Improved back propagation neural network method for predicting sulfur content in hot metalSong Zhang, Maoqiang Gu, Yanbing Zong, Zhenyang Wang, Jianliang Zhang, Dewen Jiang, Jing Pang, Shushi Zhang and Ruishuai SiMetall. Res. Technol., 121 1 (2024) 103DOI: https://doi.org/10.1051/metal/2023080