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Rotary Kiln

Mechanical Training 

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Content:

•  Kiln General

•  Kiln Inlet Including Seal

•  Kiln Outlet Including Seal

•  Kiln Shell

•  Splined Kiln Tire

•  Floating Kiln Tire

•  Supporting Roller Station

•  Kiln Drives

•  Kiln Hood

•  Maintenance, Lurication

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POLRO ®  2-support rotary kiln

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Kiln General 

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Rotary kiln assembly

! Rotar" #iln shell $ Guard %or rac# and pinion drive

& Kiln inlet 'ith inlet seal 'ith lurication device( Tires 'ith %astening ) Kiln drive

s"ste* + Kiln outlet 'ith outlet seal

Supporting roller stations !- Kiln hood

. Kiln longitudinal guide !! /lin#ering 0one cooling 1optional2

3 Rac# and pinion drive

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!e POLRO 2 - support kiln

•  splined tires 1cold gap -452

•  sel%6aligning rollers•  direct drive via supporting rollers•  pneu*aticall" applied inlet and outlet seals•  air cooled #iln inlet tra"

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Pro#ess - te#!nologi#al $imensions

%iln &it! pre!eater 

%iln &it! #al#iner 

1' 12 14 15 1"

L() ratio

3 - *tations

+umber o, stations an$ L ( ) ratio

2 - *tations

1' 12 14 1"

L() ratio

3 - *tations

)esign o, rotary kilns

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3 - support kiln .ersa 2 - support kiln

(6support #iln &6support #iln

  Staticall" unde%ined

•  possiilit" o%

6 e7tre*e overload

  6 plastic de%or*ation

•  re8uire*ent %or

6 et7ra sa%et" *argin

  6 regular ad9ust*ent

  Staticall" de%ined

•  constant support loading

•  elastic de%or*ation onl"

•  no sensitivit" to *isalign*ent

long enough %or process:

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Kiln Inlet 

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0Lo&-$ust kiln inlet

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ir #oole$ segmente$ inlet t!roug!

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%iln inlet seal

Seal principle

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• Slot ad9ust*ent et'een support ring

  and slide ring

/ardanical %astening

%iln inlet

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Kiln Outlet 

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%iln outlet sealing

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Slide ring

Support ring

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=rinciple #iln outlet Kiln outlet 'ith dust chute

%iln outlet

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Outlet o% #iln Outlet cooling

%iln outlet

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%iln outlet

 ;ir pressure s"ste*

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Kiln Shell 

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)es#ription o, t!e kiln s!ell #al#ulation basi#s

The shell is a rotating dru* *ade %ro* rolled steel plates4 These shell sections

have the sa*e inside dia*eter ut di%%erent plate thic#ness4 ;ll sections are

'elded together4

The shell thic#ness is a result o% so*e calculations, the so6called Kiln Static4

>asic %or the #iln static are so*e *echanical rules and so*e li*iting %actors%or the shell *aterial, the so6called Design /riteria4

The design criteria %or a #iln shell is the >ending Stress4

Di%%erent #iln areas have di%%erent Loads4

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un#tions o, t!e kiln s!ell

•  /onve"s *aterial

•  Guides gas %ro* cooler to #iln

•  /reates a constant *oving *aterial ed

allo's heat e7change et'een gasand *aterial

•  Holds the ric# lining

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Splined Tires

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)es#ription an$ ,un#tion o, t!e kiln tire

The tire is a steel ring on the outside o% #iln shell4 It 'or#s as an

sti%%ener %or the #iln shell4 The #iln tires have to carr" the #iln 'eight4

Functions? •  Trans%er load %ro* shell to the rollers

•  Keeps the shell in a round shape

 •  Ma" trans%er tor8ue %ro* roller to tire

Design criteria? •  Tire ending stress

 •

  Ovalit" in 5

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Distriution o% %orces First splined tire in !+.-

*pline$ tires

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=rinciple splined tire Splined %i7ing

*pline$ tires

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  heFloating Shim

Plates Form the

Connection Between

the ire eeth and the

X-Shaped Retaining

Blocks

*pline$ tires

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Kiln shell ovalit"

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*pline$ tire

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Floating Tires

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Distriution o% %orces =rinciple o% %loating tires

 loating 8loose9 tires

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Steps %or radial pla" reduction

 loating tires

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 loating tires

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*pline$ kiln tire loating kiln tire

Comparison o, kiln s!ell o.alities

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 Supporting Roller Station

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)es#ription an$ ,un#tion o, a kiln roller 

 ; #iln roller is a steel 'heel 'hich is supported on each side4

@ach tire is supported " t'o rollers4

Functions?   •  Trans%er load %ro* tires to ase plate

•  Supports tires and #eeps the* in position

•  /an trans%er tor8ue %ro* rollers to tire

•  ;llo's rotation

Design criteria?   •  Hert0 =ressure

•  >earing =ressure

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Roller station

! >ase %ra*e

& >earing housing

asse*l"

( Roller and sha%tasse*l"

. Guide loc#

!& Oil level indicator  

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*el, aligning roller station ,or Polro kiln

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Kiln Drives

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irt! gear $ri.e system

! >ridge support

& >ridge plate

(, =late olts

. Girth gear  

3 Heat shield

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*el,-aligning pinion

=er*itted tilting? A !- **

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;le#tro-!y$rauli# $ri.e system

;l ! $ li $ i

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;le#tro-!y$rauli# $ri.e system

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;le#tro - me#!ani#al $ri.e

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Kiln Hood 

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%iln !oo$

! Lo'er part o% hood

& Bpper part o% hood( Suspension door  

Trolle" arrange*ent

. >urner seal

3 Inspection port

$ ;ccess door  

) Su plate

+ /ollar seg*ent

!- Seal to cooler  

!! Opening %or *easuring

soc#et

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Maintenance

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/hec# points o% #iln inlet seal?

•  Slot et'een support ring and slide ring

•  Thic#ness o% the 'ear ring

•  Cisual chec# o% sealing sur%aces

•  /hec# %or *aterial lea#age

•  =re6tensioning o% sealing roe

 

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 ;ir pressure net?

• ;ir pressure %or pneu*atic6c"linder 

• /hec# o% 'ater separator 

• /hec# o% luricator o% pressuri0ed air 

• /hec# %or lea#ages

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/hec# o% outlet seal?

1si*ilar to inlet seal2, 'ith additional points?

• Graphite lurication o% slide rings

• Function o% pendling hatch

• /learance o% dust chute

• Functioning operation o% e7pansion 9oints

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/hec# o% splined tire %astening?

• /hec# o% 'edge pre6tension

• Cisual chec# o% tire area

• /hec# o% 'elds

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/hec# o% %loating tire %astening?

• /ontrol o% relative *ove*ent

• =la" *easure*ents during stop ti*es

• /ontrol o% a7ial retainers

• Lurication o% slide sur%aces

• /hec# o% 'elds

 

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Da*ages at ase plates " de%%icient lurication

 

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