1、INTERNATIONAL S 3 INTFRNATION4L ORGANIZATION FOR STANDARDIZATION .MIx.lb 144ftClH411 OP1 Aliii3411UH I70 CTAH34PTU3AUUU .ORGANISATION INTERNATIONALE DE NORMALISATION Aluminium oxide primarily used for the production of aluminium - Determination of untamped density Oxyde daluminium principalement uti
2、lise pour la production de Ialuminium - Determination de la densite apparen te First edition - 1976-09-15 r ; f p,. , ,t 9 ,(/I id, ! A$ a$ ; ; g f t;i i,;.:(!.: j$.(j ,i ,l+)r:“! ;$y:; UDC 661.862.22 : 531.755.2 Descriptors : alumlnium oxide. tests, density measurement, bulk density. Ref. No. IS0 9
3、03-1976 (E) Price based on 2 pages Copyright International Organization for Standardization Provided by IHS under license with ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-,-FOREWORD IS0 (the International Organization for Standardization) is a worldwide federa
4、tion of national standards institutes (IS0 Member Bodies). The work of developing International Standards is carried out through IS0 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. Inte
5、rnational 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 IS0 Council. Prior
6、 to 1972, the results of the work of the Technical Committees were published as IS0 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 IS0 Recommendation R 903 and found it tec
7、hnically suitable for transformation. International Standard IS0 903 therefore replaces IS0 Recommendation R 903-1968 to which it is technically identical. IS0 Recommendation R 903 was approved by the Member Bodies of the following countries : Austria Belgium Bulgaria Canada Czechoslovakia Egypt, Ar
8、ab Rep. of France Germany Hungary India Iran Ireland Israel Italy Japan Korea, Rep. of Netherlands New Zealand Norway Poland Portugal Romania Spain South Africa, Rep. of Sweden Switzerland Thailand Turkey United Kingdom U.S.A. U.S.S.R. Yugoslavia No Member Body expressed disapproval of the Recommend
9、ation. The Member Body of the following country disapproved the transformation of ISO/R 903 into an International Standard : Egypt, Arab Rep. of 0 International Organization for Standardization, 1976 l Printed in Switzerland Copyright International Organization for Standardization Provided by IHS un
10、der license with ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-,-INTERNATIONAL STANDARD IS0 903-1976 (E) Aluminium oxide primarily used for the production of aluminium - Determination of untamped density 1 SCOPE AND FIELD OF APPLICATION This International Standa
11、rd specifies a method for the determination of the untdmped density of aluminium oxide primarily used for the production of aluminium. 2 REFERENCES IS0 802, Aluminium oxide primarily used for the production of aluminium - Preparation and storage of test samples. IS0 2927, Aluminium oxide primarily u
12、sed for the production of aluminium - Sampling. 3 PRINCIPLE Determination of the mass of a known volume of aluminium oxide collected after allowing it to fall freely into a stationary container, avoiding vibration. Expression of the untamped density by division of this mass by the mass of an equal v
13、olume of water. 4 APPARATUS 4.1 Funnel, of diameter 10 cm and angle 60”. with a stem of length 8 mm and aperture diameter of 6 mm. 4.2 Cylindrical container, of capacity approximately 200 ml, with a ratio of internal diameter to internal length l/6 approximately. 4.3 Suitable stand and ring support,
14、 to allow the funnel (4.1) to be set to a predetermined height above the top level of the cylindrical container (4.2). 5 PROCEDURE 5.1 Sample Use the crude sample (see 3.2 of IS0 802). 5.2 Determination Set the cylindrical container (4.2) on a flat base. Adjust the funnel (4.1) so that its axis coin
15、cides approximately with that of the cylinder, with the tip of the funnel at a height of 10 cm above the cylindrical container top. Feed the aluminium oxide into the centre of the funnel at about 40 mm above the funnel so as not to communicate any vibration to the apparatus, at about 20 to 60 g/min.
16、 If blocking occurs at the stem, facilitate the passage of the aluminium oxide with a piece of wire, taking care not to vibrate the cylindrical container. Stop the feed when the aluminium oxide has formed a cone above the top level of the cylindrical container and is spilling over. Remove the cone o
17、f surplus aluminium oxide by gently drawing a straight edge across the top rim of the cylindrical container, without communicating any vibration to the latter. Weigh the cylindrical container and its contents. 6 EXPRESSION OF RESULTS The untamped density is given by the formula m2 -m0 ml -m0 where m
18、, is the mass, in grams, of the empty cylindrical container (4.2); ml is the mass, in grams, of the cylindrical container full of distilled water; m2 is the mass, in grams, of the cylindrical container full of aluminium oxide; If the cylindrical container used has a capacity of exactly 200 ml, the f
19、ormula for the calculation of untamped density becomes m2 -m0 200 It will usually be more convenient to use one particular cylindrical container of capacity approximately 200 ml and determine the value of (m, - rn,) to be used in all determi- nations. 7 TEST REPORT The test report shall include the
20、following particulars : a) the reference of the method used; b) the results and the method of expression used; c) any unusual features noted during the deter- mination; d) any operation not included in this International Standard or in the International Standards to which reference is made, or regar
21、ded as optional. 1 Copyright International Organization for Standardization Provided by IHS under license with ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-,-IS0 903-1976 (E) ANNEX IS0 PUBLICATIONS RELATING TO ALUMINIUM OXIDE PRIMARILY USED FOR THE PRODUCTION O
22、F ALUMINIUM IS0 802 - Preparation and storage of test samples. IS0 803 - Determination of loss of mass at 300 “C (conventional moisture). IS0 804 - Preparation of solution for analysis - Method by alkaline fusion. IS0 805 - Determination of iron content - l,lO-Phenanthroline photometric method. IS0
23、806 - Determination of loss of mass at 1 000 and 1 200 “C. IS0 900 - Determination of titanium content - Diantipyrylmethane photometric method. IS0 901 - Determination of absolute density - Pyknometer method. IS0 902 - Measurement of the angle of repose. IS0 903 - Determination of untamped density.
24、IS0 1232 - Determination of silica content - Reduced molybdosilicate spectrophotometric method. IS0 1617 - Determination of sodium content - Flame emission spectrophotometric method. IS0 1618 - Determination of vanadium content - A/-Benzoyl-N-phenylhydroxylamine photometric method. IS0 2069 - Determ
25、ination of calcium content - Flame atomic absorption method. ISO/R 2070 - Determination of calcium content - Spectrophotometric method using naphthalhydroxamic acid, IS0 2071 - Determination of zinc content - Flame atomic absorption method. ISO/R 2072 - Determination of zinc content - PAN photometri
26、c method. IS0 2073 - Preparation of solution for analysis - Method by hydrochloric acid attack under pressure. IS0 2828 - Determination of fluorine content - Alizarin complexone and lanthanum chloride spectrophotometric method, IS0 2829 - Determination of phosphorus content - Reduced phosphomoiybdat
27、e spectrophotometric method, IS0 2865 - Determination of boron content - Curcumin spectrophotometric method. IS0 2926 - Particle size analysis - Sieving method. IS0 2927 - Sampling. IS0 2961 - Determination of an adsorption index. IS0 3390 - Determination of manganese content - Flame atomic absorption method. 2 Copyright International Organization for Standardization Provided by IHS under license with ISONot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
