ISO/FDIS 10752
(Main)Coal sizing equipment — Performance evaluation
Coal sizing equipment — Performance evaluation
This document describes the principles and methods for the expression of results of performance tests on sizing equipment used in coal preparation, and includes methods for the evaluation of performance parameters. Performance test procedures and size measurement techniques are recommended. This document applies to all types of sizing equipment, categorized as follows: — screens; — classifiers; — others. The procedure described in this document applies to two-product separations. Performance assessment of multiproduct separations can be achieved by consideration of a series of two-product separations.
Équipement pour la granulométrie du charbon — Évaluation de l'aptitude à l'emploi
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FINAL DRAFT
International
Standard
ISO/TC 27/SC 1
Coal sizing equipment —
Secretariat: SA
Performance evaluation
Voting begins on:
Équipement pour la granulométrie du charbon — Évaluation de 2025-08-28
l'aptitude à l'emploi
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2025-10-23
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MADE IN NATIONAL REGULATIONS.
Reference number
FINAL DRAFT
International
Standard
ISO/TC 27/SC 1
Coal sizing equipment —
Secretariat: SA
Performance evaluation
Voting begins on:
Équipement pour la granulométrie du charbon — Évaluation de
l'aptitude à l'emploi
Voting terminates on:
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
© ISO 2025
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland Reference number
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
3.1 General terms .1
3.2 Performance parameters terms .2
4 Performance criteria . 2
5 Performance parameters . 3
6 Performance test procedures . 3
7 Analytical procedures . . 4
8 Evaluation and presentation of performance characteristics . 5
8.1 General .5
8.2 Basic data .5
8.3 Reconstituted feed size distribution .5
8.4 Partition curve .6
8.5 Partition size .6
8.6 Sharpness of separation .6
8.7 Misplaced material curves .6
8.8 Misplaced material .7
8.9 Equal errors size .7
8.10 Theoretical yield .7
8.11 Material placement efficiency .7
8.12 Near-size material .8
8.13 Test and equipment data .8
9 Tabular and graphical presentation . 8
Annex A (informative) Calculation of the yield of each product of a size separation from size
analyses of feed and product materials .16
Annex B (informative) Worked example — Vibrating screen . 19
Annex C (informative) Worked example — Cyclone .27
Annex D (informative) Worked example — Deduster .34
Bibliography . 41
iii
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 through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established 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. ISO collaborates closely
with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 27, Coal and Coke, Subcommittee SC 1, Coal
preparation: Terminology and performance.
This third edition cancels and replaces the second edition (ISO 10752:2019), which has been technically
revised.
The main changes are as follows:
— Clause 2 normative references updated;
— data sheets converted to tables.
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
A standard expression of performance is used to define the accuracy of separation of a particular item, to
assist in the comparison of the performance of different items of coal sizing equipment and in the prediction
of separation results.
v
FINAL DRAFT International Standard ISO/FDIS 10752:2025(en)
Coal sizing equipment — Performance evaluation
1 Scope
This document describes the principles and methods for the expression of results of performance tests
on sizing equipment used in coal preparation and includes methods for the evaluation of performance
parameters. Performance test procedures and size measurement techniques are recommended.
This document applies to all types of sizing equipment, categorized as follows:
a) screens;
b) classifiers;
c) others.
The procedure described in this document applies to two-product separations. Performance assessment of
multiproduct separations can be achieved by consideration of a series of two-product separations.
