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| Research on Fiber Recovery Technology from Fine Screening Residues in OCC Pulping by High-frequency Shear Disintegration Combined with Flotation |
| Received:December 31, 2025 Revised:February 10, 2026 |
| DOI：10.11980/j.issn.0254-508X.2026.06.011 |
| Key Words:OCC pulping high-frequency shear disintegration fine screening residues macro stickies dirt |
| Fund Project:中轻集团科技创新基金项目（ZQ2023YY-GX01）。 |
| Author Name | Affiliation | Postcode | | FAN Shujie* | 1China National Pulp and Paper Research Insitute Co., Ltd., Beijing,100102
2National Engineering Lab for Pulp and Paper, Beijing, 100102 | 100102 | | LI Teng | 3Shandong Kunsheng Environmental Protection Technology Co., Ltd., Liaocheng, Shandong Province, 252500 | 252500 | | WANG Lin | 4Sinolight Guotai Machinery Co., Ltd., Yueyang, Hu’nan Province, 414000 | 414000 | | YANG Bin | 1China National Pulp and Paper Research Insitute Co., Ltd., Beijing,100102
2National Engineering Lab for Pulp and Paper, Beijing, 100102 | 100102 | | LIAO Yanhua | 5China CEC Engineering Corporation, Changsha, Hu’nan Province, 410114 | 410114 | | LI Nan | 1China National Pulp and Paper Research Insitute Co., Ltd., Beijing,100102
2National Engineering Lab for Pulp and Paper, Beijing, 100102 | 100102 | | ZHANG Yu | 1China National Pulp and Paper Research Insitute Co., Ltd., Beijing,100102
2National Engineering Lab for Pulp and Paper, Beijing, 100102 | 100102 | | SU Zhenhua* | 1China National Pulp and Paper Research Insitute Co., Ltd., Beijing,100102
2National Engineering Lab for Pulp and Paper, Beijing, 100102 | 100102 |
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| Abstract:Using fine screening residues generated during the pulping process of old corrugated containers (OCC) as raw material， this study explored the effect of a combined process involving high-frequency shear disintegration and flotation on impurity removal and fiber recycling. The results showed that the high-frequency disintegration stage could reduce the total amount of macro stickies by over 63% and remove over 40% of large-sized dirt， while significantly enhancing the strength of the resultant pulp， with tensile index and burst index of pulp increasing by 86.2% and 104.4%， respectively. The flotation stage could further reduce residual macro stickies to below 3% of the original level， remove 28.8% of dirt， and improve the tensile index and burst index of pulp by an additional 10.0% and 10.2%， respectively. After treatment with the combined high-frequency shear disintegration and flotation process， the amount of discharged flotation reject was 2~4 kg/t of pulp， with a calorific value reaching 20 MJ/kg， demonstrating its potential as a clean fuel. However， zinc was detected in the ash content， indicating that subsequent utilization require measures to prevent environmental accumulation risks. |
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