Cyprium's Nifty leach commissioning reaches key milestones

• 212 production and monitoring wells established on Pad 6
• Approximately 1.7 million tonnes of near-term leachable material accessed
• Initial copper-to-acid ratio broadly in line with modelled assumptions
• High-voltage power connected to SXEW infrastructure
• First copper cathode still targeted for Q4 2026

Nifty heap leach reaches production-scale commissioning

Cyprium Metals (ASX:CYM) has moved its Nifty restart another step towards production, reporting that direct-injection heap leaching on Pad 6 has achieved target injection rates and volumes. The company says solution flows are appearing in monitoring wells as expected, while leaching volumes are being increased ahead of the solvent extraction and electrowinning plant coming online.

The update builds on the , when Cyprium said acid commissioning had begun on Nifty's existing heap leach pads. The latest results are operational rather than financial, but they provide an early check on whether the old heap material can accept solution through the company's pressure-injection approach.

212 wells open access to 1.7 million tonnes

Cyprium has completed and cased 198 additional production and monitoring wells across Heaps 13 to 16, taking the Pad 6 total to 212 wells. The near-term production area contains approximately 1.7 million tonnes of material, which the company expects to support six to eight months of leaching before further production blocks are drilled, cased and commissioned.

Composite samples from 24 wells reconciled within plus or minus 5% of the grades in Cyprium's existing Mineral Resource block model. That result is presented as validation of the production block model, though it covers a limited sample of the broader heap inventory and does not by itself establish sustained operating performance.

Early leach chemistry tracks modelled assumptions

Initial solution results showed average free-acid consumption of about 4.25 grams per litre. Copper concentration in the off-flow solution increased by roughly 1 gram per litre to approximately 1.3 grams per litre, with Cyprium describing that as an intermediate leach solution grade that can be recirculated until it reaches a targeted 2.5 grams per litre or higher for SXEW recovery.

The resulting copper-to-acid ratio was about 1:4.25, which the company said was within the range of earlier column tests and in line with, or better than, its modelled assumptions. These are early commissioning observations rather than proof of future recovery rates, economics or steady-state production. High-voltage power has now been connected to the SXEW electrical infrastructure and controls, with wet commissioning and the

Bottom Line?

The next test is not whether the wells can inject solution, but whether Cyprium can sustain and expand those flows while building copper inventory for SXEW and delivering the first cathode on schedule.

Questions in the middle?

• Can injection rates and copper-to-acid performance remain consistent as leaching expands beyond the initial blocks?
• How quickly will copper in solution build to the grade required for SXEW commissioning?
• Will wet commissioning and ramp-up keep first cathode production within the Q4 2026 target?