# TYPE: Kraft Liner Paper Making Line TIME: 2017-10-17
The paper material containing a small amount of small fiber bundles, fine sand, fine iron and other heavy impurities, must carry out sand removing purification treatment, in order to reduce the paper dust degree, improve the quality of paper.
Working Principle of Paper Pulp Cleaner
The slurry along the tangential direction into the desander, do spiral movement under pressure. Because of the different mass, the centrifugal force is different when rotating, thus separating the fibers and impurities.
Paper pulp slag cleaner is to separate the relative density of some heavy impurities (such as sand, metal particles, etc.) with fine fibers, and use different purification equipment to separate them by gravity sedimentation or centrifugal force.
The paper pulp screening equipment is the use of different size and geometry of some impurities (such as large fiber bundles, plastic foam, etc.) between fine fibers to uses different screening equipment to separate the static pressure or dynamic pressure difference produced by slurry.
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