180 results about "Lead oxide" patented technology

The invention discloses a tungsten alloy material containing a silicon carbide reinforced Al2O3-SiO2-based multiphase ceramic coating and a preparation method of the tungsten alloy material, and belongs to the field of ceramic material preparation. The method comprises the following steps: ball-milling and mixing powder raw materials containing modified silicon carbide, aluminum oxide, silicon dioxide and lead oxide with a solvent, and defoaming to obtain ceramic slurry; the ceramic slurry is brushed on the surface of a tungsten alloy matrix subjected to surface pretreatment, and after drying, vacuum sintering is performed to obtain the tungsten alloy. The compact silicon carbide reinforced Al2O3-SiO2-based multiphase ceramic coating is introduced to the surface of a tungsten alloy matrix, the hardness, the high-temperature oxidation resistance and the high-temperature carburization resistance of a tungsten alloy material are remarkably improved, the stability of the coating can be improved through the silicon carbide distributed in a dispersed point shape, the thermal expansion coefficient of the coating is evenly reduced, and the hardness, the high-temperature oxidation resistance and the high-temperature carburization resistance of the tungsten alloy material are improved. The thermal expansion coefficient difference value between the multiphase ceramic coating and a tungsten alloy matrix is reduced, and the thermal shock resistance of the coating is improved.

An achromatic imaging optic (20) is used to image an output field (16a) along a beam path (23) of the imaging optic (20) into a target field (14) for use in DUV microlithography. The imaging optic (20) has a plurality of lenses (L1 to L13), each containing less than 5% lead oxide. At least one of the lenses (L5, L7, L9) is made of a high-dispersion optical material with an Abbe number less than 50. At least one of the lenses (L1 to L4, L6, L8, L10 to L13) is made of a low-dispersion optical material with an Abbe number greater than 50. This results in an imaging optic with simplified manufacturing. Depending on the design, the imaging optics can be part of an optical system of a projection exposure system as an illumination lens (20) or as a projection lens.

The invention relates to a method for preparing high-purity bismuth by removing impurity lead in refined bismuth through oxidation slagging, and belongs to the technical field of non-ferrous metals. Melting and oxidizing: melting a lead-containing refined bismuth raw material at 300-400 DEG C, adding bismuth oxide into the molten bismuth, and fully stirring to enable the bismuth oxide and lead to generate oxidation reaction to generate lead oxide; slagging reaction: adding boric anhydride (B2O3) into the melt, and enabling the boric anhydride (B2O3) to react with the generated lead oxide to generate lead borate slag; slag salvaging and lead removal: stirring for 30-60 minutes at the temperature of 300-400 DEG C in a heat preservation manner, so that the slagging reaction is fully carried out, generated lead borate slag with lower density floats to the surface of a melt, and a lead-containing slag phase is removed in a mechanical or manual slag salvaging manner; and after the slag salvaging process is finished, cooling the bismuth melt under a protective atmosphere until the bismuth melt is solidified to obtain a lead-removed high-purity bismuth product. According to the method, bismuth oxide and boric anhydride are introduced, metal lead is converted into lead borate slag easy to float, efficient and deep separation of lead and bismuth melt is achieved through the density difference, and the lead content can be reduced to 1 ppm or below.

The present invention discloses a combined flotation regulator for high-mud lead-zinc oxide ores and its application method. The combined regulator consists of regulator A and regulator B in a mass ratio of 1:(3-10); regulator A is a high-molecular polysaccharide substance; regulator B consists of B1 and B2, with B1 being 80-90 parts by mass and B2 being 10-20 parts by mass; B1 is sodium silicate, and B2 is at least one of polyaminopolyether methylene phosphonic acid, polyepoxysuccinic acid, and 2-butanephosphonate-1,2,4-tricarboxylic acid. The application method is as follows: grinding the raw ore, sequentially adding sodium carbonate, regulator A, regulator B, and sodium sulfide for slurry mixing, and finally adding a collector for zinc oxide mineral flotation to obtain a zinc oxide coarse concentrate. The present invention can effectively recover zinc oxide minerals in high-mud lead-zinc oxide ores, the reagent components are non-toxic and harmless, the application method is simple, and it is convenient for large-scale production management.

