Decommissioning and disposal
11.1 Decommissioning
Synchronous/induction motors 1PH813
82 Operating Instructions, 04/2009, 610.48000.22
Copper recovery
Some components (e.g. stator) contain a considerable amount of copper. This copper can
be recovered from the electrical insulation in a heat treatment process, which involves
gasifying the organic binding materials. To ensure that the vapors burn properly, the oven
must be equipped with a suitable afterburner. The following conditions are recommended for
heat-treating and afterburning to minimize process emissions:
Table 11- 1 Heat treating
Temperature 380 … 420 °C (716 … 788 °F)
Duration Once 90% of the target temperature has been reached, the
object must be kept at that temperature for at least five hours.
Table 11- 2 Afterburning of the binding material vapors
Temperature 850 … 920 °C (1562 … 1688 °F)
Flow velocity The binding material vapors must remain in the combustion
chamber for at least 3 seconds.
NOTICE
Emissions
The emissions mainly constitute O
2
-, CO-, CO
2
-, NO
x
-, C
x
H
y
gases and microscopic
particles. As the operator, you are responsible for ensuring that the heat treatment process
complies with local regulations.
Anti-corrosion agent
Anti-corrosion agents that cover the surface of the motor can be removed by means of a
gasoline-based cleaning agent and a rag. Dispose of the rag in accordance with local
regulations.
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