A Radiometric Technique for Monitoring the Desulfurization Process of Blister Copper

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

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.

Más información

Título según WOS: A Radiometric Technique for Monitoring the Desulfurization Process of Blister Copper
Título de la Revista: SENSORS
Volumen: 21
Número: 3
Editorial: MDPI
Fecha de publicación: 2021
DOI:

10.3390/S21030842

Notas: ISI