An achromatic imaging optic (20) serves to image an output field (16a) along a beam path (23) of the imaging optic into a target field (14) for use in DUV microlithography. The imaging optic (20) has a plurality of lenses (L1 to L10), each of which contains less than 5% lead oxide. At least one of the lenses (L4, L7) is made of a high-dispersion optical material with an Abbe number less than 55. At least one of the lenses (L1 to L3, L5, L6, L8 to L10) is made of a low-dispersion optical material with an Abbe number greater than 55. This results in an imaging optic whose fabrication is simplified.

The utility model discloses a lead alloy plate grid burr removing device which comprises a burr removing mechanism arranged on a mold base plate, the burr removing mechanism is arranged between a plate grid fixed mold and a plate grid traction roller, and the burr removing mechanism is used for being matched with a plate grid to remove surface burrs. According to the technical scheme, the lead alloy plate grid burr removing device is arranged between the plate grid outlet fixed mold and the separation rotary mold, burrs and burrs generated on the surface of a plate grid are removed in a rotary brush wheel mode through rapid rotation, meanwhile, lead oxide, oil dirt and other foreign matter accumulated on the surface of the rotary mold can be removed, the surface quality of the plate grid is improved, and the production efficiency is improved. And subsequent product production is facilitated.

This invention relates to a method for preparing monocrystalline lead oxide from waste lead paste using a low-temperature pyrometallurgical process, belonging to the field of resource recycling technology for waste lead-acid batteries. The invention involves removing waste positive and negative electrode plates from lead-acid batteries and washing them with water; peeling waste lead paste from the grids of the waste positive and negative electrode plates, grinding and sieving to obtain waste lead paste powder; mixing the waste lead paste powder with a desulfurizing agent, a desulfurization aid, and a crystal form control agent to obtain mixture A; calcining mixture A at 400-600℃ for 2-8 hours, followed by furnace cooling to obtain mixture B; washing and drying mixture B to obtain monocrystalline lead oxide, which is α-PbO, β-PbO, or Pb3O4. This invention directly uses waste lead paste from lead-acid batteries for a one-step low-temperature pyrometallurgical process to prepare monocrystalline lead oxide. The desulfurizing agent can directly desulfurize the waste lead paste, the desulfurization aid can lower the calcination temperature, and the crystal form control agent regulates the crystal structure of the generated lead oxide species, resulting in monocrystalline lead oxide with high purity and good crystallinity.

The present disclosure provides an X-ray sensing device. The X-ray sensing device includes a substrate, a first metal electrode, a second metal electrode, an X-ray photoelectric conversion layer, a third metal electrode, and an insulating layer. The first metal electrode and the second metal electrode are on the substrate and separated from each other. The X-ray photoelectric conversion layer extends continuously on the substrate and directly contacts the first metal electrode and the second metal electrode. The X-ray photoelectric conversion layer includes silicon, amorphous selenium, germanium, cadmium zinc telluride, bismuth iodide, lead oxide, Cs2TeI6 perovskite, CsPbBr3 perovskite, bismuth-based halide perovskite, 6,13-bis(triisopropylsilylethynyl)pentacene, poly(9,9-dioctylfluorene), polydimethylsilane, or combinations thereof. The third metal electrode and the insulating layer are on the substrate, and the third metal electrode is separated from the first metal electrode, the second metal electrode, and the X-ray photoelectric conversion layer by the insulating layer.

The utility model provides a film-coated cover plate and an electronic device comprising the same, the film-coated cover plate comprises a cover plate body, the upper surface of the cover plate body comprises a titanium nitride layer, a diboron trioxide layer and a lead oxide layer which are laminated; wherein the thickness of the titanium nitride layer is 50-100 nm, the thickness of the diboron trioxide layer is 150-200 nm, and the thickness of the lead oxide layer is 30-80 nm. According to the utility model, the titanium nitride bottom layer is plated on the cover plate, so that excellent wear resistance is provided, and the glass substrate can be protected from being scratched and worn. And by introducing diboron trioxide and lead oxide, the optical performance of the coating layer can be adjusted, so that specific optical requirements are met. Meanwhile, titanium nitride and diboron trioxide have good chemical stability and can protect the glass substrate from chemical corrosion. Therefore, the film-coated cover plate provided by the utility model can realize multiple functions by adjusting the thickness and composition of each layer.

