ISO 10753:1994
(Main)Coal preparation plant — Assessment of the liability to breakdown in water of materials associated with coal seams
Coal preparation plant — Assessment of the liability to breakdown in water of materials associated with coal seams
The principle of the method specified is degrading a test portion of shale in the size range 5,6 mm to 2,8 mm, by controlled agitation in water, determining the proportion of degraded material passing through a 500 µm sieve, and determining the proportion of degraded material of nominal top size less than 10 µm by sedimentation.
Ateliers de préparation du charbon — Évaluation de la fiabilité de la fragmentation dans l'eau de matériaux associés aux gisements de charbon
Obrat za pripravo premoga - Ocena nagnjenosti razčlembe plasti premoga v spoju z vodno zmesjo
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INTERNATIONAL
ISO
STANDARD
10753
First edition
1994-02-01
Coal preparation plant - Assessment of
the liability to breakdown in water of
materials associated with coal seams
Ateliers de prbparation du charbon - Evaluation de Ia fiabilite de Ia
fragmen ta tion dans I ’eau de ma tkiaux associ& aux gisements de charbon
Reference number
ISO 10753: 1994(E)
---------------------- Page: 1 ----------------------
ISO 10753:1994(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 through ISO
technical committees. Esch 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
(1 EC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting
a vote.
International Standard ISO 10753 was prepared by Technical Committee
lSO/TC 27, Solid mineral fuels, Subcommittee SC 1, Coal preparation.
Terminology and Performance.
Ann ex A forms an in tegral patt of this International Standard. Annex B is
tor I nformation only.
0 ISO 1994
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronie or mechanical, including photocopying and
microfilm, without Permission in writing from the publisher.
International Organization for Standardization
Case Postale 56 0 CH-l 211 Geneve 20 l Switzerland
Printed in Switzerland
ii
---------------------- Page: 2 ----------------------
0 ISO
ISO 10753:1994(E)
Introduction
In this International Standard, the materials associated with coal seams
are collectively referred to as “shale ”, although they may contain a variety
of rocks and minerals. This International Standard describes a method of
assessing the liability of these materials to breakdown on agitation with
water. Future activity on this subject could involve a method for simulating
the breakdown that is likely to occur, in practice, in different types of coal
preparation plants, to generate samples for further testing.
The liability of the shale to breakdown is measured by the proportion of
the degraded material passing through a test sieve having a nominal size
of openings of 500 Fm.
The method described in this International Standard also enables the liab-
ility of the shale to form slimes to be assessed, by determining the pro-
Portion that is below a nominal particle size of 10 Pm, using a simplified
Sedimentation technique. This technique is based on the assumption that,
in the size range being examined, all the particles are spherical, have a
relative density of 2,5, and fall freely through the suspending liquid ac-
cording to Stokes ’s Law. These conditions are not entirely fulfilled in
practice and the particle size is, therefore, referred to as a nominal value.
The extent of breakdown, as measured by this method, will be affected
by whether the shale exhibits any self-flocculation. In the described test,
distilled water (or the equivalent) is used to avoid possible flocculation of
the shale by any soluble salts in the water. The test may be adapted to
assess the relative tendencies of shales to break down in a particular plant,
by using the same water as is used in that plant. However, it is ,empha-
sized that the results of such tests, using plant water, have to be treated
with caution because the extent of breakdown that will occur in practice
is influenced by the interaction of all the components present during the
washing process, including, for example, any accumulation of soluble salts
in the circuit, and by other factors, such as the residente time in the plant.
The relationship between the proportion of degraded material passing a
500 Pm test sieve and the proportion of slimes provides useful information
on the Character of the breakdown, and is therefore included in the results
that are reported.
The amount of breakdown occurring in practice and in the test will be af-
fected by the history of the Sample. For this reason, the Sample is placed
in a sealed Container as soon as is practicable after being taken.
