Barrier and probability screening If the particles to be separated are larger than the screen aperture in all three dimensions the process is called “barrier screening”. Barrier screening occurs mainly in coarse screening with holes as apertures and very large or rather spherical or cubical contaminants. Barrier screening has a clear cut size and every
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Barrier and probability screening
Content
Recycled fibre
- Legislation
- Sources and quality of paper for recycling
- Recyclability of paper and board products – Deinkability
- Recycling versus recyclability
- Technical aspects of recycling
- Relevance of recyclability
- Repulpability and deinkability
- Deinkability test methods
- EPRC deinkability assessment
- Deinkability of different printed products
- Removability of adhesive applications
- EPRC assessment on removability of adhesive applications in graphic paper products
- Unit operations and equipment in recycled fibre processing
- Design of processes
- Design principles for stock preparation processes
- Process design for graphical grades, news print
- Process design for tissue
- Process design for board and packaging grades
- Reject and Sludge handling for graphical and tissue applications
- Reject and Sludge handling for board and packaging applications
- Water management
- Additives
- Deinking
- Bleaching of deinked pulp
- Process water treatment
- Sticky control – detackification
- Enzymatic solution for recycled fibres
- Papermaking potential of recycled fibre
- Differences between virgin and recycled fibre
- Repeated (manifold) recycling experiments
- Multiple papermaking with recycled fibres
- Modelling of fibre age distribution
- Special request of recycled fibre furnish in papermaking
- Effects of recycled fibre in papermaking
- Challenges of increased recycled fibre utilisation
Authors & references
Author:
Professor Samuel Schabel, TU Darmstadt
References:
- O. Heise, B. Cao and S. Schabel: “A novel application of TAPPI T 277 to determine macro stickies disintegration and agglomeration in the recycle process” In: TAPPI Recycling Symposium, Washington, D. C., 2000, TAPPI press, p. 631 – 644, ISBN 0-89852-960-3.
- S. Schabel, P. Respondek: “Sortierung – ein Werkzeug zur Sticky-Entfernung“ – In: Wochenblatt für Papierfabrikation Vol 125, No. 16 (1997), p. 736 – 739.
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This page has been updated 17.11.2021
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