PURPOSE BUILT DIAGNOSTIC TOOL FOR MAGNETIC WET DRUM ... · OF THE DRUM PURPOSE BUILT DIAGNOSTIC...
Transcript of PURPOSE BUILT DIAGNOSTIC TOOL FOR MAGNETIC WET DRUM ... · OF THE DRUM PURPOSE BUILT DIAGNOSTIC...
HERE’S WHAT THE RESULTS MEAN...
In this instance the irregular field pattern was due to the magnets having moved within the assembly. Other irregularities were due to faulty repair work, magnetite ingress covering the magnets and magnets damaged due to wear and tear while rubbing on the skin. All result in increased operating costs.
Purpose Built Test Equipment for Magnetic Wet Drum Separators (Patent Pending)
PURPOSE BUILT DIAGNOSTIC TOOL FOR MAGNETIC WET DRUM SEPARATORS
INTERNATIONAL MAGNETIC SOLUTIONS p: +61 2 4987 3912 • [email protected] • www.magneticmining.com.au
The IMS diagnostic procedure accurately measures the strength, direction and position of the alternating magnetic field pattern produced by the drum in 3 locations along the axis of the drum, at the Drive End, Centre and Non Drive end.
HERE’S HOW THE DIAGNOSTIC TOOL WORKS...
A series of accurate curves clearly showing the magnetic profile. If they have a standard even shape the magnets are in good working order. A distorted shape means there is a problem and the system is not operating efficiently.HERE ARE THE RESULTS...
INTERNATIONAL MAGNETIC SOLUTIONS TEST RESULT SHEET
Drum No 1233 Test No 1234
Company Coal CompanyDrum Description Primari 1 SepDrum Size D915x2800 mmDrum Make IMS
2011-06-23 12:53 Job No 234
Report on Results:Magnets readings indicate ingress of magnetite and movement of magnetsThe magnet location is good but the fields are weak and the system is in need of repair. It is suggested that the drum be taken out of service.IMS can repair the drum and reposition the magnet banks.
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-1500
-1000
-500
0
500
1000
1500
2000
10 75 140
211
301
391
475
545
641
730
795
860
925
990
1055
1120
1185
1250
1315
1380
1445
1510
1575
1640
D Vert 3
D HOR 3
C Vert 2
C HOR 2
NDE Vert 3
NDE HOR 3
NDE Vert 4
NDE HOR 4
Mark
INTERNATIONAL MAGNETIC SOLUTIONS TEST RESULT SHEET
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-1000
-500
0
500
1000
1500
2000
10 70 130
195
280
355
440
510
576
675
745
805
865
925
985
1045
1105
1165
1225
1285
1345
1405
1465
1525
1585
1645
D HOR 3
C HOR 2
NDE HOR 3
NDE HOR 4
Mark
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-1000
-500
0
500
1000
1500
2000
10 70 130
195
280
355
440
510
576
675
745
805
865
925
985
1045
1105
1165
1225
1285
1345
1405
1465
1525
1585
1645
D Vert 3
C Vert 2
NDE Vert 3
NDE Vert 4
Mark
INTERNATIONAL MAGNETIC SOLUTIONS TEST RESULT SHEET
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0
500
1000
1500
2000
10 70 130
195
280
355
440
510
576
675
745
805
865
925
985
1045
1105
1165
1225
1285
1345
1405
1465
1525
1585
1645
D Vert 3
D HOR 3
Mark
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-500
0
500
1000
1500
2000
10 70 130
195
280
355
440
510
576
675
745
805
865
925
985
1045
1105
1165
1225
1285
1345
1405
1465
1525
1585
1645
C Vert 2
C HOR 2
Mark
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-500
0
500
1000
1500
2000
10 70 130
195
280
355
440
510
576
675
745
805
865
925
985
1045
1105
1165
1225
1285
1345
1405
1465
1525
1585
1645
NDE Vert 3
NDE HOR 3
Mark
DE Drive End C Centre NDE Non Drive End V Vertical Magnetic Field H Horizontal Magnetic Field
H
V
H
V
V
V V H
H
H
H
Drive Side
DE C NDE
300 300
Direction Readings taken
Magnet Bank
Drum
Magnet Bank
Drum
Vertical
Drive Side
Magnet Bank
Horizontal
DE Drive End C Centre NDE Non Drive End V Vertical magnetic FieldH Horizontal Magnetic Field
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0
500
1000
1500
DE Vert 1
DE HOR 1
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0
500
1000
1500
DE Vert 1 REP
DE HOR 1 REP
BEFORE REPAIR AFTER REPAIR
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0
500
1000
1500
2000
DE Vert 1
DE HOR 1
Mark5 75 145
215
285
355
425
495
565
635
705
775
845
915
985
1055
1125
1195
1265
1335
1405
1475
1545
1615
1685
Magnetic Field Strength Around Drum
Mag
netic
Fie
ld S
tren
gth
Gau
ss
Distance Around Drum Anti Clockwise From Drive Side
HERE ARE A COUPLE OF EXAMPLES OF WHAT WE FIND WHEN THERE ARE ANOMALIES IN THE MAGNETIC DIAGNOSTIC RESULT GRAPHS:
