BS ISO BRITISH STANDARD 23202:2006 Aluminium oxide used for the production of aluminium - Determination of particles passing a 2o micrometreaperture sieve ICS 71.100.10 BSi NOCOPYINGWITHOUTBSIPERMISSIONEXCEPTASPERMITTEDBYCOPYRIGHTL British Standards BS ISO 23202:2006 National foreword This British Standard was published by BSI. It is the UK implementation of ISO 23202:2006. The UK participation in its preparation was entrusted to Technical Committee CII/24, Raw materials for the aluminium industry. A list of organizations represented on CII/24 can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was Amendments issued since publication published under the authority of the Standards Policy and Amd. No. Date Comments Strategy Committee on30March2007 CBSI2007 ISBN9780580504600 BS IS0 23202:2006 INTERNATIONAL ISO STANDARD 23202 First edition 2006-06-01 Aluminium oxide used for the production of aluminium Determination of particles passing a 20 micrometre aperture sieve Oxyde d'aluminium utilise pour la production de I'aluminium - Détermination de la finesse des particules: mesure du passant a 20 micrometres Reference number ISO 23202:2006(E) = BS ISO 23202:2006 Contents Page Foreword Introduction 1 Scope 2 Normative references 3 Principle. 4 Safety. 5 Reagents 6 Apparatus.... 7 Sampling and sample preparation... 8 Procedure...... 9 Calculation and expression of results 10 Precision.. 11 Quality control . 12 Test report. Annex A (informative) Results of test programme ..... Annex B (normative) Determination of effective aperture of the test sieve.. Bibliography.... ii BS IS0 23202:2006 Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies (SO 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 InternationalElectrotechnicalCommission(lEC)onallmattersofelectrotechnicalstandardization. International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 2 adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. rights. IsO shall not be held responsible for identifying any or all such patent rights. ISO 23202 was prepared by Technical Committee ISO/TC 226, Materials for the production of primary aluminium. iv BS IS0 23202:2006 Introduction This International Standard is based on Australian method, As 2879.2-2003, Alumina Determination of particles passing a 20 micrometre aperture sieve. The Minus 20 Micron reference material ASCRM 026 was released in December 2003 by SAl Global, along with a Technical Report on its preparation (TR 2.26-2003, Certified reference materials - Alumina http://www.standards.com.au/ V