|
Application and Operating Principle:
Metal
extractors are integrated in various vacuum conveyors.
They can even be used as
portable equipment to feed multiple
devices.
The metal
extractor consists of the following assemblies:
 |
metal
detector |
|
electronics |
|
cyclone |
|
sorting gate |
In
normal operation, the material flows through the ring
sensor, cyclone and
sorting gate to the processing machine. Existing
metallic particles are
detected by the metal detector and separated
through the sorting gate.
During
separation, the pressure in the further conveying
system is maintained.
If
metallic particles are detected in the flow, the sorting
gate changes over very
quickly and separates the particle through
the metal discharge.
Subsequently, the gate returns to the
'OK position'.
The patented
function principle makes influences like
|
conveying-speed variations |
|
discontinuous conveyance |
|
varying raw material density in the storage bin
|
|
material constitution |
|
conveying capacity |
completely insignificant, and the separation of
metal-contaminated
material from good one is performed reliably and
without readjustment.
Depending on the conveying speed,
the material flows downward in
a distinct helicoidally rotational
motion. At higher speed, the
spiral trajectory is longer than at
lower speed. That is why
despite the higher speed, a contained
metallic particle is not
passed too early into the sorting
gate. So it is guaranteed that
the sorting gate has enough time
to open after metal was
detected.
The
separation time is adjusted by the manufacturer and
can – if required – be
modified by the user subsequently. |
