Mechanical and thermal process technology for bulk solids and powders

Grenzebach’s whirlwind mill ensures excellent results in the field of fine and ultra-fine grinding of soft to medium-hard bulk materials (up to Mohs hardness 5). The whirlwind mill can produce very fine powder qualities with narrow particle size distribution and excellent upper particle size limitation.

Sample applications:

• Limestone
• Cellulose insulation
• Gypsum
• Pigments
• Salts of various origins

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.

Sample applications:

• Ashes
• Slags
• Quartz
• Fireclay

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.

Sample applications:

• Titan slag
• Quartz
• Aluminum oxide
• Pigments
• Limestone

In Grenzebach’s VACUPRESS, bulk materials with a particle size smaller than 40 µm and a bulk density smaller than 750 kg/m³ can be compacted. The VACUPRESS can therefore be used as a deaeration and compaction unit upstream of packing equipment. It provides clear practical benefits: reduced dust generation during dosing and improved handling properties. The VACUPRESS also offers advantages as a pre-compaction device upstream of granulators.

Sample applications:

• Silica
• Carbon black
• Magnesium hydroxide
• Aluminum oxide
• Pigments

Rotary kilns from Grenzebach can be used in various process steps for processing temperatures of up to 1600 °C. This rotary kiln is characterized by a simple, robust design, high operational reliability, large throughput capacities and the ability to handle fluctuating feed quantities.

Sample applications:

• Petroleum coke
• Quartz
• STPP
• Titanium dioxide
• Iron oxide
• Activated carbon
• Catalysts

With Grenzebach’s indirect air-cooled rotary tube coolers, you can recover energy from heated solids after high-temperature processes – a clear contribution to energy-efficient process technology. This rotary tube heat exchanger ensures efficient energy recovery with simultaneous cooling of the bulk materials, especially when it is combined with rotary kilns. Savings for you and a plus for the climate!

Sample applications:

• Gypsum
• STPP
• Sodium carbonate

Grenzebach’s moving bed heat exchangers enable particularly gentle heating or cooling of fine-grained, free-flowing products. The heat exchanger, which is indirectly water-cooled or steam-heated, can handle large product mass flows. The moving bed heat exchanger can also be designed for food processing and can handle product temperatures of up to 1200 °C.

Sample application:

• Quartz
• STPP
• FCC catalyst
• Soda ash
• Fertilizer

The Grenzebach turbine dryer is the perfect solution for continuous drying of sensitive powder, crumbs, pastes, and flaky or lumpy products. In this process, the particles are rearranged slowly and gently, with virtually no abrasion and with minimal dust generation.

Sample applications:

• Calcium carbonate
• Calcium phosphates
• Pumice gravel
• Bentonite
• Titanium oxide

Grenzebach’s sectional coolers are indirectly water-cooled rotary tubes for cooling high-temperature bulk materials with material temperatures of up to 1,400 °C. The Grenzebach sectional cooler is suitable for very fine particles and for solids interspersed with coarser particles or agglomerates. Treatment of reactive products is also possible.

Sample applications:

• Petroleum coke
• Zinc oxide
• Magnesite causter
• Molybdenum oxide
• STPP
• Catalysts