Executive Board Chairman Roland Harings discusses challenges, approaches, and hard decisions.
A brief overview of our business model, and why recycling is becoming more and more important to us as a driver of earnings.
What recycling raw materials do we use, what innovations are we researching, and what trends benefit us? Three behind-the-scenes reports.
A discussion with Prof. Reuter on why we have to rethink product design and an interview with Ms. von Hahn about how Aurubis helps shape metal recycling from a political angle.
A report on the dialogue between the companies TKF and Aurubis about CO2 emissions, closed loops, and why metals are here to stay.
Research & Development
"Lithium-ion batteries are more electrical scrap than battery"
What will be the scrap of tomorrow? Dr. Marcus Eschen, recycling expert in the Research & Development department, tackles this and other questions. An interview about challenges in recycling, lithium-ion batteries, and why he’s on the lookout for the unusual.
DR. ESCHEN, WHAT DOES THE RECYCLING OF THE FUTURE LOOK LIKE?
Eschen: We’re dealing with more and more complexity, especially in the recycling of electrical scrap, so the number of metals is rising. But because products have to be increasingly efficient, everything’s becoming smaller as well – including the metal components. We’ve experienced this trend for years, and it will continue. As a result, it’s becoming increasingly important to recover even the metals that are only present in small concentrations. Tantalum, a base metal needed for building capacitors, is a good example. Currently, it oxidizes in the recycling process, so it ends up in the slags and we lose it. In a research project, we’re currently working on ways to remove tantalum before the melting process. This could be interesting for other metals such as gallium and indium as well. So innovative solutions are more in demand than ever.
The proportion of plastic in electrical scrap is growing, while the proportion of metal is falling. What does that mean for Aurubis?
Eschen: For one, we have to process larger and larger raw material volumes to recover the same amount of metal. This confronts us with multiple challenges: separating the plastic from the electrical scrap will become more important than it already is. We have to work on the existing systems and improve detection rates.
At the same time, however, there’s the question of: What do we do with all of the plastic? There are plastic recyclers, but not enough of them for the volumes that accumulate in Europe alone. We’re therefore considering what feasible and efficient solutions could look like – in some cases, together with industrial and research partners. One possible idea is to recover oil from the plastic, which could then ideally be used by the chemical industry, for instance.
Everyone’s talking about recycling lithium-ion batteries. Is that a topic for Aurubis as well?
On the topic of Industry 4.0 – what’s going on at Aurubis in this regard?
Can you name an example?
Eschen: Let’s take the example of the anode. To the untrained eye, all anodes might look the same. But that’s not the case! Every anode has an individual fingerprint since hot copper never flows into the anode mold in exactly the same way. We look at the process for anything that’s unusual because we want standardization. Imaging sensors and comparative analytics now give us the chance to understand what makes a good product. By evaluating the sensor readings of thousands of casting steps, we learn more about the different temperature profiles, for example. Only when we know what happens there specifically can we ask ourselves the question: How can we gradually optimize the casting process? These are the details that ultimately lead to noticeable positive impacts when it comes to our throughput.