Context
Where slots matter in paper
Pressure screens in the approach flow system filter pulp before the headbox. Slot opening drives the cut size of fiber bundles and contaminants. A drift of a few microns can change the sheet formation profile.
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Pulp & Paper
Paper quality is screen quality.
In pulp and paper, the screens used in headbox approach systems, screen baskets and pressure screens directly drive sheet uniformity. Slot precision converts into incoming-audit-visible product quality.
Challenge
The hidden cost of screen drift
Mills run for weeks before a screen change. A degraded screen produces sheet defects that show up downstream, sometimes weeks later. Diagnosing the cause is expensive.
Solution
CTRL+ in paper
Incoming inspection of new screens. Periodic measurement of returning screens in the workshop. Statistical correlation between screen quality and sheet defects becomes possible.
Applications
Where CTRL+ fits
- Pressure screen baskets
- Headbox approach screens
- Pulp cleaning and fractionation
- Recycled fiber processing
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