Method for receiving germanium in germanium containing liquid waste

Abstract

The invention discloses a method for receiving germanium in germanium containing liquid waste. According to the method, a resin adsorption principle is adopted for conducting spray tower tail gas adsorption processing on acid gas generated in the germanium chlorination distillation process, and an alkaline solution is obtained; in the optical fiber bar preparing process, germanium in a solution obtained by using sodium hydroxide to process excessive germanium tetrachloride gas and silicon tetrachloride gas is thoroughly absorbed into resin, the germanium is resolved from the resin through acidification, and then the germanium is enriched through ferric salt to obtain germanium concentrates; and finally, chlorination distilling and hydrolysis are carried out to obtain high-purity germaniumdioxide, the germanium in the solution is effectively recovered, and the germanium average recovery rate can reach 95%. By means of the method, the problems about high production cost and environmental pollution which are generated by germanium sedimentation through a

Description

technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to a method for recovering germanium in germanium-containing waste liquid. Background technique [0002] Germanium is a kind of scattered metal with few reserves in nature, mainly associated with lignite, lead-zinc ore and copper mine in South Africa. The proven reserves of germanium in the world are 8,600 tons, which is only enough for more than 40 years based on the current consumption of germanium; germanium is an important strategic resource, which is used in high-tech fields such as aerospace, optical fiber communication, infrared optics, and new energy All have irreplaceable applications. With the development of high-tech in my country and the continuous upgrading of industrial structure, the consumption level of germanium will maintain a rapid growth. [0003] At present, the raw materials for germanium production include two aspects. One is to extract germanium from ...

AI Technical Summary

Problems solved by technology

[0004] The content of germanium in the alkaline solution obtained by absorbing and treating a large amount of acid gas produced during the chlorination and distillation of germanium is 7 to 10 g / L. The conventional treatment method is to add sulfuric acid to the solution to adjust the pH value of the solution to 1 to 2, and then Add tannin to precipitate germanium, filter and calcinate tannin germanium to obtain germanium concentrate. At present, due to the high price of tannin, the production cost is high. During the calcination process, a part of germanium volatilizes in the air, which makes the recovery rate of germanium low and causes Air pollution and other issues

[0005] In the process of preparing optical fiber rods, the excess germanium tetrachloride gas and silicon tetrachloride gas are treated with sodium hydroxide, and the germanium content in the resulting solution is 20-30mg / L. Due to the strong alkalinity of the solution, the germanium content is low. If Treat it with conventional methods, that is, add sulfuric acid to the solution to adjust the pH value of the solution to 1-2, and add tannin to sink germanium. The production cost is higher than the value of germanium in the solution. Therefore, at present, the manufacturers of optical fiber rods do not recover the germanium in the solution. Germanium, resulting in a waste of germanium resources