36 results about "Bismuth lead" patented technology

The invention discloses a process for separating lead and bismuth from a high bismuth lead alloy; and the process uses an alloy formed by casting high bismuth lead anode mud as an anode; and the alloy is fed in an anode bag for pulse chlorination electrolysis in a hydrochloric acid-chlorine salt system. Insoluble matters of the anode fall into the anode bag to form anode mud during electrolyzing; lead is dissolved in solution in a lead-chlorine complex form; and bismuth is separated out from a cathode in a rough bismuth powder form. The anode mud, lead chloride complex solution and rough bismuth powder are respectively obtained after electrolysis. The lead chloride solution is cooled for crystallization to obtain lead chloride; and crystallization mother liquor is returned to prepare electrolyte. The oxidation leaching is performed on the rough bismuth powder by adopting methane sulfonic acid to respectively obtain leaching liquid and leaching slag enriched with antimony and silver. The leaching liquid is replaced and purified for pulse electrodeposition to obtain electric bismuth; and electrodeposition back liquid is returned to leaching of the rough bismuth powder. The process can perform classified extraction on lead and bismuth in the high bismuth lead alloy; silver is enriched; the closed cycle of the technological process is realized; and the process has the advantages of simple technological process, high yield of valuable elements, cleanness and environmental protection.

The invention discloses a preparation method for a cesium lead bromide inorganic perovskite thin film and a photovoltaic device based on the cesium lead bromide inorganic perovskite thin film. An unstable yellow oblique-phase CsPbI3 thin film is prepared by employing a one-step solution method and then is converted to a stable black cubic-phase CsPbBr3 thin film by employing a Br2 steam thermal injection gas-phase deposition method. Gas-phase exchange reaction of halide ions is utilized, I<-> in CsPbI3 is substituted by Br<-> with smaller radius, the purpose of lattice shrinkage, phase changesuppression and stability improvement are achieved, the bottleneck problem that Br solubility of a traditional one-step solution method is limited can be effectively solved, and the problems that thethin film is easy to fall during immersion of a two-step solution method also can be prevented; and meanwhile, the prepared CsPbBr3 thin film is also used as a light absorption layer to prepare an FTO / c-TiO2 / m-TiO2 / CsPbBr3 / C perovskite solar cell with an all-inorganic structure, the photoelectric efficiency of a battery in initial batch reaches 3.23%, and the battery shows favorable long-term stability.

The invention relates to a lead-free and bismuth-free conductive silver paste. The lead-free and bismuth-free conductive silver paste includes: 50-80% of conductive silver powder, 1-10% of glass powder, 1-10% of organic resin, and 10-30% of organic solvent, wherein the glass powder is lead-free and bismuth-free glass powder, and the mass percent of SnO in the glass powder is 28-80%. The invention also relates to a method for preparing a silver grid line of a silicon solar cell by employing the above lead-free and bismuth-free conductive silver paste and a silicon solar cell. The glass powder is lead-free and bismuth-free and employs SnO as the main body, thus, the conductive silver paste employing the glass powder is lead-free and bismuth-free, a silicon nitride anti-reflecting layer on the surface of the silicon solar cell can be etched through in a sintering process, and the electrode silver grid line with low ohmic contact resistance can be formed on the surface of the solar cell after sintering.

The present invention relates to a device and method for studying the plugging law of oil well cement ring channeling, wherein the device for studying the plugging rule of oil well cement ring channeling includes a plugging agent injection device, an oil well model, multiple groups of bismuth-lead-tin alloy sheets, steel column; the intermediate container of the plugging agent injection device is connected to the oil well model, and the perforations of the oil well model are respectively connected to a core with different permeability; The shaft is screwed between the top cover and the base, and the steel column is used to seal the perforation; multiple sets of bismuth-lead-tin alloy sheets with a width of 25mm, and one group is multiple bismuth-lead-tin alloys with the same thickness, the same length, and different bending shapes one group of bismuth-lead-tin alloy sheets with the same length, same shape, and different thickness; one group of bismuth-lead-tin alloy sheets with the same thickness, same shape, and different length. The invention can observe the gelation status of various plugging agents in cracks of various shapes, and the migration rule of the plugging agents in the rock core and cement sheath in the pore space.

