Columbia steel for one Rexnord for another. ■

try METSO MINERALS.....in brazil........and worldwide.

for all types of crushers. ■

Given the the dimensions and alloy properties, any local foundry with, say the ISO 9000 bits and pieces should be able to produce for you. With modern 3D Cad the pattern will only take a few minutes, OK an hour or two, to knock out (HO HO). Afer that an alloy casting is just an alloy casting. There's nothing mysterious about them. There isn't. If some metallurgical whiz kid tries to baffle you with science, listen to him by all means. Then get you bits made locally.

The most important component is the resin backing. When I worked at Rexnord the resin sales girls transformed the South African branch from a Scandinavian tax write off to a top group earner. Although they were lovely kids the resin must have been pretty good as well. ■

We are not getting wear as compared to past practices...any ideas? ■

some questions:

1. Has your feed material hardness changed?

2. Have you changed suppliers of the wear parts?

3. Has the size of the feed changed at all?

4. More moisture than previously crushed materials?

5. Buying less expensive wear parts? maybe less wear resistant materials in the makeup? ■

1) Feed hardness is similar.

2) Supplier is the same.

3) Feed distribution is always variable. Mine group is currently focused on blasting practices.

4) MOISTURE IS DECREASING DAILY, but can be considered variable.

5) Million $ question.

All of our liners are from Metso in Brazil. The manganese content has never been assayed or challenged. Also choke feeding tends to work harden liners for greater wear resistance. When material slides, abrades or wears the work hardened surface off, we see wavy or uneven liner wear.

It seems logical to start with changes in metallurgy quality and operating practices to start. I'll let you know what I find! ■

I would have them send you a spec sheet on amount of chrome or other wear material percentage contents of the liners being used now for starters.

CHOKE feeding is really necessary to maintain proper crushing of materials.....and optimize wear.

UNDERFEEDING......on the other hand causes off spec problems and uneven wear surfaces which increase wear cost per ton. ■

Look at Melco Precisions Pvt Ltd

www.melcocastings.com

Person: Ankit

Phone:+91 98184 36295 ■