The present invention relates to a combined inhibitor for lead-zinc oxide ore in lead-zinc sulfide tailings and its application, belonging to the technical field of lead-zinc oxide ore beneficiation. The combined inhibitor comprises sodium fluorosilicate, sodium sulfide, and sodium humate, wherein the mass ratio of the sodium fluorosilicate, sodium sulfide, and sodium humate is 2:5:1. The present invention also includes applying the combined inhibitor to a reverse flotation recovery process for lead-zinc oxide ore in lead-zinc sulfide tailings. The combined inhibitor and reverse flotation process employed in the present invention achieve simultaneous recovery of lead oxide and zinc oxide while ensuring flotation recovery efficiency, and have the advantages of a simple process and low equipment investment.

The application discloses a kind of high oxidation rate lead-zinc oxide ore aerated sulphidation flotation and tailings discharge process, belong to mineral processing technical field.The method includes the following steps: grinding to lead-zinc oxide ore raw ore, obtain slurry;Sodium sulfide is added to slurry, and under the condition of aerated stirring, sulphidation reaction is carried out, and sulphidation slurry is obtained;Collector and foaming agent are added to sulphidation slurry, and flotation is carried out, and lead concentrate and zinc concentrate are obtained.The application introduces forced aerated stirring in the sulphidation process, strengthens the mass transfer process among gas-liquid-solid three phases, promotes the generation of dense, stable lead sulfide film on the surface of lead oxide minerals, solves the problem of low sulphidation efficiency of traditional sulphidation process.The application is used to treat refractory lead-zinc oxide ore containing Pb 5.59%, Zn 44.02%, oxidation rate more than 90%, and closed-circuit test can obtain qualified lead concentrate with lead grade of 60.72% and lead recovery rate of 79.53%, while lead flotation tailings directly become zinc concentrate with zinc grade of 46.33% and zinc recovery rate of 98.41%, realizing efficient separation of lead and zinc and tailings discharge.

The application discloses a method for comprehensive recovery and utilization of oxidized lead-tin-silver ore, which comprises the steps of pretreatment, oxidized lead flotation, mixed concentrate concentration, table operation and post-treatment. The oxidized lead-silver-tin is recovered through the combined process of flotation and gravity separation, and the process flow is simple, easy to operate, energy-saving, environment-friendly, and good in applicability. The obtained lead concentrate is high in lead grade and high in recovery rate, and tin and silver are comprehensively recovered and utilized in the form of various valuable minerals.

The invention discloses a space anti-radiation glass cover sheet and a preparation method thereof, the glass cover sheet comprises the following raw materials by mass: 50-70 parts of silica, 5-15 parts of sodium oxide, 5-10 parts of lithium oxide, 5-10 parts of diboron trioxide, 3-10 parts of lead oxide, 2-6 parts of cerium oxide, 0.5-6 parts of potassium oxide, and 2-5 parts of alumina. According to the invention, PbO and CeO2 are added into the preparation raw materials, so that the radiation resistance of the glass cover plate is enhanced.

The invention belongs to the technical field of adsorption materials, and particularly relates to a hydroxyl-free lead dioxide-based nitric oxide absorbent and a preparation method thereof. The method comprises the following steps: preparing a mixed solution of perchloric acid and lead perchlorate, standing to form a saturated solution, and performing electrodeposition by using the saturated solution as an electrolyte to obtain a lead dioxide deposition layer; and cleaning, drying and crushing the sediments, drying the sediments in an air dry oven with an air exchange function, and calcining the sediments at high temperature to form a target product. The obtained absorbent has the characteristics of hydroxyl-free structure, nanoscale particle size, high porosity, excellent adsorption performance and the like. Test results show that the absorbent has good selective adsorption capacity on NO2, and the adsorption efficiency can reach 85% or above. The material is suitable for nitrogen oxide interference absorption in the determination process of the hydrocarbon content in coal, and has important application value.

