Effects of Inorganic Coagulants on Sizing and Contamination in Newsprint Mill

Tai-ju Lee; Jin Ho Seo; Kwang Seob Lee; Sung Hyun Jeong; Jeong Yong Ryu

doi:10.7584/ktappi.2015.47.3.040

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Effects of Inorganic Coagulants on Sizing and Contamination in Newsprint Mill 무기 응결제가 신문용지의 사이즈도와 공정오염에 미치는 영향

30 June 2015. pp. 40-46

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Abstract

For some Korean newsprint mill, addition level of aluminum sulfate has been reduced because sulfur from aluminum sulfate has detrimental effect on the efficiency of anaerobic water treatment. At this moment, an unexpected decrease in sizing degree of TMP mixed newspaper was occurred. The phenomena means that hydrophobic substance usually originated from TMP cannot be fixed on the paper. This study focused on effect of alum and PAC on sizing of paper and contamination. Also, substitutability of PAC was discussed as a possible alternatives of aluminum sulfate under anaerobic condition of water treatment. Evaluation of sizing degree and pitch deposit potential were performed at the varied addition level of PAC and aluminum sulfate. Hydrophobic substance mainly derived from TMP could be fixed on the surface of fiber by PAC. Fines retention was not changed by replacing aluminum sulfate with PAC. Additionally, fixing of hydrophobic substance without excessive agglomeration can be enhanced by PAC with low molecular weight. Consequently, sizing degree of newspaper and contamination of recycling process of ONP can be controlled by low molecular weighted PAC.

Keywords

Newsprint

Thermo-mechanical pulp

Poly-aluminum chloride

Aluminum sulfate

Sizing

Stickies

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 : 47
No :3
Pages :40-46
Received Date : 2015-06-10
Revised Date : 2015-06-17
Accepted Date : 2015-06-19
DOI :https://doi.org/10.7584/ktappi.2015.47.3.040

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

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Literature Cited