ASTM C911-2006 Standard Specification for Quicklime Hydrated Lime and Limestone for Selected Chemical and Industrial Uses《选定化学品和工业用生石灰、熟石灰和石灰石的标准规范》.pdf
《ASTM C911-2006 Standard Specification for Quicklime Hydrated Lime and Limestone for Selected Chemical and Industrial Uses《选定化学品和工业用生石灰、熟石灰和石灰石的标准规范》.pdf》由会员分享,可在线阅读,更多相关《ASTM C911-2006 Standard Specification for Quicklime Hydrated Lime and Limestone for Selected Chemical and Industrial Uses《选定化学品和工业用生石灰、熟石灰和石灰石的标准规范》.pdf(4页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: C 911 06Standard Specification forQuicklime, Hydrated Lime, and Limestone for SelectedChemical and Industrial Uses1This standard is issued under the fixed designation C 911; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revisi
2、on, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) 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 industr
3、ial uses:Cooking ragsSulfite pulpSilica brickOther water treatment usesCalcium carbideGreaseCalcium silicate productsHypochlorite (bleach)The following uses are addressed in other ASTM standards:Use Standard(s)Neutralization of Waste Acid (TestMethods)C 400Agricultural Liming Materials C 602Soil Sta
4、bilization C 977Asphalt C 1097Flue Gas Desulfurization (Test Meth-ods)C 1318Drinking Water Softening C 1529Waste and Wastewater Neutralization C 1529Wastewater Treatment Plant Residuals(Biosolids) StabilizationC 1529 and D 62491.2 The type designations in Table 1 signify the following:Limestone, hig
5、h-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
6、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 pri
7、or 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, Packag-ing, and Marking of Lime and Limestone ProductsC110 Test Methods for Physical Testing of Quicklime,Hydrated Lime,
8、 and LimestoneC 400 Test Methods for Quicklime and Hydrated Lime forNeutralization of Waste AcidC 602 Specification for Agricultural Liming MaterialsC 977 Specification for Quicklime and Hydrated Lime forSoil StabilizationC 1097 Specification for Hydrated Lime for Use in AsphaltCement or Bituminous
9、PavementsC 1318 Test Method for Determination of Total Neutraliz-ing Capability and Dissolved Calcium and MagnesiumOxide in Lime for Flue Gas Desulfurization (FGD)C 1529 Specification for Quicklime, Hydrated Lime, andLimestone for Environmental UsesD 6249 Guide for Alkaline Stabilization of Wastewat
10、erTreatment 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
11、this case, the requirement is on a moisture and carbondioxide-free basis.NOTE 1Rags 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
12、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 undersuitable conditions for the purpose herein specified, depending primarilyupon economic considerations. I
13、n the present state of the art, it is believed1This specification is under the jurisdiction of ASTM Committee C07 on Limeand is the direct responsibility of Subcommittee C07.03 on Industrial Uses.Current edition approved Nov. 15, 2006. Published November 2006. Originallyapproved in 1979. Last previo
14、us edition approved in 2005 as C 911 05.2For 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.1*A Summary of Change
15、s section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.that the more serviceable type of specification for the product hereinspecified is that which defines a reasonable standard rather than one
16、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.NOTE 2Lime is used in the “milk of lime” or “tank” system of sulfitepul
17、p 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 top of each other in theform of a to
18、wer. The contents of the first tank are drawn off when theliquor has reached a certain strength (3.5 to 6 % total SO2) and thecontents of the second and third tanks progress to the first and secondtanks respectively. The third tank is again charged with fresh milk of lime.There are other systems of
19、absorption that provide for continuous insteadof intermittent operation. The function of the lime is to furnish the base forthe formation of the bisulfites of calcium and magnesium.NOTE 3In the manufacture of silica brick, silica in the form ofmassive quartzite or quartz conglomerate is ground until
20、 the particles areless than14 in. (6 mm) in size. Lime in the form of either slaked orhydrated lime is then added in quantities varying from 1.5 to 3.0 %calcium oxide (CaO), with sufficient water to produce about 5 to 7 %moisture content, and the shapes are molded and dried. They are thenburned in d
21、owndraft or tunnel kilns until most of the quartzite has beenconverted into tridymite or cristobalite.NOTE 4For most water treatment applications, such as color removaland clarification of water for municipal and industrial supplies, high-calcium lime is preferred. However, for applications involvin
22、g silicaremoval from boiler feedwater, dolomitic lime is usually preferred.Drinking water softening and wastewater neutralization are addressed inSpecification C 1529.NOTE 5In manufacture of calcium hypochlorite bleach, lime hydratein water suspension is reacted with chlorine. Lime hydrate suitable
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