ANDRITZ offers a broad range of innovative recycling technologies for material separation and recovery, treatment of various types of waste and rejects from the paper industry, and the production of renewable energy. In addition, ANDRITZ is a leading supplier of plants based on Bubbling Fluidized Bed (BFB) and Circulating Fluidized Bed (CFB) technologies for boilers, which are ideal for a wide range of combustion applications.

Processing of various kinds of wood

ANDRITZ offers shredding technology for the processing of different kinds of woods, such as wood offcuts, veneers, boards and waste wood. The slowly rotating ANDRITZ FRX and FRP shredders process large quantities of wood into manageable sizes from 10 to 200 mm. The size of the output material is determined by the screen size used. The hydraulic pendulum feeder and the optimal knife geometry suited for various materials yield perfect continuous cutting and high throughput of up to 50 t/h.

Process advantages of the FRX and FRP shredders:

  • Innovative cutting system: Continuous cutting performance for high throughput
  • Superior pusher technology: Avoids material extraction
  • Service door: Quick and easy access for maintenance
  • Innovative reject hatch: efficient cleaning of the cutting area
  • Optimal knife geometry for various materials with lower and higher knife holders
  • Large inlet hopper
  • Heavy-duty machine construction for maximum resistance
  • Automatic security locking
  • Insensitive against impurities
  • Optimized protection clutch
  • Easy integration of the shredder into an existing plant


ANDRITZ shredder FRX
ANDRITZ shredder FRP


ANDRITZ Recycling

Fluidized bed technology: Decades of experience go into every ANDRITZ fluidized bed boiler

ANDRITZ is a leading supplier of plants based on Bubbling Fluidized Bed (BFB) and Circulating Fluidized Bed (CFB) technologies for boilers. These different technologies are distinguished by capacity, fuel, and application. Excellent mixing and heat transfer make
fluidized bed technology ideal for a wide range of applications. A variety of coals and lignites can be combusted, as well as clean biomass (bark, agricultural, forestry, and sawmill residuals) and many other fuels (demolition wood, refuse-derived fuels, peat, various sediments, etc.).


EcoFluid – BFB technology
In a BFB unit, fuels are thoroughly mixed in a dense suspension of fluidized bed material in the lower furnace. BFB systems operate at a moderately low fluidization velocity and under controlled temperature conditions. Thanks to the large heat capacity of the fluidized bed material, which is mostly sand, the combustion conditions are ideal for biomass and recycled fuels with varying moisture contents. In many installations, mixed fuels are fired simultaneously.

PowerFluid – CFB technology
With CFB technology, the flue gas velocity in the furnace is higher and the bed is expanded and entrained with the flow. The bed material flows with the flue gas through the furnace, after which the material is separated by cyclones and returned to the lower furnace. CFB technology also allows an extremely wide range of fuels to be fired in the same unit. The efficient mixing and relatively low combustion temperatures contribute to low emissions of carbon monoxide, hydrocarbons and nitric oxides.

Advantages of ANDRITZ fluidized bed technologies:

  • Fuel flexibility
  • High burn-out and conversion rates
  • Inherently low emissions
  • Excellent availability, with long continuous operating periods
  • Operational flexibility, with good load following capability
  • Minimal maintenance
  • Proven design


Thomas Strasser 
ANDRITZ Power Boilers
Waagner-Biro-Platz 1
8074 Raaba-Grambach
Ph.: +43 (316) 501 328

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