1、Designation: D6354 12 (Reapproved 2017)Standard Guide forSampling Plan and Core Sampling of Carbon CathodeBlocks Used in Aluminum Production1This standard is issued under the fixed designation D6354; the number immediately following the designation indicates the year oforiginal adoption or, in the c
2、ase 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. Scope1.1 This guide covers sampling of carbon cathode blocksused in the production of aluminum, an
3、d details procedures fortaking samples from single cathode blocks. It covers equip-ment and procedures for obtaining samples from cathodeblocks in a manner that does not destroy the cathode block orprevent its subsequent use as originally intended. However, theuser must determine the subsequent use
4、of the sampled cathodeblocks. Preferred locations for taking samples from single unitsof cathode blocks are covered in this guide.1.1.1 Information for sampling of shaped refractoryproducts, in general, is given in ISO 5022. This standard detailsthe statistical basis for sampling plans for acceptanc
5、e testing ofa consignment or lot. Cathode blocks used in the production ofaluminum have specific requirements of sampling, and whilethe statistical basis for sampling given in ISO 5022 applies,further or modified requirements may also apply.1.2 The values stated in SI units are to be regarded asstan
6、dard. No other units of measurement are included in thisstandard.1.3 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, health, and environmental practices and de
7、ter-mine the applicability of regulatory limitations prior to use.NOTE 1The following ASTM standards are noted as sources of usefulinformation: Test Methods C559, C611, C651, C747, C1025, C1039, andC1225.1.4 This international standard was developed in accor-dance with internationally recognized pri
8、nciples on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2C559 Test Method for Bulk Dens
9、ity by Physical Measure-ments of Manufactured Carbon and Graphite ArticlesC611 Test Method for Electrical Resistivity of ManufacturedCarbon and Graphite Articles at Room TemperatureC651 Test Method for Flexural Strength of ManufacturedCarbon and GraphiteArticles Using Four-Point Loading atRoom Tempe
10、ratureC747 Test Method for Moduli of Elasticity and FundamentalFrequencies of Carbon and Graphite Materials by SonicResonanceC1025 Test Method for Modulus of Rupture in Bending ofElectrode GraphiteC1039 Test Methods for Apparent Porosity, Apparent Spe-cific Gravity, and Bulk Density of Graphite Elec
11、trodesC1225 Specification for Fiber-Cement Roofing Shingles,Shakes, and Slates2.2 ISO Standards:3ISO 8007-1 Carbonaceous materials used in the productionof aluminum - Cathodic blocks - Sampling plan andsampling from single cathodic blocksISO 5022 Shaped refractory products - Sampling and accep-tance
12、 testing3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 cathode block, none manufactured unit used as anegative carbon electrode.3.1.2 sample, na portion of carbon obtained from acathode block.3.1.3 test specimen, na representative piece of a sample.4. Significance and Use4.1
13、Core sampling is an acceptable way of obtaining a testspecimen without destroying the usefulness of a cathode block.1This guide is under the jurisdiction of ASTM Committee D02 on PetroleumProducts, Liquid Fuels, and Lubricants and is the direct responsibility of Subcom-mittee D02.05 on Properties of
14、 Fuels, Petroleum Coke and Carbon Material.Current edition approved Oct. 1, 2017. Published November 2017. Originallyapproved in 1998. Last previous edition approved in 2012 as D635412. DOI:10.1520/D6354-12R17.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Custo
15、mer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.Copyright ASTM Internati
16、onal, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guid
17、es and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.14.1.1 Test specimens obtained by this guide can be used byproducers and users of cathode blocks for the purpose ofconducting the tests in Note 1 to obtain comparative physicalproperties.4.2 Sam
18、pling shall not weaken the cathode block or increasethe likelihood of premature failure. Extreme care shall beexercised when taking vertically drilled samples.5. Apparatus5.1 Core Drill Bit, similar to that shown in Fig. 1, driven bysuitable equipment. Use bits with cutting teeth coated withdiamond
19、or other extremely hard material.6. Procedure6.1 Sampling locations for cathode blocks that werevibrated, pressed, or extruded without a collector bar slot willdiffer from those cathode blocks that were formed withcollector bar slots.6.1.1 For cathode blocks without collector bar slots,samples shall
20、 be drilled from the part of the cathode block thatwill be machined out for the slot, as shown in Fig. 2. Care is tobe taken to ensure that cores drilled vertical to the slot do notpenetrate beyond the depth of the slot.6.1.2 For cathode blocks with collector bar slots, samplesshall be drilled from
21、the cathode block, as shown in Fig. 3.Ifthe user determines that cathode blocks with sample holesdrilled in them cannot be used in the electrolysis process, thenit will be necessary to obtain a number of cathode blocks withthe extra length, as shown in Fig. 3. The extra length will thenhave to be re
22、moved prior to cathode block use.6.2 Dimensions of a cored sample will depend upon the testthat is to be performed on the sample. The minimum dimension(usually the diameter) shall be at least three times the maxi-mum particle size of the dry aggregate used in the manufactureof the cathode block. Ref
23、erence should be made to thestandards relating to the tests to be performed to ensure that thesamples taken are to suitable dimensions.6.2.1 The specific dimensions of the test specimens to betested are normally given in the appropriate ASTM standard.Where a standard does not specify the dimensions
24、of the testspecimen, a diameter of 30 mm or 50 mm is recommended.The length of the test specimens should be at least one and ahalf times the diameter.6.3 Place the core drill bit firmly against the cathode block.Take care to maintain the bit level and true. Do not stop untilthe bit is embedded its f
25、ull length. Compressed air can be usedto cool the drill bit and remove dust while drilling. Do not usewater or other liquids to cool the drill bit.6.3.1 To remove the bit, pull and twist it by hand, orcarefully withdraw the drill bit while it is rotating. To removethe sample, insert a wedge between
26、it and the cathode blockuntil the core snaps.7. Report7.1 The sampling report shall include the following:7.1.1 Names of producer and customer,7.1.2 Manufacturers identification of the lot or batch ofcathode blocks being sampled,7.1.3 Reference to this guide,7.1.4 Date and place of sampling,7.1.5 If
27、 extra length cathode blocks were available forsampling, the proportion and number are to be noted,7.1.6 Sketches, similar to those in Fig. 2 and Fig. 3, showingthe location of the sampling locations and the direction ofsampling (horizontally or vertically),7.1.7 The dimensions of the samples,7.1.8
28、Identification of the people doing the sampling, and7.1.9 Complete details of sampling plan being followed.8. Keywords8.1 anthracite; carbon; cathodes; core; graphite; sample;sampling; test specimensFIG. 1 Typical Core Drill BitD6354 12 (2017)2ASTM International takes no position respecting the vali
29、dity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subj
30、ect to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquar
31、ters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standar
32、d is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or servi
33、ceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 2 Sampling from Single Units Produced Without SlotFIG. 3 Sampling from Single Units Produced with SlotD6354 12 (2017)3
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