Pyrites Plant


Ownership: 100% Fresnillo plc
Location: Zacatecas, Fresnillo District
Facilities: Leaching plant
Anticipated production: Annual average 3.5 moz silver and 13 koz gold
Capex: US$155m
  • 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
  • During 4Q16 detailed engineering was concluded and further progress of the leaching plant construction is anticipated in 2017
  • Annual production of 3.5 moz of silver and 13 koz of gold is expected once the plant is commissioned in 1H18 and reaches full capacity

Key developments:

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


  • Further progress of the leaching plant and commence construction