1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO 12315:2010Aluminium oxide primarily used for production of aluminium Method for calculating the Al2O3content of smelter-grade aluminaBS ISO 12315:2010 BRITISH STANDARDNati
2、onal forewordThis British Standard is the UK implementation of ISO 12315:2010. The UK participation in its preparation was entrusted to TechnicalCommittee CII/24, Raw materials for the aluminium industry. A list of organizations represented on this committee can beobtained on request to its secretar
3、y.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2010 ISBN 978 0 580 66356 7 ICS 71.100.10 Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was publishe
4、d under the authority of theStandards Policy and Strategy Committee on 31 July 2010 Amendments issued since publicationDate T e x t a f f e c t e dBS ISO 12315:2010Reference numberISO 12315:2010(E)ISO 2010INTERNATIONAL STANDARD ISO12315First edition2010-05-15Aluminium oxide primarily used for produc
5、tion of aluminium Method for calculating the Al2O3content of smelter-grade alumina Oxyde daluminium principalement utilis pour la production daluminium Mthode de calcul de la teneur en Al2O3de lalumine pour lectrolyse BS ISO 12315:2010ISO 12315:2010(E) PDF disclaimer This PDF file may contain embedd
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10、ter. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2010 All rights reservedBS ISO 12315:2010ISO 12315:2010(E) ISO 2010 All rights reserved iiiForeword ISO (the International
11、Organization for Standardization) is a worldwide federation of national standards bodies (ISO 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 esta
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13、tion. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for votin
14、g. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such
15、patent rights. ISO 12315 was prepared by Technical Committee ISO/TC 226, Materials for the production of primary aluminium. This International Standard is based on AS 2879.11, Alumina Guide to reporting Al2O3content of smelter-grade alumina, prepared by the Standards Australia Committee MN/9, Alumin
16、a and Materials Used in Aluminium Production. BS ISO 12315:2010BS ISO 12315:2010INTERNATIONAL STANDARD ISO 12315:2010(E) ISO 2010 All rights reserved 1Aluminium oxide primarily used for production of aluminium Method for calculating the Al2O3content of smelter-grade alumina 1 Scope This Internationa
17、l Standard describes methods for calculating and reporting the Al2O3content of smelter-grade alumina, on either a dry or ignited basis, from the results of the determinations in accordance with ISO 806 and AS 2879.7. NOTE Typical values of a smelter-grade alumina, if reported on a dry basis, would b
18、e in the range of 98,5 % to 98,9 % and, if reported on an ignited basis, would be in the range of 99,4 % to 99,7 % mass fraction. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. Fo
19、r undated references, the latest edition of the referenced document (including any amendments) applies. ISO 806, Aluminium oxide primarily used for the production of aluminium Determination of loss of mass at 300 C and 1 000 C AS 2879.7, Alumina Determination of trace elements Wavelength dispersive
20、X-ray fluorescence spectrometric method1)3 Principle From the determination of trace elements in accordance with AS 2879.7, where the elements are determined on an undried (“as-received” basis) by X-ray fluorescence spectrometry analysis, and the loss of mass at 300 C and 1 000 C is determined in ac
21、cordance with ISO 806, the proportion by mass is calculated and expressed as a percentage. The Al2O3content of alumina, expressed as a percentage (mass fraction), is calculated by subtracting the percentage of trace elements from the total, expressed as 100 %. The Al2O3content of alumina can be expr
22、essed on a dried basis or an ignited basis. The dried basis method eliminates the effect of loss of mass after heating to 300 C, under defined conditions. The ignited basis method eliminates the loss of mass after heating to 1 000 C, under defined conditions. Sulfur (S) shall be determined and inclu
23、ded as its oxide, SO2, in the sum of impurities term, I, if the alumina is derived from heavy-fuel-oil calcination. Sulfur from this source is largely present as adsorbed SO2. There is no standard method for determining sulfur in alumina. 1) To be replaced by ISO 23201, Aluminium oxide primarily use
