When maximum copper purity matters more than operational simplicity, a wet copper wire granulator is the right choice. The wet type process adds water spraying at the gravity separation stage, removing the residual dust and fine PVC particles that remain attached to the copper granules in dry processes, and produces copper granules at a purity of about 99.9%, higher than that obtained through dry separation.
A wet copper wire granulator is chosen by operators who supply copper to premium refineries or smelters with strict purity requirements, where every tenth of a percent means a different price level. The trade-off compared to the dry process is the existence of process wastewater, which requires treatment. See the full range of recycling equipment and where each one fits into the flow.
Key Advantages for Wet Copper-PVC Separation
• Copper purity ~99.9%, produces granules with a higher purity than dry separation, thanks to the water-based removal of fine PVC dust.
• Visually cleaner granules, the surface of the copper granules is washed of fine contaminants, an advantage when delivering to smelters that inspect batches visually.
• Suitable for high-value contracts, the purity requirements of premium refineries are better met.
• Water as a purification stage, in some wet type configurations, water replaces the electrostatic separator as the final purification stage.
• PLC control, continuous flow, automatic feeding and re-feeding of insufficiently separated material.
• Compatible with the same feedstock, copper wires and cables with PVC or rubber insulation, as with dry granulators.
• Two products, high-purity copper granules and PVC/rubber granules, both recoverable.
• Configurable throughput, from medium to high capacity, depending on the project.
Technical Specifications, Wet Copper Wire Granulator
| Parameter | Value |
|---|---|
| Process type | Wet (wet type): crushing + gravity separation with water spraying |
| Feedstock | Used copper wires and cables |
| Crushing | Knife crusher for reduction to fine granules |
| Separation | Wet gravity separator with water spraying |
| Recovered products | Copper granules (~99.9%) and PVC/rubber granules |
| Wastewater | Requires a treatment system or internal water recycling |
| Control | PLC, continuous feeding, automatic re-feeding |
| Components | CE-marked where applicable |
| Capacity | Configurable per project |
Wet Type Copper Granulator, When It Is Worth It Compared to the Dry Process
A wet copper wire granulator is not the universal choice; it is the right choice when copper purity is the critical price factor. The dry process produces granules at about 99%, sufficient for standard smelters. A wet granulator raises the purity to about 99.9%, a small numerical jump but a commercially significant one for refineries that pay a price premium for copper with documented purity close to refined copper.
The management of cable waste containing copper falls within the European framework for waste electrical equipment; a wet copper wire granulator delivered in Europe is designed in accordance with the requirements of Directive 2012/19/EU on WEEE. For integration into a complete flow, see also the complete industry solutions.
The trade-off of a wet granulator is the existence of wastewater: the water used in separation becomes loaded with fine PVC particles, dust and traces of grease, and must be treated or recycled internally before discharge. For operators with high-volume, high-purity contracts, the difference in copper price far outweighs this added complexity.
The copper granules produced have their surface washed of fine contaminants: there are no longer any PVC dust or traces of varnish to color or contaminate the surface. Smelters and refineries that inspect batches visually appreciate this surface cleanliness.
For fine magnet wire, with thin enamel coating that disintegrates into particles of tens of microns during crushing, the wet process has a clear advantage: these fine particles are not captured efficiently by dry separators, but are washed and settled out by the water in the wet separator.
The water from the wet separator does not necessarily have to be discharged as wastewater: modern systems recirculate the water through a sedimentation basin and a filter. The accumulated sediment, a paste of PVC and fine impurities, is managed periodically as solid waste, much easier to treat than raw wastewater.
Dry Process vs. Wet Process Comparison
| Criterion | Dry granulator | Wet granulator |
|---|---|---|
| Copper purity | ~99% | ~99.9% |
| Wastewater | No, fully dry process | Yes, requires treatment or recirculation |
| Operational complexity | Simple | Medium (additional water system) |
| Suitable for | Standard smelters, high volume | Premium refineries, strict requirements |
| Granule surface cleanliness | Good | Excellent, washed granules |
| Permitting | Simpler | Requires a wastewater permit |
How It Works
1. The used cables are fed into the knife crusher, which reduces them to small metal and plastic granules.
2. The fine granules pass into the wet gravity separator, where they are sprayed with water.
3. The water washes the fine PVC and dust particles off the copper granules and settles them in the lower basin.
4. The heavier copper granules separate from the PVC granules and are collected separately.
5. Insufficiently separated material is returned automatically for a second pass.
6. The wastewater is directed to the treatment or recirculation system.
A well-tuned wet granulator produces copper granules with documentable purity close to refined copper, a strong selling point in dealing with premium refineries and smelters.
Frequently Asked Questions
How much purer is the recovery compared to a dry granulator?
A dry granulator produces granules at about 99%. A wet granulator with water-spray separation raises the purity to about 99.9%, removing fine PVC particles. The difference can represent a significantly better price on contracts with premium refineries.
What do I do with the wastewater generated?
Modern systems recirculate the water through a sedimentation basin and a filter, reducing the volume of wastewater discharged. The solid sediment is managed periodically as solid waste. If the water is discharged, it requires a treatment system in accordance with local regulations.
For what type of customer is the investment worth it?
For operators who supply premium refineries or producers of high-quality copper semi-finished products, where documented purity at ~99.9% brings a higher price. On volume contracts, the price premium covers the cost of water treatment.
Can it process fine magnet wire with enamel coating?
Yes. Fine wires with enamel coating are a case where the wet process has a clear advantage: the coating, disintegrated into fine particles, is not captured efficiently by dry separators, but is washed and settled out by water.
Why URSTAG?
URSTAG is a premium brand of recycling equipment, with over 15 years of experience. You don't just get a machine, you get a solution engineered by specialists, built from top-tier components and backed by a team that supports you from design through commissioning.
• European engineering, every machine and every complete line is designed by our engineering teams in Europe, with a focus on reliability, safety and energy efficiency.
• Premium components, we build on motors and automation from industry leaders: Siemens, Schneider Electric, ABB, WEG, SEW-Eurodrive, NORD Drivesystems and Bonfiglioli.
• Over 15 years of experience, we know how materials and machines behave in real-world operation, and we configure each solution for your flow and volume.
• New equipment, configured for you, we supply new units, made to order for your application, with complete technical documentation.
• Delivery, installation and training included, we handle transport, commissioning and operator training, with support throughout the equipment's life.
As a premium brand, URSTAG relies on European engineering, top-tier components and experience. You choose a partner that supports your production long term, with equipment built to run reliably in demanding industrial environments.
