PROCESS DESIGN
per hour gravity plant from its Nickol River
operations near Karratha to the Radio Hill site,
where it will be installed in readiness to process
sizeable bulk samples of gold bearing
conglomerates, in conjunction with a multi-stage
contract crushing plant, when required.
Outotec on ore sorting
For Radio Hill, Gekko Systems Pty Ltd have
been asked to provide a comprehensive two
stage gravity gold plant with a nominal
capacity of 70-100 t per hour
from the Radio Hill decline, and has been well
maintained since it was put on care and
maintenance nine years ago.
It consists of a two-stage crushing plant,
primary grinding mills, two discrete multi-stage
flotation circuits, separate concentrate filtration
plants and a tailings thickener. A plant laboratory
and fully equipped workshops have been
maintained on-site. The Radio Hill complex offers
several key advantages for getting Artemis into
gold and base metals production earlier and
more cost effectively than would otherwise be
possible, as;
n The Radio Hill site is fully permitted for
operations;
n There are permitted tailings storage facilities
on site;
n Existing infrastructure for mains power supply
has been well maintained;
n Strong water supply from an existing bore
field with proved capacity and quality;
n Radio Hill is only 35 km from Karratha so
there is no need to establish expensive
camps and associated infrastructure for the
work force
Artemis has also started relocating its 100 t
Sensor-based ore particle sorting offers a
powerful method for pre-concentration or waste
rejection early in the comminution process. The
technology analyses each and every rock particle
on-line for unique physical and chemical
properties and separates the particles by high
pressure air jets. This maximises recovery or
upgrade and is suitable for various minerals and
applications. Successful implementation relies on
ore heterogeneity, differential sensor response
and suitable feed preparation. Sensor-based
sorting has been around since the 1970s. In the
early days mainly radiometric and photometric
sensors were used to distinguish characteristics
of materials. As it is common with new
technology it was very expensive, and computing
performance was highly limited making it often
not economic viable. The information revolution
at the turn of the millennium boosted computing
power, making it cheap and available. Today data
reconciliation, validation and analysing does not
limit the sorting process any more. The focus on
26 – 28 June | Hillhead Quarry | Buxton | Derbyshire | UK
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