18 results about "Lead oxide" patented technology

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 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.

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.

This invention discloses a positive electrode paste for lead-acid batteries, its preparation method, and its application, belonging to the field of battery technology. The raw materials for the positive electrode paste include the following components: lead powder, sulfuric acid solution, deionized water, synthetic fiber, bismuth trioxide, conductive agent, polytetrafluoroethylene dispersion (based on solid content), and other additives. The lead powder is mainly composed of a mixture of elemental lead and lead oxide. The concentration of the sulfuric acid solution is 1.3~1.4 g / mL. The conductive agent is selected from conductive carbon black and conductive graphite. Through the combined effect of the above components and their contents, this invention enables the positive electrode paste for lead-acid batteries to possess high-rate discharge performance, high structural stability, and long cycle life. Lead-acid batteries prepared using this paste maintain high energy density while also exhibiting excellent electrical performance and cycle stability, solving the problems of low power density and poor cycle performance in traditional lead-acid batteries.

The application relates to the technical field of anti-radiation glass, and discloses anti-radiation glass for low-orbit spacecrafts, a preparation method and application thereof. The anti-radiation glass for low-orbit spacecrafts comprises the following raw materials in parts by mass: quartz sand 45.5-68 parts, aluminum hydroxide 8.41-10.25 parts, boric acid 8.86-24.62 parts, carbonate 24-43.69 parts, cerium dioxide 0.6-2.1 parts, gallium sesquioxide 0.2-1.2 parts, antimony sesquioxide 0.5-1 part, nitrate 2-4.6 parts, molybdenum dioxide 0.5-1.4 parts, lead oxide 0.8-2.2 parts, tetrabutyl titanate 3.4-12.75 parts, and kerosene 0.2-0.8 part. Through the technical scheme, the problem of insufficient anti-radiation performance of the glass for low-orbit spacecrafts in the related art is solved.

The application discloses a Pb (1‑x) Ln x (Zr 0.52 Ti 0.48 )O3-based piezoelectric thick film material and a preparation method thereof. The implementation scheme is as follows: lead oxide, zirconium dioxide, titanium dioxide and oxide of a lanthanide element are fired to form pre-fired powder; lead acetate trihydrate, tetrabutyl titanate, oxide of the lanthanide element and zirconium n-propyl alcohol or zirconium isopropyl alcohol are mixed into a precursor solution by a sol-gel method; the powder and the gel are mixed to form slurry, the slurry is spin-coated on a substrate, and after drying and pyrolysis treatment, annealing is performed in an air atmosphere or an ACB atmosphere compensation, so as to obtain Pb (1‑x) Ln x (Zr 0.52 Ti 0.48 )O3 piezoelectric thick film with a thickness greater than 10 microns. The application has the advantages of high crystallinity, good compactness, high breakdown field strength, high electrical comprehensive performance, simple process and good repeatability, and can be used in micro-electro-mechanical system (MEMS), micro-actuator, sensor and ultrasonic transducer.

This invention discloses a carboxyl-modified lanthanum-cerium co-doped lead dioxide catalytic electrode, its preparation method, and its application, belonging to the field of wastewater treatment technology. The preparation method of the carboxyl-modified lanthanum-cerium co-doped lead dioxide catalytic electrode of this invention includes the following steps: mixing lead salt, cerium salt, lanthanum salt, and sodium fluoride, adjusting the pH to acidic to obtain an electrodeposition solution; using a carbon substrate as the anode and the electrodeposition solution as the electrolyte, performing electrodeposition to obtain a LaCe / PbO2-C electrode; immersing the LaCe / PbO2-C electrode in a carboxyl-containing organic acid solution to carry out a carboxyl modification reaction, completing the preparation. The electrochemical system based on the CA@LaCe / PbO2-C catalytic anode constructed in this invention is effective in treating favipiravir and Cu... 2+ Regarding mixed wastewater, it can achieve efficient degradation of organic pollutants and simultaneous recovery of heavy metal ions.

