Ferric-rich calcium sulfoaluminate (FR-CSA) cement is a type of low-carbon cement. Common CSA needs to consume a large number of bauxite during the preparation process. In FR-CSA, Fe₂O₃ can act as an alternative for Al₂O₃ by shaping some iron-bearing minerals (Ca₄Al₂Fe₂O₁₀ (C₄AF), Ca₂Fe₂O₅ (C₂F), and Ca₄Al_6−2xFe_2xSO₁₆ (${\mathrm{C}}_4{\mathrm{A}}_{3-x}{\mathrm{F}}_x\stackrel{-}{\mathrm{S}}$)). In order to reduce the use of Al₂O₃ and optimize the iron-bearing mineral compositions in the FR-CSA clinker, this study investigated the effect of CaSO₄ batching in raw material on the formation of C₄AF and ${\mathrm{C}}_4{\mathrm{A}}_{3-x}{\mathrm{F}}_x\stackrel{-}{\mathrm{S}}$ at 1250 °C. It was proved that CaSO₄ plays an important role and the maximum incorporation amount of Fe₂O₃ could be 16.18 wt% in ${\mathrm{C}}_4{\mathrm{A}}_{3-x}{\mathrm{F}}_x\stackrel{-}{\mathrm{S}}$, thereof x in the subscripts being 0.33. With the CaSO₄ contents in the targeted clinker increasing from 0 to 10 wt%, the effective utilization rates of both Al₂O₃ and Fe₂O₃ significantly increased. When the excess amount of CaSO₄ was >10 wt%, the effective utilization rate of Fe₂O₃ increased but that of Al₂O₃ decreased. The findings in this research can contribute to the mineral optimization of FR-CSA cement clinker and the improvement of effective utilization of Al₂O₃ and Fe₂O₃. The production of high-performance FR-CSA cement becomes possible by the substitution of solid wastes containing relatively low Al₂O₃ content for bauxite.

富铁硫铝酸钙（FR-CSA）水泥是一种低碳水泥。普通CSA在制备过程中需要消耗大量的铝土矿。在FR-CSA中，Fe ₂ O ₃可以通过成形一些含铁矿物（Ca ₄ Al ₂ Fe ₂ O ₁₀（C ₄ AF），Ca ₂ Fe ₂ O ₅（C ₂）来替代Al ₂ O ₃。F）和Ca ₄ Al _{6-2 x} Fe _2x SO ₁₆（${\mathrm{C}}_4{\mathrm{一种}}_{3--X}{\mathrm{F}}_X\stackrel{--}{\mathrm{小号}}$））。为了减少FR-CSA熟料中Al ₂ O _3的使用并优化含铁矿物成分，本研究调查了原料中CaSO ₄配料对C ₄ AF和C ₄ AF形成的影响。${\mathrm{C}}_4{\mathrm{一种}}_{3--X}{\mathrm{F}}_X\stackrel{--}{\mathrm{小号}}$在1250°C下。事实证明，CaSO ₄发挥了重要作用，Fe ₂ O ₃的最大掺入量为16.18 wt％。${\mathrm{C}}_4{\mathrm{一种}}_{3--X}{\mathrm{F}}_X\stackrel{--}{\mathrm{小号}}$，其下标中的x为0.33。随着目标熟料中CaSO ₄含量从0增至10 wt％，Al ₂ O ₃和Fe ₂ O ₃的有效利用率均显着提高。当CaSO ₄的过量＞ 10wt％时，Fe ₂ O ₃的有效利用率增加，而Al ₂ O ₃的有效利用率降低。该研究结果可为FR-CSA水泥熟料的矿物优化和提高Al ₂ O ₃和Fe ₂的有效利用做出贡献。O ₃。通过用铝土矿替代Al ₂ O ₃含量相对较低的固体废物，可以生产高性能的FR-CSA水泥。