of high-cobalt materials can be met.

The application provides an automatic titration analysis method for measuring the aluminum content in high aluminum alloy, which adopts direct reaction of fluoride with a test solution to realize one-step direct titration, and determines the aluminum content in the range of 2.00% to 100.00%, and comprises the following steps: sample decomposition; precipitation of interfering ions; calibration of sodium fluoride standard solution; calibration of automatic potentiometric titrator; and measurement of the sample to be tested. The application solves the problems of sample pretreatment and how to avoid the influence of interfering ions on the determination of aluminum content. The titration operation, reading and calculation are automatically completed by the instrument, effectively reducing human errors, and the application has the advantages of simple operation, accurate and rapid results, wide application range and the like.

The present disclosure provides a method for solidifying heavy metal ions in lithium slag, belonging to the technical field of lithium slag treatment. The method for solidifying heavy metal ions in lithium slag comprises: taking lithium slag powder as a base material, adding sodium fluoride, silicon carbide, sodium tetraborate and hydroxyapatite to the base material for dry mixing to obtain a mixed powder; adding deionized water to the mixed powder to prepare a spherical green body; drying the spherical green body to obtain a dry green body; and performing sintering treatment on the dry green body, and cooling to room temperature to obtain solidified lithium slag ceramsite. The method realizes nuisance-free treatment of lithium slag, simplifies the treatment process, reduces environmental damage, and improves the resource utilization of lithium slag.

The invention relates to a preparation method of sodium fluoborate, which comprises the following steps: step a, dissolving sodium fluoride and sodium sulfate solid residues generated in the production process of nuclear grade boron-10 acid in a certain amount of deionized water, and filtering; b, evaporating the filtered solution, crystallizing when the residual volume of the evaporated solution reaches a certain degree, and then filtering again; and step c, dissolving the sodium fluoroborate obtained after filtration in a certain amount of ultrapure water, filtering and drying to obtain the high-purity sodium fluoborate. According to the invention, direct preparation of sodium fluoborate is realized, the step of firstly converting sodium fluoborate into boric acid in the traditional process is omitted, the process steps are optimized, the reaction time is shortened, the reaction flow is reduced, the utilization rate of raw materials is increased, and the reaction economy is improved.

The application discloses a kind of children's toothpaste composition and its preparation method and application, belong to oral care technical field.The composition includes anticaries efficacy component, anti-inflammatory composition, color-changing microcapsule and toothpaste acceptable adjuvant;Anticaries efficacy component is compounded by sodium fluoride, casein phosphopeptide and ten kinds of components, and anti-inflammatory composition is composed of Notopterygium extract, Magnolia officinalis extract, Prunus divaricata extract and kale leaf extract according to specific proportion.Preparation method is completed by water phase preparation, liquid phase deployment, powder mixing, paste machine stirring and vacuum degassing and the like steps, and process is stable and controllable.The toothpaste has anticaries and anti-inflammatory effects, and the color-changing microcapsule can change color during brushing, which improves the brushing interest of children and prompts proper cleaning.The toothpaste is suitable for preparing oral care products for children, and the components are safe and mild, which are suitable for the physiological environment of children's oral cavity.

The invention discloses a low-melting-point high-transference-number electrolyte material for a fluorine ion thermal battery and a preparation method thereof.The preparation method comprises the steps that lithium fluoride, sodium fluoride and potassium fluoride are mixed in proportion and subjected to first calcination treatment for 4-6 h at the temperature of 500-600 DEG C, an obtained product is rapidly cooled, and powdery ternary fluoride eutectic salt is obtained; mixing cesium fluoride with the ternary fluoride eutectic salt in proportion, performing secondary calcination heat treatment for 4-6 hours at the temperature of 600-700 DEG C, and then quickly cooling to obtain powdery quaternary fluoride eutectic salt; and mixing the quaternary fluoride eutectic salt with magnesium oxide of which the mass is 0.8-1.2 times that of the quaternary fluoride eutectic salt, carrying out third calcination treatment at 400-600 DEG C for 3-5 hours, and then rapidly cooling and crushing. By adding the high-atomic-number cation salt, the fluorine ion transference number of the fused salt is improved, the multi-element eutectic salt is obtained, the salt melting point is reduced, the working temperature range of the fluorine ion thermal battery is widened, and the specific energy of the battery is improved.

Regarding molten salts used in contact with graphite in nuclear reactors, there is a need for them to be easily maintained under strong reducing conditions without causing graphite degradation. [Solution] Use of a molten salt containing aluminum trifluoride and sodium fluoride as a primary coolant for a nuclear fission reactor, wherein the molten salt comes into contact with graphite and aluminum metals during the operation of the nuclear fission reactor.

