The electrolytic process for extracting metal such as Cu, Ag and Bi from solution features that high-density cloth made of Novodur is used as diaphragm in primary cell to isolate metallic solution to be extracted and corrosion liquor, and dual-corrosion-electrode structure is designed. Connecting corrosion electrode with deposition one makes electrolysis automatically conduct in electrolyzer. Its advantages include high ion exchange amount, current density and corrosion resistance, low cost and high quality of product. |