EN 17289-3:2020

SLOVENSKI STANDARD
01-februar-2021
Karakterizacija razsutih materialov - Določanje velikostno utežene fine frakcije in
deleža kristaliničnega kremena - 3. del: Metoda sedimentacije
Characterization of bulk materials - Determination of a size-weighted fine fraction and
crystalline silica content - Part 3: Sedimentation method
Charakterisierung von Schüttgütern - Bestimmung einer größengewichteten Feinfraktion
und des Anteils an kristallinem Quarz - Teil 3: Sedimentationsverfahren
Caractérisation des matériaux en vrac - Détermination de la fraction fine pondérée par
taille et de la teneur en silice cristalline - Partie 3 : Méthode par sédimentation
Ta slovenski standard je istoveten z: EN 17289-3:2020
ICS:
13.040.30 Kakovost zraka na delovnem Workplace atmospheres
mestu
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 17289-3
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2020
EUROPÄISCHE NORM
ICS 13.040.30
English Version
Characterization of bulk materials - Determination of a
size-weighted fine fraction and crystalline silica content -
Part 3: Sedimentation method
Caractérisation des matériaux en vrac - Détermination Charakterisierung von Schüttgütern - Bestimmung
de la fraction fine pondérée par taille et de la teneur en einer größengewichteten Feinfraktion und des Anteils
silice cristalline - Partie 3 : Méthode par sédimentation an kristallinem Quarz - Teil 3:
Sedimentationsverfahren
This European Standard was approved by CEN on 4 October 2020.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 17289-3:2020 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
Introduction . 5
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Symbols and abbreviations . 7
5 Assumptions . 8
6 Determination of SWFF and SWFFCS by sedimentation . 10
6.1 Determination of sedimentation time . 10
6.2 Selection of sedimentation liquid . 10
6.3 Sample preparation, sedimentation and SWFF determination . 11
6.4 Use of a dispersant of deflocculant . 13
6.5 Determination of the SWFF and SWFFCS of mixtures of phases with different particle
densities . 13
6.6 SWFF of mixtures . 13
6.7 SWFFCS of mixtures of homogeneous particles . 13
6.8 SWFFCS of mixtures of heterogeneous particles . 14
Annex A (normative) Separation of the SWFF by sedimentation . 16
A.1 Derivation for calculating the sedimentation parameters . 16
A.2 Calculation of the SWFF after sedimentation . 20
Annex B (normative) Determination and isolation of the size-weighted fine fraction (SWFF)
of kaolins and kaolinitic clays by sedimentation . 22
B.1 General . 22
B.2 Use range . 22
B.3 Equipment and consumables . 22
B.4 Method . 23
B.5 Figures . 25
Annex C (normative) Other minerals which can be treated in a similar way to
kaolins/kaolinitic clays for SWFF and SWFFCS determination . 28
C.1 General . 28
C.2 Andalusite . 28
C.3 Mica . 29
C.4 Vermiculite . 30
C.5 Talc . 30
Annex D (normative) Determination of the size-weighted fine fraction (SWFF and SWFFCS)
of Diatomaceous Earth (DE) by sedimentation . 32
D.1 General . 32
D.2 Categories of diatomaceous earth . 32
D.3 Equipment and consumables . 32
D.4 Method . 32
D.5 Determination of SWFF by sedimentation . 33
D.6 Determination of SWFFCS . 33
D.7 Example . 33
Annex E (normative) Determination of the size-weighted fine fraction (SWFF) of feldspar
products by sedimentation . 35
E.1 General . 35
E.2 Use range . 35
E.3 Consumables . 35
E.4 Method . 35
Bibliography . 40

European foreword
This document (EN 17289-3:2020) has been prepared by Technical Committee CEN/TC 137
“Assessment of workplace exposure to chemical and biological agents”, the secretariat of which is held
by DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by June 2021, and conflicting national standards shall be
withdrawn at the latest by June 2021.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Introduction
A method was developed in the industrial minerals industry for the purpose of determining the “size-
weighted relevant fine fraction” within the bulk material. This document sets out the methods which
can be used to measure and calculate the fine fraction of the bulk material and the fine fraction of the
crystalline silica, in several types of bulk materials. This information provides additional information to
users for their risk assessment and to compare bulk materials. It has been used in the industry and by
institutes previously under the acronym SWeRF. EN 17289 (all parts) is based on that industrial
method and specifies the analytical methods to determine the difference between materials with coarse
quartz and fine quartz, e.g. sands versus flour.
As further activities with the material (intentional or otherwise) can change the particle size
distribution, the size-weighted fine fraction can also change. Therefore, the method reports (in terms of
the mass fraction in the bulk material in percent) both, the total crystalline silica (CS) and the estimated
size-weighted fine fraction of CS.
Conventions as specified in EN 481 can be used as input for this document. However, the output of this
document is not related to the respirable fraction at the workplace and cannot be used to replace
workplace exposure measurements.
EN 17289 (all parts) specifies two procedures that can be used to estimate the size-weighted fine
fraction (SWFF) in bulk materials. It also specifies how the SWFF, once separated, can be further
analysed to measure the content of crystalline silica (SWFFCS). The method can be used for comparing
the fine fraction in different bulk samples. EN 17289 (all parts) uses the term fine fraction to indicate
that it does not analyse airborne particles, but it evaluates the proportion of particles in a bulk material
that, based on their particle size, have a potential to be respirable if they were to become airborne.
EN 17289 (all parts) also allows for the size-weighted fine fraction of crystalline silica (SWFFCS)
particles in bulk materials to be evaluated in terms of mass fraction in percent, if the fraction separated
is subsequently analysed by a suitable method.
In a comparison of similar bulk materials, in which the particle size distribution is the only variable, the
SWFF can provide useful information to guide material selection. For example, leaving all other factors
aside, a bulk material with a lower SWFF value can pose less of a risk in terms of potential occupational
exposure. For the actual exposure at the workplace, the handling etc. of the material, will play a major
role.
Concentrations of respirable
...