electrometallurgy
/ɪˌlɛktrəʊmɪˈtalədʒi/ /ɪˌlɛktrəʊˈmɛtələːdʒi/Metallurgy
noun
The use of an electrical process in the extraction or working of metals; specifically the use of electrolysis in their extraction or purification.
Origin
Mid 19th century. From electro- + metallurgy.