Crushing, Screening & Conveying

Crushing, Screening & Conveying 2017-04-04T06:57:13+00:00
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Gyratory Crusher - Design of mantle and concaves (8 replies and 2 comments)

Eder Figueiredo
1 week ago
Eder Figueiredo 1 week ago

Hello everybody,

Wondering if somebody could help me.
I have experienced many problems due abnormal power draw behavior of the electric motor in a primary gyratory crusher in iron ore crushing , especially when the service life of the first row concave comes to an end. I suspect that the current eccentric throw of the mainshaft (52mm) is higher than is really necessary.

Does anybody have any literature about how to design correctly mantle and concaves for a primary gyratory crusher? Or does anybody know how to define correctly the mainshaft eccentric throw in a gyratory crusher? Or have an opinion?

Thanks in advance.

Kind Regards,

Stewart Fernandez
1 week ago
1 like by David

http://www.aggman.com/gyratory-crushers-misunderstood-maintenance/

that is a good link, but what gyro is this , manufacture and model, please

David
1 week ago
David 1 week ago

If you don’t keep the crusher choke fed the mantle and concaves will wear to a point where the reduction profile is changed and thus causes higher power draw and lots of heat. It’s the same when a “ducktail” is formed by not coke feeding or by having too many fines in the feed. The reduction profile is the key.

https://www.911metallurgist.com/blog/gyratory-crusher

https://www.911metallurgist.com/blog/crusher-concave-liners-and-mantle-wear

Stewart Fernandez
1 week ago
Stewart Fernandez
1 week ago

this maybe or use too , https://youtu.be/1CpjRMICXNM

 as well as the attached

Stewart Fernandez
1 week ago

please post pictures of the wear pattern and the make and model of the machine. this way, we can really help you.

Eder Figueiredo
1 week ago
Eder Figueiredo 1 week ago

Thank you all for sharing.
This is a PXZ1500II Gyratory Crusher from a Chinese Manufacturer (similar to a Metso MKII 60" x 89").  The mantle and concave were supplied by another company.
Please see attached photos.

used mantle b
https://www.911metallurgist.com/wp-content/uploads/2017/04/Used-mantle-B.jpg
used mantle a
https://www.911metallurgist.com/wp-content/uploads/2017/04/Used-mantle-A.jpg
concave replacement
https://www.911metallurgist.com/wp-content/uploads/2017/04/Concave-replacement.jpg
Stewart Fernandez
1 week ago

which site is this please ? 

 

Stewart Fernandez
1 week ago

please don't tell me that the machine was supplied by Liming Heavy Industry ?  or is it Citic or Zenith, , without all the information it is extremely difficult to comment, these are all Chinese machines and while they are cost competitive ( if you can't dazzle them with brilliance , baffle them with BS )  they will all supply you with a version of the PXZ1500II Gyratory Crusher , this confuses everyone when it comes to maintenance

 

if it is Citic HIC , I think I know who in Brazil can assist you , but I will ask my contacts in the crushing wear mantle and liner work to comment, I can also ask a good mate in Canada , or in the USA to talk to you- directly -  re liner supply  - a good liner supplier would easily answer all your questions without a doubt    to do this please email me directly with ALL of the appropriate details

Paul Morrow
1 week ago
Paul Morrow 1 week ago

The majority of gyratory crushers are used as primaries, i.e. they receive the initial feed from the mine or quarry. The same type of crusher with chamber modifications is used as a secondary crusher, particularly when following a large primary crusher. The fine-reduction gyratory crusher can also be used for tertiary crushing. The cone crusher has largely replaced the gyratory for secondary and tertiary applications....

This PDF should be useful to you.

Eder Figueiredo
1 week ago

Thanks Paul. This article will be very useful to me.

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