Plant and operations leaders are responsible for managing many aspects of aging electrical infrastructure, including disposal. Improper disposal of parts like transformers poses significant environmental, financial and legal risks. Drawing on insights from Sunbelt Solomon—a trusted leader in end-to-end electrical transformer solutions—this comprehensive guide outlines proper transformer recycling practices.

Navigating Environmental and Legal Compliance

The EPA governs transformer recycling through strict regulations, including those for materials contaminated with polychlorinated biphenyls (PCBs). These transformers are considered hazardous waste, and professionals must dispose of PCB transformers containing 500 ppm or more PCB dielectric in accordance with specific EPA requirements.

Qualified transformer recycling partners must offer transparency and clear, strict adherence to these legal requirements. Engineers and plant and operations leaders can look for those who:

• Provide proof of environmental compliance: Documentation and certificates of destruction can verify compliance with all regulations.
• Document safety procedures: Providers should have a clear and auditable process for handling equipment to protect both personnel and the environment.
• Demonstrate certifiable capabilities: Verifiable certifications prove they are qualified and legally capable of handling and disposing of hazardous materials.
  

The Transformer Disposal Process

Leading, reliable recycling facilities follow a detailed, multistep process to dispose of transformers safely, ensuring maximum material recovery. The following four steps are based on the strict practices of industry leaders such as Sunbelt Solomon and demonstrate the careful approach required to recycle transformers.

1. Material Assessment

First, teams assess the transformer to determine recyclability and classification. Professionals can test the PCB content to determine how to handle it, ensuring proper documentation and site inspection for legal compliance. The transformer’s material also makes a difference, as aluminum, copper and steel should be sorted and recycled to keep the metals in circulation for reuse.

2. Oil Recovery or Disposal

Oil draining is a critical part of the recycling process, as this material can be a hazardous contaminant. Reuse, reclamation or recycling can involve processing or filtration to keep the oil in circulation. Contaminated oil with higher PCB levels must be disposed of.

3. Breakdown and Part Removal

After draining, the teams can disassemble the parts. Professionals remove the tank, radiators and other external components first. Then, they will separate the core and coils and recover windings for recycling.

Cores are often steel, while windings may be aluminum and coils may be copper. Teams then strip the empty transformer tank of any gauges, valves and any remaining external parts before they cut down the tank and separate out the metals.

4. Material Staging and Recycling

Once teams have broken down all the transformer parts, they can sort each raw material into designated areas before sending it to certified recycling facilities or selling it for reuse. Professionals will properly decontaminate or incinerate contaminated materials in accordance with applicable regulations.

The Value of Recycling

As of October 2024, aluminum cost $2.63 per kilogram and copper cost $9.40 per kilogram. After properly recycling a transformer, entities can sell the resulting scrap to a scrap yard or recycler, giving them a slight financial boost. Copper sells for the most because it’s highly conductive and in short supply, thanks to its use as the primary material in electronics and wires. Both metals increased in value by over 20% compared to the previous year, so although these prices fluctuate, the return may be motivating.

Aluminum coils should weigh somewhere from 100 to 250 pounds, while copper ones can be 150 to 300 pounds. So, how much they’ll sell for depends on the metal and final weight. Reusable materials will then go back into production, and unusable ones will be properly disposed of to avoid e-waste.

Additionally, keeping these metals in use means less raw material is necessary. Mining operations then don’t have to take as much out of the ground, avoiding more emissions and protecting local environments.

Closing the Loop and Powering the Future

Proper transformer recycling is a complex but essential process. A trusted partner can help plants mitigate safety concerns, compliance risks and environmental hazards. By following best practices, certified experts simplify the process, maintaining peace of mind and accountability in the electrical industry.