The invention relates to the technical field of mineral flotation, and discloses a method for compounding a lithium oxide collecting agent in a low-temperature environment, and the lithium collecting agent comprises the following compounding raw materials in percentage by mass: 15-25% of palmitic acid soap; 10%-20% of sulfonated petroleum; 5% to 10% of iso-tridecanol polyoxyethylene ether; 8%-15% of fatty alcohol-polyoxyethylene ether; 3%-8% of polyoxyethylene ether sodium sulfonate; 5%-10% of dipropylene glycol monomethyl ether; 8%-15% of sodium carbonate; 2%-5% of sodium hydroxide; 0.5%-2.0% of sodium fluoride; 0.5%-2.0% of aluminum sulfate; 1%-4% of tannic acid; a synergistic surfactant system is formed by constructing palmitic soap and sulfonated petroleum as a main collecting frame and compounding isomeric alcohol ether, fatty alcohol-polyoxyethylene ether and polyoxyethylene ether sodium sulfonate, dipropylene glycol monomethyl ether is introduced as a low-temperature mutual solvent, and the low-temperature mutual solvent is used for collecting the high-temperature-resistant oil-displacing agent for the oil-displacing oil-displacing agent for the oil-displacing oil-displacing oil-displacing oil-displacing oil-displacing oil-displacing oil-displacing oil. The freezing point and viscosity of a collecting agent system are greatly reduced, the liquidity, uniformity and dispersion stability of the collecting agent are still kept when the collecting agent is used in the low-temperature environment of 0-15 DEG C, and the failure problem caused by low-temperature solidification or layering is fundamentally avoided.

The invention belongs to the technical field of industrial solid waste recovery treatment, and particularly relates to a method for preparing white carbon black by utilizing purified fly ash. A white carbon black product with high purity, high specific surface area and hydrophobicity is obtained through the stability and controllability of a three-stage synergistic purification, wet-state desilicication and carbonization modification process, the three-stage synergistic purification effectively breaks and removes wrapping structures of impurities such as iron and carbon through the wet-state synergistic effect of magnetic separation, flotation and acid leaching, and the purity of the white carbon black product is improved. A foundation is laid for high-purity products and high extraction rate; the wet-state direct desilicication process avoids particle aggregation caused by drying, improves the contact efficiency of alkali liquor and active SiO2, realizes efficient and mild desilicication by matching with the desilicication assisting effect of sodium fluoride, and remarkably improves the extraction rate and the product performance compared with a dry powder desilicication process; coupling agent grafting is achieved through high-activity silicon hydroxyl on the surfaces of particles in carbonization and modification, and compared with a traditional technology, the hydrophobicity of the product and the DBP oil absorption value are greatly improved, and high-quality and high-performance white carbon black is obtained.

The invention belongs to the field of pharmaceutical preparations, and relates to a multi-trace element injection and a preparation method thereof. The multi-trace element injection comprises effective components, a stabilizer and water, the effective components comprise chromium chloride, copper chloride, ferric chloride, manganese chloride, sodium molybdate, sodium selenite, zinc chloride, potassium iodide and sodium fluoride, and the stabilizer comprises xylitol, a pH regulator and an additive; and the additive is PEG (Polyethylene Glycol) 400 or PEG 600. The multi-trace element injection provided by the invention can effectively inhibit the loss of iodine in the sterilization process, and the stability, economical efficiency and production controllability of the multi-trace element injection are fundamentally improved.

This invention relates to the field of chemical process technology, specifically to a method for preparing sodium hexafluoroantimonate. The preparation method includes the following steps: (1) adding antimony trioxide, hydrogen fluoride aqueous solution, and sodium fluoride into a reaction vessel, stirring and heating, introducing a fluorine-nitrogen mixed gas, and then refluxing the reaction; (2) filtering and then flash evaporation concentration; (3) subsequently cooling and crystallizing at 0~15℃, and centrifuging to obtain sodium hexafluoroantimonate crystals. The preparation method provided by this invention can achieve fluorination, oxidation, and salt formation in one step simultaneously, with a simple process route and a significant reduction in steps; using low-concentration fluorine gas as an oxidant and fluorine source, the atom utilization rate is high, the reaction rate is fast, the raw material consumption is close to the stoichiometric ratio, the final product has a trivalent antimony residue of ≤0.01%, and the product purity is as high as 99.9%; combined with flash evaporation concentration, hydrogen fluoride and mother liquor recovery and recycling process, it can reduce raw material consumption and waste liquid discharge, thereby improving product yield and reducing production costs.

The invention relates to an ethylene glycol regulated rare earth europium doped Sr2LaF7 nano material as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, dissolving strontium chloride, lanthanum nitrate and europium nitrate in water to form a uniform solution; then adding ethylene glycol accounting for 20-70% of the volume of the deionized water, and regulating crystal growth by utilizing coordination of the ethylene glycol and metal ions; adding an ammonium fluoride or sodium fluoride solution, adjusting the pH value, and carrying out a hydrothermal reaction at 100-180 DEG C for 4-12 h; and finally, centrifuging, washing and drying to obtain a final product. Compared with the prior art, the morphology-controllable preparation of the Sr2LaF7 nano material is realized through directional regulation and control of ethylene glycol and a simple hydrothermal method, and the product has the advantages of high luminous intensity, uniform morphology and the like, and has an application prospect in the fields of fluorescence labeling and the like; the method is simple in process and low in cost.