The invention provides a rubber crosslinking accelerator, a sidewall rubber composition, a sidewall rubber material and a preparation method and application thereof. The rubber crosslinking accelerator comprises octachlorocyclopentadiene, triethanolamine and lead oxide, and the mass ratio of the octachlorocyclopentadiene to the triethanolamine to the lead oxide is (1.0-3.0): (0.5-1.5): (1.0-3.0). In the rubber cross-linking accelerator provided by the invention, octachlorocyclopentadiene can be used as a cross-linking agent of diene rubber, lead oxide is used as a chlorine acceptor, triethanolamine is used as a chlorine active agent, and the octachlorocyclopentadiene, lead oxide and triethanolamine have a synergistic effect under a specific ratio, so that part of traditional vulcanizing agents and accelerators can be replaced; a carbon-carbon single bond is generated in the crosslinking process of a rubber matrix, the bond energy of the carbon-carbon single bond is remarkably higher than that of a sulfur-containing bond, and the chemical stability of the carbon-carbon single bond is higher, so that the vulcanized rubber with the carbon-carbon single bond has remarkable advantages in high temperature resistance and acid and alkali corrosion resistance.

A CaB2O4 / Pb3O4 / Mg3B2O6 / C nanocomposite that includes orthorhombic calcium metaborate (CaB2O4), tetragonal lead tetroxide (Pb3O4), magnesium borate (Mg3B2O6), and carbon (C). The CaB2O4 / Pb3O4 / Mg3B2O6 / C nanocomposite includes 55 to 70 atomic percent (at. %) oxygen (O), 5.0 to 12.5 at. % calcium (Ca), 7.5 to 15 at. % magnesium (Mg), 7.5 to 15 at. % lead (Pb), 2.5 to 7.5 at. % boron (B), and 2.5 to 7.5 at. % carbon (C), each based on a total number of atoms in the CaB2O4 / Pb3O4 / Mg3B2O6 / C nanocomposite. The nanocomposite is used in a method of removing organic pollutants and / or heavy metals from water.

The invention relates to the technical field of precious metal extraction, in particular to a method for enriching platinum and palladium from a material containing high copper and sulfur. Oxidizing roasting; leaching with hydrochloric acid; copper precipitation treatment and ammonium chloride precipitation. In the oxidizing roasting stage, roasting is conducted in the oxygen atmosphere, the interference of sulfur on follow-up platinum and palladium enrichment is effectively reduced, a pretreated material and lead oxide are mixed according to the specific mass ratio, platinum and palladium elementary substances are converted into composite oxide easily dissolved in hydrochloric acid, and follow-up leaching of platinum and palladium is facilitated; in the hydrochloric acid leaching link, platinum, palladium and copper in the roasted product are fully dissolved, and the metal leaching rate is increased; during copper deposition treatment, iron powder is added according to the accurate molar ratio of the iron powder to copper ions, the copper ions are converted into copper slag precipitates, and efficient separation of copper, platinum and palladium is achieved; in the ammonium chloride precipitation step, ammonium chloride is accurately added according to the total molar weight of platinum and palladium in the filtrate, so that platinum and palladium are fully precipitated, and crude platinum and palladium products are obtained.

The application belongs to the technical field of polymer materials, and discloses a high-elasticity and anti-cracking crack filling glue and a preparation method thereof. The high-elasticity and anti-cracking crack filling glue comprises the following raw materials: asphalt, thermoplastic elastomer, metallocene polyolefin elastomer, plasticizer, lead peroxide, silane coupling agent and stabilizer. The preparation method is as follows: the asphalt is heated to 180-200 DEG C, and then the thermoplastic elastomer, metallocene polyolefin elastomer, plasticizer, stabilizer, lead peroxide and silane coupling agent are added and uniformly mixed and dispersed by stirring; after the reaction is continuously carried out under the condition of heat preservation and stirring, the crack filling glue is obtained by cooling to room temperature. The crack filling glue of the application contains metallocene polyolefin elastomer, plasticizer and lead peroxide, and the synergistic effect among the three is utilized, so that the obtained crack filling glue has excellent aging resistance, low-temperature performance, adhesion and permeability.

