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

Korea Technical Association of the Pulp and Paper Industry (한국펄프종이공학회)
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Optimization of Repulping Process of Unsorted ONP for Pulp Mold (II) - Pilot trial -

  • Cho, Byoung-Uk (Chemical Biotechnology Research Center, Korea Research Institute of Chemical Technology (KRICT)) ;
  • Ryu, Jeong-Yong (Chemical Biotechnology Research Center, Korea Research Institute of Chemical Technology (KRICT)) ;
  • Fabry, Benjamin (Scientific and Technological Unit Deinking Processes, Centre Technique du Paper, Domaine Universitaire) ;
  • Song, Bong-Keun (Chemical Biotechnology Research Center, Korea Research Institute of Chemical Technology (KRICT))
  • Published : 2007.12.31
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Abstract

In order to utilize unsorted ONP, which contains leaflets (printed coated papers), as a raw material to produce pulp mold, optimum conditions for repulping were investigated with the pilot Helico pulper at Centre Technique du Paper (CTP), France. Two major process factors were focused: repulping concentration and rotor speed. Repulping at a higher concentration showed more rapid defibering kinetics. Increasing the rotational speed of rotor at the optimum repulping concentration accelerated the defibering kinetics while it also led to higher fines generation and faster decrease in drainage property of the produced pulp. Hence, an alternative way was suggested: starting repulping at a conventional rotor speed and then accelerating the rotor speed for the last minute(s) of repulping.

Keywords

References

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