为提高镍渣的反应活性，根据机械力化学原理，采用高能球磨技术处理镍渣并采取蒸压工艺制备镍渣制品．通过粒径分析、X射线分析以及扫描电镜分析等手段研究不同高能球磨时间下镍渣的粒径、结构和形貌变化以及镍渣的反应活性变化．结果表明：高能球磨可以进一步细化镍渣，使大颗粒块状粉体破裂、表面粗糙化并提高镍渣的反应活性，长时间球磨可使水化样品诱导期和加速期两个阶段的水化放热量显著增大；高能球磨4h时镍渣蒸压试块的强度最大，可达24．4 MPa，是未高能球磨时的4．5倍，球磨4 h后蒸压试块水化产物的X射线谱图中出现了硬硅钙石、托勃莫来石和镁水化物等衍射峰．
To improve the reactivity of nickel slag, high?energy ball milling was used to treat the nickel slag according to the theory of mechanochemistry. Particle size analysis, XRD and SEM test were used to study the changes of the particle size, microstructure, morphology and the hydration activity of the nickel slag powder. The results show that high?energy ball milling can further refine the nickel slag, crack the large particles and roughen the surface. At the same time, reactive activity of nickel slag can be improved. Long time milling can increase the hydration heat of the induction period and the acceleration period significantly. When the milling time is 4 h, the strength of the nickel slag block can be the highest, up to 24.4 MPa, which is 4.5 times of the un?milling?slag block. After milling for 4 h, the main X?ray diffraction peaks of hydration products are xonotlite, tobermorite and magnesium hydrate.
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