ISO INTERNATIONAL STANDARD 10236 First edition 1995-11-15 Carbonaceous materials for the production of aluminium Green coke and calcined coke for electrodes -- Determination of bulk density (tapped) Produits carbonés utilisés pour la production de I'aluminium -- Coke cru et apparente (apres tassement) ISO Reference number ISO10236:1995(E) IHS under No reproduction or networking permitted without license from IHS Not for Resale ISO10236:1995(E) Foreword IsO (the International Organization for Standardization) is a worldwide fed- eration of national standards bodies (lsO member bodies). The work of 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 collabo- all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International a vote. ISO/TC 47, Chemistry. Subcommittee SC 7, Aluminium oxide, cryolite, aluminium fluoride, sodium fluoride, carbonaceous products for the alu- minium industry. ISO1995 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced microfilm, without permission in writing from the publisher. International Organization for Standardization Case postale 56 · CH-1211 Geneve 20 · Switzerland Printed in Switzerland for Standardizatior Not for Resale INTERNATIONAL STANDARD @ISO ISO 10236:1995(E) Carbonaceous materials for the production of aluminium - Green coke and calcined coke for electrodes - Determination of bulk density (tapped) 1 Scope 3 Principle This International Standard specifies a method for the The volume of a known mass of material is deter- measurementofthebulkdensityofgranularcarbon mined after tapping. The bulk density (tapped) is calcu- and graphite materials used in the manufacture of lated by division of the known mass by the measured carbon electrodes for the production of aluminium. volume. Bulk density depends on the size, shape and porosity of the granules. For samples with similar grain size 4 Apparatus andshape,comparisonoftherealdensitywiththe bulk density (tapped) allows the porosity to be as- Ordinary laboratory apparatus, plus the following: sessed. Coke porosity is an important quality par- ameter which can affect the quality and performance 4.1 Bulk density measuring device, as shown in of the carbon electrodes. figure 1, comprising the elements specified in 4.1.1 to 4.1.3. 4.1.1 Measuring cylinder, having a 2 Normative references massof 190 g± 15 g, with a scale reading from 0 to 250 ml, capable of measuring to ± 1,0 ml. The following standards contain provisions which, throughreferenceinthistext,constituteprovisions of 4.1.2 Cylinder holder, having a guided plunger with this International Standard. At the time of publication a mass of 450 g ± 5 g. the editionsindicated werevalid.All standards are subject to revision,and parties to agreements based on this International Standard are encouraged to in- 4.1.3 Tapping device, capable of raising and drop vestigate the possibility of applying the most recent ping the plunger (see 4.1.2) 250 ± 15 times per minute from a height of 3 mm ± 0,1 mm, fitted with a counter editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid to record the number of taps. International Standards. 4.2 Test sieves, complying with the requirements of ISO 3310-1:1990, Test sieves ISO3310-1. Technicalrequire mentsandtesting-Part1:Testsievesofmetalwire 4.3 Oven, capable being cloth. maintained at 120°℃±5C. ISO 6375:1980, Carbonaceous materials for the pro- duction of aluminium - Coke for electrodes -Sam- 4.4 Feeder, capable of filling the measuring cylinder pling. in a controlled manner. 1 Copyright International Organization for Standardization n or networking permitted without license from IHS Not