The invention discloses a treatment method for high-bismuth lead anode mud or bismuth slags. The method is characterized in that SnCl4 and HCl are used as a leaching agent; the high-bismuth lead anode mud or bismuth slags are directly leached through oxidization to obtain bismuth-containing lixivium and leaching residue enriched with gold and silver; then the bismuth-containing lixivium is subjected to bismuth powder reduction purification; and silver ions in the lixivium are substituted into the residue; a certain amount of a precipitant is added in the liquid subjected to substitution, and the acidity of the liquid is adjusted with H2SO4, so that As3+, Pb2+, Cu2+ and Sb3+ in the solution are precipitated in the residue; and Pb2+ and As3+ ions in the liquid subjected to precipitation are further removed with a double-salt purification method. The purified liquid is subjected to diaphragm electrodeposition for extracting bismuth; after the bismuth is extracted, cathode liquid and anode liquid are mixed, and the solution is subjected to substitution treatment by using tin powder as a purification agent; and the liquid subjected to substitution is subjected to acid adjustment and then returns to be used for leaching the high-bismuth lead anode mud as a leaching agent. By adopting the technique, bismuth, lead, stibium, arsenic and copper in the high-bismuth lead anode mud or bismuth slags are extracted in a classified manner; gold and silver and gathered; closed-loop circulation of a technique process is realized; and the treatment method has the distinctive advantages of being high in raw material adaptability, simple in technique process, high in valuable element recycle rate, clean and environment-friendly.

The invention relates to a method for recycling bismuth in bullion lead, and belongs to the field of the metallurgical technology combining a pyrogenic process with a wet process. The bullion lead is placed in a vacuum furnace first, vacuum distillation is carried out to separate lead, antimony, bismuth and copper, primary high bismuth lead and silver are produced, the produced primary high bismuth lead is placed in the vacuum furnace, vacuum distillation is conducted again to separate lead, antimony, bismuth and copper under control of the previous condition, and secondary high bismuth lead and residual silver are produced; the obtained secondary high bismuth lead and lead bullion ingredients are thrown into an anode pot to be cast into a bismuth anode plate, the bismuth anode plate is put into an electrolytic bath, mixed electrolytic refining is conducted on the bismuth anode plate together with the main process of lead electrolysis, and dissolved-out lead and washed high bismuth anode slime are obtained; the obtained high bismuth anode slime is subjected to reduction smelting and converting to produce crude bismuth; fire refining is carried out on the obtained crude bismuth, sulphur is added to the crude bismuth to remove copper, the crude bismuth is oxidized to remove arsenic and antimony, chlorine gas is led to the crude bismuth to remove lead, zinc is added to the crude bismuth to remove silver, finally caustic soda and saltpeter are added for refining, and a bismuth ingot product meeting national standards is produced. The technological process of the method is refined and simple.

The invention relates to high antimony content lead electrolysis anode mud cleaning equipment and a cleaning method thereof. The cleaning equipment comprises an inlet receiver, a scrubbing machine anda collapsing conveying machine; the inlet receiver is connected with one end of the scrubbing machine; the other end of the scrubbing machine is connected with the collapsing conveying machine; and the scrubbing machine comprises a scrubbing rack, auxiliary flat laying devices, cleaning conveying devices, a scrubbing device and an auxiliary erecting device. For the high antimony content lead electrolysis anode mud cleaning equipment, by adopting a horizontal type scrubbing manner, an anode plate is horizontally placed; by using a manner of continuous roll scrubbing with crushing rolls, scraping rolls and scrubbing rolls, through an operation manner of rolling for crushing as well as simulating manual scraping and scrubbing, a high antimony content lead electrolysis anode plate can be cleanly cleared; and the equipment is high in automation degree, simple in structure, low in energy consumption and high in production efficiency and avoids a danger that a worker is exposed to toxic heavy metals.

The invention relates to a method for recovering lead, silver and copper by using precious lead as a raw material, and belongs to the technical field of combining fire method and wet method. Firstly, noble lead is separated from lead, antimony, bismuth and copper by vacuum distillation to produce high-bismuth lead and precious silver; the obtained high-bismuth lead is electrolyzed with high-bismuth lead to obtain precipitated lead, and the obtained precious silver is refined in a converter to produce Crude silver, and according to the length of converter refining time to obtain the early converter slag and converter late slag; the obtained coarse silver is electrolyzed with silver to obtain silver ingots, and the obtained converter early slag and converter late slag are respectively crushed to a particle size < 6mm, and then finely ground Converter slag fine powder is obtained by forming a powder with a particle size of less than 100 mesh, and then adding sulfuric acid solution to the converter slag fine powder for leaching, and obtaining leaching slag and copper sulfate solution after leaching is completed. The method improves the process flow for treating precious lead materials, and has the effects of refining and concise process flow, saving energy and reducing consumption, and optimizing the production environment.

