| 摘要 |
<p>Raw lead to be refined is leached in a leach apparatus with a leach solution containing fluoro compounds, in particular ferric fluorotitanate. During the leaching step, lead is dissolved, with ferric fluoro compounds being reduced to ferrous fluoro compounds. The leaching solution resulting from the leaching step is sent to the cathodic compartment of a diaphragm cell in which lead is deposited on a cathode, in compact, highly pure form. The solution that is depleted of lead is sent to the anodic compartment in which a suitable anode oxidizes the ferrous fluoro compound to ferric fluoro compounds that can be recycled to the leaching step. A process for electrorefining of lead from a lead source, e.g. a lead bullion, comprises electrolyzing an anode (lead bullion) or an electrolyte containing a fluorotitanate compound and depositing refined lead on a cathode.</p> |
