Recovering gold from waste circuit boards is one of the most attractive ways to turn electronic scrap into real value. A typical ton of PCBs can carry far more gold than the same weight of raw ore, which is why recyclers keep asking the same practical question: what equipment is needed to remove gold from circuit boards? The answer depends on the route you choose and the tonnage you plan to process, but the core machines remain the same across most setups.
This guide walks through each piece of equipment in a typical PCB gold recovery line, explains how the machines work together, and points out the features worth checking before you buy a circuit board recycling plant.
Why the mechanical route is the practical starting point
There are two mainstream ways to get gold off printed circuit boards. The chemical route strips gold with acids and reducers, and it works well on gold-plated pins and fingers at small scale. The mechanical route, by contrast, crushes, grinds and separates the boards so that the metal fraction (gold, copper, silver and palladium) is concentrated without any chemical bath. The mechanical route is what industrial recyclers install, because it is safer to operate, easier to comply with environmental rules, and easier to scale.
Before buying anything, set your daily output. That number decides the size of every machine downstream, from the shredder to the separator. San Lan's circuit board recycling equipment covers capacities from about 300 kg/hour up to 2000 kg/hour, so the plant is chosen to match your scrap supply rather than the other way around.
The equipment list, step by step
1. Pre-chopper and shredder
Whole motherboards are too large for direct grinding, so they are first reduced in a low-speed, high-torque shredder. A 4 shaft shredder is a common choice here because its four interlocking shafts pull boards in without jamming on connectors and stiff corners. Multi-purpose shredders in this range handle roughly 2-3 tonnes per hour and also give you the option to reuse them for cable, batteries or other e-waste later.
2. Secondary crusher and fine grinding
After shredding, the material is still too coarse for clean separation. A hammer crusher or a fine grinding mill brings the particles down to the millimetre level so that the metal is fully liberated from the fibreglass and resin. This liberation step is what makes the downstream separators work; if the grinding is incomplete, metal stays locked inside the resin and is lost.
3. Separation system
Now the freed metal powder has to be pulled out of the non-metallic dust. Two configurations dominate the market. In dry processing, air separators, vibrating screens and electrostatic separators divide metals from plastics; this route needs a robust dust collector to keep the workshop clean. In wet processing, water carries the light fraction away while heavy metals settle, which is gentle on fine gold particles and needs a water recycling loop. San Lan builds both, with options such as the dry-separator plants and the wet metal-separator plants, and each model lists its recovery rate and metal concentrate purity up front.
4. Dust collection and air pollution control
Grey dust from dry lines is not just a health issue, it is lost value you are breathing into the air. A pulse-jet bag dust collector captures the fine fraction, and many integrated plants add cyclone separators upstream of the bag filter so that heavier particles are recovered first. If you add a furnace, the melting step generates fumes, so budget for an air pollution control system to keep the site compliant.
5. Smelting furnace (optional but worth planning for)
The concentrate you produce is a gold-copper powder, not pure gold. To turn it into a saleable ingot you need a furnace. A medium frequency induction furnace melts the recovered metals into an ingot and is offered in sizes from a compact 15 kW lab unit up to a 160 kW model that melts around 100 kg of ferrous scrap or 250 kg of copper per batch. If sending concentrate to a refiner is not an option in your region, adding a furnace early keeps your options open.
Bringing it together in a turnkey plant
Rather than buying components one by one, most operators buy a matched line so the feeders, crushers, separators and collectors are sized for each other. San Lan supplies complete circuit board recycling solutions, custom-machines them to your feed material, and handles installation and commissioning on site. Their technical team has over 15 years of e-waste machine experience, which matters when your scrap mix, and your plant specification, needs to change over time.
Start with a clear question: what does your PCB scrap look like, and how much of it arrives every week? Answer that and the equipment list above becomes a simple sizing exercise. With the right shredder, grinder, separator and furnace matched to your throughput, removing gold from circuit boards stops being a chemistry experiment and becomes a steady, repeatable profit centre.
If you would like a recommendation on the right circuit board recycling plant for your volume, contact the San Lan team with your scrap details and daily target, and they will help you size each stage of the line.
