Handling of pulper rags

Powerful shredding helps recover valuable raw materials from rags

Pulper rags are a very demanding compound of metallic and non-metallic components.

However, they are also an important source of secondary raw materials in waste paper recycling. ANDRITZ has the right shredding technology for treating the bulky rags and turning them into valuable fractions – ideally in a two-stage process.

up to 15 t/h


up to 800 mm


up to 15 m

rag length 

ANDRITZ PULP & PAPER – Pulper rags

See how rags turn into valuable fractions

For treating pulper rags, a two-stage process is recommended: First, the ANDRITZ Universal Rotary Shear UC reduces the size of the input material. Then, the ANDRITZ Universal Granulator UG – a fast-running shredder – cuts the material into very small particles.

This process stage perfectly loosens up the output material for subsequent removal of ferrous particles, resulting in a very clean metal fraction. Other separation technologies can be applied in order to recover more secondary materials, e.g. non-ferrous metals or substitute fuels.

Stage 1: Universal Rotary Shear UC

A slow-running, twin-shaft cutter reduces the size of the demanding input material by powerful pre-shredding.

Stage 2: Universal Granulator UG

A fast-running rotor cuts the pre-shredded material in interaction with the fixed stator knives to a size of less than 40 mm and loosens up the particles for further treatment.

As subsequent process step, an overband magnet is used to remove the ferrous particles – the remains of the steel wires used to hold waste paper bales in shape. The result is a metal fraction with very high cleanliness. Other separation technologies can be applied in order to recover more secondary materials, e.g. non-ferrous metals or substitute fuels.

Advantages of pulper rag treatment with the two-stage shredding technology from ANDRITZ

  • Turns waste into valuable secondary raw materials
  • Reduces the amount of rejects from waste paper recycling going to landfill
  • Generates high-quality fractions, e.g. ferrous metal
  • Versatile and effective cutting to the particle size needed for further processing
  • Entire process chain is available, from infeed to shredding technology, to precise separation of the fractions
recycling-input-rejects-pulper-rags (1)


  • Pulper rags



  • Substitute fuels
  • Plastics
  • Steel
  • Other metals
Output fraction RDF

Benefits: Pulper rags recycling

  • Applied process know-how from ANDRITZ ensures minimized operating costs with highly efficient process equipment
  • Single customer interface – entire system, all sub-processes and components from one source
  • Modular system designs allow tailor-made solutions for the specific waste streams
  • Highest cutting performance and capacity of the shredders
  • Extremely wear-resistant rotor, blade blocks and blades
  • Adjustable parameters for influencing the output quality and size
  • Clean output fractions
Contact us
Paper, Fiber and Recycling Division
Get in contact
  • pp-pulprecycled-rejectsystems-pulperrags.pdf
    Pulper rags - technical article

    ANDRITZ has developed a two-stage process for handling pulper rags that has already proven successful in many recycling plants.

    PDF : 1.2 MB
  • Universal Rotary Shear UC

    Wherever volume is to be reduced, waste prepared for incineration, or materials shredded for subsequent processing, the Universal Rotary Shear UC lays the foundation for a successful recycling process.

    PDF : 830 KB
  • Universal Granulator UG

    The Universal Granulators UG from ANDRITZ MeWa process a large number of different materials with mono-fractional results and convince customers particularly with their dynamic application and shredding results.

    PDF : 898 KB