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 1213-1, Coal and coke — Vocabulary — Part 1: Terms relating to coal preparation
ISO 13909-2, Coal and coke — Mechanical sampling — Part 2: Sampling of coal from moving streams
ISO 13909-4, Coal and coke — Mechanical sampling — Part 4: Preparation of test samples of coal
ISO 18283, Coal and coke — Manual sampling
ISO 20904, Hard coal — Sampling of slurries
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 1213-1 and the following 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 General terms
3.1.1
actual feed
F
material fed to the sizing equipment during the test period and including any recirculated material
3.1.2
coarser material
material that is coarser than the reference size
3.1.3
finer material
material that is finer than the reference size
3.1.4
product
material discharged from the sizing equipment prior to any further treatment or recirculation
3.1.5
coarser product
c
product of size separation that contains a greater proportion of coarser material than the feed
3.1.6
finer product
f
product of size separation that contains a greater proportion of finer material than the feed
3.1.7
sharpness of separation
E
p
assessment of the deviation from a perfect separation
Note 1 to entry: Usually expressed in terms of mean probabl
...
ISO/TC 27/SC 1
Secretariat: SA
Date: 2025-04-11
Coal sizing equipment — Performance evaluation
Équipement pour la granulométrie du charbon — Évaluation de l'aptitude à l'emploi
FDIS stage
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication
may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying,
or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO
at the address below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
Fax: +41 22 749 09 47
EmailE-mail: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
Contents
Foreword . iv
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Performance criteria . 3
5 Performance parameters . 3
6 Performance test procedures . 4
7 Analytical procedures . 5
8 Evaluation and presentation of performance characteristics . 6
9 Tabular and graphical presentation . 10
Annex A (informative) Calculation of the yield of each product of a size separation from size
analyses of feed and product materials . 22
Annex B (informative) Worked example — Vibrating screen . 25
Annex C (informative) Worked example — Cyclone . 36
Annex D (informative) Worked example — Deduster . 48
Bibliography . 59
Bibliography . 4
iii
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 through
ISO technical committees. Each member body interested in a subject for which a technical committee has been
established 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. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types of
ISO document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent rights
in respect thereof. As of the date of publication of this document, ISO had not received notice of (a) patent(s)
which may be required to implement this document. However, implementers are cautioned that this may not
represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 27, Coal and Coke, Subcommittee SC 1, Coal
preparation: Terminology and performance.
This third edition cancels and replaces the second edition (ISO 10752:2019), which has been technically
revised.
The main changes are as follows:
— Modification ISO 1213-1 Standard’s name from Solid Mineral Fuels to “Coal and Coke”
Nominating actual ISO 13909 parts 2 and 4 being the parts relevant to this Standard
Addition of ISO 20904 — Coal — Sampling of slurries which is relevant to this Standard and important
in sampling many streams in coal preparation plants.
Changing all Data Sheets to Tables at request of ISO editor.
— Clause 2 normative references updated;
— data sheets converted to tables.
iv
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.
v
Introduction
A standard expression of performance is requiredused to define the accuracy of separation of a particular
item, to assist in the comparison of the performance of different items of coal sizing equipment and in the
prediction of separation results.
vi
Coal sizing equipment — Performance evaluation
1 Scope
This document describes the principles and methods for the expression of results of performance tests on
sizing equipment used in coal preparation and includes methods for the evaluation of performance
parameters. Performance test procedures and size measurement techniques are recommended.
This document applies to all types of sizing equipment, categorized as follows:
a) a) screens;
b) b) classifiers;
c) c) others.
The procedure described in this document applies to two-product separations. Performance assessment of
multiproduct separations can be achieved by consideration of a series of two-product separations.
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 589, Hard coal — Determination of total moisture
ISO 1170, Coal and coke — Calculation of analyses to different bases
ISO 1213--1, Coal and coke — Vocabulary — Part 1: Terms relating to coal preparation
ISO 1953, Coal — Size analysis by sieving
ISO 13909-2, Coal and coke — Mechanical sampling — Part 2: Sampling of coal from moving streams
ISO 13909-4, Coal and coke — Mechanical sampling — Part 4: Preparation of test samples of coal
ISO 18283, Coal and coke — Manual sampling
ISO 20904, CoalHard coal — Sampling of slurries
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 1213--1 and the following 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 General terms
3.1.1 3.1.1
actual feed
F
material fed to the sizing equipment during the test period and including any recirculated material
3.1.2 3.1.2
coarser material
material that is coarser than the reference size
3.1.3 3.1.3
finer material
material that is finer than the reference size
3.1.4 3.1.4
product
material discharged from the sizing equipment prior to any further treatment or recirculation
3.1.5 3.1.5
coarser product
c
product of size separation that contains a greater proportion of coarser material than the feed
3.1.6 3.1.6
finer product
f
product of size separation that contains a greater proportion of finer material than the feed
3.1.7 3.1.7
sharpness of separation
E
p
assessment of the deviation from a perfect separation
Note 1 to entry: Usually expressed in terms of mean probable error. (Often (often identified in technical reports as E .
