The application of THz-TDS in the characterization of Bayan Obo magnetite ore composition

• Published in: Scientific reports Vol. 14; no. 1; pp. 15033 - 10
• Main Authors: Zhang, Siqi, Zheng, Zhiyuan, Zhang, Mingrui, Zhang, Tong, Zhang, Zili, Huang, Haochong
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group UK 01.07.2024; Nature Publishing Group; Nature Portfolio
• Subjects: 639/624/1075; 639/624/1107/527/2257; 704/2151/2809; Absorption coefficient; Algorithms; Bayan Obo; Fourier transforms; Humanities and Social Sciences; Iron; Iron compounds; Iron sulfides; Magnetite; Mineral exploration; Mineral processing; Minerals; multidisciplinary; Pyrite; Quantitative analysis; Random forest; Reagents; Science; Science (multidisciplinary); Spectroscopy; Spectrum analysis; THz-TDS; THz-TDS; Absorption coefficient; Random forest; Magnetite; Bayan Obo
• ISSN: 2045-2322; 2045-2322
• DOI: 10.1038/s41598-024-65772-0

The application of terahertz time-domain spectroscopy (THz-TDS) in the quantitative analysis of major minerals in Bayan Obo magnetite ore was explored. The positive correlation between the optical parameters of the original ore and its iron content is confirmed. The detections of three main iron containing minerals, including magnetite, pyrite, and hematite, were simulated using corresponding reagents. The random forest algorithm is used for quantitative analysis, and FeS 2 is detected with precision of R 2  = 0.7686 and MAE = 0.6307% in ternary mixtures. The experimental results demonstrate that THz-TDS can distinguish specific iron containing minerals and reveal the potential application value of this testing method in exploration and mineral processing fields.