ISO 18842:2015

Aluminium oxide primarily used for the production of aluminium — Method for the determination of tapped and untapped density

ISO 18842:2015 describes methods for the determination of tapped and untapped bulk density of smelter grade aluminium oxide primarily used for the production of aluminium. Methods using the fall of sample into a receptacle have been found to be sensitive to flow rate variations, which are caused by physical properties of the aluminium oxide. ISO 18842:2015 minimizes flow rate variations.

Oxyde d'aluminium principalement utilisé pour la production d'aluminium — Méthode de détermination de la masse volumique tassée ou inexploitée

General Information

• Status: Published
• Publication Date: 09-Aug-2015
• ICS: 71.100.10 - Materials for aluminium production
• Technical Committee: ISO/TC 226 - Materials for the production of primary aluminium
• Drafting Committee: ISO/TC 226 - Materials for the production of primary aluminium
• Current Stage: 9093 - International Standard confirmed
• Completion Date: 24-Oct-2022

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 18842
First edition
2015-08-15
Aluminium oxide primarily used
for the production of aluminium —
Method for the determination of
tapped and untapped density
Oxyde d’aluminium principalement utilisé pour la production
d’aluminium — Méthode de détermination de la masse volumique
tassée ou inexploitée
Reference number
ISO 18842:2015(E)
©
ISO 2015

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ISO 18842:2015(E)

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© ISO 2015, Published in Switzerland
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ii © ISO 2015 – All rights reserved

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ISO 18842:2015(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Principle . 1
4 Apparatus . 1
5 Sample handling and preparation . 2
6 Procedure. 2
6.1 Moisture determination . 2
6.2 Untapped bulk density determination . 2
6.3 Tapped bulk density determination . 3
7 Calculation and reporting of results . 3
8 Precision . 3
9 Test report . 4
Bibliography . 7
© ISO 2015 – All rights reserved iii

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ISO 18842:2015(E)

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
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to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 226, Materials for the production of primary aluminium.
iv © ISO 2015 – All rights reserved

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ISO 18842:2015(E)

Introduction
This International Standard is based on the Australian Standard AS 2879.8.
© ISO 2015 – All rights reserved v

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INTERNATIONAL STANDARD ISO 18842:2015(E)
Aluminium oxide primarily used for the production of
aluminium — Method for the determination of tapped and
untapped density
1 Scope
This International Standard describes methods for the determination of tapped and untapped bulk
density of smelter grade aluminium oxide primarily used for the production of aluminium.
Methods using the fall of sample into a receptacle have been found to be sensitive to flow rate variations,
which are caused by physical properties of the aluminium oxide.
This International Standard minimizes flow rate variations.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. 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 4538.2, Guide to the sampling of alumina — Preparation of samples
3 Principle
A test portion of the sample is allowed to fall in a narrow stream from a container onto a small metal
impact plate from which the stream
...