Solutions

Vertical Mill (Rollers & Table)

Hardfacing and reconditioning of vertical mill rollers and tables.

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Vertical Mill (Rollers & Table)

Vertical mill (VRM) rollers and tables are surfaces that wear continuously while grinding raw meal and coal. Reweld reconditions them by hardfacing with NiHard IV and chromium-carbide cored wires — both on-site and in the workshop — with years of experience on Loesche, Pfeiffer, Krupp Polysius and Sinoma mills.

Applications

  • Vertical mill rollers (Loesche · Pfeiffer · Krupp Polysius · Sinoma)
  • Mill tables and table segments
  • Segmented rollers
  • Raw-meal and coal vertical mills

On-site and workshop application

  1. Installing drive reducers on roller hubs and automatic welding heads on the rollers
  2. Cleaning and template-based wear measurement
  3. Starting build-up from the most worn zone (3–4 rollers simultaneously)
  4. First pass with 1.6 mm cored wire — low heat input minimises stress cracking
  5. Hardfacing and restoring to template dimensions
  6. In the workshop, segmented parts are welded on the hub, numbered and prepared for dispatch

Technical specifications

Alloy / hardness
NiHard IV · 58–62 HRC (UTP SK 162-O: 4.5–5.5 C, 25–27 Cr)
High-wear zones
62–63 HRC (UTP SK A43-OB: 22 Cr, 7 Nb, 2 B)
Delivery
On-site + workshop
Mill makers served
Loesche · Pfeiffer · Krupp Polysius · Sinoma
Quality control
Template measurement · ovality check
Our work

Field & workshop work

Precision measurement of the roller profile.
Precision measurement of the roller profile.
Table surface grinding and dimensional check.
Table surface grinding and dimensional check.

Selected projects

Roller & table in the workshop

  • Reconditioned roller
  • Dispatch of reconditioned roller segments
  • Worn grinding roller
  • Worn roller segments
  • Roller before reconditioning

On-site roller & table

  • On-site hardfacing inside the mill
  • On-site welding on the table surface
  • Work inside the mill
  • On-site table measurement
  • Template check of the table profile

Carbon-arc gouging & face hardfacing

  • Carbon-arc gouging of the roller face
  • Preparation for face hardfacing
  • Roller face hardfacing repair

Video

VRM roller face repair — carbon-arc gouging
On-site hardfacing of VRM grinding rollers
On-site multi-head hardfacing of a VRM table
On-site hardfacing of a VRM grinding table
VRM table — post-hardfacing measurement

Your partner against wear.

Let's assess the wear points at your plant and offer the solution that fits best.

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