Sensitivity Analysis of State Space Models for Scrap Composition Estimation in EAF and BOF
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| Format: | Preprint |
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2025
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| _version_ | 1866911051184865280 |
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| author | Zhou, Yiqing Naert, Karsten Nuyens, Dirk |
| author_facet | Zhou, Yiqing Naert, Karsten Nuyens, Dirk |
| contents | This study develops and analyzes linear and nonlinear state space models for estimating the elemental composition of scrap steel used in steelmaking, with applications to Electric Arc Furnace (EAF) and Basic Oxygen Furnace (BOF) processes. The models incorporate mass balance equations and are fitted using a modified Kalman filter for linear cases and the Unscented Kalman Filter (UKF) for nonlinear cases. Using Cu and Cr as representative elements, we assess the sensitivity of model predictions to measurement noise in key process variables, including steel mass, steel composition, scrap input mass, slag mass, and iron oxide fraction in slag. Results show that the models are robust to moderate noise levels in most variables, particularly when errors are below $10\%$. However, accuracy significantly deteriorates with noise in slag mass estimation. These findings highlight the practical feasibility and limitations of applying state space models for real-time scrap composition estimation in industrial settings. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2504_11319 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Sensitivity Analysis of State Space Models for Scrap Composition Estimation in EAF and BOF Zhou, Yiqing Naert, Karsten Nuyens, Dirk Systems and Control 93C41, 90B30, 80A19, 93E11, 93C10 This study develops and analyzes linear and nonlinear state space models for estimating the elemental composition of scrap steel used in steelmaking, with applications to Electric Arc Furnace (EAF) and Basic Oxygen Furnace (BOF) processes. The models incorporate mass balance equations and are fitted using a modified Kalman filter for linear cases and the Unscented Kalman Filter (UKF) for nonlinear cases. Using Cu and Cr as representative elements, we assess the sensitivity of model predictions to measurement noise in key process variables, including steel mass, steel composition, scrap input mass, slag mass, and iron oxide fraction in slag. Results show that the models are robust to moderate noise levels in most variables, particularly when errors are below $10\%$. However, accuracy significantly deteriorates with noise in slag mass estimation. These findings highlight the practical feasibility and limitations of applying state space models for real-time scrap composition estimation in industrial settings. |
| title | Sensitivity Analysis of State Space Models for Scrap Composition Estimation in EAF and BOF |
| topic | Systems and Control 93C41, 90B30, 80A19, 93E11, 93C10 |
| url | https://arxiv.org/abs/2504.11319 |