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Mechanical Technology — May 2016
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Materials handling and minerals processing
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T
he recent supply of a complete
resonance screen with an ad-
ditional screen box to an Aus-
tralian iron ore mine underpins
MBE Minerals SA’s drive to participate
in global markets. The supply of these
screens is the continuation of the screen
replacement programme of 20 such
machines for this major Australian iron
ore producer.
“Significantly, the original screens
were manufactured in South Africa by
MBE Minerals in 1997 and have been
operating successfully in a fashion that is
typical of their reputation for extended life
cycles in arduous hard rock applications.
We can reference a number of enduring
heavy duty vibrating screen installations
in the iron ore sector, including ones in
the South African Northern Cape that
have been in operation for more than
40 years,” says Johannes Kottmann,
managing director of MBE Minerals SA.
The 2.4 by 4.5 m screen employs
the principle of resonance and dynamic
vibration adsorption for its screening
action. “A number of design elements
have been incorporated to enhance per-
formance, including the operation of the
screen box at near resonance frequency.
This allows the actuating device to re-
place only energy lost to the oscillating
system by mechanical resistance and
material transport,” Kottmann explains.
A counter-oscillating frame of pre-
determined mass ratio to the screen pro-
vides vibration absorption, thus minimis-
ing the transfer of dynamic loads into the
supporting plant structure. The addition
of support, working and coupling springs
allows energy exchange and guides the
counter-oscillating masses.
MBE Minerals SA manufactures a
wide variety of vibrating screens, all de-
signed with sound mechanical features
including vibration damping, side plates,
cross members and the appropriate feed
and discharge chutes. This includes
screens of linear and circular motion
design, both in single and double deck
The recent supply of a complete resonance screen to an Australian iron ore mine underpins MBE Minerals
SA’s drive to participate in global markets.
The resonance screen manufactured by MBE Minerals SA is one of 20 such machines being supplied as
replacement screens to an Australian iron ore mine.
Extending its success in Australia, which began with the supply of vibrating screens back in 1997,
MBE Minerals South Africa has recently manufactured and supplied a complete resonance screen with
and additional screen box to an Australian iron ore mine.
Resonance screen supply
underlines
successful global penetration
configuration from 0.6 to 3.6 m in width
and up to 8.5 m in length.
“Our screens are manufactured to
provide increased throughput, while at
the same time reducing both downtime
and maintenance costs. Leveraging an
extensive footprint of products for siz-
ing, scalping, dewatering and media
recovery, we are able to customise each
screen to the specific requirements of
the customer’s application,” Kottmann
concludes.
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