VRM Classifier Louvres (Blades)

Cement & Minerals • Ravena, US

APPLICATION (+1 pts)

APPROVED

Basic Information

Overview

The customer was using OEM recommended AR plate for the application. The wear was excessively high and the customer had to replace these louvres (blades) 4-6 months.

Industry

Cement & Minerals

Location

Ravena, US

Component/Workpiece

VRM Classifier Louvres (Blades)

Business Type

Integra - Workshop

Job Type

New

OEM

Pfeiffer MVR 6000 R6 - Raw Mill

Type of Wear

Abrasion

Small Particle Abrasion

Base Metal

AR Plate

General Dimensions (mm)

1700 mm x 351 mm x 8mm (Dimension of each blade)

Problem Description

The challenge the customer was facing

The customer was using OEM recommended AR plate for the application. The wear was excessively high and the customer had to replace these louvres (blades) 4-6 months.

Previous Service Life

4mo

Welding Alloys Solution

How WA solved the challenge

Upon reviewing the problem with the customer, we proposed doing a trial with a HARDLITE 3+3 plate welded onto the original AR plate. Our HARDLITE 3+3 lasted 18 months while the AR blade only lasted 6 months. By understanding the functionality of the vertical mill and the air flow pattern to which these blades were subjected to, we then proposed the redesign of these blades by fabricating the entire blade with HARDLITE: Welded back-to-back HARDLITE 2+2. Total blade thickness: 8mm. The perimeter is also hardfaced so there are no exposed areas. Total number of fabricated blades: 94 Total number of HARDLITE 2+2 (Large) plates used: 74

Product Category

Composite Wear Plates

Product Name

Hardlite 100

Thickness

2+2 Hardlite

Technical Advantages

With the proposed back-to-back HARDLITE solution, these blades have been lasting over 2 - 2.5 years in service. Sometimes, the plant will replace a couple of blades not because these are worn, but because they have suffered impacts from rocks and the blades are starting to chip. By not having to replace these 94 classifier blades every 6 months, the plant has saved money and downtime. During outages, the plant can now focus their attention on other matters and not having the mill blocked for blades replacement.

Service Life

2y 6mo