Germanium recovering method

Abstract

The present invention is germanium recovering method in metallurgical technology. Low-grade weak acid germanium material is first neutralized and converted via adding white coal powder, lime slurry, wood dust and water to regulate pH to 8-9, and stoved or wind dried to produce lumpy material; the lumpy material is roasted in furnace with coke and white coal to volatilize and reduce germanium compound; and the germanium containing smoke and dust is cooled in the flue and collected in smoke and dust collector to obtain the mixture with relatively high germanium content. The method of the present invention may be applied in recovering germanium from low-grade weak acid germanium material with germanium content below 0.5 %, and the collected smoke and dust has germanium content increased to 15-20 %.

Description

technical field

[0001] The invention relates to a method for recovering germanium, which belongs to the technical field of metallurgy. Background technique

[0002] At present, during the processing of optical fiber cables, there will be a corner abrasive containing germanium, silicon, etc., which is called optical fiber germanium material, and its germanium content is generally 5% to 10%. Germanium has the value of recycling. In the prior art, the method of using optical fiber germanium material to recycle germanium adopts wet acid leaching, and then absorbs it by the traditional production process of tannin sinking germanium. During production, the optical fiber germanium material is first mixed with hydrogen Soak hydrofluoric acid and sulfuric acid together, heat to 85-95°C, soak for 2-4 hours, and then cool to 40°C, filter out impurities, take the filtered solution and absorb germanium with tannin dissolved in boiling water. The precipitate in the solution can be filter...