for zinc, u heat the ore (zinc blende, or zinc sulphide) and it will become zinc oxide and sulphur dioxide. Then u reduce the zinc oxide with carbon monoxide. For aluminium, u have to add sodium hydroxide to the aluminium ore (bauxite) get rid of the iron III oxide impurities. The result is alumina or aluminium oxide. Dissolve this alumina in molten cryolite (to lower the temperature needed for the electrolysis) and then electrolyse it. U get aluminium. The anode is graphite. The cathode is steel i think.