WEEE recycling process chapters

WEEE waste recycling technological process

The e-waste recycling process, known as WEEE recycling, involves several key steps to ensure efficient and responsible management of electronic devices. Here are the main steps of this process, according to available sources:

WEEE Waste Collection and Storage

Collection: Electronic waste is collected through designated collection centers, return programs, collection locations or collection services on request. It is important that WEEE electronic waste is collected separately from general waste to prevent contamination and facilitate further recycling.
Storage: WEEE waste collected is transported to recycling plants, where it is stored safely, especially if they contain hazardous substances, such as Li-Ion batteries that require another special recycling process, being assimilated to hazardous waste.

Sorting, disassembling and shredding

sorting: After collection, electronic waste is manually sorted to extract specific components such as batteries, bulbs, LCD screens, which require a separate recycling process. The correct sorting is very important for the next WEEE recycling steps.
Dismantling: Electronic devices are dismantled to separate various components, such as boards containing circuits, cables and other valuable parts. This process can be done manually or automated.
Shrinking: The disassembled components are shredded into small pieces to facilitate the precise separation of materials. The initial shredding reduces the size of items to about 100 mm, and a subsequent shredding can reduce the size to about 10 mm.

Mechanical separation

Magnetic separation: Shredded waste is passed under a strong magnet to extract ferrous metals such as iron and steel. Magnetic separation is effective for separating embedded metals in plastic and circuit boards.
Eddy Current Separation: Non-ferrous metals such as aluminum and copper are separated using eddy currents. This process uses a magnetic field to repel non-ferrous metals from the waste stream.
Water separation: After the separation of the metals, the rest of the waste, which is mainly plastic and glass, is separated using water. Water helps separate the plastic from the glass and purifies the plastic to separate the different types of polymers.

Material recovery

Precious metal recovery: Precious metals such as gold, silver and palladium are extracted from circuit boards and other components. These metals can be reused in the manufacture of new electronic devices.
Recovery of non-metallic materials: Plastics, glass and other non-metallic materials are ready for reuse or sale. These materials can be directed to other recycling streams or processed on the spot and sold directly.

Responsible disposal of non-recyclable materials

Disposal of hazardous materials: Materials that cannot be recycled or containing hazardous substances are disposed of responsibly to prevent environmental pollution. This process involves the use of hazardous waste recycling lines that use special methods that do not harm the environment or human health.

Concrete examples from the recycling industry

Li-ion Battery Recycling: The process of recycling lithium-ion batteries involves shredding battery modules in an inert atmosphere, retrieval of electrolytes using vacuum drying technology and mechanical separation to recover black mass and non-ferrous metals.
Recycling of printed circuit boards: The printed circuit boards are shredded and passed through a mechanical and chemical separation process to extract precious metals and other valuable materials.

WEEE recycling lines (electrical and electronic equipment waste)

Recycling lines dedicated to WEEE electronic waste processing, including R2 and R4, as well as small and large household electronics, such as washing machines and dishwashers, are integrated solutions for the efficient management of these types of waste. They contribute to environmental protection through responsible recycling, but also optimize the recovery of valuable materials.

Electronics, choppers and refiners are designed to crush and break down waste into high-quality materials when exiting the recycling line. The result is a processed product that is ideal to be inserted into granulation lines for non-ferrous components such as plastics and non-ferrous metals, or it can be sent directly to melting furnaces for processing ferrous components.

The implementation of these advanced technologies in WEEE processing facilities not only increases the efficiency of recycling, but also ensures a detailed separation of different types of materials, which maximizes the utilization of each electronic component. Thus, facilities with a high degree of technology and automation for the processing of electronic waste become an essential element in promoting a sustainable circular economy.