Clay-and-rock mixtures

The cost-effective alternative to wet processing of clay-and-rock mixtures

Functional principle of the Combimix system (DKXC)
Illustration of the functional principle of the Combimix system (DKXC)

Previously, cost-intensive wet processing was necessary in order to extract valuable rock grade from contaminated input material. Dry processing with the addition of quicklime is not possible with conventional continuous mixers due to the extremely short processing time and poor mixing effect. An economical alternative has now been developed in the form of the patented BHS Combimix system of type DKXC.

The Combimix system transforms the twin-shaft batch mixer (DKX) into a mixer that operates continuously according to the proven three-dimensional mixing principle. This results in a significantly improved mixing effect compared with conventional continuous mixers. The residence time is dependent on the input material and can be varied flexibly from 30 to more than 100 seconds. The filling level is kept constant over the entire production time by means of weight sensing in the mixer. The material is extracted at the same rate as the input material is fed into the system. This procedure enables the recovery of usable rock, while also saving on water, energy and material costs.

Advantages compared with wet processing

  • No introduction of moisture into the aggregates
  • No wet sieving
  • No treatment of sludge water
  • Processing of the entire material without landfill disposal
  • Compact plant, also possible as a semi-mobile model
  • High recovery rate of usable rock
  • Sieving to less than 5 mm possible

Advantages compared with conventional continuous mixers

  • Continuous mixing process with defined mixing time
  • Low consumption of expensive burnt lime
  • Three-dimensional mixing concept
  • Consistently outstanding mixture homogeneity
  • High throughput rates
  • Excellent resistance to wear
Share this page:
Online contact request
Verify your details
Verify your details


Brochure "Combimix system (DKXC)" (PDF / 1.1 MB)
Brochure "Combimix system (DKXC)"

Product brochure for the Combimix system (DKXC) - For treatment of clay-and-rock mixtures

Size: 1.1 MB
Technical data sheet "Combimix system (DKXC)" (PDF / 95 KB)
Technical data sheet "Combimix system (DKXC)"

Technical data for the Combimix system (DKXC)

Size: 95 KB

Advantages of BHS mixing technology

  • Continuous mixing process with defined mixing time
  • Three-dimensional mixing concept
  • Consistently outstanding mixture homogeneity
  • High throughput rates
  • Excellent resistance to wear

BHS mixing technical center

Link to tests at BHS technical center

Technical article

Creating Value from Overburden

bulk solids handling
No. 2/3 · 2016
June 2016
PDF (145 KB)
Creating Value from Overburden

Valuable Rock Grade obtained from Contaminated Feed Material - The new dry process clay adhesions from screen waste produced in quarries and gravel
pits. Operators report that they are able to convert more than 90 % of contaminated feed material into salable rock grade using the ‘Combimix’ system.

Size: 145 KB
We use cookies in order to adapt the website to the requirements of our visitors in the best possible way. The use of our website indicates your agreement to having cookies stored on your computer. Data privacy