【摘要】 粉体特性研究对于探索矿渣粉高效制备的方法至关重要.选用 Rosin-Rammler-Bennett 方程作为粒度分布模型,对立磨矿渣粉采用分级组合的手段,配制出22种具有不同特征粒径(De=8～20μm)和不同均匀性系数(n=0.9～1.4)的矿渣粉体(n=0.9～1.4).在研究其粉体特性的基础上,建立了矿渣粉的粒度分布参数(n 和 De 值)、压缩应力与粉体的自然堆积密度和压缩密度之间的经验关系模型.发现经400 kPa 压缩应力压实的矿渣粉体,呈现出弹性特征.卸载后其回弹率介于0.33%～0.475%.矿渣粉的比表面积越小,回弹率越大.更多还原

【Abstract】 Study on powder characteristics is very important to explore the highly efficient methods for preparation of ground granulated blast fumace slag (GGBFS).The study took Rosin-Rammler-Bennett equation(RRB) as particle size distribution model and prepare twenty-two GGBFS samples with different characteristic diameter De and homogeneous co- efficient n(De=8～20μm,n=0.9～1.4)through powder gradation and then combination of GGBFS ground in a verti- cal mill.Based on experimental results about powder characteristics of these specimens,experiential mathematic models reflecting relations among natural packing density,compression density,compression stresses and Particle Size Distribu- tion parameters(PSDP)of GGBFS has been built.It is also found that the compacted GGBFS block present certain elas- ticity.After a 400KPa compression stress is unload,the resilience percentage of compressed GGBFS block is between 0. 33%～0.475%.Smaller is Blaine specific surface of GGBFS,larger is its resilience percent.更多还原