Background and aims of the project

Within the scope of this project, an economic process is to be developed with which valuable metals (e.g. Cu, Au, Ag and Al, associated with other heavy metals) can be separated as far as possible from the fine fraction of waste incineration slag (MV slag: < 3mm), of which about 1.5 million t are produced annually in Germany, in a combination of different processing techniques and returned to the material cycle.

However, the economic viability of such a process is only given if the mineral residual fraction, which subsequently exists in finely ground form and makes up the majority of the material, can be put to high-quality use as an alternative raw material within the framework of open-loop recycling. 

Consequently, the most important goal of the project is to present the finely ground mineral fraction so cleanly that it meets the qualitative requirements of the cement industry in order to be able to be used as a raw material component in clinker production. At the same time, this has the advantage that less CO2 is released during deacidification in the cement plant compared to natural resources. As a result, MV slag would be a permanent source of raw materials for the cement industry in the future, which would contribute significantly to a sustainable increase in raw material productivity and to the conservation of natural resources and landfill areas. VDZ is responsible for sub-project 8 (scientific monitoring and mineral analysis) in the project.


The project is funded by the Federal Ministry of Education and Research (BMBF) through the FONA platform for research for sustainability.

Person to contact

Do you have any questions on this subject?

Dr Stefan Seemann
Environment and Plant technology

+49-211-45 78-254

Other items of possible interest


Research projects

Development of a process for recycling waste incinerator slag as a raw material component in cement production

[The project description and the results are only available in German.]

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