Method for extracting germanium from fluorine-containing germanium concentrate through distillation

Abstract

The invention provides a method for extracting germanium from fluorine-containing germanium concentrate through distillation. The method includes the following steps that a fluorine fixing agent is added into a hydrochloric acid solution to be evenly dispersed, and a mixed system A is obtained, wherein the fluorine fixing agent is an aluminum compound; the fluorine-containing germanium concentrateis added into the mixed system A, stirring is carried out for 0.8 h-1.2 h, and a reaction system B is obtained; after it is confirmed that the concentration of hydrogen chloride in the reaction system B is 6.0 mol / L-8.0 mol / L, chlorine and water vapor are used for carrying out chlorination distillation on the reaction system B; and a gas-state germanium tetrachloride obtained through chlorinationdistillation is condensed. The process method is simple, short in flow path, low in cost and high in recovery rate, the germanium is extracted from the fluorine-containing germanium concentrate safely and environmentally friendly, and the recovery rate of the germanium directly extracted from the fluorine-containing germanium concentrate can reach 99.9%.

Description

technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to a method for distilling and extracting germanium from fluorine-containing germanium concentrate. Background technique [0002] Germanium is a rare metal element, mostly dispersed in lignite and lead-zinc ore. Most of the extraction methods of germanium are enrichment first and then refining. Germanium concentrates generally contain about 0.5-15% fluorine. Since most of the chlorination distillation reactors use glass-lined reactors and borosilicate glass condensers, during the distillation process of fluorine-containing germanium concentrates, the glass-lined and borosilicate glass condenser. The fluorine-containing germanium concentrate raw material is usually washed with tap water to reduce the fluorine in the germanium concentrate to less than 0.5% as much as possible, and then the obtained germanium concentrate is chlorinated and distilled. Need to use a large amoun...

AI Technical Summary

Problems solved by technology

Need to use a large amount of water when washing the germanium concentrate containing fluorine like this, and a large amount of germanium will be dissolved in water simultaneously, in order to reclaim germanium, the dissolved germanium needs to be precipitated, so many and complicated steps will increase the loss of germanium Large, resulting in low production efficiency and a significant increase in production costs