In aluminum recycling about 4% on average is lost on oxidation and dross. However, large percent of remelt secondary ingots (RSI) produce much more dross after remelting. It is rather surprising that no dross can be detected in the RSI, but after remelting some parts of apparently ‘healthy’ aluminum can give up to 80% of dross. This raises question how dross gets formed. Recent research proposes that the formation of dross after remelting of the RSI is closely related to the solidification process in the ingot, specifically the formation of shrinkage porosity, hydrogen porosity, and hot tearing. Under these circumstances, dross comes from oxidized surfaces of those defects. In this paper, simulations of the RSI cooling down show susceptibility of ingots towards shrinkage porosity and hot tearing, which are in accordance with experimental findings. Simulations also show that dross is more likely to form with increased temperature of the mold and increased thickness of the ingot. The only efficient solution for the problem of dross formation, however, seems to be a change in geometry of the mold.
Skip Nav Destination
ASME 2009 International Manufacturing Science and Engineering Conference
October 4–7, 2009
West Lafayette, Indiana, USA
Conference Sponsors:
- Manufacturing Engineering Division
ISBN:
978-0-7918-4361-1
PROCEEDINGS PAPER
Simulation of Solidification Defects for Prediction of Dross Formation in Aluminum 5182 Remelt Secondary Ingot Available to Purchase
Milan Rakita,
Milan Rakita
Purdue University, West Lafayette, IN
Search for other works by this author on:
Qingyou Han
Qingyou Han
Purdue University, West Lafayette, IN
Search for other works by this author on:
Milan Rakita
Purdue University, West Lafayette, IN
Qingyou Han
Purdue University, West Lafayette, IN
Paper No:
MSEC2009-84160, pp. 365-371; 7 pages
Published Online:
September 20, 2010
Citation
Rakita, M, & Han, Q. "Simulation of Solidification Defects for Prediction of Dross Formation in Aluminum 5182 Remelt Secondary Ingot." Proceedings of the ASME 2009 International Manufacturing Science and Engineering Conference. ASME 2009 International Manufacturing Science and Engineering Conference, Volume 1. West Lafayette, Indiana, USA. October 4–7, 2009. pp. 365-371. ASME. https://doi.org/10.1115/MSEC2009-84160
Download citation file:
29
Views
Related Proceedings Papers
Related Articles
Thermal Plastic-Elastic Analysis in Consideration of Metallurgical Microstructure
J. Manuf. Sci. Eng (February,2004)
Heat Transfer Simulation in the Mold With Generalized Curvilinear Formulation
J. Pressure Vessel Technol (August,2006)
Critical Wavelengths for Gap Nucleation in Solidification— Part I: Theoretical Methodology
J. Appl. Mech (March,2000)
Related Chapters
Solidification in a Casting Mold
Everyday Heat Transfer Problems: Sensitivities to Governing Variables
Numerical Study on Dynamic Charging Performance of Packed Bed Using Spherical Capsules Containing N-Tetradecane
Inaugural US-EU-China Thermophysics Conference-Renewable Energy 2009 (UECTC 2009 Proceedings)
Design of Space Net Capture System and Simulation
International Conference on Mechanical and Electrical Technology, 3rd, (ICMET-China 2011), Volumes 1–3