| What a long way from the 4000 ampere pot with its rotating cathode at the Froges plant in 1889 up to the G-line pots of 300 000 amperes. |
| 1886 |
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April 23rd, Paul Héroult applied for a patent for the industrial electrolysis of aluminium.
Paul Héroult registers the electrolysis process.
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Electrolysis (Froges, 1889)
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| 1893 |
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Paul Héroult lays out the first aluminum production site in La Praz |
| 1907 |
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Saint Jean de Maurienne plant start up |
| 1910 |
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6 aluminum production units in the Maurienne valley |
| 1979 |
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F potline start up |
| 1982 |
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A potline shut down |
| 1986 |
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G potline, 7th generation of reduction cells (280 kA 305 kA in 2001) |
| 1999 |
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M98 rod mill |
| 2003 |
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G potline intensity increase at 313 333 A and 8 cells at 352 000 A |
| 2004 |
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New cell regulation system (Alpsys) and new wire rod machine (P02) |
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These innovations make Saint Jean de Maurienne, with a workforce nearly 700 strong,
one of the most modern plants in its field today. |