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And the TFe content is the main indicator that determines the grade of the iron ore and whether the iron ore can be smelted directly. Unlike manual methods and methods for chemical analysis, the paper uses the selection of band for the near\u2010infrared spectrum based on the pruning method and the two\u2010hidden\u2010layer extreme learning machine based on LU decomposition and seagull optimization algorithm (LU\u2010TELM\u2010SOA) to identify the TFe content. First of all, the paper proposes the selection of band based on the pruning method to retain the sensitive band of the near\u2010infrared spectrum. Aiming at the problems of poor stability and low accuracy of a single LU\u2010TELM (the two\u2010hidden\u2010layer extreme learning machine based on LU decomposition) model, the paper proposes LU\u2010TELM\u2010SOA. 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