Mining and Metals
In 2011, Logitech Engineering commissioned the only DC Arc furnace in the world that is connected to Gas Turbines which
are not connected to the power grid. This is significant since the DC Arc requires 18MW of instantaneous power to
create the Arc, and also dumps this power instantly whenever the Arc is lost. We designed and commissioned a
large 11kV / 2.4MW load bank and a very large reactor and capacitor bank to create a system that worked reliably,
without tripping the Gas Turbines.
This 38 megawatt stand-alone gas-fired power station was built specifically for the Windimurra Vanadium Mine located near Mount Magnet in Western Australia.
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The photo above shows the very first Ferro-Vanadium metal pour from the Arc furnace.
The DC bus bars for the Arc Furnace were water-cooled due to the extremely high current flow.
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Vanadium Mining
To extract metals from an ore body, there are many steps involved:
The photo above shows a three-stage crushing and screening plant. The photo below shows the first crushed ore dumped to the
stockpile from the crushing and screening circuit.
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Magnetic Separation
Logitech Engineering joined forces with Atlantic Minerals,
PINC Group, and
EC&M to complete the structural, piping & electrical works for the Windimurra
Vanadium Mine near Mt Magnet. The crushing and beneficiation circuits (designed by others) proved to be undersized, which eventually led to the
temporary closure of the mine. The remaining systems worked very well and the first ever Ferro-Vanadium metal pour
was conducted in late 2011. The control system was Citect, with a mixture of GE, Siemens and Allen Bradley PLCs.
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Vanadium metal is most often used to manufacture high strength steel alloys (tools, springs and aircraft parts), but also has the potential to be used for Energy Storage applications. Vanadium batteries have very
high energy concentration and very low charge cycle memory, but are bulky when used as a redox flow battery. The cost of extracting the ore-body is high compared to Lithium, but the
batteries have the unique ability to be left completely discharged for long periods of time with no detrimental effect.
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