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This page intentionally left blank
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INTERNATIONAL STANDARD 0 ISO ISO 10753:1994(E)
Coal preparation plant - Assessment of the liability
to breakdown in water of materials associated with
coal seams
5 Apparatus
1 Scope
This International Standard specifies a method for as-
sessing the liability of materials associated with coal
seams to breakdown on agitation with water.
5.1 Rigid cylindrical jar, of non-corrodible material
and of capacity 1,O litre + 0,l litre, with an internal
2 Normative reference
height of approximately 170 mm (internal diameter
approximately 85 mm) and a heightldiameter ratio
The following Standard contains provisions which,
2,0 + 0,l.
-
through reference in this text, constitute provisions
of this International Standard. At the time of publi-
The jar shall have a hard lid which tan be secured to
cation, the edition indicated was valid. All Standards
form a watertight Seal.
are subject to revision, and Parties to agreements
based on this International Standard are encouraged
to investigate the possibility of applying the most re-
cent edition of the Standard indicated below. Mem-
bers of IEC and ISO maintain registers of currently
5.2 Rotation machine, capable of rotating the jar
valid International Standards.
about a transverse axis at a rotational frequency of
40 min-’ + 1 min-’ (Speed of 40 r/min & 1 r/min).
-
ISO 331 O-l : 1990, Test sieves - Technical require-
men ts and testing - Part 7: Test sieves of metal
A typical assembly is shown in figure 1.
wire clo th.
NOTE 1 A suitable drive tan be provided by a 0,l kW
Single-Phase motor running at 1 500 r/min, geared down to
3 Principle
40 r/min.
Degradation of a test Portion of shale in the size range
5,6 mm to 2,8 mm, by controlled agitation in water.
Determination of the proportion of degraded material
passing through a 500 Pm sieve, and determination
5.3 Test sieve, having nominal size of openings
of the proportion of degraded material of nominal top
500 Pm, complying with ISO 3310-1.
size less than 10 Pm by Sedimentation.
NOTE 2 This sieve is liable to suffer minor distortion
4 Reagent
when heated to 105 “C (see 7.5), and should therefore be
reserved exclusively for use in this test. Furthermore, it is
During the test, use only distilled water or water of important to ensure that the sieve is constructed of ma-
terials that are stable at the temperature of drying.
equivalent purity.
1
---------------------- Page: 5 ----------------------
ISO 10753:1994(E)
Electric motor
jar
\--Litre jar
-
in water
Figure 1 Typical apparatus for the determination of breakdown characteristics
5.4 Funnel, into which the 500 Pm test sieve (5.3) apparatus shall be protected from all sources of vi-
bration during the test.
will fit.
5.5 Heat-resistant tray, of non-corrodible material,
5.10 Suction device, capable of applying a steady,
large enough to accommodate the 500 Pm test sieve.
controlled suction to the Sedimentation pipette (5.9).
NOTE 3 An aspirator is preferred for this purpose.
5.6 Container, of capacity approximately 100 ml,
fitted with a cover.
5.11 Evaporating dish, of nicke1 or stainless steel,
having a diameter of 50 mm.
5.7 Two test sieves, having nominal sizes of
openings 5,6 mm and 2,8 mm, complying with
ISO 331 o-1.
Flask, of capacity at least 2 litres.
5.12
5.8 Two measuring cylinders, of capacity 1 litre
5.13 Thermostatically-controlled bath, capable of
each, fitted with Stoppers.
being maintained at approximately ambient tempera-
ture, to within + 0,2 “C, and of suitable dimensions
to contain the- Sedimentation apparatus (5.9) a
5.9 Modified Andreasen Sedimentation appar-
measuring cylinder (5.8) and the flask (5.12).
atus, comprising (see figure 2) a measuring cylinder
(A), having a pipette (B) connected to a 10 ml reser-
The bath shall operate without causing significant vi-
voir (C) via a three-way stopcock (D). The neck of the
bration or disturbance of the measuring cylinder and
flask is fitted with a ground-glass stopper (E) which
its contents, when placed in the bath.
