■ High efficiency

■ Low initial and maintenance costs

■ Highly adaptable and versatile

■ Feed system extracts nibs and reduces wear

SEPAX Separator

01-0

2-25

1G

ram

stru

p D

esig

n A

pS1731_M_FLS_SepaxSep 14/01/02 10:44 Side 6

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-efficiencyseparation enables F.L.Smidth to supply themost suitable separator for almost anyapplication. The SEPAX concept – intro-duced with the original SEPAX separatorand later adopted for separators of deriveddesign - has proved highly successful in thecement industry.

Low initial costsThe simple and space-saving design of theSEPAX makes it an economical investment.The separator is fitted within a self-support-ing shell structure, and the entire separatorunit with cyclones is supported by one ring-shaped support only. Reducer and motorare placed in line with the bearing housing,forming a compact and rigid drive-line unit.Finally, the SEPAX has one feed point placedat a low level, minimising the height of theseparator feed elevator and simplifying thelayout.

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 minimisesclogging of mill grates,thus enabling long-lasting full mill capacity

Low maintenance costs• Wear protection selected

for cost efficiency andbased on experience

• Automatic grease lubri-cation with enclosedrefill system

• Practically eliminatednibs recirculation reducesmaintenance work anddowntime caused byclogged mill grates.

• Designed to enable easyaccess for inspection andreplacement of compo-nents

Highly flexible and versa-tile. Adaptable to a widerange 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

MI

LL

S

YS

TE

MS

Parallel flow through rotor for maximum equality, i.e.:

sharpest possible separation

Rotor top principle

Guide vane withwear plate

Wear plate:chromium carbide

v - particle,relative to rotor

v - particle, relative to stator

v - rotor

SEPAX rotor andguide 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-efficiencyseparation enables F.L.Smidth to supply themost suitable separator for almost anyapplication. The SEPAX concept – intro-duced with the original SEPAX separatorand later adopted for separators of deriveddesign - has proved highly successful in thecement industry.

Low initial costsThe simple and space-saving design of theSEPAX makes it an economical investment.The separator is fitted within a self-support-ing shell structure, and the entire separatorunit with cyclones is supported by one ring-shaped support only. Reducer and motorare placed in line with the bearing housing,forming a compact and rigid drive-line unit.Finally, the SEPAX has one feed point placedat a low level, minimising the height of theseparator feed elevator and simplifying thelayout.

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 versatileThe SEPAX is designed to be equipped withdrives ranging from low power drives forraw grinding to powerful drives for thefinest grinding while still utilising the fulldesign 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-alonecyclones for the collection of fines.

The feed concept is based on the materialbeing suspended in the vertical air flowthrough the riser duct. This makes theSEPAX highly adaptable to various rawgrinding applications. Consequently, theseparator can be integrated into the millventing system, in the case of fully or semiair-swept mills, or installed on top of a flashdryer that forms the riser duct leading up tothe SEPAX.

Low operating costsThe SEPAX is very efficient in operation andcuts specific energy consumption to a mini-mum, while maintaining maximum output.A highly effective system for removal ofworn grinding media from the mill dis-charge material means less clogging ofdiaphragms. This optimises mill performanceand enables long-term continuous operation.

Low maintenance costsThe SEPAX is designed to be easily service-able. Worn and broken grinding media arenot recycled, which helps to save mainte-nance work on the mill grate plates. Theremoval of nibs from the separator feedreduces the wear on critical separator parts.Easily accessible and serviceable wear pro-tection is fitted where appropriate and thebearing 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 minimisesclogging of mill grates,thus enabling long-lasting full mill capacity

Low maintenance costs• Wear protection selected

for cost efficiency andbased on experience

• Automatic grease lubri-cation with enclosedrefill system

• Practically eliminatednibs recirculation reducesmaintenance work anddowntime caused byclogged mill grates.

• Designed to enable easyaccess for inspection andreplacement of compo-nents

Highly flexible and versa-tile. Adaptable to a widerange 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

MI

LL

S

YS

TE

MS

SEPAX system with bag filter for collection of fines: This system ensures maximum product cooling.

