1、Designation: E1833 07a (Reapproved 2013)1Standard Practice forSampling of Blister Copper in Cast Form for Determinationof Chemical Composition1This standard is issued under the fixed designation E1833; the number immediately following the designation indicates the year oforiginal adoption or, in the
2、 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.1NOTESections 6.10 and 7.1.5 were editorially corrected in October 2013.1. Scope1.1 This practice d
3、escribes a procedure for the sampling andsample preparation of cast blister copper for the determinationof chemical composition.1.2 This practice is intended to cover the general principlesof sampling applicable to cast blister copper forms.1.3 This standard does not purport to address all of thesaf
4、ety 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 applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2E135 Terminology Relating to An
5、alytical Chemistry forMetals, Ores, and Related Materials3. Terminology3.1 For definitions of terms used in this practice, refer toTerminology E135.3.2 Definitions of Terms Specific to This Standard:3.2.1 lot, nas used in this practice, the unit to be sampled,in pounds or pieces.4. Summary of Practi
6、ce4.1 Each selected copper piece is drilled by means of acommercial drill press using a34-in. carbide-tipped, or toolsteel drill bit. The speed of sampling shall be so regulated thatexcessive heating, and consequent oxidation, is avoided.Carbide-tipped tools are recommended. Drill cuttings arecollec
7、ted with a commercial vacuum cleaner and ground in acutter mill. Sample size reduction is accomplished with the useof a riffle and Tyler screens.5. Significance and Use5.1 This practice for sampling of cast blister copper isintended primarily to test such materials for compliance withcompositional s
8、pecifications. It is assumed that all who usethese methods shall be trained samplers capable of performingcommon sampling procedures skillfully and safely.5.2 The selection of correct test pieces and the preparationof a representative sample from such test pieces are necessaryprerequisites to every
9、analysis. The analytical results will be oflittle value unless the sample represents the average composi-tion of the material from which it was prepared.6. Apparatus6.1 Bucket, plastic sack-lined.6.2 Cards, sampling information.6.3 Center Punch-Spring Steel.6.4 Chalk, blackboard type.6.5 Cutter Mill
10、 or Hance Grinder.6.6 Drill Bit, approximately34-in. diameter and a lengthsufficient to penetrate the blister copper form completely.6.7 Drill Press, commercial type, 610 rpm.6.8 Electromagnet, hand-held or other permanent magnet.6.9 Hammer, blacksmith type.6.10 Pan, square metal or plastic, approxi
11、mately 10 in. 10in.6.11 Paper, Kraft.6.12 Pulp Sample Sacks.6.13 Riffle, Jones Type, or other of similar design.6.14 Rotap Machine, or similar sieve shaking device.6.15 Template, drilling sequence, Fig. 1, Note 1.1This practice is under the jurisdiction of ASTM Committee E01 on AnalyticalChemistry f
12、or Metals, Ores, and Related Materials and is the direct responsibility ofSubcommittee E01.05 on Cu, Pb, Zn, Cd, Sn, Be, Precious Metals, theirAlloys, andRelated Metals.Current edition approved Oct. 1, 2013. Published October 2013. Originallyapproved in 1996. Last previous edition approved in 2007 a
13、s E1833 07a. DOI:10.1520/E1833-07AR13E01.2For 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.Copyright ASTM Inter
14、national, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States16.16 Tyler Screen, 20 mesh, 12 in.6.17 Tyler Screen, 60 mesh, 12 in.6.18 V-blender, or similar style mixer.6.19 Vacuum Cleaner, commercial quality.7. Procedure7.1 Sampling:7.1.1 Different parts of a blister
15、 copper form may vary incomposition.Asample, therefore, must be taken with care to berepresentative of that form. To obtain a sample representativeof a lot of the product, a number of test pieces should besampled individually. The sample taken should be representa-tive and large enough to suffice fo
16、r all of the requireddeterminations and reserve material for the settlement ofdisputes.7.1.2 Fit the drilling sequence template to one edge of theblister copper form. The edges of the template should be evenwith the edges of the blister copper form. One corner of thetemplate should be near one corne
17、r of the form and theopposite corner should be near the center of the bar. Thetemplate should cover approximately one-quarter of the surfacearea of the blister copper form.7.1.3 Chalk the number one hole, then remove the template.Use the center punch and mark the chalked area for drilling.With a hig
18、h-pressure air hose, blow off the excess chalk anddust particles on the copper form. Care shall be exercised thatforeign material is not included with the drilling.7.1.4 Begin drilling the blister copper form in the markedarea. Be careful to keep the drill bit properly aligned. Thespeed of sampling