has a small opening (F) to allow air to enter the flask
when a Sample is withdrawn, by applying suction at
If a thermostatically controlled bath is not avail-
NOTE 4
Point G; an outlet (H) allows the Sample to be run off.
able, a large Container filled with water that has been al-
The Andreasen Sedimentation apparatus is modified
lowed to attain room temperature may be used instead.
by reducing the length of stem of the pipette, so that
the Sample is withdrawn at the 100 mm mark. The
2
---------------------- Page: 6 ----------------------
5.17 Wash bettle, of capacity at least 400 ml, fitted
with a fine spray-jet outlet.
5.18 Desiccator.
5.19 Vibration-free bench.
D
H
/
6 Sampling and preparation of test
Sample
F
If sufficient material is available, take a representative
Sample containing a minimum of 1 kg in the 5,6 mm
to 2,8 mm size fraction. If there is insufficient material
to provide the required amount in this size fraction,
A
crush all the larger shale and add the 5,6 mm to
2,8 mm size fraction of the crushed product to that
size fraction in the original material. If neither of these
measures provides sufficient material, a size fraction
of 5,6 mm to 1,0 mm shall be used instead. Full de-
tails of the Sample taken shall be included in the test
report (see clause 10).
NOTES
5 It may be useful to prepare and test separate represen-
tative samples from the floor, roof and dirt bands for each
seam.
6 If the test Sample is obtained from raw coal by means
of float and sink Separation, this may affect the results of
the test.
KW
Remove the dust from the test Sample by gentle
A Graduated cylindrical flask
blowing with air and store the test Sample, until re-
B Pipette
quired for testing, in a secure, sealed Container.
C 10 ml Reservoir
D Three-way stopcock
7 Procedure
E Ground-glass stopper
F Small opening in stopper (to allow air to enter)
7.1 Determination of initial moisture content
G Suction application Point
Determine the moisture content of the shale “as re-
H Outlet
ceived” by weighing a 10 g Portion, to an accuracy
of + 0,000 1 g, drying in the oven (5.14) for 2 h at
Figure 2 - Modified Andreasen Sedimentation
105 “C to 110 “C and then reweighing.
apparatus
7.2 Preparation of test Portion
5.14 Drying oven, weil ventilated and capable of
Dry for 2 h in the oven (5.14), at 105 “C to 110 ‘C,
being maintained in the temperature range 105 “C to
enough of the test Sample to provide a mass of
110 “C. 120 g, when dried, and place it in a sealed Container.
5.15 Stop clock.
7.3 Determination of residual moisture
content
5.16 Analytical balancels), capable of weighing up
Determine the residual moisture in the test Portion
to 20 g to the nearest 0,000 1 g and up to 200 g to
by taking 10 g of the dried test Sample (see 7.2),
the nearest 0,Ol g.
3
---------------------- Page: 7 ----------------------
ISO 10753:1994(E) 0 ISO
weighed to an accuracy of & 0,000 1 g, drying in the
7.7 Preparation of water and apparatus for
oven (5.14) to constant mass at 105 “C to 110 “C and
Sedimentation
then reweighing.
Fill the flask (5.12) with water (clause 4) and place it,
together with the Sedimentation apparatus (5.9) in
7.4 Agitation of test Portion
the thermostatically-controlled bath (5.13), main-
tained, to within -& 0,2 “C, at a temperature close to
Weigh, to an accuracy of + 0,Ol g, 100 g of the dried
ambient temperature. Allow at least 1 h to resch
test Sample (7.2), place in-the cylindrical jar (5.1) and
temperature equilibrium before proceeding with the
add 500 ml of water (clause 4). Seal the jar securely,
procedure described in 7.8. Use this water whenever
place it in the rotation machine (5.2) and rotate it
water is required for subsequent Steps in the pro-
about a transverse axis (i.e. “end over end ”) at a ro-
cedure.
tatio
...
