While solid cryolite is denser than solid aluminium at room temperature, liquid aluminium is denser than molten cryolite at temperatures around . The aluminium sinks to the bottom of the electrolytic cell, where it is periodically collected. The liquid aluminium is removed from the cell via a siphon every 1 to 3 days in order to avoid having to use extremely high temperature valves and pumps. Alumina is added to the cells as the aluminum is removed. Collected aluminium from different cells in a factory is finally melted together to ensure uniform product and made into metal sheets. The electrolytic mixture is sprinkled with coke to prevent the anode's oxidation by the oxygen involved.
While solid cryolite is denser than solid aluminium at room temperature liquid aluminium is denser than. molten cryolite at temperatures around . The aluminium sinks to the bottom of the electrolytic cell, where it is periodically collected The liquid aluminium is removed from the cell. via a siphon every 1 to 3 days in order to avoid having to use extremely high temperature valves and pumps Alumina is added to the cells as the aluminum is removed. Collected aluminium from different cells in a factory is, finally melted together to ensure uniform product and made into metal sheets. The electrolytic mixture is sprinkled with coke to prevent the anode's oxidation by the oxygen involved.