Diaphragms & Linings

Product Range

Diaphragms

Intermediate Diaphragm MONOBLOC

Modular chamber-separating diaphragm for two-compartment ball mills — controls material flow and prevents overgrinding.

Discharge Diaphragm MONOBLOC

Outlet-end diaphragm controlling material exit from the final compartment — maintains optimal bed depth and prevents backflow.

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Open Lifter MONOBLOC

Open-design diaphragm for raw mills — maximises airflow through the mill while showering wet feed material for efficient drying.

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Slotted Plates & Backside Plates

Replaceable wear components for diaphragm assemblies — bolt-on replacement extends diaphragm service life without full removal.

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Intermediate MONOBLOC Discharge MONOBLOC Open Lifter MONOBLOC Slotted Plates

Featured Diaphragm

Intermediate Diaphragm MONOBLOC

The Christian Pfeiffer MONOBLOC intermediate diaphragm separates chamber 1 and chamber 2 in two-compartment ball mills, controlling material residence time and preventing overgrinding — assembled module by module through the standard manhole.

ModularManhole installation

AdjustableTunable slot aperture

DurableWear-resistant plates

Technical details

MONOBLOC design — assembled module by module through the mill manhole without special equipment.
Adjustable slot aperture to precisely control material throughput between compartments.
Robust wear-resistant slotted plates with bolt-on replacement — no full diaphragm removal required.
Centre piece with integrated lifting slots for safe, efficient installation and removal.
Available for all common mill diameters from 2.0 m to 6.0 m.
Minimised pressure drop across the diaphragm for efficient mill ventilation.
Compatible with both wet and dry grinding processes — cement, slag, raw meal and minerals.

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Intermediate MONOBLOC Discharge MONOBLOC Open Lifter MONOBLOC Slotted Plates

Featured Diaphragm

Discharge Diaphragm MONOBLOC

Positioned at the outlet end of the final grinding compartment, the Christian Pfeiffer discharge diaphragm controls material exit, maintains optimal bed depth and prevents finished product from flowing back into the mill.

ControlledPrecise outlet flow

StableConsistent bed depth

ModularManhole installation

Technical details

MONOBLOC construction — fully assembled through the mill manhole without special lifting equipment.
Adjustable slot width to control material hold-up volume in the final compartment.
Integrated backside plates protect the main structure from abrasive material wear.
Available for end-discharge and airflow mill configurations.
Also available as Double Outlet MONOBLOC for high-throughput applications requiring discharge on both sides.
Compatible with cement, slag, mineral and raw material grinding.
Suitable for all common mill diameters from 2.0 m to 6.0 m.

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Intermediate MONOBLOC Discharge MONOBLOC Open Lifter MONOBLOC Slotted Plates

Featured Diaphragm

Open Lifter MONOBLOC

Designed specifically for the drying chamber of raw mills, the Open Lifter MONOBLOC uses an open construction with no slots — maximising hot gas flow while showering wet feed material through the gas stream for efficient pre-drying.

OpenMaximum gas flow

EfficientFast material drying

ModularManhole installation

Technical details

Open construction with no slots — maximises hot gas throughput for drying chamber operation.
Lifter elements shower wet feed material through the drying gas for efficient heat transfer.
Available in various lifter heights and spacings to suit different raw material moisture levels.
MONOBLOC design — assembled module by module through the standard mill manhole.
Compatible with all common raw mill configurations processing wet materials.
Handles feed materials with moisture levels typical of raw quarried materials.

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Intermediate MONOBLOC Discharge MONOBLOC Open Lifter MONOBLOC Slotted Plates

Featured Component

Slotted Plates & Backside Plates

The wear-facing components of the diaphragm assembly — manufactured from abrasion-resistant steel alloys and designed for bolt-on replacement, so diaphragm service life can be extended without removing the full frame structure.

ReplaceableBolt-on swap

Wear-resistantAlloy steel grades

UniversalMulti-brand fit

Technical details

Manufactured from wear-resistant steel alloys — multiple hardness grades available to suit material abrasiveness.
Various slot widths available to control material fineness passing between compartments.
Bolt-on design — individual plate replacement without removing the full diaphragm frame.
Compatible with Christian Pfeiffer MONOBLOC diaphragm frames.
Backside plates protect the structural frame from fine material penetration and wear.
Also available as retrofit components for competitor diaphragm systems of any manufacturer.
Precision-machined for consistent fit and reliable sealing performance.

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Product Range

Mill Linings

Progressive Activator Lining

Step-shaped profiles that actively lift grinding media for impact grinding — optimised for chamber 1 coarse grinding applications.

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Classifying Lining

Creates a classifying effect inside the mill — larger media migrate to the feed end, smaller media to the outlet — reducing specific energy consumption.

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Compact Spiral Lining

Low-profile spiral lining that provides controlled axial material transport — suitable for both chambers with reduced ball charge requirements.

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Drying Chamber Elements

Open lifter elements for the drying zone of raw mills — shower wet feed material through hot gas to achieve efficient pre-drying before grinding.

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Progressive Activator Classifying Lining Compact Spiral Drying Chamber

Featured Lining

Progressive Activator Lining

A step-shaped mill shell lining for chamber 1 that actively lifts grinding media for cataracting impact — delivering efficient coarse size reduction while maintaining the correct media grading along the compartment length.

