Fachgebiet Kreislaufwirtschaft und Recyclingtechnologie

5 Items

Recent Submissions
Potentials and Barriers for Tantalum Recovery from Waste Electric and Electronic Equipment

Ueberschaar, Maximilian ; Jalalpoor, Daniel Dariusch ; Korf, Nathalie ; Rotter, Vera Susanne (2017)

Circular economy approaches aim to close material cycles along the value chain. As such, the circular economy can be a long-term strategy to mitigate the risks of critical raw material (CRM) supply. Tantalum, with a current end-of-life recycling rate of less than 1%, has been intermittently discussed as critical. Even though the specificity of tantalum applications and high-mass fractions of ta...

Enabling the recycling of rare earth elements through product design and trend analyses of hard disk drives

Ueberschaar, Maximilian ; Rotter, Vera Susanne (2015)

Hard disk drives consist of a complex mix of various materials. While Aluminum, Copper and Steel are easy to separate, actual recycling processes dilute containing rare earth elements to non-recoverable grades in other material streams. To enable future recycling of these materials an in-depth analysis of hard disk drives from Desktop PCs and Notebooks was carried out. Furthermore, possible rec...

Challenges for critical raw material recovery from WEEE

Ueberschaar, Maximilian ; Otto, Sarah Julie ; Rotter, Vera Susanne (2017)

Gallium and gallium compounds are more frequently used in future oriented technologies such as photovoltaics, light diodes and semiconductor technology. In the long term the supply risk is estimated to be critical. Germany is one of the major primary gallium producer, recycler of gallium from new scrap and GaAs wafer producer. Therefore, new concepts for a resource saving handling of gallium an...

Assessment of element-specific recycling efficiency in WEEE pre-processing

Ueberschaar, Maximilian ; Geiping, Julia ; Zamzow, Malte ; Flamme, Sabine ; Rotter, Vera Susanne (2017)

Pre-processing is a crucial step to ensure the efficiency of subsequent processes and the quality of recyclates. The efficiency of pre-processing can be affected by high losses to undesignated output fractions. Standard batch tests usually provide mass balances and are a good proxy for bulk materials balances (iron/steel, aluminum, plastics). This article aims at harmonizing methodologies and ...

Potential and recycling strategies for LCD panels from WEEE

Ueberschaar, Maximilian ; Schlummer, Martin ; Jalalpoor, Daniel ; Kaup, Nora ; Rotter, Vera Susanne (2017)

Indium is one of the strategically important materials, which have been characterized as critical by various industrialized countries. Despite its high relevance, only low recycling rates are realized. Its main application is in indium tin oxide (ITO), which is used in the production of liquid crystal displays (LCD). However, recovery strategies for indium from LCDs are not yet being implemente...