A Hybrid Digital Twin for Optimal Si-Production

16 Pages Posted: 27 May 2022

Date Written: May 11, 2022

Abstract

Production of high silicon alloys must adhere to a range of expectations and demands. In addition to meeting the customer expectations on quality, the production process itself should be operated such that the raw material and energy consumption is minimized per metric ton produced. Elkem is working on upgrading the decision support systems for plant operators to meet the above-mentioned expectations. In this work, new sensor technology coupled with data-based models has been applied to develop an online decision support system (aka hybrid twin) for production of FeSi75. Infrared camera technology has been applied to the tapping, refining/alloying and casting processes and some preliminary results will be presented, focusing on determining the amount of slag produced in the furnace and tapped with the liquid alloy. In parallell, a data-driven model has been applied to furnace operational parameters in order to predict the amount of slag Based on initial results, application of IR technology combined with image analysis seems to be a viable path forward in order to establish more precise decision support models that will improve product quality and increase yield.

Keywords: Hybrid twin, mathematical model, real-time system, control, optimization, monitoring

Suggested Citation

Linnestad, Kasper and Hildal, Kjetil and Jakobsson, Lars K. and Eidnes, Sølve and Tjessem, Vemund and Bjørnstad, Erlend Lunnan and Wasbø, Stein, A Hybrid Digital Twin for Optimal Si-Production (May 11, 2022). Proceedings of the Silicon for the Chemical & Solar Industry XVI - ISBN 978-82-692919-0-2, Available at SSRN: https://ssrn.com/abstract=4121131 or http://dx.doi.org/10.2139/ssrn.4121131

Kasper Linnestad

Cybernetica AS ( email )

Leirfossvegen 27
Trondheim
Norway

Kjetil Hildal (Contact Author)

Elkem ASA ( email )

Norway

Lars K. Jakobsson

Elkem ASA ( email )

Norway

Sølve Eidnes

SINTEF Digital ( email )

Forskningsveien 1
Oslo, 0373
Norway

Vemund Tjessem

Cybernetica AS ( email )

Leirfossvegen 27
Trondheim
Norway

Erlend Lunnan Bjørnstad

Elkem ASA ( email )

Norway

Stein Wasbø

Cybernetica AS ( email )

Leirfossvegen 27
Trondheim
Norway

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