High ImpactCataracting media motion

EfficientOptimised lift profile

Long-lifeWear-resistant alloys

Technical details

Step-profiled panels create controlled cataracting motion of grinding media inside chamber 1.
Optimised step height and frequency matched to mill diameter and operating speed.
Available in manganese steel, high-chrome alloy and composite wear materials.
Modular bolt-on panels for section-by-section replacement during planned maintenance stops.
Profile geometry maintained throughout wear cycle — consistent performance to end of life.
Suitable for cement clinker, raw meal, slag and mineral grinding applications.
Available as retrofit for mills of any manufacturer, not only Christian Pfeiffer.

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Progressive Activator Classifying Lining Compact Spiral Drying Chamber

Featured Lining

Classifying Lining

The Christian Pfeiffer classifying lining creates a self-classifying effect inside the mill — larger grinding balls migrate toward the feed inlet where particles are coarser, while smaller balls concentrate at the outlet where fine grinding occurs.

ClassifyingAutomatic ball sorting

EfficientLower kWh per tonne

ProvenCement & slag mills

Technical details

Tapered pocket geometry continuously moves larger grinding balls toward the mill inlet.
Smaller balls concentrate near the outlet where material requires fine grinding — matching media size to particle size.
Reduces specific energy consumption compared to non-classifying linings.
Designed for chamber 2 fine grinding applications in cement and slag mills.
Profiling optimised for cascade angle at standard operating speed.
Available in high-chrome alloy for corrosive or wet grinding conditions.
Compatible with all standard grinding ball charge sizes from 15 mm to 50 mm.

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Progressive Activator Classifying Lining Compact Spiral Drying Chamber

Featured Lining

Compact Spiral Lining

A low-profile spiral lining that combines controlled axial material transport with efficient media activation — suitable for both chamber 1 and chamber 2, with the advantage of a reduced ball charge requirement due to its compact profile height.

CompactLow profile height

VersatileChamber 1 & 2

EfficientReduced ball charge

Technical details

Spiral geometry provides a controlled axial transport component that regulates material flow through the compartment.
Lower profile than activator linings — reduces ball charge requirement and associated power draw.
Suitable for both chamber 1 and chamber 2 in cement, raw meal and mineral grinding.
Available in high-chrome and manganese steel wear materials.
Compact modules fit through standard manholes — no special equipment required for installation.
Proven performance in cement and raw material grinding applications across Europe.
Available as retrofit for mills of any manufacturer.

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Progressive Activator Classifying Lining Compact Spiral Drying Chamber

Featured Lining

Drying Chamber Elements

Open lifter elements designed for the drying zone at the feed end of raw mills — showering wet feed material through the hot gas stream to remove moisture efficiently before it enters the grinding compartment.

OpenMaximum gas flow

EffectiveRapid moisture removal

RobustHeat-resistant alloys

Technical details

Open lifter design maximises hot gas contact with wet feed material for efficient drying.
Available in various lifter heights and plate thicknesses to suit different moisture levels and material volumes.
Manufactured from heat-resistant steel alloys — designed for continuous operation in hot gas environments.
Replaceable wear plates protect the main lifter structure and extend service life.
Compatible with all standard raw mill configurations requiring pre-drying of feed material.
Handles feed materials with moisture levels typical of raw quarried limestone, clay and marl.
Available as retrofit for mills of any manufacturer.

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Why Mill Internals Matter

The right internals reduce cost per tonne

Diaphragms and linings are not maintenance items — they are performance components. The correct diaphragm design controls residence time and material flow; the correct lining profile controls media lift and cascade. Together, they determine specific energy consumption and product quality.

We carry out site inspections to assess wear condition, identify underperforming designs, and recommend the right replacement specification for your mill and material.

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Correct chamber separationProperly designed intermediate diaphragms maintain the right media grading in each compartment — preventing overgrinding in chamber 2 and ensuring efficient coarse reduction in chamber 1.

Shell protectionQuality linings protect the mill shell from direct impact — extending the service life of your investment and reducing the risk of costly shell damage.

Optimised charge motionLining profile directly controls how media cascades and cataracts inside the mill — affecting grinding efficiency, wear rates and noise levels.

Any mill brandReplacement and retrofit linings are available for mills of any manufacturer — Christian Pfeiffer, FLSmidth, Polysius, KHD and others — not only CP equipment.

Diaphragms

Intermediate Diaphragm MONOBLOC

Discharge Diaphragm MONOBLOC

Open Lifter MONOBLOC

Slotted Plates & Backside Plates

Intermediate Diaphragm MONOBLOC

Technical details

Discharge Diaphragm MONOBLOC

Technical details

Open Lifter MONOBLOC

Technical details

Slotted Plates & Backside Plates

Technical details

Mill Linings

Progressive Activator Lining

Classifying Lining

Compact Spiral Lining

Drying Chamber Elements

Progressive Activator Lining

Technical details

Classifying Lining

Technical details

Compact Spiral Lining

Technical details

Drying Chamber Elements

Technical details

The right internals reduce cost per tonne

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Products that work together

Mills & Separators

Grinding Media

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