BS-EN-12475-2-1998 BS-7225-1.3-1998.pdf

| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 12475-2:1998 BS 7225-1-1.3:1998 The European Standard EN 12475-2:1998 has the status of a British Standard ICS 81.080 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Classification of dense shaped refractory products Ð Part 2: Basic products containing less than 7 % residual carbon Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 08:57:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI This British Standard, having been prepared under the direction of the Sector Board for Materials and Chemicals, was published under the authority of the Standards Board and comes into effect on 15 June 1998 BSI 1998 ISBN 0 580 29379 3 BS EN 12475-2:1998 Amendments issued since publication Amd. No.DateText affected National foreword This British Standard is the English language version of EN 12475-2:1998. It supersedes BS 7225-1-1.3:1989 which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee RPI/1, Refractory products and materials, to Subcommittee RPI/1/1, Sampling and physical testing of refractory materials, which has the responsibility to: Ð aid enquirers to understand the text; Ð present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; Ð monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled ªInternational Standards Correspondence Indexº, or by using the ªFindº facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 4, an inside back cover and a back cover. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 08:57:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI CEN European Committee for Standardization Comite  Europe Âen de Normalisation Europa Èisches Komitee fu Èr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1998 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12475-2:1998 E EUROPEAN STANDARDEN 12475-2 NORME EUROPE ÂENNE EUROPA ÈISCHE NORM February 1998 ICS 81.080 Descriptors: Refractory materials, shaped refractories, dense shaped refractory products, nomenclature, classifications, designation, raw materials, magnesia refractories, dolomite: minerals, lime, chromate, refractories English version Classification of dense shaped refractory productsÐ Part 2: Basic products containing less than 7% residual carbon Classification des produits re Âfractaires faõonne Âs denses Ð Partie 2: Produits basiques contenant moins de 7 % de carbone re Âsiduel Klassifizierung dichter geformter feuerfester Erzeugnisse Ð Teil 2: Basische Erzeugnisse mit einem Massenanteil an Restkohlenstoff kleiner als 7 % This European Standard was approved by CEN on 18 January 1998. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 08:57:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 2 EN 12475-2:1998 BSI 1998 Foreword This European Standard has been prepared by 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 August 1998, and conflicting national standards shall be withdrawn at the latest by August 1998. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. EN 12475, Classification of dense shaped refractory products consists of four parts: Ð Part 1: Alumina-silica products; Ð Part 2: Basic products containing less than 7 % residual carbon; Ð Part 3: Basic products containing from 7 % to 30 % residual carbon; Ð Part 4: Special products. Contents Page Foreword2 1Scope3 2Normative references3 3Classification3 4Designation3 Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 08:57:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 3 EN 12475-2:1998 BSI 1998 1 Scope This part of EN 12475 specifies the classification and designation of dense shaped basic refractory products with or without antioxidant additives. Products containing equal to or more than 7 % residual carbon after coking are excluded from this classification. The classification is applicable to dense shaped products with or without metal plates and reinforcement. NOTE 1EN 12475-3 covers the classification of dense shaped basic products containing from 7 % to 30 % residual carbon. NOTE 2All bricks can be encased in metal plate and all unfired bricks can be reinforced by means of an internal metal plate. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references, the latest edition of the publication referred to applies. EN ISO 10058, Magnesites and dolomites Ð Chemical analysis. prEN 955-3, Chemical analysis of refractory products Ð Part 3: Chrome bearing materials. prEN 955-5, Chemical analysis of refractory products Ð Part 5: XRF analysis by the fused cast bead method. 