1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 15924:2011Fertilizers Determination ofthe fineness of grinding of softnatural phosphatesBS EN 15924:2011 BRITISH STANDARDNational forewordThis British Standard is the UK im
2、plementation of EN 15924:2011. Itsupersedes DD CEN/TS 15924:2009 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee CII/37, Fertilisers and related chemicals.A list of organizations represented on this committee can beobtained on request to its secretary.T
3、his publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2011ISBN 978 0 580 73960 6ICS 65.080Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under t
4、he authority of theStandards Policy and Strategy Committee on 31 October 2011.Amendments issued since publicationDate Text affectedBS EN 15924:2011EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 15924 September 2011 ICS 65.080 Supersedes CEN/TS 15924:2009English Version Fertilizers - Determinat
5、ion of the fineness of grinding of soft natural phosphates Engrais - Dtermination de la finesse de monture des phosphates naturels tendres Dngemittel - Bestimmung der Mahlfeinheit von weicherdigem Rohphosphat This European Standard was approved by CEN on 18 August 2011. CEN members are bound to comp
6、ly 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
7、 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 sa
8、me 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, P
9、ortugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any me
10、ans reserved worldwide for CEN national Members. Ref. No. EN 15924:2011: EBS EN 15924:2011EN 15924:2011 (E) 2 Contents Page Foreword 31 Scope 42 Normative references 43 Terms and definitions .44 Principle 45 Sampling .46 Reagents .47 Apparatus .58 Procedure .59 Calculation and expression of the resu
11、lt 610 Test report 6Bibliography 7BS EN 15924:2011EN 15924:2011 (E) 3 Foreword This document (EN 15924:2011) has been prepared by Technical Committee CEN/TC 260 “Fertilizers and liming materials”, the secretariat of which is held by DIN. This European Standard shall be given the status of a national
12、 standard, either by publication of an identical text or by endorsement, at the latest by March 2012, and conflicting national standards shall be withdrawn at the latest by March 2012. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent right
13、s. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes CEN/TS 15924:2009. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. The following changes have b
14、een made to the former edition: a) the CEN Technical Specification has been adopted as a European Standard; b) the document has been editorially revised. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this Eur
15、opean 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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and
16、the United Kingdom. BS EN 15924:2011EN 15924:2011 (E) 4 1 Scope This document specifies a method for the determination of the fineness of grinding of soft natural phosphates by wet sieving. 2 Normative references The following referenced documents are indispensable for the application of this docume
17、nt. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1482-2, Fertilizers and liming materials Sampling and sample preparation Part 2: Sample preparation EN 12944-1:1999, Fertilizers and
18、liming materials and soil improvers Vocabulary Part 1: General terms EN 12944-2:1999, Fertilizers and liming materials and soil improvers Vocabulary Part 2: Terms relating to fertilizers 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 12944-1:1999 and
19、 EN 12944-2:1999 apply. 4 Principle For samples of fine particle size, agglomeration may occur, thus making dry sieving difficult. For this reason, wet sieving is normally used. By mechanical wet sieving, the quantities of product with a granule size greater than 0,125 mm and those with a granule si
20、ze between 0,063 mm and 0,125 mm are determined, and the percentage of fineness of grinding is calculated. 5 Sampling Sampling is not part of the method specified in this document. A recommended sampling method is given in EN 1482-1. Sample preparation shall be carried out in accordance with EN 1482
21、-2. 6 Reagents 6.1 Sodium hexametaphosphate, solution 1 %. BS EN 15924:2011EN 15924:2011 (E) 5 7 Apparatus 7.1 Sieves, with aperture sizes of 0,063 mm and 0,125 mm respectively of standard ranges, diameter 20 cm and height 5 cm). 7.2 Collecting containers. 7.3 Glass funnel, of 20 cm diameter mounted
22、 on a stand. 7.4 250 ml beakers. 7.5 Drying oven. 8 Procedure 8.1 Test portion Weigh, to the nearest 0,05 g, approximately 50 g of the laboratory sample. Wash both sides of the sieve with water and place the sieve with 0,125 mm apertures above the 0,063 mm sieve. 8.2 Sieving procedure 8.2.1 Place th
23、e test portion (8.1) on the top sieve. Sieve under a small jet of cold water (tap water may be used) until the water is practically clear when it passes through. Care should be taken to ensure that the flow of water is such that the lower sieve never will be filled with water. 8.2.2 When the residue
24、 on the top sieve seems to remain more or less constant, remove this sieve, and place on a collecting container (7.2). 8.2.3 Continue the wet sieving through the lower sieve for a few minutes, until the water passing through is nearly clear. 8.2.4 Replace the 0,125 mm sieve over the 0,063 mm sieve.
25、Transfer any deposit from the collecting container to the top sieve and begin sieving again under a small jet of water until this water becomes almost clear once more. 8.2.5 Quantitatively transfer each of the residues into a different weighed beaker (7.4) by means of the funnel (7.3). Suspend each
26、residue by filling the beakers with water. Leave to stand for about 1 min, decant, as much water as possible. 8.2.6 Place the beakers in the drying oven (7.5) at (150 5) C until constant weight. 8.2.7 Allow them to cool and weigh. 8.2.8 If the presence of lumps is observed after sieving, the analysi
27、s should be carried out again in the following way. Slowly pour 50 g of the laboratory sample into a 1 l flask containing 500 ml of the sodium hexametaphosphate solution (6.1) stirring continuously. Stopper the flask and shake vigorously by hand to break up the lumps. Transfer the whole suspension i
28、nto the top sieve and wash the flask thoroughly. Continue the analysis as described in 8.2. BS EN 15924:2011EN 15924:2011 (E) 6 9 Calculation and expression of the result Calculate the fineness of grinding of the sample passing the sieve with 0,125 mm aperture size, F0,125, in percent (mass fraction
29、) according to the following equation: 2)(10,125= MMF (1) Calculate the fineness of grinding of the sample passing the sieve with 0,063 mm aperture size, F0,063, in percent (mass fraction) according to the following equation: 2)(210,063+= MMMF (2) where M is the mass, in grams, of the test portion;
30、M1is the mass, in grams, of the residue on the sieve, with 0,125 mm aperture size; M2is the mass, in grams, of the residue on the sieve, with 0,063 mm aperture size. Round up the results of these calculations to the nearest unit. 10 Test report The test report shall contain at least the following in
31、formation: a) the test method used with a reference to this document; b) all information necessary for the complete identification of the sample; c) date of sampling and sampling procedure (if known); d) date when the analysis was finished; e) the results of the determination, expressed as percentag
32、e of fineness of the fertilizer; f) all operating details not specified in this document, or regarded as optional, together with details of any incidents that occurred when performing the method which might have influenced the test result(s). BS EN 15924:2011EN 15924:2011 (E) 7 Bibliography 1 EN 148
33、2-1, Fertilizers and liming materials Sampling and sample preparation Part 1: Sampling 2 Regulation (EC) No 2003/2003 of the European Parliament and of the Council of 13 October 2003 relating to fertilisers, Official Journal L 304, 21/11/2003, pp. 1-194, Annex IV, method 7.2 This page deliberately l
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