ヨーロッパの古紙事情と古紙処理設備

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タイトル別名
  • European Wastepaper and Waste Paper Processing Systems
  • ヨーロッパ ノ コシ ジジョウ ト コシ ショリ セツビ

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抄録

In order to explain the situation of wastepaper in Europe the development in Germany which led to waste paper recycling rates of 60 is taken as a reference. Laws issued in the early 1990'ies created the economical need to recycle wrapping and packing materials and forced the industry to set up an efficient collecting system. Threatened by a similar law as for the wrapping and packing materials the manufacturers and users of graphical papers issued a free will declaration to increase the use of waste paper for the manufacture of such papers. The goal of a recycling rate of more than 60% was achieved already in 1994, 6 years earlier than initially intended.<BR>The description of waste paper systems is separated for brown and white paper grades. Beginning with the standard components for the slushing and precleaning stages for brown paper grades several machines and equipment required for such systems are being introduced. Also an alternative system for the preparation of testliner stock which uses an high consistency slushing stage and reduces the required number of machines dastically is described.<BR>With the increased use of waste paper for the manufacture of newsprint, light weight coated or super calandered papers process steps like flotation machines, fine slotted screens and diskdispersion have become the critical points in a stock preparation system deciding about the quality of the final stock or the runability of the papermachine. Therefor, when describing the standard DIP process for Newsprint paper, the main focus is put on the ECO -cell flotator and the C-Bar type fine screens, By simply adapting single process steps this standard system is also able to produce DIP stock for higher paper grades of for tissue paper. When extended with a third flotation stage the system is even able to handle mixed office wastepaper and produce a stock which can be used as virgin pulp replacement. When combined with the correct reject handling system and a counter washing water cycle the freshwater consumption of a paper mill manufacturing newsprint paper out of 100% DIP stock can be kept below 10m3 water per ton paper.

収録刊行物

  • 紙パ技協誌

    紙パ技協誌 51 (7), 1015-1031,014, 1997

    紙パルプ技術協会

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