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The aim of this project was to develop a process for decontamination of aluminium and copper scrap by melting, similar to that which has been used successfully for ferrous scrap for several years. Decontamination by melting aimed to reduce the scrap volume, concentrate contamination in the slag and distribute the remaining activity evenly in the molten material. This in turn allowed a representative activity determination by sampling. Free release of the copper and aluminium for industrial reuse was the ultimate target. A specific problem of this decontamination by melting was the organic coverings of the various copper waste materials. Suitable measures for the separation of these materials from the copper thus had to be found. For the decontamination of aluminium scrap by melting, the salt melt technique had to be investigated. Based on the laboratory tests for the determination of optimum conditions, large-scale tests were carried out. These tests showed that, in spite of certain problems caused by remainders of the insulation material, melting of contaminated copper on a technical scale is feasible, and free release of the copper was achieved. With aluminium, a recycling rate of 75 % for industrial use was realised.

Additional information

Authors: BEYER H, Siemens AG, Bereich Energieerzeugung, Offenbach (DE);HAAS E W, Siemens AG, Bereich Energieerzeugung, Offenbach (DE);GRÄBENER K H, Siemens AG, Bereich Energieerzeugung, Offenbach (DE);BOSSE H, Siempelkamp Gießerei GmbH, Krefeld (DE)
Bibliographic Reference: EUR 16512 DE (1995) 95 pp., FS, ECU 11.50
Availability: (2)
ISBN: ISBN 92-827-4637-2
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