Photo by: Triton Minerals
Name of the Project
Ancuabe graphite project.
Location
Cabo Delgado province, Mozambique.
Project Owner/s
Graphite developer Triton Minerals. Shandong Tianye Mining (STM) has a 19.4% shareholding in Triton.
Project Description
Ancuabe has a maiden Joint Ore Reserves Committee-compliant ore reserve of 24.9-million tonnes at 6.2% total graphitic carbon based on the T12 and T16 mineral deposits.
A definitive feasibility study (DFS) on the deposits has confirmed the high quality, long life and high margin of the graphite project.
The DFS is based on the production of about 60 000 t/y of graphite concentrate over 27 years. The mine plan is based on the ore reserve, and less than 5% of the production is sourced from inferred mineral resources, which are mined to access the ore reserve.
It is planned that conventional drill-and-blast, load-and-haul, openpit mining will be used to extract the mineralised material. Run-of-mine (RoM) feed will be defined by grade-control procedures in the pit, and delivered by truck to the RoM pad located centrally between the T12 and T16 deposits. Waste will need to be classified according to its acid-forming potential and be dumped in managed waste dumps adjacent to the openpits. It is planned that mining will be carried out by an experienced earthmoving contractor.
Ancuabe’s process plant will have a throughput of between 900 000 t/y and 1.1-million tonnes a year to produce an estimated 60 000 t/y graphite concentrate. The proposed process plant facilities include:
• an RoM pad;
• a tertiary crushing circuit;
• a rod mill feed bin and grinding circuit;
• rougher flotation;
• three stages of attritioning and five stages of cleaner flotation;
• concentrate filtration;
• concentrate drying, classification and bagging of three products;
• tailings thickening and storage; and
• reagents.
Potential Job Creation
Not stated.
Net Present Value/Internal Rate of Return
The project has an unleveraged pretax net present value, at a 10% discount rate, of $298-million and an internal rate of return of 36.8%, with a near-term payback of 3.8 years.
Capital Expenditure
Preproduction capital costs are estimated at $99.4-million, including contingency.
Planned Start /End Date
Production is planned to start in the second half of 2019, subject to financing and board approvals. First production is expected in late 2020.
Latest Developments
Triton Minerals has identified $7-million in alternative funding options for the commercial pilot plant (CPP) at the Ancuabe project.
The alternative funding options will result in a 13% to 22% reduction in initial funding requirements for the CPP.
The options under review include the potential use of contractors, service providers and equipment leasing for crushing, as well as village infrastructure, mobile equipment, light vehicles and power supply.
The alternative funding options are aimed at a 250 000 t/y plant capacity producing 15 000 t/y to 17 000 t/y of graphite concentrate as proposed in the CPP desktop study.
Triton executive director Andrew Frazer has said that the alternative options will positively impact on discussions with debt providers for the debt portion of the CPP financing, which Triton will continue in the first quarter of 2022.
Triton previously estimated that the CPP would require a capital investment of between $32-million and $52-million, which is significantly less than the $99-million estimate for the 60 000 t/y plant considered in the DFS.
Refinement of the CPP desktop study is ongoing, and along with a strategic review into the Ancuabe project, will be completed before the end of 2022, while a DFS for the CPP and a final investment decision are expected by mid-2022, allowing for first production by the third quarter of 2023.
Key Contracts, Suppliers and Consultants
Lycopodium and ADP Group (process and plant infrastructure); Knight Piésold (tailings and water storage facilities and site geotechnical investigations); CSA Global (geology and resources, as well as mining and mine design); IMO, ALS Metallurgy (metallurgical testwork); Major Drilling (project drilling); Intertek and Bureau Veritas (assays); EOH Coastal & Environmental Services Limited (environmental-, social- and health-impact assessment); and MCC International (construction contract).
Contact Details for Project Information
Triton Minerals, tel +61 8 6489 2555 or fax +61 8 6489 2556.