IM 2018 February 18 | Page 55

CONVEYORS
The work scope also includes water and air
piping for the required dust suppression
equipment, fire protection along all of the
underground conveyors and electrical
infrastructure to control and power the equipment.
RULMECA Germany has supplied rollers and
garlands for the equipment of the new conveyor
belt systems of the Mae Moh overburden project
No. 8 in northern Thailand. Approximately 18 km
of belt system in widths of 2,600 mm, 2,200 mm
and 1,800 mm are equipped with RULMECA
technology for the upper and lower belt as well
as the transfer stations. Sahakol Equipment
Public Co is the contracting partner for the
procurement of rollers and garlands. Sahakol
operates conveyor belt systems for EGAT (Energy
Generating Authority of Thailand). The company
says “the long-term relationships of RULMECA to
the owner of the open-pit mine as well as to the
service provider for the overburden excavation
and the associated very good experiences with
RULMECA products made it easy for Sahakol to
make the decision. In the very well-maintained
belt systems, ten-year and longer service life is
common.”
Other considerations were low energy
consumption and low noise emission
requirements for bearing rollers, as were long life
and associated material and cost savings.
Sahakol decided to use rollers with a diameter of
194 mm. Compared to the diameter of 159 mm
used in older belt systems, there is a
considerable advantage in terms of energy
consumption due to the considerably smaller
rolling resistance. With a belt width of 2,000 mm
and a belt length of 1,887 m, a reduction in the
rolling resistance of up to 300 kW is achieved.
Taking into account the fact that the energy is
generated in a coal-fired power plant, this means
a CO 2 saving of about 2,400 t/y. This data
convinced the owner of the open pit and the
operator of the conveyor systems. Peripheral
equipment such as excavators, crushing plants
or spreaders use RULMECA rollers of the same
type at the operator's request, which
significantly improves spare parts stock and
availability.
Continuous haulage
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