| 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 | |
