Silicon removal from cast aluminum scrap using an isothermal compression technique
✍ Scribed by A.T. Ali; N.M. Stubina; J.M. Toguri
- Publisher
- Elsevier Science
- Year
- 1989
- Tongue
- English
- Weight
- 592 KB
- Volume
- 2
- Category
- Article
- ISSN
- 0921-3449
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✦ Synopsis
The refining of hypoeutectic aluminum-silicon alloys by fractional solidification of the melt was investigated. The best refinement obtained was a reduction from 4.7 to 0.9 mass percent silicon.
The degree of refining was always less than that predicted from theory. This can be attributed to two factors: entrapment of interdendritic liquid in the "cake", which lowers the efficiency of the process, and the presence of iron in the sample which raises the observed refining ratio.
It was found that low solid fractions result in better refinement. A compromise must be made, therefore, between the purity of the product and the yield.