1、BSI Standards PublicationBS EN 12518:2014Chemicals used for treatmentof water intended for humanconsumption High-calciumlimeBS EN 12518:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 12518:2014. It supersedes BS EN 12518:2008 which is withdrawn.The UK part
2、icipation in its preparation was entrusted to Technical Committee CII/59, Chemicals for drinking water treatment.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract.
3、Users are responsible for its correct application. The British Standards Institution 2014.Published by BSI Standards Limited 2014ISBN 978 0 580 84654 0 ICS 13.060.20; 71.100.80 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under
4、the authority of the Standards Policy and Strategy Committee on 30 September 2014.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12518 July 2014 ICS 71.100.80 Supersedes EN 12518:2008English Version Chemicals used for tr
5、eatment of water intended for human consumption - High-calcium lime Produits chimiques pour le traitement de leau destine la consommation humaine - Chaux Produkte zur Aufbereitung von Wasser fr den menschlichen Gebrauch - Weikalk This European Standard was approved by CEN on 20 June 2014. CEN member
6、s 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
7、 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 Managemen
8、t 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Li
9、thuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17,
10、 B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12518:2014 EBS EN 12518:2014EN 12518:2014 (E) 2 Contents Page Foreword 3 Introduction .4 1 Scope 5 2 Normative references 5 3 Description .5 4 Purity criteria 8
11、5 Test methods . 10 6 Labelling - Transportation - Storage . 10 Annex A (informative) General information on high-calcium lime 13 A.1 Origin . 13 A.1.1 Raw materials 13 A.1.2 Manufacturing process 13 A.2 Use . 13 A.2.1 Function . 13 A.2.2 Form in which it is used . 13 A.2.3 Other properties 13 A.2.4
12、 Treatment dose . 13 A.2.5 Means of application 14 A.2.6 Secondary effects . 14 A.2.7 Removal of excess product . 14 Annex B (normative) General rules relating to safety . 15 B.1 Rules for safe handling and use . 15 B.2 Emergency procedures 15 B.2.1 First aid 15 B.2.2 Spillage 15 B.2.3 Fire . 15 Bib
13、liography . 16 BS EN 12518:2014EN 12518:2014 (E) 3 Foreword This document (EN 12518:2014) has been prepared by Technical Committee CEN/TC 164 “Water supply”, the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of a
14、n identical text or by endorsement, at the latest by January 2015 and conflicting national standards shall be withdrawn at the latest by January 2015. 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
15、 held responsible for identifying any or all such patent rights. This document supersedes EN 12518:2008. The significant technical difference between this edition and EN 12518:2008 is the replacement of warning and safety precaution notes by labelling according to REGULATION (EC) No 1272/2008 (see 2
16、). 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, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France,
17、Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 12518:2014EN 12518:2014 (E) 4 Introduction In respect of potential adverse eff
18、ects on the quality of water intended for human consumption, caused by the product covered by this European Standard: a) this European Standard provides no information as to whether the product may be used without restriction in any of the Member States of the EU or EFTA; b) it should be noted that,
19、 while awaiting the adoption of verifiable European criteria, existing national regulations concerning the use and/or the characteristics of this product remain in force. NOTE Conformity with this European Standard does not confer or imply acceptance or approval of the product in any of the Member S
20、tates of the EU or EFTA. The use of the product covered by this European Standard is subject to regulation or control by National Authorities. BS EN 12518:2014EN 12518:2014 (E) 5 1 Scope This European Standard is applicable to high-calcium lime used for treatment of water intended for human consumpt