The invention relates to a preparation method of NaLnS2 transparent ceramic powder with high infrared light transmittance, which comprises the following steps: by taking rare earth polysulfide LnS2 powder as a raw material and sodium fluoride or sodium sulfide as an additive, mixing the raw material and the additive to prepare a precursor of the NaLnS2 ceramic powder, putting the prepared precursor powder into an improved ball milling tank, and carrying out ball milling to obtain the NaLnS2 transparent ceramic powder with high infrared light transmittance. And carrying out mechanochemical reaction in a protective gas environment, and after ball milling is finished, separating out powder to obtain the NaLnS2 transparent ceramic powder. The problem that the NaLnS2 transparent ceramic powder is easy to oxidize due to high-temperature vulcanization is solved, and the prepared NaLnS2 transparent ceramic powder is low in oxygen content and small in particle size.

The invention provides nitrogen-containing steel die casting covering slag and a preparation process thereof, and belongs to the technical field of covering slag. The invention relates to nitrogen-containing steel die casting covering slag which is prepared from the following components in parts by weight: 3 to 7 parts of iron oxide powder, 15 to 30 parts of wollastonite, 10 to 40 parts of flint clay, 8 to 18 parts of aluminum ash, 5 to 10 parts of silicon iron powder, 5 to 10 parts of quartz, 5 to 10 parts of lithium carbonate, 5 to 10 parts of sodium fluoride and 5 to 10 parts of laterite. The weight part of the silicon iron powder is 2-7 parts, the weight part of the quartz is 20-30 parts, the weight part of the lithium carbonate is 1-3 parts, the weight part of the sodium fluoride is 1-5 parts, and the weight part of the laterite is 10-25 parts. According to the nitrogen-containing steel die casting covering slag, through resource utilization of aluminum ash, the problem of nitrogen precipitation in the condensation process of a nitrogen-containing steel die casting ingot is solved, and the occurrence rate of subcutaneous pores and cracks of the nitrogen-containing steel die casting ingot is remarkably reduced.

The invention discloses a treatment method and a treatment system for tail gas of a lithium iron phosphate battery pole piece leftover material recycling production line, and belongs to the technical field of tail gas treatment. The method comprises the following steps: pretreating tail gas; performing high-temperature oxidation treatment; primary cooling: controlling the temperature of the cooled tail gas to be not lower than 500 DEG C; cooling for the second time; and alkali absorption: introducing the cooled tail gas into an alkali absorption tower, and removing hydrogen fluoride to obtain the treated tail gas. The temperature of the cooled tail gas is controlled to be not lower than 500 DEG C; the tail gas is prevented from condensing to form liquid drops, acid liquor is separated out, and equipment corrosion is avoided; and calcium hydroxide is utilized to regenerate an alkali absorbent sodium hydroxide, the absorption efficiency of hydrofluoric acid is improved, generated sodium fluoride is easily dissolved in water, precipitates cannot be generated to block a pipeline, the actually consumed absorbent is calcium hydroxide, and the cost is low.

The invention relates to the technical field of SPC floors, in particular to an SPC floor base material and a preparation method thereof. The SPC floor base material comprises the following raw materials in parts by mass: 40-80 parts of polyvinyl chloride resin, 10-30 parts of ethylene propylene diene monomer, 25-55 parts of calcium carbonate, 0.01-0.1 part of hexadecyl trimethyl ammonium chloride, 0.05-0.4 part of sodium fluoride, 5-10 parts of tetraethoxysilane, 1-5 parts of ammonia water with the mass fraction of 10-15%, 1-2 parts of a plasticizer, 1-2 parts of a stabilizer and 1-2 parts of a dispersing agent. The calcium carbonate is subjected to bionic treatment, so that the binding force between the calcium carbonate and the polyvinyl chloride resin and the binding force between the calcium carbonate and the ethylene propylene diene monomer are increased, the extremely low size deformation rate can be kept even if the addition amount is large, the warping and denaturation prevention effect is excellent, meanwhile, the good antibacterial effect is achieved, and the durability is remarkably improved.

The present application relates to the technical field of lithium ion battery recycling, in particular to a method for stripping lithium ion battery pole piece and application thereof. The method for stripping lithium ion battery pole piece comprises: immersing the pole piece into a mixed solution containing a stripping agent and a stripping aid for reaction, and obtaining the separated active material layer and the current collector layer after a period of time; the stripping agent comprises a carboxylic acid containing at least two carboxyl groups; the stripping aid comprises at least one of sodium fluoride, potassium fluoride, ammonium fluoride, phosphoric acid, sodium phosphate, monosodium phosphate, sodium metaphosphate, potassium phosphate, monopotassium phosphate, potassium metaphosphate, ammonium phosphate, disodium ethylenediaminetetraacetate, tetrasodium ethylenediaminetetraacetate, inositol hexaphosphate and its salt, inositol pentaphosphate and its salt, inositol tetraphosphate and its salt, and inositol triphosphate and its salt. The method can realize the separation of the active material and the current collector, the hydrogen production amount is small during the whole stripping process, the current collector obtained after stripping is intact, the separation time is short, and the separation efficiency is high.