Granulator copper, often called copper rice or copper granules, is the clean, high-purity copper particles recovered from waste printed circuit boards (PCBs) through mechanical recycling. Every electronic device we use, from smartphones to industrial control panels, relies on circuit boards that carry copper in their conductive traces, solder pads, and plated holes. When those devices reach the end of their life, the copper they contain does not have to end up in a landfill. With the right circuit board recycling equipment, scrap PCBs can be turned into a clean, saleable copper product that goes straight back into the supply chain.
This article explains what granulator copper is, why circuit boards are such a valuable source of it, and how the production process works from start to finish.
What is granulator copper?
Granulator copper is the term used for the small, uniform copper particles produced when circuit boards are crushed and separated by a granulator. Depending on the process and the machine, the final product can range from fine copper powder to small granular "rice" that is clean enough to sell directly to smelters, powder metallurgy plants, and metal traders.
The key point is that this copper is recovered without chemicals. Instead of using acids or burning to strip metal from the boards, a granulator physically breaks the board apart and then separates the copper from the plastic and fiberglass by mechanical means. The result is a metal product that keeps its value, because it is clean, dry, and free of contamination.
Why circuit boards are a rich source of copper
A printed circuit board is essentially a sandwich of copper foil and insulating material. Copper is used to form the tracks that connect every component, and it is one of the most abundant metals in a typical board. When large volumes of e-waste are processed, the copper recovered from PCBs quickly adds up to a significant quantity of metal.
Recycling this copper makes sense both economically and environmentally. Mining new copper consumes energy and disturbs land, while a circuit board recycling plant recovers metal that is already refined. For a recycling business, the copper powder and granules produced from PCBs are usually the most valuable output of the whole plant, so getting the separation right directly affects the bottom line.
How granulator copper is produced from circuit boards
Producing granulator copper from circuit boards follows a clear sequence of mechanical steps. A complete plant combines several machines, each with a specific job, and the process can be divided into five stages.
Step 1: Pre-shredding
Whole circuit boards are too large and too rigid to feed directly into a granulator, and they often carry components such as capacitors, connectors, and chips. The first step is to break the boards down into smaller pieces using a shredder. A two-shaft or four-shaft shredder chews the boards into pieces of a few centimeters, which makes the material much easier to handle and prepares it for the next stage.
Step 2: Granulation
The shredded pieces are then fed into a granulator, the heart of the whole process. Inside the granulator, high-speed rotating blades chop the material into fine particles of a few millimeters. A built-in screen controls the particle size, so the output is uniform. This consistency matters because even, well-liberated particles are much easier to separate in the next stage. The granulator is where the copper becomes "liberated" from the plastic and fiberglass, which is exactly what makes the metal recoverable.
Step 3: Separation
After granulation, the material is a mixture of copper particles, plastic, and fiberglass dust. The separator now sorts these by density and other physical properties. In a dry process, an air separator blows air through the mixture: the lighter plastic and fiberglass are carried away into a collection bin, while the heavier copper falls straight down. An electrostatic separator can then pick out any remaining non-ferrous metal from the plastic, and a magnetic separator removes any steel that may have entered with the feed. This is how a circuit board recycling plant with dry separator 500-2000kg/hour capacity produces clean copper without using a single ｄｒｏｐ of water.
Step 4: Wet separation (optional)
Some plants use a wet process instead of, or in addition to, dry separation. In wet separation, the granulated material is passed through water, where the dense copper sinks and the lighter materials float. Wet systems are especially effective for very fine material and for boards that are difficult to separate by air alone. They do require water treatment and a drying step, which is why many operators choose dry separation for its simplicity and lower running cost.
Step 5: Collecting the final product
At the end of the line, the operator is left with three clean streams: copper granules or powder, plastic, and a small amount of inert fiberglass waste. With well-tuned equipment, the copper powder can reach a purity of 96-98%, with a recovery rate around 95%. The plastic can be sold to plastic recyclers, and even the fiberglass waste can be handled responsibly, so very little of the original board ends up in landfill.
What granulator copper is used for
Granulator copper is a versatile product. Copper powder and granules are bought by smelters and foundries to be melted into new copper products, by powder metallurgy companies for making sintered parts, and by traders who supply the metal to manufacturers. Because the copper is clean and free of contamination, it commands a better price than mixed or dirty scrap, which is one of the main reasons recyclers invest in proper separation equipment.
Choosing the right equipment
The right setup depends on the volume of boards you plan to process and the quality of copper you want to produce. Small operations might start with a compact line handling 300-500 kg per hour, while larger recyclers can run plants processing 1000 kg or 2000 kg per hour, with some systems designed up to 5000 kg per hour. Whether you need a dry process for simplicity or a wet process for fine material, the key is to match the machine to your feed material and your target output.
San Lan Technologies Co., Ltd is a professional manufacturer of e-waste recycling machinery with over 15 years of experience in the field. The company designs and builds complete circuit board recycling plants, cable recycling machines, and other e-waste processing lines, and it supports customers from planning and installation through to commissioning. If you are considering a circuit board recycling plant, the company can help you ｓｅｌｅｃｔ the right compact granulator with dry separator equipment and configure a full line to match your capacity and budget.
Conclusion
Granulator copper is simply the valuable copper that is recovered from waste circuit boards by mechanical crushing and separation. The process is clean, chemical-free, and profitable: pre-shred the boards, granulate them into fine particles, separate the copper from the plastic, and collect a high-purity copper product that is ready to sell. With the right circuit board recycling equipment, a recycling business can turn a growing waste stream into a steady source of income while keeping valuable metal out of the landfill.