SLOVENSKI STANDARD
SIST ISO 10753:1998
01-november-1998
2EUDW]DSULSUDYRSUHPRJD2FHQDQDJQMHQRVWLUD]þOHPEHSODVWLSUHPRJDYVSRMX
]YRGQR]PHVMR
Coal preparation plant -- Assessment of the liability to breakdown in water of materials
associated with coal seams
Ateliers de préparation du charbon -- Évaluation de la fiabilité de la fragmentation dans
l'eau de matériaux associés aux gisements de charbon
Ta slovenski standard je istoveten z: ISO 10753:1994
ICS:
73.120 Oprema za predelavo rudnin Equipment for processing of
minerals
SIST ISO 10753:1998 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
SIST ISO 10753:1998
---------------------- Page: 2 ----------------------
SIST ISO 10753:1998
INTERNATIONAL
ISO
STANDARD
10753
First edition
1994-02-01
Coal preparation plant - Assessment of
the liability to breakdown in water of
materials associated with coal seams
Ateliers de prbparation du charbon - Evaluation de Ia fiabilite de Ia
fragmen ta tion dans I ’eau de ma tkiaux associ& aux gisements de charbon
Reference number
ISO 10753: 1994(E)
---------------------- Page: 3 ----------------------
SIST ISO 10753:1998
ISO 10753:1994(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 through ISO
technical committees. Esch 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
(1 EC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting
a vote.
International Standard ISO 10753 was prepared by Technical Committee
lSO/TC 27, Solid mineral fuels, Subcommittee SC 1, Coal preparation.
Terminology and Performance.
Ann ex A forms an in tegral patt of this International Standard. Annex B is
tor I nformation only.
0 ISO 1994
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronie or mechanical, including photocopying and
microfilm, without Permission in writing from the publisher.
International Organization for Standardization
Case Postale 56 0 CH-l 211 Geneve 20 l Switzerland
Printed in Switzerland
ii
---------------------- Page: 4 ----------------------
SIST ISO 10753:1998
0 ISO
ISO 10753:1994(E)
Introduction
In this International Standard, the materials associated with coal seams
are collectively referred to as “shale ”, although they may contain a variety
of rocks and minerals. This International Standard describes a method of
assessing the liability of these materials to breakdown on agitation with
water. Future activity on this subject could involve a method for simulating
the breakdown that is likely to occur, in practice, in different types of coal
preparation plants, to generate samples for further testing.
The liability of the shale to breakdown is measured by the proportion of
the degraded material passing through a test sieve having a nominal size
of openings of 500 Fm.
The method described in this International Standard also enables the liab-
ility of the shale to form slimes to be assessed, by determining the pro-
Portion that is below a nominal particle size of 10 Pm, using a simplified
Sedimentation technique. This technique is based on the assumption that,
in the size range being examined, all the particles are spherical, have a
relative density of 2,5, and fall freely through the suspending liquid ac-
cording to Stokes ’s Law. These conditions are not entirely fulfilled in
practice and the particle size is, therefore, referred to as a nominal value.
The extent of breakdown, as measured by this method, will be affected
by whether the shale exhibits any self-flocculation. In the described test,
distilled water (or the equivalent) is used to avoid possible flocculation of
the shale by any soluble salts in the water. The test may be adapted to
assess the relative tendencies of shales to break down in a particular plant,
by using the same water as is used in that plant. However, it is ,empha-
sized that the results of such tests, using plant water, have to be treated
with caution because the extent of breakdown that will occur in practice
is influenced by the interaction of all the components present during the
washing process, including, for example, any accumulation of soluble salts
in the circuit, and by other factors, such as the residente time in the plant.
