Recycling

Iridium Recycling: Current State and Potential

Recycling of Iridium from end-of-life products and manufacturing scrap represents an important secondary supply source. The current global end-of-life recycling rate for Iridium is approximately 15%, reflecting both technical challenges and economic factors in recovery.

Recycling Rate Context

At just 15%, the recycling rate for Iridium remains low, meaning the vast majority of supply must come from primary mining. This represents both a sustainability challenge and an opportunity for circular economy development.

Recycling Technologies

Current and emerging recycling technologies for Iridium include mechanical separation, pyrometallurgical recovery, hydrometallurgical extraction, and direct recycling approaches. These processes mirror primary production techniques such as base metal refining of pgm concentrate, adapted for secondary feedstocks. Research efforts focus on improving recovery rates and reducing energy consumption.

Key Recycling Sources

• End-of-life spark plugs for aviation products - Recovery potential varies based on product design, Iridium concentration, and collection infrastructure.
• End-of-life electrochemical catalysts products - Recovery potential varies based on product design, Iridium concentration, and collection infrastructure.
• End-of-life crucibles for crystal growth products - Recovery potential varies based on product design, Iridium concentration, and collection infrastructure.
• End-of-life hydrogen electrolysis products - Recovery potential varies based on product design, Iridium concentration, and collection infrastructure.
• Manufacturing scrap - New scrap from fabrication and processing typically has the highest recovery rates due to known composition and controlled collection.

Circular Economy Opportunities

Given the high supply risk for Iridium, developing robust recycling infrastructure is a strategic priority. The 85% concentration of primary production in South Africa makes secondary supply from recycling an important hedging strategy for consuming nations. Regulatory frameworks such as extended producer responsibility and recycled content mandates are being developed in multiple jurisdictions.