Aluminium production
Videonummer 11937733
| Aluminium smelting process. This is the production of aluminium metal from aluminium ore (bauxite). The first stage (left) is the Bayer Process to produce alumina (aluminium oxide) from the raw bauxite. The bauxite is crushed (top); chemically digested in sodium hydroxide; alumina hydrate is precipitated (brown) and then heated to form the pure alumina (yellow). The conveyor belt deposits the alumina in molten cryolite (sodium aluminium fluoride), which reduces the melting point to 1000 degrees Celsius. Electrolysis (Hall-Heroult Process) is used to obtain molten aluminium metal. | |
| Lizenzart: | Lizenzpflichtig |
| Credit: | Science Photo Library |
| Modell-Rechte: | nicht erforderlich |
| Länge: | 60 Sekunden |
| Seitenverhältnis: | 16:9 |
| Restrictions: | - |
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