Chilean mining and the urgency to automate
Chile is the world's largest copper producer and the second largest lithium producer. Its operations — spread across the north of the country, many at extreme altitude and in harsh weather — face growing pressure: falling ore grades, rising operating costs and increasingly strict regulatory requirements on water, energy and safety.
In that context, industrial automation stops being an option and becomes an operational necessity. Operations that have already adopted PLCs, SCADA and Industry 4.0 report operating cost reductions of 15 to 30%, with significantly less unplanned downtime.
Unique challenges of automation in mining
Automating a mine site is technically more complex than automating an urban manufacturing plant. The specific challenges include:
- Extreme distances — equipment spread over kilometers of terrain with no network infrastructure
- Severe environmental conditions — dust, vibration, extreme humidity, temperatures between -20°C and +45°C
- Altitude — many operations run above 3,000 meters, which affects electronic equipment and cooling
- Limited connectivity — areas with no cellular coverage where cabling is not feasible
- 24/7 operation — extremely short maintenance windows
- Equipment from multiple brands and different decades — new PLCs coexisting with legacy equipment that is 20+ years old
Key technologies for automated mining
PLCs and distributed control systems
PLCs (Programmable Logic Controllers) are the core of process control in mining: they control conveyor belts, mills, flotation plants, slurry pumps and ventilation systems. In modern operations, PLCs are integrated into distributed control system (DCS) architectures that allow centralized supervision of the entire operation.
SCADA for comprehensive supervision
A SCADA system in mining centralizes the supervision of all critical equipment: equipment status, alarms, process trends, energy consumption by area. Platforms such as Ignition are especially valued in mining for their scalable licensing model — an operation can grow from 100 to 10,000 tags with no additional cost per point.
LoRaWAN wireless sensors
For remote measurement points where cabling is not feasible, LoRaWAN sensors are the solution. With ranges of up to 15 km in open terrain and batteries that last years, they make it possible to monitor temperature, vibration, tank level, canal flow and environmental conditions without network infrastructure.
Historian and data analytics
The industrial Historian stores the complete history of all process parameters. In mining, this enables performance analysis of rotating equipment (mills, pumps), correlation between process variables and concentrate quality, and the foundation for predictive maintenance.
OEE in mining: measuring what matters
OEE (Overall Equipment Effectiveness) applies to mining just as it does to manufacturing. On a conveyor belt or a SAG mill, the three components of OEE take on a very concrete meaning:
- Availability — the time the equipment was operational vs. planned time. Every hour a mill is stopped means tons of unprocessed ore
- Performance — actual tonnage processed vs. the equipment's nominal capacity
- Quality — metal recovery percentage, final concentrate grade
Predictive maintenance on critical equipment
The most expensive equipment at a mine site — mills, high-pressure pumps, compressors, conveyor belts — is also the equipment that hits production hardest when it fails. Predictive maintenance based on vibration and temperature makes it possible to detect bearing deterioration, shaft imbalance and lubrication problems weeks before they turn into a catastrophic failure.
The implementation combines wireless vibration sensors on critical equipment, continuous historization of the signals, and anomaly detection algorithms that alert the maintenance team when patterns deviate from normal behavior.
OT cybersecurity at mine sites
As mine sites become connected — for remote telemetry, supervision from head offices in Santiago, ERP integration — the cyberattack surface grows. Mining control systems are targets for ransomware and industrial sabotage. Proper OT network segmentation, with industrial firewalls between the control network and the corporate network, is now a non-negotiable requirement in large-scale operations.
Roadmap for automating a mine site
- Connectivity and OT asset assessment — inventory of PLCs, protocols and instrumentation gaps
- Prioritize critical equipment — mills, pumps, compressors — by impact on production
- Implement Historian and SCADA — real-time visibility before attempting to optimize
- Calculate real OEE — identify where the tons are being lost
- Deploy wireless sensors — for remote points without cabling
- Predictive maintenance — with 6+ months of historical data from critical equipment
Do you have a mine site that needs automating?
Grupo Salba has experience automating continuous processes in Chile and Latin America. Initial assessment at no cost and with no obligation.
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