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arXiv · 2405.04275

Grey-box Recursive Parameter Identification of a Nonlinear Dynamic Model for Mineral Flotation

Rodrigo A. González·Paulina Quintanilla
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Abstract

This study presents a grey-box recursive identification technique to estimate key parameters in a mineral flotation process across two scenarios. The method is applied to a nonlinear physics-based dynamic model validated at a laboratory scale, allowing real-time updates of two model parameters, n and C, in response to changing conditions. The proposed approach effectively adapts to process variability and allows for continuous adjustments based on operational fluctuations, resulting in a significantly improved estimation of concentrate grade - one key performance indicator. In Scenario 1, parameters n and C achieved fit metrics of 97.99 and 96.86, respectively, with concentrate grade estimations improving from 75.1 to 98.69 using recursive identification. In Scenario 2, the fit metrics for n and C were 96.27 and 95.48, respectively, with the concentrate grade estimations increasing from 96.27 to 99.45 with recursive identification. The results demonstrate the effectiveness of the proposed grey-box recursive identification method in accurately estimating parameters and predicting concentrate grade in a mineral flotation process.

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Rodrigo A. González, Paulina Quintanilla. 2024-05-07. Grey-box Recursive Parameter Identification of a Nonlinear Dynamic Model for Mineral Flotation. https://doi.org/10.1109/codit62066.2024.10708161

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