한국펄프종이공학회:학술대회논문집 (Proceedings of the Korea Technical Association of the Pulp and Paper Industry Conference)
- 한국펄프종이공학회 2006년도 PAN PACIFIC CONFERENCE vol.2
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- Pages.325-329
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- 2006
Installing Ozone Bleaching and Hot Acid Treatment at NPI Mills
- Uno, Shunichiro (Nippon Paper Industries, Co, Ltd.) ;
- limori, Takeshi (Nippon Paper Industries, Co, Ltd.)
- 발행 : 2006.06.06
초록
Nippon Paper Industries, Co., Ltd. declared conversion of all the bleaching process to ECF, and most of the production had converted by now. To reduce ECF bleaching cost, we found that depending on electricity supply condition of the mill, utilization of ozone bleaching could be very effective. In addition, hot acid treatment of unbleached pulp also seemed to be effective for hardwood. In this study, several conditions for each technology were examined with the pulps from our own mills to reduce bleaching cost and to keep fiber quality acceptable level. In hot acid treatment study, with mild conditions (temperature lower than
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