SIST ISO 8858-1:1998
(Main)Hard coal -- Froth flotation testing -- Part 1: Laboratory procedure
Hard coal -- Froth flotation testing -- Part 1: Laboratory procedure
Houille -- Essais de flottation -- Partie 1: Méthode de laboratoire
Črni premog - Preskušanje flotiranja - 1. del: Laboratorijski postopek
General Information
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Standards Content (Sample)
INTERNATIONAL
STANDARD
First edi tion
1990-09-0 1
Hard coal - Froth flotation testing -
Part 1:
Laboratory procedure
Houille - Essais de flottation -
Partie 1: Methode de laboratoire
Reference number
ISO 88584 : 1990( E)
---------------------- Page: 1 ----------------------
ISO 88584:1990(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, govern-
mental 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.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an Interna-
tional Standard requires approval by at least 75 % of the member bodies
casting a vote.
International Standard ISO 8858-1 was prepared by Technical Committee
ISO/TC 27, Solid mineral fuels.
ISO 8858 consists of the following Part, under the general title Hard
coal - Roth f7otation festing:
- Part 1: Laborstory procedure
ISO 8858-2 will be published later.
Annex A of this part of ISO 8858 is for information only.
0 ISO 1990
All rights reserved. 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 Organizati on for Standardiz ation
Case Postale 56 l CH-1 1 Geneve 20 l Switzerland
21
Printed in Switzerland
ii
---------------------- Page: 2 ----------------------
ISO 88584:199O(E)
Introductisn
The froth flotation of coal has widespread application for the concen-
tration and Separation sf fine coal particles from mineral matter. The
response of coal to the froth flotation process is initially measured by a
laboratory scale test. Although the principles used for the Iaboratory
tests are generally similar, the precise type of equipment and tech-
niques used vary considerably.
The procedure for the laboratory froth flotation test sets out, in detail,
the type of equipment to be used and the methods to be adopted. The
purpose of this procedure is to provide a Standard method of test by
which a preliminary evaluation of the froth flotation characteristics of a
coal tan be compared. This need is particularly important for explora-
tion Programmes. This part of ISO 8858 also serves as an introduction
for Operators who are not familiar with the techniques (and Problems)
associated with the laboratory froth flotation of coals.
. . .
Ill
---------------------- Page: 3 ----------------------
This page intentionally Jeft blank
---------------------- Page: 4 ----------------------
INTERNATIONAL STANDARD ISO 88584:1990(E)
Hard coal - Froth flotation testing -
Part 1:
Laboratory procedure
ISO 648:1977, Laboratory glassware - One-mark
1 Scope
pipettes.
This part of ISO 8858 sets out a Iaboratory procedure
ISO 1171:1981, Solid mineral fuels - Determination
for the froth flotation testing of fine coal, e.g. coal of
of ash.
particle size less than 0,5 mm. The procedure pro-
vides a means of evaluationg the general flotation
ISO 1213-1:1982, Solid mineral fuels - Vocabulary
characteristics of a coal under a set of specified
Part I: Terms relating 20 coal preparation.
Standard conditions and will not necessarily indicate
the full flotation potential of that coal.
ISO 1953:1972, Hard coals - Size analysis.
The flotation characteristics of coals are sensitive to
ISO 1988: 1975, Hard coal - Sampling.
changes in flotation conditions. These conditions
tan be changed by varying such basic Parameters
as flotation time, reagent and dosage rate. Separate
flotation tests are required to assess the effect of
3 Definitions
varying these Parameters to determine the best
flotation conditions for a particular coal. A method
For the purposes of this part of ISO 8858, the defi-
of evaluating flotation response will be given in a
nitions in ISO 1213-1 apply. The following defmitions
separate Standard.
from ISO 1213-1 are repeated for information only.
3.1 collector; collecting agent: A reagent added to
a pulp to bring about adhesion between solid parti-
cles and air bubbles.
2 Normative references
3.2 flotation concentrate: The clean product recov-
The following Standards contain provisions which,
ered in froth flotation.
through reference in this text, constitute provisions
of this patt of ISO 8858. At the time of publication,
3.3 conditioning: The preparatory Stage in the
the editions indicated were valid. All Standards are
flotation process in which the reagents are brought
subject to revision, and Parties to agreements based
into intimate contact with the solids of the pulp.
on this part of ISO 8858 are encouraged to investi-
gate the possibility of applying the most recent edi-
3.4 frother; frothing agent: A reagent used to con-
tions of the Standards indicated below. Members of
trol the size and stability of the air bubbles in the
IEC and ISO maintain registers of currently valid
flotation process.
International Standards.
