Crushing, Screening & Conveying

Crushing, Screening & Conveying

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improving liner wear profile (4 replies and 1 comment)

J
Jon Juhlin
7 years ago
Jon Juhlin 7 years ago

The attachment (cone crusher wear profile.pdf) shows a before/after profile of wear parts from a cone crusher. The light line is the original profile. The bold line is the worn profile. The phantom shows the worn liner profile where it would have been positioned in the crusher just prior to removal. The mantle displays a typical wear pattern that leaves a 'dish' in the parallel zone of the mantle just above the very bottom and a portion of the very bottom that does not wear as much.The resulting worn part has a bell shaped profile. I see this a lot on almost all worn mantles and consider this normal and there are no particularly bad negative side effects in most cases. But a) why does the bottom of the mantle not wear out and b) what can be done to the 'new' profile to prevent this from happening?

cone-crusher-wear-profile.pdf
David
7 years ago
David 7 years ago
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Hi,

this is what I call the 'ski-jumper' profile.

Are you certain your cone crusher is been shock fed at all times?

Below is a classic wear pattern.

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J
Jon Juhlin
7 years ago
Jon Juhlin 7 years ago
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This profile is from a customer's machine and I can't verify that it was choke fed all the time, but I see this condition often enough that I think it occurs under a variety of operational conditions. I assume there might be something we could do profile-wise on the as-cast profile to prevent it.

I'm unfamiliar with the wear sensors in your reply. Where can I find more information on these sensors?

I
Ian Lim
6 years ago

Hi John, why do you want to prevent it?

J
Jon Juhlin
6 years ago
Jon Juhlin 6 years ago
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Thank you for your reply. I had given up on anyone else contributing to this thread. The reason I want to prevent it is because the crusher tends to get less efficient and contributes to removal of wear liners that should (in my opinion) continue to perform. One would expect liners in a cone crusher to reliably wear out as in David's diagram posted a month ago. As you can from my original diagram, the phantom line represents the bowl liner at the end of its life. Notice that the liner extends radially a significant distance past the end of the gyrating mantle and I would expect to be wear off the lump at the bottom edge of the mantle. I have observed this for many years. Some cases are worse than others, but all mantles regardless of the application exhibit some degree of what David refers as ski jumper profile. Unfortunately David offered no suggestions of how the as-cast profile could be changed and/or operational changes that could be made to make the worn-out profile look like his diagram. His diagram is intuitively logical but I see this very seldom.

The liners tend to wear all the way to the end of the crushing surface but not so with the mantles and I'm quite sure I'm overlooking something easy to correct the situation.

Thank you for your interest.

David
6 years ago
David 6 years ago
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Hi Jon, 

- operational changes that could be made = BE SURE to choke feed the crusher.

I have never seen or hear of a design that allows for no choke feeding.

Also, be sure to use quality liners:

http://www.me-elecmetal.com/en/

http://bradken.com/

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