Extraction Of Metals: Metallurgy | Notes, Videos, QA and ...
The extraction of crude metals from the concentrated ore involves the following steps: ... ( Limonite ) → (calcination) Fe ... zine, silver, lead, gold, aluminium, etc. In this method, the hode is made of pure metal and impure metal is used as anode as in figure below : Electricity Refining Here, copper is refined by this process as Cu→ Cu +2 + 2e( at anode) Cu +2 + 2e→ Cu ( at ...