Experimental data on pellet-sinter mixtures in draw down tests

This dataset contains experimental measurements of pellet-sinter mixtures in the draw-down test, which was conducted to investigate the flow and segregation behaviour of multi-component granular systems. The study examines the effect of varying pellet-sinter mass ratios (50:50, 75:25, and 25:75) and layering order (standard and reverse layering) on key performance indicators (KPIs), including mass flow rate, angle of repose, shear angle, and segregation.<br><strong>Methodology:</strong>The experiments were performed using a custom-built draw-down test setup, where a controlled discharge mechanism was used to release the granular mixture from the top box (hopper) into the lower box. Load cells were used to measure the mass flow rate as well as the discharged mass into the lower box, while digital image analysis techniques were applied to measure segregation in both horizontal and vertical directions. The angle of repose and shear angle were determined by taking photos at the end of the experiments and applying image processing techniques.<br><strong>Techniques Used:</strong><strong>• Granular material handling:</strong> Controlled experiments on pellet-sinter mixtures.<strong>• Image analysis:</strong> Post-processing using colour thresholding for segregation quantification.<strong>• Load cells:</strong> Measurement of mass flow rate as well as the discharged mass into the lower box.<strong>• Statistical analysis:</strong> Data processing and calculations of confidence intervals.<br>This dataset provides a valuable resource for researchers in the field of granular materials, discrete element modelling (DEM) validation, and industrial bulk material handling applications. The data can be used to reproduce the findings, validate numerical simulations, and explore further aspects of granular segregation and flow dynamics.<br>

本数据集收录了拉锥卸料试验（draw-down test）中球团-烧结矿混合料的实验测量数据，该试验旨在探究多组分颗粒体系的流动与偏析特性。本研究考察了不同球团-烧结矿质量配比（50:50、75:25及25:75）与装填顺序（正序装填、逆序装填）对关键性能指标（KPIs）的影响，所涉指标包括质量流量、休止角、剪切角及颗粒偏析程度。<br>**试验方法：** 实验采用定制化拉锥卸料试验装置，通过受控卸料机构将颗粒混合料从顶部料斗（hopper）排放至下部料箱。测力传感器（load cells）用于测量质量流量及排放至下部料箱的物料总质量，同时通过数字图像分析技术表征水平与垂直方向的颗粒偏析情况。试验结束后通过拍摄物料堆积图像并结合图像处理技术，即可计算得到休止角与剪切角。<br>**所用技术手段：**<br>• 颗粒物料处理：针对球团-烧结矿混合料开展可控化实验。<br>• 图像分析：通过颜色阈值法进行后处理，实现颗粒偏析的定量表征。<br>• 测力传感器（load cells）：测量质量流量及排放至下部料箱的物料总质量。<br>• 统计分析：完成数据处理与置信区间的计算。<br>本数据集可为颗粒物料领域、离散元建模（DEM）验证及工业散料装卸应用的研究人员提供极具价值的参考资源。该数据集可用于复现已有研究结论、验证数值模拟结果，同时可用于拓展颗粒偏析与流动动力学的相关研究方向。