EN ISO 20565-2:2008

SLOVENSKI STANDARD
01-marec-2009
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Chemical analysis of chrome-bearing refractory products and chrome-bearing raw
materials (alternative to the X-ray fluorescence method) - Part 2: Wet chemical analysis
(ISO 20565-2:2008)
Chemische Analyse von chromhaltigen feuerfesten Erzeugnissen und chromhaltigen
Rohstoffen (Alternative zum Röntgenfluoreszenzverfahren) - Teil 2: Nasschemische
Verfahren (ISO 20565-2:2008)
Analyse chimique des produits réfractaires contenant du chrome et des matériaux bruts
contenant du chrome (méthode alternative a la méthode par fluorescence de rayons X) -
Partie 2: Méthodes d'analyse chimique par voie humide (ISO 20565-2:2008)
Ta slovenski standard je istoveten z: EN ISO 20565-2:2008
ICS:
71.040.40 Kemijska analiza Chemical analysis
81.080 Ognjevzdržni materiali Refractories
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 20565-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2008
ICS 81.080
English Version
Chemical analysis of chrome-bearing refractory products and
chrome-bearing raw materials (alternative to the X-ray
fluorescence method) - Part 2: Wet chemical analysis (ISO
20565-2:2008)
Analyse chimique des produits réfractaires contenant du Chemische Analyse von chromhaltigen feuerfesten
chrome et des matières premières contenant du chrome Erzeugnissen und chromhaltigen Rohstoffen (Alternative
(méthode alternative à la méthode par fluorescence de zum Röntgenfluoreszenzverfahren) - Teil 2:
rayons X) - Partie 2: Méthodes d'analyse chimique par voie Nasschemische Verfahren (ISO 20565-2:2008)
humide (ISO 20565-2:2008)
This European Standard was approved by CEN on 8 November 2008.
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 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 Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
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EUROPÄISCHES KOMITEE FÜR NORMUNG
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© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 20565-2:2008: E
worldwide for CEN national Members.

Contents Page
Foreword .3

Foreword
This document (EN ISO 20565-2:2008) has been prepared by Technical Committee ISO/TC 33 "Refractories"
in collaboration with Technical Committee CEN/TC 187 “Refractory products and materials” the secretariat of
which is held by BSI.
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 2009, and conflicting national standards shall be withdrawn at
the latest by June 2009.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 20565-2:2008 has been approved by CEN as a EN ISO 20565-2:2008 without any
modification.
INTERNATIONAL ISO
STANDARD 20565-2
First edition
2008-12-01
Chemical analysis of chrome-bearing
refractory products and chrome-bearing
raw materials (alternative to the X-ray
fluorescence method) —
Part 2:
Wet chemical analysis
Analyse chimique des produits réfractaires contenant du chrome et des
matières premières contenant du chrome (méthode alternative à la
méthode par fluorescence de rayons X) —
Partie 2: Méthodes d'analyse chimique par voie humide

Reference number
ISO 20565-2:2008(E)
©
ISO 2008
ISO 20565-2:2008(E)
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ii © ISO 2008 – All rights reserved

ISO 20565-2:2008(E)
Contents Page
Foreword. iv
1 Scope .1
2 Normative references .2
3 Determination of silicon(IV) oxide.2
4 Determination of aluminium oxide.5
5 Determination of total iron as iron(III) oxide .8
6 Determination of titanium(IV) oxide.11
7 Determination of manganese(II) oxide .13
8 Determination of calcium oxide .14
9 Determination of magnesium oxide.15
10 Determination of sodium oxide by flame photometry .18
11 Determination of potassium oxide by flame spectrophotometry .20
12 Determination of chromium(III) oxide.21
13 Determination of zirconium oxide by xylenol orange absorption spectroscopy.24
14 Determination of phosphorus(V) oxide by molybdenum blue method.25
15 Test report .27

ISO 20565-2:2008(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 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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. 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.
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.
ISO 20565-2 was prepared by Technical Committee ISO/TC 33, Refractories, in collaboration with Technical
Committee CEN/TC 187, Refractory products and materials.
ISO 20565 consists of the following parts, under the general title Chemical analysis of chrome-bearing
refractory products and chrome-bearing raw materials (alternative to the X-ray fluorescence method):
⎯ Part 1: Apparatus, reagents, dissolution and determination of gravimetric silica
⎯ Part 2: Wet chemical analysis
⎯ Part 3: Flame atomic absorption spectrometry (FAAS) and inductively coupled plasma atomic emission
spectrometry (ICP-AES)
iv © ISO 2008 – All rights reserved

INTERNATIONAL STANDARD ISO 20565-2:2008(E)

Chemical analysis of chrome-bearing refractory products and
chrome-bearing raw materials (alternative to the X-ray
fluorescence method) —
Part 2:
Wet chemical analysis
1 Scope
This part of ISO 20565 specifies traditional (“wet process”) methods for the chemical analysis of chrome-
bearing refractory products and raw materials.
It is applicable to components within the ranges of determination given in Table 1.
Table 1 — Range of determination (% by mass)
Component Range
SiO
0,5 to 10
Al O
2 to 30
2 3
Fe O
0,5 to 25
2 3
TiO
0,01 to 1
MnO 0,01 to 1
CaO 0,01 to 3
MgO 15 to 85
Na O
0,01 to 1
K O
0,01 to 1
Cr O
2 to 60
2 3
ZrO
0,01 to 0,5
P O
0,01 to 5
2 5
LOI
−0,5 to 5
NOTE These values are after the loss on ignition (LOI) has been
taken into account.
ISO 20565-2:2008(E)
2 Normative references
The following referenced documents are indispensable for the application 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 20565-1:2008, Chemical analysis of chrome-bearing refractory products and chrome-bearing raw
materials (alternative to the X-ray fluorescence method) — Part 1: Apparatus, reagents, dissolution and
determination of gravimetric silica
ISO 26845:2008, Chemical analysis of refractories — General requirements for wet chemical analysis, atomic
absorption spectrometry (AAS) and inductively compled plasma atomic emission spectromety (ICP-AES)
methods
3 Determination of silicon(IV) oxide
3.1 General
Determine the silicon(IV) oxide content using one of the following methods.
a) Combined use of the dehydration or the coagulation and molybdenum blue methods
This method is applied to samples consisting of more than 4 % by mass of silicon(IV) oxide.
b) Molybdenum blue method
This method is applied to samples consisting of less than 10 % by mass of silicon(IV) oxide.
3.2 Combined use of the coagulation and molybdenum blue methods
3.2.1 Principle
An aliquot portion of the stock solution (S1) (see ISO 20565-1), after pH adjustment, is treated with
ammonium molybdate and the silicomolybdate is reduced to yield molybdenum blue, the absorbance of which
is measured.
The sum of this residual silicon(IV) oxide in solution plus the mass of silicon(IV) oxide determined in
ISO 20565-1:2008, 9.2.2.3.3, gives the total silicon(IV) oxide content.
3.2.2 Procedure
This determination should be commenced with little delay after the stock solution (S1) is prepared, as
prolonged standing may allow polymerization of silica to occur leading to low results.
Transfer 10 ml of stock solution (S1) (see ISO 20565-1) to a 100 ml plastic beaker, add 2 ml of hydrofluoric
acid (1+9) and mix with a plastic rod. Allow to stand for 10 min and add 50 ml of boric acid solution. Add 2 ml
of ammonium molybdate solut
...