ISO 12743-2018 铜、铅、锌和镍精矿 成分和水分测定的取样程序

©ISO2018Copper,lead,zincandnickelconcentrates—SamplingproceduresfordeterminationofmetalandmoisturecontentConcentrésdecuivre,deplomb,dezincetdenickel—Procéduresd'échantillonnagepourladéterminationdelateneurenmétaletdel'humiditéINTERNATIONALSTANDARDISO12743Thirdedition2018-06ReferencenumberISO12743:2018(E)ISO12743:2018(E)ii©ISO2018–AllrightsreservedCOPYRIGHTPROTECTEDDOCUMENT©ISO2018Allrightsreserved.Unlessotherwisespecified,orrequiredinthecontextofitsimplementation,nopartofthispublicationmaybereproducedorutilizedotherwiseinanyformorbyanymeans,electronicormechanical,includingphotocopying,orpostingontheinternetoranintranet,withoutpriorwrittenpermission.PermissioncanberequestedfromeitherISOattheaddressbeloworISO’smemberbodyinthecountryoftherequester.ISOcopyrightofficeCP401•Ch.deBlandonnet8CH-1214Vernier,GenevaPhone:+41227490111Fax:+41227490947Email:copyright@iso.orgWebsite:www.iso.orgPublishedinSwitzerlandISO12743:2018(E)Foreword........................................................................................................................................................................................................................................vi1Scope.................................................................................................................................................................................................................................12Normativereferences......................................................................................................................................................................................13 Terms and definitions.....................................................................................................................................................................................14Samplingtheory....................................................................................................................................................................................................44.1General...........................................................................................................................................................................................................44.2Totalvariance...........................................................................................................................................................................................44.3Sampling-stagemethodofestimatingsamplingandtotalvariance.........................................................64.4Simplifiedmethodofestimatingsamplingandtotalvariance......................................................................94.5Interleavedsamplemethodofmeasuringtotalvariance................................................................................105Establishingasamplingscheme.......................................................................................................................................................126Massofincrement............................................................................................................................................................................................176.1General........................................................................................................................................................................................................176.2Massofincrementforfalling-streamsamplers.......................................................................................................176.3Massofincrementforcross-beltsamplers.................................................................................................................176.4Massofincrementformanualsamplingfromstationarylots....................................................................176.4.1Primaryincrements...................................................................................................................................................176.4.2Massofsecondaryandsubsequentincrements................................................................................186.5Massofincrementforstopped-beltreferencesampling.................................................................................187Methodsofsamplingfromconcentratestreams..............................................................................................................187.1General........................................................................................................................................................................................................187.2Mass-basissystematicsampling...........................................................................................................................................187.2.1General...................................................................................................................................................................................187.2.2Samplinginterval.........................................................................................................................................................197.2.3Samplecutter...................................................................................................................................................................197.2.4Takingofprimaryincrements...........................................................................................................................197.2.5Constitutionofsubsamplesandlotsamples........................................................................................197.2.6Typesofdivision...........................................................................................................................................................207.2.7Divisionofincrements.............................................................................................................................................207.2.8Divisionofsubsamples............................................................................................................................................207.2.9Divisionoflotsamples.............................................................................................................................................207.3Time-basissystematicsampling...........................................................................................................................................217.3.1General...................................................................................................................................................................................217.3.2Samplinginterval.........................................................................................................................................................217.3.3Samplecutter...................................................................................................................................................................217.3.4Takingofprimaryincrements...........................................................................................................................227.3.5Constitutionofsubsamplesandlotsamples........................................................................................227.3.6Typesofdivision...........................................................................................................................................................227.3.7Divisionofincrementsandsubsamples...................................................................................................227.3.8Divisionoflotsamples.............................................................................................................................................227.4Stratifiedrandomsampling......................................................................................................................................................227.4.1Fixedmassintervals..................................................................................................................................................227.4.2Fixedtimeintervals....................................................................................................................................................238Mechanicalsamplingofconcentratestreams.....................................................................................................................238.1General........................................................................................................................................................................................................238.2Designofthesamplingsystem...............................................................................................................................................238.2.1Safetyofoperators......................................................................................................................................................238.2.2Locationofsamplecutters...................................................................................................................................238.2.3Provisionforinterleavedsampling...............................................................................................................238.2.4Provisionforstratifiedrandomsampling...............................................................................................248.2.5Checkingprecisionandbias................................................................................................................................248.2.6Avoidingbias....................................................................................................................................................................24©ISO2018–AllrightsreservediiiContentsPageISO12743:2018(E)8.2.7Minimizingbias..............