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| Refining Characteristics of MD3000 Low Consistency Experimental Disc Refiner Operating by Constant-gap Circulating Mode |
| Received:February 20, 2025 Revised:March 04, 2025 |
| DOI：10.11980/j.issn.0254-508X.2025.07.020 |
| Key Words:pulping and papermaking disc refiner constant-gap operation refining characteristics quantitative characterization |
| Fund Project: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）。 |
| Author Name | Affiliation | Postcode | | LIU Huan* | State Key Lab of Bio-based Fiber Materials, Tianjin Key Lab of Pulp and Paper, China Light Industry Key Lab of Paper-making and Bio-refinery, Tianjin University of Science and Technology, Tianjin, 300457 | 300457 | | LIU Hongbin* | State Key Lab of Bio-based Fiber Materials, Tianjin Key Lab of Pulp and Paper, China Light Industry Key Lab of Paper-making and Bio-refinery, Tianjin University of Science and Technology, Tianjin, 300457 | 300457 | | DONG Jixian | College of Mechanical and Electrical Engineering, Shaanxi University of Science & Technology, Xi’an, Shaanxi Province, 710021 | 710021 | | QIAO Lijie | College of Mechanical and Electrical Engineering, Shaanxi University of Science & Technology, Xi’an, Shaanxi Province, 710021 | 710021 | | GUO Xiya | College of Mechanical and Electrical Engineering, Shaanxi University of Science & Technology, Xi’an, Shaanxi Province, 710021 | 710021 |
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| 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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