Ask HN: Why are electronics still so unrecyclable?

Physical and Logistical Challenges

• Electronics are heterogeneous composites: PCBs, plastics, metals, doped silicon, adhesives, batteries, displays, etc., all tightly integrated and often heat‑resistant and chemically stable.
• Collecting small items from many sources and transporting them to processing sites is costly; high-volume bulk materials (e.g., aluminum cans) are much easier.
• Separating mixed materials and hazardous components, then purifying tiny quantities of valuable elements, is difficult and energy-intensive.
• Several comments frame this as an entropy problem: turning a highly mixed, “cake batter” system back into purified inputs inherently takes a lot of work.

Economics and Incentives

• Multiple commenters say the core reason is cost: recycling electronics is usually more expensive than landfilling and making new products.
• Most materials in electronics (e.g., silicon, plastics) are cheap; trace precious metals often don’t justify the processing energy and labor.
• Manufacturers optimize for manufacturability, performance, and cost, not end-of-life. There’s little direct financial reward for designing recyclable products.
• Some argue disposal costs and full lifecycle responsibility should be internalized into product prices; others warn such mandates can have unintended effects (e.g., cited for nuclear).

Design, Repairability, and Regulation

• Thin, glued, highly integrated designs make both repair and recycling harder.
• Several people advocate “design for recycling/repair”: screws instead of glue, replaceable batteries, socketed or modular parts, published schematics, unlockable bootloaders.
• There is debate over how far this can be mandated: sockets and modularity can add failure modes and cost; regulations would need to be detailed and conservative.
• Examples cited: EU rules on replaceable batteries, charger reuse, and some positive cases like standardized form factors.

Reduce / Reuse vs Recycle

• Strong emphasis that “reduce, reuse, recycle” is ordered for a reason: extending device lifetimes and repurposing (e.g., installing Linux, hobbyist part harvesting) is far more effective than recycling.
• Some doubt voluntary reduction will ever be enough and call for legal limits on consumption or durability requirements; others emphasize the growing importance of waste management regardless.

Effectiveness and Ethics of Current Recycling

• Many commenters are skeptical of how much is truly recycled, especially plastics; much “recycling” is said to end up in landfills or exported to countries with weak environmental protections and unsafe practices (e.g., open burning for metals).
• Lead-acid batteries and some metals are recycled at scale but with notable environmental and worker-safety issues.
• Several conclude that, in practice, very few consumer products are genuinely recyclable in a closed-loop, low-impact way.

Technological Approaches and Thermodynamics

• Ideas like ultra-hot furnaces, plasma, ionization, grinding-and-separation, and novel chemical processes (e.g., protein-based gold recovery, flash joule heating) are mentioned.
• There’s disagreement on whether thermodynamics is the primary barrier: some say the second law makes “unmixing” inherently costly; others argue that, energetically, concentrations aren’t the main issue and that current technology and economics are the real limits.
• New processes may improve metal recovery, but commenters doubt they will change the fundamental economics enough to make electronics broadly “easy to recycle” without strong policy and design changes.