Pyrites Plant

Ownership: 100% Fresnillo plc
Location: Zacatecas, Fresnillo District
Facilities: Leaching plant
Commercial Production: 1H18
Anticipated Production: Annual average 3.5 moz silver and 13.0 koz gold
Capex: US$ 155 million

This facility is expected to increase silver and gold recovery rates by processing tailings, both historical and ongoing, from the Fresnillo and Saucito mines. The plant will froth float pyrite concentrates that will be leached in a 2,000 tpd dynamic leaching plant and Merrill Crowe plant to produce precipitates.

Key developments:

  • Board approval obtained for resumption of Pyrites project given improved market conditions
  • Completed detailed engineering works, obtained environmental permits commenced preparation of the site and placed orders for major equipment


  • First phase leaching plant expected to come on line in late 2Q18, and the tailing flotation facility by 2019