Home \ International \ Liebherr-Mobilmix supplies quality concrete for the wind industry
Liebherr-Mobilmix supplies quality concrete for the wind industry
02/09/2024
Pubblicato da Redazione
Enercon Emden originally purchased a Liebherr Kombimix 2.25 in 2005 for the production of concrete tower segments.
During the conversion of the existing Kombimix mixing plant at Bettels Betonfertigteile GmbH, it was necessary to ensure that the production halls were reliably supplied with fresh concrete throughout the entire conversion work. A consistently high product quality had to be guaranteed before, during and after the conversion. Bettels Betonfertigteile GmbH attaches great importance to sustainability and environmental protection. Against this background, investing in modern technologies for efficient production processes and the responsible use of resources were not on the agenda. When selecting a bridging system, it was important to be able to use the system flexibly for other construction sites at a later date. The time and cost-efficient realisation of the system was therefore an important argument.
Based on these requirements, a Liebherr Mobilmix from the new plant generation was chosen to bridge the conversion period. The Mobilmix was the ideal choice for this task due to its short and cost-effective assembly. The innovative folding concept combined with pre-cabling ex works enables quick installation and commissioning. Thanks to the design with a steel foundation, lateral supports and anti-slip plate covering, no concrete work is required. A simple, level, compacted floor is sufficient for installing the Mobilmix. This concept enables the mixing system to be moved quickly and easily. After the bridging operation, the system is immediately available for other operations.
When developing the new Liebherr Mobilmix, great importance was attached not only to fast assembly but also to high flexibility and sustainable concrete production. The modular design of the Mobilmix series offers a wide range of options that can be flexibly customised to the customer's needs. Another important innovation of the modern system is the smoothing of electrical power peaks. This is achieved through the use of frequency converters and their LiPerformance parameterisation, which intelligently start up and control all the drives in the system. Switching to the new Mobilmix therefore results in potential energy savings of up to 30 percent. In addition, the precise dosing of the cement with an accuracy of +/- 0.35 percent enables efficient use of resources and ensures both economical and sustainable concrete production.
The centrepiece of the new Mobilmix mixing plant is the RIV 2.5 ring-pan mixer, with which it is possible to produce 100 m³ of self-compacting concrete per hour in a short mixing time. The frequency-controlled agitator enables the production of the highest strength classes with short mixing times. This means: The speed of the double agitator can be adjusted independently of the main agitator. Incidentally, this highly efficient RIV 2.5 ring-pan mixer is also to be installed during the conversion of the existing system. The inline silo has a total storage volume of 140 m³, which is divided into five compartments for the aggregates. Four cement silos, each holding 120 tonnes, were set up for cement storage. A high degree of mobility was also taken into account here with the construction on steel foundations. The cement screws can be transported in one piece and thus assembled and disassembled within a few hours if required. In addition, the mixing plant is fully enclosed for winter use and equipped with a LiClean high-pressure cleaning system and a MPS 3 plant control system.
Thanks to the folding concept with pre-cabling ex works, the Mobilmix could be installed extremely quickly and cost-effectively. After two weeks, the Mobilmix was ready for use and the conversion of the existing Kombimix could begin immediately.
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