ISO 4700:1983
(Main)Iron ore pellets — Determination of crushing strength
Iron ore pellets — Determination of crushing strength
Boulettes de minerais de fer — Détermination de la résistance à l'écrasement
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International Standard 4700
INTERNATIONAL ORGANIZATION FOR STANDAAOIZATION.ME~YHA~~HAR OPrAHHJAUHll Il0 CTAHLIAPTH3AUnH.ORGANlSATlON INTERNATIONALE DE NORMALISATION
0. Iron ore pellets - Determination of crushing strength
Boulettes de minerais de fer - Détermination de la résistance à I'écrasement
First edition - 1983-09-15
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W UDC 5ti3.31-492.3 : 620.173 Ref. NO. IS0 47OO-I983 (E)
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f Descriptors : iron ores, tests, determination, crushing strength.
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Price based on 2 pages
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Foreword
IS0 (the International Organization for Standardization) is a worldwide federation of
national standards bodies (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 authorized 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 IS0 Council.
International Standard IS0 4700 was developed by Technical Committee ISO/TC 102,
Iron ores, and was circulated to the member bodies in April 1982.
It has been approved by the member bodies of the following countries :
Australia
India Spain
Austria
Italy Sweden
Canada Japan United Kingdom
China
Korea, Dem. P. Rep. of USA
Czechoslovakia Korea, Rep. of USSR
Egypt, Arab Rep. of Poland Venezuela
Germany, F. R. Romania
France South Africa, Rep. of
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The member body of the following country expressed disapproval of the document on
technical grounds :
Netherlands
O International Organization for Standardization, 1983 0
Printed in Switzerland
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INTERNATIONAL STANDARD IS0 4700-1983 (E)
Iron ore pellets - Determination of crushing strength
5.1.2 The compressive platens shall be flat and shall be in-
1 Scope and field of application
stalled in mutually parallel planes; the portion of the surface
This International Standard specifies a method for the deter- of platens that will be in contact with the sample shall be made
mination of the crushing strength of fired iron ore pellets. of surface-hardened steel.
This method is not applicable to cylindrical agglomerates, bri-
5.1.3 A device capable of setting the speed of the com-
quettes, and reduced iron ore pellets.
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pressive platen at 10 to 20 mm/min over the entire test period
shall be used.
2 References
NOTE - If the platen speed is not constant during the test-cycle,
results may differ depending upon the test machine used. More
IS0 3081, Iron ores - Increment sampling - Manual
uniform results may be obtained using a test machine that applies a
1)
method.
constant load increase.
IS0 3003, Iron ores - Preparation of samples - Manual
method.2)
5.2 Indicating unit
3 Definition
5.2.1 Transmission system of load
For the purpose of this International Standard, the following
5.2.1.1 The means for transmission of the applied load to the
definition applies :
indicating unit shall be either a load cell or a lever.
crushing strength : The applied maximum compressive load
at which an iron ore pellet is broken completely, and which
5.2.1.2 The capacity of the load cell shall be at least 10 kN.
is expressed as the mean value of all measurements of test
sample.
5.2.2 Load indicator or recorder
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4 Principle
5.2.2.1 The means for indicating the applied load shall be
Application of a compressive load to a single
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