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Trevali Mining Corporation (TSX:TV) announced a mine and mill commissioning update for its Caribou Zinc Mine in the Bathurst Mining Camp of northern New Brunswick.
Trevali Mining Corporation (TSX:TV) announced a mine and mill commissioning update for its Caribou Zinc Mine in the Bathurst Mining Camp of northern New Brunswick.
As quoted in the press release:
A detailed description and discussion is provided below and progress highlights are as follows:
Caribou Zinc Circuit Summary
During May-2016 and June-2016 Month-to-Date (“MTD”) the Caribou metallurgical team made very significant improvements on increasing zinc recoveries towards entitlement ranges as outlined in the Caribou PEA report (see Technical Report on Preliminary Economic Assessment for the Caribou Massive Sulphide Zinc-Lead-Silver Project, Bathurst, New Brunswick, Canada prepared by SRK Consulting (Canada) Inc., on the Company’s website or on SEDAR).
The Company continues to focus on highlighted areas for metallurgical improvement with modifications to be implemented during ongoing scheduled maintenance periods (please see News Release TV-NR-16-11, May 11, 2016 for details). Modifications completed during May, and which are ongoing include:
- Primary grind: Continues to consistently trend lower year-to-date at increasingly higher throughputs. In January the primary grind averaged 41 um versus 36 um in May. Work is ongoing and the mill team is currently optimizing the ball charge (smaller media) in Ball Mill #1.
- Zinc recoveries continue to trend higher as the metallurgical team continues to improve the plant process water quality (essentially manage the calcium content).
- IsaMill redundancy work is complete.
Ongoing scheduled optimization initiatives include:
- Increase in the number of sample stations for the on-stream sample analyzer.
- SAG Mill modifications, primarily installation of newly designed lifters and shell liners will commence in June and continue during scheduled shut downs throughout the summer period.
- Cyclone control optimization to further increase circuit stability – June.
- Pumping infrastructure including capacity and electrical upgrades are in progress. Standby pumps are also being rebuilt. The upgrades are designed to result in improved performance when handling the finely ground process feed.
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