Hammer mill,ball mill,and fluid energy mill.pdf

A sort note on mills
Easy and simple way to write

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1. BALLMILL,HAMMER MILLAND
FLUIDENERGYMILL
PRESENYED BY:-ATISHKUMAR
CLASS:-B.PHARM2
NDYEAR(3
RDSEM)
SUBJECT:-PHARMACEUTICALENGINEERING
PRESENTEDTO:-VIPINKUMARGUPTA
( ASSISTANTPROFESSOR)
KRISHAKCOLLEGEOFPHARMACY,RAJGAR,
MIRZAPUR(UP)

2. BALLMILL
▶Ballmillisthemillused toreduceparticlesize
throughimpact&attrition.
Principle
▶Ballmillisbasedontheprincipleofimpact&
attrition.

3. CONSTRUCTIONS
▶Ballmillismadeupofstainlesssteelahollow
cylinder.
▶Itcontaindifferencesizeofballranging12mm–
125mm.
▶The hollow cylinder is mountain on a metallic
frameinsuch wayitcanberotateon
longitudinalaxis.
▶Theballsizeisdependuponamountoffeeds.

4. Diagramofballmill

5. Workingofballmill
▶Totakegroundedmaterialorfeedsoflarge
molecules, itmaybedried.
▶Thenweightitnotcontainmoisture.
▶Thematerialisinsolidform.
▶Theninsertedintothehollowcylinderrequired
amountsizeofball intothehollowcylinder
(only60%feed).
▶Thenclosethelidthenallowtorotatehollow
cylinderontheiraxis.

6. WORKINGOFBALLMILL
▶Theoptimumspeedisveryimportantforsize
reductionatlowspeedtheballrollovereach
other&irritationwillbenotdone.
▶Insuch caseweaddsurfactantorsurface
activeagenttopreventaccumulation.
▶Atcorrectspeedasresulttheballpickupby
millwall&carriednearlytothetalk.

7. WORKINGOFBALLMILL
▶Where the break contact with the wall &fall the
bottom.
USESOFBALLMILL
▶Useforsizereductionforsolidmaterial.
▶Theparticlesizereducesinballmill100–5mm.
▶Productionofophthalmic&parenteral
preparationorproduct.

8. ADVANTAGEOFBALLMILL
▶Itcanbeproducesveryfinepowder.
▶Ituseforbatchoperation.
▶Toxicsubstancecanbereduces.
▶Theballmillisavailableinvarioussize&shape
ofballsuch asroundballbandedball,cube
&cylindrical.
▶Themillisclosesystemthat’swhysterilization
canbeachieved.

9. DISADVANTAGE
▶Shortcomings of ball mills.
▶Unhandiness and large weight.
▶Grinding high specific energy consumption
energy is mainly consumed on the wear of balls
and wall armor, friction, heating of material,
etc.
▶Loud noise during working.

10. ▶Itisbasedontheprincipleof
impactand attrition.
FLUIDENERGYMILL
PRINCIPLE

11. CONSTRUCTION
▶Itisconsistormadeupofloopofpipe.
▶Thereheightis2meter&diameterof20–
200mmdependonsizeoffluidenergymill.
▶Theyconsistahopperforinletofairbyflowthe
airorinertgasandoneoutletforreceivethe
reduces particles size and also consist a sieve
forsizeseparation.

12. WORKING
▶Firstlydrugorsolidparticleswhicharetobereduces
introduce into the hopper through hopper itgo into the
loopofpipethenhopperisclosed.
▶Thenairintroducethroughairinletwhichhighpressureis
developed in loop of pipe due to high degree of
turbulenceimpactandattritionforceoccursbetween the
particlesizestartedtothereducesintothesmallsize.
▶Add desired particles spate out through sieve and then
collectedintothereceiver.

13. USES
▶Themillisusedtoreducesforthoseparticles
whichareheat sensitive.
▶Inthefluidenergymillnohavecontamination
chance.
▶Itisusedforreducingvitamins,sulphonamide
andantibiotics.
▶Itwillreducestheparticlesize1–20mm.

14. ADVANTAGE
▶Itwillused tograndingveryfinepowder.
▶The particle can be control due to the use of
sieve.
▶Therearenocontaminationoccur.
▶Itisuseforheatsensitive.

15. DISADVANTAGE
▶Highenergyisconsumption.
▶Generationofamorphouscontactduetohigh
energyimpact.
▶Theequipment isexpensive.
▶Itisnotsuitableforstickyorwaxymaterial(soft)

16. HAMMERMILL
Principle
▶Inthehammermilltheprincipleisinvolve
impactbyheavymetalsrotatingathighspeed.

17. CONSTRUCTION
▶Theconstructionofhammermillwhichconsist
ofhopper, millingchamber,discharger,sieve
andhammerorbarrangingfrom150-
250mm(diameterofhammerbar).

18. DIAGRAMOFHAMMERMILL

19. WORKINGOFHAMMERMILL
▶Firstlybulkorfeedmaterialstoreinthehopperthen
throughhopper.
▶Itwillstarttodownduetogravity.
▶Startthemachine andhammermillstarttoheatthe
particlesizeandbytheimpactparticlestartto
decreasingandafterreducingparticlestoreinthe
receiverthroughsieveandthoseparticleswhich
dosenotreduceagainfillintothehopper.

20. USESOFHAMMERMILL
▶Itusetoreducedhardsolidmaterial.
ADVANTAGEOFHAMMERMILL
▶Itisusedforbigger particlesizeusedforhardparticles
▶Easyandfastuse.
▶Theparticlesizeofthematerialtobereducescanbe
easilycontrolbychangingthespeedofrotatorand
hammerandshapeandsizeofsieve.

21. DISADVANTAGE
▶Maybeproducesheatorfire.
▶Itproducesmorenoise.
▶Itisrequiredmoreenergy.
▶Maybeproducesdust.
USES
▶Itisusedtoreducedhardsolidmaterial.