LIEBHERR has launched its latest batching plant generation after a mobile version went into operation for a+b Asphalt- und Betonmischwerke in southern Germany.
The new Betomix and Mobilmix batching plant series can be put together from a modular system. Liebherr said customers benefit from ‘more configuration options, shorter lead times, faster assembly and high parts availability’.
a+b Asphalt- und Betonmischwerke is a producer of ready-mixed concrete, asphalt, gravel, sand and chippings at various locations. The company was equipped with a Mobilmix 3.0 concrete batching plant from the new Liebherr system, which has gone into operation in Bad Waldsee. The plant is said to deliver up to 130m³ output per hour with the Liebherr DW 3.0 twin-shaft mixer. Up to 210m³ of aggregates can be stored in a total of six chambers. Four types of cement or binder totalling up to 400 tonnes are stored in the cement section.
Liebherr explained that the new plant requires up to 30 % less energy than previous versions, while the necessary electricity supply can be lower because power peaks can be avoided. This is achieved by frequency converters for the drives on the mixer and feeder elevator. The soft start and soft stop of the drives reportedly reduces wear and tear on the mechanical parts, while the frequency converter means the speed of the twin-shaft mixer can be changed during the mixing process and adapted to the recipe.
The frequency converters are described as enabling an accuracy of +/- 0.5 % when metering cement. With a typical recipe with 300kg of cement per cubic metre of concrete, Liebherr revealed that up to 7.5kg of cement can be saved.
The new concept is based on a modular design. Individual modules can be planned and manufactured independently of each other and combined with other modules. They are almost completely wired and fully assembled at Liebherr facilities. After testing, the modules are delivered as complete transport units to site.
Liebherr added that the module dimensions are ‘optimised’ and are maximum three metres wide. Due to a folding concept and plug connections, the modules can be quickly assembled.
All accessible areas of the batching plant are said to be ‘generously’ designed. There is also space for the arrangement of additional containers, such as for steel fiber dosage. A chain hoist can be installed on the balance scaffold, which can be used to lift Euro pallets with loads of up to 1,000kg to the appropriate working level through the material hatches.
All stairs and steps are 1,000mm wide as standard. The new mixer high pressure cleaner ‘LiClean’, together with the ‘creep speed’ cleaning mode, is designed to enable ‘optimum’ cleaning results with a ‘high level’ of safety, the manufacturer added.