3.5 froth flotation: A process for cleaning fine coal
ISO 331:1983, Coal - Determination of moisture in
in which the coal, with the aid of a reagent or rea-
the analysis Sample - Direct gravimetric method.
gents, becomes attached to air bubbles in a liquid
medium and floats as a froth.
ISO 565:1990, Test sieves - Metal wire cloth, perfo-
rated metal plate and electroformed sheet - Nominal
sizes of openings. 3.6 pulp: A mixture of solid particles and water.
---------------------- Page: 5 ----------------------
ISO 88584:1990(E)
3.7 flotation tailings: The reject from froth flotation 6.2 Impeller assembly, of stainless steel and capa-
cells. ble of rotation at frequencies up to 1500 rev/min
(equivalent to a Speed of 5,7 m/s at the peripher-y).
The dimensions of the impeller and diffuser are
4 Prineiple
shown in figures 5 and 6.
The lower face of the impeller shall be positioned
Mixing of a coal Sample with water to form a sus-
no more than 5 mm from the base of the cell.
Pension in the flotation cell. Addition of collector and
frother and introduction of air. Separate recovery sf
NOTE 2 Impellers constructed of other materials may
the concentrate and tailings and determination of
be used, provided that it tan be shown that the charac-
the yield and ash of each.
teristics of flotation for the cell are similar to those ob-
tained when a stainless steel impeller is used. To achieve
NOTE 1 The use of Chemical additives or heat tan affect
this, different impeller rotational frequencies may be used
the flotation characteristics of the coal.
if necessary.
6.3 Constant level control, maintaining the level of
5 Reagents
the pulp in the cell during the flotation test.
During the analysis, use only reagents of recognized
6.4 Scraper, of the design shown in figure4. Its
analytical grade and only distilled water or water of
clearance at the sides of the cell shall be minimal
equivalent purity.
and should not exceed 2 mm. The scraper shall be
of such dimensions that it clears the pulp level (as
5.1 Collector, n-Dodecane.
defmed in 8.4) by not more than 2 mm.
5.2 Frother, Methyl iso-butyl carbinol (MIBC),
6.5 Calibrated micro-Syringe, for the addition of the
(4-Methylpentan-2-01) 0,14 % (V/ V) aqueous sol- collector (5.1).
ution.
6.6 Pipette, of capacity 25 ml, complying with
ISO 648, for the addition of the frother Solution (5.2).
6 Apparatus
6.7 Timing device, accurate to 1 s and capable of
The apparatus shall be a mechanical impeller type
being zeroed and started as required.
flotation machine (see figure 1) with the following
specifications.
6.8 Test sieves, complying with ISO 565, for the
particle size analysis of the feed.
6.1 Flotation cell, manufactured from stainless
steel.
7 Sampling
Figure 2 Shows the dimensions of the flotation cell.
The history and method of preparation of samples
The capacity of the cell with the deflector block and
tan affect considerably the flotation characteristics
impeller in place is approximately 3,5 litres.
of the coal. The origin of the Sample should be re-
lt has been shown that the results obtained from
corded and care should be taken to ensure that
Iaboratory froth flotation tests are very dependent
samples for comparison purposes are prepared in
on the procedure used to remove the concentrate
a similar manner. Since repeat tests are required
from the surface of the pulp. For this reason, a de-
together with sub-sampling for particle size and
flector block manufactured from plastics material
moisture determination, great care should be taken
(see figure 3) is used to guide the concentrate to a
in mixing and subdivision of the original Sample.
rectangular area in front of the impeller housing.
Where applicable, all sampling and subdivision of
The concentrate tan then be removed by means of
samples should be carried out in accordance with
a scraper (see frgure4) which is designed to cover
the procedures specified in ISO 1988.
the full width of the cell to a constant depth.
The quantity of gross Sample required is at least five
In Order to establish the volume of pulp which tan
times the quantity required for a Single flotation test.
be contained in the flotation cell, the deflector block
The latter quantity tan be determined by reference
is fitted into the cell and water is added to the
to 8.3.
flotation cell to about 20 mm to 30 mm below the
Where the Sample for flotation testing is obtained in
required pulp level. The impeller is started (air valve
pulp (or slurry) form, it will be necessary to separate
Off) and additional water is added to the required
mark (see 8.4). The impeller is stopped, the deflector the solids from the water before the procedures laid
down in this patt of ISO 8858 tan be applied. Dewa-
block removed, and the volume of water in the
tering shall be by natura1 settlement followed by
flotation cell is measured.
2
---------------------- Page: 6 ----------------------
ISO 885&1:199O(E)
decantation and filtration. No chemicals or heat shall
9 Procedu
...
