This work investigates the proportion of generated fines in a pilot-scale experiment using a belt conveyor and commercial fuel pellets. For this, a belt conveyor with a length of 3.1 m was used and operated at varying conditions: speeds, percentages of material loading on the belt, two combinations of the inclination angle of the belt and the falling height, and a different number of handling steps. We considered a design of experiments approach based on response surface methodology to investigate the effect of different conditions on the potential of fines generation. Moreover, a comparison between the results of the belt conveyor and three common benchmark experimental approaches (tumbling box, rotary impact tester, and mechanical compression test) was made. Results show that the number of handling steps and the combined effect of drop height and inclination angle directly affected the fines generation. However, the tested belt speed range and the level of loading were of lower significance. A polynomial quadratic model was derived based on the regression analysis and showed a high accuracy to predict the proportion of fines. Moreover, the tumbling box method showed good potential to predict the proportion of fines in a belt conveyor when transported several times.

这项工作调查了在使用皮带输送机和商业燃料芯块的中试规模实验中产生的细粉的比例。为此，使用了长度为 3.1 m 的带式输送机并在不同条件下运行：速度、带上材料装载的百分比、带倾斜角和下落高度的两种组合以及不同的搬运次数脚步。我们考虑了基于响应面方法的实验设计方法来研究不同条件对细粉生成潜力的影响。此外，还对带式输送机的结果与三种常见的基准实验方法（翻滚箱、旋转冲击试验机和机械压缩试验）的结果进行了比较。结果表明，处理步骤的数量以及跌落高度和倾角的综合影响直接影响细粉的产生。然而，测试的皮带速度范围和负载水平的意义较低。基于回归分析推导出多项式二次模型，预测细粉比例具有较高的准确性。此外，翻滚箱法在预测带式输送机多次运输时的细粉比例方面表现出良好的潜力。