HomeGoldAureus Mining resumes crushing and processing operations at New Liberty

Aureus Mining resumes crushing and processing operations at New Liberty

Liberia – TSX and AIM listed West African gold producer Aureus Mining resumed its gold producing operations at the New Liberty gold mine in Liberia following the successful repair of the secondary crusher.

Following the successful installation of a temporary 200 tph mobile crusher at New Liberty, which was sources in country, ore crushing operations recommenced on 28 October 2015 to build up a stockpile of crushed ore before processing operations restarted on 30 October 2015.

The crushing circuit at Aureus Mining's New Liberty gold mine in Liberia, West Africa
The crushing circuit at Aureus Mining’s New Liberty gold mine in Liberia, West Africa

The mobile crusher is sufficient to supply the New Liberty ball mill, which runs at a designed feed rate of 146 t of run of mine (RoM) ore per hour.

Aureus says that the mobile crusher will be retained on site for a period of six months to provide additional operational flexibility during the final testing and commissioning phase of the plant, and also to provide additional crushed rock material for use on haul roads and other associated infrastructure.

Specialists from DRA, the EPCM contractor and technicians from the OEM of the secondary crusher successfully completed repairs to remediate the mechanical failure within the secondary crusher.

These repairs were completed on 29 October 2015, following which time the secondary crusher has been tested extensively to ensure all parameters are operating correctly before being recommissioned and ramped back up to its full capacity.

Following the resumption of crushing activities, a stockpile of 6 000 t of crushed fine ore allowed for the restart of milling and CIL processing operations. Milling operations commenced at design capacity of 146t/hr on 30 October.

During the 19 day temporary shutdown in processing operations, mining operations continued to progress, leaving ROM stockpiles totalling 55 283 t at 3.16 g/t and oxide stockpiles of 105 203 t at 2.04 g/t.

Additionally during this period Aureus took the opportunity to undertake further preventative maintenance works around the plant site.

Following the successful restart of processing operations, the focus of the company returns to working towards declaring commercial production at the New Liberty gold mine.

Commercial production will be declared on the first day of the calendar month following the mill having operated at an average of 60% or more of the designed production capacity, calculated over a 60 day period. Management now expects to achieve commercial production in early January 2016.

Aureus Mining president and CEO David Reading, is pleased that gold processing operations have recommenced at the New Liberty gold mine. “We are now looking forward to declaring commercial production in January 2016.

“The quick remediation of the secondary crusher failure is testament to the hard work of our employees and the specialist engineers and technicians from DRA and the OEM, who have worked tirelessly to restart production as quickly as possible,” says Reading.

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Chantelle Kotze
Chantelle Kotze is a Johannesburg-based media professional. She is a contributor at Mining Review Africa (Clarion Events - Africa) and has created content for the media brand over the past 6 years.