BS-6043-1.8-1986 ISO-8006-1985.pdf
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1、BRITISH STANDARD BS 6043-1.8: 1986 ISO 8006:1985 Methods of sampling and test for Carbonaceous materials used in aluminium manufacture Part 1: Electrode pitch Section 1.8 Determination of ash (ISO title: Carbonaceous materials used in the production of aluminium Pitch for electrodes Determination of
2、 ash) UDC 661.66:669.71.012.23:620.1 Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:17:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6043-1.8:1986 This British Standard, having been prepared under the direction of the Chemicals Standards Committee, was published under the authority of
3、the Board of BSI and comes into effect on 29 August 1986 BSI 10-1999 The following BSI references relate to the work on this standard: Committee reference CIC/24 Draft for comment 83/56064 DC ISBN 0 580 15315 0 Committees responsible for this British Standard The preparation of this British Standard
4、 was entrusted by the Chemicals Standards Committee (CIC/-) to Technical Committee CIC/24, upon which the following bodies were represented: Aluminium Federation British Ceramic Research Association British Tar Industry Association Chemical Industries Association Institute of Petroleum Refractories
5、Association of Great Britain Standardization of Tar Products Tests Committee Amendments issued since publication Amd. No.Date of issueComments Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:17:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6043-1.8:1986 BSI 10-1999i Contents Page Commit
6、tees responsibleInside front cover National forewordii 1Scope and field of application1 2References1 3Principle1 4Apparatus1 5Sampling and samples1 6Procedure1 7Expression of results2 8Test report2 Figure Graph of repeatability rj and of reproducibility Rj as a function of mean level3 Publications r
7、eferred toInside back cover xj Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:17:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6043-1.8:1986 ii BSI 10-1999 National foreword This British Standard has been prepared under the direction of the Chemicals Standards Committee to provide meth
8、ods of sampling and test for carbonaceous materials used in the production of aluminium. The standard is published in two Parts, each Part being divided into Sections. The two Parts are: Part 1: Electrode pitch; Part 2: Electrode coke. Initially it is proposed that Part 1 will comprise the following
9、 Sections: The UK did not approve the determination of density (by pyknometer) method given in ISO 6999:1983 and a national version is being prepared. Other international methods of test for electrode pitch are under consideration and, subject to approval by the United Kingdom, will be published as
10、they become available. This Section is identical with ISO 8006 “Carbonaceous materials used in the production of aluminium Pitch for electrodes Determination of ash”, published by the International Organization for Standardization (ISO). Terminology and conventions. The text of the International Sta
11、ndard has been approved as suitable for publication as a British Standard without deviation. Some terminology and certain conventions are not identical with those used in British Standards; attention is drawn especially to the following. The comma has been used throughout as a decimal marker. In Bri
12、tish Standards it is current practice to use a full point on the baseline as the decimal marker. Wherever the words “International Standard” appear, referring to this standard, they should be read as “British Standard”. The Technical Committee has reviewed the provisions of ISO 5725, to which refere
13、nce is made in 7.2, and has decided that they are acceptable for use in conjunction with this standard. A related British Standard for ISO 5725 is BS 5497, “Precision of test methods” Part 1 “Guide for the determination of repeatability and reproducibility for a standard test method”. SectionSubject
14、Identical with 1.1SamplingISO 6257 1.2Water content (Dean and Stark method)ISO 5939 1.3Softening point (ring and ball method)ISO 5940 1.4Content of toluene-insoluble materialISO 6376 1.5Content of quinoline-insoluble materialISO 6791 1.6Coking valueISO 6998 1.7Density 1.8Ash contentISO 8006 1.9Sulph
15、ur contentISOa a In preparation. Cross-references International StandardCorresponding British Standard ISO 6257:1980BS 6043 Methods of sampling and test for carbonaceous materials used in aluminium manufacture Part 1 Electrode pitch Section 1.1:1981 Sampling (Identical) ISO 5939:1980Section 1.2:1981
16、 Determination of water content (Dean and Stark method) (Identical) Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:17:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6043-1.8:1986 BSI 10-1999iii Additional information. This standard describes methods of test only, and should not be used
17、or quoted as a specification defining limits of purity. Reference to this Section should state that the method of test used is in accordance with BS 6043-1.8:1986. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible fo
18、r 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 to iv, pages 1 to 4, an inside back cover and a back cover. This standard has been updated
19、 (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:17:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: sheffieldun sheffieldun, na, Wed
20、 Dec 06 14:17:48 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6043-1.8:1986 BSI 10-19991 1 Scope and field of application This International Standard specifies a method for the determination of ash in the pitch for electrodes used in the production of aluminium. The method is applicable to products
21、 (tar pitch, petroleum pitch, etc.) producing a quantity of ash greater than or equal to 0,05 % (m/m). If it is required to express the result on the dry product, carry out the water determination by azeotropic distillation as specified in ISO 5939. Refer the result of the determination of ash obtai
22、ned on the product as such, to the dry product. NOTEThis ash may be utilised for subsequent elemental analysis. 2 References ISO 5725, Precision of test methods Determination of repeatability and reproducibility by inter-laboratory tests. ISO 5939, Carbonaceous materials for the production of alumin
23、ium. Determination of water content Azeotropic distillation (Dean and Stark). ISO 6257, Carbonaceous materials for the production of aluminium Pitch for electrodes Sampling. 3 Principle Heating of a test portion in a tared platinum crucible, in a furnace at 700 C, under oxidizing and specified condi
24、tions, to constant mass. 4 Apparatus Ordinary laboratory apparatus and 4.1 Platinum crucible, low form, of capacity approximately 50 ml. 4.2 Electric furnace, capable of being controlled at 700 10 C and provided with air circulation. 4.3 Electric oven, capable of being controlled at 150 5 C. 5 Sampl
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