Pioneer in Scandinavia

In the coastal region of Stockholm, the company Kentas Last & Schakt AB is taking a remarkable step into the future: The complete crushing and screening process is carried out there all-electrically – with a linked plant train from Kleemann, consisting of the jaw crusher MOBICAT MC 120 PRO, the cone crusher MOBICONE MCO 110 PRO and the screening plant MOBISCREEN MSC 953 EVO. The company thus becomes one of the pioneers in this sector in Scandinavia.

The range of applications is challenging: Kentas Last & Schakt AB processes mainly granite and recycling material. The feed material therefore varies greatly, which means that the machine settings have to be adjusted frequently. The company decided on a plant train consisting of three Kleemann machines: From the jaw crusher, the crushed material with a grain size of 0–150 mm reaches the cone crusher, then, with a size of 0–60 mm, it reaches the mobile classifying screen where it is separated into three grain sizes: 0–16 mm, 16–32 mm and >32 mm.

All-electric – out of conviction

However, there is one difference compared to (previous) traditional plant trains: The complete train operates only on electricity. “Our decision to go fully electric was motivated by energy-saving considerations and the desire to reduce emissions," explains co-owner Freddie Erickson.

The electrically driven plant train scores points not only in terms of sustainability. The investment also pays off economically: “The operating costs for an electric power supply are about half those for diesel,” says the entrepreneur happily. The processes have also been simplified: No daily refueling, no warm-up time, and even maintenance has become easier; the electrical systems have proven to be more reliable.

Of course, the changeover did not come without financial and logistical costs: Kentas Last & Schakt AB invested a high 6-figure euro sum in infrastructure measures, including a transformer station and underground cables. There was no state funding. But the location conditions were so good that the project could be mastered.

Robust technology for demanding materials

The plant train scores points not only in terms of sustainability. The processes are also state-of-the-art. Automatic line linking guarantees a trouble-free work process: The machines communicate via fill level sensors and regulate their output: The upstream machine, for example, reduces the feed when the downstream machine reports a high fill level. This ensures that production runs smoothly and efficiently, with maximum safety. If an emergency stop is activated anywhere on the train, all machines stop simultaneously.

SPECTIVE CONNECT is used for operation on site. This allows machine data and settings to be conveniently viewed and adjusted via smartphone – safely and efficiently, without having to be directly at the plant.

Conclusion: Change continues to be driven forward

The experience with all-electric operation has been entirely positive. Although implementation initially involved costs and time, the advantages outweigh these factors: Lower operating costs, easier maintenance, and greater efficiency. Due to the positive results, Kentas Last & Schakt AB is already planning to electrify additional machines. “We are actively working to convert as many machines as possible to electric power. This is clearly the way forward, and we are determined to implement this change across our entire fleet.”

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