High- and medium-consistency screening

Protection screening before refining and thick stock screening

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

  • Screening with narrow slots at high consistencies 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 adaptations for different raw materials and applications
  • Optimized rotor dilution options and intermittent rejecting in the tailing screen allows 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

Find out more ...

Contact us
Pulping and Fiber
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