Adhesive recovery equipment being developed by GIS: a gravity-fed stack of coated, perforated decks designed to capture the fine gold that conventional sluices wash away — with no mercury, no fuel and no moving parts.
The current engineering design. Toggle parts on the left, or use the cutaway to look inside the deck stack.
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Sluice tailings are screened first, so only fine material and water enter the tower.
The slurry flows by gravity down through a stack of perforated decks. Alternating hole patterns spread the stream so it contacts every deck on the way down.
Dense gold grains settle onto the adhesive-coated deck surfaces and hold there, while lighter sand and water wash through.
At the end of a run the decks are lifted out and the captured material is recovered. Decks are re-coated and go straight back into service.
Designed to capture fine gold without mercury or cyanide — a clean alternative for recovering what a sluice run leaves behind.
The tower works on gravity alone. No engine, no fuel, nothing to wear out or service in the field.
Standard sheet metal, threaded rod and off-the-shelf fasteners. One identical deck plate is the only repeated part — buildable and repairable anywhere in the interior.
Deck count scales with throughput. The same plate stacks into a small test rig or a full production tower.
The recovery tower is in engineering development — design and bench testing. It is not yet commercially available, and the 3D model above shows the current prototype design, which will keep evolving. As development continues we plan to run supervised field trials with operating mines in Guyana.