| abstract |
The invention relates to a process for obtaining bismuth and Molybdaenitkonzentraten from sulfidic concentrates or ores, in which bismuth is present elementary or sulfidic bonded. The starting material is leached with a sulfuric acid solution containing alkali metal or alkaline earth metal chloride or hydrochloric acid. The leaching is carried out at temperatures from room temperature to the boiling point of the solution and normal pressure continuously or discontinuously in stirred containers or by percolation in a fixed bed. It comes to the selective solution of bismuth minerals at very high yield and high purity. Subsequently, bismuth can be separated by known methods of cementation, hydrolysis or extraction. From the residue flotative molybdenite concentrates can be produced. |