Optimisation at Fresnillo

Optimisation of the beneficiation plant at Fresnillo

Ownership: 100% Fresnillo plc
Location: Zacatecas, Fresnillo district
Facilities: Zinc thickener (phase I), flotation cells (phase II) and vibrating screens (phase III)
Commercial production: Fully operational only when mine is developed and prepared for expansion
Anticipated production: Average annual production of 3 moz silver
Total approved capex: US$30 million

The main objective of this project is to increase processing capabilities at the Fresnillo beneficiation plant to cope with the higher lead and zinc grades currently being mined at deeper levels of the mine.

A three-stage project; the first was completed in 2017 and comprised of the installation of an additional zinc thickener. Construction of the second phase installation of floatation cells is advancing and is due to be concluded in 2H20. The third and final stage, increasing plant capacity to 9,000 tpd from its current capacity of 8,000 tpd through the use of vibrating screens, will only be undertaken when the mine is able to sustain a consistent level of development, sufficient to support this higher level of processing capacity.


  • Phase I completed 2017, phase II currently ongoing and phase III will occur only when the mine is sufficiently developed and prepared in order to sustain the increase in capacity to 9,000 tpd
  • Good progress made, with installation of addtional flotation cells advancing in accordance with timeline

2020 Priorities

  • Conclude construction of second phase of this project by year end