锂渣粒度分布特征随研磨时间的演化规律研究OA

To elucidate the continuous evolution of the particle size distribution and its kinetic characteristics during the grinding of lithium slag,industrial by-product lithium slag is mechanically activated by ball milling for different grinding durations.The particle size distribution characteristics are then investigated using a laser particle size analyzer.Unlike previous studies that primarily focused on the static analysis of characteristic particle sizes at individual grinding stages,this paper systematically elucidates the dynamic transformation mechanisms of lithium slag particles across different particle size ranges throughout the entire grinding process.The results showed that the characteristic equivalent particle sizes of lithium slag decreased significantly with increasing grinding time.The grinding process could be well described by the Arrhenius kinetic model.The grinding process presented distinct stages:rapid breakage of coarse particles dominates at the initial stage with high grinding efficiency,whereas enhanced agglomeration of fine particles occurs at the later stage,resulting in a significant reduction in grinding efficiency and gradually approaching dynamic equilibrium.The particle size distributions of lithium slag at different grinding times conformed well to the RRB distribution model,with continuously decreasing characteristic particle sizes and gradually increasing distribution indices.The particle size distribution of lithium slag exhibited significant fractal characteristics,and the fractal dimension was positively correlated with the specific surface area.This paper provides a theoretical basis for optimizing the grinding process and regulating the particle size distribution of lithium slag in cement-based materials.