Boschmanskrans gets a Bradford Breaker
BATEMAN has supplied a Bradford Breaker to
Douglas Colliery Services (Ltd) for its Boschmanskrans pillar project,
which is situated near Witbank in Mpumalanga. The breaker is used in
a secondary-crushing application and, depending on stone content, processes
between 1 500 to 2 100 t/h of a feed of run-of-mine (ROM) coal pre-crushed
by a giant jaw crusher. The processed coal is then conveyed to a stockpile
for further processing and distribution.
The large feed and discard openings allow the passage
of large lumps of material without the risk of blockage,” says
Dan Lategan, BATEMAN Product Manager. “The specific benefits of
the Bradford Breaker include the ability to simultaneously size and
clean raw coal. Fines generation is minimised as the coal is fractured
along natural cleavages. The internal lifters can easily be arranged
to accelerate or retard the material-flow rate through the machine and,
as the machine is designed to contain dust, effective extraction and
treatment of dust-laden air are possible.”
Overlapping and double-bolted screen plates ensure
high cylinder strength, while a special hole design can be used where
clay is present to prevent the screen plate perforations from plugging.
The machine is easy to maintain and repair, as it is driven from one
end only by a simple drive assembly comprising a squirrel-cage motor,
fluid coupling, gearbox and chain drive.
Douglas Colliery has both opencast and underground
sections, and is owned by joint venture partners Ingwe Coal Corporation
and Glencore. The colliery produces 9,5M t of coal per annum, which
is supplied to the export, domestic and local power-station markets.
The surface mine has recently been extended to mine the top seam and
shallow pillar reserves remaining from previously worked underground
areas.
BATEMAN supplied, installed and commissioned the 4,2m
x 8,5m Bradford Breaker, which was manufactured in South Africa under
licence to Pennsylvania Crusher Corporation, USA. It consists of a large
rotating cylinder powered by a 185 kW electric motor through a reducer
and chain drive. Coal is lifted and dropped in the cylinder, shattering
on impact. Product-sized coal passes through perforations in the cylinder
shell, while reject material – such as stone and debris –
is discarded separately. While Bradford Breakers are commonly used in
applications involving raw coal, they can also be used to break and
separate other materials.
BATEMAN has a thorough after-sales support strategy
in place to service Bradford Breakers, including machine spares and
a dedicated field-service engineer in the Witbank region.
For more details, please contact
Dan Lategan, Product Manager, Bateman Engineered Technologies
on
+27-11-201-2300 or email engtech@batemanengineering.com.
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