The scoping study for Armadale Capital PLC's Mahenge Liandu graphite project in Tanzania estimated a posttax net present value, discounted at 10%, of US$239 million, an 89% internal rate of return and a 1.2-year payback period.
The scoping study pegged 400,000 tonnes per annum of throughput, producing an average of 49,000 tonnes per annum of high-quality graphite products during a 32-year mine life.
Based on an average life-of-mine grade of 12.5% total graphitic carbon, or TGC, the operating cost was estimated at US$408 per tonne.
The capital cost is expected at US$35 million, according to a March 27 release.
The company said the average basket price used in the scoping study of US$1,271/tonne could increase as off-take agreements are negotiated.
The resource estimate at the Mahenge Liandu project was recently upgraded to 51.1 million tonnes at 9.3% TGC, using a 3.5% TGC cutoff.
Armadale said it now plans to kick off a definitive feasibility study and advance the project to a decision to mine in early 2019.