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The case for HPSA

Spend energy on liberation, not on grinding.

Conventional comminution reduces particle size and hopes liberation follows. HPSA targets liberation directly — which changes the economics of everything downstream.

A different principle

Two ways to free a mineral.

Both approaches aim to separate the valuable mineral from the gangue. They go about it very differently — and that difference shows up in grade, recovery and operating cost.

Conventional grinding

  • Reduces particle size indiscriminately, hoping liberation follows.
  • Consumes grinding media — a steel cost, logistics burden and contamination source.
  • Tends to overgrind, generating slimes that hurt downstream recovery.
  • Large footprint, long installation windows, mill liners and maintenance.

HPSA

  • Targets liberation along grain boundaries and hardness differentials.
  • 100% mechanical — no grinding media, no chemical reagents.
  • Liberates at coarser grind sizes — fewer slimes, cleaner separation.
  • Skid-mounted, modular — short installation, integrates into existing circuits.
Why operators look at HPSA

Six reasons it earns a place in the circuit.

Higher recovery & grade

Cleaner liberation lifts the valuable mineral reporting to concentrate, across sulfides, oxides and industrial minerals.

Throughput, fixed base

More saleable product across the same plant and overhead — modules bolt into existing circuits in weeks.

£/t

Lower cost per tonne

Rising recovery and quality spread plant cost across more product, cutting the all-in cost per tonne of mineral.

No media, no reagents

The HPSA unit needs no grinding media and no chemicals of its own — liberation is purely mechanical, with no consumables to dose or replenish.

Modular & fast

Skid-mounted units with short lead and install times, minimal shutdown, and straightforward scaling from pilot to production.

Proven & verified

Demonstrated across 150+ ore campaigns, with commercial installations in North America and independent verification.

How we measure value

We frame the benefit where it hits your P&L.

HPSA's advantages are real, but they only matter if they show up in the economics of the mineral you sell. That's the lens we use — not abstract efficiency claims.

Recovery uplift

More of the target mineral reporting to concentrate instead of being lost to tailings.

More metal per tonne of ore

Throughput on a fixed cost base

More saleable product handled across the same plant, people and overhead.

More output, same footprint

Cost per tonne of mineral

The all-in cost to produce each tonne of valuable mineral — the figure that decides projects.

Lower cost per tonne of product
A cleaner footprint

Better economics and a lighter footprint aren't a trade-off.

Because HPSA concentrates value into less mass and needs no grinding media of its own, the same changes that improve economics can also reduce the volume of material handled and the physical footprint of the plant — relevant wherever HPSA replaces or supplements conventional milling, and in tailings and remediation work.

Convinced enough to test it?

The argument is only worth as much as the result on your ore. Let's run the numbers on your material.

Talk to Optimise Minerals