X-ray diffraction analysis of the common tailings of the Yunfu pyrite mine revealed that the tailings mainly quartz, anorthite, gypsum, pyrite and mica group minerals (Chen et al., 2016). The tailings' major chemical composition is SiO 2, Fe 2 O 3, Al 2 O 3, CaO, and SO 3, with the SO 3 level ranging from 15.89% to 18.27% ( Yin et al., 2022 ).