How much gold from pc boards can a typical recycling plant recover per day

If you are sizing up an e-waste business, the first question on your list is usually a money question: how much gold can one of these plants actually pull off a pile of scrap boards in a day? The honest answer is that a typical circuit board recycling plant processing anywhere from one tonne to more than a dozen tonnes of printed circuit boards per shift can recover from a few hundred grams up to roughly two kilograms of gold on a normal working day. The gap is wide, and almost none of it comes from the machine. It comes from the boards you feed it, how well you sort them, and how cleanly your separation line captures the metal. This article walks you through the calculation so you can estimate your own daily yield before you commit to equipment.

Electronic waste is already the fastest-growing waste stream on the planet. Roughly 62 million tonnes were generated in a single recent year, and barely more than a fifth of it was formally recycled. Circuit boards sit at the heart of that stream because they concentrate value: a tonne of good-quality motherboards can hold several times more gold than a tonne of freshly mined ore, sitting alongside copper, silver and palladium. That concentration is the entire business case for the industry. But notice the phrase "good-quality." Gold is not spread evenly across a board. It gathers where dependable electrical contact matters most - in the plated edge fingers of slots and connectors, in relay pins, in socket terminals and in the bonding pads of high-reliability boards. Those features measure only a few microns of plating, so recycling a board is really a race to liberate that thin surface metal, plus the copper underneath it, from the fiberglass and resin that trap them.

Most plants do not leach gold on site at all. The practical first stage is mechanical. The circuit board recycling equipment crushes and grinds the boards down, then uses dry separators or wet metal separators, vibrating screens, electrostatic separators and cyclone collectors to isolate every component of the feed: copper powder, non-metallic powder, and the small dusts in between. The gold mostly travels with the copper fraction, so the richness of your copper concentrate is effectively the purity of your gold capture as well. A well-designed separation train typically keeps both metals clean, with copper powder purities of 96 to 98 percent and recovery rates at or above 95 percent. That concentrated fraction then goes to a refiner, which extracts the gold and returns it as nearly pure metal.

Let us put numbers on it so you can copy the method for your own case. Take a mid-size plant running about 2000 kg/hour, such as a circuit board recycling plant with dry separator, on a single eight-hour shift. In a day that line moves roughly 8 to 16 tonnes of boards, depending on how continuously it is fed. Suppose the scrap grades at 0.1 to 0.4 grams of gold per kilogram of board, which is a typical working range for mixed computer boards. That means 100 to 400 grams of theoretical gold per tonne. No process is loss-free. Between mechanical separation and downstream refining, a net yield of 70 to 80 percent of the theoretical content is a reasonable benchmark for a well-run plant. That leaves roughly 80 to 300 grams of saleable gold per tonne of input. Multiply across the day's 8 to 16 tonnes and a single shift lands somewhere around 0.6 to 2.4 kilograms of gold - in the order of 20 to 80 troy ounces - every working day. Run a second shift and the daily figure roughly doubles.

Be clear-eyed about the economics before you get excited by the gold alone. In practice copper is the workhorse of the revenue, often contributing the majority of a recycler's income, while gold, palladium and silver fill in the rest. A plant built solely around gold will struggle. The dry process equipment that delivers a clean, high-purity copper fraction - where the gold rides along and gets captured rather than lost - matters just as much as the refining step that comes after.

Whatever throughput a spec sheet promises, your actual daily gold comes down to four things you control: the grade of the PCB scrap you buy, how consistently you sort it, the recovery efficiency of your separation line, and how you split mechanical recovery from chemical refining. The single biggest lever is feedstock. Switch from high-grade server and telecom boards - the densest, most gold-rich material available - down to modern, thinly plated consumer boards, and the daily gold can fall by an order of magnitude even on identical machinery. Sorting pays for itself many times over before it ever reaches the shredder.

Is the daily gold figure the same for every type of board? No. Server and telecom boards carry the densest plating and yield the highest grams per tonne. Pre-2010 desktop and laptop boards sit in the middle. Modern consumer electronics carry far less gold per tonne because plating has grown thinner and some gold has been replaced by other alloys.

Do I need to run a chemical plant just to recover gold? Not usually. Most operators concentrate the metals mechanically into a salable fraction and send that enriched material to a smelter or refiner. The big value in owning the line is producing a clean, high-purity concentrate rather than trying to do the final extraction yourself.

What capacity should I choose? Match the line to the volume of scrap you can actually secure at a steady grade. Dry-separation plants scale from compact models handling a few hundred kilograms per hour up to 2000 kg/hour and beyond, and a machine working a full shift converts directly into the tonnes-per-day figure in the calculation above.

Gold recovery from circuit boards is a real business, but it rewards honest expectations. Treat the daily yield as a range shaped by your feed, your sorting and your separation line, not as a fixed number. Build the recovery around copper as the paying metal and gold as the bonus. San Lan Technologies builds circuit board recycling equipment and complete plants from compact dry-separation models up to 2000 kg/hour lines with wet or dry separation, and supports projects from first feed to full international operation. If you want to estimate your own daily gold with real numbers, running even a few hundred kilograms of your actual boards through a small line as a trial will tell you far more than any generic figure on a page.