A treatment technology for high-bismuth and high-lead anode slime comprises the following steps: carrying out oxygen-rich reduction smelting on the high-bismuth and high-lead anode slime to produce noble bismuth, slag (lead slag) and soot (crude antimony white); delivering the lead slag to a lead system, delivering the crude antimony white to a bismuth system, carrying out vacuum distillation on the noble bismuth to produce crude silver, crude bismuth and tellurium slag, pyro-refining the crude bismuth to produce refined bismuth, delivering the tellurium slag into a tellurium recovery workshopto produce refined tellurium, blowing the crude silver a silver-smelting furnace to produce crude silver and bismuth slag, delivering the crude silver into a silver electrolysis workshop to produce silver and gold, delivering the bismuth slag into a converter, carrying out reduction matte smelting to produce noble bismuth and matte slag, returning the noble bismuth to the vacuum distillation process, and delivering the matte slag to an oxygen-pressure leaching copper electrodeposition process to produce cathode copper and lead-silver slag respectively, wherein the cathode copper is sold as aproduct, and the lead-silver slag is returned to the lead smelting system. The technology has the characteristics of simple process, high production efficiency, short cycle, high recovery rate of valuable metals, and low production cost.

A low-pressure mercury-vapor discharge lamp is provided with a discharge vessel (10). The discharge vessel (10) encloses a discharge space (11) provided with a filling of mercury and an inert gas in a gastight manner. The discharge vessel (10) is provided with an amalgam which communicates with the discharge space (11). The discharge lamp comprises means for maintaining an electric discharge in the discharge vessel (10). The discharge lamp is characterized in that the amalgam comprises a bismuth-lead amalgam having a lead content in the range from 35 <= Pb <= 60 at. %, a bismuth content in the range from 40 <= Bi <= 65 at. %, and a mercury content in the range from 0.05 <= Hg <= 1 at. %. Preferably, the amalgam additionally comprises gold with a gold content in the range from 0.1 <= Au <= 20 at. %. Preferably, the gold content is in the range from 8 <= Au <= 12 at. %. The lamp according to the invention exhibits a comparatively high initial radiation output and a short run-up time in combination with a relatively high radiation output at nominal lamp operation, which is achieved in a comparatively large temperature interval.

The invention belongs to the technical field of sulfide ore beneficiation, and particularly relates to a preparation method of a bismuth lead sulfide ore flotation inhibitor and a use method thereof.The bismuth lead sulfide ore flotation inhibitor is prepared by the following steps: step 1, in parts by mass, preparing and getting 10 to 20 parts of halogenated carboxylic acid, 30 to 60 parts of imidazole, 30 to 60 parts of carbon disulfide, and 25 to 50 parts of organic solvent; and step 2, uniformly mixing the raw materials of the first step, conducting reacting on the mixture at 0 to 95 DEGC for 2-12 hours, so as to obtain the bismuth lead sulfide ore flotation inhibitor. The obtained product has inhibitory effects on primary and secondary sulfide ore of bismuth and lead, and can be applied to flotation separation of molybdenum bismuth ore, molybdenum lead ore, lead zinc ore, copper lead ore and the like, especially for bismuth-containing sulfide ore or non-bismuth sulfide ore. Thepreparation method of the flotation inhibitor is simple in operation, mild in process conditions, low in raw material cost, convenient in use and less in environmental pollution, and meets industrialproduction requirements.

The invention discloses a 1,8-dihydroxy anthraquinone lead compound which is shown as the structural formula (I). The 1,8-dihydroxy anthraquinone lead compound can be used as a combustion catalyst, has a good catalytic effect on a biradical solid propellant or a modified biradical solid propellant, and can significantly increase the burning rate of the biradical solid propellant or the modified biradical solid propellant and reduce the pressure index.

A method for preparing barium-lead-bismuth-oxygen superconducting and electronic materials, the steps are: a. according to the stoichiometric ratio of preparing barium-lead-bismuth-oxygen BaPb1-xBixO3, 0≤x≤1.0, weighing raw material Ba(OH)2 8H2O , Pb3O4, NaBiO3 2H2O and Bi2O3, wherein the molar ratio of NaBiO3 2H2O and Bi2O3 is 0.5 to 2.5:1; the raw materials are ground into powder and mixed evenly as mixed raw materials; another potassium nitrate and sodium nitrate with a molar ratio of 1:1 are selected The mixture is used as a molten salt, and the molar ratio of the molten salt to the prepared BaPb1-xBixO3 is 10 to 30:1; b. mix the mixed raw materials and the molten salt evenly, heat at 100 to 200°C for 2 to 3 hours, and then heat the mixture at 400 to 200°C. 600°C, keep warm for 10-20 hours, and cool; c. Rinse and dry. The prepared barium lead bismuth oxide BaPb1-xBixO3, x=0 is a metal conductor electronic material; 0.05≤x≤0.30 is a superconducting material; 0.30<x≤1.0 is a semiconductor material. The method has low preparation temperature, short cycle, simple process and is convenient for industrialized production; the chemical composition of the obtained product is easy to control, the composition is stable, the particle size is small and uniform, and the performance is stable.