3 Classification 3.1 Basis of classification Dense shaped basic products containing less than 7 % carbon shall be classified according to the following five criteria: a) the type of product; b) the group determined principally by its magnesia content; c) the state of the raw materials; d) the nature of the bond; e) any post treatment. 3.2 Type of product The types of dense shaped refractory products of the basic series included in this classification are: a) magnesia (M); b) magnesia doloma (MD); c) doloma (D); d) magnesia spinel (MSp); e) forsterite (F); f) magnesia chromite (MCr); g) chromite (Cr); h) lime (L); i) magnesia zirconia silica (MZ, MZS). These product types shall be classified in accordance with Tables 1 and 2, by their chemical analysis carried out on the calcined samples in accordance with EN ISO 10058, prEN 955-3 or prEN 955-5. 3.3 Classification groups The product types shall be classified into groups according to Tables 1 and 2. The primary criteria for the group classification shall be the magnesia content of the product type with each group generally covering a range of magnesia content of 5 % to 10 %. For some products (MD, D, L, Cr, MZ, MZS), limits on other essential oxide constituents are imposed on the various groups. The product types with antioxidant additives shall be classified according to the same criteria with the addition of a suffix A, indicating the presence of antioxidant additives. 3.4 State of raw materials The raw materials shall be classified by using one or more of the four designations as follows: a) naturally occurring, (raw or sintered); b) synthetic sintered; c) co-clinker; d) fused. 3.5 Nature of the bond The bonding system shall be classified by using one of the four designations as follows: a) ceramic bond: formed by sintering during firing; b) organic chemical bond: formed at ambient temperature or higher temperatures; c) inorganic chemical bond: formed by chemical reaction; d) fusion cast: formed by total fusion of the product. 3.6 Post treatment Any post treatment shall be classified by using one or both of the two designations: a) tempering (at a temperature up to 800 8C); b) impregnation. NOTEThere may be no post treatment. 4 Designation The designation of dense shaped refractory products of the basic series (7 % residual carbon) shall comprise the listing of the five criteria of classification given in clause 3: type, group, state of raw materials, nature of bond, post treatment. EXAMPLES a) magnesia chromite product of the group MCr 60, based on synthetic sintered magnesia and naturally occurring chromite, with a ceramic bond; b) doloma product of the group D 40, based on naturally occurring sintered doloma, with a ceramic bond; c) magnesia product of the group M 95, based on synthetic sintered magnesia, with an organic chemical bond, tempered and impregnated. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 08:57:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 4 EN 12475-2:1998 BSI 1998 Table 1 Ð Classification of magnesia and magnesia-calcia series Product typeGroupContents m % MgOCaO MagnesiaM 98MgO $ 98 MagnesiaM 9595 # MgO 98 MagnesiaM 9090 # MgO 95 MagnesiaM 8585 # MgO 90 MagnesiaM 8080 # MgO 85 Magnesia dolomaMD 8080 # MgO 90CaO $ 10 Magnesia dolomaMD 7070 # MgO 80CaO $ 20 Magnesia dolomaMD 6060 # MgO 70CaO $ 30 Magnesia dolomaMD 5050 # MgO 60CaO $ 40 Magnesia dolomaMD 4040 # MgO 50CaO $ 50 DolomaD 40MgO 40CaO $ 50 LimeL 70MgO 30CaO $ 70 Table 2 Ð Classification of other basic products containing magnesia Product typeGroupContents m % MgOCr2O3ZrO2SiO2 Magnesia spinelMSp 80MgO $ 80 Magnesia spinelMSp 7070 # MgO 80 Magnesia spinelMSp 6060 # MgO 70 Magnesia spinelMSp 5050 # MgO 60 Magnesia spinelMSp 4040 # MgO 50 Magnesia spinelMSp 3030 # MgO 40 Magnesia spinelMSp 2020 # MgO 30 ForsteriteF 50MgO $ 50 ForsteriteF 4040 # MgO 50 Magnesia chromiteMCr 80MgO $ 80 Magnesia chromiteMCr 7070 # MgO 80 Magnesia chromiteMCr 6060 # MgO 70 Magnesia chromiteMCr 5050 # MgO 60 Magnesia chromiteMCr 4040 # MgO 50 Magnesia chromiteMCr 3030 # MgO 40 ChromiteCr 30MgO 30Cr2O3$ 30 Magnesia zirconia silicaMZ 90MgO $ 90ZrO2 10 Magnesia zirconia silicaMZ 7070 # MgO 90ZrO2$ 10 Magnesia zirconia silicaMZS 7070 # MgO 905 # ZrO2 155 # SiO2 Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 08:57:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI blank Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 08:57:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BSI Ð British Standards Institution BSI is the independent national body responsible for preparing British Standards. 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