2013 Processing & Mining Performance
nordgold
Processing summary
A.
To improve the particles size of the ore to match the increase in production from 140 TPH to 210
TPH a regrind mill has been installed and started in August 2012.
An improvement of 15 % on the grind size has been achieved.
B.
In 2013 we encountered high graphite and pyrite levels in the ore creating a reduction in recovery.
Modifications were done to reduce the preg-robbing effect of the graphite.
The slow gold dissolving process is mainly due to high pyrite content. Additives were added to the
slurry to improve the reaction kinetic.
C.
D.
To increase the residence time, two new CIL tanks have been installed and started in August 2012.
In 2013, the average residence time was close to 23 hours as per the feasibility steady.
The tailing dam height increases in 2013 to support production for the next 2,5 years. The bottom
and the berms of the tailing dam are covered by a 1.0 mm HDPE liners to eliminate risk of water
table contamination.
IE.
ヨ
Additional improvement projects and equipment will see 2014 throughputs to close to 2.0 Mtpa by
the end of the year.
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