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0
500
1000
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10 60 110
160
221
290
355
430
490
540
611
685
745
795
845
895
945
995
1045
1095
1145
Mag
netic
Fie
ld S
tren
gth
Gau
ss
Distance Around Drum in mmAnti Clockwise from Drive Side
Magnetic Field Strength Around Drum
D Vert 3 D HOR 3
NORTH POLE
SOUTH POLE
0
500
1000
1500
0 0 0 0 1 0 5 0 0 0 1 5 5 5 5 5 5 5 5 5 5eld
Stre
ngth
Gau
ss
Magnetic Field Strength Around Drum
D Vert 3
VERTICAL FIELD RADIATING OUT FROM THE DRUM
FIELD IN NORTH TO SOUTH POLE DIRECTION
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10 60 110
160
22 290
355
430
490
540
61 685
745
795
845
895
945
995
104 5
109 5
1145
Mag
netic
Fi e
Distance Around Drum in mmAnti Clockwise from Drive Side
FIELD IN SOUTH TO NORTH POLE DIRECTION
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0
500
1000
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2000
10 60 110
160
221
290
355
430
490
540
611
685
745
795
845
895
945
995
1045
1095
1145
Mag
netic
Fie
ld S
tren
gth
Gau
ss
Distance Around Drum Anti Clockwise from Drive Side
Magnetic Field Strength Around Drum
D HOR 3
FIELD IN NORTH TO SOUTH POLE DIRECTION
FIELD IN SOUTH TO NORTH POLE DIRECTION
HORIZONTAL FIELD IN A PATH PARALLEL TO THE CIRCUMFERANCE OF THE DRUM
PURPOSE BUILT DIAGNOSTIC TOOL FOR MAGNETIC WET DRUM SEPARATORS
INTERNATIONAL MAGNETIC SOLUTIONS p: +61 2 4987 3912 • [email protected] • www.magneticmining.com.au
The magnetic field coming from the drum is made using a series of magnets inside the drum. These magnets are arranged in alternating North South pattern facing radially from the drum. This arrangement creates a magnetic field profile that may be described as having 2 major directional components. One component (the Vertical) is in a radial direction from the drum while the other component (the Horizontal) follows around the circumference of the drum. They both alternate varying in strength and North South direction around the circumference of the drum.
WHAT TESTING SHOWS:The IMS testing procedure accurately measures the strength and position of these alternating Field patterns in 3 locations along the axis of the drum. At the Drive End, Centre and Non Drive end.
The graphical results show how these fields vary in strength and polarity. The graphs shown here indicate the North Pole in red portion and the South Pole in Blue portion of the graph. The test results show the Vertical and Horizontal field patterns together and separately at each test position.
These field patterns directly influence the recovery efficiency of the drum. Any alteration to the magnetic field pattern will result in lower recovery and higher magnetite losses.
The IMS system is so precise and accurate that any alteration to the magnetic system will show an obvious distortion to the pattern on the graphs.
DRUM MAGNET CONSTRUCTION:
Broken Magnet Banks showing significant differences in magnetic profile
Covered Magnets
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1000
Magnetite Covered
Crear Magnet
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1500
Damaged Magnet Bank Profile
Normal Magnet Bank Profile
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Damaged Magnet Bank Profile
Normal Magnet Bank Profile
You already know your plant is wasting Magnetite but you need to be absolutely sure that the drums are faulty before you commit to the significant expense of pulling them out of service.
The IMS test results will confirm if the condition of the Magnetic Wet Drum Separators are a contributing factor. The IMS test results will also give you the information you need to confidently decide whether you simply need to adjust them or go to the significant expense of pulling them out of service for repairs.
A basic test with a standard hand held probe will not give you the accurate repeatable information you need to make any decision with confidence.
Because the results from the IMS testing equipment and procedure are spot on accurate. If the results indicate an internal problem you can be sure it exists and that IMS can accurately interpret the results and advise if the drum should be pulled out for repair.
WHY USE THE IMS DIAGNOSTIC TOOL?