JV video: Retrofits can disarm diesel rules

Key Concepts

• Diesel Particulate Matter (DPM): A key component of diesel exhaust, regulated due to health risks. Measured in milligrams (mg) or micrograms (µg) per cubic meter.
• Tier 4/Stage 5 Machines: Diesel engines with advanced factory-installed aftertreatment systems designed to reduce emissions. Still require maintenance.
• Retrofit: Modifying existing diesel equipment with aftertreatment systems to meet current emission standards.
• Aftertreatment Systems: Technologies used to reduce harmful emissions from diesel engines, such as Diesel Particulate Filters (DPFs).
• Ventilation: Increasing airflow in mines to dilute emissions.
• Electrification: Replacing diesel equipment with battery-powered electric alternatives.
• DPF Regeneration: The process of burning off accumulated particulate matter in a Diesel Particulate Filter. Crucial for maintaining filter performance.

Air Quality & Emission Regulations in Mining

The mining industry, particularly underground operations, is facing increasing pressure to improve air quality and reduce worker exposure to harmful emissions. This is driven by stricter occupational exposure rules, the trend towards deeper and hotter mines, and growing investor demands for environmental responsibility. Recent regulations in Canada (established in 2023) specifically target Diesel Particulate Matter (DPM), a component of diesel exhaust. Ontario currently leads Canada with a regulation of 0.12 mg/m³ (or 120 µg/m³), while Australia is proposing a more stringent limit of 0.01 mg/m³ (10 µg/m³). These tightening restrictions are a global trend. Beyond DPM, comprehensive air quality assessments should also include hydrocarbon counts and NO2 output.

Pathways to Reducing Diesel Emissions

There are three primary approaches to reducing DPM levels in underground mines:

1. Ventilation: Increasing airflow to dilute emissions. This involves structural changes to the mine, including fans and air exchange systems, and can be costly.
2. Electrification: Utilizing battery-powered electric equipment, eliminating diesel emissions entirely. This represents a significant capital investment and a shift in operational paradigm.
3. Retrofit: Installing aftertreatment systems on existing diesel equipment. This is often the fastest and most cost-effective solution, particularly for machines recently acquired (within the last few years).

Currently, retrofit solutions are driving the market due to their immediate impact and avoidance of large capital expenditures or extensive mine restructuring.

Baseline Data & Testing for Emission Control

Before implementing any emission control strategy, a mine must establish a baseline understanding of its current emissions. This involves:

• Auditing Emissions: Measuring DPM output from individual machines.
• Comprehensive Air Quality Assessment: Analyzing hydrocarbon counts and NO2 output in addition to DPM.
• Prioritization: Identifying the highest-emitting machines for potential retrofit or replacement.
• Expert Collaboration: Working with a service provider to interpret data and develop a tailored strategy.

Australia’s Influence & Mammoth Equipment’s Experience

Australia has been a pioneer in diesel aftertreatment regulations for underground mines. Mammoth Equipment, celebrating 50 years in business (founded 1974/75), has been actively involved in this evolution for the past two decades. Australia’s focus on worker health and safety has driven Mammoth to continuously improve its products and solutions. This experience has been directly applied to Mammoth’s operations in Canada (since 2014) and globally, assisting mining operations in meeting evolving DPM regulations and improving worker safety in regions like Ontario and Quebec.

Challenges with Tier 4/Stage 5 Machines & Cold Climates

While Tier 4 and Stage 5 diesel engines come equipped with factory-installed emission systems, these systems still require regular maintenance. Operators are encountering issues, particularly in cold and northern climates, including:

• Filter Cleaning: Regular cleaning of filters is essential for optimal performance.
• Performance Issues: Neglecting maintenance can lead to reduced engine performance.
• Idle Times: Emission systems can contribute to increased idle times.
• Freeze-Ups & Crystallization: Cold temperatures can cause filters to freeze or crystallize, hindering their effectiveness.

Mammoth Equipment’s Approach to Partnership

Mammoth Equipment offers a comprehensive, partnership-based approach to emission control:

• On-Site Audits: Conducting assessments to identify pollution sources and prioritize solutions.
• Tailored Solutions: Developing customized strategies based on specific mine equipment and environmental factors.
• Retrofit Solutions: Providing and installing DPFs and other aftertreatment technologies.
• Maintenance Programs: Offering filter cleaning and replacement schedules.
• Cold Climate Solutions: Providing products like “Freeze Guard” and thermal blankets to ensure DPF regeneration in cold environments.
• Integrated Support: Acting as an extension of the mine’s team to manage emissions and allow focus on core operations. As Holden Bunko stated, “Mammoth acts as your part of your team almost…we take that off your plate so that you can focus on the daily operation of your mindsite.”

Conclusion

The mining industry is facing a critical juncture regarding air quality and emissions. Stricter regulations, coupled with the challenges of deeper mines and investor pressure, necessitate proactive emission control strategies. Retrofitting existing equipment, coupled with diligent maintenance of advanced emission systems on newer machines, represents a practical and effective pathway to compliance and improved worker safety. A collaborative partnership with experienced providers like Mammoth Equipment, offering comprehensive assessment, tailored solutions, and ongoing support, is crucial for navigating this evolving landscape. The key takeaway is that managing emissions is not merely a regulatory requirement, but an investment in worker health, environmental responsibility, and long-term operational sustainability.