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A BATEMAN trailer-mounted, modular processing plant has been delivered
to Namibian Resources for use at their alluvial diamond-mining concession,
south of Luderitz.
The contract included the design, manufacturing, supply and delivery
of a 10 t/h dense-media separation (DMS) plant, an X-ray recovery
unit and a front end. The 10 t/h DMS plant is mounted on a 12 m trailer
for easy movement from site to site. The motor control centre (MCC)
is fixed on the main structure where a diesel driven generating set
will be mounted in front of the MCC. The plant was delivered to the
concession from Johannesburg by road and was designed so that it could
be easily disassembled for ease of transport and would comply with
road ordinance regulations. The entire plant, which weighs some 12,5
t, can be made ready within one day for relocation from one site to
another and can also be easily converted to a fixed installation on
a concrete base if the need arises.
Washed gravel (of size range +1,5 mm to -12 mm, equivalent to a ±24
carat diamond) from the modular pre-treatment plant is fed into the
DMS feed bin using a front-end loader. The gravel passes via a pan-feeder
onto a conveyor which feeds the DMS plant.
The DMS concentrates discharge into specially-designed stainless
steel bins. These bins have a three-hour capacity and, when full,
are lifted by chain hoists onto a truck for transport to the recovery
unit which is located 86 km from the mining site. At the recovery
plant, the concentrates are discharged onto a sizing screen for sizing
and a tube feeder feeds these fractions separately to the wet X-ray
recovery unit.
To obviate the need for separate transport arrangements, the DMS
has its own generator set which is mounted on a platform above the
rear wheels of the trailer, together with the MCC. The trailer has
a dolly wheel to enable it to be pulled by various means including
front-end loaders, graders or tractors.
Due to the aggressively corrosive climate on the West Coast all steelwork,
including the trailer, had to be painted to a special marine specification
to protect it from the extreme conditions such as salt-laden fog and
high winds.
The order was received in June 2004. The design, manufacturing and
supply of the plant were completed within three months. The complete
plant was manufactured, pre-erected and water tested at the works
in Gauteng. The erection of the plant, on site, and commissioning
were achieved in less than one week. BATEMAN engineers were on site
in Namibia both for the commissioning of the plant and training of
the operating staff.
For further information, please contact:
Andre Holtzhausen, Project Engineer, Modular Plants,
on +27-11-899-2111 or email
modular@batemanengineering.com
Robert Abate, General Manager, Modular Plants
on +27-11-899-2238 or email modular@batemanengineering.com.
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