SLOVENSKI STANDARD
SIST ISO 8858-1:1998
01-februar-1998
ýUQLSUHPRJ3UHVNXãDQMHIORWLUDQMDGHO /DERUDWRULMVNLSRVWRSHN
Hard coal -- Froth flotation testing -- Part 1: Laboratory procedure
Houille -- Essais de flottation -- Partie 1: Méthode de laboratoire
Ta slovenski standard je istoveten z: ISO 8858-1:1990
ICS:
73.040 Premogi Coals
SIST ISO 8858-1:1998 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
SIST ISO 8858-1:1998
---------------------- Page: 2 ----------------------
SIST ISO 8858-1:1998
INTERNATIONAL
STANDARD
First edi tion
1990-09-0 1
Hard coal - Froth flotation testing -
Part 1:
Laboratory procedure
Houille - Essais de flottation -
Partie 1: Methode de laboratoire
Reference number
ISO 88584 : 1990( E)
---------------------- Page: 3 ----------------------
SIST ISO 8858-1:1998
ISO 88584:1990(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, govern-
mental 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.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an Interna-
tional Standard requires approval by at least 75 % of the member bodies
casting a vote.
International Standard ISO 8858-1 was prepared by Technical Committee
ISO/TC 27, Solid mineral fuels.
ISO 8858 consists of the following Part, under the general title Hard
coal - Roth f7otation festing:
- Part 1: Laborstory procedure
ISO 8858-2 will be published later.
Annex A of this part of ISO 8858 is for information only.
0 ISO 1990
All rights reserved. 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 Organizati on for Standardiz ation
Case Postale 56 l CH-1 1 Geneve 20 l Switzerland
21
Printed in Switzerland
ii
---------------------- Page: 4 ----------------------
SIST ISO 8858-1:1998
ISO 88584:199O(E)
Introductisn
The froth flotation of coal has widespread application for the concen-
tration and Separation sf fine coal particles from mineral matter. The
response of coal to the froth flotation process is initially measured by a
laboratory scale test. Although the principles used for the Iaboratory
tests are generally similar, the precise type of equipment and tech-
niques used vary considerably.
The procedure for the laboratory froth flotation test sets out, in detail,
the type of equipment to be used and the methods to be adopted. The
purpose of this procedure is to provide a Standard method of test by
which a preliminary evaluation of the froth flotation characteristics of a
coal tan be compared. This need is particularly important for explora-
tion Programmes. This part of ISO 8858 also serves as an introduction
for Operators who are not familiar with the techniques (and Problems)
associated with the laboratory froth flotation of coals.
. . .
Ill
---------------------- Page: 5 ----------------------
SIST ISO 8858-1:1998
This page intentionally Jeft blank
---------------------- Page: 6 ----------------------
SIST ISO 8858-1:1998
INTERNATIONAL STANDARD ISO 88584:1990(E)
Hard coal - Froth flotation testing -
Part 1:
Laboratory procedure
ISO 648:1977, Laboratory glassware - One-mark
1 Scope
pipettes.
This part of ISO 8858 sets out a Iaboratory procedure
ISO 1171:1981, Solid mineral fuels - Determination
for the froth flotation testing of fine coal, e.g. coal of
of ash.
particle size less than 0,5 mm. The procedure pro-
vides a means of evaluationg the general flotation
ISO 1213-1:1982, Solid mineral fuels - Vocabulary
characteristics of a coal under a set of specified
Part I: Terms relating 20 coal preparation.
Standard conditions and will not necessarily indicate
the full flotation potential of that coal.
ISO 1953:1972, Hard coals - Size analysis.
The flotation characteristics of coals are sensitive to
ISO 1988: 1975, Hard coal - Sampling.
changes in flotation conditions. These conditions
tan be changed by varying such basic Parameters
as flotation time, reagent and dosage rate. Separate
flotation tests are required to assess the effect of
3 Definitions
varying these Parameters to determine the best
flotation conditions for a particular coal. A method
For the purposes of this part of ISO 8858, the defi-
of evaluating flotation response will be given in a
nitions in ISO 1213-1 apply. The following defmitions
separate Standard.
from ISO 1213-1 are repeated for information only.
3.1 collector; collecting agent: A reagent added to
a pulp to bring about adhesion between solid parti-
cles and air bubbles.
2 Normative references
3.2 flotation concentrate: The clean product recov-
The following Standards contain provisions which,
ered in froth flotation.
through reference in this text, constitute provisions
of this patt of ISO 8858. At the time of publication,
3.3 conditioning: The preparatory Stage in the
the editions indicated were valid. All Standards are
flotation process in which the reagents are brought
subject to revision, and Parties to agreements based
into intimate contact with the solids of the pulp.
on this part of ISO 8858 are encouraged to investi-
gate the possibility of applying the most recent edi-
3.4 frother; frothing agent: A reagent used to con-
tions of the Standards indicated below. Members of
trol the size and stability of the air bubbles in the
IEC and ISO maintain registers of currently valid
flotation process.
