Smelting bismuth must undergo smelting and refining in two stages smelting bismuth-containing feedstock is processed through the initial fire or wet, the crude intermediate outputs; bismuth refining is further refined crude bismuth, bismuth fine output. There are many methods of scouring and refining, and different methods are often chosen depending on the raw materials.
First, rough
1. After mixing reverberatory furnace smelting concentrate button pulverized coal concentrates with a reducing agent, replacing the scrap iron agent, soda ash flux and other ingredients, mixing was added reverberatory furnace smelting, output slag, matte and rough inserts.
2. Converter smelting of oxidized slag The precious lead produced by reduction and smelting of lead anode mud is charged into a silver furnace, and the oxidized drill slag produced in the oxidative blowing process is added to the converter for melting. output slag, matte and lead-ming alloy.
3. Lead dross alkaline melting of outputs lead pyrometallurgical refining slag secret Ca, Mg, and an NaOH melt, Ming output lead alloy.
4. Leaching a precipitation method to liquefy the copper converter soot to make the toughness into the solution, and then use the hydrolysis method or the displacement method to separate the secret precipitate, and then melt-cast into a rough
Second, refining
1. Fire refining The crude w is charged into a steel refining pot, and the copper, arsenic , antimony and tin are removed by processes such as refining and refining, oxidative refining, alkali refining, zinc refining, refining and refining, and final refining. , pounds, silver, lead, zinc and other impurities, produce refined tin.
2. Electrolytic refining and toughness is refined by preliminary fire method, and then cast into an anode plate, using an atmosphere salt solution or a silicic acid sulphate solution as an electrolyte to produce an electric bell, and then further refining to a fine sputum.
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