Extractive metallurgy
Metallurgy of selenium and tellurium

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 SO₂ and Cl₂ , and does not produce arsenic compounds [27]. However, it has not progressed beyond the pilot stage.

In the case of mattes resulting from the smelting of mixed nickel-copper...