WALW Solutions
Raw materials

Sawdust pellets

The most common raw material in sawmills and joineries. Fine, dusty sawdust goes straight into the granulator without grinding.

Wet sawdust is bought by loose volume, dry sawdust by weight. Above 15% moisture the line needs a dryer; sawdust from a sawmill kiln often goes in without one. Around 700 m³ of loose sawdust per month gives around 100 tonnes of pellets.

What you need to know

Grinding
not needed for a fine fraction
Typical moisture
above 15%, a dryer is needed
Die
die for softwood, 6 or 8 mm holes
Conversion
approx. 7 m³ of loose raw material = 1 t of pellets
Sawdust

A pellet line for this raw material

Two lines to start from, and below them the production stages: which ones this raw material needs and which machines do the job.

  1. Feed hopper needed

    Takes in the raw material and feeds it evenly into the line.

    Feed hoppers with a screw discharger (V-shaped walls), Feed hoppers with a slat scraper (vertical walls)

  2. Grinding not needed for this material

    Fine, dusty material goes straight on, without a grinder.

  3. Drying needed

    Above 15% moisture the line needs a dryer, sized to the amount of material.

  4. Pelleting needed

    The heart of the line. For this material: die for softwood, 6 or 8 mm holes.

    Granulators

  5. Cooling it depends

    Needed from about 200 to 250 kg/h. It can be skipped with big bags, not with small bags.

    Coolers

  6. Screening needed

    A drum or vibrating screen separates dust from the finished pellets.

    Drum screens, Vibrating screens

  7. Packing your choice

    15 kg bags, big bags or bulk, depending on the buyer.

    Packaging systems

  8. Transport between stages needed

    Belt and screw conveyors connect the machines into one line.

    Belt conveyors, Screw feeders, Redlers

  9. Control cabinet needed

    Controls the whole line, also remotely from a phone.

    Industrial automation

Other raw materials

Test your raw material before choosing a line

Send a sample and see what pellets we can make from it. We test the material on our pellet mills and give you recommendations on the die and the choice of machines.

  1. You fill in the request, we call back and agree how much material to send (usually 2 to 3 bags).
  2. We pelletise it on the test line in Sieradz; you are welcome to watch.
  3. You receive a pellet sample and a report with a recommended die and line set-up.
The test is free for companies considering a WALW line.