alumina is the main raw material for aluminum production. aluminum ingots in stacks. the conversion of alumina to aluminum is

design illustration aluminium vector isolated element physics scientific atomic lab oxide education technology icon science aluminum chemistry formula grey configuration force fundamental simple test symbol background nature clip art periodic table bond environment diagram study model molecule structure component power geology mineral text shape rock mineralogy natural valuable geological precious alumina main raw material for production ingots stacks conversion carried out via smelting method known hall-heroult process production stacks process