本项目采用机械力化学方法制备高硅铁尾矿粉，将其作为辅助胶凝材料与水泥共同组成复合胶凝材料。探索机械力化学作用前后高硅铁尾矿的化学组成、矿物组成、结晶程度及颗粒粒度等矿物学特性，分析高硅铁尾矿机械力化学效应，为揭示高硅铁尾矿在复合水泥胶凝材料中的作用机理奠定基础；探索高硅铁尾矿作为辅助胶凝材料对复合水泥胶凝材料的粉体颗粒级配构成、水化放热、水化产物生成、硬化浆体微观形貌及其细微观结构的形成等规律的影响，系统阐明水泥-高硅铁尾矿复合胶凝材料水化胶凝的发生及发展进程，从而揭示高硅铁尾矿在复合水泥胶凝材料中的作用机理。本项目研究成果将为高硅铁尾矿在水泥基材料中的应用提供坚实的理论基础，对于高硅铁尾矿的资源化具有重要的科学意义。

In the research, grinding will be adopted as the main means of mechanochemical activation to process the high-silicon iron tailings, and the high-silicon iron tailings powder, as a supplementary cementing material, is used for the preparation of cement-based compound cementitious materials . The mineralogical properties of high-silicon iron tailings before and after mechanical grinding, such as chemical compositions, mineral compositions, crystallinity, and particle size, will be explored, and the effects of mechano-chemistry of high-silicon iron tailings will also be researched, which are the foundation of study on mechanism of high-silicon iron tailings in cement-based compound cementitious materials. The influence rules of high-silicon iron tailings activated mechanochemically on binder particle grading, hydration heat, hydration products, and microstructure of hardened binder paste will be studied, and then mechanism of high-silicon iron tailings acting in cement-based compound cementitious materials will be further revealed. The research achievement will provide theoretical foundation for utilization of high-silicon iron tailings in cement-based compound cementitious materials, and is of great scientific significance to recycling of high-silicon iron tailings.