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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Studies on the recycling of sludge originated from a copy paper mill by calcination

백상지 슬러지의 소성처리에 의한 재활용에 관한 연구

  • Cho, Jun-Hyung (Dept. of paper Science and Engineering, College of Forest Environmental Sciences, Kangwon National University) ;
  • Choi, Yun-Sung (Dept. of paper Science and Engineering, College of Forest Environmental Sciences, Kangwon National University) ;
  • Park, Kyo-Heoun (Dept. of paper Science and Engineering, College of Forest Environmental Sciences, Kangwon National University)
  • 조준형 (강원대학교 산림환경과학대학 제지공학과) ;
  • 최윤성 (강원대학교 산림환경과학대학 제지공학과) ;
  • 박규현 (강원대학교 산림환경과학대학 제지공학과)
  • Received : 2010.02.01
  • Accepted : 2010.03.09
  • Published : 2010.03.30
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Abstract

Paper industry in Korea produces 14 million tons of paper and 1.3 million tons of sludge per year. Most of them has been treated by incineration, landfilling or ocean dumping. The sludge recycling to minimize the impact on the environment, so its importance is highlighted. In this study, in order to develop a new way of recycling the sludge, it was calcined and the recycled ash was tried to use as papermaking filler. Concerning the yield of calcium carbonate and the brightness and the rheology of the recycled calcination sludge, the optimum calcination conditions were found to be $600^{\circ}C$ and 12 hours. The sludge ash itself was not suitable for papermaking due to its color and low brightness. Thus the ash from the sludge was first mixed with a commercial filler and then utilized for papermaking. The effect of the increased hardness after high temperature treatment on wire abrasion was confirmed.

Keywords

References

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