36 results about "Bismuth lead" patented technology

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 disclosed Ga-Ge-Bi-Pb fluorescent glass material doped with rare earth is prepared by: mixing and fusing the Ga2O3, Bi2O3, GeO2, lead-contained compound and rare earth compound to obtain the fused glass liquor; clearing and pouring the liquor into the mold to obtain the glass; putting the glass rapidly into a muffle furnace with temperature as the glass transformation temperature for heat preservation; finally, cooling to room temperature. This product can be manufactured into different shape, and has wide application as the gain medium.

The invention relates to a method for recycling lead, sliver and copper by taking noble lead as a raw material, and belongs to the technical field of combining a pyrogenic process with a wet process. The method comprises the following steps: firstly, carrying out vacuum distillation onto the noble lead for separating lead, stibium, bismuth and copper to produce high-bismuth lead and noble sliver; carrying out high-bismuth lead electrolysis onto the obtained high-bismuth lead to obtain separated-out lead, producing crude sliver by carrying out converter refining onto the obtained noble sliver, and refining noble lead byproducts obtained according to converter refining time length to obtain converter early-stage slag and converter later-stage slag; and electrolyzing the obtained crude sliver by crude sliver to obtain a sliver ingot, respectively crushing the obtained converter early-stage slag and converter later-stage slag until grain size is less than 6mm, then grinding to form powder with grain size being less than 100 meshes to obtain converter slag fine powder, and adding the converter slag fine powder into sulfuric acid liquor for leaching, and thus obtaining leaching slag and copper sulfate liquor after leaching is completed. The method disclosed by the invention improves treatment process flow of the noble lead material, and has the effects that process flow is refined and concise, energy is saved and consumption is lowered, and production environment is optimized.

The invention provides a light absorption material of perovskite crystal of methyl amino lead iodide bismuth (for short methylamine bismuth lead iodine) and a preparation method thereof. A general formula is CH3NH3BixPb1-xI3, wherein x is 0.01-1. The crystal of the perovskite crystal light absorption material formed calcining the material under the condition of water-insulation and oxygen-insulation has the same crystal structure and similar light absorption performance of methylamine iodine lead CH3NH3PbI3. The method uses bismuth atom to substitute lead atom in CH3NH3PbI3 effectively, and the crystal structure is not changed. The lead content is reduced effectively by means of controlling the raw material ratio of bismuth to lead. The crystal material with perovskite structure of methylamine bismuth lead iodine CH3NH3BixPb1-xI3 prepared by the invention can be used for substituting the crystal material of methylamine lead iodine CH3NH3PbI3 which is used as an absorbed layer of a perovskite solar cell. Moreover, the material stability can be improved effectively, the lead content can be reduced, and the material toxicity can be reduced.

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 relates to a method for electrolyzing and recycling valuable metal from high-bismuth lead bullion, and belongs to the field of nonferrous metallurgy. The method comprises the steps that the lead bullion is rationally combined, and compositions of an anode plate are properly controlled; the current density is properly reduced, and the cell voltage is controlled; lead ions are supplemented in time, and compositions of electrolytes are ensured; a washing operation system of the anode plate is adjusted; final refining is carried out; and a qualified lead ingot is obtained. According to the method, the requirement for lead and bismuth contained in the lead bullion in an existing production technology is broken through, and the method allows the lead-contained range in a lead anode to be expanded to more than 85% and the bismuth-contained range to be expanded to smaller than or equal to 10%; and through electrolytic refining, the qualified lead ingot is produced, and the aim of rapidly recycling the valuable metal such as the bismuth, gold and silver is achieved.

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 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 high-purity bismuth-lead alloy and a preparation method thereof. The preparation method comprises the steps that a compounding step is carried out, specifically, according tothe composition design of the bismuth-lead alloy, massive lead materials and bismuth materials are used as raw materials for compounding and mixing; a smelting step is carried out, specifically, themixed raw materials are smelted under vacuum; a cooling step is carried out, specifically, alloy melt obtained after smelting is subjected to cooling; a filtering step is carried out, specifically, the alloy melt after cooling is subjected to filtration treatment; and a casting step is carried out, specifically, the filtered alloy molt is casted into a mold under vacuum and cooled to obtain an alloy ingot. According to the high-purity bismuth-lead alloy and the preparation method thereof, through the combination of high-temperature vacuum melting and low-temperature vacuum casting, oxides andother metal impurities in the lead and bismuth raw materials can be efficiently and advantageously removed, so that the purity of the alloy reaches above 99.998%. And through timing electromagnetic stirring and controlling of the weight of a single alloy ingot, the overall composition of the alloy is uniform and controllable, and the problem of excessive composition segregation is avoided.

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 relates to a lead-free piezoelectric thin film material and a preparing method thereof. The problem of harms caused in the preparation, using and abandoning processes of a lead-based thin film material to the ecological environment and the human health is solved. According to the technical scheme, the lead-free piezoelectric thin film material is a sodium bismuth titanate-cobalt acid bismuth lead-free piezoelectric thin film material (1-(i)x(/i))Bi0.5Na0.5TiO3-(i)x(/i))BiCoO3(BNT-BC), wherein (i)x(/i) indicates the mole number, and the (i)x(/i) is larger than 0 and smaller than or equal to 0.06. According to the preparing method, PLD is adopted for preparing a sodium bismuth titanate-cobalt acid bismuth lead-free piezoelectric thin film. The lead-free piezoelectric thin film material is simple in component, abundant in raw material, easy to prepare, good in product quality and stable and excellent in performance, is an innovation on the lead-free piezoelectric thin film material, and has the good economical and social benefits.

The present invention relates to a Sn-Pb-Bi ternary alloy solder composition. In the present invention, since an amount of Bi is 5 wt% or less, and a melting point of the composition is determined in146-225 degree centigrade, soldering at a lower heating temperature than a common temperature is possible. Breaking phenomenon due to the inclusion of bismuth is not found.