METHOD FOR PREPARING PAPER PULP FROM RECYCLED PAPER CONTAINING CONTAMINANTS

摘要

The invention relates to a method for preparing paper pulp from recycled paper containing contaminants characterized in that it comprises a first step of agitating the paper in the presence of water in order to obtain a mixture of fibres and contaminants in suspension, a second step of coarsely sieving said mixture in order to separate the coarse contaminants from the rest of the suspension, a third step of fine sieving in order to separate the fine contaminants from the coarsely-sieved suspension and a fourth step of washing said coarse and fine contaminants in order to separate the reusable fibrous materials from the rest of the non-reusable contaminants. In particular, the invention aims to provide a method for preparing paper pulp that is capable of producing a good quality paper pulp from highly-contaminated recycled paper, especially having a contaminant level in the dry state that is greater than or equal to 15% by weight.