| 摘要 |
In the circulation of electrolyte in a vertical-cylinder-type electrolyzer having a three-dimensional filling cathode made of active carbon granules and a fixed granular catalyst layer, the leaching and precipitation of a precious metal occur in the same phase. Since electrochemical leaching and sorption take place simultaneously, electric energy may be saved, and the use of equipment may be facilitated. An apparatus for extracting a precious metal from an inorganic granular waste catalyst of the present invention includes a vertical electrolyzer, a conduit line, an electrolyte circulation pump, a device automatically maintaining the acidity required for the circulation of electrolyte, a filter filtering out active carbon particles from the electrolyte, a control valve, and a stop valve. The electrolyzer includes a heat exchanger heating the circulating electrolyte, an infusible anode, and a three-dimensional filling cathode made of active carbon granules. |
