Pyrometallurgische Verwertung agglomerierter aluminiumhaltiger Reststoffe minderer Qualität

Translated title of the contribution: Pyrometallurgical recycling of agglomerated aluminium-containing residues with a low quality

Marlis Zöhrer

Research output: ThesisDoctoral Thesis


Nowadays aluminium containing residues with a low quality, for example dusts and sluges, are not recycled due to their phyical porporties. They are deposited despite of their metal contents and the containing valuable metals are lost for further recycling processes. But the demand for the recyling of contaminated and fine grained materials increase due to enviromental reaisons and because of the stratagic dependency on the availability of resources and raw materials. The aim of the research is to treat aluminium containing residuals (e.g. by agglomeration) in a way, in which they can be charged into existing melting processes and the quality requirements of the products can be achieved. The recovery of valuable metals is based on a comprehensive characterization of the physical and pyrophoric properties and the chemical composition. Only the metal and metal alloy fractions in the residues can be economically recycled in contrast to aluminium oxide. Therefore, the precise characterisation of these materials is very important but neither RDX nor XRF gives information about present metallic phases. In this connection, the metal content is determined by a simple experimental setup. The measuring principle based on the formation of hydrogen due to a chemical reaction between the hydrogen ions of the hydrochloric acid and the metal in the residue. Additionally the charging process, depending on the particle size of the metal containing residue, should also be improved. Furthermore, briquetting allows a reduction of generated dust during the transport, storage, manipulation and minimises the risk of dust explosion. For these reasons, agglomeration has a positive effect on the optimisation of the surface in relation to the volume and the suitability as a secondary raw material. The experiments in this thesis demonstrate the feasibility to produce stable briquettes of fine aluminium powdered waste and foils without binding agents using the briquetting press at the testing plant. The pyrometallurgical experiments in laboratory and technical scale show the possibility to recover valuable metals from aluminium containing residues with a low quality, e.g. dusts with a high oxide content. Furthermore, an aluminium and copper containing master alloy is produced of a foil fraction for which no current recovery process is available.
Translated title of the contributionPyrometallurgical recycling of agglomerated aluminium-containing residues with a low quality
Original languageGerman
  • Goldmann, Daniel, Assessor B (external), External person
  • Antrekowitsch, Helmut, Assessor A (internal)
Publication statusPublished - 2017

Bibliographical note

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  • Recycling
  • aluminium
  • agglomeration

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