enEnglisch
Shell lining 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 lining which are individually adapted to the respective requirements of the mill.
Advantages of the different shapes.
The temporary interruption of a pure rolling motion of the grinding balls by the plow plates improves the comminution effect of medium particle sizes.
- Combination with two types of lifter plates possible, wave lining or low lifter plate.
Keeps the ball charge sorted by the size of the ball diameter.
The progressive activator lining lifts the grinding balls far upwards with minimal slip, thus achieving optimum impact energy.
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.
Used in ball mills in the mining industry, the steel form and special hardness of the plates ensures efficient comminution of extremly hard materials.
The temporary interruption of a pure rolling motion of the grinding balls by the plow plates improves the comminution effect of medium particle sizes.
- Combination with two types of lifter plates possible, wave lining or low lifter plate.
Keeps the ball charge sorted by the size of the ball diameter.
The progressive activator lining lifts the grinding balls far upwards with minimal slip, thus achieving optimum impact energy.
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.
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.
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.
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.
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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.