Shell linings with
innovative shape
for dynamic grinding processes

Innovative shape for dynamic grinding movements

The quality of the shell lining is decisive for the performance of the grinding process, because the dynamic movement of the grinding media in the mill is significantly determined by the shape of the shell lining. Therefore, Christian Pfeiffer supplies optimally designed shell linings which are individually adapted to the respective requirements of the mill.

Click on the dots.

Adcantages of the different shapes.

1
1
Compact spiral lining

The temporary interruption of a pure rolling motion of the grinding balls by the plow plates improves the comminution effect of medium particle sizes.

2
2
Compact spiral lining
  • Combination with two types of siphon plates possible, wave lining or low siphon plate.
3
3
Classifying lining

Keeps the ball charge sorted by the size of the ball diapmeter.

4
4
Progressive activator lining

The progressive activator lining lifts the grinding balls far upwards with minimal slip, thus achieving optimum impact energy.

5
5
Dry chamber elements

When used in raw mills, the drying chamber elements carry the feed material along and transport it into the hot gas air stream. In this way, effective material drying is achieved.

6
6
Steel lining

Used in ball mills in the mining industry, the steel form and special hardness of the plates ensures efficient comminution of extremly hard materials.

1
Compact spiral lining

The temporary interruption of a pure rolling motion of the grinding balls by the plow plates improves the comminution effect of medium particle sizes.

2
Compact spiral lining
  • Combination with two types of siphon plates possible, wave lining or low siphon plate.
3
Classifying lining

Keeps the ball charge sorted by the size of the ball diapmeter.

4
Progressive activator lining

The progressive activator lining lifts the grinding balls far upwards with minimal slip, thus achieving optimum impact energy.

5
Dry chamber elements

When used in raw mills, the drying chamber elements carry the feed material along and transport it into the hot gas air stream. In this way, effective material drying is achieved.

6
Steel lining

Used in ball mills in the mining industry, the steel form and special hardness of the plates ensures efficient comminution of extremly hard materials.

Progressive activator lining

Improved impact energy in the first grinding compartment

The progressive lifting shape of the lining is ideal for the grinding process in the first compartment. Here the material is ground using grinding balls with a larger diameter. The activator lining transports the grinding balls upwards with minimum slippage, thus producing optimum impact energy.

Test
Test

Classifying lining

Efficient grinding in the second grinding compartment

The classifying lining provides efficient finer grinding of the coarse ground material. In the second compartment the material is primarily ground using pressure and friction, whereby the classifying lining retains the grinding balls with the largest diameter at the beginning of the compartment and the successively smaller balls at the end of the grinding path.

Compact spiral Lining

For second grinding compartment or mono-chamber mills

The compact spiral lining is mostly used in mono-chamber mills, or mills with a long second grinding compartment. The large number of progressive activator plates means that the ball load is moved optimally. The plow plates increase the energy transfer once again, creating a certain moderate sorting effect for the grinding balls, which improves the grinding power inside the ball charge.

Test
Test

Drying chamber elements

For the drying chamber of raw mills

Drying chamber elements are used in raw mills, where a pre-drying of the feed material is required. Their function is to pick up the moist feed material and to transport it into the hot gas airflow. This way an effective drying of the material is achieved.

more than 500 
mill shell linings
installed worldwide

Aren´t shell linings just wear parts for mill tube protection?

From our point of view, quite the opposite. The profiling of the shell lining plates creates the movement of the ball charge, which causes the grinding of the material. It is therefore essential for effective grinding in the mill and far more than just a wear part. The exact profile shape has to be defined depending on the ball sizes used, the rotation pace and the mill diameter. And thus, the shell lining has to be adapted to each mill individually.

Why do shell linings have different chromium contents?

The plates of the shell linings must not break during operation. If rough operating conditions are to be expected, a hard facing with a lower chromium content should be used. The chromium content often influences the service life of the hard facing, but not always. The ideal selection of the casting material is part of the standard of our machine and plant design. The design depends on the individual application conditions.

What is the best fastening system for the shell lining?

Any hole on the mill shell weakens the shell structure and is a potential leakage point. In addition, noise emission during operation is increased. Nevertheless, each type of fastening has its justification.

For coarse grinding in the first chamber, we prefer screwed solutions for DIN plates to ensure maximum availability and operational reliability. Alternative systems, with few or without screws, are used for fine grinding chambers.

Get your 360°Mill Check now!

The elimination of bottlenecks can lead to significant engery savings. 

Let's find your bottlenecks.

Millcheck Batch
Our service

AT YOUR SITE. WITH SERVICE EXCELLENCE FOR NEW AND EXISTING PLANTS.

A story of efficiency

Efficiency in grinding is our heritage and our future.
Since 1925.

Making grinding processes as efficient as possible is a science in itself – one to which we dedicate our entire expertise and spirit of innovation. From the invention of the first MONOBLOC diaphragm to the technical fine-tuning of the separator QDK. How we became what we are today.