ISO NTERNATIONAL STANDARD 902 Aluminium oxide primarily used for the production of aluminium -- Measurement of the angle of repose Oxyde d'aluminium principalement utilise pour la production deI'aluminium-MesuragedeI'angle du talus d'éboulement First edition -- 1976-09-15 UDC 661.862.22 : 620.1 : 539.215.9 Ref. No. 1SO 902-1976 (E) Descriptors:aluminium oxide,tests, measurement, angles of repose. Price based on 4 pages Copyright International Organization for Standardization Notfor Resale FOREWORD IsO (the International Organization for Standardization) is a worldwide federation of national standards institutes (IsO Member Bodies). The work of developing International Standards is carried out through ISO Technical Committees. Every Member Body interested in a subject for which a Technical Committee has been set up 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. Draft International Standards adopted by the Technical Committees are circulated to the Member Bodies for approval before their acceptance as International Standards by the ISO Council. Prior to 1972, the resulits of the work of the Technical Committees were published as isO Recommendations; these documents are now in the process of being transformed into International Standards. As part of this process, Technical Committee iSO/TC 47 has reviewed iSO Recommendation R 902 and found it technically suitable for transformation. International Standard iSO 902 therefore replaces ISO Recommendation R 902-1968 to which it is technically identical. ISO Recommendation R 902 was approved by the Member Bodies of the following countries : Ireland South Africa, Rep. of Austria Belgium Israel Spain Bulgaria Italy Sweden Canada Japan Switzerland Czechoslovakia Korea, Rep. of Thailand Egypt, Arab Rep. of Netherlands Turkey France New Zealand United Kingdom Germany Norway U.S.A. Hungary Poland U.S.S.R. India Portugal Yugoslavia Iran Romania No Member Body expressed disapproval of the Recommendation. The Member Body of the following country disapproved the transformation of ISO/R 902 into an International Standard : Egypt, Arab Rep. of International Organization for Standardization, 1976 : Printed in Switzerland Copyright International Organization for Standardization nse from IHS Not for Resale INTERNATIONAL STANDARD ISO 902-1976 (E) Aluminium oxide primarily used for the production of aluminium --- Measurement of the angle of repose 1 SCOPE AND FIELD OF APPLICATION 4.3 Funnel support, made in stainless steel and of sub- stantial construction. It is designed so.that the axis of This International Standard specifies a conventional the funnel is vertically over the central locating pin. method for the measurement of the angle of repose of aluminium oxide primarily used for the production of 4.4 Height block, consisting of a metal cylinder with aluminium. polished faces of height 40,0 mm. The base has a recess to engage the central locating pin of the base-plate. 2 REFERENCES is0 802. Aluminium oxide primarily used for the production of aluminium - Preparation and storage of test 5 PROCEDURE samples. ISo 2927, Aluminium oxide primarily used for the 5.1 Sample production of aluminium -- Sampling. Use the crude sample (see 3.2 of IS0 802), at a temperature of 22 ± 4 °c. 3PRINCIPLE Measurement of the angie at the base of the cone of 5.2 Determination 'aluminium oxide obtained by allowing a sample to fall through a fixed distance from a defined funnet onto a 5.2.1 Level the base-ptate (4.2) by means of the adjustable horizontal base plate. feet. 5.2.2 Put the height block (4.4) in position and adjust the 4 APPARATUS funnel (4.1) 'until the nozzle is just in contact with the Only the dimensions given in the text are mandatory. block. Secure the funnel in position and remove the height block. The apparatus (see the figure) consists of the following items : 5.2.3 Feed the alumini