Modern Quarrying Q4 2018

Liebherr Africa has locally developed its DBP 60-M, a fully automated mobile dry batching plant that sets new mobility standards.

It features a four-compartment aggregate storage system of up to 50 m³, with a weighing conveyor belt, cement and admixture scales, as well as a water dosing mechanism to accurately batch the material.

The key design features considered a number of operational parameters, but mainly low maintenance costs, cost-effective transportation, quality of concrete and reduced installation time and cost.

weighing principles as a wet plant, but without the wear and tear of an integrated mixer as the plant discharges directly into mixer trucks. This is comple- mented by Liebherr’s fleet of truck mixers already configured for dry batching. “The DBP 60-M offers the capabilities of a wet batch plant. However, we removed all the unnecessary features found on wet batch plants. 90% of local customers use only about 40% of the wet batch plant’s capabil- ities. This translates into a lower upfront costs, as well as reduced

automatically and send the ingredi- ents into a central integrated mixer where they are mixed to make concrete, which is then discharged into a truck mixer. However, the downside to this approach is that the mixer endures wear and requires ongoing maintenance. “Typical mobile dry plants have a rudimentary system which requires manual weighing of ingredients. This can be less accurate compared with wet batch systems, but the maintenance costs are lower on the plant by not having a mixer in the equation,” explains Van der Merwe. The DBP 60-M offers the same

and invoices can be generated by the system, if required. By being a mobile platform equipment, the plant is self-contained, enabling cost-effective transportation,” explains Van der Merwe. Theoretically, Greyling explains that Liebherr Africa expects the plant to produce 60 m³/hour of concrete. However, in reality, the company expects 53-55 m³/hour, depending on good logistics and setup. Explaining the difference between dry and wet batch technology, Van der Merwe says wet plants weigh material

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QUARTER 4 - 2018 MODERN QUARRYING