Fundamental Study of the Production of Paper Ash Made from Paper Sludge II : Development of Paper Ash Application Technology to Improve the Bulk and Save Drying Energy of Paperboard

Ji Young Lee; Hae Min Jo; Yeon Hui Lee; Jae Young Lee; Chul Hwan Kim

doi:10.7584/JKTAPPI.2021.04.53.2.48

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Fundamental Study of the Production of Paper Ash Made from Paper Sludge II : Development of Paper Ash Application Technology to Improve the Bulk and Save Drying Energy of Paperboard 제지슬러지로 제조된 제지애쉬의 고도활용을 위한 기초연구 II : 판지의 벌크 향상과 건조에너지 절감을 위한 제지애쉬 적용 기술 개발

30 April 2021. pp. 48-56

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Abstract

In this study, paper ash generated during the incineration process of paper sludge was applied to measure the bulk, strength, and drying energy reduction of paperboard to assess the possibility of using it as an inorganic additive in paperboard mills. Three types of paper ash were fabricated by incineration, crushed, and fractionated with three different screen sizes, and their physical properties were measured. The fabricated paper ashes were added to Korean old corrugated containers (KOCC) stock to make handsheets, and their physical properties and drying energy reduction were determined. In addition, paper ash particles classified into 200 mesh screens were surface-modified with cationic polyacrylamide (C-PAM), and the handsheets were manufactured to analyze the strength improvement effect of paperboard. The bulk and the drying energy reduction improved as the paper ashes were added into the KOCC stock, but the tensile index, compression index, and burst strength decreased. In particular, the higher the average particle size of the paper ash, the higher the bulk and the drying energy reduction, but the lower the strength. The surface modification of the paper ash with C-PAM was effective in improving the strength. Therefore, paper ash made of paper sludge collected from specialty paper mills is effective in improving the bulk and drying energy reduction of paperboard, and surface modification with C-PAM is required to prevent the deterioration of paper strength.

Keywords

Paper ash

paper sludge

paperboard

physical properties

drying energy

surface modification

References

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Information

Publisher :Korea Technical Association of The Pulp and Paper Industry
Publisher(Ko) :한국펄프종이공학회
Journal Title :Journal of Korea TAPPI
Journal Title(Ko) :펄프종이기술
Volume : 53
No :2
Pages :48-56
Received Date : 2021-04-01
Revised Date : 2021-04-15
Accepted Date : 2021-04-19
DOI :https://doi.org/10.7584/JKTAPPI.2021.04.53.2.48

Journal of Korea TAPPI ISSN:0253-3200(Print) 펄프종이기술

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Literature Cited