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MEI Online: Plant Operation News: North America: September 16th 2004


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:: Feasibility Study Completed for Doris North at Miramar's Hope Bay

BATEMAN has been contracted by Miramar Mining Corporation to investigate the potential to install a SAG (semi-autogenous grinding) mill to reduce capital and operating costs on the proposed initial development of the high-grade Doris North gold deposit at the Hope Bay project in Nunavut, Canada.

This investigation is an extension of a feasibility study conducted by BATEMAN with other consultants, which was completed in 2003, with the objective of facilitating the rapid development of low-cost, high-return and low-risk gold production on the Hope Bay belt. Based on the results of this study, production on the Doris North deposit is targeted to commence in early 2006, subject to the granting of the required permits.

A modular concept was selected for the study as no foundations would be required for the mill, which could be set on bedrock and compacted fill and covered with a sprung structure similar to those used at a number of other arctic locations. The ore will undergo conventional crushing and grinding with an integrated, gravity, gold-recovery circuit followed by flotation and cyanidation of flotation concentrates, with gold dor produced on site.

Pre-concentrating the gold into a small volume of concentrate that can be intensively treated is another key feature of the BATEMAN modular gold plants. This feature leads to a more compact operation; minimised reagent exposure, containment and elimination; reduced leach times and circuits; and possible direct gold recovery via electrowinning, thus avoiding carbon adsorption, stripping and regeneration.




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