| 摘要 |
<p>METHOD OF PROCESSING PRINTED WASTE-PAPER The present invention relates to a method of processing printed waste paper, in particular waste paper containing at least 80% newsprint or magazine paper by digestion, various cleaning steps, flotation or washing and disintegrating, the latter with a high consistency of at least 20%, and possibly bleaching. The invention is characterized by the fact that a final second disintegrating step, arranged possibly before a bleaching step, with treatment of the waste paper under strong kneading action of individual bar-shaped or blockshaped kneading elements of both the stator and the rotor of the disintegrating machine which are arranged in a kneading chamber thereof which is delimited by two concentric cylindrical surfaces, at temperatures between 20 and 110.degree.C and preferably 38 to 65.degree.C, and with a specific power consumption of between 30 and 100, and preferably 80, kilowatt hours/ton oven-dried weight.</p> |
