Clay-and-rock mixtures

Innovative process improves raw material efficiency

Increasing the yield in quarries

Our innovative Combimix process turns clay-and-rock mixtures found in quarries and gravel pits into a valuable building material and marketable product. Before development of this process, these mixtures had to be backfilled or disposed at a landfill. Furthermore, this means that millions of tons of material that used to be considered worthless, and that was dumped in the past, can now be ‘reactivated.’ This innovation makes it possible to significantly reduce the amount of clay-and-rock overburden and thus allows quarries to operate more economically. During the mixing process, binder is added to the overburden material, which reacts chemically with the clay and dries it. In the subsequent processing step, the clay is separated from the rock by means of screening. This is where the innovative Combimix system (DKXC) takes center stage. Moreover, the new process conserves limestone resources and extends the usable lifetime of quarries.

Benefits at a glance:

  • Continuous mixing process with adjustable mixing time
  • Three-dimensional mixing principle
  • Consistently high mixture homogeneity
  • High throughput rates
  • Low wear

Video

BHS Combimix process for processing clay-and-rock mixtures in quarries

171012_BHS_Combimix-MSW-DREP2016_ENG_final - Original.mp4
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BHS Combimix process for processing clay-and-rock mixtures in quarries

This nomination video for the German Resources Efficiency Award 2016 introduces the BHS Combimix process for processing clay-and-rock mixtures at the Mönsheim quarry operated by MSW Mineralstoffwerke Südwest

BHS_Grafik_Combimix-System-Lehm.ai

Combimix system – Teaming up the advantages of the twin-shaft batch mixer with a continuous system

The innovative Combimix system of type DKXC combines the advantages of the twin-shaft batch mixer (DKX) with a continuously operating mixer. With conventional continuous mixers, the short retention time is not sufficient to achieve an adequate reaction between the rock mass and the lime. The decisive advantage of this mixer is its three-dimensional mixing concept. The retention time, which is dependent on the input material, can be varied flexibly. A weight detection system ensures a constant filling level.

Advantages compared to wet processing

  • No introduction of moisture into the aggregates
  • No wet sieving
  • No sludge processing
  • All materials are recycled, saving landfill space
  • Compact system – also available as a semi-mobile version
  • High level of rock reclamation
  • Possible to screen down to small fractions

Advantages compared to conventional continuous mixers

  • Continuous mixing process with configured mixing time
  • Low consumption of expensive burnt lime
  • Three-dimensional mixing principle
  • Consistently high mixture homogeneity
  • High throughput rates
  • Low wear

German Resources Efficiency Award 2016!

The Combimix process was awarded the German Resources Efficiency Award 2016 in Berlin by the German Federal Minister for Economic Affairs and Energy. BHS-Sonthofen and MSW Mineralstoffwerke Südwest jointly received this award for the development and successful implementation of the Combimix process.

Combimix processes (DKXC)

The reliability of the twin-shaft batch mixer coupled with the advantages of continuous operation

Combimix processes (DKXC)

The reliability of the twin-shaft batch mixer coupled with the advantages of continuous operation

Images

Tests give certainty

Which mixer is the right one for your application? Don’t leave anything to chance. Leave it to our team of process consultants. Working together with you, our specialists will test the material and develop a tailor-made solution for you.

Events

bauma CHINA 2020

24.11.-27.11.2020 | Shanghai (China)
Hall E7, booth 538

Hillhead 2021

22.06.-24.06.2021 | Hillhead Quarry Buxton (UK)
Booth B36

Intermat Paris 2021

19.04.-24.04.2021 | Paris (France)

bauma CONEXPO INDIA 2020

23.02.-26.02.2021 | Gurgaon/New Delhi (India)

bauma 2022

04.04.-10.04.2022 | Munich (Deutschland)

Satisfied customers worldwide

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