This invention belongs to the field of high-purity inorganic material preparation technology, and relates to a method for preparing ultra-high-purity lead fluoride from lead oxide based on supercritical complexation extraction. Using lead oxide as raw material, lead acetate is synthesized through acetylation, deep purification through SCC-CO2 supercritical complexation extraction, and fluorination precipitation to prepare 5N-grade ultra-high-purity lead fluoride. Lead acetate is a strongly polar ionic organic salt with high lattice energy, and it is almost insoluble and does not leak in the SCC-CO2 system. Cu, which is present as an associated component in the raw material... 2+ Fe 3+ Zn 2+ Cd 2+ Bi 3+ Impurity metal ions, under the action of a complexing agent, form weakly polar, fat-soluble metal complexes, which are then efficiently extracted by supercritical CO2 and continuously carried out of the system, achieving deep separation of lead acetate from impurities. The purified ultra-high purity lead acetate reacts with ultra-high purity hydrofluoric acid to directly produce 5N grade ultra-high purity lead fluoride with a purity ≥99.995%. This method is suitable for industrial production due to its simple process, environmental friendliness, high impurity removal depth, and stable preparation of ultra-high purity lead fluoride.

This invention discloses a method for preparing dimethyl sulfoxide, relating to the field of electrochemical technology. The method for preparing dimethyl sulfoxide includes the following steps: passing gaseous dimethyl sulfide and water vapor into the anode of an electrochemical reaction device, passing water into the cathode of the electrochemical reaction device, and applying a DC voltage between the anode and cathode to carry out an electrochemical reaction to obtain a product containing dimethyl sulfoxide; wherein, the anode includes a composite matrix and a perfluorosulfonic acid ionomer loaded on the surface of the composite matrix; the composite matrix includes a first substrate and an anti-corrosion coating disposed on the surface of the first substrate, the anti-corrosion coating being made of at least one of ruthenium oxide, iridium oxide, antimony-doped tin oxide, tantalum oxide, and lead oxide, which solves the problems of high energy consumption, low product yield and selectivity in the preparation of dimethyl sulfoxide by liquid-phase electrochemical oxidation method in the prior art.

This invention discloses a method for recovering zinc oxide from flotation tailings of lead-zinc oxide ore. The method employs a physical desliming-rapid flotation-coarse grinding-flotation-zinc concentrate regrinding followed by desulfurization process. Desliming is carried out using a combination of strong dispersion stirring, weak stirring, and weak stirring siphon desliming, effectively removing fine mud from the zinc oxide and reducing zinc loss in the mud. A portion of the coarse, easily floatable zinc oxide particles is then rapidly selected as high-quality zinc oxide concentrate. The incompletely liberated zinc oxide is further processed by grinding followed by flotation. The high-quality zinc oxide concentrate produced by rapid flotation is combined with the low-quality zinc oxide concentrate obtained after desulfurization to form a qualified zinc concentrate. This invention features a simple process flow, low cost, and wide applicability, achieving a zinc oxide recovery rate of 72-75%. It shows promising application prospects for the recovery of zinc oxide with high sulfur content.

There is provided a piezoelectric ink formulation for preparation of a piezoelectric device, the formulation comprising: (i) perovskite-based powder, (ii) optionally a dispersing agent; (iii) optionally a sintering agent; (iv) a binding agent; (v) optionally lead oxide; and (vi) a solvent. Also provided are a method of preparing a piezoelectric device and said piezoelectric device for providing haptic feedback.

The application discloses a perovskite thermistor material, a preparation method and application thereof. The perovskite thermistor material is prepared from barium carbonate, bismuth oxide, lead oxide, sodium carbonate and potassium carbonate as raw materials by a solid phase reaction method, and has a chemical formula of (Ba 1‑y Re y )(Bi 1‑x R x )O3. In the formula, Re=Pb, 0≤y≤0.1; R=Na, K, 0≤x≤0.15. The perovskite thermistor material has a single perovskite structure. The material can be sintered into a porcelain at a low temperature, and the oxygen vacancies can be effectively adjusted under different sintering atmospheres, so that the material constant and the resistivity of the thermistor ceramic can be significantly reduced, and the perovskite thermistor material can be used for measurement and control in a temperature range of 40-160K at a low temperature.