21、ion. It describes the characteristics of high-calcium lime and specifies the requirements and the corresponding test methods for high-calcium lime. It gives information on its use in water treatment. It also determines the rules relating to safe handling and use (see Annex B). 2 Normative references
22、 The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 124
23、85, Chemicals used for treatment of water intended for human consumption - Calcium carbonate, high-calcium lime, half-burnt dolomite, magnesium oxide and calcium magnesium carbonate - Test methods 3 Description 3.1 Identification 3.1.1 General High-calcium limes are calcium oxide, calcium hydroxide
24、and aqueous suspension of calcium hydroxide (milk of lime). 3.1.2 Chemical names a) Calcium oxide. b) Calcium hydroxide. 3.1.3 Synonym or common names a) Calcium oxide: Pulverized high-calcium lime, quicklime, lump high-calcium lime. b) Calcium hydroxide: Hydrated high-calcium lime, calcium hydroxid
25、e - aqueous suspension (milk of lime). 3.1.4 Relative molecular mass a) Calcium oxide: 56,08. b) Calcium hydroxide: 74,09. 3.1.5 Empirical formula a) Calcium oxide: CaO. b) Calcium hydroxide: Ca(OH)2. 3.1.6 Chemical formula a) Calcium oxide: CaO. b) Calcium hydroxide: Ca(OH)2. BS EN 12518:2014EN 125
26、18:2014 (E) 6 3.1.7 CAS Registry Number 1)a) Calcium oxide: 1305-78-8. b) Calcium hydroxide: 1305-62-0. 3.1.8 EINECS reference 2)a) Calcium oxide: 215-138-9. b) Calcium hydroxide: 215-137-3. 3.2 Commercial forms High-calcium lime is available in the following commercial forms: pulverized high calciu
27、m lime (quicklime): white powder (CaO); lump high-calcium lime (quicklime): white lump (CaO); hydrated high-calcium lime: white powder, (Ca(OH)2); milk of lime: aqueous suspension of calcium hydroxide (usual content of calcium hydroxide is a mass fraction between 10 % to 40 %). 3.3 Physical properti
28、es 3.3.1 Appearance a) Calcium oxide: white, lumps or powder. b) Calcium hydroxide: white powder. c) Calcium hydroxide suspension: aqueous, milky suspension. 3.3.2 Density a) Calcium oxide: 3,35 kg/dm3at 20 C. Bulk density: 800 kg/m3to 1 200 kg/m3; b) Calcium hydroxide: 2,24 kg/dm3at 20 C. Bulk dens
29、ity: 300 kg/m3to 600 kg/m3. 3.3.3 Solubility (in water) Calcium oxide: not applicable. Calcium hydroxide: 1,85 g/l at 0 C 1,65 g/l at 20 C 1,53 g/l at 30 C 1) Chemical Abstracts Service Registry Number. 2) European Inventory of Existing Commercial Chemical Substances. BS EN 12518:2014EN 12518:2014 (
30、E) 7 1,40 g/l at 40 C 1,28 g/l at 50 C 1,16 g/l at 60 C 1,04 g/l at 70 C 0,92 g/l at 80 C 0,81 g/l at 90 C 0,71 g/l at 100 C 3.3.4 Vapour pressure Not applicable. 3.3.5 Boiling point at 100 kPa3)a) Calcium oxide: 2 850 C. b) Calcium hydroxide: Decomposes at 580 C and forms calcium oxide and water. 3
31、.3.6 Melting point a) Calcium oxide: 2 570 C. b) Calcium hydroxide: Decomposes at 580 C and forms calcium oxide and water. c) Calcium hydroxide suspension: freezes at 0 C. 3.3.7 Specific heat Not applicable. 3.3.8 Viscosity (dynamic) For calcium hydroxide suspension: depends on concentration and par
32、ticle size. 3.3.9 Critical temperature Not applicable. 3.3.10 Critical pressure Not applicable. 3.3.11 Physical hardness Not applicable. 3.4 Chemical properties Aqueous suspensions are strongly alkaline. Calcium oxide (CaO) reacts with water to form calcium hydroxide Ca(OH)2, and with acids to form
33、calcium salts. These reactions are highly exothermic. 3) 100 kPa = 1 bar. BS EN 12518:2014EN 12518:2014 (E) 8 4 Purity criteria 4.1 General This European Standard specifies the minimum purity requirements for high-calcium lime used for the treatment of water intended for human consumption. Limits ar
34、e given for impurities commonly present in the product. Depending on the raw material and the manufacturing process other impurities may be present and, if so, this shall be notified to the user and when necessary to relevant authorities. Users of this product should check the national regulations i
35、n order to clarify whether it is of appropriate purity for treatment of water intended for human consumption, taking into account raw water quality, required dosage, contents of other impurities and additives used in the product not stated in this product standard. Limits have been given for impurit
