Recovery and valorisation

Industrial excellence in the service of sustainability

Our business model is fully aligned with the principles of the circular economy, providing a concrete and strategic response to the growing need for sustainability in industrial processes.

In just 25 years, Stemin has established itself as a key player in the European metallurgical sector, thanks to its ability to recover and valorise ferrous and non-ferrous metal materials from both industrial (pre-consumer) and urban (post-consumer) sources, transforming diverse waste streams into high-value secondary raw materials.

Every waste is an opportunity

We harness technology to transform waste into high-quality secondary raw materials, ready to re-enter the production cycle.

Technology, control and a circular vision

Through state-of-the-art facilities and certified production processes, Stemin is able to process metal waste with particle sizes as small as 3 mm, delivering fully traceable outputs that undergo rigorous quality checks and are suitable for further industrial applications.

The company has developed a highly specialised supply chain completely dedicated to processing post-consumer metal materials — a key and growing stream of which is UBCs (Used Beverage Cans).

These materials, often considered low-value waste, are recovered by Stemin through an integrated process that allows for the recovery and requalification of up to 95% of their metal content, returning a resource to industry that fully complies with technical specifications.

The recovery process stages

Stemin’s industrial process is structured in multiple distinct yet synergistic phases, each designed to optimise material separation, purity, and yield.

0

tonnes/year

Input material

1

Shredding

The input materials are reduced in size using a hammer mill shredder, allowing for initial mechanical separation and preparation for the volumetric treatment phase.

2

Volume reduction

Using three-stage presses and shears, the material is compacted to facilitate storage and handling in the subsequent processing stages.

3

Granulation

The material is reduced to a fine particle size using blade granulators, transforming it into fractions optimised for physical separation.

4

Metal separation

Metals are separated from inert materials using eddy current separators, which exploit the different electrical conductivity of the materials.

5

Refining via atomic absorption

Advanced atomic absorption spectrometry technologies enable the precise identification and separation of residual metals, ensuring high quality standards.

6

Alloy separation using LIBS

LIBS (Laser-Induced Breakdown Spectroscopy) technology enables precise identification of different alloys, supporting the broader use of recycled aluminium in high-quality applications maximising its value.

7

Output

Secondary raw material compliant with UNI standards, ready for market distribution and internal use within the Group.

Certified commitment: quality and compliance at the heart of our processes

Every phase of the process undergoes rigorous analytical controls, from the inspection of incoming materials to the certification of the finished product. Our quality system is supported by state-of-the-art laboratory equipment, enabling continuous monitoring of critical parameters.

The entire production process is carried out in full compliance with applicable UNI standards, ensuring adherence to relevant technical specifications. At the end of processing, each batch is issued a certificate of conformity in accordance with EU Regulations No. 715/2013 and No. 333/2011 333/2011, ensuring full traceability and alignment with the quality requirements of the most demanding clients.

The industry driving the ecological transition

Through an industrial model based on technological innovation, certified quality and environmental responsibility, Stemin gives new life to metal waste, making a tangible contribution to the ecological transition and positioning itself as a trusted partner in the sector.

Contact us to learn more about our ability to turn every scrap into value.

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