Journal of Korea Technical Association of The Pulp and Paper Industry (펄프종이기술)

Korea Technical Association of the Pulp and Paper Industry (한국펄프종이공학회)
권호 표지
DOI QR코드

DOI QR Code

Effects of Inorganic Coagulants on Sizing and Contamination in Newsprint Mill

무기 응결제가 신문용지의 사이즈도와 공정오염에 미치는 영향

  • Received : 2015.06.10
  • Accepted : 2015.06.19
  • Published : 2015.06.30
Download PDF
⟨ Previous Next ⟩

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

References

  1. Honkasalo, J., Behavior of different furnish mixtures in mechanical printing papers, Dissertation of Doctor Degree, Forest Products Technology, Helsinki University, Finland, p. 9 (2004).
  2. Lee, J. K., Lee, C, K., Jeong, S. H. and Kim, C. H., Controlling contaminants and process stabilization by pitch control derived from thermo-mechanical pulp, Proceeding of Fall Conference of the Korea TAPPI, p. 91 (2013).
  3. Cho, M. H., Nam, Y. S., Jeung, J. H. and Kim J. M., Relationship physical and chemical properties of supports and performance of methane fermentation in anaerobic fluidized-bed reactor, Korean J. Biotechnol. Bioeng., (8)5:431 (1993).
  4. Park, D. S., Ryu, J. Y, Song, B. K., Seo, Y. B. and Sung, Y. J., Generation of hazardous gas and corrosion originated from anaerobic digestion of process water in OCC recycling mill, J. Korea TAPPI, 37(3):59-60 (2005).
  5. Ryu, J. Y., Shin, E. J., Song, B. G., Joo, J. H., Kim, J. H., and Jeong, S. H., Self sizing of TMP and Contamination of Paper Machines, 2012 Korea TAPPI Conference Proceeding, Korea TAPPI, Seoul, Korea, pp. 75-76.
  6. Hamzach, Y., Ekhtera, M. H., Hubbe, M. A., Izadyar, S. and Pourtahmasi, K., Effects of process variables on poly-aluminum chloride( PAC)-rosin sizing performance under neutral papermaking conditions, Ind. Eng. Chem. Res., 47, p. 4302-4307 (2008). https://doi.org/10.1021/ie800107x
  7. Van Benschoten, J. E and Edzwald, J. K., Chemical aspects of coagulation using aluminum salts-I. Hydrolytic reactions of alum and polyaluminum chloride, Water Res., 24(12):1519-1526 (1990). https://doi.org/10.1016/0043-1354(90)90086-L
  8. Jeon, C. H., Ryu, J. Y., Song, B. K., Seo, Y. B., and Jeong, S. H., An instance of selecting retention chemicals based on simultaneous analysis of retention, drainage and formation of RDA(Retention and drainage analyzer) Sheets, J. Korea TAPPI, 42(3):7-13 (2010).
  9. Shin, E. J., Choi, T. H., Song, B. K, Cho, B. U., and Ryu, J. Y., A new deposit test method to evaluate potential white pitch deposit-Influence of pH and calcium hardness, J. Korea TAPPI, 41(2):26-33 (2009).
  10. Leo, N. and Suomen, P. Y., Chemistry of aluminum in papermaking, In Papermaking chemistry, Leo, N. (ed.), Vol. 4, TAPPI Press, Atlanta, United states p. 107-109 (1999).
  11. Lee, K. P, Ryu, J. Y., Song, B. K., Jeong, S. H., and Park, J. M, Studies on the screening of fixing agent for deposit control ONP stock, J. Korea TAPPI, 42(3): 1-6 (2010).
  12. Douglas. D. S., Karen, R. S and Richardson, D. E, Evaluation of cationic polymers to control pitch deposition, Appita J., 63(3):199 (2010).