HandbookofHammermillOperation(Ⅰ)HammermillGrindingSystemGrindingprocessIntroductionRawmaterialtypesGrindingequipmenttypesGrindingspecificationGrindingtechniquesSafetyandEnergyconsumptionsIntroductionThemostcommonequipmentusedinprocessingrawmaterialsareHammermills,Rollermill,AttritionmillandPulverizerThemajorityofrawmaterialusedinfeedmanufacturingaresubjectedtoparticlesizereduction.Themajorreasonsforparticlesizereductioninfeedmilloperationsare: -Exposegreatersurfaceareafordigestion. -Improveeasyhandlingofsomeingredients -Improvemixingcharacteristicsofingredients -Increasepelletingefficiencyandpelletfeedquality -Satisfycustomerpreference2.Rawmaterialtypes2.1Grainmaterials -Corn -Wheat -Milo -Soybean -Rice -Othergrainforms2.2Extractionplantbyproduct -Soybeanmeal -Rapeseedmeal -Cottonseedmeal -Sunflowermeal -Other2.3Carrier -Wheatbran -Ricebran -Ricehusk -Other2.4Otherproduct

-DBG. -DDGS. -CGLF. -CGEM. -CGEC.CrumblecornRawmaterialsamplesRawmaterialsamplegrinding3.Grindingequipmenttypes3.1Hammermill -Lowspeed1500rpm. -Highspeed2000-3000rpm. -Horizontaltypes -Verticaltypes3.2Rollermill -Onepairrollermill -Twopairrollermill -Threepairrollermill3.3Crusherorcrumble -Cracker -Crumble -Flakingmill -Beater -Other3.4Pulverizer -Horizontalpulverizers -Verticalpulverizer -OtherVerticalHammermillCornCrackingbyPelletCrumblesFinegrindingconceptPulverizerRollermill4.GrindingspecificationFeedGrindingscreenmm.%Passedscreenmm.%Fines/passedmm.Min.Max.2.01.00.70.54.0-0.51.0-0.5Starterbroilerfeed22.5>85

Broilerfeed33.5<30Starterswine1.52>95>85Growerswine22.5>80(85)Layermashfeed46<20>80<20RawmaterialDetail%passed1mm.screenHammermillscreensizemm.Brokenrice>802.0x2.0Corn>803.5x3.5Paddyrice>802.5x2.5Sorghum>803.0x3.0Soybeanmeal>753.0x3.0Sunflowermeal>803.0x3.0DBG.>803.0x3.0Peanutmeal>803.0x3.0Rapeseedmeal>803.0x3.0Popcorn>803.0x3.0Soybean>753.0x3.0RawmaterialgrindingspecificationguidelinesFeedManufacturingandProcessGuidelines

INGREDIENTS%MAXIMUMONSCREEN4.0mm.PASSEDSCREEN1.0mm5515135/3012615/12CORN,C(#1,#2)CORN,C(#1,#2)ROLLERMILLCORN,(#1,#2)LAYEREXPANDLAYMIX,CRUMBLES5.GrindingTechniques5.1Grindingscreenmodify-Screentypes-Screenholestypes-Screenmaintenanceandrepair5.2Grindinghammerbladeschangingmodify-Hammerbladeschangerequipment-Hammerbladeschangingtechniques-Hammerbladestypesandqualitycontrol 5.3Grindingbrakingmodify-Hammermillbrakingequipmentmodify5.4Grindingaspirationmodify-Hammermillaspirationcontrol-Hammermillaspirationmaintenanceandrepair-Hammermillaspirationmodifytousesuppercyclones5.5Hammermillpreventivemaintenanceprograms5.2Grindinghammerbladeschangingmodify

Hammerbladeschangingtechniques

“C”=Coarsegrindingposition,hammerblades farawayfromscreen(8-10mm.)for highcapacity,uniformgrindingwithminimum finesgeneration.“F”=Finegrindingposition,hammerbladesclose toscreenforfibrousgrindingormaximum arerequired.(3-5mm.)

Specialequipmentbladeschangermodify

HammermillbrakingmodifyforquicklystoppedtimesF1F4F3F2C1C2C3C4HammerdishdesignedF=Finesgrindposition

C=Coarsegrindposition3-5mm.8-10mm.Grinderscreen