Diaphragms, mill shell linings and grinding balls

The efficiency of ball mills can be significantly increased by the quality of your components. For this reason Christian Pfeiffer continues to develop their mill components, enriching the market again and again with their innovations. In the process, the focus is on high functionality and wear resistance together with low specific energy consumption, low maintenance needs, and high availability. Here you can read everything about our diaphragms, slotted and backside plates, mill shell linings and grinding balls.

Diaphragms
With innovative Monobloc® construction

Reduced energy needs, increased efficiency: The installation of a diaphragm can increase the economy of a grinding plant enormously. The Monobloc® frame developed by Christian Pfeiffer is very stable, durable, and especially tough in use. This diaphragm construction is seen as today's most advanced state-of-the-art solution for modern grinding plants.

Christian Pfeiffer intermediate diaphragm for ball mills

Intermediate diaphragm

Material flow control and grain size limitation

Thanks to the material flow control and the limitation of the largest grain size by the intermediate diaphragm, the material stays in the first grinding compartment until it reaches optimum size; only then it moves into the second compartment  The separation of air and material flow, a major development by Christian Pfeiffer, ensures that so-called dead zones (zones without material being ground) directly behind the intermediate diaphragm are avoided. The result is a clearly more efficient grinding process.

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Discharge diaphragm

Individual adjustment to the grinding plant

The discharge diaphragm allows the ground material to pass, but retains the grinding balls in the grinding chamber. Christian Pfeiffer adjusts the diaphragm individually to the existing grinding plant, fixing it either on the discharge mill head or floating on the mill shell.

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Discharge diaphragm for ball mills by Christian Pfeiffer

Open lifter diaphragm

For mills with integrated drying chamber

By means of the open lifter diaphragm, the drying chamber integrated into the mill tube is separated from the grinding compartment. The steel grades used can easily withstand the up to 400°C hot gases found in the drying compartment.

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Double outlet diaphragm

For mills with central discharge

Mills with central discharge are fitted with a double outlet diaphragm. The material is transported from both head sides of the mill towards the diaphragm, then out through the openings in the mill shell.

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Slotted and backside plates for diaphragms by Christian Pfeiffer

Slotted and backside plates for diaphragms

Hardened rolled steel and innovative design

All diaphragm plates from Christian Pfeiffer are produced using highly wear- and breakage resistant rolled steel, which is a superior material compared to plates produced using cast material. The innovative design of the slotted and backside plates makes the entire grinding process even more efficient, and ensures a long service life for the equipment.

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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.

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Progressive activator lining by Christian Pfeiffer

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.

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CSL lining (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.

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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.

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Allmax® grinding balls
Wear resistant due to high-alloy steel

The Allmax® grinding balls are exceptionally wear resistant, thanks to the use of high-alloy steel with 11 to 19% chromium content. In the course of years of research and development, the alloys have been optimally adjusted to market requirements.

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