June 7, 2016

Official commissioning of the quicklime mixing plant at MSW Mineralstoffwerke Südwest in the Mönsheim quarry

Official commissioning of the quicklime mixing plant with the BHS twin-shaft batch mixer at its core. Pressing the start button: Benedikt Fahrland, Managing Director at MSW, and Undersecretary Martin Eggstein greeted by Benedikt Fahrland, Martin Eggstein, and Kai Fischer (from left to right) MSW Managing Director Benedikt Fahrland explains the environmentally friendly technology Visitors are taking a closer look at the twin-shaft batch mixer of type DK 4.5 with customized equipment Feeding in rock with clay residuals to the twin-shaft batch mixer Quicklime mixing plant at MSW Mineralstoffwerke Südwest Strong visitor turnout for the official commissioning Tour of the quicklime mixing plant

At an event themed ‘slaking clay-containing pre-filtered materials by mixing in quicklime,’ MSW Mineralstoffwerke Südwest GmbH & Co. KG presented and officially commissioned the quicklime mixing plant in the Mönsheim quarry on Saturday, 4 June 2016.

Managing Director Benedikt Fahrland kicked off the event at 10 a.m. and held a speech to welcome the 70+ invited guests. In their welcoming addresses, Martin Eggstein, Undersecretary of the Baden-Württemberg Ministry of Environment, Climate and Energy and Mr. Kai Fischer from the Industrieverband Steine und Erden Baden-Württemberg e.V. (ISTE) called upon the construction industry to use raw materials more efficiently and sustainably. The feedback from those in attendance at the event was extremely positive.

Benedikt Fahrland, Managing Director at MSW, recounted the history of the quicklime mixing plant and explained its environmentally friendly technology during his opening words. Several times, he explicitly mentioned that this innovative idea was developed by BHS-Sonthofen.

The Mönsheim gravel mill produces nearly 400,000 metric tons of different aggregates and construction material mixes every year. In the past, the results from processing the shell limestone with its high clay contents were less than satisfying. The extracted material previously remained in the quarry because conventional methods of processing were not effective. The twin-shaft batch mixer of type DXKS 4.5 from BHS-Sonthofen proved to be capable of slaking the clayey impurities using the correct mixture of quicklime, making it possible to separate the undesired clay from the rock. In the new process, the clay-containing shell limestone is transformed into pure gray shell limestone, thus increasing the yield of the production facility. The savings are substantial in terms of water, energy and material costs owing to the dry process. It was possible to cut costs of resources by 30% when extracting shell limestone. This means that 30% less material needs to be extracted and 20% less energy is required overall. The CO2footprint can be reduced by approximately 30 metric tons per year.

The Federal Environment Ministry awarded a €150,000 investment subsidy to this project as part of the ministry’s innovation program due to the project’s first-time use of this innovative and resource-conserving technology in a large-scale endeavor.

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