Products & Equipment
Mill Shell Linings
Innovative shape for dynamic grinding movements
The quality of the shell lining is decisive for the production potential of the grinding processes, because the dynamics of the grinding media movement inside the mill is mainly defined by the shape of the mill shell lining. For this reason, Christian Pfeiffer optimally designed shell linings which, thanks to different fastening systems (bolted lining, semi-bolted lining, and boltless lining) can be individually tailored to specific mill requirements.
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.
- Greater lifting heights produce higher impact energy
- Distribution of the ball load, so that the material is moved effectively into the material bed
- Controlled wear of the lining as a result of the grinding balls rolling over the lifters: The profile and effectiveness of the liner remain unchanged
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.
- Efficient grinding: Balls with the largest diameter are retained at the beginning of the compartment, balls with the smallest diameter at the end of the grinding path
- A combination of classifying with two types of lifter plates is possible, with wave liners or progressive activator plates. Both kinds of lifter plates lead to a cascading grinding ball load, and an optimum material transport through the second compartment
CSL Lining (compact spiral lining)
For second grinding compartment of 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.
- Designed for mono-chamber mills and mills with a second grinding compartment
- In comparison with conventional linings, there is a higher energy transfer per ton of grinding balls as a result of the balls being mixed: The periodic interruption of a pure rolling movement by the grinding balls through the plow plates improves the grinding effect of medium-sized particle sizes
- Because of the spirally arranged plow plates for this lining version, a completely bolted mill cylinder is definitely required.
- A combination of two types of lifter plates is possible, with wave liners or low lifter plates
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.
- Variable lifter angle depending on the moisture of the feed material
- Variable versions of wear protection depending on the abrasiveness of the feed material
- Bolted fastening for safe and easy installation and dismantling