The invention discloses a process for extracting
tin from silver separation residues. The process comprises the steps that 1, a proper amount of the silver residues are picked and subjected to crushing treatment, the silver residues obtained after crushing are mixed with a flocculating agent according to the
mass ratio of 1: 10 and ground into thick liquid, and the materials are mixed uniformly, so that a
mixed solution of the silver residues and water is obtained; 2, the
mixed solution of the silver residues and the water is poured into a holding furnace, the temperature is raised to 560-850DEG C, stirring is conducted for 20 minutes, and after stirring is completed, the materials are left standing still for 3-6 hours; and 3, filter treatment is conducted on mixed liquor obtained after stirring is completed in step 2 four times through a high-pressure filter, wherein
filtration of the first time is conducted at the speed of 40 m / h. According to the process for extracting the
tin fromthe silver separation residues,
filtration is conducted multiple times, and it can be guaranteed that impurities in the silver residues are filtered out completely; the purity of an obtained productis improved; meanwhile, under the
atmosphere of
carbon dioxide, the impurities in the silver residues can be separated out, and the purity of the obtained product is further improved; in addition, under the
atmosphere of
nitrogen gas, a
chemical reaction can take place stably; and the preparation process is simple and low in cost, and the better application prospect is achieved.