Potencial de crecimiento
Hot Chili has been exploring and developing projects within the Huasco Valley for over a decade. The Costa Fuego PFS marked a milestone in this journey, and Hot Chili advances with outstanding growth potential continuing into the next development phases and beyond
Open Pit vs Block Cave Trade-Off Study
The 2025 Costa Fuego PFS considers an underground block cave mining operation in addition to the three open pits (Cuerpo 1, Cuerpo 2, and Cuerpo 3) at the Cortadera deposit, with development to the cave commencing in year 3 in the project schedule.
As part of the PFS, a trade-off study was completed comparing the 2025 PFS plan with a single open-pit option (at Cortadera), removing the block cave.
The key objective of the trade-off was to determine whether the Costa Fuego Project could still be economically viable while removing the operational risk associated with block cave mining.
The trade-off study found that a pit-only scenario would also be cash positive for the Project, but failed to materially improve the PFS economic outcomes.
Pyrite Flotation
Pyrite flotation has been included in all flotation test programs conducted since 2020, comprising more than 100 individual tests. Flotation of pyrite has several material project benefits:
- Rendering the tailings non-acid-forming
- Providing a source of sulphur for making sulphuric acid in a dedicated plant on site
- Providing a means of generating additional acid within heap or dump leaching
The treatment of recovered pyrite concentrate opens the potential for increasing revenue by:
- Allowing the recovery of cobalt which is bound within the pyrite lattice
- Recovering additional copper currently sent to tailings
- Enhancing the recovery of other metals that were unrecovered in copper-molybdenum flotation, including gold, silver and molybdenum.
Plant Design
There is an opportunity to optimise plant design by reconfiguring the infrastructure layout to better align with the natural terraces of the topography. This approach could reduce the need for elevated platforms and reduce earthmoving requirements, thereby lowering construction capital
COARSE PARTICLE FLOTATION
The application of coarse particle flotation (CPF) could be tested to potentially improve operating costs through reducing the need for excessive grinding and lowering reagent consumption. CFP could also benefit tails thickening by generating coarser, faster-settling tailings, leading to greater thickener efficiency, and improved water recovery.
Recovery of By-product Metals from Leaching
Testwork indicates that the high chloride and strong acid basis adopted for leaching may recover, in addition to copper, metals such as gold, silver, molybdenum and cobalt. Opportunities for recovering low levels of these metals from leach liquors are being explored.
RopeCon Design Optimisations
The PFS included a design where the RopeCon passed overhead of the Pan American Highway, achieving the required vertical clearances from the highway and from regional powerlines.
An alternative design procured by Hot Chili includes an underpass model via a tunnel. The PFS included a trade off study where the tunnel was sized for mining fleet, and ongoing works include revisiting this trade off study for a reduced tunnel profile.
Tailings Storage Facilities
The PFS delivered a combination of conventional valley hosted tailings storage, along with in-pit deposition for a combined 500Mt capacity. This design capacity is adequate for the PFS, however would not account for growth during the life of the Project. The dam break assessment returned a classification of "Extreme" due to proximity to Vallenar. Ongoing works include the review of additional or alternative tailings storage facilities that may allow for increased capacity and reduced risk.
Automation
The integration of autonomous mining equipment (trucks, drills, and loaders) could boost operational efficiency by enabling 24/7 operations. Automation also reduces the need for human intervention, minimising safety risks.
Electrification
The implementation of an electric-powered mining fleet would reduce fuel costs and carbon emissions, improving the Projects sustainability and cost-efficiency. For the underground block cave operations, electrification would lower heat generation and significantly decrease exhaust emissions, reducing ventilation requirements. With abundant solar energy resources available in the Atacama region of Chile, electrification could present significant benefit to the Costa Fuego Project.
PREGUNTAS COMUNES
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What is the Costa Fuego Copper-Gold project?
Read more about Costa Fuego on our project page or in the PFS Infosheet below
READ THE INFOSHEET -
What minerals are at Costa Fuego?
The main economic mineral is chalcopyrite, a sulphide containing copper.
The deposit contains other economic elements such as gold, silver and molybdenum which are included within the "copper equivalent" calculation used to describe the value of the deposit.
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