The relationship between the proportion of degraded material passing a
500 Pm test sieve and the proportion of slimes provides useful information
on the Character of the breakdown, and is therefore included in the results
that are reported.
The amount of breakdown occurring in practice and in the test will be af-
fected by the history of the Sample. For this reason, the Sample is placed
in a sealed Container as soon as is practicable after being taken.
---------------------- Page: 5 ----------------------
SIST ISO 10753:1998
This page intentionally left blank
---------------------- Page: 6 ----------------------
SIST ISO 10753:1998
INTERNATIONAL STANDARD 0 ISO ISO 10753:1994(E)
Coal preparation plant - Assessment of the liability
to breakdown in water of materials associated with
coal seams
5 Apparatus
1 Scope
This International Standard specifies a method for as-
sessing the liability of materials associated with coal
seams to breakdown on agitation with water.
5.1 Rigid cylindrical jar, of non-corrodible material
and of capacity 1,O litre + 0,l litre, with an internal
2 Normative reference
height of approximately 170 mm (internal diameter
approximately 85 mm) and a heightldiameter ratio
The following Standard contains provisions which,
2,0 + 0,l.
-
through reference in this text, constitute provisions
of this International Standard. At the time of publi-
The jar shall have a hard lid which tan be secured to
cation, the edition indicated was valid. All Standards
form a watertight Seal.
are subject to revision, and Parties to agreements
based on this International Standard are encouraged
to investigate the possibility of applying the most re-
cent edition of the Standard indicated below. Mem-
bers of IEC and ISO maintain registers of currently
5.2 Rotation machine, capable of rotating the jar
valid International Standards.
about a transverse axis at a rotational frequency of
40 min-’ + 1 min-’ (Speed of 40 r/min & 1 r/min).
-
ISO 331 O-l : 1990, Test sieves - Technical require-
men ts and testing - Part 7: Test sieves of metal
A typical assembly is shown in figure 1.
wire clo th.
NOTE 1 A suitable drive tan be provided by a 0,l kW
Single-Phase motor running at 1 500 r/min, geared down to
3 Principle
40 r/min.
Degradation of a test Portion of shale in the size range
5,6 mm to 2,8 mm, by controlled agitation in water.
Determination of the proportion of degraded material
passing through a 500 Pm sieve, and determination
5.3 Test sieve, having nominal size of openings
of the proportion of degraded material of nominal top
500 Pm, complying with ISO 3310-1.
size less than 10 Pm by Sedimentation.
NOTE 2 This sieve is liable to suffer minor distortion
4 Reagent
when heated to 105 “C (see 7.5), and should therefore be
reserved exclusively for use in this test. Furthermore, it is
During the test, use only distilled water or water of important to ensure that the sieve is constructed of ma-
terials that are stable at the temperature of drying.
equivalent purity.
1
---------------------- Page: 7 ----------------------
SIST ISO 10753:1998
ISO 10753:1994(E)
Electric motor
jar
\--Litre jar
-
in water
Figure 1 Typical apparatus for the determination of breakdown characteristics
5.4 Funnel, into which the 500 Pm test sieve (5.3) apparatus shall be protected from all sources of vi-
bration during the test.
will fit.
5.5 Heat-resistant tray, of non-corrodible material,
5.10 Suction device, capable of applying a steady,
large enough to accommodate the 500 Pm test sieve.
controlled suction to the Sedimentation pipette (5.9).
NOTE 3 An aspirator is preferred for this purpose.
5.6 Container, of capacity approximately 100 ml,
fitted with a cover.
5.11 Evaporating dish, of nicke1 or stainless steel,
having a diameter of 50 mm.
5.7 Two test sieves, having nominal sizes of
openings 5,6 mm and 2,8 mm, complying with
ISO 331 o-1.
Flask, of capacity at least 2 litres.
