Andean Copper Expansion
A staged nitrogen and oxygen infrastructure package supported a ramp-up program where the operator needed better utility resilience without overloading an already busy maintenance team.
These examples illustrate the type of work Air Liquide supports: projects where gas supply continuity, safety planning, and field execution all need to stay aligned under schedule pressure. The details vary from one customer to another, but the pattern is consistent. Successful programs begin with a realistic understanding of plant conditions, continue with prepared mobilization and installation planning, and remain supported after startup so the system stays dependable long after the first production milestone. We highlight references like these because reliable performance is best understood through operating context, not isolated product claims.
A staged nitrogen and oxygen infrastructure package supported a ramp-up program where the operator needed better utility resilience without overloading an already busy maintenance team.
Field service mobilization and storage system reviews helped stabilize supply continuity after repeated interruptions linked to inconsistent maintenance preparation.
Modular gas handling skids and support planning allowed the operator to improve plant utility reliability while keeping shutdown duration within a narrow seasonal window.
Each reference started with a specific operational problem such as limited delivery access, unstable utility continuity, or expansion pressure on an existing plant layout.
Equipment, spare coverage, and mobilization details were adjusted to fit the real operating environment instead of treating the site like a generic application.
The final step was ongoing support so early lessons could be translated into better maintenance routines and more dependable utility performance.
Because specification choices rarely sit with a single owner, we document the selection envelope so procurement, operations, and reliability teams can align on duty classification, compliance route, and service strategy before any package is committed.
Electric drive removes underground diesel particulate exposure, reduces ventilation duty by roughly 30–50%, and aligns with 2030 decarbonisation targets adopted by most tier-one operators since 2021. Typical constraints: charging infrastructure capital (USD 2–5 million per shaft), cable-handling discipline, and limited availability at ambient temperatures above 45 °C.
Diesel power remains the proven choice where charging infrastructure is absent or where mine life is under seven years. Tier 4 Final engines in the 250–1,500 kW range keep availability above 90% on most fleets, at the cost of ventilation load, carbon reporting exposure, and a total cost of ownership penalty over a 10-year horizon.
Full autonomy delivers 24/7 duty cycles without fatigue-related derating and produces consistent production records — Rio Tinto's Pilbara iron ore network, commissioned in 2018, is the most frequently cited benchmark. Realistic preconditions: mine plan stability, high-quality survey data, and a 3G/LTE or private 5G coverage layer.
Operator-assisted fleets stay better suited to variable geology, mid-life mines, and jurisdictions where workforce retention is part of the social licence to operate. Teleoperation and assisted-drill retrofits can capture much of the safety uplift without the full autonomy capital profile.
OEM-only keeps warranty coverage and engineered tolerances intact, and is usually the right call for safety-critical interfaces (brake systems, pressure vessels certified to ASME VIII, IECEx-rated enclosures). Qualified aftermarket parts can reclaim 30–60% of spend on wear liners, grinding media, and screen mesh where the metallurgy is independently certified. Our selection rule: OEM for regulated interfaces, aftermarket for wear consumables with documented metallurgy and MSHA/CE acceptance.
Dry processing (HPGR plus air classification or dry magnetic separation) can cut water consumption by more than 90% and eliminate the tailings-dam liability that has driven regulatory tightening since the 2019 Brumadinho failure. Limitations: lower recovery for fine oxide ores (typically 3–8% below wet baseline) and higher dust-management capital. Wet processing remains the default where recovery dominates economics and where flotation chemistry is mature. Hybrid circuits — dry pre-concentration feeding a smaller wet flotation stage — are increasingly used to bridge the trade-off.
| Parameter | Typical operating range | Out-of-envelope condition |
|---|---|---|
| Throughput capacity | 500 – 2,000 t/h (crushing & screening circuits) | Above 2,500 t/h requires staged crushing; below 300 t/h favours modular skids |
| Flow rate (slurry pumps) | 50 – 5,000 m³/h | High-solids duties above 65% by weight require dedicated tailings-grade hydraulics |
| Head pressure | 20 – 200 m (single-stage centrifugal) | Multi-stage or booster train required above 200 m; NPSH-critical below 20 m |
| Engine / prime mover | 250 – 1,500 kW (Tier 4 Final, Stage V) | Not suitable for ambient > 50 °C without derate; electric drive not recommended on mines with fleet life < 5 years |
| Drilling depth | 30 – 500 m | Deep geothermal above 500 m requires high-temperature drill string and specialised mud program |
| Generator output | 500 – 5,000 kVA | Parallel sets above 5,000 kVA demand dedicated switchgear and protection coordination studies |
Values reflect typical mining and energy duty envelopes. Actual package sizing depends on classified-area rating (ATEX, IECEx, MSHA, API Spec Q1), altitude, ambient, and owner-specific compliance routes.