Abstract In this work, the American Old Corrugated Containers (OCC) pulp was screened using pressure screen to investigate the factors affecting the fractionation performance. Three screen cylinders with different geometries, aperture size/contour heights, volumetric reject ratios, and aperture velocities were used. The results showed that the passing ratio of fibres increased with the increase of contour height, volumetric reject ratio, and aperture velocity for all the three screen cylinders. Moreover, among the three cylinders investigated, the 0.81 mm hole cylinder achieved the highest fractionation efficiency with a volumetric reject ratio of 0.1 followed by 0.15 and 0.2 mm slot screens. Freeness change of the accept side of the screen was similar to passage ratio, which shows an increasing trend with the increasing aperture velocity and volumetric reject ratio. However, the reject freeness showed decreasing trends with the increasing aperture velocity V s {V_{s}} and volumetric reject ratio R v {R_{v}}.

中文翻译：

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美国旧瓦楞纸箱纸浆在压力筛分中的分馏性能洞察

摘要 在这项工作中，使用压力筛对美国旧瓦楞纸箱（OCC）纸浆进行了筛选，以研究影响分馏性能的因素。使用了三个具有不同几何形状、孔径尺寸/轮廓高度、体积废品率和孔径速度的筛筒。结果表明，三个筛筒的纤维通过率随着轮廓高度、体积废品率和孔径速度的增加而增加。此外，在研究的三个圆柱体中，0.81 毫米孔圆柱体实现了最高的分馏效率，体积废品率为 0.1，其次是 0.15 和 0.2 毫米狭缝筛网。筛网接受侧的游离度变化与通过率相似，随着孔径速度和体积废品率的增加，它显示出增加的趋势。然而，随着孔径速度 V s {V_{s}} 和体积废品率 R v {R_{v}} 的增加，废品自由度呈下降趋势。