One of 2 technologies is used to perform it, either the Soderberg Method, which uses liquid pitch to continuously renew the required anode, or the Pre­Bake Method, which uses a more expensive but higher quality anode that does not degenerate nearly as fast as a Soderberg Anode.
One of 2 technologies is used to perform it, either the Soderberg Method, which uses liquid pitch to continuously renew the required anode, or the Pre­Bake Method, which uses a more expensive but higher quality anode that does not degenerate nearly as fast as a Soderberg Anode. Monatomic carbon is added to a bath of liquid cryolite, Al 2 O 3 ore, and silver fluoride. As a result, carbon dioxide gas is released, the cryolite is unchanged, and pure metal forms a precipitate. Simultaneously but independently discovered by eponymous American and French industrialists was, for ten points, what process that turns aluminia ore into pure aluminum.
One of 2 technologies is used to perform it, either the Soderberg Method, which uses liquid pitch to continuously renew the required anode, or the Pre­Bake Method, which uses a more expensive but higher quality anode that does not degenerate nearly as fast as a Soderberg Anode.
Hall­Héroult (HAHL­he­ROO) Process