Study On Making The Germanium Concentrated Ore From The Re-extraction Solution

HeZhang germanium dust and fume in GuiZhou province mainly contains the Zinc, Lead, Germanium, Silver etc. We can get concentrated solution namely re-extraction solution by one stage of sulphuric acid leaching, neutralizing surplus sulphuric acid and eliminating silicon, extracting and re-extracting . This paper studied how to make germanium concentrate mineral from the Ge-Iron superpolymer molecule which formed by hydrolytic Fe(OH)₃ colloid adsorbing germanium anionic complex exclusively , by taking germanium re-extracting solution as the raw material.In co-precipitating experiment, mainly discussed the primary factors influence the germanium precipitation rate: iron/germanium ( quality ratio), the terminal point pH value, the stability time of pH value and temperature. We proved up the interactional factor- iron/ germanium ( quality ratio), the terminal point pH value, the stability time of pH value, temperature how to influence the germanium precipitation rate on the foundation of these single factors experiment, The experiment make clear that factors' proper order which influence germanium precipitation rate is iron/ germanium , the terminal point pH value, pH value stability time and temperature within the scope of the choosed levels. From the orthogonal experiment result we get the optimum technical condition: Iron/ germanium =8;The terminal point pH be 9.1;The pH value stable time be 12 mins;20℃ of temperature. In this case, the germanium precipitation rate would be 99. 91%. By the thermodynamics analysis of co- precipitation system as long as control acidity within the scopes of pH=8. 52-12. 83, We can ensure to form the precipitate of germanium ion comparatively complete under this condition.