Cement mixtures

BHS has developed the dry poweder batch mixer (type DMX) specially for mixing dry powdery materials and composite cements. The DMX is based on the principle of twin-shaft mixing technology which has already proven its worth in a wide range of applications due to its outstanding mixing abilities. Thanks to the sophisticated mixing mechanism with the directed three-dimensional motion pattern, the speed of the mixer can be less than that for comparable single-shaft or intensive mixers while still producing a greater mixing effect. Formula ingredients that are added even in the smallest quantities are quickly and evenly distributed in a reproducible fashion.

Residue-free discharge is possible thanks to two large discharge door wings. The seals on the door wings are specifically designed to meet the requirements of the cement industry, where mixers must be "water-tight" when closed. For the minimization of residues in the machine, required when changing formulas, special smooth mixing tools can be selected. Compared with other mixing systems, twin-shaft mixers are filled to a much greater extent, making them more compact for a comparable throughput rate and also more warp-resistant. In the case of new plants, mixers of the DMX series are thus ideal because of their small dimensions; for modification to existing plants, they allow the installation of a more powerful mixer in the available space.

Cement dust

In a cement plant, the cement dust generated by the flow of exhaust gas during the calcination process – so-called bypass dust – contains the harmful substance chloride among other things. This cement dust can be reclaimed in the wet process. Water is added to the dust, creating a pumpable suspension. This suspension is then continuously fed to the BHS indexing belt filter (type BF) – an indexing vacuum belt filter. There the suspension is filtered, the chlorides are washed out of the filter cake and the washed dust is pre-dried. The solid matter is fed back into the cememt manufacturing process.

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Brochure "Indexing belt filter (BF)" (PDF / 2.0 MB)
Brochure "Indexing belt filter (BF)"

Product brochure for indexing belt filter (BF) as a continuously operating, horizontal vacuum filter

Size: 2.0 MB
Brochure "Dry powder batch mixer (DMX)" (PDF / 1.0 MB)
Brochure "Dry powder batch mixer (DMX)"

Product brochure for dry powder batch mixer (DMX)

Size: 1.0 MB

Advantages of BHS mixing technology

  • Superior twin-shaft mixing technology
  • Compact design
  • Residue-free discharge
  • Water-tight discharge door wings
  • Variant with agitators possible
  • Low operating costs
  • Trained service team

Advantages of BHS filtration technology

  • Safe chloride washing process
  • Recycling of cement dust
  • Fully automatic operation

BHS mixing technical center

Link to tests at BHS technical center

Technical article

Treatment of bypass dust in cement manufacturing

3 | 2017
April 2017
PDF (694 KB)
Treatment of bypass dust in cement manufacturing

Indexing belt filters from BHS-Sonthofen enable the bypass dust accruing during clinker manufacturing to be completely reincorporated into the process by using up to 100 % of more cost-effective alternative fuels in cement kilns. Reincorporation of the salvaged bypass dust increases cement production by up to 3 %. Proof is provided by a new plant having ...

Size: 694 KB

Cement production: using bypass dust to reduce energy costs

No. 5/2016 (November/December)
November 2016
PDF (1.4 MB)
Cement production: using bypass dust to reduce energy costs

A new method makes it possible to use up to 100 % alternative fuels for clinker production and to recover the resulting bypass dust as a recyclable material. Indexing belt filters from BHS-Sonthofen enable the bypass dust obtained during the production of clinker to be completely reintroduced into the process when using up to 100 % of the more costeffective alternative fuels in cement kilns.

Size: 1.4 MB

Twin mixing plant: Two different mixing procedures in one system

5 | 2016 (May)
May 2016
PDF (1.2 MB)
Twin mixing plant: Two different mixing procedures in one system

A new unparalleled mixing plant from BHS-Sonthofen has been in operation of late at Nikolaus Müller Kalkwerk-Natursteinwerke (Müllerkalk) in Rhineland-Palatinate close to the Belgian border: It combines the continuous moistening of agricultural lime and the batch production of mixed binders for ground stabilization measures. The new plant opens up new markets for Müllerkalk, thereby compensating for the somewhat seasonally fluctuating lime market. The fully automatic loading is a special feature: it is available approximately 24 hours a day, 7 days a week.

Size: 1.2 MB
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