| abstract |
A process for recovering metal from a process material comprising the metal and a component that is more volatile than the metal, which process comprises:n transporting the process material in a retort provided in a furnace, the retort being operated under vacuum and at a temperature sufficient to cause sublimation of the component from the process material thereby producing purified metal; depositing the component that has been sublimed on a cool surface; removing purified metal from the retort; and removing deposited component from the cool surface. |