Contributed by Dave Henning, Sales Manager, MCE Automation
If you’ve ever found yourself stuck by the side of the road kicking yourself for putting off some crucial bit of auto maintenance, then you know firsthand that an unscheduled breakdown can be dramatically more inconvenient and costly than whatever you were putting off.
When it comes to mining operations, an ounce of prevention can forestall extremely expensive headaches. The stakes are high and, according to Mining Weekly, a single shift of unplanned downtime can translate into millions of dollars in losses.
Maintenance happens one of two ways: the easy way — through smart preventative maintenance programs that let you control downtime — or the hard way, when operations grind to an unexpected halt.
The second path means longer outages, higher costs, and risks to productivity, safety, and profit. In mining, equipment reliability can even mean the difference between life and death, not just millions in lost productivity.
Air compressors are a prime example. Operations rely on them to run smoothly and continuously, making overlooked maintenance especially dangerous.
In mining, air compressors are sometimes known as the “fourth utility” (alongside water, electricity, and natural gas) because they’re so essential. They play a vital role in both surface and underground mining by providing a primary source of power for pneumatic tools, ventilation, and material handling.
In fact, some compressors run continuously in order to maintain the needed system pressure for the wide variety of tools and infrastructure needed in mining operations such as pneumatic tools, drilling pickers, pumps, fans, turbine lights, cranes, conveyors, loaders, excavators, ventilation & process air systems.
Despite their MVP status, compressors can get overlooked when planning equipment service and maintenance. Because compressors are exposed to extremely harsh conditions, their failure will have a domino effect on other systems, ultimately impacting the timelines and efficiency of the business as a whole.
Mining operations take place in punishing environments, including constant exposure to contaminants, abrasive dust, high humidity, fluctuating temperatures, mechanical strain, and confined underground conditions.
These stressors take a serious toll on the performance of air compressors. And without proper maintenance, that means compressors are subject to accelerated wear, corrosion and failure.
Air compressor leaks are a hidden drain on efficiency, resulting in wasted energy and lost money. The numbers tell the story: compressed air systems can typically lose between 30 to 50% of their volume to air compressor leaks, and poorly maintained systems may lose as much as 80%. As performance degrades, a single uncontrolled leak can destroy operational timelines.
And downtime costs mount quickly. An average mining equipment failure can cost $180,000 per incident, while some operations have reported losses as high as $130,000 per hour during critical downtime.
Top tips for air compressor health
Although an air leak audit by an expert is the ideal first step for compressor maintenance, the reality is that air audits aren’t always feasible because of safety and certification issues.
That said, here are some of the most important recommendations:
- Be on the lookout for pressure drops. Significant pressure drops are often a sign of air leaks, especially at hose fittings and connectors.
- Make sure to inspect fittings regularly. Even the small and silent leaks come with a cost, as they cause compressors to work harder — increasing energy use and wear. Always check hose joints and threaded connections.
- Choose durable piping first. Where possible, replace hose with aluminum air lines or smooth-wall pipe to reduce flow resistance and leaks. Even if complete replacement isn’t feasible, any strategic upgrade can improve performance.
- Don’t neglect site inspections. Compressed air divisions can use inspections to zero in on high-loss areas above ground. Underground inspections may be more difficult due to site-access restrictions — but surface systems will still benefit from proactive maintenance.
Air compressor maintenance tips
- Design and implement an annual preventive maintenance plan
- Replace filters and desiccant regularly (every 1-3 months for high demand environments)
- Have experts pair your compressors with desiccant dryers to ensure air purity
- Use infrared/ultrasonic leak detection tools to find and fix leaks early
- Use flow and pressure sensors to monitor system performance
- Establish a leak management program with ongoing tracking and repairs
Final considerations
Another great way to protect air compressor systems is by making use of containerized systems, which not only protect equipment but free up valuable indoor space. These are completely packaged, plug-and-play systems (typically enclosed in a large container) that include all the essential equipment: piping, wiring, and heating. Benefits include easy deployment, reduced costs, superior environmental protection, and improved serviceability because technicians can work on the units while they’re still operating.
One of the smartest ways to ensure success is by partnering with a maintenance provider that knows mining inside and out. Look for MSHA-certified technicians, including those with electrical certifications specific to mining environments. The right partner should offer preventative maintenance planning, troubleshooting, rebuilds, and spare parts management
With the right team and a consistent maintenance plan for your air compressors and other critical equipment, you can minimize unplanned downtime and protect production.
MCE Automation
mceautomation.com
