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Esperanza, Fourth Optimization Project

Project Stages

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Early Works
Environmental & Social evaluation
Start: 06/2013
Completion: 11/2013
In Construction
Current Stage In production
Project Details


The project entails boosting the mine's throughput to an average of 105,000t/d copper with a maximum set at 110,000t/d via the optimization of existing facilities. The optimizations planned for this purpose include constructing a new fine crushing plant and expand the service life of the existing one. At the same time, the initiative includes implementing a new cleaning stage into the operation, increasing the capacity of existing concentrate thickening and constructing a sodium metabisulfite addition plant. Finally, considers constructing a new thickener and incorporating a 3.2MW backup power generation plant.

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  • * Figures and dates are as per the latest publicly available information, as well as information gathered by BNamericas reporters and analysts and are subject to change.

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Key Specs

Full Name
Esperanza, Fourth Optimization Project
Project Type
Development Phase
In production
Project Status
Project Capacity
 t/y (tons per year)  Copper
US$ 430mn
Completion Date

Works of the project are located at Minera Esperanza’s mine-plant sector, which is located 30km of Sierra Gorda, in Chile’s region II.

* The map coordinates provided represent the approximate latitude and longitude, and not the exact location, of the project in question.



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Owner / operator
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Environment Manager
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