Study On Extraction Of Germanium And Indium From Annealed Zinc Sediment

Indium and germanium are the sustained materials of current high technology. They are of important effect in the field of computer, communication, spaceship, energy, medical and so on. Without independent field, pittance of indium and germanium is mixed with lead, zinc and aluminum .during the process of annealing these metals, plenty of indium and germanium enters the sediment to be deserted, or enters the deposed water to be flowed away, which leads to the environment pollution. So the recovery and utility of indium and germanium from industrial sediment must be studied and developed, at the same time, they are the imperious need of environment protection .While the current technical which is used to extract germanium and indium by kaojiao deposition or extraction meet many practical problems, such as low recovery and high production cost So it is necessary to lower production cost and increase the recovery and utilize the secondary resource fully.During the process of annealing the zinc, there is plenty of neutralized ex-iron sediment, in which there are abundance of indium and germanium. With high percent of iron, it is difficult in the recovery of indium and germanium, and the sediment is deserted, so it is the need of resource ^utilization to study the recovery of indium and germanium from the zinc sediment and neutralized ex-iron sediment.In the article, the material is annealing zinc sediment, and the article scientifically studies the effect of different factors such as acidity, auxiliary rate, temperature to the technical of germanium. And the technical condition of drenching indium by sodium hydroxide. At the same time, the noxious lead can be reclaimed from the sediment, and which is converted into the industrial production. Many important results are obtained, the main studied contents and results are as follows :1. According to the high percent of iron, indium and germanium can deposited with iron collectively. The deposit coefficient, can surpass 99%.2. The distribution of germanium and hydrochloric acid is studied in the distillation of ferric hydroxide with chloric distilling, and the concentration distribution graph is obtained.IX3. According to the distilled GeCU solution, which is neutralized by the concentrated ammonia water under normal condition, we can get the better effects.4. The conditions of drenching the indium out from the ferric hydroxide with sodium hydroxide are studied, and ninety percent of indium can be drenched out with saturation sodium hydroxide for three times.5. The conditions of extraction the indium from the solution with indium are studied, and the sponge indium is obtained.6. The acidity of Tannic acid solution depositing and the Tannic acid solution depositing with cadmium, copper, zinc, germanium is studied respectively, and the acidity condition of germanium depositing in tannic acid solution separately is found.7. Four factors of acidity, auxiliary rate, temperature, time of germanium reacts with Tannic acid, the experiments indicated the optimal technical conditions.8. Study on the acidity, auxiliary, temperature, time of the germanium reacts with kaojiao. The experiments indicated the optimal technical conditions.9. Study on the production of lead stearate from sediment containing lead, the optimal technical conditions of converting lead sulfate to lead carbonate are obtained.