BS-ISO-17500-2006.pdf
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1、BRITISH STANDARD BS ISO 17500:2006 Aluminium oxide used for the production of primary aluminium Determination of attrition index ICS 71.100.10 ? Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 05:45:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 17500:2006 This British Standard was publ
2、ished under the authority of the Standards Policy and Strategy Committee on 31 July 2006 BSI 2006 ISBN 0 580 48865 9 National foreword This British Standard reproduces verbatim ISO 17500:2006 and implements it as the UK national standard. The UK participation in its preparation was entrusted to Tech
3、nical Committee CII/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 change, and keep UK interests informed; monitor r
4、elated 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 publications referred to in this document may be found
5、 in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are respon
6、sible for its 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, the ISO title page, pages ii to v, a blank page, pages 1 to 9 and a back cover. The BSI copy
7、right notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 05:45:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Reference number ISO 17500:2006(E) INTERNATIONAL S
8、TANDARD ISO 17500 First edition 2006-04-01 Aluminium oxide used for the production of primary aluminium Determination of attrition index Oxyde daluminium utilis pour la production de laluminium primaire Dtermination de lindex dattrition BS ISO 17500:2006 Licensed Copy: sheffieldun sheffieldun, na, M
9、on Nov 27 05:45:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 05:45:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iii Contents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references. 1 3 Principle. 1 4 Apparatus 1 5 Sample handlin
10、g and preparation. 3 5.1 Reference alumina 3 5.2 Test sample . 3 6 Procedure 3 6.1 Flow calibration. 3 6.2 Attrition procedure for test sample and reference alumina. 6 6.3 Particle size distribution analysis. 6 7 Calculation and reporting of results. 6 8 Precision 7 9 Quality control. 7 10 Test repo
11、rt . 7 Annex A (informative) Results of test programme . 8 Bibliography. 9 BS ISO 17500:2006 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 05:45:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of na
12、tional standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through 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. Intern
13、ational organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the
14、rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by
15、at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 17500 was prepared by Technical Committee ISO/
16、TC 226, Materials for the production of primary aluminium. BS ISO 17500:2006 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 05:45:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI v Introduction This International Standard is based on Australian method, AS 2879.10-2003, Alumina Determination of
17、attrition index. The Attrition Index reference material ASCRM 025 was released in December 2003 by SAI Global, along with a Technical Report on its preparation (TR 2.25-2003). These are available from SAI through their website: http:/.au/ BS ISO 17500:2006 Licensed Copy: sheffieldun sheffieldun, na,
18、 Mon Nov 27 05:45:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI blank Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 05:45:01 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 1 Aluminium oxide used for the production of primary aluminium Determination of attrition index 1 Scope This International
19、Standard specifies a procedure for the determination of the attrition index of smelter-grade alumina. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the la
20、test edition of the referenced document (including any amendments) applies. ISO 2926:2005, Aluminium oxide used for the production of primary aluminium Particle size analysis for the range 45 m to 150 m Method using electroformed sieves AS 2879.6-1995, Alumina Determination of the mass distribution
21、of particle sizes using electroformed sieves 3 Principle A test portion is attrited using a high velocity gas jet under controlled conditions using the attrition index apparatus. Flow in the apparatus is calibrated to a reference alumina. The particle size distribution is measured before and after a
22、ttrition. The attrition index is the relative percentage decrease in the + 45 m fraction under specific test conditions. 4 Apparatus 4.1 Attrition index apparatus. A typical assembled apparatus is shown in Figure 1 which consists of: a) Column Stainless steel, aluminium and glass columns of length 1
23、 500 mm to 1 600 mm and inside diameter 25 mm have been tested and found to be suitable. To minimize dust carryover, columns with larger-diameter upper sections are also suitable. A column of reduced overall length (700 mm) and upper diameter 64 mm has also been found to be suitable. In any case, mo
24、dified columns shall maintain the 25 mm ID for a minimum of 200 mm from the orifice plate. Also, they shall be constructed with a smooth tapered transition between sections, to ensure that alumina is not held up in the upper section of the column. Columns may also be provided with a timed automated
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