8/12/2019 Diaphragms 1
1/44
Grinding MillsOPTIMISATION
Magotteaux / Slegten / Sturtevant
Solutions
8/12/2019 Diaphragms 1
2/44
1
2&3
4
5
1Pre-grinding
2Mill division
3Internal equipment4High efficiency
separator
5Mill control system
DIAPHRAGMS
8/12/2019 Diaphragms 1
3/44
DIAPHRAGMS
8/12/2019 Diaphragms 1
4/44
Definition
Functions
ComponentsFrame
Lifters design
Central screen design
Wear partsMAGOTTEAUX range of diaphragms
DIAPHRAGMS
8/12/2019 Diaphragms 1
5/44
Common features to all the
Magotteaux diaphragms
division of the frame in independent sectors fitted on a circular
peripheral steel plate
measured up to 18 mm dyn amic var iat ion o f the diameter
DIAPHRAGMS
Components
Frame
8/12/2019 Diaphragms 1
6/44
Deformation
mm
Thickness
mm
50 65 74 5065
3,34,3
6,99,29
diaphragm
CCB
shel l 4400 X 16110 m
Shell length = 16110 mm
DIAPHRAGMS
Components
Frame
Common features to all the
Magotteaux diaphragms
division of the frame in independent sectors fitted
on a circular peripheral steel plate
8/12/2019 Diaphragms 1
7/44
Mill diam.
in meter
Deformation
D-d in mm
1
1.2
1.4
1.6
1.82
2.2
2.4
2.6
2.8 4
3
3.2
3.4
3.6
3.8 8.14
4.2
4.4 12
4.6
4.8
5.2
5.4 17
5.6
5.8
6
D - d = shell deformation
for sect io n located at
half distance of the two
bear ings versus
m il l diameter
DIAPHRAGMS
ComponentsFrame
Common features to all the
Magotteaux diaphragms
8/12/2019 Diaphragms 1
8/44
1st cpt.2nd cpt.Result
Sections views from
1st compartment
looking in the
direction of the
outlet
DIAPHRAGMS
ComponentsFrame
8/12/2019 Diaphragms 1
9/44
1st solution
DIAPHRAGMS
ComponentsFrame
8/12/2019 Diaphragms 1
10/44
1re solution
DIAPHRAGMS
ComponentsFrame
8/12/2019 Diaphragms 1
11/44
2nd solution
DIAPHRAGMS
ComponentsFrame
8/12/2019 Diaphragms 1
12/44
Lifters Concept
DIAPHRAGMS
Components
Each diaphragm component must be designed in
to allow the diaphragm to fulfill its functions
These chapter is devoted to a detailed study
of each of them:
FrameCentral screen design
Lifters design & Wear parts
8/12/2019 Diaphragms 1
13/44
2me solution
DIAPHRAGMS
ComponentsFrame
8/12/2019 Diaphragms 1
14/44
DIAPHRAGMS
Components Frame
8/12/2019 Diaphragms 1
15/44
DIAPHRAGMS
Components Frame
8/12/2019 Diaphragms 1
16/44
DIAPHRAGMS
Components Frame
8/12/2019 Diaphragms 1
17/44
DIAPHRAGMS
Components Frame
8/12/2019 Diaphragms 1
18/44
DIAPHRAGMS
Components Frame
8/12/2019 Diaphragms 1
19/44
DIAPHRAGMS
Components Frame
8/12/2019 Diaphragms 1
20/44
2me solution
DIAPHRAGMS
Components Frame
8/12/2019 Diaphragms 1
21/44
Lifters Concept
DIAPHRAGMS
Components
Each diaphragm component must be designed in
to allow the diaphragm to fulfill its functions
These chapter is devoted to a detailed study
of each of them:
Frame Central screen designLifters design& Wear parts
8/12/2019 Diaphragms 1
22/44
Central screen design
DIAPHRAGMS
8/12/2019 Diaphragms 1
23/44
Central screen design
DIAPHRAGMS
8/12/2019 Diaphragms 1
24/44
Central screen design
DIAPHRAGMS
8/12/2019 Diaphragms 1
25/44
Central screen design
DIAPHRAGMS
8/12/2019 Diaphragms 1
26/44
Lifters Concept
DIAPHRAGMS
Components
Each diaphragm component must be designed in
to allow the diaphragm to fulfill its functions
These chapter is devoted to a detailed study
of each of them:
FrameCentral screen design
Lifters Design &Wear parts
8/12/2019 Diaphragms 1
27/44
HRc HRc
60
50
40
30
Hardness
HRc
20 mm 20 mm
tickness 40 mm
DIAPHRAGMS
Components Wear parts
Rolled steel parts
8/12/2019 Diaphragms 1
28/44
Depth in mm
external surface
external surface 33
38
59
60
Gratetickness40
mm
HRc
3mm5mm
7mm
6mm3mm
martensite
perlite
HARDNESS OF ROLLED GRATES
VERSUS DEPTH OF THE
HEAT TREATMENT
DIAPHRAGMS
Components Wear partsRolled steel parts
8/12/2019 Diaphragms 1
29/44
Depth in mmexternal surface
external surface
60
Gr
atetickness50m
m
HRc
2mm
2mm
42
Cast alloy parts
CAST GRATES HARDNESS
VERSUS DEPTH OF THEHEAT TREATMENT
DIAPHRAGMS
Components Wear parts
8/12/2019 Diaphragms 1
30/44
DIAPHRAGMS
Components Wear partsCast alloy parts
8/12/2019 Diaphragms 1
31/44
DIAPHRAGMS
Components Wear partsCast alloy parts
8/12/2019 Diaphragms 1
32/44
Filling rings
DIAPHRAGMS
Components Wear parts
8/12/2019 Diaphragms 1
33/44
DIAPHRAGMS
Magotteaux range of diaphragms
Opticontrol adjustable fabricated steel frame intermediate diaph.
