The rational use of fluorite tailings in cement kilns is an effective method for enhancing their value-added utilization. In this study, the effect of fluorite tailings on the mineral composition of raw meals with different chemical modulus was investigated. It was found that the f-CaO content in clinker increased as the lime saturation ratio (KH), silica modulus (SM) and alumina modulus (IM) of the raw meals rose. The C3S diffraction peak intensity was observed to weaken with higher IM. Fluorite tailings were shown to have a significant effect on raw meals with high KH and IM values, while their impact on clinker mineral phases with varying SM was comparatively minor. Industrial trials demonstrated that the addition of fluorite tailings enhanced the 28 days clinker strength by 2.3 MPa and reduced f-CaO content by 0.27 %. In addition, the X-ray Photoelectron Spectroscopy (XPS) results confirmed further that F was doping into the clinker mineral phase. The findings of this study strongly support the promotion of fluorite tailings technology to enhance the quality of cement clinker.

中文翻译：

---

萤石尾矿对不同化学模量熟料的影响——以回转窑加工为例


在水泥窑中合理利用萤石尾矿是提高其增值利用率的有效方法。本研究研究了萤石尾矿对不同化学模量生料矿物组成的影响。结果表明，随着生料石灰饱和度 （KH）、二氧化硅模量 （SM） 和氧化铝模量 （IM） 的增加，熟料中 f-CaO 含量增加。观察到 C3S 衍射峰强度随着 IM 的增加而减弱。萤石尾矿对 KH 和 IM 值高的生料有显著影响，而它们对 SM 变化的熟料矿物相的影响相对较小。工业试验表明，萤石尾矿的添加使 28 天的熟料强度提高了 2.3 MPa，并将 f-CaO 含量降低了 0.27 %。此外，X 射线光电子能谱 （XPS） 结果进一步证实 F 掺杂到熟料矿物相中。本研究的结果有力地支持推广萤石尾矿技术以提高水泥熟料的质量。