| About this Abstract |
| Meeting |
Liquid Metal Processing & Casting Conference (LMPC 2022)
|
| Symposium
|
Liquid Metal Processing & Casting Conference (LMPC 2022)
|
| Presentation Title |
Swing Control in ESR- Challenges, Influences and Outlook on a Key Control Parameter to Obtain Superior Ingots |
| Author(s) |
Manfred Ramprecht, Michael Kubin, Alexander Scheriau, Harald Holzgruber |
| On-Site Speaker (Planned) |
Michael Kubin |
| Abstract Scope |
Beside a precise melt rate control, the immersion depth of the electrode in the slag bath represents the most decisive parameter for process stability and subsequently superior product ESR quality.
To control the immersion depth in INTECO´s industrial ESR-furnaces the “swing” of the bath-resistance is applied. Deriving the immersion depth from the slag bath resistance calculated from melting power and current is one of the key control mechanism ESR. Depending on the furnace size and configuration (selected type and frequency of power supply) various influences have to be taken into account.
This papers gives an overview on the basic philosophy of swing calculation and control and detailed measurements are presented to verify the control algorithm. Based on operational experiences of ESR furnaces ranging from 5t-250t of ingot weight and based on different power supply systems installed, the dependency of resistance and resistance variation on the immersion depth is discussed. |
| Proceedings Inclusion? |
Definite: At-meeting proceedings |