Materials used, broken down by weight or volume (tons)
Classification 2019 2020 2021
ROM (Internal supply) Non-renewable 12.984.367 10.656.539 12.216.550
Concentrates (Internal supply) 1.230.367 1.192.832 1.258.656
Other materials (External supply) 88.708 105.528 188.838
Other materials (Internal supply) 317.529 323.010 278.301
Total volume of main materials 14.620.971 12.278.909  13.942.345