Mill Liner
Mill liners in manganese and high chromium for grinding circuits
What This Casting Does And Why It Matters
Mill liners protect the shell and lift the charge, and their profile controls how the mill actually grinds. We supply liners alongside grinding rollers to the Chinese electric power industry, cast in austenitic manganese and high chromium white iron and heat treated in the same controlled cycle as our crusher wear parts.
Technical Features
- Austenitic manganese steel Mn13 to Mn22Cr3
- High chromium white cast iron Cr15, Cr25, Cr30
- Lifter and profile geometry reproduced from your drawing or sample
- Cast in sets from the same heat for even wear
- Packed on steel pallets for forklift handling
What You Get That You Would Not Get Elsewhere
Supplied alongside grinding rollers to the power industry
Austenitic manganese and high chromium white iron options
Controlled quench cycle, started within 30 seconds of withdrawal
Chemical analysis and dimensional inspection standard
The Failures This Part Is Cast To Prevent
- Liner sets from mixed suppliers wearing at different rates
- Lifter profiles worn flat, changing the grinding action
- Shell damage where liners were run past their limit
- Foundries that cannot pour and heat treat the larger sections
Who It Is For
- Coal-fired power generation operators
- Copper and iron ore concentrators
- Cement and mineral grinding plants
- Mill rebuild contractors
Application Scenarios
- Coal mill relining
- Ore grinding circuits
- Mill overhauls
- Critical spares holding
Technical Data For Mill Liner
Every figure here comes from our published foundry capability. Where a value depends on your machine it is confirmed at quotation rather than guessed.
| Specification | Detail |
|---|---|
| Part type | Mill liner, shell liner, lifter bar |
| Material options | Austenitic manganese steel, high chromium white cast iron Cr15, Cr25, Cr30 |
| Industry supplied | Chinese electric power industry, copper and iron ore operations |
| Source geometry | Drawing, customer sample or 3D scan |
| Heat treatment | Water quenched within 30 s of withdrawal |
| Max single casting weight | 10 t |
| Inspection | Chemical analysis and dimensional report |
| Packing | Steel pallet |
How This Casting Is Made
Pattern Making
Once drawings are confirmed, pattern making starts immediately in our own pattern shop. Thousands of finished patterns are already on the shelf, so repeat parts skip this step entirely.
Sandbox Making
Casting Process Simulation System (CPSS) is run before the moulds are made. The cavity is kept as solid and as clean as possible so that inclusions have nowhere to start.
Melting And Pouring
Charge materials are bought to a high standard and temperature is controlled through the whole pour to achieve a fine grain structure. Samples are taken to verify the analysis and adjusted if needed, then kept for at least three years for traceability.
Sandbox Opening
Also called casting cleaning. After initial cooling the box is opened, risers and runners are removed and the casting is cleaned. Cooling time is set by casting size, not by the clock.
Heat Treatment
Heating temperature is strictly controlled and castings are spaced in the furnace so they heat uniformly and meet the water fully. Quenching begins within 30 seconds of withdrawal from the oven.
Machining
After rectifying and polishing, castings are machined strictly to drawing for correct fitment. QC then carries out dimensional inspection and issues the dimensional inspection report.
Inspection
Our own physical and chemical laboratory covers spectrometry, hardness, microstructure, dye penetrant and dimensional inspection on site rather than at a third party.
Packing And Delivery
Finished parts are packed on steel pallets for forklift handling, to international standards for road, rail, sea and air transport.
Inspection Supplied With This Part
Chemical analysis and a dimensional inspection report are standard on every order. The remaining procedures are carried out in our own physical and chemical laboratory when specified at order stage.
| Procedure | When |
|---|---|
| Chemical Analysis | standard on every heat |
| Dimensional Inspection Report | standard on every order |
| Hardness Testing | if specified |
| Tensile Testing | if specified |
| Microstructure Analysis | if specified |
| Magnetic Particle Testing | if specified |
| Dye Penetrant Testing | if specified |
| Ultrasonic Testing | if specified |
Laboratory Equipment
- German-made OBLF direct-reading spectrometer
- Hardness testing equipment
- Metallurgical microscope
- Dye penetrant inspection equipment
- Dimensional inspection equipment
How This Part Compares With The Alternatives
| Compared With | What Changes |
|---|---|
| A mixed-supplier liner set | Cast from one heat in one foundry, a set wears evenly and is replaced on one shutdown. |
| Manganese versus high chromium liners | Manganese tolerates impact; high chromium resists abrasion. The choice follows the charge and the feed, and both are cast here. |
| Running liners past their limit | The mill shell becomes the wear surface, which turns a reline into a repair. |
If Your Part Is Not Standard
With our own pattern shop, a 3D scanner and Casting Process Simulation System, we work from your drawing, your worn sample, or a scan taken on your site. Material grade, profile and machining are all specified against your machine rather than against a catalogue.
- Reverse engineering from a worn part, with no drawing required
- On-site 3D scanning where the component cannot be removed
- Material grade selected against your feed rather than a default
- Pattern retained afterwards, so repeat orders skip pattern making
Fitting And Getting The Life Out Of It
- Supply the mill drawing, liner profile and material specification with the enquiry
- Replace liners as a complete set rather than section by section
- Inspect the shell condition during relining
- Record the tonnage achieved to refine the next material choice
Mill Liner At The Foundry
Parts Usually Ordered Alongside This One
Grinding Roller
Mill grinding rollers supplied to the Chinese electric power industry
View Part →
Reverse Engineered Wear Castings
From a worn part with no drawing to a repeatable casting
View Part →
Bowl Liner And Concave
The fixed half of the cone crushing chamber, cast in seven manganese grades
View Part →
Smooth Surface Roller Shell
Smooth-faced shells for controlled reduction, cast by an OEM roller supplier
View Part →
Mill Liner Questions
Which industries do you already supply liners to?
The Chinese electric power industry, and we also supply castings to Yunnan Copper and iron ore operations in Shandong province.
Manganese or high chromium?
Manganese where impact dominates, high chromium where abrasion does. We cast both and will advise against your charge and feed.
Can you work from a worn liner?
Yes, through our pattern shop, with 3D scanning available.
Do you supply complete sets?
Yes, cast from one heat so the set wears evenly.
Get A Price For Mill Liner
Send the machine model, the part number if you have one, and the quantity. If you have neither, a photograph with the main dimensions is enough to start.