Method for extracting germanium by acid burning

The invention discloses a method for extracting germanium by acid burning, which comprises the steps of acid burning and post-treatment, and specifically comprises the following steps: adding acid into coal ash for size mixing to obtain a material a; heating the material a to 350-800 DEG C, and keeping the temperature for 10 minutes to 10 hours to obtain an acid melt b; grinding the acid melt b until the particle size of 200 meshes is greater than 60% to obtain a material c; distilling the material c to obtain residual slurry d and a distillation fraction e; hydrolyzing the distilled fraction e with a diluted hydrochloric acid solution, and then drying to obtain GeO2; according to the method, the trend of the metal element Ge is mainly controlled, effective extraction of Ge is achieved, the technological process is simple and easy to operate, the direct recovery rate of Ge is high, and economic benefits are remarkable. 本发明公开了一种酸烧提取锗的方法，包括酸烧和后处理步骤，具体包括：将煤灰中加入酸调浆得到物料a；将物料a升温至350℃~800℃保温10min~10h得到酸熔料b；将酸熔料b磨至粒度