1、BRITISH STANDARD BS 6043-3.1.1: 1999 ISO 8007-1: 1999 Methods of sampling and test for carbonaceous materials used in aluminium manufacture Part 3: Electrodes Section 3.1: Sampling Subsection 3.1.1: Sampling of cathodes ICS 71.100.10BS6043-3.1.1:1999 This British Standard, having been prepared under
2、 the directionof the Sector Committeefor Materials and Chemicals, waspublished underthe authorityof the Standards Committee and comesinto effect on 15October1999 BSI 04-2000 ISBN 0 580 32816 3 National foreword This British Standard is the UK national implementation of ISO8007-1:1999. The UK partici
3、pation in its preparation was entrusted to Technical Committee C11/24, Raw materials for the aluminium industry, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for ch
4、ange, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or
5、European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the
6、necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, t
7、heISO title page, pages ii to iv, pages 1 to 3 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBS6043-3.1
8、.1:1999 BSI 04-2000 i Contents Page National foreword Inside front cover Foreword iii Text of ISO 8007-1 1ii blankBS6043-3.1.1:1999 ii BSI 04-2000 Contents Page Foreword iii Introduction 1 1 Scope 1 2 Normative references 1 3 Definitions 1 4 Apparatus 1 5 Taking test samples from individual cathodes
9、 1 5.1 Procedure 1 5.2 Cathode blocks produced without a collector-bar slot 1 5.3 Cathode blocks produced with a collector-bar slot 1 5.4 Dimensions of test samples 3 6 Sampling report 3 Figure 1 Examples of sampling-point locations for cathode blocks without a slot 2 Figure 2 Examples of sampling-p
10、oint locations for cathode blocks with a slot 2BS6043-3.1.1:1999 BSI 04-2000 iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
11、 ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborate
12、s closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part3. Draft International Standards adopted by the technical committees are circul
13、ated to the member bodies for voting. Publication as an International Standard requires approval by at least75% of the member bodies casting a vote. International Standard ISO8007-1 was prepared by Technical Committee, ISO/TC47, Chemistry, Subcommittee SC7, Aluminium oxide, cryolite, aluminium fluor
14、ide, sodium fluoride, carbonaceous products for the aluminium industry. ISO 8007 consists of the following parts, under the general title, Carbonaceous materials used in the production of aluminium Sampling plans and sampling from individual units: Part 1: Cathode blocks; Part 2: Prebaked anodes. Pa
15、rt 3, which is in preparation, will give procedures for sampling sidewall blocks.iv blankBS6043-3.1.1:1999 BSI 04-2000 1 Introduction Details of the sampling of shaped refractory products in general are given in ISO5022, which gives the statistical basis for sampling plans for acceptance testing of
16、a consignment or lot. Cathode blocks used in the production of aluminium have specific requirements for sampling and, while the statistical basis for sampling given in ISO5022 applies, further or modified requirements also apply. 1 Scope This part of ISO8007 specifies procedures for sampling consign
17、ments of cathode blocks used in the production of aluminium and for taking test samples from individual blocks. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of ISO8007. For dated references, subs
18、equent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part of ISO8007are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest
19、 edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 5022:1979, Shaped refractory products Sampling and acceptance testing. ISO 6206:1979, Chemical products for industrial use Sampling Vocabulary. 3 Definiti
20、ons For the purposes of this part of ISO8007, the definitions given in ISO5022and ISO6206apply. 4 Apparatus Use suitable core-drilling equipment with cutting edges preferably coated with diamond or another extremely hard material. 5 Taking test samples from individual cathodes 5.1 Procedure Cathode
21、blocks shall be sampled, by core drilling or sawing, in accordance with the provisions of ISO5022and with the additional requirements given in5.2, 5.3 and5.4 of this part of ISO 8007. Examples of sample locations are given in Figure 1 and Figure 2. Cathode blocks produced with a collector-bar slot s
22、hall be considered separately from those produced without a slot when determining the locations from which test sample(s) will be taken. The locations from which test samples will be taken shall be agreed between the seller and buyer in accordance with 5.2 or5.3. 5.2 Cathode blocks produced without
23、a collector-bar slot The positions from which test samples can be drilled from cathode blocks produced without a collector-bar slot are restricted because, after sampling, the cathode block will be used as part of an electrolysis cell. Test samples shall therefore be taken from the part of the catho
24、de block that will be machined out as the slot. Sampling shall not weaken the cathode block or increase the likelihood of premature failure. Extreme care shall be exercised when taking vertically drilled samples. Examples of positions from which test samples can be taken are shown in Figure 1. 5.3 C
25、athode blocks produced with a collector-bar slot Consignments may be delivered with a proportion of the cathode blocks manufactured to a length that is greater than that which will ultimately be required for use. This is indicated in Figure 2 as the “extra length”. The seller and buyer shall agree o
26、n the proportion of extra-length cathode blocks in a consignment. NOTEIt is strongly recommended that such an agreement to supply a proportion with extra length is made. Sampling from the extra-length part of the cathode block is preferred because the part of the cathode block that has been drilled
27、will ultimately be machined away when the block is cut to final length. When sampling extra-length cathode blocks, test samples shall be taken horizontally and vertically, spreading the sampling locations evenly over the entire cross-section of the block.BS6043-3.1.1:1999 2 BSI 04-2000 When no extra
28、-length cathode blocks are available, test samples shall be taken horizontally and vertically, but the options are more restricted. Sampling shall not weaken, contaminate or cause the destruction of the block. Extreme care shall be exercised when taking vertically drilled samples. The availability o
29、r non-availability of extra-length cathode blocks for sampling purposes shall be reported under item e) of the sampling report. Examples of positions from which test samples can be taken are shown in Figure 2. Figure 1 Examples of sampling-point locations for cathode blocks without a slot key 1 Extr
30、a length Figure 2 Examples of sampling-point locations for cathode blocks with a slotBS6043-3.1.1:1999 BSI 04-2000 3 5.4 Dimensions of test samples Choose the dimensions of each test sample according to the test to be carried out. The smallest dimension (usually the diameter) shall be at least three
31、 times the maximum particle size of the dry aggregate. Refer to the International Standards relating to the tests to be carried out to ensure that the test samples taken from the cathode block are of suitable dimensions. Where a standard does not specify the dimensions of the test pieces, a diameter
32、 of30mm or50mm is recommended, as well as a length which is at least1,5times the diameter. The cross-section of the test samples shall be circular. If parallel-sided test pieces are to be prepared from the test samples, the diameter shall be sufficient to allow this. Report the dimensions of the tes
33、t samples under item g) of the sampling report. 6 Sampling report The sampling report shall include the following: a) the names of the producer and customer; b) the number and reference marking of the batch(es); c) a reference to this part of ISO8007, i.e.ISO8007-1; d) the date and place of sampling
34、; e) complete details of the sampling plan operated; f) the proportion and number of extra-length cathode blocks, if available for sampling; g) a sketch showing the locations of the sampling points and the direction of sampling (horizontally or vertically) (examples are given in Figure 1 andFigure 2
35、); h) the dimensions of the test samples; i) details (name and job title) of the person(s) carrying out the sampling.BS 6043-3.1.1: 1999 ISO 8007-1: 1999 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStan
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