Name of the Project
Colluli potash project.

Location
Eritrea.

Client
The project is 100%-owned by the Colluli Mining Share Company (CMSC), a 50:50 joint venture between Danakali and the Eritrean National Mining Corporation.

Project Description
In a front-end engineering design (FEED) study completed in January 2018, the Colluli project was established as the most advanced, economically attractive and fundable sulphate of potash (SoP) greenfield development project globally.

The project has a Joint Ore Reserves Committee- (Jorc-) compliant mineral resource estimated at 1.29-billion tonnes grading at 11% potassium oxide (K2O) for 260-million tonnes of contained SoP equivalent.

The Jorc-compliant ore reserve is estimated at 1.1-billion tonnes grading at 10.5% K2O for 203-million tonnes of contained SoP equivalent.

A modular development approach for the Colluli project has shown a highly scalable, long-life project. The shallow mineralisation of the project makes the resources amenable to opencut mining.

The mine will comprise one openpit developing progressively from north-east to south-west. The pit will have a progressive working face that will provide access to each of the mineralised layers simultaneously. The orebody comprises sylvinite, carnallitite and kainite, which will be fed as orefeed into the processing plant and from which sylvite, carnallite and kainite will be extracted and mixed to produce SoP. The project proposes two modules. Module 1 is expected to produce 472 000 t/y of premium SoP. Module 2, starting production in Year 6 of the project, will increase total SoP production to 94 4000 t/y.

Mining will be conducted by mining contractors using conventional mechanised equipment, with no drill-and-blast required. Mined ore will be transported by truck to a run-of-mine pad adjacent to the processing plant.

The massive Colluli ore reserve has significant capacity to underpin further expansions and support decades of growth beyond modules 1 and 2.

Potential Job Creation
Not stated.

Net Present Value/Internal Rate of Return
The project has an after-tax net present value, at a 10% discount rate, of $902-million for modules 1 and 2, and an internal rate of return of 29.9%. Module 1 has a payback of 3.25 years.

Value
Module 1 will require an initial capital investment of $302-million. The incremental Module 2 development is expected to require an initial capital investment of $202-million.

Duration
Not stated.

Latest Developments
An independent report commissioned by the United Nations Development Programme has found that the Colluli potash project has the potential to significantly boost the Eritrean economy and advance that country’s sustainable development agenda.

“The report reinforces the uniqueness of Colluli. We appreciate the magnitude of the opportunity and the responsibility that comes with developing an asset of this significance with the potential to improve the lives of millions,” Danakali executive chairperson Seamus Cornelius has said.

Key Contracts and Suppliers
DRA Global (EPCM), Fluor (FEED engineering lead, metallurgy, process and nonprocess infrastructure, and capital and operating cost estimates); AMC Consultants (mine – geotechnical, mine design, mine contract tendering support, compilation of mining costs and competent persons report, and ore reserve update); Knight Piésold (evaporation ponds and tailings, infrastructure geotechnical investigations and hydrogeological investigation and modelling); Global Potash Solutions and Elemental Engineering (metallurgy and processing technical support); Ausenco (water abstraction and pipelines); Braemar ACM (port capacity, capability and handling fees, and engagement of shipping lines); and MBS Environmental (social and environment).

On Budget and on Time?
Not stated.

Contact Details for Project Information
Danakali, tel +61 8 6315 1444, fax +61 8 9467 9119 or email info@danakali.com.