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| Study on Deinkability and Properties of Deinked Pulp of CaSiO3-filled Paper |
| Received:July 19, 2021 |
| DOI：10.11981/j.issn.1000-6842.2021.03.49 |
| Key Words:CaSiO3-filled paper;deinking properties;brightness;stickies;fiber morphology |
| Author Name | Affiliation | Postcode | | FAN Shujie* | China National Pulp and Paper Research Insitute Co. Ltd.， Beijing，100102
National Engineering Lab for Pulp and Paper， Beijing， 100102 | 100102 | | SU Zhenhua | China National Pulp and Paper Research Insitute Co. Ltd.， Beijing，100102
National Engineering Lab for Pulp and Paper， Beijing， 100102 | 100102 | | ZHANG Yu | China National Pulp and Paper Research Insitute Co. Ltd.， Beijing，100102
National Engineering Lab for Pulp and Paper， Beijing， 100102 | 100102 |
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| Abstract: |
| The deinking properties of two types of CaSiO3-filled paper were discussed. The results showed that both CaSiO3-filled paper （1#） and CaSiO3/talc-filled paper （2#） had good deinking effect， with comparable flotation deinking yields. The brightness of 1# flotation deinking pulp was 77.5% ISO， slightly higher than that of 2# flotation deinking pulp， which was 73.9% ISO. The ERIC of 1# flotation deinking pulp was 81.24 mm2/m2， slightly lower than that of 2# flotation deinking pulp of 115.96 mm2/m2. In the deinking process， the removal effect of stickies of 1# pulp was slightly better than 2# pulp. The stickies contents of both 1# and 2# pulp were low and would not affect the production. After flotation deinking， the fiber lengths of 1# and 2# repulping pulp decreased，while the content of fines increased. The decrease of fiber length of 1# pulp was slightly more than that of the 2# pulp. Due to the ash existing in the pulp， the intensity index of 1# paper was slightly lower than those of the 2# paper. |
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