Disclosed is a thick film resistor paste which, while using a lead borosilicate glass as an insulating material, has no appearance crack abnormality and has sufficient surge resistance, a thick film resistor body using the thick film resistor paste, and an electronic component provided with the thick film resistor body. The thick film resistor paste contains a ruthenium oxide-containing glass powder and an organic vehicle. The ruthenium oxide-containing glass powder contains 10 mass% or more and 60 mass% or less of ruthenium oxide. In the glass composition, 60 mass% or less of silicon oxide, 30 mass% or more and 90 mass% or less of lead oxide, and 5 mass% or more and 50 mass% or less of boron oxide are contained with respect to 100 mass% of the glass components. The total content of the silicon oxide, the lead oxide, and the boron oxide is 50 mass% or more with respect to 100 mass% of the glass components.

This invention relates to the field of lead-acid battery technology, and discloses a modified lignin-based negative electrode paste for lead-acid batteries and its preparation method. The negative electrode paste comprises lead oxide powder, sulfuric acid solution, deionized water, modified lignin, barium sulfate, short fibers, humic acid, eugenol, acetylene black, graphene carbon nanotube composite material, and a surfactant. The modified lignin is obtained through oxidation, sulfonation, and metal ion chelation modification, with the metal ions including bismuth and antimony ions. The preparation method employs a dry-mixing-water-mixing staged process. This invention increases the active sites of lignin through oxidation and sulfonation, improves stability and imparts electrochemical activity through metal chelation, and, synergistically, enhances the antioxidant effect of eugenol and the conductive network of the graphene carbon nanotube composite material, significantly improving the battery's low-temperature performance, cycle life, and capacity retention.

This application provides a fire assay method for determining the gold content in gold-containing resin, belonging to the field of precious metal analysis and detection technology. Before fire assay analysis, the gold-containing resin is immersed in anhydrous ethanol. The anhydrous ethanol disrupts the cohesive force of the gold-containing resin, preventing splattering during the roasting stage. After immersion, the resin is transferred to a ceramic boat for staged roasting to ashing, eliminating the influence of particulate carbon on the subsequent fire assay analysis. Finally, the roasted resin is transferred to a clay crucible, where sodium carbonate, borax, lead oxide, silicon dioxide, and flour are added and stirred thoroughly. A covering agent is then applied, followed by melting, ash blowing, and gold separation to determine the gold content in the resin. This method achieves rapid and accurate determination of the gold content in gold-containing resin, improving the accuracy and stability of the detection results.

This invention discloses a method for efficient extraction of lead and zinc from oxidized lead-zinc ore at room temperature and pressure, belonging to the field of non-ferrous metal hydrometallurgical technology. The invention includes (1) adding a mixed solution of ammonium chloride and citric acid as a leaching agent to the oxidized lead-zinc ore and conducting a stirring reaction at room temperature and pressure; (2) after the reaction is completed, performing solid-liquid separation to simultaneously leach lead and zinc. By using a mixed solution of citric acid and NH4Cl as a leaching agent, this invention can effectively achieve efficient leaching of valuable metals such as lead and zinc from oxidized lead-zinc ore under mild conditions, while simultaneously inhibiting the dissolution of impurities (such as iron and silicon). This avoids the high energy consumption of traditional high-temperature and high-pressure methods and the problem of silica gel formation that easily affects solid-liquid separation in traditional acid leaching. It achieves efficient extraction of oxidized lead-zinc ore resources under normal pressure and temperature conditions, providing a scientifically reliable new approach for the resource utilization of oxidized lead-zinc ore.