Aluminum Scrap Recycling Without Melting

  • K. Pantke
  • V. Güley
  • D. Biermann
  • A. E. Tekkaya
Conference paper


Aluminum is one of the promising lightweight materials of the twenty-first century. Due to its good machinability, surface properties and a low density, it is often used in production of aircrafts, automobiles, transport systems and consumer products. But one of the greatest disadvantages of this material is the high energy requirement for the primary raw material production, from bauxite to Aluminum ingots. This melting process requires almost 25 times more energy than that needed for the primary steel production. Furthermore the aluminum recycling process needs as much energy as required for the primary steel production. In order to develop an energy-efficient process chain for aluminum recycling, this paper presents a method to recycle aluminum scrap of AA-7175 and AA-7475 alloys directly by a hot extrusion process without an energy intensive re-melting process. The aluminum scrap is in a first step characterized, compacted to billets and finally extruded to new profiles without melting. In this investigation, the scrap material as well as the extruded profiles is characterized by their microhardness. The final profiles from scrap are compared with regard to their strength with conventional profiles by carrying out tensile tests.


Chip Form Extrusion Process Extrusion Press Aluminum Scrap Extrude Profile 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



The authors would grateful like to acknowledge the financial support of the DFG (German Research Foundation).


  1. 1.
    Sharma, C., Nakagawa, T.: Recent development in the recycling of machining swarfs by sintering and powder forging. Annals of the CIRP, 1977, 25(1).Google Scholar
  2. 2.
    Valberg, H.: Extrusion welding in aluminum extrusion, Int. J. of Materials and Product Technology, 2002, 17(7), 497–556.CrossRefGoogle Scholar
  3. 3.
    Gronostajski, J., Marciniak, H., Matuszak, A.: Production of Composites on the base of AlCu4 Alloy Chips. J. Mat. Proc. Tech., 1996, 60, 719–722.CrossRefGoogle Scholar
  4. 4.
    Fogagnolo, J., Ruiz-Navas, E., Simon, M., Martinez, M.: Recycling of aluminum alloy and aluminum matrix composite chips by pressing and hot deformation. J. Mat. Proc. Tech. 2003, 143–144.Google Scholar
  5. 5.
    Allwood, J.M., Huang, Y., Barlow, C.Y.: Recycling scrap aluminum by cold-bonding. Proceeding of the 8th ICTP, Verona (2005).Google Scholar
  6. 6.
    M. Schikorra, K. Pantke, A.E. Tekkaya, D. Biermann: Re-Use of AA6060, AA6082, and AA7075 Aluminum Turning Chips by Hot Extrusion, Proceedings of the ICTP-2008, Korea (2008).Google Scholar
  7. 7.
    A.E. Tekkaya, M. Schikorra, D. Becker, D. Biermann, N. Hammer, K. Pantke: Hot Profile Extrusion of AA-6060 Aluminum Chips, Journal of Materials Processing Technology, 209, pp. 3343–3350 (2009).CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • K. Pantke
    • V. Güley
      • 1
    • D. Biermann
      • 1
    • A. E. Tekkaya
      • 2
    1. 1.Institute of Machining Technology (ISF)TU DortmundDortmundGermany
    2. 2.Institute of Forming Technology and Lightweight Construction (IUL)Technische Universität DortmundDortmundGermany

    Personalised recommendations