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High efficiency
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Low initial and maintenance costs
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Highly adaptable and versatile
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Feed system extracts nibs and reduces wear
SEPAX Separator
01-02-251
Gramstrup Design ApS
F.L.Smidth is the leading supplier of separa-tors to the world’s cement industry, provid-ing various types of high-efficiency separa-tors for a wide range of applications. Decades of know-how in high-efficiency separation enables F.L.Smidth to supply the most suitable separator for almost any application. The SEPAX concept – intro-duced with the original SEPAX separator and later adopted for separators of derived design - has proved highly successful in the cement industry.
Low initial costs
The simple and space-saving design of the SEPAX makes it an economical investment. The separator is fitted within a self-support-ing shell structure, and the entire separator unit with cyclones is supported by one ring-shaped support only. Reducer and motor are placed in line with the bearing housing, forming a compact and rigid drive-line unit. Finally, the SEPAX has one feed point placed at a low level, minimising the height of the separator feed elevator and simplifying the layout.
The SEPAX top seal principle:
The air flow across the rotor seal area (1) is limited by narrow gaps (2)
Reduced air flow across the rotor top, fitted with deflector wings (3), practically eliminates passage of coarse material to the fines outlet (4)
Coarse material that is inclined to pass in a ballistic curve (5) across the rotor is intercepted by the chromium carbide protected seal ring (6)
Low initial cost • Self-supporting shell
structure
• Standard range drive parts • One support for the
complete separator • One feed point in low
position
• Most of the ducting integrated
Low operating costs • High-efficiency separation • Highly effective nibs
extraction minimises clogging of mill grates, thus enabling long-lasting full mill capacity Low maintenance costs • Wear protection selected
for cost efficiency and based on experience • Automatic grease
lubri-cation with enclosed refill system
• Practically eliminated nibs recirculation reduces maintenance work and downtime caused by clogged mill grates. • Designed to enable easy
access for inspection and replacement of compo-nents
Highly flexible and versa-tile. Adaptable to a wide range of grinding and dry-ing systems such as • All cement grinding ball
mill systems
• Fully or semi air-swept raw grinding ball mills • Flash driers
Main features
MILL SYSTEMS
Parallel flow through rotor for maximum equality, i.e.: sharpest possible separation
Rotor top principle Guide vane with
wear plate
Wear plate:
chromium carbide v - particle,
relative to rotor
v - particle, relative to stator
v - rotor SEPAX rotor and
guide vane detail
6 6 5 1 2 2 7 3 4 1731_M_FLS_SepaxSep.qxd 23/01/02 9:06 Side 1
F.L.Smidth is the leading supplier of separa-tors to the world’s cement industry, provid-ing various types of high-efficiency separa-tors for a wide range of applications. Decades of know-how in high-efficiency separation enables F.L.Smidth to supply the most suitable separator for almost any application. The SEPAX concept – intro-duced with the original SEPAX separator and later adopted for separators of derived design - has proved highly successful in the cement industry.
Low initial costs
The simple and space-saving design of the SEPAX makes it an economical investment. The separator is fitted within a self-support-ing shell structure, and the entire separator unit with cyclones is supported by one ring-shaped support only. Reducer and motor are placed in line with the bearing housing, forming a compact and rigid drive-line unit. Finally, the SEPAX has one feed point placed at a low level, minimising the height of the separator feed elevator and simplifying the layout.
The SEPAX top seal principle:
The air flow across rotor (1) is limited by narrow gaps (2) Reduced air flow across the rotor top, fitted with deflector wings (3), practically eliminates passage of coarse material to the fines outlet (4)
Coarse material that is inclined to pass in a ballistic curve (5) across the rotor is intercepted by the chromium carbide protected seal ring (6)
Flexible and versatile
The SEPAX is designed to be equipped with drives ranging from low power drives for raw grinding to powerful drives for the finest grinding while still utilising the full design air flow.
This ensures maximum efficiency regard-less of the end product quality specified.
The SEPAX can be equipped with separa-tor-supported cyclones or stand-alone cyclones for the collection of fines.
The feed concept is based on the material being suspended in the vertical air flow through the riser duct. This makes the SEPAX highly adaptable to various raw grinding applications. Consequently, the separator can be integrated into the mill venting system, in the case of fully or semi air-swept mills, or installed on top of a flash dryer that forms the riser duct leading up to the SEPAX.
Low operating costs
The SEPAX is very efficient in operation and cuts specific energy consumption to a mini-mum, while maintaining maximum output. A highly effective system for removal of worn grinding media from the mill dis-charge material means less clogging of diaphragms. This optimises mill performance and enables long-term continuous operation.
Low maintenance costs
The SEPAX is designed to be easily service-able. Worn and broken grinding media are not recycled, which helps to save mainte-nance work on the mill grate plates. The removal of nibs from the separator feed reduces the wear on critical separator parts. Easily accessible and serviceable wear pro-tection is fitted where appropriate and the bearing unit can easily be replaced. Low initial cost
• Self-supporting shell structure
• Standard range drive parts • One support for the
complete separator • One feed point in low
position
• Most of the ducting integrated
Low operating costs • High-efficiency separation • Highly effective nibs
extraction minimises clogging of mill grates, thus enabling long-lasting full mill capacity Low maintenance costs • Wear protection selected
for cost efficiency and based on experience • Automatic grease
lubri-cation with enclosed refill system
• Practically eliminated nibs recirculation reduces maintenance work and downtime caused by clogged mill grates. • Designed to enable easy
access for inspection and replacement of compo-nents
Highly flexible and versa-tile. Adaptable to a wide range of grinding and dry-ing systems such as • All cement grinding ball
mill systems
• Fully or semi air-swept raw grinding ball mills • Flash driers
Main features
MILL SYSTEMS
SEPAX system with bag filter for collection of fines: This system ensures maximum product cooling.