SEPAX system for raw grinding installationsuitably integrated into themill vent line

SEPAX systemwith cyclones forcollection of fines: Lowest initial andoperating costs.Recuperation ofheat enhancesdrying of wet slag, puzzolana orother additives.

Finishedproduct

New feed

Nibsdisposal

Mill product

Reject flow

Finishedproduct

Reject flow

Mill product

New feed

Finishedproduct

Nibs disposal

Mill product

Reject flowNew feed

6 6

5

1

2 2

7

3

4

Air outletFlexible couplingMotorReducerRotorReject collecting guide vanesPlanetary separator supported cycloneRing shaped supportFine material outletReject outlet cone valveFeed pointPneumatic unloading valveNibs disposal container

Parallel flow through rotor for maximum equality, i.e.:

sharpest possible separation

Rotor top principle

Guide vane withwear plate

Wear plate:chromium carbide

v - particle,relative to rotor

v - particle, relative to stator

v - rotor

SEPAX rotor andguide vane detail

1 10 100

Particle size, micron

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

d75x50

d25

Perc

enta

ge

of

feed

rej

ecte

d

Tromp curve

The tromp curve indicating the per-centage of feed rejected in relationto particle size has the followingcharacteristics:The cut size, x50, expresses the exactparticle size at which the quantitiesof fine and coarse material are equal.The by-pass value, , expresses theproportion of separator feed thatpasses through the separatorunprocessed and leaves it as coarsematerial.The sharpness factor, = d25/d75,expresses the inclination of theTromp curve and thus the sharpnessof 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 outletFlexible couplingMotorReducerRotorReject collecting guide vanesPlanetary separator supported cycloneRing shaped supportFine material outletReject outlet cone valveFeed pointPneumatic unloading valveNibs disposal container

1 10 100

Particle size, micron

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

d75x50

d25

Perc

enta

ge

of

feed

rej

ecte

d

Tromp curve

The tromp curve indicating the per-centage of feed rejected in relationto particle size has the followingcharacteristics:The cut size, x50, expresses the exactparticle size at which the quantitiesof fine and coarse material are equal.The by-pass value, , expresses theproportion of separator feed thatpasses through the separatorunprocessed and leaves it as coarsematerial.The sharpness factor, = d25/d75,expresses the inclination of theTromp curve and thus the sharpnessof 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 2000The material is a 30 mm thick cementbound 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 afactor of 1.3 when exposed to sandblastingat various inclinations.

Hardox 400 This is a world-known, abrasion resistant,weldable steel plate, which is through-hardened to more than 360 HB and isrecognised for its superior abrasion resist-ance properties.

Chromium compound wear plate

This material is a mild steel plate with athickness of 4 to 8 mm on to which a 4 - 5 mm layer of hardfacing is welded. Thehardfacing consists of primary chromiumcarbides in a eutectic matrix with eutecticchromium carbides. The hardness of thematrix reaches 600-750 HV, the grains 1400HV. The temperature limit is 400 deg C.

High carbon steelThis is a low cost and highly versatile mate-rial which is used in places where moderatewear occurs.

Mild Steel

Wear Protection

1731_M_FLS_SepaxSep 14/01/02 10:43 Side 4

Data in this brochure is intended for preliminary project planning only. Manufacturer reserves the right to modify equipment details and/or specifications without notice.

USAF.L.Smidth Inc.2040 Avenue CBethlehem, PA 18017-2188Tel: +1 610-264-6011Tel: +1 800-523-9482Fax: +1 610-264-6170E-mail: info@flsmidth.com

INDIAFuller India LimitedCapital Towers180, Kodambakkam High RoadNungambakkamChennai 600 034Tel: +91 44-827-6030/8228623Fax: +91 44-827-9393E-mail: fil@fullerindia.co.in

DENMARK F.L.Smidth A/SVigerslev Allé 77DK-2500 ValbyCopenhagenTel: +45 36 18 10 00Fax: +45 36 30 18 20E-mail: info@flsmidth.com

www.flsmidth.com

Up-to-date addresses of worldwidesubsidiaries and sales offices are available from our website

01-0

2-25

1G

ram

stru

p D

esig

n A

pS

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 Em3/s mm mm mm mm mm mm

1731_M_FLS_SepaxSep 14/01/02 10:43 Side 5