ASTM_C_911_-_06_2011.pdf

Designation:C91106(Reapproved 2011)Standard Specification forQuicklime,Hydrated Lime,and Limestone for SelectedChemical and Industrial Uses1This standard is issued under the fixed designation C911;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This specification covers lime and limestone productssuitable for the following chemical and industrial uses:Cooking ragsSulfite pulpSilica brickOther water treatment usesCalcium carbideGreaseCalcium silicate productsHypochlorite(bleach)The following uses are addressed in other ASTM standards:UseStandard(s)Neutralization of Waste Acid(TestMethods)C400Agricultural Liming MaterialsC602Soil StabilizationC977AsphaltC1097Flue Gas Desulfurization(Test Meth-ods)C1318Drinking Water SofteningC1529Waste and Wastewater NeutralizationC1529Wastewater Treatment Plant Residuals(Biosolids)StabilizationC1529 and D62491.2 The type designations in Table 1 signify the following:Limestone,high-calciumCLLimestone,dolomiticDLLimestone,magnesianMLQuicklime,high-calciumCQQuicklime,dolomiticDQQuicklime,magnesianMQHydrated lime,high-calciumCHHydrated lime,dolomiticDHHydrated lime,magnesianMH1.3 The buyer shall designate the use,as listed in Table 1,and may specify one or more of the type designations in 1.1.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applicabil-ity of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2C25 Test Methods for Chemical Analysis of Limestone,Quicklime,and Hydrated LimeC50 Practice for Sampling,Sample Preparation,Packaging,and Marking of Lime and Limestone ProductsC110 Test Methods for Physical Testing of Quicklime,Hydrated Lime,and LimestoneC400 Test Methods for Quicklime and Hydrated Lime forNeutralization of Waste AcidC602 Specification for Agricultural Liming MaterialsC977 Specification for Quicklime and Hydrated Lime forSoil StabilizationC1097 Specification for Hydrated Lime for Use in AsphaltCement or Bituminous PavementsC1318 Test Method for Determination of Total NeutralizingCapability and Dissolved Calcium and Magnesium Oxidein Lime for Flue Gas Desulfurization(FGD)C1529 Specification for Quicklime,Hydrated Lime,andLimestone for Environmental UsesD6249 Guide forAlkaline Stabilization of Wastewater Treat-ment Plant Residuals3.Chemical Composition3.1 The requirements for quicklime,hydrated lime,andlimestone for the selected end uses are as shown in Table 1,andare on the basis of the weight of sample taken at the place ofmanufacture,except as noted in footnote B after the require-ment.In this case,the requirement is on a moisture and carbondioxide-free basis.NOTE1Rags are cooked for the manufacture of paper in a digesterunder steam pressure with lime or with lime and soda ash.They are thenwashed to eliminate as much of the noncellulose material as possible.Astandard composition without rejection limits is specified for the reasonthat lime of either higher or lower total oxides,available lime,calciumoxide,or calcium hydroxide than the standard,may safely be used under1This specification is under the jurisdiction of ASTM Committee C07 on Limeand is the direct responsibility of Subcommittee C07.02 on Specifications andGuidelines.Current edition approved June 1,2011.Published July 2011.Originally approvedin 1979.Last previous edition approved in 2006 as C911 06.DOI:10.1520/C0911-06R11.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 suitable conditions for the purpose herein specified,depending primarilyupon economic considerations.In the present state of the art,it is believedthat the more serviceable type of specification for the product hereinspecified is that which defines a reasonable standard rather than one thatfixes actual rejection limits.It is generally recognized that,other thingsbeing equal,lime meeting this standard is preferable to lime that does not,and lime surpassing the standard should be considered of premium quality.NOTE2Lime is used in the“milk of lime”or“tank”system of sulfitepulp manufacture for making the cooking liquor.The milk of lime is heldin solution or suspension in a series of tanks equipped with suitableagitators.The sulfur dioxide(SO2)is forced or drawn through these tankssuccessively.In some cases,the tanks are built on