Tietjen Verfahrenstechnik GmbH

OPTIMUM PROTECTION OF THE MILL WITH MINIMUM 

PERSONNEL INPUT

EFFICIENT FOREIGN OBJECT SEPARATION

• Two extra strong permanent magnets for the separation of magnetic foreign bodies
• Cross-flow sifting for separating non-magnetic foreign objects, air flow adjustable with baffles
• Fully automatic cleaning of the magnets and emptying of the foreign object collection tray (pneumatically operated)
• Discharge of foreign particles via an integrated screw conveyor
• Discharge of foreign particles via a pipe at the side of the mill, e.g. into a collection container
RELIABLE OPERATION AND LONG SERVICE LIFE
• Robust welded steel construction for continuous industrial operation (24/7)

HIGH AVAILABILITY
• Avoidance of mill downtimes in the event of damage by foreign bodies
• Fully automatic cleaning without the need for personnel

HIGH LEVEL OF SAFETY FOR PERSONNEL AND PLANT
• Tested and certified in pressure shock resistant and flameproof design (0.4 bar)
• ATEX version according to zone 22 (II 3 D) possible outside
• Pressure surge resistance also guaranteed during the cleaning process by a pipe flap

FOREIGN PARTS SEPARATOR AGS AD

The air gravity separator AGD AD serves to aspirate the hammer mill and, at the same time, to continuously separate all kinds of foreign particles.
Via pneumatically swivelling magnets and flaps, the foreign particles are 
cleaned off fully automatically and discharged into a collecting screw in a 
time-controlled manner. The collecting screw discharges the material via a lateral pipe. To ensure pressure surge resistance, the pipeline is closed via a pipe flap during emptying. A separate control system monitors this process.
The foreign parts separator is ideally suited in combination with our dosing screw TTS for optimal feeding of the hammer mill and is available in four working widths to match our mills.
 

CRUSHER SERIES CR

YOUR TOOL FOR THE TOUGH JOBS

The CR crusher is a multi-purpose machine for the coarse crushing of bulk materials. This machine is suitable for crushing agglomerates, for example, or for pre-crushing coarse pieces of material for further grinding. This means that large pellets can be pre-crushed, for instance. This protects the hammer mill screens.
The housing is especially sturdy and features a replaceable Hardox baffle 
plate. The rotor is equipped with Hardox beaters spread over three axles 
and mounted on both sides. The drive is provided by a three-phase motor mounted on the side via a belt drive. The machine can be installed as a stand-alone unit or be integrated into a grinding system.

TECHNICAL DETAILS

• Strong welded-steel construction with symmetric design 
• Replaceable Hardox 450 impact plate, easy to change
• Solid 15 mm beater made of Hardox 450
• Generously dimensioned inlet for coarse pieces of material
• Long-life rotor in special design
• Easy access to the grinding chamber through hinged doors with door locking and standstill monitoring
• 3 sieve segments, easy and quick to change segment by segment
• Three-phase motor attached to the side of the housing
• Belt drive with protective cover
• 3 temperature sensors for monitoring the storage and interior temperature
• Tested and certified in a shock-resistant and flame escape proof design up to 0.4 bar
• Grist spectrum can be varied by different sieve perforations

HAMMER MILL – LARGE-CHAMBER MILL SERIES GD
THE POWER PACKAGE FOR MAXIMUM THROUGHPUT – 
PARTICULARLY SUITABLE FOR FINE GRINDING APPLICATIONS.

The Hammer Mill GD is designed for fine grinding in pet food and 
aqua feed production, as well as for coarse grinding, in the feed-milling, 
ethanol and wood industries.
Specifically designed for efficient grinding for challenging recipes 
and products:

The special 6-axis rotor design with rapid-change beater-frame system plus optimized beater configuration in combination with high 
beater tip speed guarantees maximum material contact for the efficient production of the finest feed as well as coarser products.
The GD Series comprises four sizes with a drive-power range between 
90 and 450 kW.

TECHNICAL DETAILS

• Strong welded-steel construction with symmetric design, allowing rotation in both directions
• Strong wear-resistant parts protect the grinding chamber and are easy to maintain
• Two position inlet flap with proximity switches to change direction of rotation
• Large hardened impact plates at both sides of the mill inlet area to ensure best grinding performance
• Catch-trap for foreign bodies inside the grinding chamber to protect the screens, easy to clean
• Dynamically balanced long-life rotor in special design, run down time < 6 minutes without brake
• Special beater fastening in support frames (cassette-exchange), beater changes in just a few minutes 
• Wide opening doors allow easy access to the grinding chamber
• Large screen area consisting of 4 screens that can be easily and individually changed
• Mill and motor section are separable, making installation easier especially in limited spaces 
• Tested and certified in a shock-resistant and flame escape proof design up to 0.4 bar
• Grist spectrum can be varied by a frequency converter (FC) and the beater configuration

Tietjen large-chamber hammer mills prove their worth operating 24 hours a day, 7 days a week – often in the harshest of environments. 

The reliability of our machines is legendary.
 

HAMMER MILL – HIGH-SPEED MILL SERIES VDK

THE ROBUST STANDARD MACHINE FOR MEDIUM THROUGHPUT – 

PARTICULARLY SUITABLE FOR FINE GRINDING APPLICATIONS.

The Hammer Mill VDK is designed for fine grinding in pet food and 
aqua feed production, as well as for coarse grinding, in the feed-milling, ethanol and wood industries.
Specifically designed for efficient grinding for challenging recipes 
and products:
The special 6-axis rotor design plus optimized beater configuration 
in combination with high beater tip speed guarantees maximum 
material contact for the efficient production of the finest feed as well 
as coarser products.
The VDK Series comprises five sizes with a drive-power range between 
30 and 250 kW.

TECHNICAL DETAILS
• Strong welded-steel construction with symmetric design, allowing rotation in both directions
• Strong wear-resistant parts protect the grinding chamber and are easy to maintain
• Two position inlet flap with proximity switches to change direction of rotation
• Large hardened impact plates at both sides of the mill inlet area to ensure best
 grinding performance
• Catch-trap for foreign bodies inside the grinding chamber to protect the screens
• Dynamically balanced long-life rotor in special design equipped with 6 mm beaters
• Quick beater change by using our special Beater Quick-Change Device 
• Wide opening doors allow easy access to the grinding chamber
• Two screens that can be easily and individually changed
• Tested and certified in shock-resistant and flame escape proof design up to 0.4 bar
• Grist spectrum can be varied by a frequency converter (FC) and the beater configuration

Tietjen high-speed hammer mills prove their worth operating 24 hours a day, 7 days a week – often in the harshest of environments.

The reliability of our machines is legendary.
 

THE RIGHT COMBINATION FOR THE BEST GRINDING RESULT

The sum is more than just the individual parts. This also applies to grinding! Maximum performance can only be achieved with a grinding module that is tailored to the individual application and type of hammer mill.

Tietjen offers customers the appropriate grinding module, which has been carefully designed taking into account product properties, space conditions in the plant, as well as explosion protection.

The aspiration of the mill and the discharge of the ground product are just as important as the grinding itself. For the transport of the ground product, Tietjen offers mechanical or pneumatical transport solutions