The present invention discloses a process for preparing high-purity lead oxide. By utilizing four core technologies, namely, green leaching using citric acid and hydrogen peroxide, deep purification using a chelating resin and nanofiltration membrane, hydrothermal synthesis of crystal phases, and microwave low-temperature calcination, the process achieves a comprehensive breakthrough in the preparation of high-purity lead oxide. The process achieves a product purity of 99.999% (5N grade), a β-phase content of >99%, and a grain size of 50-80 nm. Compared with traditional methods, the process energy consumption is reduced by 60-70%, the lead recovery rate is >95%, and the raw material cost is reduced by 40%. The process completely eliminates the emission of harmful gases such as SO2, and the heavy metal leaching rate is <0.1%, complying with RoHS environmental protection standards. The process speed is increased by five times compared with traditional crystallization methods, and the resin can be reused more than 10 times. The process achieves the technical goals of "high purity, low energy consumption, and zero pollution," providing a feasible industrialization path for the large-scale green production of electronic-grade lead oxide.

The invention discloses a lead-sodium battery in the field of battery technology, comprising a positive plate, a negative plate, and an electrolyte: the positive plate comprises a positive lead paste and a positive grid, the positive lead paste comprises 100 parts of lead oxide powder, 6 to 12 parts of sulfuric acid, 5 to 15 parts of deionized water, 0.05 to 0.1 parts of short fibers or conductive graphite fibers, and 0.4 to 2 parts of a mixture; the negative plate comprises a negative lead paste and a negative grid, the negative lead paste comprises 100 parts of lead oxide powder, 6 to 12 parts of sulfuric acid, 5 to 15 parts of deionized water, 0.05 to 0.1 parts of short fibers or conductive graphite fibers, and 0.4 to 2 parts of a mixture. The invention discloses a lead-acid battery comprising: a first electrolyte solution comprising 0.01 to 0.6 parts of silicon dioxide, 30 to 50 parts of 98% anhydrous concentrated sulfuric acid, 2 to 7 parts of a sodium compound, 0.1 to 0.15 parts of stannous sulfate, 0.5 to 0.8 parts of phosphoric acid, 1 to 2 parts of vanillin, and 40 to 60 parts of deionized water. The lead-acid battery can effectively achieve good low-temperature resistance and extend the service life of the battery.

The invention discloses a lead-oxygen-silicon composite solid electrolyte material and a preparation method of a lead-oxygen-silicon battery, and relates to the technical field of solid-state batteries, the material comprises the following components by weight: 15-30 parts of a lead-oxygen compound; 40 to 60 parts of a mesoporous silicon substrate; 1-5 parts of a rare earth element dopant; 0.5-3 parts of an alkaline earth metal dopant; the lead-oxygen compound is compounded to serve as an ion conduction core, the rare earth element and the alkaline earth metal doping agent are matched to form a synergistic system, the ion conduction environment can be optimized, the ion migration efficiency can be improved, free lead ions can be anchored through the chemical effect, lead ion dissolution is greatly reduced, and the lead-ion conductivity is improved. The environmental protection property and the ion conduction capability are considered; and meanwhile, a hierarchical porous structure is constructed by virtue of a mesoporous silicon substrate, so that the lead oxide compound is loaded in order in a nano form, a pore channel is accurately filled with a polymer phase, a continuous and stable ion conduction path is formed, and the problems of high interface impedance and discontinuous conduction path of the traditional electrolyte are effectively solved. [1] The synergistic compounding of the rare earth element and the alkaline earth metal dopant in the patent is the core innovation point, the multi-stage material is only used as the auxiliary innovation, and when an embodiment is written, only the contrast of the core innovation point needs to be written, and the contrast does not need to be written by using the multi-stage material.

