| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Cast Shop Technology
|
| Presentation Title |
Accurate Real-time Elemental (LIBS) Analysis of Molten Aluminum and Aluminum Alloys |
| Author(s) |
Sveinn Hinrik Gudmundsson, Jon Matthiasson, Kristjan Leosson |
| On-Site Speaker (Planned) |
Kristjan Leosson |
| Abstract Scope |
Real-time LIBS analysis for monitoring and process control in a primary aluminum smelter is reported. Chemical analysis was carried out directly in a casting launder as well as with robotic sample feeding at a crucible skimming station. For a number of trace elements, quantification limits down to 10ppm or lower have been demonstrated, exhibiting measurement repeatability for direct melt measurements of the same order as observed in OES analysis on corresponding solid samples. Furthermore, LIBS analysis allows the time-varying concentration of elements in the melt to be monitored on a minute-by-minute basis. Our results confirm that for many technologically important elements, LIBS analysis represents a competitive alternative to laboratory OES, provided that suitable access to the liquid aluminum can be ensured. This approach improves plant safety by reducing the need for manual sampling of liquid metal, eliminates operator-related errors in chemical analysis and is critical for automation of casthouse operations. |
| Proceedings Inclusion? |
Planned: Light Metals |