Optimex fabricated steel frame outlet diaphragm
Optidry fabricated steel frame transfer diaphragm
Optidry cast cast steel frame transfer diaphragm
Optiflow fabricated steel frame peripheral discharge diaphragm
Opticast adjustable cast frame intermediate diaphragm
for wet processOpticastex adjustable cast frame outlet diaph. for wet process
Optiwear cast frame intermediate diaphragm for dry process
Airfeel adjustable cast frame intermediate diaphragm fordry process (adjustment from mill ventilation)
MAGOTTEAUX RANGE OF BALL MILL INTERNAL EQUIPMENTDIAPHRAGMS
8/12/2019 Diaphragms 1
34/44
DIAPHRAGMS
Common features to all the
Magotteaux diaphragms
division of the frame in independent sectors fitted
on a circular peripheral steel plate
independent center part, free to move radially
exceptional wear resistance of the grates and backside plates
permanent evolution of the design to improve the performances
basic design for each of them with small possible adaptations
in view of the particular cases
MAGOTTEAUX RANGE OF BALL MILL INTERNAL EQUIPMENTDIAPHRAGMS
8/12/2019 Diaphragms 1
35/44
DIAPHRAGMS
OPTIMEXfabricated steel frame
outlet diaphragm
Special features :
Maximum opening for the ventilation in the center
Lifters with different lengths
8 mm slots grates
MAGOTTEAUX RANGE OF BALL MILL INTERNAL EQUIPMENTDIAPHRAGMS
DIAPHRAGMS
8/12/2019 Diaphragms 1
36/44
DIAPHRAGMS
cast steel frame transfer diaphragm
Special features :
frame sectors in resilient and high wearresistant cast steel
assembly by bolting only
6 mm slots
exceptional open surface area
for the drying gases
OPTIDRY CAST
MAGOTTEAUX RANGE OF BALL MILL INTERNAL EQUIPMENTDIAPHRAGMS
DIAPHRAGMS
8/12/2019 Diaphragms 1
37/44
fabricated steel frame
peripheral discharge diaphragm
Special features :
retaining dam in the diaphragm
behind the first chamber grates
strong frame design
OPTIFLOW
MAGOTTEAUX RANGE OF BALL MILL INTERNAL EQUIPMENTDIAPHRAGMS
DIAPHRAGMS
8/12/2019 Diaphragms 1
38/44
DIAPHRAGMS
AIRFEEL
adjustable cast frame intermediate
diaphragm for dry process(adjustment from mill ventilation)
Special features :
Adjustment of the material level
in the first chamber by the
ventilation
Frame sectors in resilient and
high wear resistant cast steel
Assembly by bolting only
6 mm slots on the front grates
12 mm slots on the backside
grates
MAGOTTEAUX RANGE OF BALL MILL
INTERNAL EQUIPMENT
DIAPHRAGMS
DIAPHRAGMS
8/12/2019 Diaphragms 1
39/44
DIAPHRAGMS
OPTICAST
adjustable cast frame intermediate
diaphragm for wet process
adjustable cast frame outlet
diaphragm for wet process
OPTICASTEX
MAGOTTEAUX RANGE OF BALL MILL INTERNAL EQUIPMENTDIAPHRAGMS
8/12/2019 Diaphragms 1
40/44
8/12/2019 Diaphragms 1
41/44
8/12/2019 Diaphragms 1
42/44
8/12/2019 Diaphragms 1
43/44
8/12/2019 Diaphragms 1
44/44
Top Related