High- and medium-consistency screening

Applications for broke screening, thick stock screening, and protection screening before refining.

Maximum cleanliness with minimum costs

Small debris in the approach system can cause quality problems, like coating streaks or other visual defects, and production problems such as web breaks. Thick stock screening removes impurities before they can enter the paper machine approach system. With high-consistency screening, all the stock components entering the machine chest are screened with narrow slots of 0.15-0.25 mm.

Protection screening

ModuScreen CP

Coarse and fine screening

ModuScreen C&F

Fine screening

ModuScreen F

Benefits of thick stock screening and broke screening

Screening with narrow slots at high-consistency area reduces system and pumping volumes
Removing the debris and impurities with thick stock screening leads to considerable cost savings in headbox screening
Narrow slots give the highest screening efficiency
Flexible basket/rotor combinations allow easy and quick adaptations for all the different raw materials and applications
Optimized rotor dilution options and intermittent rejecting in the tailing screen allow the highest yield and lowest losses of good fibers

Benefits of protection screens - screening instead of high density cleaners

Screen cylinders with 4–5 mm holes are an efficient method to stop the bale wires, stones, and coarse debris destroying expensive refiner plates
High-consistency screening with consistencies up to 5% allows the optimum process conditions for LC refining
Intermittent reject removal leads to high yield and minimum good fiber loss

ANDRITZ stock preparation screens

ModuScreen CP: protection screen before refining for separation efficiency at high consistencies
ModuScreen C&F: combines effectively coarse and fine screening operations in one compact unit
ModuScreen F: thick stock and broke screening applications with high reliability and flexibility for all applications

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Stock preparation and RCF

Enhanced ﬁber quality with economical use of resources.