gb 14263-2010_en

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1、enqiICS77.120.01D42NATIONALSTANDARDOFTHEPEOPLE'SREPUBLICOFCHINA中华人民共和国国家标准GB/T14263-2010ReplaceGB/T14263-1993MethodsforSamplingandSamplePreparationofFlotationCopperConcentratesinBulk散装浮选铜精矿取样、制样方法Issuedon:December23,2010Implementedon:September01,2011JointlyIssuedbytheGeneralAdministrationofQualit

2、ySupervision,InspectionandQuarantineofthePeople'sRepublicofChinaandtheStandardizationAdministrationofthePeople'sRepublicofChinaContentsForewordI1Scope12NormativeReferences13TermsandDefinitions14Requirements15Sampling26SamplePreparation77MoistureDetermination12ForewordThisstandardisdraftedincompli

3、ancewiththerulesinGB/T1.1-2009.ThisstandardreplacesGB/T14263-1993"MethodsforSamplingandSamplePreparationofFlotationCopperConcentratesinBulk".ComparedwithGB/T14263-1993,thisstandardhasthefollowingmainchanges:——Thecontentoftotalprecisionofsampling,samplepreparationanddeterminationinthestandardismod

4、ifiedgreatly;——Thebasiclotismodified;——Thesystematicsamplingmethodisdividedintomasssystematicsamplingmethodandtimesystematicsamplingmethod,andrespectiveprovisionsaremadeforthem;——Thegroundsamplingmethodisaddedinthetrucksamplingmethod;——Thebaggedsamplingmethodisadded;——Thesamplepreparationflowchar

5、tismodified,theinterfusionmethodinsamplepreparationisadded,andthesampleflowchartwhichisalsousedforsamplepreparationintheformerstandardisdeleted;——"Sieving"insamplepreparationismodifiedto"freepassastandardsieve";——Theprecisionoftheelectronicbalanceusedinmoisturedeterminationismodifiedtowithasensib

6、ilitynotlessthan0.01g;——Therequirementsforthespecificationofdryingtrayformoisturedeterminationarespecified;——Rulesofroundingofffornumericalvaluesformoisturedeterminationareadded.ThisstandardisproposedbyChinaNonferrousMetalsIndustryAssociation.ThisstandardisunderthejurisdictionoftheNationalTechnic

7、alCommitteeonNonferrousMetalsofStandardizationAdministrationofChina(SAC/TC243).Draftingorganizationsofthisstandard:DayeNonferrousMetalsCo.,Ltd.,ChinaInstituteofWeightsandMeasuresQualityofNonferrousMetalIndustry.Partici