1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationDD CEN/TS 16305:2012Liming materials Determination of the dustcontent of granular limingmaterials before and aftersimulated handling conditionsDD CEN/TS 16305:2012 DRAFT FOR DEVE
2、LOPMENTNational forewordThis Draft for Development is the UK implementation of CEN/TS 16305:2012.This publication is not to be regarded as a British Standard.It is being issued in the Draft for Development series of publications and is of a provisional nature. It should be applied on this provisiona
3、l basis, so that information and experience of its practical application can be obtained.Comments arising from the use of this Draft for Development are requested so that UK experience can be reported to the international organization responsible for its conversion to an international standard. A re
4、view of this publication will be initiated not later than 3 years after its publication by the international organization so that a decision can be taken on its status. Notification of the start of the review period will be made in an announcement in the appropriate issue of Update Standards.Accordi
5、ng to the replies received by the end of the review period, the responsible BSI Committee will decide whether to support the conversion into an international Standard, to extend the life of the T e c h n i c a l S p e c i f i c a t i o n o r t o w i t h d r a w i t . C o m m e n t s s h o u l d b e
6、s e n t t o the Secretary of the responsible BSI Technical Committee at British Standards House, 389 Chiswick High Road, London W4 4AL.The UK participation in its preparation was entrusted to T e c h n i c a l C o m m i t t e e C I I / 3 7 , F e r t i l i s e r s a n d r e l a t e d c h e m i c a l
7、s .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. Users are responsible for its correct application. The British Standards Institution 2012Published by BSI Stan
8、dards Limited 2012.ISBN 978 0 580 72724 5ICS 65.080Compliance with a British Standard cannot confer immunity from legal obligations.This Draft for Development was published under the authority of the Standards Policy and Strategy Committee on 29 February 2012.Amendments issued since publicationDate
9、T e x t a f f e c t e dDD CEN/TS 16305:2012TECHNICAL SPECIFICATION SPCIFICATION TECHNIQUE TECHNISCHE SPEZIFIKATION CEN/TS 16305 January 2012 ICS 65.080 English Version Liming materials - Determination of the dust content of granular liming materials before and after simulated handling conditionsAmen
10、dements minraux basiques - Dtermination de la teneur en fines des amendements minraux basiques granuls avant et aprs simulation des conditions de manipulation Calcium-/Magnesium-Bodenverbesserungsmittel - Bestimmung des Staubanteils von granulatfrmigen Calcium-/Magnesium-Bodenverbesserungsmitteln vo
11、r und nach simulierten Behandlungsbedingungen This Technical Specification (CEN/TS) was approved by CEN on 31 October 2011 for provisional application. The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to submit their comm
12、ents, particularly on the question whether the CEN/TS can be converted into a European Standard. CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS available promptly at national level in an appropriate form. It is permissible to kee
13、p conflicting national standards in force (in parallel to the CEN/TS) until the final decision about the possible conversion of the CEN/TS into an EN is reached. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, F
14、rance, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, 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
15、 KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. CEN/TS 16305:2012: EDD CEN/TS 16305:2012CEN/TS 16305:2012 (E) 2 Contents Page Foreword 3Introduction .41 Sco
16、pe 52 Normative references 53 Terms and definitions .54 Principle 55 Apparatus .56 Sampling .77 Procedure .78 Expression of results 89 Test report . 10Bibliography . 11DD CEN/TS 16305:2012CEN/TS 16305:2012 (E) 3 Foreword This document (CEN/TS 16305:2012) has been prepared by Technical Committee CEN/
17、TC 260 “Fertilizers and liming materials”, the secretariat of which is held by DIN. 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. Ac
18、cording to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to announce this Technical Specification: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Irel
19、and, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DD CEN/TS 16305:2012CEN/TS 16305:2012 (E) 4 Introduction A standard method for the determination of the dust content of gra
20、nulated liming materials is required to indicate the stability and quality of the product and to simulate the dust produced during handling and storage. A rotating device is used to simulate the abrasion caused by handling. DD CEN/TS 16305:2012CEN/TS 16305:2012 (E) 5 1 Scope This European Standard s
21、pecifies a method for the determination of the amount of dust in granulated liming materials, both before and after simulated handling conditions. This method applies to all granulated and screened liming materials. 2 Normative references The following referenced documents are indispensable for the
22、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. EN 1235, Solid fertilizers Test sieving (ISO 8397:1988, modified) EN 1482-2, Fertilizers and liming materials
23、Sampling and sample preparation Part 2: Sample preparation EN 12944-3:2001, Fertilizers and liming materials Vocabulary Part 3: Terms relating to liming materials ISO 565, Test sieves Metal wire cloth, perforated metal plate and electroformed sheet Nominal sizes of openings ISO 3310-1, Test sieves T
24、echnical requirements and testing Part 1: Test sieves of metal wire cloth 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 12944-3:2001 apply. NOTE For further definitions see EN 12944-1 and EN 12944-2. 4 Principle Dry sieving of a granulated liming ma