19、shall be so regulated that excessive heatingand consequent oxidation is avoided.7.1.5 Blister copper drill cuttings, as they are produced, arepicked up by a commercial vacuum cleaner and deposited inthe vacuum receiving chamber. Place the 10 in 10 in squarepan under the blister copper form, in line
20、with the drill bit.When the drill bit has completely penetrated the blister form,drill cuttings fall into this pan.7.1.6 Vacuum the blister copper drill cuttings, present in thepan, into the vacuum receiving chamber. If a vacuum is notavailable, brush drill cuttings into a receiving pan with a stiff
21、3-in. paint brush.7.1.7 Repeat 7.1.2 7.1.6 for each template location until alleleven holes have been drilled in the same quadrant of elevendifferent blister copper forms.7.1.8 Move the template to the next quadrant location on theblister copper form and repeat steps 7.1.2 7.1.7 for eachremaining qu
22、adrant on the copper forms.7.1.9 Repeat 7.1.2 7.1.8 for all copper forms in the grosssample of the lot. Transfer the drill cuttings from the vacuumreceiving chamber to a plastic sack-lined bucket. Record allpertinent information on the sample information card and placethe card in the bucket. Place t
23、he lid on the bucket and seal it.7.2 Sample Preparation:7.2.1 Adjust the cutter mill to coarse grind. Slowly pour thegross sample into the cutter mill to reduce large conglomeratesof sample. Place the gross sample into the V-blender and blendfor 15 min. Riffle the sample to split the gross sample in
24、to twoequal representative fractions, A and B. Place the A incrementinto storage and label, “bulk reserve” sample. Continue to rifflethe B fraction until approximately 4000 g of sample have beenobtained. Place all surplus increment splits from the B fractioninto the A increment bulk storage containe
25、r.7.2.2 Using the 4000 g B increment sample obtained in7.2.1, place this material into the 20 mesh 12-in. Tyler screen.Place the screen and its 20 mesh holding pan into a sieveshaker for 15 min. Separate the +20 mesh material, which ispresent upon the 20-mesh screen, from the 20 mesh holdingpan. Reg
26、rind the +20-mesh material in the cutter mill until100 % of the +20-mesh material will pass through the 20-meshTyler screen.7.2.3 Spread all of the 20-mesh material obtained in 7.2.2in a flat area approximately14 in. deep on the brown Kraftpaper.7.2.4 Comb the spread 20 mesh blister copper materialw
27、ith the hand held magnet. Hold the magnet approximately34in. above the flattened material. The magnet will remove asampling bias due to iron metal shavings from the cutter mill.NOTE 1The magnet also may remove other magnetic material fromthe drill cuttings.Adjust the height of the magnet until only
28、the iron filingsare removed.7.2.5 Place the combed 20 mesh blister copper into the 60mesh Tyler screen. Place the 60 mesh Tyler screen, blistercopper, and 60 mesh holding pan into the sieve shaker. Shakefor 15 min. Remove the +60 mesh blister copper material.NOTE 2Screen size may be changed by contr
29、actual agreement.7.2.6 Weigh in grams, both the +60 mesh and 60 meshblister copper material. Record the weights obtained upon thereceiving pulp sacks.7.2.7 By division, split separately the +60 mesh materialand the 60 mesh material with a riffle until the contractuallyagreed laboratory samples can b
30、e obtained. The samplesshould be divided into three equal portions, placed in anidentified container and sealed. One portion each shall bereserved for the manufacturer, purchaser, and umpire.NOTE 3Sample division may be changed by contractual agreement.7.3 Sample StorageMaterial to be stored over a
31、longperiod, which oxidizes readily, or which alters in compositionunder varying atmospheric conditions should be kept under aprotective gas, such as nitrogen, in an airtight container ofNOTE 1Template should have external measurements that wouldexactly fit14 of the dimensions of the cast blister bar
32、s.FIG. 1 Drilling Sequence TemplateE1833 07a (2013)12suitable size and composition. This same storage should beused when contamination by paper or cardboard fibers is aconcern.7.4 ResamplingIn case of dissatisfaction with the sampleprepared from the product, either party may require that theconsignm
33、ent of blister copper be reprepared.8. Keywords8.1 blister copper; samplingASTM International takes no position respecting the validity 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
34、 of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject 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
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36、received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copie
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