SEPAX system for raw grinding installation suitably integrated into the mill vent line
SEPAX system with cyclones for collection of fines: Lowest initial and operating costs. Recuperation of heat enhances drying of wet slag, puzzolana or other additives. Finished product New feed Nibs disposal Mill product Reject flow Finished product Reject flow Mill product New feed Finished product Nibs disposal Mill product Reject flow New feed 6 6 5 1 2 2 7 3 4 Air outlet Flexible coupling Motor Reducer Rotor
Reject collecting guide vanes
Planetary separator supported cyclone Ring shaped support
Fine material outlet Reject outlet cone valve Feed point
Pneumatic unloading valve Nibs disposal container
Parallel flow through rotor for maximum equality, i.e.: sharpest possible separation
Rotor top principle Guide vane with
wear plate
Wear plate:
chromium carbide v - particle,
relative to rotor
v - particle, relative to stator
v - rotor SEPAX rotor and
guide vane detail
1 10 100
Particle size, micron
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% d75 x50 d25 Per centage of feed r ejected
Tromp curve
The tromp curve indicating the per-centage of feed rejected in relation to particle size has the following characteristics:
The cut size, x50, expresses the exact particle size at which the quantities of fine and coarse material are equal. The by-pass value, , expresses the proportion of separator feed that passes through the separator unprocessed and leaves it as coarse material.
The sharpness factor, = d25/d75, expresses the inclination of the Tromp curve and thus the sharpness of the separation. 1 2 3 5 7 9 8 1 2 3 4 5 6 7 8 9 10 11 12 13 11 12 13 10 6
Air outlet Flexible coupling Motor
Reducer Rotor
Reject collecting guide vanes
Planetary separator supported cyclone Ring shaped support
Fine material outlet Reject outlet cone valve Feed point
Pneumatic unloading valve Nibs disposal container
1 10 100
Particle size, micron
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% d75 x50 d25 Per centage of feed r ejected
Tromp curve
The tromp curve indicating the per-centage of feed rejected in relation to particle size has the following characteristics:
The cut size, x50, expresses the exact particle size at which the quantities of fine and coarse material are equal. The by-pass value, , expresses the proportion of separator feed that passes through the separator unprocessed and leaves it as coarse material.
The sharpness factor, = d25/d75, expresses the inclination of the Tromp curve and thus the sharpness of the separation. 1 2 3 5 7 9 8 1 2 3 4 5 6 7 8 9 10 11 12 13 11 12 13 10 6 4 1731_M_FLS_SepaxSep 14/01/02 10:43 Side 3
Densit Wearcast 2000
The material is a 30 mm thick cement bound composition containing 55% hard (9 Mohs) grains of corundum (Al2O3). Densit Wearcast is easy to install and repair. It has been tested to outlast basalt by a factor of 1.3 when exposed to sandblasting at various inclinations.
Hardox 400
This is a world-known, abrasion resistant, weldable steel plate, which is through-hardened to more than 360 HB and is recognised for its superior abrasion resist-ance properties.
Chromium compound
wear plate
This material is a mild steel plate with a thickness of 4 to 8 mm on to which a 4 - 5 mm layer of hardfacing is welded. The hardfacing consists of primary chromium carbides in a eutectic matrix with eutectic chromium carbides. The hardness of the matrix reaches 600-750 HV, the grains 1400 HV. The temperature limit is 400 deg C.
High carbon steel
This is a low cost and highly versatile mate-rial which is used in places where moderate wear occurs.
Mild Steel
Wear Protection
Data in this brochure is intended for preliminary project planning only. Manufacturer reserves the right to modify equipment details and/or specifications without notice.
USA
F.L.Smidth Inc. 2040 Avenue C Bethlehem, PA 18017-2188 Tel: +1 610-264-6011 Tel: +1 800-523-9482 Fax: +1 610-264-6170 E-mail: [email protected]INDIA
Fuller India Limited Capital Towers
180, Kodambakkam High Road Nungambakkam Chennai 600 034 Tel: +91 44-827-6030/8228623 Fax: +91 44-827-9393 E-mail: [email protected]
DENMARK
F.L.Smidth A/S Vigerslev Allé 77 DK-2500 Valby Copenhagen Tel: +45 36 18 10 00 Fax: +45 36 30 18 20 E-mail: [email protected] www.flsmidth.com Up-to-date addresses of worldwide subsidiaries and sales offices areavailable from our website 01-02-251
Gramstrup Design ApS
Dimensions and characteristics
D C C E A2 A1 B B
190 7.3 3108 N.A. 5704 N.A. 1900 N.A.
212 10.0 3500 6467 2120 236 13.5 3933 7296 2360 250 15.7 4189 3754 7772 3040 2500 840 265 18.3 4460 4004 8285 3258 2650 900 280 21.1 4736 4262 8792 3492 2800 965 300 25.1 5102 4608 9468 3800 3000 1050 315 28.3 5376 4862 9975 4036 3150 1115 335 32.8 5746 5213 10647 4344 3350 1200 355 375 42.9 6485 5907 11989 4976 3750 1375 400 49.9 6947 6342 12822 5374 4000 1485
N.A. N.A. N.A.
N.A. N.A. N.A.
37.7 6115 5558 11319 4668 3550 1290 425 57.4 7412 6781 13656 5772 4250 1595 450 65.4 7876 7217 14488 6154 4500 1700 475 73.9 8341 7652 15321 6552 4750 1810 500 83.0 8807 8088 16152 6932 5000 1915 530 94.5 9365 8611 17148 7402 5300 2045 560 106.8 9923 9130 18145 7872 5600 2175
Size Air flow A1 A2 B C D E
m3/s mm mm mm mm mm mm