Advantage in throughput and outlet temperature

For optimum cooling performance and high throughput, Grenzebach’s experts tailor the design of your sectional cooler to the context of your plant as a whole. Based on our decades of experience and our comprehensive knowledge of the reaction behavior of bulk solids, we continuously develop our sectional coolers. Today, we offer our customers optimum cooling performance based on the individual conditions of their processes. Grenzebach sectional coolers stand out from other systems of the same size due to their higher cooling capacity.

As a full-service partner, Grenzebach accompanies you worldwide from project planning to customized system design, integration of the sectional cooler into your operating environment, installation and commissioning.

“Precise dimensioning of the sectional coolers for individual requirements! Our customers appreciate the plant’s optimum cooling capacities and high availability. Since no additional equipment is required for dedusting, the investment costs remain low.”


Michael Meyer Director Proecess Technology

The advantages of the sectional cooler at a glance


No filter systems or dusting systems needed

Thanks to indirect water cooling, there are no product losses due to entrained dust. When you cool products with the Grenzebach sectional cooler, you can dispense with filter systems and dust removal equipment.

Optimum cooling capacity, high throughput

The geometry of the cooler results in ideal cooling capacities and high throughputs even with compact dimensions. Grenzebach’s sectional coolers are superior to other systems with the same dimensions according to these performance parameters.

The best way of cooling reactive products

To cool reactive products such as petroleum coke or activated carbon, the cooling chamber can be inerted.

Robust and highly available

The sectional cooler can be created with compact dimensions and its design is very robust. Bulk materials that are mixed with coarser product particles or agglomerates can also be cooled without any problems. The cooler design prevents blockages on the product side and thus ensures high plant availability.

More than 300

sectional coolers supplied to cool a wide variety of products means a wealth of project experience. Combining this experience with our engineering know-how, our experts will work out the best solution

For a wide range of products


The sectional cooler processes very fine, free-flowing product particles, coarser particles and even materials interspersed with agglomerates. The sectional cooler is particularly appropriate for products with high inlet temperatures, such as zinc blende roasting products.

Reactive products that must be processed in an inert atmosphere, such as petroleum coke, can also be optimally cooled.

Grenzebach’s experts also develop solutions for products whose rheological properties change during cooling, such as products that lose their free-flowing properties in the cooling process above a certain temperature range and develop a slower, more viscous flow behavior.

The sectional cooler processes the following substances, among others:

  • Chemical industry: sodium tripolyphosphate, phosphorus salt, iron oxide, titanium oxide
  • Products such as soda ash, kaolin, zeolites, activated carbon, calcium carbonate, calcium chloride, sodium silicate
  • Stone/earth industry; kaolin, magnesite dust, fireclay, slag, ash, quartz sand
  • Coal/ores: Fine ore, manganese ore, converter dust, coke, activated carbon, ash, graphite
  • Zinc blende roasting products, pyrite burn-off
  • Metal oxides: titanium dioxide, iron oxide, molybdenum oxide
  • Aluminum hydroxide, aluminum fluoride, aluminum oxide
  • Plastics
  • Fertilizer

Sectional cooler – heat exchange in several sections

How the sectional cooler works

The sectional cooler is an indirect water-cooled apparatus for cooling free-flowing bulk materials. It is designed as a horizontal rotating drum, and the interior of the apparatus is divided into several sections. The walls between the sections and the double-walled drum shell are flushed with cooling water in countercurrent during rotation around the longitudinal axis. Due to the high temperature differences at the section walls, a heat exchange takes place, which cools the hotter bulk material. The cooling water is supplied through a hollow central shaft and discharged again without pressure.

The sectional cooler’s process parameters at a glance:

  • Cooling surface up to 1,000 m²
  • Product feed temperature up to 1,400°C
  • Product cooling up to 50°C
  • Cooling capacity up to 25,000 kW


Forward planning through thermal calculations

For a predictive design of your plant, including the exact cooling capacity, Grenzebach’s service experts offer a thermal calculation. First step: analysis of the particle size distribution and the TPC values of your bulk solids. On this basis, Grenzebach can simulate the cooling capacity well in advance and design your sectional cooler according to your exact requirements. Even fluctuating feed product temperatures and variable throughput rates can be taken into account. We also keep an eye on tough product phases during the cooling process.

Grenzebach’s experts work with software that was developed in-house and has proven itself in numerous large-scale plants worldwide. You get to know your plant in the 3D model at an early stage.

Sectional cooler from Grenzebach for cooling caustic magnesite


Magnezit Group, headquartered in Russia, once again opts for process technology from Grenzebach. A second sectional cooler is to start operation at the production plant in Satka, located on the western slope of the Southern Ural Mountains. It will be used there for cooling caustic magnesite. The powder is cooled down from about 800°C to some 100°C.

Kiln and drum measurement

Is everything operating perfectly? Grenzebach checks the condition of your rotary kilns, drums, dryers, coolers, sectional and tubular coolers, and calciners, applying extensive measuring and analysis methods. Our special measuring equipment and our trained engineers enable us to take measurements both during hot operation and during a plant shutdown. We present the results to you directly on site and are happy to advise you on the planning of preventive maintenance.

Kiln and drum measurement

For your plant’s lifetime

The Grenzebach Service Promise

Choosing Grenzebach assures that you will have a reliable and trustworthy partner throughout your equipment’s entire life cycle.

At Grenzebach, we provide expert support and future-proof enhancements of your equipment throughout its entire life cycle. This means less downtime, less planned servicing and maintenance, and lower costs.

Learn more

Further process solutions

Moving Bed heat exchangers: Gentle product cooler

Grenzebach’s vibrating tube mills are the solution for grinding medium-hard to hard, abrasive products. For example, they can grind slags, ashes or fireclay and operate according to the vibromill principle. In this process, Grenzebach’s vibration tube mill achieves consistently high throughput rates with low energy consumption.

Rotary heat exchangers: Energy efficient cooling

With the Grenzebach Jet Airstream Sifter, powders from all areas of solids processing technology can be separated into three fractions – fine, medium and coarse material – in just one step. The Jet Airstream Sifter is suitable for sifting bulk materials and for separating fines without spattering.

Tube Cooler

The Tube Cooler is an indirect air or water-cooled rotary tube cooler for bulk solids - with no direct material contact. Designed for fine and non-sticking products suitable for being conveyed by the drum rotation. With the Grenzebach tube cooler hot air can be used as secondary energy for pre-assembled equipment.

Your contact person: Patrick Barthel

Do you have questions about the sectional cooler? Would you like to discuss a special use case? Contact us – we will be happy to advise you!

Patrick Barthel Grenzebach