1、December 2011 Translation by DIN-Sprachendienst.English price group 7No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).IC
2、S 65.080!$xZN“1855543www.din.deDDIN EN 15924Fertilizers Determination of the fineness of grinding of soft natural phosphatesEnglish translation of DIN EN 15924:2011-12Dngemittel Bestimmung der Mahlfeinheit von weicherdigem RohphosphatEnglische bersetzung von DIN EN 15924:2011-12Engrais Dtermination
3、de la finesse de monture des phosphates naturels tendresTraduction anglaise de DIN EN 15924:2011-12SupersedesDIN SPEC 1110(DIN CEN/TS 15924):2010-02www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 8 pages11.11 DIN EN 15924:2011-12 A comm
4、a is used as the decimal marker. National foreword This standard has been prepared by Technical Committee CEN/TC 260 “Fertilizers and liming materials” (Secretariat: DIN, Germany) under the mandate M/335. The responsible German body involved in its preparation was the Normenausschuss Lebensmittel un
5、d landwirtschaftliche Produkte (Food and Agricultural Products Standards Committee), Working Committee NA 057-03-02 AA Dngemittel. The method specified in this standard is based upon Regulation (EC) No 2003/2003 relating to fertilizers, Annex IV, method 7.2 (see Bibliography). DIN EN 15924 supersede
6、s DIN SPEC 1110 (DIN CEN/TS 15924):2010-02, which has been adopted as a European Standard based on the results of the unique acceptance procedure. Amendments This standard differs from DIN SPEC 1110 (DIN CEN/TS 15924):2010-02 as follows: a) the DIN SPEC prestandard status has been changed to that of
7、 a European standard; b) the standard has been editorially revised. Previous editions DIN CEN/TS 15924: 2010-02 2 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 15924 September 2011 ICS 65.080 Supersedes CEN/TS 15924:2009English Version Fertilizers - Determination of the fineness of grinding o
8、f 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 comply with the CEN/CENELEC Internal
9、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
10、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 version
11、s. 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, Romania, Slovakia, Slove
12、nia, Spain, Sweden, Switzerland and United Kingdom. Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 15924:2011: EEUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORM
13、ALISATION EUROPISCHES KOMITEE FR NORMUNG EN 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 result 610 Test report 6Bibliography 6DIN EN 15924:20
14、11-12 EN 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 standard, either by publication of an ident
15、ical 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 rights. CEN and/or CENELEC shall not be held resp
16、onsible 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 been made to the former edition: a) the CEN T
17、echnical 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 European Standard: Austria, Belgium, Bulgaria,
18、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 the United Kingdom. DIN EN 15924:2011-12 EN
19、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 document. For dated references, only the edit
20、ion 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 liming materials and soil improvers Voc
21、abulary 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 EN 12944-2:1999 apply. 4 Principle For
22、 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 size between 0,063 mm and 0,125 mm are de
23、termined, 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 1482-2. 6 Reagents 6.1 Sodium hexametaphosp
24、hate, solution 1 %. DIN EN 15924:2011-12 EN 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 on a stand. 7.4 250 ml beakers. 7
25、.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 the test portion (8.1) on the top si
26、eve. 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 on the top sieve seems to remain
27、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. Transfer any deposit from the coll
28、ecting 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 residue by filling the beakers wit
29、h 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 analysis should be carried out again in t
30、he 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 into the top sieve and wash the fla
31、sk thoroughly. Continue the analysis as described in 8.2. DIN EN 15924:2011-12 EN 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) according to the following
32、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; M1is the mass, in grams, of t
33、he 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 information: a) the test method
34、 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 percentage of fineness of the fertiliz
35、er; 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). DIN EN 15924:2011-12 Bibliography 1 EN 1482-1, 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
copyright@ 2008-2019 麦多课文库（www.mydoc123.com）网站版权所有
备案/许可证编号：苏ICP备17064731号-1