The invention discloses a method for detecting lead plaster components of a waste lead-acid storage battery. The invention relates to the technical field of waste storage battery resourceful treatment and detection, the method comprises preparation and calibration of an EDTA standard solution, and continuous determination of the content of lead oxide, lead sulfate, metal lead and lead dioxide in lead plaster, through use of formic acid, ammonium carbonate and other reagents and combination of an ultrasonic-assisted extraction technology, the dissolution efficiency is significantly improved, and the content of lead oxide, lead sulfate, metal lead and lead dioxide in the lead plaster is determined. The reaction time is greatly shortened; the selective dissolution of the metal lead is realized by accurately controlling the low-temperature condition and the reaction time, and the interference of lead dioxide is effectively avoided; according to the method, by optimizing a reagent system and introducing ultrasonic-assisted extraction, the dosage of strong acid and the emission of toxic wastes are greatly reduced, the method is more environment-friendly while the result accuracy is ensured, and the method is clear in operation flow, good in reproducibility and suitable for rapid and reliable determination of the components of the lead paste in an industrial recovery scene.

The present invention discloses a numerical simulation method for solid-state oxygen control and mass transfer of liquid lead-bismuth, which can be used for numerical simulation research on the oxygen dissolution and diffusion characteristics of solid lead oxide particles in a mass exchanger during solid-state oxygen control of liquid lead-bismuth. By studying the oxygen supply characteristics of a randomly stacked pebble bed composed of solid lead oxide particles in a mass exchanger, the lead oxide pebble bed is simplified into a homogeneous porous medium, and a porous medium component transport model can be used to complete the numerical simulation of solid-state oxygen control. The present invention avoids the modeling difficulties of simplifying point contacts between lead oxide particles in current public literature, has the characteristics of low computing resource usage and high result reliability, and can be used for preliminary research on solid-state oxygen control experiments of liquid lead-bismuth, which is beneficial for guiding the design of solid-state oxygen control equipment in lead-bismuth piles of fourth-generation reactors.

The invention discloses a preparation method of tetrabasic lead sulfate for a lead storage battery, and relates to the field of lead storage batteries. The preparation method comprises the following steps: carrying out wet grinding on completely dried lead oxide and a sulfur source under lubrication of an organic solvent, carrying out thermal stirring with more organic solvents to trim a crystal form, standing, cooling, filtering, washing and drying to obtain the tetrabasic lead sulfate for the lead storage battery. In some embodiments, ethylene glycol or a compound of ethylene glycol and polyethylene glycol is adopted as a solvent, compared with dry grinding, the efficiency and uniformity are greatly improved, the problems that byproducts are easily generated and crystal grains are easily coarse in water grinding are avoided, meanwhile, rapid crystal form finishing can be carried out at a higher temperature, and the product quality is improved. And rod-like tetrabasic lead sulfate with small particle size is obtained while the overall production energy consumption is reduced.

The application discloses a kind of lead-graphene negative lead paste and preparation method thereof, belong to lead-acid battery technical field;Solve the technical problem that the battery cycle service life of battery failure caused by the poor uniformity of the composition of the existing negative lead paste, negative sulphation;The lead-graphene negative lead paste and preparation method thereof of the application include: step 1, preparation lead graphene lead ingot;Step 2, preparation lead-lead oxide-graphene lead powder;The lead graphene lead ingot casted in step 1 is cut into pieces, and the pure lead lead ingot is cut into pieces, then the lead graphene lead ingot cut into pieces and the pure lead lead ingot cut into pieces are put into a ball mill, air is introduced and grinded, to obtain lead-lead oxide-graphene lead powder;Step 3, preparation lead-graphene composite negative lead paste.The battery prepared by the negative lead paste prepared by the application has a cycle life of more than 500 times, and also solves the problem of negative sulphation.

The application provides a method for preparing lead oxide from copper smelting electric dust ash, and comprises the following process steps: (1) sulfuric acid leaching: adding sulfuric acid; (2) acetic acid leaching: adding acetic acid; (3) ammonia water-sodium acetate leaching: adding ammonia water and sodium acetate; (4) lead precipitation: adding sodium oxalate; (5) lead oxide. The application adopts twice acid leaching, on the one hand, valuable metals in the copper smelting electric dust ash except lead are effectively leached; on the other hand, impurity elements in the acid leaching residue are reduced, and high-purity lead oxide products are prepared subsequently. The lead element in the acid leaching residue is leached by ammonia water-sodium acetate, and under the weak alkaline condition, the leaching of lead is beneficial, and the leaching of other elements such as copper, arsenic and zinc is inhibited.

