ISO 10086-1:2019
(Main)Coal — Methods for evaluating flocculants for use in coal preparation — Part 1: Basic parameters
Coal — Methods for evaluating flocculants for use in coal preparation — Part 1: Basic parameters
This document specifies a method for the comparative evaluation of the performances of flocculants for clarification, thickening and sedimentation applications on a given slurry. This performance can be evaluated by a) the settling velocity in the initial period, b) the sediment volume after compaction and consolidation, and c) the clarity of the supernatant liquid.
Charbon — Méthodes d'évaluation des floculants utilisés dans la préparation des charbons — Partie 1: Paramètres de base
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Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 10086-1
Second edition
2019-07
Coal — Methods for evaluating
flocculants for use in coal
preparation —
Part 1:
Basic parameters
Charbon — Méthodes d'évaluation des floculants utilisés dans la
préparation des charbons —
Partie 1: Paramètres de base
Reference number
ISO 10086-1:2019(E)
©
ISO 2019
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ISO 10086-1:2019(E)
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ii © ISO 2019 – All rights reserved
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ISO 10086-1:2019(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus . 1
6 Materials . 3
6.1 Slurry . 3
6.2 Water . 3
7 Sampling . 3
8 Preparation of flocculant solutions . 3
8.1 Powder flocculants . 3
8.2 7.2 Liquid flocculants . 4
9 Procedure. 4
9.1 Preparation of test sample . 4
9.2 Determination of settling rate . 4
9.2.1 Free settling rate . 4
9.2.2 Full settling curve . 5
9.3 Determination of sediment height and supernatant clarity . 5
10 Calculation of results . 5
10.1 Flocculant dosage rate . 5
11 Recording of results . 6
12 Repeatability . 6
13 Test report . 6
Annex A (informative) Worked example . 8
Annex B (informative) Data recording sheets .11
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ISO 10086-1:2019(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. Each member body interested in a subject for which a technical
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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 documents 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).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www. iso.o rg/patents).
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see www. iso .org/iso/foreword. html.
This document was prepared by Technical Committee ISO/TC 27, Solid mineral fuels, Subcommittee
SC 1, Coal preparation: Terminology and performance.
This second edition cancels and replaces the first edition (ISO 10086-1:2000), of which it
constitutes a minor revision.
A list of all parts in the ISO 10086 series can be found on the ISO website.
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.
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INTERNATIONAL STANDARD ISO 10086-1:2019(E)
Coal — Methods for evaluating flocculants for use in coal
preparation —
Part 1:
Basic parameters
1 Scope
This document specifies a method for the comparative evaluation of the performances of flocculants
for clarification, thickening and sedimentation applications on a given slurry. This performance can be
evaluated by
a) the settling velocity in the initial period,
b) the sediment volume after compaction and consolidation, and
c) the clarity of the supernatant liquid.
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 1171, Solid mineral fuels — Determination of ash
ISO 1953, Hard coal — Size analysis by sieving
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
4 Principle
The performance of different flocculants on a given slurry is determined by measuring the relative
settling rates.
A flocculant solution is added to an aliquot of the slurry in a measuring cylinder and the formation of
an interface between the supernatant liquid and the suspension is observed. An initial settling rate is
calculated and is plotted against flocculant dosage to evaluate the performance of the flocculant.
5 Apparatus
Usual laboratory apparatus, and
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ISO 10086-1:2019(E)
5.1 Stirrers, two variable-speed motorized stirrers capable of 1 000 r/min (one for flocculant
preparation and one for sample homogenization).
5.2 Plastic moulded cylinders, of capacity 500 ml, graduated in 5 ml scale divisions and having
rubber stoppers. Where these are not available, glass cylinders, of capacity 500 ml ± 2 ml, graduated
in 5 ml scale divisions and having ground-glass stoppers, may be a satisfactory alternative. However,
differences in settling rates may result, because of differences in the graduated height.
A vertical scale may be attached to or mounted beside the cylinder, with the zero point coinciding with
the 5 ml mark of the cylinder.
5.3 Syringes, having nominal capacities of 1 ml, 2 ml, 5 ml, 10 ml and 50 ml.
5.4 Timer, capable of reading 0,1 s to a total of 10 000 s.
5.5 Clarity wedge, as shown in Figure 1, having a scale in black numbers on a white background (or
vice versa) printed inside the back.
Dimensions in millimetres, not to scale
Key
1 transparent plastic sides and front
wall thickness: 4 mm
2 suspension level
Figure 1 — Clarity wedge
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ISO 10086-1:2019(E)
6 Materials
6.1 Slurry
Flocculant evaluation shall be carried out on a slurry collected from the coal preparation plant and free
from flocculant contamination. The sample shall be collected in at least 10 increments over a minimum
of 2 h of stable operating conditions, to give a total sample volume of 50 l or more.
The sample shall be collected in a container that is inert to the slurry and stored in a suitable
environment that maintains a temperature of 20 °C ± 2 °C. Storage may affect the characteristics of the
sample and, hence, affect the relative performance of the flocculants. Therefore, the sample shall be
used as soon as possible, but not later than 24 h after collection.
A size analysis and ash determination shall be performed on the solids in th
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