pm )
3.2 Performance parameters terms
3.2.1 3.2.1
theoretical yield
maximum yield of a product at a reference size, as determined from the size distribution curve for the
reconstituted feed
3.2.2 3.2.2
coarser material placement efficiency
E
c
percentage of coarser material in the reconstituted feed that reports to the coarser product
3.2.3 3.2.3
finer material placement efficiency
E
f
percentage of finer material in the reconstituted feed that reports to the finer product
3.2.4 3.2.4
overall separation index
sum of the coarser material placement efficiency and the finer material placement efficiency minus 100
4 Performance criteria
The following criteria should be determined where applicable:
a) a) feed rate;
b) b) reference size of separation;
c) c) sharpness of separation;
d) d) misplaced material;
e) e) material placement efficiencies;
f) f) the degree of difficulty of separation;
g) g) material characteristics.
The above criteria willcan be influenced by test conditions which should therefore be fully reported.
It is essential thatThe prediction of separation results considersshould consider the influence of test
conditions.
It is essentialimportant also that test conditions are made compatible to ensure valid comparisons.
Conditions should be kept uniform during a test.
5 Performance parameters
For the standard expression of performance of a separation, the criteria given in Clause 4Clause 4 should be
determined by the following parameters:
a) a) the feed rate, expressed on mass and/or volume bases, or both;
b) b) the reference size, preferably expressed as both partition size and equal errors size. It is
recognized that partition size is not always obtainable from the results of a size separation and that an
alternative reference size therefore must be employed. To allow comprehensive comparison of
performance, it is recommended that parameters based on equal errors size as the reference be included,
in addition to those based on partition size;
c) c) the sharpness of separation, expressed in terms of probable error;
d) d) the distribution of misplaced material in each product, presented graphically with respect to
size, and the values of misplaced material in each product on both feed and product bases, are each
determined at the reference size of separation;
e) e) the material placement efficiencies expressed as:
1) 1) coarser material placement efficiency, E ;
c
2) 2) finer material placement efficiency, E ;
f
3) 3) overall separation index derived from 1) and 2).
f) f) the degree of difficulty of separation, expressed in terms of near size material;
g) g) other relevant characteristics of the feed material.
6 Performance test procedures
The equipment to be tested, the actual feed composition, and the means of handling the feed and products
vary widely. A single standard procedure is not applicable. The following general recommendationsprovisions
are madeprovided:
a) the average feed rate and product flow rates should be determined by the most accurate method possible
in the circumstances;
Typical procedures that may be used are:
i) i. direct assessment of the mass and volume of the whole of the feed or product during the test.
ii) ii. continuous assessment by means of a calibrated belt mass determinator or flowmeter and
integration during the test;
iii) iii. determine the mass of timed increments by weighing taken at regular intervals during the test.
b) b) where possible in Coal Preparation Plantscoal preparation plants, sampling techniques, initial
number of increments and minimum mass of each increment shall be chosen so that all samples taken are
representative. Sampling and preparation of samples, shall be in accordance with ISO 13909-2,
ISO 13909-4, and ISO 18283 for solids and with ISO 20904 for slurries. Some manual sampling of piped
liquids and solids in coal preparation plants can be quite difficult and achieving fully representative
samples may not be easy. If this is suspected, a manual sampling regime may be undertaken following
strict plant safety guidelines. However, samples prod
...
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