Name of the Project
Coburn mineral sands project.

Location
The project is located in the Gascoyne region of Western Australia.

Project Owner/s
Strandline Resources.

Project Description
An updated definitive feasibility study (DFS) has resulted in significant increases in forecasted financial returns for the project over an initial 22.5-year mine life.

The project has Joint Ore Reserves Committee-complaint ore reserves of 523-million tonnes grading 1.11% total heavy minerals for about 5.8-million tonnes of contained heavy mineral.

The mining study has confirmed a conventional openpit dry mining operation where free-dig unconsolidated sand is mined using heavy mobile equipment to transport material to dozer mining units. The units prepare the ore for processing and the ore is pumped in slurry form to the processing plant.

Bulk metallurgical testwork of representative samples using full-scale or scalable processing equipment has confirmed conventional processing capable of producing high-quality products, with exceptional pit-to-product recovery rates achieved within concentrate and the final product streams.

The DFS has further confirmed an efficient and modern process design capable of producing a high-grade saleable 95% heavy mineral concentrate product from the wet concentration plant, and final products through further processing by the mineral separation plant.

The project will produce four final products comprising a premium zircon product (66% zirconium dioxide), zircon concentrate product (which contains payable zircon, titanium and monazite minerals), rutile product (93% titanium dioxide) and a chloride-grade ilmenite product (62% titanium dioxide).

The updated DFS is still based on a throughput of 23.4-million tonnes a year, with an average production of 34 000 t/y of zircon, 54 000 t/y of zircon concentrate, 110 000 t/y of chloride ilmenite and 24 000 t/y of rutile, which are expected to supply about 5% of the global zircon market.

There is potential to further increase project reserves and mine life by about 15 years – to 37.5 – years through the conversion of resources extending north and along strike of the current ore reserves.

Potential Job Creation
Peak workforce during construction is estimated to be more than 300 people, with an average operational workforce during production of about 150 direct skilled workers.

Net Present Value/Internal Rate of Return
The project has a pretax net present value, at an 8% discount rate, of A$705-million, up from A$544-million in the feasibility study. The pretax internal rate of return has increased from 32% to 37%.

The project has a payback of 2.1 years.

Capital Expenditure
Capital expenditure has increased from A$257-million in the DFS to A$260-million in the updated DFS.

Planned Start/End Date
The project will take 18 months to design and build to achieve first ore to the process plant.

Latest Developments
Strandline Resources has awarded a A$21-million fixed price contract to supply in-pit dozer mining units for its Coburn mineral sands project.

The contract, awarded to Piacentini & Son, includes the design and construction of three mobile dozer mining units, and forms part of Coburn’s efficient dry mining methodology.

The contract is a key long-lead procurement package and is one of the conditions precedent to finalise project funding and prepare for production.

Strandline recently awarded a A$23-million contract to civil and mining contractor Macmahon for the construction of road access and bulk earthworks at Coburn.

Key Contracts, Suppliers and Consultants
R Engineering Services, AMC Consultants, IHC Robbins, AECOM and TZMI’s Allied Mineral Laboratories (DFS); SRK Consulting (technical due diligence of engineering designs and planning associated with geology, hydrology, mining, processing, infrastructure, logistics, implementation strategies, cost estimates and environmental, social and permitting); Deloitte Access Economics (independent economic cost-benefit analysis); TZ Minerals International (product quality and marketing); and Macmahon (construction of road access and bulk earthworks); and Piacentini & Son (in-pit dozer mining units).

Contact Details for Project Information
Strandline Resources, tel +61 8 9226 3130 or email enquiries@strandline.com.au.