Containerized gold
recovery from electronic waste.
A complete iodine leaching plant, fitted inside a single shipping container.
Every IODEx unit is engineered to order around your feedstock — crushed PCBs, RAM, CPU pins, mixed e-scrap, low-grade dust. The leach circuit, filtrate handling, electrowinning cell, iodine regeneration loop and tailings solid-return are integrated into a 20' or 40' HC container with all pumps, sensors and control panels pre-mounted.
No civil works. No concrete pad. No fixed plumbing. Set the container on flat ground, connect three-phase power and a water make-up line, and the plant is ready for commissioning.
Crushed e-scrap loaded to hopper
Pre-shredded and milled feed (≤ 2 mm) is dosed into the agitated leach reactor via a sealed screw conveyor. Negative pressure in the hopper prevents dust escape.
Iodine–iodide dissolution of gold
Gold is dissolved into the I₂ / I⁻ aqueous complex under agitation at ambient temperature. No pressure vessel, no acid mist, no NOx — the chemistry is contained and recirculated.
Solid–liquid separation
Pregnant solution is filtered from solids through a chamber filter press. Solids are washed and discharged as decontaminated tailings; pregnant solution is routed to recovery.
Gold deposited onto cathode
Direct current plates metallic gold onto a stainless-steel cathode. The depleted iodine solution flows back to the regeneration loop — closed circuit, no liquid discharge.
Iodine recovered and reused
Iodide is oxidised back to elemental iodine in a dedicated reactor and returned to the leach circuit. Total iodine inventory stays inside the unit — make-up is minimal.
Decontaminated solids returned
Depleted solids exit as a dry cake, stable and free of leachable gold and iodine. Suitable for downstream metals recovery or controlled disposal — no liquid effluent stream.
Mobile. Permit-light. Closed-loop.
A stationary gold-recovery plant takes 12 to 24 months of permitting, civil works and commissioning before the first kilogram is poured. An IODEx container is delivered, set on flat ground, and producing in 72 hours. The chemistry is closed — nothing leaves the box except decontaminated solids and finished gold.
Mobile by design
Built into a standard ISO 20' or 40' HC container. Ship it by truck, rail or sea. Relocate between sites as feedstock moves — no decommissioning, no fixed asset left in the ground.
Permit-light classification
Non-stationary equipment classification in most jurisdictions shortens the approval path substantially. No building permit, no fixed-installation environmental impact assessment, no permanent discharge consent.
Plug-and-produce
Pre-commissioned at the factory. On site, connect three-phase power, water make-up and an inert-gas line. Cold start to first gold pour in 72 hours. No specialist installation crew on standby.
Closed-loop chemistry
Iodine lixiviant recirculates inside the unit. Pregnant solution goes to electrowinning; spent solution regenerates back to iodine. Total liquid effluent: zero. Make-up iodine under 0.5 % per cycle.
Environmentally contained
No cyanide. No aqua regia. No acid mist. No groundwater contact. Negative-pressure enclosure captures all vapours through a scrubber. Tailings exit as a dry, stable, iodine-depleted cake.
Engineered to your feedstock
Every unit is sized and configured around your specific e-scrap stream — PCBs, RAM, CPU pins, mixed dust. We dial residence time, reactor volume and electrowinning capacity to match the grade and mass flow you actually have.
Operating envelope.
Reference parameters for the IOD-LEACH-C20 / C40 series. Final configuration is set per project after feedstock characterisation.