8. Extractive metallurgy

In the case of anode slimes from copper electrorefining, there are numerous processes for both selective extraction and purification of selenium and tellurium. These processes classically combine the dry route (pyrometallurgy) and the wet route (hydrometallurgy) and are applied on an industrial scale [20][21][22] . However, the fully wet route is a more attractive method, as it avoids the production of polluting gases, such as SO ₂ and Cl ₂ , and does not produce arsenic compounds [27] . However,...