BS ISO BRITISH STANDARD 20203:2005 Carbonaceous materials used in the production of aluminium Calcined coke Determination of crystallite size of calcined petroleum coke by X-ray diffraction ICS 77.120.10 BSi NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW British Standards BS ISO 20203:2005 National foreword This British Standard reproduces verbatim ISO 20203:2005 andimplements it as the UK national standard. The UK participation in its preparation was entrusted by Technical 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 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 publications referred to in this document may be found 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 responsible for its correct application. Compliance with a British Standard does not ofitself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages i to iv, pages 1 to 7 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication This British Standard was Amd. No. Date Comments published under the authority of the Standards Policy and Strategy Committee on 12 January2006 BSI 12 January 2006 ISBN 0 580 47126 8 BSIS020203:2005 ISO INTERNATIONAL STANDARD 20203 First edition 2005-10-01 Carbonaceous materials usedinthe production of aluminium Calcined cokeDeterminationofcrystallitesize of calcined petroleum coke by X-ray diffraction Produits carbonés utiliséspourlaproductiondeI'aluminiumCoke calcineDetermination de la taille de la cristallite du coke calcine de petrolepardiffractionauxrayonsX Reference number ISO 20203:2005(E) ii BSIS020203:2005 Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies 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. adopted by the technical committees are circulated to the member bodies for voting. Publication as an rights. IsO shall not be held responsible for identifying any or all such patent rights. ISO20203was prepared by Technical Committee ISO/TC 226,Materials for the production of primary aluminium. i BSIS020203:2005 Introduction HarborDrive,PO BoxC700, West Conshohocken, PA19428-2959, United States. and Lubricants as the direct responsibility of Subcommittee D02.05.0D on Petroleum Coke Sampling and Procedures, and was published in December 1991. The crystallinity of petroleum coke, as reflected by the L. value, is a general measure of quality affecting suitability for end use and is a function of the heat treatment used. The crystallite height is used to determine the extent of such heat treatment, for example, during calcination. crystalline materials such as dedust oil. iv BSISO20203:2005 Carbonaceous materials used in the production of aluminium - Calcined coke Determination of crystallite size of calcined petroleum coke by X-ray diffraction SAFETY PRECAUTIONS-This International Standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard