References

KORN Recycling GmbH is a certified waste management specialist based in Abstadt/Germany, with seven additional locations. KORN focuses primarily on the recycling and recovery of waste from commercial, industrial and domestic sources. To this end, the company operates one of the world’s most modern commercial waste sorting and substitute fuel processing plants.

In 2026, UNTHA’s new high-performance shredder – the SR3000XC – was installed in KORN Recycling’s existing processing plant. This powerful single-shaft shredder serves as a secondary shredder to process pre-sorted material but can also be used for other material streams and output fractions. With a rotor speed of approx. 250 rpm, an impressively high throughput of up to 14 t/h is achieved with an output fraction of < 25 mm. The shredder, or rather the entire plant, operates six days a week in multi-shift operation. Consequently, high machine availability was one of the most important decision-making criteria. This is ensured by the shredder’s robust construction.

Further technical features provide high user-friendliness, low OPEX and maximum machine availability:

• A safety clutch protects the cutting unit from damage in the event of foreign objects entering the system,
• the central lubrication system and easy maintenance access facilitate work on the machine, and
• reversible cutting plates and stator bars that can be used four times reduce wear part costs.
• Another advantage is access to the MyUNTHA customer platform: Where machine and process data can be viewed and optimised in real time to make processes more efficient and reduce costs in the long term.

The XC cutting unit has been tailored to the customer's specific requirements and features six rows of knives and 84 cutting tools to ensure optimal shredding. In conjunction with the 25 mm perforated screen, a homogeneous output material is produced. The cutting unit ensures optimal material feed, meaning the machine does not require a beam pusher – which in turn reduces maintenance requirements and, consequently, operating costs.

Another key factor in its success is the level monitoring in the hopper: a radar sensor ensures ideal feeding via the feed conveyor belt, thereby guaranteeing consistent utilisation and consistently high shredding quality.

“We are very satisfied with the quality and performance. The throughput is high, and the quality of the resulting substitute fuel is excellent. Our customers, particularly those in the cement industry, confirm that the material meets their requirements exactly. There are no anomalies, and the quality remains consistently at a very high level,” explains Alexander Korn, Managing Partner of KORN Recycling GmbH.

Two drive options – Power Drive and Eco Power Drive – are available for the SR-class shredders, depending on the application in which the machine is used. At this customer’s site, the shredder is driven by the asynchronous UNTHA Power Drive: it is particularly energy-efficient, low-maintenance and enables high throughput rates thanks to load-dependent speed control.

“In the new SR class, complex processes have been reduced to the essentials. As a result, these shredders feature a very simple yet efficient machine design, ensuring low maintenance requirements, maximum availability and peak performance.” − Christian Lanner, Head of Research & Prototyping