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 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 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.

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.