MINING ENERGY_proof 22/08/2016 19:45 Page 12
MINING ENERGY
Vionx’s preventative maintenance program
(PM), provided under our long-term service
agreement, is based on constant, real-time
systems monitoring and fault isolation.
Caterpillar has invested in Fluidic Energy,
which designs, manufactures and markets
proprietary energy storage solutions. It says it “is
the first and only company to commercialise and
deliver rechargeable metal-air battery technology
in high production volumes for commercial loadshifting applications. Metal-air battery
technology has long been considered the lowest
cost way to store an electron. Fluidic is also the
only company to develop integrated controls
intelligence at the cell level taking the system's
sophistication and ability to reduce energy costs
to a whole new level. The net result is a technology
suite that delivers the lowest total energy cost
solution and optimal performance metrics for many
grid scale and peak shaving markets.”
“Entering into global commercialisation in
mid-2011 with over 35,000 batteries in operation
by mid-2014, the technology is proven to increase
reliability and outperform in terms of cost, longevity
and functionality. In addition to proven capabilities
of managing both long and short partial cycles at
the lowest cost, other key fundamental advantages
include repeated ultra-long discharge time
capability, higher energy density, environmentally
friendliness, no theft value and increased safety (i.e.
no chance of thermal runaway).” IM
Marthinusen & Coutts recently repaired two large mill motors for leading uranium producer, Rössing
Uranium; celebrating 40 years of production this year. Two brush mill motors were inspected on site.
It was found that the starting cage winding on one of the motors had moved and rubbed against the
stator winding, while an insulation test conducted on the second motor indicated that the stator
winding was down to earth. This necessitated having both motors repaired at Marthinusen & Coutts’
facility in Johannesburg. As no spare motor would be available to the mine in the event of a further
breakdown while the two spare motors were being attended to, the first of the two brush motors to
be repaired was treated with the greatest urgency to ensure that it was returned as quickly as
possible. “The repairs were completed within three months and the motor was returned to the
mine,” Craig Megannon, Marthinusen & Coutts’ General Manager, explains. The repairs consisted of
rewinding the stators incorporating use of a resin-rich winding system, overhaul of the rotors and
complete replacement of the rotors’ electronic diode and synchronising hub. This picture shows
Alpheus Mtshali, Marthinusen & Coutts, with one of the 1,586 kW, 187.5 rpm, 3,300 V, 278 A stators
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