Wood Hammer Mills
We understand the requirements of the wood industry for our hammer mills and have the right wood mill for every input material and every desired particle size.
Modern Hammer Mills for Wood Grinding
Wood grinding plays a central role in numerous industrial applications – from pellet production and wood flour to energy generation. Hammer mills have established themselves as a particularly flexible and powerful technology.
Different grinding concepts are used depending on the type of wood, moisture content and desired final fineness. Modern hammer mill systems enable both dry and wet grinding with up to 60% moisture content and high process reliability.
Our Customers
Tell Us about Your Challenge. We´ll Find the Right Solution.
Briefly describe your requirements to us – we will listen, ask the right questions and develop a customised Tietjen solution for your application.
Objectives of Wood Grinding with Hammer Mills
The grinding of wood with hammer mills is a proven method for the targeted shredding of a wide variety of wood raw materials. The starting materials include wood chips, wood shavings, sawdust, wood sticks or pellets, which are processed dry or fresh from the forest, depending on the application. The aim is to produce defined particle sizes, for example for
- drying
- pelletising
- the production of wood flour
- or energy use
Which Hammer Mill for Which Wood
Hammer mills work on the principle of impact crushing. A rotating rotor with freely moving beaters crushes the wood material by impacting it against impact surfaces and screens.
The final grain size is mainly influenced by:
- The screen perforation (size and shape)
- The circumferential speed of the rotor
- The material properties of the wood
Hardwoods such as beech or oak differ significantly in their grinding behaviour from softwoods such as spruce or pine. These differences are already taken into account in the design of the plant.
Dry wood raw materials – high performance and precise grain distribution
For dry wood materials with low residual moisture, depending on the application
- High-speed hammer mills
- large-capacity hammer mills
are used
Moist materials – wet hammer mills for reliable operation
Wet hammer mills are used for moist or fresh raw materials, e.g. wood chips with high water content.
Their advantages:
- Special design to prevent blockages
- Less cleaning required during operation
- In many cases, no explosion protection measures are required
We Grind and Shred this Wood!
- Waste wood
- Fresh wood
- Wood shavings
- Wood chips
- Wood pellets
- MDF
- Wet wood
- Pallet wood
- Sawdust
- Chipboard
- Dry wood
Safe and Even Feeding
An essential component of modern wood grinding systems is the uniform and safe feeding of the mill. Feeding devices such as vibration feeders or dosing screws in combination with foreign object separators ensure a constant material flow and at the same time separate foreign objects such as stones or metals. This protects the mill from damage and increases operational safety.
The result: protection of the mill, less downtime and greater operational safety.
Explosion Protection During Wood Grinding – Protective Measures
Since explosive dusts can be generated during the dry grinding of wood, explosion protection plays a central role. Appropriate systems are designed in accordance with ATEX guidelines and equipped with preventive and structural protective measures. These include, among other things
- Temperature monitoring
- Spark-free designs
- Pressure-resistant housings
- and flameless pressure relief systems.
In addition, preventive fire protection is of great importance. Modern systems are equipped with spark detection and extinguishing systems that detect ignition sources such as sparks or embers at an early stage and automatically combat them. This is how safe wood grinding works.
Typical Next Steps
- Clarify requirements: We analyze your requirements and general conditions together
- Technical center trial: Trial grinding in our technical center with your material
- Project planning & quotation: Development of an individual plant concept and quotation
- Implementation: Delivery, installation, and commissioning by our experts
- After sales: Long-term support, spare parts, and maintenance with guaranteed availability
Tell Us about Your Challenge. We´ll Find the Right Solution.
Briefly describe your requirements to us – we will listen, ask the right questions and develop a customised Tietjen solution for your application.