| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Cast Shop Technology
|
| Presentation Title |
Influence of Cryolite Content on the Thermal Properties and Coalescence Efficiency of NaCl-KCl Salt Flux |
| Author(s) |
Veronica Milani, Alicia Vallejo Olivares, Gabriella Tranell, Giulio Timelli |
| On-Site Speaker (Planned) |
Alicia Vallejo Olivares |
| Abstract Scope |
Salt fluxes with fluoride additions are necessary to treat contaminated or oxidized aluminum scrap. This study aims to investigate the effect of cryolite additions on the thermal properties and the coalescence efficiency of a NaCl-KCl salt flux mixture. Thermodynamic calculations were carried out to examine the phase diagram of the salt mixture as the cryolite content increases. The study of the melting properties of the salt was carried out by means of differential scanning calorimetry. The coalescence efficiency of the salts was assessed by re-melting coated aluminum shredding. The results show a decrease of the melting point as the cryolite content increased, in good agreement with the thermodynamical calculations. For cryolite contents up to 3% wt., higher cryolite content in the salt leads to higher coalescence of the remelted shredding. However, the effects of increasing the cryolite content further than 3% wt. are minor. |
| Proceedings Inclusion? |
Planned: Light Metals |
| Keywords |
Other, Aluminum, Recycling and Secondary Recovery |