Grizzly Rockbreaker Applications



 

Underground mining operations typically use a steel grate called a grizzly to size material before it enters an ore pass. Material that is too large cannot pass through the openings in the grizzly and are left on top of the grizzly to be broken by a Rockbreaker, while the smaller material is allowed to pass through the grizzly down the ore pass.

Grizzly applications are extremely harsh by nature. The boom is subject to high degrees of in-line and side raking, combined with various sizes and amounts of oversize. BTI’s grizzly booms are designed with wide boom cross sections, extra large pins and reinforced high tensile steel plates. All designed to handle complex loading to the boom.



 

Grizzly Coverage:

The boom you choose to carry the selected breaker depends on its ability to provide full coverage of the area where material will require breaking, racking or clearing.

Breaker power required is determined by the hardness, toughness and size of material to be broken. The size of your crusher or grizzly also affects the selection size of breaker.

Hydraulic Breakers for Grizzly Applications

Hydraulic Breakers

 

BX20

BX30

BX40

BXR50

BXR65

BXR85

Energy Class ft-lbs
Joules
2,000
2,700
3,000
4,100
4,000
5,400
5,000
6,800
6,500
8,800
8,500
11,500
Operating Weight
(including top bracket)
lbs
kg
2,050
930
2,668
1,210
3,830
1,740
4,200
1,900
4,860
2,200
6,500
2,950
Overall Length
(including standard bracket)
in
mm
88
2,225
97
2,455
109
2,760
103
2,622
112
2,863
127
3,241
Oil Flow Range gpm
lpm
24-29
90-110
27-37
100-140
29-42
110-160
40-53
150-200
42-56
158-210
46-61
173-230
Working Pressure Range psi
bar

1,740-2,300
120-160

1,740-2,450
120-170
1,900-2,450
130-170
2,250-2,755
155-190
2,250-2,755
155-190
2,250-2,755
155-190
Blow Rate
Blow Rate - High Speed
bpm
bpm
350-550
500-750
350-550
500-850
350-500
450-600
387-589
445-804
335-514
385-684
285-435
328-578
Tool Diameter in
mm
4.1
105
4.7
120
5.3
135
5.5
140
6.0
150
6.3
160
Exposed Tool Length in
mm
21.3
538
26.5
668
26.5
668
25.1
635
26.2
665
29.0
745

* the maximum bpm includes the effects of the energy recovery system

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