VRM Grinding Table Liner Castings for Cement and Slag Mills

The grinding table is the stationary track against which the rollers crush the feed in a vertical roller mill. It carries the material bed and sets the grinding path, taking high-pressure crushing plus sliding abrasion on every revolution. Tiegu supplies VRM grinding table liners to cement and slag grinding plants worldwide, matching each order to a foundry that runs high-chrome and composite-overlay grades and machines the profile against your drawing before export.

1. What Grinding Table Liners Do

The table liner forms the wear surface the rollers press into. Its contour and height control the material bed thickness, and the segment fit keeps the grinding path true as the table turns. A worn or misaligned liner drops throughput and forces the rollers to work harder; a mismatched segment lets the roller strike the joint and chips the edge. Liners are planned-wear spares sized on tonnage, not on unit price.

For a broader view of how we handle sourcing wear-resistant castings from China, see our casting sourcing guide.

2. Why Material Grade Decides Service Life

A grinding table sees high-stress crushing and sliding wear rather than heavy impact, so the grade favors hardness and carbide support over toughness:

• KmTBCr20 / KmTBCr26 high-chrome white iron — the standard choice: high hardness with dense carbides that resist the rolling-and-sliding wear of the material bed.

• Composite overlay (high-chrome base + hardfacing) — a hardfaced working layer over a cast base for the highest-wear zones; costs more up front but extends change-out intervals.

• Ni-Hard 4 — high hardness with slightly more toughness where the duty runs hotter or the feed is coarser.

Pick the grade by feed abrasiveness and target life, not by catalogue. If you are unsure how to choose a casting supplier that runs these grades, the supplier-selection guide walks through the foundry checks that matter.

3. What We Verify Before Shipment

Grinding table liners are bought on hardness, contour, and segment fit — not on a nameplate. For these orders, Tiegu confirms the following with the foundry and on the documents:

• Chemistry on the MTC: verify Cr and C against the ordered grade — the carbide volume set by these elements is what balances hardness against the risk of brittle cracking. See our note on how to read a mill test certificate.

• Hardness and microstructure: confirm surface hardness and check carbide distribution; for overlay grades, confirm the hardfacing layer is bonded and free of delamination.

• Contour and segment fit: dimensionally inspect the table radius, liner profile, segment joints, and bolt holes against your mill drawing — a mis-cut segment lets the roller strike the joint and shortens the whole set.

• Set roundness and interchangeability: for segmented tables, confirm replacement segments match the set in service so the grinding path stays true after a partial change-out.

Not sure which grade fits your VRM duty? Contact us at tieguexport.com →

4. Specification Checklist for Buyers

• Mill type and model (cement / slag / raw meal) and table diameter.

• Grade (KmTBCr26, composite overlay, Ni-Hard 4) and hardness requirement.

• Drawing with contour, segment layout, bolt pattern, and tolerance (ISO 8062).

• Required NDT and surface condition.

• Spare strategy and lead time — tables change on a planned shutdown, so confirm before the outage.

When you are ready, submit an RFQ with your drawing and we will confirm grade, foundry match, and inspection scope.

FAQ

1. Is high-chrome or composite overlay better for a table liner?

It depends on the wear rate and your budget. High-chrome is the cost-effective default; a composite overlay costs more but stretches change-out intervals where the bed is most aggressive. We confirm the grade against your duty rather than defaulting to one.

2. How long does a grinding table liner last?

It varies with feed abrasiveness, mill throughput, and segment design. Operators plan table changes on a shutdown schedule; we help confirm grade and lead time so spares are on hand before the outage.

3. Do you supply single segments or full tables?

Tiegu supplies cast table liners to drawing, as individual segments or a full segmented set. For assembled tables we confirm the scope with you and arrange the foundry and inspection accordingly under one contract.

Tiegu is a China-based casting supplier serving international buyers through a vetted network of qualified Chinese foundries. We supply castings under a single commercial contract, managing supplier selection, technical confirmation, quality inspection, and export delivery from order to shipment.

Request a quote for VRM table liner castings →