24、d for production of aluminium Determination of trace elements Wavelength dispersive X-ray fluorescence spectrometric method (under preparation). BS ISO 12315:2010ISO 12315:2010(E) 2 ISO 2010 All rights reservedNOTE 1 By industry convention, these mass losses are often referred to as “moisture on ign
25、ition (MOI)” and “loss on ignition (LOI)”, respectively. NOTE 2 When sulfur is determined, it is traditionally reported as SO3, not SO2. 4 Procedures The determinations shall be as follows. a) Determine the impurities according to AS 2879.7. b) Determine the loss of mass at 300 C (moisture content,
26、MOI) and loss of mass on ignition at 1 000 C (LOI) (on a dry or “as-received” basis) in accordance with ISO 806. c) Determine the sulfur, reported as SO3, if the alumina is derived from heavy-fuel-oil calcination. 5 Calculations and expression of results Calculate and express the results as follows:
27、 a) Al2O3content determined on an ignited at 1 000 C basis: 1) for loss on ignition of alumina determined on a dried at 300 C basis, the Al2O3content, expressed as a percentage, is calculated using Equation (1). ()23Al O ,1000,d1000,d 300300 1000,d100100100100wIwwww= +(1) where wAl2O3, 1 000,dis the
28、 Al2O3content determined on an ignited at 1 000 C basis, expressed as a percentage; w300is the loss of mass at 300 C, expressed as a percentage; w1 000,dis the loss of mass on ignition (300 C to 1 000 C), expressed on a dried at 300 C basis; I is the sum of trace elements determined in accordance wi
29、th AS 2879.7. SO3shall be included in this sum, if required. 2) for loss on ignition of alumina determined on an “as-received” basis calculate the Al2O3content, expressed as a percentage, using Equation (2). ()()23Al O ,1000,ar300 1000,ar100100100wIww= (2) where wAl2O3, 1 000,aris the Al2O3content d
30、etermined on an ignited at 1 000 C basis, expressed as a percentage; w300is the loss of mass at 300 C, expressed as a percentage; BS ISO 12315:2010ISO 12315:2010(E) ISO 2010 All rights reserved 3w1 000,aris the loss of mass on ignition (300 C to 1 000 C) expressed on an “as-received” basis; I is the
31、 sum of the trace-element oxides determined in accordance with AS 2879.7. SO3shall be included in this sum, if required. b) Al2O3content determined on a dried at 300 C basis: 1) for loss on ignition of alumina determined on a dried at 300 C basis, the Al2O3content, expressed as a percentage, is calc
32、ulated using Equation (3). ()23Al O , 300,d 1000,d300100100100ww Iw= (3) where wAl2O3, 300,dis the Al2O3content determined on a dried at 300 C basis, expressed as a percentage, w300is the loss of mass at 300 C, expressed as a percentage; w1 000,dis the loss of mass on ignition (300 C to 1 000 C) on
33、a dried basis; I is the sum of the trace-element oxides determined in accordance with AS 2879.7. SO3shall be included in this sum, if required. 2) for loss on ignition of alumina determined on an “as-received” basis calculate the Al2O3content, expressed as a percentage, is calculated using Equation
34、(4). ()()23Al O , 300,ar 1000,ar300100100100wwIw= +(4) where wAl2O3, 300,aris the Al2O3content determined on a dried at 300 C basis, expressed as a percentage; w300is the loss of mass at 300 C, expressed as a percentage; w1 000,aris the loss of mass on ignition (300 C to 1 000 C), expressed on an “a
35、s-received” basis; I is the sum of the trace-element oxides determined in accordance with AS 2879.7. SO3shall be included in this sum, if required. 6 Test report The test report should include the following information: a) a reference to this International Standard; b) the date on which the sample w
36、as taken; c) the date of the determinations and calculations; d) details necessary for the complete identification of the material tested; BS ISO 12315:2010ISO 12315:2010(E) 4 ISO 2010 All rights reservede) whether the Al2O3content was determined and calculated on a dried at 300 C or ignited at 1 00
37、0 C basis; f) the Al2O3content, recorded to the nearest first decimal place. BS ISO 12315:2010BS ISO 12315:2010ISO 12315:2010(E) ICS 71.100.10 Price based on 4 pages ISO 2010 All rights reserved This page deliberately left blankBSI is the independent national body responsible for preparing British S
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