Amandus Kahl

AMANDUS KAHL is a medium-sized family-owned company managed by its proprietors. It was founded in 1876 as a manufacturer of mills and pelleting presses. Today, we look back on more than 125 years of machine and plant construction.

Around 1920, the extrusion press was designed, patented, and sold worldwide. In 1920, the first pelleting press was delivered – the forerunner of the flat die pelleting press which has been constantly improved to this day. KAHL plan, design, and build machines, plants, and turnkey production factories for conditioning and compacting of many different products for a wide variety of industries. The flat die pelleting press and the annular gap expander are the most successful products of KAHL.



Possible applications of the KAHL pelleting press: Wood waste, wood shavings, wood chips, sawdust, wood and grinding dust, straw, miscanthus, bagasse and other biomass.

A Convincing Technology

For decades, KAHL pelleting plants have been applied successfully for compacting organic products of different consistency.

Do you need constantly uniform, optimally compacted pellets? Our presses are able to produce pellets of 2 to 40 mm in diameter. The KAHL pelleting presses process also materials which are difficult to compact:

  • Powdery, fibrous, lumpy and pasty substances
  • Substances with different particle sizes, moisture, and bulk density

The product is formed into endless strands at a high throughput which are precisely cut by means of knives. With a roller speed of only 2.5 m/s an optimum deaeration of the product is achieved. The plants are extremely silent with a noise level of less than 70 dbA. 12 types of pelleting presses are available for different applications.

Flexible • Easy to use • Low maintenance

Intelligently Controlled

For gentle drying of wood shavings and wood chips we have developed special belt driers ensuring:

  • Optimum product quality
  • Economic operation

The plants which are individually composed of modules ensure convectional drying using hot air. Thanks to an intelligent control system, the KAHL fabric belt drier adapts to varying moisture degrees and climatic conditions. Depending on the demands, ambient air or recirculated air with a temperature of up to 200 °C are used in KAHL belt units. Inert gas designs avoid emissions and dust explosions.

Our fabric belt made of special plastic serves not only for transport but also as an exhaust air fan. The drying plants are also suited for high throughputs at automatic operation.

To Prepare Quality Pellets

Wood shavings, sawdust, wood chips, and other lumpy biomass raw materials are crushed in an eco-friendly way using the KAHL pan grinder mill:

  • With a minimum energy consumption
  • Silent operation
  • No ATEX problems
  • Without aspiration system, cyclone, filter and exhaust air plants

Optimum crushing of raw materials!

The mill can be designed for capacity ranges from a few hundred kg up to 20 t/h and does not need much space. Both dry and wet raw material is processed.

KAHL pan grinder mills defibre wet wood chips of the categories G30 and G50. Subsequent fine grinding with conventional hammer mills is not necessary.

A Clean Solution

A high quality awareness establishes KAHL on the wood pellet market. For more than 30 years Kahl has dealt with this product and can offer a sophisticated process for the production of high-quality pellets with very good combustibility, now.

  • Clean cut
  • Low dust content
  • Highly compacted

Robust design and a high availability of the plant ensure economic operation. KAHL pelleting presses are available with a drive power of 3 kW to 500 kW and a throughput of 300 kg/h to 8 t/h.

We offer our customers assistance in obtaining approval, planning, engineering, commissioning, and after-sales service. Our pilot plant is available to our customers for tests with their products.

Compact Energy

Pelleting of renewable raw materials for energy recovery has been a topic for KAHL for more than 30 years, after receiving corresponding research assignments following the energy crisis in the 1970’s. Straw and dried forage pelleting plants have formed part of our delivery programme since then, too. So, we can rely on long-standing experience.

The worldwide energy and resource consciousness has increasingly moved materials into focus which have been unexploited so far, such as straw, rape straw, or by-products from cereals and pulses. Pellets offer enormous advantages, e.g. for thermal utilisation:

  • High bulk density
  • Practically dust-free
  • Easy to store
  • Easy to transport

Waste tyre granulates with a high purity degree

With KAHL flat die pelleting presses the product is ground to a particle size of 0.4 to 0.6 mm. Our company has decades of experience in the compaction and pelleting of raw materials. This process ensures effective and economical granulation of difficult products such as waste tyres – completely without nitrogen.

The flat die pelleting presses are characterized by their sturdy construction and their high flexibility. Granulation presses for waste tyres achieve a throughput of 2.5 t/h in three-shift operation.

Compact Energy

Waste belongs to the category of the most difficult materials to be processed. With KAHL plants municipal and industrial waste can be transformed into valuable alternative fuels.

Seven million tons of municipal waste can be processed into about three million tons of alternative fuels with a caloric value of abt. 17,500 KJ/kg. They are used as an important energy source in the following sectors:

  • Iron extraction
  • Power stations
  • Production of the synthesis gas methanol
  • Cement industry

Adaptable Technology

Compacted and dust-free municipal and industrial sewage sludge can be treated further at low costs. KAHL sewage sludge pelleting provides:

  • Easy transport
  • Use as cover material in landscaping
  • Well-suited quality for thermal utilisation

After an appropriate pre-treatment, the solid content of the sewage sludge is between 60 and 95 %. By means of the pan grinder rollers it is ground and compacted on the die. The bulk density of the pellets is about 800 kg/m³.