International Standards.
3.5 froth flotation: A process for cleaning fine coal
ISO 331:1983, Coal - Determination of moisture in
in which the coal, with the aid of a reagent or rea-
the analysis Sample - Direct gravimetric method.
gents, becomes attached to air bubbles in a liquid
medium and floats as a froth.
ISO 565:1990, Test sieves - Metal wire cloth, perfo-
rated metal plate and electroformed sheet - Nominal
sizes of openings. 3.6 pulp: A mixture of solid particles and water.
---------------------- Page: 7 ----------------------
SIST ISO 8858-1:1998
ISO 88584:1990(E)
3.7 flotation tailings: The reject from froth flotation 6.2 Impeller assembly, of stainless steel and capa-
cells. ble of rotation at frequencies up to 1500 rev/min
(equivalent to a Speed of 5,7 m/s at the peripher-y).
The dimensions of the impeller and diffuser are
4 Prineiple
shown in figures 5 and 6.
The lower face of the impeller shall be positioned
Mixing of a coal Sample with water to form a sus-
no more than 5 mm from the base of the cell.
Pension in the flotation cell. Addition of collector and
frother and introduction of air. Separate recovery sf
NOTE 2 Impellers constructed of other materials may
the concentrate and tailings and determination of
be used, provided that it tan be shown that the charac-
the yield and ash of each.
teristics of flotation for the cell are similar to those ob-
tained when a stainless steel impeller is used. To achieve
NOTE 1 The use of Chemical additives or heat tan affect
this, different impeller rotational frequencies may be used
the flotation characteristics of the coal.
if necessary.
6.3 Constant level control, maintaining the level of
5 Reagents
the pulp in the cell during the flotation test.
During the analysis, use only reagents of recognized
6.4 Scraper, of the design shown in figure4. Its
analytical grade and only distilled water or water of
clearance at the sides of the cell shall be minimal
equivalent purity.
and should not exceed 2 mm. The scraper shall be
of such dimensions that it clears the pulp level (as
5.1 Collector, n-Dodecane.
defmed in 8.4) by not more than 2 mm.
5.2 Frother, Methyl iso-butyl carbinol (MIBC),
6.5 Calibrated micro-Syringe, for the addition of the
(4-Methylpentan-2-01) 0,14 % (V/ V) aqueous sol- collector (5.1).
ution.
6.6 Pipette, of capacity 25 ml, complying with
ISO 648, for the addition of the frother Solution (5.2).
6 Apparatus
6.7 Timing device, accurate to 1 s and capable of
The apparatus shall be a mechanical impeller type
being zeroed and started as required.
flotation machine (see figure 1) with the following
specifications.
6.8 Test sieves, complying with ISO 565, for the
particle size analysis of the feed.
6.1 Flotation cell, manufactured from stainless
steel.
7 Sampling
Figure 2 Shows the dimensions of the flotation cell.
The history and method of preparation of samples
The capacity of the cell with the deflector block and
tan affect considerably the flotation characteristics
impeller in place is approximately 3,5 litres.
of the coal. The origin of the Sample should be re-
lt has been shown that the results obtained from
corded and care should be taken to ensure that
Iaboratory froth flotation tests are very dependent
samples for comparison purposes are prepared in
on the procedure used to remove the concentrate
a similar manner. Since repeat tests are required
from the surface of the pulp. For this reason, a de-
together with sub-sampling for particle size and
flector block manufactured from plastics material
moisture determination, great care should be taken
(see figure 3) is used to guide the concentrate to a
in mixing and subdivision of the original Sample.
rectangular area in front of the impeller housing.
Where applicable, all sampling and subdivision of
The concentrate tan then be removed by means of
samples should be carried out in accordance with
a scraper (see frgure4) which is designed to cover
the procedures specified in ISO 1988.
the full width of the cell to a constant depth.
The quantity of gross Sample required is at least five
In Order to establish the volume of pulp which tan
times the quantity required for a Single flotation test.
be contained in the flotation cell, the deflector block
The latter quantity tan be determined by reference
is fitted into the cell and water is added to the
to 8.3.
flotation cell to about 20 mm to 30 mm below the
Where the Sample for flotation testing is obtained in
required pulp level. The impeller is started (air valve
pulp (or slurry) form, it will be necessary to separate
Off) and additional water is added to the required
mark (see 8.4
...
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