CAJ | 학술논문

颗粒的球磨粉碎以介质球间非限制料层破碎为主，料层的夹持特性与颗粒破碎密切相关。通过石英颗粒料层挤压实验和离散元仿真发现，介质球径和颗粒粒度对夹持料层厚度存在显著的影响：介质球径小则料层薄、颗粒粒度小则料层厚。通过对实验数据的回归分析，构建了石英颗粒的夹持料层高度计算模型；依据料层高度与料层自锁条件给出了料层夹持范围计算公式，计算模型和公式与料层挤压实验结果符合较好。
과립적구마분쇄이개질구간비한제료층파쇄위주，료층적협지특성여과립파쇄밀절상관。통과석영과립료층제압실험화리산원방진발현，개질구경화과립립도대협지료층후도존재현저적영향：개질구경소칙료층박、과립립도소칙료층후。통과대실험수거적회귀분석，구건료석영과립적협지료층고도계산모형；의거료층고도여료층자쇄조건급출료료층협지범위계산공식，계산모형화공식여료층제압실험결과부합교호。
Particles were mainly comminuted by ball mill within unconfined beds and nipped con-figuration was bound up with particle breakage.The experimental results and simulation show that the sizes of media balls and quartz particles have influences on the height of nipped bed,and the smal-ler ball and larger particle make the bed thin.A mathematical model that described the heights of nipped bed based on experimental data regression was proposed.The formula of the nipped range was deduced from the bed heights and self-locking of beds.The model and formula were validated using experimental data with good agreement.