................................................................................................................................................248.2.8Configurationofthesamplingsystem........................................................................................................248.3Samplecutters......................................................................................................................................................................................248.3.1General...................................................................................................................................................................................248.3.2Designcriteria.................................................................................................................................................................258.3.3Cutterspeed......................................................................................................................................................................268.4Massofincrements...........................................................................................................................................................................268.5Numberofincrements..................................................................................................................................................................278.6Samplinginterval...............................................................................................................................................................................278.7Routinechecking................................................................................................................................................................................279Manualsamplingofconcentratestreams...............................................................................................................................289.1General........................................................................................................................................................................................................289.2Choosingthesamplinglocation............................................................................................................................................289.3Samplingimplements....................................................................................................................................................................289.4Massofincrements...........................................................................................................................................................................289.5Numberofincrements..................................................................................................................................................................289.6Samplinginterval...............................................................................................................................................................................289.7Samplingprocedures......................................................................................................................................................................299.7.1General...................................................................................................................................................................................299.7.2Fullstreamcutfromafallingstream..........................................................................................................299.7.3Partialstreamcutsfromafallingstream................................................................................................299.7.4Samplingfrommovingconveyorbelts......................................................................................................3010Stopped-beltreferencesampling.....................................................................................................................................................3011Samplingfromgrabs.....................................................................................................................................................................................3111.1General........................................................................................................................................................................................................3111.2Massofprimaryincrements....................................................................................................................................................3111.3Numberofprimaryincrements............................................................................................................................................3111.4Methodofsampling.........................................................................................................................................................................3111.5Constitutionofsubsamplesandlotsamples..............................................................................................................3112Samplingfromtrucks,railwaywagonsandsamplinghoppers........................................................................3212.1General........................................................................................................................................................................................................3212.2Massofprimaryincrements....................................................................................................................................................3212.3Numberofprimaryincrements............................................................................................................................................3212.4Methodofsampling.........................................................................................................................................................................3212.5Constitutionofsubsamplesandlotsamples..............................................................................................................3213Samplingofconcentrateinbagsordrums.............................................................................................................................3513.1General........................................................................................................................................................................................................3513.2Massofprimaryincrements....................................................................................................................................................3513.3Numberofprimaryincrements............................................................................................................................................3513.4Methodofsampling.........................................................................................................................................................................3613.4.1General...................................................................................................................................................................................3613.4.2Samplingduringfillingoremptying............................................................................................................3613.4.3Spearsampling...............................................................................................................................................................3613.5Constitutionofsubsamplesandlotsamples..............................................................................................................3614Samplingofstockpiles.................................................................................................................................................................................3715Methodsofcomminution,mixinganddivision.................................................................................................................3715.1General........................................................................................................................................................................................................3715.2Comminution.........................................................................................................................................................................................3715.2.1General...................................................................................................................................................................................3715.2.2Mills..........................................................................................................................................................................................3715.3Mixing..........................................................................................................................................................................................................3815.3.1General...................................................................................................................................................................................3815.3.2Methodsofmixing.......................................................................................................................................................3815.4Division.......................................................................................................................................................................................................3915.4.1Chemicalanalysissamples...................................................................................................................................