Company: RTNTF
Filing Date: 2025-02-20
Form Type: 20-F
Source: 0001628280-25-006642
Chunk: 434

Company: RIO TINTO LTD
Filing Date: 2025-02-20
Form: 20-F
Chunk 434
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 operations. No meaningful relationship has been established between the product and feed grades of alumina and phosphorus, so these grades cannot be reported for Mineral Reserves. Saleable product is produced to meet silica grade specifications, so the Mineral Reserves silica grade is the targeted silica grade for the currently anticipated long-term product mix. Loss On Ignition (LOI) is not determined for resource drilling samples, so no estimate of %LOI is available for Mineral Reserves. 8. Simandou Mineral Reserves tonnes are reported on a dry weight basis and Simandou Mineral Reserves relate to the Ouéléba portion only of the SimFer Iron Ore Project.

| Annual Report on Form 20-F 2024 | 281 | riotinto.com |

Production, Mineral Reserves, Mineral Resources and operations | Mineral Reserves

| Total Mineral Reservesas at 31 December 2024 |       |        |         |      |       | Rio Tintointerest | Rio Tintosharemarketableproduct |       | Total Mineral Reservesas at 31 December 2023 |        |         |      |       |
| Tonnage                                      | Grade |        |         |      |       |           Tonnage |                           Grade |       |                                              |        |         |      |       |
| Mt                                           |  % Fe | % SiO2 | % Al2O3 |  % P | % LOI |                 % |                              Mt |    Mt |                                         % Fe | % SiO2 | % Al2O3 |  % P | % LOI |
| 1,320                                        |  61.4 |    3.7 |     2.1 | 0.13 |   5.7 |              86.2 |                           1,320 | 1,251 |                                         61.7 |    3.6 |     2.0 | 0.13 |   5.6 |
| 500                                          |  62.2 |    3.0 |     1.8 | 0.06 |   5.5 |              80.5 |                             500 |   555 |                                         62.1 |    3.1 |     1.9 | 0.06 |   5.6 |
| 410                                          |  57.5 |    4.9 |     2.0 | 0.06