1、Designation: E 1833 07Standard Practice forSampling of Blister Copper in Cast Form for Determinationof Chemical Composition1This standard is issued under the fixed designation E 1833; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision,
2、 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. Scope1.1 This practice describes a procedure for the sampling andsample preparation of cast blister copper for th
3、e 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 thesafety concerns, if any, associated with its use. It is theresponsibility of the user of thi
4、s 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:2E 88 Practice for Sampling Nonferrous Metals and Alloysin Cast Form for Determination of Chemical CompositionE 135 Termi
5、nology Relating to Analytical Chemistry forMetals, Ores, and Related Materials3. Terminology3.1 For definitions of terms used in this practice, refer toTerminology E 135.4. Summary of Practice4.1 Each selected copper piece is drilled by means of acommercial drill press using a34-in. carbide-tipped,
6、or toolsteel drill. The speed of sampling shall be so regulated thatexcessive heating, and consequent oxidation, is avoided.Carbide-tipped tools are recommended. Drill cuttings arecollected with a commercial vacuum cleaner and ground in acutter mill. Sample size reduction is accomplished with the us
7、eof 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 specifications. It is assumed that all who usethese methods shall be trained samplers capable of performingcommon s
8、ampling 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 analysis. The analytical results will be oflittle value unless the sample represents the average composi-tion of t
9、he 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 or Hance Grinder.6.6 Drill Bit, approximately34-in. diameter and a lengthsufficient to penetrate the blister copp
10、er 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, approximately 10 3 10in.6.11 Paper, Kraft.6.12 Pulp Sample Sacks.6.13 Riffle, Jones Type, or other of similar design.6.14
11、 Rotap Machine, or similar sieve shaking device.6.15 Template, drilling sequence, Fig. 1, Note 1.6.16 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:1This practice is under the jur
12、isdiction of ASTM Committee E01 on AnalyticalChemistry for Metals, Ores and Related Materials and is the direct responsibility ofSubcommittee E01.05 on Cu, Pb, Zn, Cd, Sn, Be, their Alloys and Related Metals.Current edition approved Feb. 1, 2007. Published February 2007. Originallyapproved in 1996.
13、Last previous edition approved in 2001as E 1833 96 (2001).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.1Co
14、pyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.7.1.1 Different parts of a blister copper form may vary incomposition.Asample, therefore, must be taken with care to berepresentative of that form. To obtain a sample representativeof a lo
15、t of the product, a number of test pieces should besampled individually. The sample taken should be representa-tive and large enough to suffice for all of the requireddeterminations and reserve material for the settlement ofdisputes.7.1.2 Fit the drilling sequence template to one edge of theblister
16、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 corner 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 bl
17、ister 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 high-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
18、 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 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
19、 a commercial vacuum cleaner and deposited inthe vacuum receiving chamber. Place the 10 3 10 in squarepan under the blister copper form, in line 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 cu
20、ttings, present in thepan, into the vacuum receiving chamber. If a vacuum is notavailable, brush drill cuttings into a receiving pan with a stiff3-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 blist
21、er 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 quadrant 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 vacuumreceivin
22、g chamber to a plastic sack-lined bucket. Record allpertinent information on the sample information card and placethe card in the bucket. Place the 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 r
23、educe large conglomeratesof sample. Place the gross sample into the V-blender and blendfor 15 min. Riffle the sample to split the gross sample into twoequal representative fractions, A and B. Place the A incrementinto storage and label, “bulk reserve” sample. Continue to rifflethe B fraction until a
24、pproximately 4000 g of sample have beenobtained. Place all surplus increment splits from the B fractioninto the A increment bulk storage container.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 hol
25、ding pan into a sieveshaker for 15 min. Separate the +20 mesh material, which ispresent upon the 20-mesh screen, from the 20 mesh holdingpan. Regrind 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
26、 material obtained in 7.2.2in a flat area approximately14 in. on the brown Kraft paper.7.2.4 Comb the spread 20 mesh blister copper materialwith the hand held magnet. Hold the magnet approximately34in. above the flattened material. The magnet will remove asampling bias due to iron metal shavings fro
27、m the cutter mill.NOTE 1The magnet also may remove other magnetic material fromthe drill cuttings.Adjust the height of the magnet until only 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 m
28、esh holding pan into the sieve shaker. Shakefor 15 min. Remove the +60 mesh blister copper material.NOTE 2Screen size may be changed by contractual 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
29、division, split separately the +60 mesh materialand the 60 mesh material with a riffle until the contractuallyagreed laboratory samples can be obtained. The samplesshould be divided into three equal portions, placed in anidentified container and sealed. One portion each shall bereserved for the manu
30、facturer, purchaser, and umpire.NOTE 3Sample division may be changed by contractual agreement.7.3 Sample StorageMaterial to be stored over a longperiod, which oxidizes readily alters in composition undervarying atmospheric conditions should be kept under a protec-tive gas, such as nitrogen, in an ai
31、rtight container of suitablesize and composition. This same storage should be used whencontamination by paper or cardboard fibers is a concern.7.4 ResamplingIn case of dissatisfaction with the sampleprepared from the product, either party may require that theconsignment of blister copper be reprepar
32、ed.8. Keywords8.1 blister copper; samplingNOTE 1Template should have external measurements that wouldexactly fit14 of the dimensions of the cast blister bars.FIG. 1 Drilling Sequence TemplateE1833072ASTM International takes no position respecting the validity of any patent rights asserted in connect
33、ion 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 subject to revision at any time by the responsibl
34、e 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 Headquarters. Your comments will receive careful cons
35、ideration 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 standard is copyrighted by ASTM International, 100 B
36、arr 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 serviceastm.org (e-mail); or through the ASTM website(www.astm.org).E1833073