36、ies and chemical parameters where these are likely to be present in significant quantities from the current production process and raw materials. If the production process or raw materials leads to significant quantities of impurities, by-products or additives being present, this shall be notified t
37、o the user. 4.2 Composition of commercial product The products shall conform to the requirements specified in Table 1. Table 1 Major constituents and grading Parameter Pulverized high-calcium lime Lump high-calcium lime Hydrated high-calcium lime Milk of limebClass 1 Class 2 Class 3 Class 1 Class 2
38、Class 3 Class 1 Class 2 Class 3 Class 1 Class 2 Class 3 Content of water-soluble CaO expressed as CaO in mass fraction in % 87a 84 80 87a 84 80 Content of water-soluble Ca(OH)2in dry substance expressed as Ca(OH)2in mass fraction in % 92a 87 83 92a 87 83 Retention on sieving in mass fraction in % dr
39、y substance 0,60 mm 0,1 0,1 0,1 not applicable 0,1 0,1 0,1 0,1 0,1 0,1 0,09 mm 7,0 7,0 7,0 not applicable 5,5 5,5 5,5 5,5 5,5 5,5 aThe user may specify a higher content of lime. bSee A.2.3 (for solubility index). 4.3 Impurities The products shall conform to the requirements specified in Table 2. BS
40、EN 12518:2014EN 12518:2014 (E) 9 Table 2 Impurities Impurity Limit in mass fraction in % of dry product Grade 1 Grade 2 Grade 3 Si expressed as SiO2max. 2,5 3,0 4,0 Al expressed as Al2O3max. 0,5 1,0 2,0 Fe expressed as Fe2O3max. 0,5 1,0 1,5 Mn expressed as MnO2max. 0,2 0,4 0,5 CaCO3max. 7,0 8,0 9,0
41、NOTE The user can specify a lower content of impurities. 4.4 Water insoluble matter The product shall conform to the requirements specified in Table 3. Table 3 Water insoluble matter Parameter Pulverized / Lump high calcium lime Hydrated high calcium lime / milk of lime Grade A Grade B Grade C Grade
42、 A Grade B Grade C Content of water insoluble matter in mass fraction in % 13 16 20 8 13 17 NOTE The user can specify a lower value for water insoluble matter. 4.5 Chemical parameters The product shall conform to the requirements specified in Table 4. Table 4 Chemical parameters Parameter Limit in m
43、g/kg of dry product Type 1 Type 2 Arsenic (As) max. 5 20 Cadmium (Cd) max. 2 2 Chromium (Cr) max. 20 20 Mercury (Hg) max. 0,3 0,5 Nickel (Ni) max. 10 20 Lead (Pb) max. 10 50 Antimony (Sb) max. 3 4 Selenium (Se) max. 3 4 NOTE 1 Other chemical parameters and indicator parameters are not relevant in hi
44、gh-calcium lime because the raw materials used in the manufacturing process are free of them. For parametric values of high-calcium lime on trace metal content in drinking water, see Directive 98/83/EC 1. NOTE 2 The user can specify a lower content of chemical parameters. 4.6 Free water The content
45、of free water in the delivered product shall be less than a mass fraction of 2,0 %. BS EN 12518:2014EN 12518:2014 (E) 10 NOTE The user can specify a lower content of free water. 5 Test methods 5.1 Sampling Prepare the laboratory samples in accordance with EN 12485. 5.2 Analyses Use the relevant meth
46、ods for analysis described in EN 12485. 6 Labelling - Transportation - Storage 6.1 Means of delivery High-calcium lime shall be delivered in bags, containers or as bulk material. In order that the purity of the products is not affected, the means of delivery shall not have been used previously for a
47、ny different product or it shall have been specially cleaned and prepared before use. 6.2 Labelling according to the EU legislation4)The following labelling requirements shall apply to high-calcium-limes at the date of publication of this European Standard. 4) See 2. BS EN 12518:2014EN 12518:2014 (E
48、) 11 Hazard pictograms Precautionary statements (“P statements”) should be provided by the company being responsible for the marketing of the substance. They should be indicated on the packaging label and in the extended safety data sheet (eSDS) of the substance. GHS05 Signal word: Danger Hazard sta
49、tement: H318: Causes serious eye damage GHS07 Signal word: Warning Hazard statement: H315: Causes skin irritation H335: May cause respiratory irritation EU Regulation No 1272/2008 2, and its amendments for the purposes of its adaptation to technical and scientific progress, contains a list of substances classified by the EU. Substances not listed in this regulation should be classified on the basis of their intrinsic properties according to the criteria in the
