How is molten aluminum removed from a reduction cell?

In the Hall-Héroult process, molten aluminum is removed from the reduction cell by being siphoned off.1

Once the metal is siphoned from the cells, it is transferred into large crucibles. From these crucibles, the primary aluminum—which is approximately 99.8 percent pure—can be processed in several ways:1

• It may be poured directly into molds to create foundry ingot.1
• It may be moved to holding furnaces for further refining.1
• It may be alloyed with other metals to form fabricating ingot.1