Vale Base Metals to Deploy Coarse Particle Flotation at Salobo Copper Mine

Why It Matters

The upgrade positions Vale to meet rising copper demand with higher efficiency and lower energy costs, strengthening its competitive edge in a sustainability‑focused market.

Key Takeaways

• CPF enables 50% throughput increase without new ball mills
• Primary grind size rises to ~250 µm, cutting grinding energy
• Existing infrastructure upgraded, minimizing capital outlay
• Coarse tailings stream opens future waste‑management opportunities
• Additional compressors and pumps support higher water and air demand

Pulse Analysis

Coarse particle flotation represents a shift from traditional fine‑grind processing toward handling larger ore fragments directly in the flotation circuit. By leveraging HydroFloat® technology, Vale can increase the primary grind P80 to about 250 µm, which dramatically reduces the energy required for comminution. The approach also integrates a secondary classification stage that separates fine and coarse fractions, feeding the coarse stream into dedicated CPF cells while preserving the existing mechanical flotation line for finer material. This hybrid flow sheet maximises overall copper recovery and curtails re‑grinding of already liberated particles.

Operationally, the CPF deployment at Salobo III translates into a projected 50% capacity uplift without the need for additional ball mills, keeping capital expenditures modest. Upgrades to secondary crushers, screening equipment, hydrocyclone clusters, and the addition of vertical stirred mills ensure the plant can handle the higher mass flow. The project also expands compressed‑air and water‑pumping assets to meet the increased utility demand, while the new coarse tailings stream offers a pathway for future waste‑management innovations, potentially lowering tailings‑facility footprints.

For the broader copper sector, Vale’s move underscores the growing importance of energy‑efficient processing technologies as the market anticipates a sustained demand surge driven by electrification and renewable‑energy investments. Reducing specific grinding energy not only cuts operating costs but also aligns with ESG goals, enhancing the mine’s sustainability profile. If successful, CPF could become a template for other high‑grade copper operations seeking to boost throughput, improve recovery, and lower their carbon intensity without extensive new capital projects.