Basic Data you will require
The type of material being fed, the angle of repose and weight per cubic foot (kg/ m.cu). A rough calculation of the material sizes. The greatest dimension of the biggest piece. Needed feeder conveying distance. Ideal feeder capacity.
STEP 1: With the help of computed precision of big size materials, ideal width of the feeder is selected from Table A. Multiply this factor by the greatest dimension of the material's largest piece to determine minimal width of feeder width. There is also a throat opening factors where the use of a four-sided hopper is done. To find the minimal hopper throat opening proper factors are selected and multiplied by the same largest dimension.
STEP 2: Determine the different combinations of feeder slopes and widths available for the needed capacity. Neglect any which are tinier in width than the minimum feeder width calculated before. It may become necessary to enhance the minimum width of the feeder in order to gain the desired capacity. If so, ignore minimum width from previous step and substitute with the altered minimum feeder width for the needed capacity.
STEP 3: Now regard feeder length. Generally the positioning and size of companion equipment like conveyors, crushers, hoppers, aprons, chutes, etc. propose the given to minimized length of the feeder pan. Also, the pan could not be shorter than that which is required to hold the material at its repose angle on the pan after the shutting down of the feeder. Find out minimum pan lengthen make your own scaled diagram to demonstrate the angle of repose and slope of feeder on the rest and pan. Enable the throat opening of the proper hopper when utilizing a hopper with four sides. Add 12" (30 cm) to the length of the pan as a factor of safety to forestall the material from continuing to freely flowing. After this, add the length of any grizzly sections which is needed to the minimum pan length to ascertain the minimum feeder length.
STEP 4: Again evaluate slopes, width and capacities. Regard headroom and feeder length needs. Match these with location, critical dimensions and elevations of associated equipment. Recollect to allow for future demand of increase in capacity. Now select the slope/ width combination which matches the desired capacity and which is ideal for the particular installation and application. You would need to go steeper and narrower to match up with a crusher opening; possibly wider to have feed from an active apron conveyor. Or, you may need to go wider with comparatively less slopes to suit the limits of elevation. You are possibly to discover that although over one size feeder will fulfill your capacity needs, one specific width/ length/ slope combination optimally serves your predefined needs.
The straight-line motion by VGF Series and grizzly feeders are for regulated feeding of primary crushers after screening.
VGC Series Primary vibrating feeders mix run-of-quarry scalping and feeding oversize retained by grizzly bars to crusher. Fines passing the bars of steel spacing such as crusher jaw setting, could be directly sent to screening.
Max. capacity working of the Crusher with low depreciation since the chamber for crushing is not filled with materials of undersize.
Grizzly fines, released by belt conveyor, crushed prod, safeguard the rubber belt from shearing and attrition owing to the discharge of product from primary crusher.
Table A-Section Factors
Percentage Large Size*
Feeder with Factor
Hopper throat Factor
1-10%
1.3
1.5
10-40%
1.5
2
40-60%
2
2.5
60-90%
2.5
3
90-100%
3
3.5
*Those pieces which have a size range of 75 to 100% of the greatest piece. If the largest piece is 91cm (36") then "largesize" are all pieces 69 cm (27") and larger.
Capabilities founded on material weighing 1600 kg/m.cu. (100 Ib./ft.cu), 30 cm(12") material bed depth and 13 mm (1/2") stroke at the rate of 800 RPM.
Slope of Pan
Feeder Width in mm/tons per House
800
900
1100
1200
1400
1500
1800
2000
2500
0 DEG
275
350
400
475
525
600
725
850
1000
5 DEG
375
450
525
600
675
750
900
1050
1160
10 DEG
450
550
650
725
825
900
1075
1250
1440
15DEG
550
650
750
850
975
1075
1300
1500
1850
Size
VGF 800
VGF 900
VGF 1100
VGF 1200
VGF 1400
VGF 1500
VGF 1800
VGF 2000
VGF 2500
Size of
800
900
1100
1200
1400
1500
1800
2000
2500
feed
deck
width
Grizzly
1600
1700
1800
2000
2400
2500
2600
3000
3200
length
Total
2800
3000
3300
3600
4200
4400
4600
5600
6600
length
Grizzly
50/
50/
50/
507
507
507
507
507
507
bars-
150
180
200
200
250
250
300
350
400
openings
Max. feed
500
600
700
800
1000
1100
1200
1400
1600
size mm
Max.
250
350
400
480
640
750
1040
1200
1400
capacity
TPH
Horse
15
20
25
30
30
40
50
75
100
power
Wt.
3500
4200
5200
6500
8800
9800
12200
14600
16200
Kgs.
Mode
A
B
C
D
E
F
G
VGF 800
2800
800
1950
535
730
1290
1180
VGF 900
3000
900
2200
560
780
1350
1300
VGF 1000
3300
1100
2400
590
800
1400
1450
VGF 1200
3600
1200
2510
590
875
1460
1620
VGF 1400
4200
1400
2935
675
1000
1640
1800
VGF 1500
4400
1500
3100
700
1020
1720
2100
VGF 1800
4600
1800
3180
790
1190
1880
2275
VGF 2000
5600
2000
3500
900
1200
2000
2400
VGF 2500
6600
2500
4100
1100
1500
2200
2600
Grizzly Feeders are employed in a wide range of sectors and businesses, including mining, quarrying, construction, recycling, and bulk material handling. These industries have an urgent need for reliable solutions to properly manage resources and assure continuous operations. Grizzly Feeders are used by businesses and organizations to increase production, reduce downtime, and provide effective material separation and screening. These feeders, known for their dependability, enable a regular and uninterrupted flow of supplies. They prove to be vital assets by lowering maintenance expenses and downtime while increasing productivity and cost-effectiveness.
What is a grizzly feeder?
A grizzly feeder is a vibrating machine that removes fines and undersized particles from feed material before it enters the primary crusher or processing equipment.
What are the advantages of a grizzly feeder?
The feeder's efficiency and output have increased. Its use results in reduced maintenance needs and equipment protection.
What materials may be treated with grizzly feeders?
Aggregates, minerals, ores, and many forms of industrial materials can all be handled using grizzly feeders.
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