ALS2 gold recovery from legacy telecom boards
Retired telecommunications equipment creates a concentrated feedstock for precious-metal recovery. Edge connectors on legacy boards commonly combine gold-plated copper contacts with nickel, palladium or other plated layers. Their small mass hides a disproportionately valuable metal content, particularly once copper, solder and laminate have already been separated. For Australia, this material is becoming more accessible as ageing copper networks and obsolete switching platforms are replaced. Learn more about Developing A Custom Vision Algorithm.
The ALS2Project approach targets that connector-rich fraction rather than treating every circuit board alike. Ikoi S.p.A. presents ALS2 as an acidless separation technology designed for safer, cleaner precious-metals recovery and compact plants. ALS2 processing of gold from edge connectors on legacy telecom boards can therefore sit alongside approved e-waste dismantling, where boards are depopulated and connector streams are separated before refining.
Why legacy telecom contacts matter
Legacy equipment differs from modern electronics because component layouts, plating practices and connector types vary by manufacturer and installation date. A single recycling batch may mix central-office switching boards, remote network units and transport equipment. This variation makes careful identification and sampling essential before a plant commits to a particular recovery route.
The valuable material is frequently distributed across many small contacts rather than a single visible deposit. Gold on printed circuit board edge fingers and connector pins is often only micron-scale, with different thicknesses and under-layers. That structure supports a targeted process, but it also makes sorting errors significant: residues left with plastic can depress yield, while unnecessary board mass can increase reagent, energy and handling costs.
Australia’s completed 3G shutdowns and continuing fibre upgrades have added retired radio, transmission and switching hardware to the national waste stream. The resulting equipment is bulky, but concentrated connector streams can be generated efficiently at licensed dismantling facilities. Separating those streams early makes downstream ALS2 capacity easier to design and fill.
How ALS2 separates connector gold
The essential first step is feed preparation. Suitable boards and modules are identified, depopulated where practical, reduced to a controlled size and passed through liberation steps that release connectors from laminate, solder and steel. The aim is a clean, metal-rich fraction with predictable composition, not maximum shredding.
Reliable recognition of connector-rich material can determine whether a batch reaches the separation stage economically. Work on a custom vision algorithm has explored how camera-based classification can support that selection by distinguishing usable contacts from lower-value board material. Such tools would complement density, magnetic and size separation rather than replace laboratory assay.
ALS2 then separates the liberated precious-metal-bearing material without relying on bulk acid digestion. The exact unit sequence depends on the selected plant configuration, but the process is intended to recover gold while reducing corrosive acid demand and the associated neutralisation burden. Residual liquids, filter residues and off-spec fractions still require controlled handling, so acidless does not mean impact-free.
Designing a reliable recovery flow
A bankable plant begins with representative sampling, not a visual estimate of plating. Operators should establish gold and other valuable-metal grades across connector types, locations and board vintages. Analytical duplicates help reveal whether a batch is homogeneous enough for a fixed recipe or needs blending before treatment.
Feed preparation then protects both recovery and equipment. Connector liberation should remove plastic and solder residues, while screens and air classification can prevent oversized fragments from disrupting downstream separation. A modest metal detector or optical sorter may add value where manually captured connector streams still contain copper-heavy assemblies.
Recovered output should be treated as a measurable concentrate until its composition is known. Sampling, mass balancing and independent assay establish actual recovery and determine whether further refining is required. Operators should not equate the presence of gold in a product with immediately saleable bullion, particularly when palladium, nickel, tin or copper remain.
Fitting Australian operations
Sydney, Melbourne and Brisbane contain large concentrations of network infrastructure, corporate equipment and data-centre hardware that can support centralised recovery. Their proximity to specialist dismantlers, laboratories and metal markets lowers transport costs. A compact ALS2 module could then operate near the WEEE stream instead of shipping low-value boards across the country.
Regional collection is a different commercial challenge. Boards may arrive through municipal e-waste programs or from mines, utilities and remote communications providers across Western Australia, Queensland and the Northern Territory. Containers of dense connectors can travel economically, while mixed unsorted circuit boards attract freight charges and offer less certainty about feed value.
Imported used boards also require careful border planning. Any commercial importer should confirm customs classification, biosecurity requirements and waste-transfer treatment with Australian Border Force before shipment. Electronics can be subject to inspection and clean-and-repair requirements, and boards sourced from overseas may carry contamination or documentation risks.
Across Australia, e-waste obligations vary by state and territory. NSW, Victoria and Queensland each use different licensing, reporting and producer-responsibility arrangements, so a recovery plant must work with the relevant regulator rather than assume one national permit. Gold’s inclusion on Australia’s Critical Minerals List also strengthens the policy case for domestic urban mining, although commercial decisions still depend on AUD-denominated returns.
Safety, quality and project evidence
Acidless operation can reduce the need for bulk corrosive acids, but safety still depends on the actual chemistry and machinery installed. The plant design should address dust, noise, electrical hazards, moving parts, liquids and any residual reagent exposure. Operators should also identify where wash water and process residues will be stored, sampled and transported.
Quality assurance is equally important. XRF can assist with rapid material sorting, but it should not replace robust precious-metal assay when settling value or demonstrating recovery. Batches should move through documented sampling points, with reconciled feed, product and residue masses. Chain-of-custody records make the output more credible to refiners and bullion intermediaries in Australia.
ALS2Project’s development has been supported by the European Union’s Horizon 2020 research and innovation programme. That backing provides a European research and innovation framework for the project and supports continued technical development across the circular-economy value chain. It does not replace Australian regulatory approval, site-specific engineering or commercial validation, which remain necessary before a plant can process local telecom residues.
Comparing routes and planning a local trial
The right comparison begins with feed quality and end product. Acid-based hydrometallurgy is widely understood, while thermal treatment can accept broader mixed-metal feeds; both have established infrastructure and distinct environmental burdens. ALS2 is aimed at a narrower connector-rich stream, so its advantage is best assessed through measured recovery, lower chemical handling and modular deployment.
The comparison below outlines the operational differences that matter most to an Australian project.
| Route | Feed handling | Chemical and waste profile | Deployment considerations |
|---|---|---|---|
| Acid-based hydrometallurgy | Bulk board reduction followed by leaching and solution refining | Uses corrosive acids and produces neutralisation salts and liquid effluent | Established refining network, with stronger containment, water and treatment requirements |
| Pyrometallurgy | Smelting of mixed board or metal concentrates | High heat demand and off-gas treatment; broad metal recovery pathway | Best suited to larger mixed streams and centralised metallurgical facilities |
| ALS2 acidless separation | Connector liberation and targeted separation of precious-metal-bearing material | Designed to avoid bulk acid digestion and reduce corrosive reagent demand | Compact modular installation for segregated WEEE streams; non-hazardous residues still need management |
For Australian telecom-board residues, segregation is the decisive first step. A dedicated connector stream may make a smaller ALS2 plant more consistent than a system receiving heterogeneous whole-board loads. Final selection should use an actual assay-based mass balance, site utility requirements and a licensed waste-management plan rather than technology labels alone.
The immediate action for Australian recyclers, telecom operators and e-waste organisations is to define a representative connector-rich sample. Ask Ikoi S.p.A. to review its composition through the ALS2Project site, establish the appropriate test work and scope a controlled pilot with a local licensed processor.
Take that pilot from sorting through final assay, documenting yield, residues, operating requirements and verified cost. The result will give buyers, regulators and financiers an Australian performance baseline and a clear route to scale.