A Radiometric Technique for Monitoring the Desulfurization Process of Blister Copper

Vásquez, Alejandro; Pérez, Francisco; Roa, Maximiliano; Sanhueza, Ignacio; Rojas, Hugo; Parra, Victor; Balladares, Eduardo; Parra, Roberto; Torres, Sergio

doi:10.3390/s21030842

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A Radiometric Technique for Monitoring the Desulfurization Process of Blister Copper

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Metallurgical Engineering Department, University of Concepción, Edmundo Larenas 285, Concepción CCP4070386, Chile

Electrical Engineering Department, University of Concepción, Edmundo Larenas 219, Concepción CCP4070386, Chile

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Sensors 2021, 21(3), 842; https://doi.org/10.3390/s21030842

Received: 10 December 2020 / Revised: 12 January 2021 / Accepted: 24 January 2021 / Published: 27 January 2021

(This article belongs to the Special Issue Advanced Sensors and Signal Processing of Sensor Data: Recent Advances and Applications)

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Abstract

In this paper, a novel optical technique for following the progress of the blister copper desulfurization process is presented. The technique is based on the changes observed in the continuous spectrum of the visible–near-infrared (VIS–NIR) radiation that the blister melt emits while the chemical reactions of the sulfur elimination process are taking place. Specifically, the proposed technique uses an optical probe composed of an optical fiber, a collimating lens, and a quartz tube, which is immersed in the melt. This optical probe provides a field of view of the blowing zone where the desulfurization reaction occurs. The experimental results show that the melt VIS–NIR total irradiance evolves inversely to the SO₂ concentration reported by a gas analyzer based on differential optical absorption spectroscopy. Furthermore, the blister copper spectral emissivity as well as the total emissivity observed throughout the process show strong correlation with the sulfur content during desulfurization reaction. View Full-Text

Keywords: spectral measurements; spectroscopy; optical sensors; emissivity; sensing; blister copper; pyrometallurgy; copper converting; copper desulfurization

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Vásquez, A.; Pérez, F.; Roa, M.; Sanhueza, I.; Rojas, H.; Parra, V.; Balladares, E.; Parra, R.; Torres, S. A Radiometric Technique for Monitoring the Desulfurization Process of Blister Copper. Sensors 2021, 21, 842. https://doi.org/10.3390/s21030842

AMA Style

Vásquez A, Pérez F, Roa M, Sanhueza I, Rojas H, Parra V, Balladares E, Parra R, Torres S. A Radiometric Technique for Monitoring the Desulfurization Process of Blister Copper. Sensors. 2021; 21(3):842. https://doi.org/10.3390/s21030842

Chicago/Turabian Style

Vásquez, Alejandro, Francisco Pérez, Maximiliano Roa, Ignacio Sanhueza, Hugo Rojas, Victor Parra, Eduardo Balladares, Roberto Parra, and Sergio Torres. 2021. "A Radiometric Technique for Monitoring the Desulfurization Process of Blister Copper" Sensors 21, no. 3: 842. https://doi.org/10.3390/s21030842

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