ISO 616:2021

INTERNATIONAL ISO
STANDARD 616
Third edition
2021-10
Coke — Determination of shatter
indices
Coke — Détermination des indices de chute
Reference number
© ISO 2021
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ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus . 1
6 Sampling and size analysis .3
7 Preparation of test portion . 3
8 Procedure .4
8.1 Determination . 4
8.2 Validity of determination . 4
9 Expression of results . 4
10 Precision . 5
10.1 General . 5
10.2 Repeatability limit . 5
10.3 Reproducibility . . 5
11 Test report . 5
iii
Foreword
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This document was prepared by Technical Committee ISO/TC 27, Coal and coke, Subcommittee SC 3,
Coke.
This third edition cancels and replaces the second edition (ISO 616:1995), which has been technically
revised.
The main changes are as follows:
— general and technical revision;
— inclusion of references to ISO 13909-6 and ISO 18283 in Clause 6;
— provision of an example of an apparatus and a modernized mechanism that can raise the sample box
to the standard height is permitted.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
Introduction
The shatter index of coke is the percentage of test sample (initially plus 63 mm) that remains on a test
sieve of stated size of openings after the sample has been subjected to a specified dropping test.
The shatter index of coke can be determined for one test sieve or for each of a number of test sieves of
different sizes of holes (e.g. 80 mm and 40 mm). The higher the shatter index, the greater the resistance
of the coke to breakage into pieces which are smaller than the stated size.
The mean size of the coke before and after the shatter test may also be determined to give additional
information about the strength of the coke.
v
INTERNATIONAL STANDARD ISO 616:2021(E)
Coke — Determination of shatter indices
1 Scope
This document specifies a method for determining the strength of coke by the shatter test.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 579, Coke — Determination of total moisture
ISO 728, Coke — Size analysis by sieving
ISO 3310-2, Test sieves — Technical requirements and testing — Part 2: Test sieves of perforated metal
plate
ISO 13909-6, Hard coal and coke — Mechanical sampling — Part 6: Coke — Preparation of test samples
ISO 18283, Hard coal and coke — Manual sampling
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
shatter index
percentage of a specially prepared sample of coke remaining on a test sieve of stated size of openings
after the sample has been subjected to
...