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Largest Trommel Built By Multotec Joins Other Group Products At Mandena, Madagascar
The massive trommel is 15 metres in length and weighs just under 50t.
The largest self-driven trommel ever
built by Multotec has been successfully commissioned
at the QMM’s Mandena Mine in Madagascar where it is
installed in the mine’s heavy minerals process
plant.
Anthony Yell, product manager screening at Multotec
Manufacturing, says the trommel has the same
diameter as the one which was manufactured for
Hillendale more than ten years ago, but it is far
longer. “This massive trommel has a 3.5 metre
diameter, is 15 metres in length and weighs just
under 50 t,” he says. The Multotec self driven
trommel will process 3200 tph of dry solids or 5943
m3/h of heavy minerals slurry. “This is almost
double that of the Hillendale trommel,” Yell says.
Rutile and Zircon will be the primary minerals
recovered by this process plant, and Yell says that
one of the uses is in the manufacture of paint. |
Spaltoflex hand cast polyurethane panels,
each 1086 mm x 1000 mm, have been fitted to the trommel.
These large panels, with slotted apertures were selected as
they provide good life and are easier to replace during
maintenance. The trommel also has steel rubber-lined bolt-on
scrolls to convey the feed through the trommel in a uniform
manner.
The trommel is equipped with a peripheral discharge
arrangement and is driven by a Hägglunds variable speed
drive system. “This hydraulic drive system facilitates
variable speed allowing optimisation of the screening
process,” Yell says.
Significantly, a number of other Multotec products have also
been commissioned on the wet plant. Two static screens
fitted with modular polyurethane panels (305 mm by 305 mm)
were supplied, and the feed boxes on these screens are
ceramic lined with engineered high alumina ceramic tiles to
optimise wear life.
Vezin wet sampling systems have been installed on the
rougher, cleaner and scavenger spiral plants, allowing a
representative increment sample to be taken.
The dry plant has six wet vezin samplers, two telescopic
samplers and six belt end samplers, all of which allow for
accurate samplers in their individual applications.
Eight stacker dewatering cyclones, each with a 420 mm
diameter, and six cyclones being used for dense medium
separation. The latter are rubber-lined cyclones. In
addition, two larger stacker cyclones, each with a 1200 mm
diameter and ceramic lined, are installed in the tailings
circuit. All the cyclones were supplied by Multotec.
Multotec modular polyurethane screen panels are installed on
all four vibrating screens at the plant. The proven Saddle
Top system has been used to secure these panels and will
minimise maintenance downtime on the screens.
The plant is situated in a remote part of Madagascar on the
coast where there is no modern infrastructure, and as part
of the project a new harbour and power station was built to
service the plant and the local community. All the products
were shipped to this new harbour.
“It is not unusual for Multotec products to be spread across
a plant such as this,” Yell says. “The group has a
comprehensive range of minerals processing plant and
equipment and is able to provide an appropriate cost
effective solution.”
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