PBG Cone Crusher

8/17/2019 PBG Cone Crusher

1/14

Nordberg GP series cone crushers

Wear parts application guide


2/14

2

Wear parts application guide - Nordberg GP series cone crusher

GP cone crusher and basic conceptsGP cone crusher is a compressive

crusher where f eed material is

crushed between a fixed concave

and a movable mantle. Bigger

rock particles are crushed against

the mantle and concave. This is

called single-laer crushing.

!maller rock particles are crushed

between other rock par ticles"

which is called multi-laer crush-

ing. multi-laer crushing plas a

significant role in the GP cavit.

This improves the end pr oduct

#losed side setting $#!!%

The closed side setting defines the r eduction

ratio in GP cone crusher and has significant

bearing on product gradation" capacit and

power draw.

The closed side setting is measured fr om

the bottom of the mantle to the bottom of

the concave at their closest coincidence dur-

ing the grating ccle.

Nip angle

The nip angle is the the angle between the

mantle and the concave. Too large nip angle

reduces the capacit and increases the wear

due to f eed material is bouncing upwards in

the cavit.

& eduction r atio

The reduction ratio means the reduction fac-

tor between f eed and a product. This ratio is

usuall taken from the '() point of the f eed

and product cur ve. * tpical reduction ratio

for the GP secondar crusher is +-, and" f or

the GP fine crusher " .,-+.

shape and reduces wear in wear

parts.

eed opening

The f eed opening defines the maximum f eed

si/e to the crusher . 0n GP cone" the closed

side f eed opening is measured from the top

of the concave to the top of the mantle

when the mantle is at the closed side setting

position.

The maximum f eed si/e in GP cone is the

same as closed side f eed opening. maximum

f eed si/es are also stated in cavit configura-

tion tables later in the guide.

Reduction ratio = F80 /

P80

Product F eed


3/14

3


4/14

1

Good feed level and distribution

2ow to operate a GP cone crusher 0n order to get optimum capacit

and maximum lif etime of wear

parts" consider the f ollowing

points3

. #heck the feed arr angement3

4 The crusher should be choke f ed so that

the crushing chamber is full all the time.

This is important" especiall in fine crushing.

#hoke f eeding maximi/es the amount of

multi-laer crushing" and improves wear

shape and crushing efficienc.

Too big feed material Too small feed material

5. #heck the feed si/e and gr adation3

4 6versi/e f eed material decreases capacit

. #hoke f eed level for GP secondar

crusher is at the level of the mantle

fixing nut

5. #hoke f eed level for GP fine crusher

is max meter above the top bear ing

ar rangement

4 The f eed must be distributed evenl +7(8across the crushing chamber . 9neven f eed

distribution ma cause unbalanced crushing

f or ces and uneven wearing in the GP con-

cave.

4 eed should not be segregated $for exam-

ple finer material in other side of cavit%.

4 The flow of the f eed should be stable and

continuous. $2owever GP cone crusher can

be used in pulse f ed applications as the

head spin is minimi/ed.%

4 #irculation is needed when producing high

:ualit pr oducts.

and can cause unnecessar loads to the

crusher .

4 Too small f eed si/e for the cavit increases

wearing at the bottom part of liners and

ma cause poor utili/ation rate of wear parts.

4 ines $(-1% should be screened awa bef or e

the crusher as the ma cause pack ing. $GPsecondar is not sensitive to fines%

4 eed gradation should be stable $no gaps

in f eed%.

Note3 eed material characteristics

such as gradation" bulk densit" mois-

tur e" cla content and crushabilit

have significant impact on crusher

capacit.

e e d


5/14

eed material characteristics 6perating par ameters

!hape of ; #.!.!. in pr oduct

#apacit increases

4 !etting increases -> Power draw decreases

1. #heck the str ok e

4 !troke increases -> #apacit increases4 !troke increases -> Power draw increases

,. #heck the cavit in use

4 Based on f eed si/e

4 Based on re:uired end product si/e which

gives re:uired setting range

4 #heck the crushing ratio.

7. #heck the wear profile of the liners3 *

distorted wear profile ma decr ease

capacit" increase wearing and incr ease

crushing f or ces


6/14

#


7/14

@

~

z --"'

-


8/14

'

~

4 ~F ......

F

...

. . .

• ..

~

."""•

4

~~ '-

...

' ..

•7

4 -


9/14

GP fine cone crusher cavit selection


10/14

C C

GP ineAifficultand

Aifficult and non ?edium and ?edium and non


11/14

( (

# D #oarse


12/14

When to change linersHiners must be changed bef or e

the are worn through in order to

prevent damage to frame or

head. Hiners should be changed

no later than when the * dimen-

sion is (-, mm depending oncrusher model.

Production aspects ma sometimes favour

changing of wear parts before the are

full utili/ed. 2ourl capacit or product

:ualit ma decrease towards the end of

liner life- time and it ma be economical to

change the liner before the end of its

lif etime.

* distorted wear profile tpicall causes a

reduction in capacit. 6ther smptoms of

distorted wear profiles are high power and pressure and short lif etime of wear parts. *

distorted wear profile ma lead to liners

having to be replaced before the are full

worn.


13/14

egal noticeetso reserves the right to make changes in

pecifications and other information con-

ined in this publication without prior

otice and the reader should in all cases

onsult metso to determine whether an

uch changes have been made. This manuala not be reproduced and is intended f or

he exclusive use of metso customer .

he terms and conditions governing the sale

f metso hardware products and the licens-

g and use of metso software products con-

sts solel of those set f or th in the wr itten

ontract between metso and its customer .

o statement contained in this publication"

cluding statements regarding capacit"

uitabilit for use" or per f or mance of pr od-

cts" shall be considered a warrant b

etso for an purpose or give rise to an

abilit of metso.

no event will metso be liable for an

cidental" indirect" special" or conse:uential

amages $including lost profits%" arising out

f or relating to this publication or the

infor- ation contained in it" even if metso

has

een advised" k new" or should have k nown

f the possibilit of such damages.

etso" 5(,. *ll rights r eser ved.

Hm

s

ta

n c

s

mt

T o

in

si c

N

in s

u

m li

0n

in

d o

m

b o

m


14/14

PBG Cone Crusher

Documents

Transcript of PBG Cone Crusher