The invention belongs to the technical field of beneficiation, and particularly discloses a beneficiation method of low-grade refractory lead-zinc oxide ore, which comprises the following steps: crushing and screening raw lead-zinc oxide ore to obtain a material with the particle size of 10-40mm, and carrying out photoelectric separation and waste rock removal to obtain an ore raw material with improved grade; the ore raw materials are finely crushed and then subjected to screening and photoelectric separation, fine ore materials with the particle size being-10 mm are screened, and coarse-grain materials are separated through a cyclone; an overflow object is screened to remove waste rocks, settled sand is screened to obtain a material meeting the particle size requirement, the material is subjected to chemical adding bulk flotation and chemical removal treatment, and bulk concentrate obtained after chemical removal is obtained; and sodium sulfite and zinc sulfate are added for lead-zinc separation treatment, and lead concentrate and zinc concentrate are obtained correspondingly. By means of the two-stage waste pre-throwing and oxygen-sulfur mixed flotation system, the agent consumption is remarkably reduced, slime interference is relieved, the lead-zinc recovery rate is increased, and the method is suitable for efficient comprehensive utilization of the low-grade lead-zinc oxide ore.

This invention discloses a lead-based fast reactor control technology for nuclear power plants, specifically a electrically powered solid oxygen control and regulation system for a lead-based fast reactor, comprising: a liquid lead-bismuth flow pipeline, a solid oxygen source replenishment device, and a liquid level control system. The liquid lead-bismuth flow pipeline includes: a loop inflow pipeline, a loop pipeline expansion bend, a vertical pipeline dissolution chamber, a loop outflow pipeline, a charging tank isolation chamber, and an electric valve. The solid oxygen source replenishment device includes: a motor, a fixed flange, a screw sleeve, a threaded connection structure, a screw, ribs, an upper orifice plate of the charging tank, a charging tank, a lower orifice plate of the charging tank, a locking hole on the upper orifice plate of the charging tank, alumina spheres, lead oxide ceramic spheres, and a charging tank isolation chamber. The liquid lead-bismuth in the liquid lead-bismuth flow pipeline sequentially passes through the loop inflow pipeline, the loop pipeline expansion bend, and the vertical pipeline dissolution chamber, then exchanges oxygen ions with the charging tank before entering the downstream system through the loop outflow pipeline, thus achieving solid oxygen control and oxygen ion exchange.

The present invention relates to a positive active material for all-solid-state rechargeable batteries, a preparation method thereof, a positive electrode for all-solid-state rechargeable batteries, and all-solid-state rechargeable batteries, the positive active material comprising lithium transition metal composite oxide particles and a coating layer positioned on the surface of each lithium transition metal composite oxide particle, wherein the coating layer comprises: coating particles containing a metal oxide; and a low-melting metal oxide including phosphorus oxide, lead oxide, vanadium oxide, or a combination thereof.

The utility model discloses a lead supply device for a cast-weld mold, and relates to the technical field of cast-weld of lead-acid storage batteries. The heating device comprises a lead pan and a heater arranged in the lead pan, an opening is formed in the bottom side surface of the lead pan, and an L-shaped lead discharging pipe is arranged at the opening in a penetrating manner; the vertical section of the L-shaped lead discharging pipe is provided with a flow channel A, the horizontal section of the L-shaped lead discharging pipe is provided with a valve cavity, and the bottom end of the flow channel A is provided with a flow channel B communicated with the valve cavity; a blocking ball and a liquid outlet are arranged on the valve cavity close to the runner B; a valve sleeve is arranged in the valve cavity and provided with a valve rod. According to the utility model, the original mode of immersing the die into the lead pan is changed into the mode of flowing into the busbar from the bottom of the lead pan by gravity; the lead discharging mode is changed into the mode of discharging lead from the bottom, the lead oxide slag with the surface in contact with air has little influence on the cast-weld effect, the surface movement of the lead liquid is little, and a protective film formed by the formed lead oxide slag blocks repeated oxidation of the lead liquid, so that the lead slag is reduced.