Siktar

och

Matare

13:eMaj2006GrizzlyFeeder orFeeder+ScalperprimaryscreensecondaryscreenTertiaryscreensTherange…shapeHorizontalscreenallkindofscreeningapplication,washing&rinsingaswell...Therange...shapeConventionalinclinedscreensAllkindofscreening(primarysecondaryortertiary)withwashingsystemaswell.Therange...shapeMultislopescreensTertiaryscreeningwithhighfeedcapacityTherange…motionLinearmotion12341234

CircularmotionCGTherange…motionTherange…motion

CGEllipticalmotionTherange…MVNordbergPrimaryFeeders

BFeedersApplication:fixedormobileAggregates,recycling,mines,cement,...UsedbeforeJawcrushersorImpactorsSpecifications:Maxfeedsizeis350to1500mmCapacity500à1500t/h(@1.6t/m3)Linearmotioninclinedat45°Stroke7to12mmEquipment:2or3scalpingstepsCassetteorindividualgrizzlybarssectionsFingers(vibratingrods)Closedbottom

B10422VB10522VB13442V B13503V B13562VB16503V B16562VB20662V NordbergPrimaryFeeders

BFeedersNordbergPrimaryFeeders

BFeedersFeederwidthmustbeminimum1.5timesbiggerthanthebiggestsizeofmaterial….W=1.5xDNordbergPrimaryFeeders

BFeedersFeederwidthdimensionshouldfittotheopeningofthecrusher:B10-422V =>C100&NP1210B10-522V =>C100&NP1210B13-442V =>C110&NP1213&NP1313B13-503V =>C110&NP1213&NP1313B13-562V =>C125&NP1315SR&NP1415B16-503V =>C160&NP1520SRB16-562V =>C160&NP1620B20-662V =>C200Oncetheminimumrequiredwidthfortheapplicationisdeterminedthefeedercanbesizedforcapacity.

NordbergPrimaryFeeders

BFeedersThosevaluesareindicativeandcanvarymoreorlessdependingonrealapplicationdata(gradationcurve,bulkdensity,moisture,…)NordbergPrimaryFeeders

VFFeedersHuckboltdesign,Rubbersprings,MVmechanismAdjustablestroke…VFseriesFeederNordbergScalperThosevaluesareindicativeandcanvarymoreorlessdependingonrealapplicationdata(gradationcurve,bulkdensity,moisture,…)NordbergprimaryscreensNordbergprimaryscreensThosevaluesareindicativeandcanvarymoreorlessdependingonrealapplicationdata(gradationcurve,bulkdensity,moisture,…)NordbergsecondaryscreensNordbergsecondaryscreensThosevaluesareindicativeandcanvarymoreorlessdependingonrealapplicationdata(gradationcurve,bulkdensity,moisture,…)NordbergtertiaryscreensNordbergtertiaryscreensNordbergtertiaryscreensNordbergtertiaryscreensThosevaluesareindicativeandcanvarymoreorlessdependingonrealapplicationdata(gradationcurve,bulkdensity,moisture,…)Nordberghorizontalscreens

ApplicationThosevaluesareindicativeandcanvarymoreorlessdependingonrealapplicationdata(gradationcurve,bulkdensity,moisture,…)Nordberghorizontalscreens

FSNordberghorizontalscreens

E2Nordberghorizontalscreens

LSPractice...Herearesomeapplications,selectthecorrectvibratingmachine…andsizeit...Example1...Rawfeedof0-700mmat400t/hinfrontofaC110,wewanttotakeoutthe0-100mm…Kindofmachine…Size…BFEEDERB13-442VFeed:passingat150mm=540t/hpassingat75mm=480t/hpassingat50mm=408t/hpassingat25mm=288t/hpassingat20mm=210t/hpassingat10mm=120t/hExample2...Feed0-400mmat650t/htoreach3technicalcutsizes150mm50mm&20mm.D=1.6t/m3&2%moistureKindofmachine…PrimaryscreenSize…CVB2060IIIPFeed:passingat6mm=310t/hpassingat4mm=240t/hpassingat3mm=200t/hpassingat2mm=155t/hExample3...Wewanttoreach0-4mm&4-6mmfinalproduction.Feedisa0-20mmlimestoneat700t/h,D=1.6t/m3,dryproduct.Kindofmachine…TertiaryscreenSize…TS402Feed:passingat35mm=195t/hpassingat17.5mm=120t/hpassingat20mm=135t/hpassingat10mm=60t/hExample4...Wewanttoseparatearoundmaterialfeedat350t/hof0-100mminto3fractions:0-20mm20-35mm&35-100mm.Kindofmachine...SecondaryScreenSize…CVB1540IITopicsI TheRangeII VibratingProductOfferingEuropeIII VibratingProductManagement

IV Figures2004…VScreenCalculationPracticeBasicscreencalculationSoftwareScreencalculationThosetablesherebeforearetheoreticalandonlyintegrate2parameters:maxfeedsizeandmaxcapacity.Otherparametersarenecessaryinordertosizecorrectlyascreen:Kindofmaterial(crushed,round,limestone,granite,…)Acompletefeedcurvebulkdensitymoisturecontentprocessmediatype(metallic,PU,sidetensionormodularpanels…)neededcutsizes,finalproductsScreencalculationTherearemanydifferentkindofscreencalculationformulas.Alltakeintoaccountmoreorlessparameters,andsomeofthoseparametersaredifficulttoprecise.That

’swhyweneedtoaccompanythetheoreticalresultswithpracticalresults,tocomparewithsimilarcases.ScreencalculationThebasicformulais:

AS= TxVxHxExRxFpS=Screeningsurface(m2)A=passing(t/h)T=basiccapacity(t/h/m2)V=OversizecoefficientH=HalfsizecoefficientE=efficiencycoefficientR=washingcoefficientFp=deckpositionThisformulahastobeappliedtoeachofthedeck.Generallythedeckwhichissizingidusuallythebottomone.Screencalculation

CoefficientT_basiccapacityScreencalculation

CoefficientV_OversizeScreencalculation

CoefficientH_HalfsizemeshpassingScreencalculation

CoefficientE_EfficiencyScreencalculation

CoefficientR_WashingScreencalculation

CoefficientFp_DeckpositionScreencalculation

Example2deckscreen,receiving110tphofroundmaterial.Washingscreening,tocutat3mmet8mm.Feedcurve:1,5mm 15% 16.5t3 35 38.54 45 49.58 65 71.525 100 110Screencalculation

ExampleBottomdeck:cutsizeat3mm=> T…basiccapacity=6,9t/h/m2 V…oversizecoefficient=0.92 H…halfsizecoefficient=0.73 E…efficiencycoefficient=1 R…washingcoefficient=1.7 Fp…deckcoefficient=0.9So...: 38.5 S= =5,4m2 6.9x0.92x0.73x1x1.7x0.9Screencalculation

ExampleTopdeck:Cutsizeat8mm=> T…basiccapacity=13t/h/m2 V…oversizecoefficient=0.96 H…halfsizecoefficient=1.1 E…efficiencycoefficient=1 R…washingcoefficient=2.1 Fp…deckcoefficient=1So...: 71.5 S= =2,4m2 13x0.96x1.1x1x2.1x1Screencalculation

ExampleSafetyCoefficient:RealSurfaceSc= TheoreticalSurfaceThissafetycoefficientmustbesuperiorat1,2forsizingscreens(tertiary).Itcanbereduceto1,1fortherepartitionscreens(primarysecondary)andforEllipticalmotionscreens.Inourexample,ifwechooseaninclinedconventionalscreencircularmotion,CVBtype,wecanchooseaCV