Name of the Project
Mowana copper mine dense-media separation (DMS) plant.
Location
Botswana.
Client
Cradle Arc.
Project Description
An independent test report has confirmed the applicability of DMS at the Mowana copper mine, which could increase throughput to about 2.6-million tonnes a year.
Based on the outcome of this testwork, Cradle Arc intends to progress with a development plan for the upgrades to the Mowana processing plant. The project proposes to increase production at Mowana to about 22 000 t/y of copper in concentrate.
Testwork has demonstrated that DMS preconcentration can be deployed at Mowana for all low-oxide ores (those that contain less than 25% acid soluble copper).
Testwork has revealed that:
• a mass yield of 30% to 40% copper and recovery of more than 85% can be expected;
• mill feed grades of more than 2% can be expected, nearly double the current run-of-mine;
• an optimal crushing top size of 10 mm to 12 mm should be designed with respect to the upgrade project; and
• good rejection of gangue minerals is achieved, including carbon and silicon, with more than 75% being rejected.
Potential Job Creation
Not stated.
Net Present Value/Internal Rate of Return
The project has a net present value, at a 10% discount rate, of up to $245-million.
Value
Not stated.
Duration
Not stated.
Latest Developments
Initial DMS preparatory work is expected to be completed in the first quarter of 2018.
To complete the technical aspects of the DMS upgrade project, Wardell Armstrong International has been appointed to remodel the Mowana resource.
Key Contracts and Suppliers
Wardell Armstrong International (Mowana resource remodelling).
On Budget and on Time?
Too early to state.
Contact Details for Project Information
Cradle Arc, tel +44 20 7499 5881.