锌尾矿是一种有害的工业废弃物，清洁与高效利用锌尾矿不仅具有重要的环保价值，还能产生显著的经济效益。以某锌尾矿为添加剂制备了硅酸盐水泥熟料，研究了锌尾矿对熟料相组成、显微结构与水化性能的影响，探讨了Zn²⁺在熟料水化过程中的转移行为，最后总结出Zn²⁺浸出活性的钝化机理。结果表明：引入锌尾矿促进了f-CaO溶于液相，有助于C₃S晶粒的发育生长。但锌尾矿的引入也会导致ZnO与C₃A发生反应，生成了Ca₁₄Al₁₀Zn₆O₃₅，从而抑制了C₃A相的合成。随着锌尾矿的掺入，水泥净浆的3 d抗压强度逐渐下降，7 d与28 d的抗压强度却逐渐上升。当锌尾矿的掺入量增至12%，试件养护28 d后具有43.49 MPa的抗压强度。Zn²⁺浸出活性的钝化机理研究结果表明，部分Zn²⁺能固溶于C₃S相，但大多数Zn²⁺分布于中间相，并以合成无水化活性的Ca₁₄Al₁₀Zn₆O₃₅的途径被固化；此外，水化后含Zn²⁺的C₃S生成水化硅酸钙凝胶物理包裹Zn²⁺，束缚其浸出活性，两者协同赋予制品良好的环境安全性。研究结果为锌尾矿的清洁高效利用提供了新的途径。

Zinc tailings are harmful industrial wastes.Clean and efficient utilization of zinc tailings not only has important environmental value，but also generates significant economic benefits.In this study，a silicate cement clinker was prepared with sphalerite tailings as additive，and the effect of tailings on the phase composition，microstructure，and hydration performance of clinker was studied.The transfer behavior of Zn²⁺ during the hydration process of clinker was explored.The passivation mechanism of Zn²⁺ leaching activity was also investigated at last.The results showed that the introduction of sphalerite tailings promoted the dissolution of f-CaO into liquid phase，thus accelerating C₃S grain growth.While the synthesis of C₃A phase was prevented after the addition of the sphalerite tailings，because of a reaction occurrence between ZnO and C₃A to generate Ca₁₄Al₁₀Zn₆O₃₅.As a consequence，the 3 d compressive strength of cement slurry was gradually decreased，but the gradual improvements in 7 d and 28 d compressive strengths were present as a function of tailings addition.When 12% sphalerite tailings was introduced.A rubber sand specimen exhibited a 43.49 MPa compressive strength after 28 d curing.The passivation mechanism of Zn²⁺ leaching activity showed that some Zn²⁺ could be solid dissolved in C₃S phase.But most of Zn²⁺ were distributed in the intermediate phase，and it was solidified through the synthesis of anhydrous Ca₁₄Al₁₀Zn₆O₃₅. More over，C₃S containing Zn²⁺ generated hydrated calcium silicate gel after hydration，which could physically wrap the ion and restrain its leaching activity，thus collectively endowing the product with good environmental safety.The research results provided a new approach for the clean and efficient utilization of zinc tailings.