针对大宗工业冶炼固废硬质难磨、干磨易团聚等问题，创新性地采用湿磨工艺对磷石膏及镍铁渣的胶凝活性进行协同活化。通过对原料粒径分布和Zeta电位的表征，优化了湿磨时间，在此基础上构建了磷石膏-镍铁渣基胶凝材料体系。采用X射线衍射、热活性微量热、热重分析仪和扫描电子显微镜等技术手段对水化产物进行了性能评价，并提出了水化动力学过程及产物演变规律。结果表明，当湿磨时间为6 h，原料配比为m_镍铁渣：m_磷石膏∶m_水泥=55∶25∶20时，制备的磷石膏-镍铁渣基胶凝材料力学性能最佳，砂浆试块3 d抗折强度和抗压强度分别为4.8 MPa和19.7 MPa，28 d抗折强度和抗压强度分别为8.5 MPa 和59.9 MPa。机理研究表明，当磷石膏掺入量为25%（质量分数）时，能够显著促进镍铁渣中Ca²⁺、Al³⁺和Si²⁺的溶出，有利于三硫型水化硫铝酸钙（钙矾石，AFt）和C-S-H凝胶的共同生长，AFt与C-H-S凝胶相互交错，增加了基体的实密度。该研究为大宗工业固废的高值化利用提供了新途径和理论支撑。

In this study，aiming at the problem of hard and difficult grinding of solid waste in bulk industrial smelting and the technical bottleneck of easy agglomeration of dry grinding，the wet grinding process was innovatively used to synergistically activate the cementitious activity of phosphogypsum and ferronickel slag.The wet grinding time was optimized by characterizing the particle size distribution and Zeta potential of the raw materials.On this basis，the phosphogypsum-nickel-iron slag-based cementitious material system was constructed.The hydration products were characterized by X-ray diffractometer，thermal active microcalorimeter，thermogravimetric analyzer and scanning electron microscope.The performance evaluation was carried out，and the hydration kinetic process and product evolution law were proposed.The results indicated that the cementitious materials prepared from phosphogypsum and ferronickel slag exhibited optimal mechanical properties when the wet grinding time was 6 h and the raw material mass ratio was m_{ferronickel slag}：m_{phosphogypsum}∶m_cement=55∶25∶20.Under these conditions，the mortar specimens achieved flexural strengths of 4.8 MPa and compressive strengths of 19.7 MPa at 3 d，and flexural strengths of 8.5 MPa and compressive strengths of 59.9 MPa at 28 d.Mechanistic research revealed that when phosphogypsum was incorporated at 25%，it significantly promoted the leaching out of Ca²⁺，Al³⁺，and Si⁴⁺ ions from the ferronickel slag.It facilitated the co-growth of trisulfoaluminate hydrate（ettringite，AFt） and C-S-H gel.These hydration products interlaced with each other，increasing the compactness of the matrix.This research provided a novel approach and theoretical underpinning for the high-value utilization of bulk industrial solid wastes.