ISO 12315:2010

INTERNATIONAL ISO
STANDARD 12315
First edition
2010-05-15
Aluminium oxide primarily used for
production of aluminium — Method for
calculating the Al O content of smelter-
2 3
grade alumina
Oxyde d'aluminium principalement utilisé pour la production
d'aluminium — Méthode de calcul de la teneur en Al O de l'alumine
2 3
pour électrolyse
Reference number
©
ISO 2010
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Foreword
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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 Al O content of smelter-
2 3
grade alumina, prepared by the Standards Australia Committee MN/9, Alumina and Materials Used in
Aluminium Production.
INTERNATIONAL STANDARD ISO 12315:2010(E)

Aluminium oxide primarily used for production of aluminium —
Method for calculating the Al O content of smelter-grade
2 3
alumina
1 Scope
This International Standard describes methods for calculating and reporting the Al O content of smelter-
2 3
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 be 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. For 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 X-ray fluorescence
1)
spectrometric method
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 accordance with ISO 806, the proportion by mass is calculated and
expressed as a percentage.
The Al O content of alumina, expressed as a percentage (mass fraction), is calculated by subtracting the
2 3
percentage of
...