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| MD3000低浓实验盘磨机恒间隙循环磨浆特性研究 |
| Refining Characteristics of MD3000 Low Consistency Experimental Disc Refiner Operating by Constant-gap Circulating Mode |
| 收稿日期：2025-02-20 修订日期：2025-03-04 |
| DOI：10.11980/j.issn.0254-508X.2025.07.020 |
| 关键词: 制浆造纸 盘磨机 恒间隙操作 磨浆特性 量化表征 |
| Key Words:pulping and papermaking disc refiner constant-gap operation refining characteristics quantitative characterization |
| 基金项目:陕西省教育厅科学研究计划项目（24JP031）；陕西省重点研发计划（2025GH-YBXM-006）。 |
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| 摘要:本研究以MD3000低浓实验盘磨机为基础，采用磨齿倾角22°的等距直齿磨盘，研究了阔叶木浆恒间隙（0.1 mm）循环磨浆特性。结果表明，浆料打浆度升高导致其黏度及磨区剪切应变降低，使得恒间隙循环磨浆总功率降低，且功率降低的速率随打浆度的升高而逐渐增大；而打浆度及纤维平均长度的相对变化曲线可以用于表征磨浆过程中磨齿对纤维的切断及细纤维化作用程度。本研究提出了一种基于纸张的微观形貌定量表征的磨浆优化方法，发现其确定的磨浆极限与纸张强度指标变化具有较好的相关性，以期为低浓磨浆过程的表征、磨片的优化设计及其高效低能耗运行提供参考。 |
| Abstract:This study investigated the constant-gap (0.1 mm) cyclic refining characteristics of hardwood pulp using a MD3000 low-consistency experimental disc refiner equipped with straight-bar plates featuring a 22° angle. The result showed that the increase in beating degree of pulp led to a reduction in its viscosity and shear strain within the refining zone， thereby causing a decrease in total refining power. Furthermore， the rate of power reduction gradually increased with the elevation of beating degree. The relative changes in beating degree and fiber average length were employed to characterize fiber cutting and fibrillation degree during refining. A refining optimization method based on quantitative characterization of paper micro-morphology was developed， demonstrating significant correlation between the determined refining limit and variations in paper strength parameters， in order to provide references for the characterization of low-consistency refining processes， optimization of plate design， and the high-efficiency， low-energy operation. |
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