Figure 8 - Isometric View of the Reserve Model for the Plan with Ore Sorting Source: Own elaboration 5.7 Reserve and Waste Quantification With the implementation of ore sorting in the base plan, a significant increase in total reserves is observed compared to the original scenario. This increase is mainly explained by the reclassification of previously marginal material and the optimization of the economic cut-off. The resulting reserves are distributed between the mine plan (LOM) and the material incorporated under the pre-concentration scenario, demonstrating improved selectivity of the processed ore and a redistribution of the mineable inventory. Likewise, a significant volume of material remains classified as waste, corresponding to grades below the defined economic threshold. Table 8 - Reserve and waste quantification Material NSR Range ($/t) Toneladas (Mt) Cu Grade (%) Zn Grade (%) Ag Grade (g/t) Mo Grade (%) LOM Reserves ≥ 17 100X 100A 100B 100C 100D Ore Sorting Reserves 10.5 – 17 23X 13.6A 8.3B 20.3C 170D Waste ≤ 10.5 85X 2.27A 1.7B 6.8C 21D To quantify the economic value generated by ore sorting, it is essential to determine the tonne of preconcentrate produced at the plant, since this is the material that enters the concentration process. From the ore sorting parameters, mass pull and upgrade, detailed in Section 3, the tonne of preconcentrate was calculated as the product of head grade tonne, additional tonne generated by the sorting process, and mass recovery, mass pull. Likewise, head grades were adjusted using the upgrade factors associated with each metal, which allowed the grades of the preconcentrate to be obtained.
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