5.12
5.8 Two measuring cylinders, of capacity 1 litre
5.13 Thermostatically-controlled bath, capable of
each, fitted with Stoppers.
being maintained at approximately ambient tempera-
ture, to within + 0,2 “C, and of suitable dimensions
to contain the- Sedimentation apparatus (5.9) a
5.9 Modified Andreasen Sedimentation appar-
measuring cylinder (5.8) and the flask (5.12).
atus, comprising (see figure 2) a measuring cylinder
(A), having a pipette (B) connected to a 10 ml reser-
The bath shall operate without causing significant vi-
voir (C) via a three-way stopcock (D). The neck of the
bration or disturbance of the measuring cylinder and
flask is fitted with a ground-glass stopper (E) which
its contents, when placed in the bath.
has a small opening (F) to allow air to enter the flask
when a Sample is withdrawn, by applying suction at
If a thermostatically controlled bath is not avail-
NOTE 4
Point G; an outlet (H) allows the Sample to be run off.
able, a large Container filled with water that has been al-
The Andreasen Sedimentation apparatus is modified
lowed to attain room temperature may be used instead.
by reducing the length of stem of the pipette, so that
the Sample is withdrawn at the 100 mm mark. The
2
---------------------- Page: 8 ----------------------
SIST ISO 10753:1998
5.17 Wash bettle, of capacity at least 400 ml, fitted
with a fine spray-jet outlet.
5.18 Desiccator.
5.19 Vibration-free bench.
D
H
/
6 Sampling and preparation of test
Sample
F
If sufficient material is available, take a representative
Sample containing a minimum of 1 kg in the 5,6 mm
to 2,8 mm size fraction. If there is insufficient material
to provide the required amount in this size fraction,
A
crush all the larger shale and add the 5,6 mm to
2,8 mm size fraction of the crushed product to that
size fraction in the original material. If neither of these
measures provides sufficient material, a size fraction
of 5,6 mm to 1,0 mm shall be used instead. Full de-
tails of the Sample taken shall be included in the test
report (see clause 10).
NOTES
5 It may be useful to prepare and test separate represen-
tative samples from the floor, roof and dirt bands for each
seam.
6 If the test Sample is obtained from raw coal by means
of float and sink Separation, this may affect the results of
the test.
KW
Remove the dust from the test Sample by gentle
A Graduated cylindrical flask
blowing with air and store the test Sample, until re-
B Pipette
quired for testing, in a secure, sealed Container.
C 10 ml Reservoir
D Three-way stopcock
7 Procedure
E Ground-glass stopper
F Small opening in stopper (to allow air to enter)
7.1 Determination of initial moisture content
G Suction application Point
Determine the moisture content of the shale “as re-
H Outlet
ceived” by weighing a 10 g Portion, to an accuracy
of + 0,000 1 g, drying in the oven (5.14) for 2 h at
Figure 2 - Modified Andreasen Sedimentation
105 “C to 110 “C and then reweighing.
apparatus
7.2 Preparation of test Portion
5.14 Drying oven, weil ventilated and capable of
Dry for 2 h in the oven (5.14), at 105 “C to 110 ‘C,
being maintained in the temperature range 105 “C to
enough of the test Sample to provide a mass of
110 “C. 120 g, when dried, and place it in a sealed Container.
5.15 Stop clock.
7.3 Determination of residual moisture
content
5.16 Analytical balancels), capable of weighing up
Determine the residual moisture in the test Portion
to 20 g to the nearest 0,000 1 g and up to 200 g to
by taking 10 g of the dried test Sample (see 7.2),
the nearest 0,Ol g.
3
---------------------- Page: 9 ----------------------
SIST ISO 10753:1998
ISO 10753:1994(E) 0 ISO
weighed to an accuracy of & 0,000 1 g, drying in the
7.7 Preparation of water and apparatus for
oven (5.14) to constant mass at 105 “C to 110 “C and
Sedimentation
then reweighing.
Fill the flask (5.12) with water (clause 4) and place it,
together with the Sedimentation apparat
...
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