25、terial using a mechanical sieve. Abrasion using a Mechanical Rotating Device (MRD). Dry sieving of the product from the MRD using a mechanical sieve. Determination of the content of dust (i. e. material below 1 mm) before and after abrasion. 5 Apparatus 5.1 Mechanical Rotating Device (MRD), accordin
26、g to Figure 1, with the following specific characteristics: cylinder internal diameter 250 mm, external diameter 340 mm, internal thickness 120 mm, external thickness 130 mm; three internal paddles: 75 mm length set at 0 , 20 mm length set at 240 (clockwise), 20 mm length set at 300 (clockwise); cyl
27、inder speed rotation, 19 min-1. DD CEN/TS 16305:2012CEN/TS 16305:2012 (E) 6 Dimensions in millimetres Figure 1 Mechanical rotating device DD CEN/TS 16305:2012CEN/TS 16305:2012 (E) 7 The machine shall be capable of counting the number of revolutions. It shall be capable of stopping after a pre-determ
28、ined number of revolutions. 5.2 Balance, capable of weighing to the nearest 0,01 g. 5.3 Sieving machine, capable of horizontal and vertical motion on a single or a nest of sieves. 5.4 Sieve, 1 mm metal wire cloth sieve according to ISO 565 and ISO 3310-1. NOTE Additional sieve sizes may be used when
29、 determining a range of size fractions within a sample. 6 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. Use 2 kg of material to determine both part 1 a
30、nd part 2. Use 1 kg if either part 1 or part 2 is to be determined separately. NOTE Handling soft materials during sample preparation can influence the dust content of the sample. Care should be taken when handling and preparing the samples. 7 Procedure 7.1 Determination of the amount of material in
31、itially passing 1 mm 7.1.1 Weigh 300 g 1 g to the nearest 0,01 g of the sampled material. 7.1.2 Place on the 1 mm sieve and mechanically sieve for 1 min at frequency 50 Hz to 100 Hz. 7.1.3 Weigh the residue remaining on the 1 mm sieve to the nearest 0,01 g and record the mass of material passing 1 m
32、m. Retain the material remaining on the sieve and store for further testing (see 7.2.3). 7.1.4 Repeat the operation three times. Calculate and record the mean of the results. 7.2 Determination of the amount of material passing 1 mm after simulated handling conditions 7.2.1 General NOTE Sometimes, th
33、e initial content of dust of the sample received is not representative of the product itself because of its possible alteration during transport. If the received product initially contains a significant amount of dust, removing existing dust before abrasion may alter the results, because lower amoun
34、ts will fall down in the cylinder. It is the reason why the method includes two parts for measurement: with or without initial dust, but always with the same amount in the MRD. If initial content of dust is considered as representative of the product, part 1 is to be preferred. If initial content of
35、 dust in the sample is suspicious, part 2 would be preferred, but the final result (A4), may always be considered as the specific production of dust due to this conventional handling. DD CEN/TS 16305:2012CEN/TS 16305:2012 (E) 8 7.2.2 Part 1: Handling with initial dust 7.2.2.1 Weigh 250 g 1 g to the
36、nearest 0,01 g of the original sample, including initial dust. 7.2.2.2 Place in the MRD cylinder and rotate for exactly 450 revolutions. 7.2.2.3 Recover all the material from the MRD. 7.2.2.4 Place on a 1 mm sieve according to EN 1235 and mechanically sieve for 1 min at frequency 50 Hz to 100 Hz. 7.
37、2.2.5 Weigh to the nearest 0,01 g and record the mass of the material remaining on the 1 mm sieve. 7.2.2.6 Repeat the part 1 operation three times. Calculate and record the mean of the results. 7.2.3 Part 2: Handling without initial dust 7.2.3.1 Weigh 250 g 1 g to the nearest 0,01 g of the material
38、retained on the 1 mm sieve during operation defined in 7.1. 7.2.3.2 Place in the MRD cylinder and rotate for exactly 450 revolutions. 7.2.3.3 Recover all the material from the MRD. 7.2.3.4 Place on a 1 mm sieve according to EN 1235 and mechanically sieve for 1 min at frequency 50 Hz to 100 Hz. 7.2.3
39、.5 Weigh to the nearest 0,01 g and record the mass of the material remaining on the 1 mm sieve. 7.2.3.6 Repeat the part two operations three times. Calculate and record the mean of the results. 8 Expression of results 8.1 Determination of the amount of dust (material below 1 mm) in the original samp
40、le Calculate the amount of dust (material below 1 mm) in the original sample as received, A1, according to Equation (1): 1211100mmmA=)(1) where A1is the amount of dust contained in the original test portion expressed as a mass fraction in percent; m1is the mass of the test portion in grams used in 7
41、.1; m2is the mass of the material in grams retained on the 1 mm sieve (7.1.3). DD CEN/TS 16305:2012CEN/TS 16305:2012 (E) 9 8.2 Determination of the amount of dust (material below 1 mm) after the simulated handling in the MRD of the original sample Calculate the amount of dust (material below 1 mm) a
42、fter simulated handling in the MRD, A2, according to Equation (2): 3432100)(mmmA=(2) where A2is the amount of dust contained in the original test portion after simulated handling in the MRD, expressed as a mass fraction in percent; m3is the mass of the test portion in grams used in 7.2.2.1; m4is the
43、 mass of the material in grams retained on the 1 mm sieve (7.2.2.5). 8.3 Determination of the amount of dust (material below 1 mm) after simulated handling in the MRD of material retained on the 1 mm sieve during operation 7.1.3 Calculate the amount of dust (material below 1 mm) after simulated hand
44、ling in the MRD of material retained on the 1 mm sieve during operation 7.1.3, A3, according to Equation (3): 5653100)(mmmA= (3) where A3is the amount of dust contained in that portion of the original sample which was retained on the 1 mm sieve and subsequently subjected to simulated handling in the
45、 MRD, expressed as a mass fraction in percent; m5is the mass of the test portion in grams used in 7.2.3.1; m6 is the mass of the material in grams retained on the 1 mm sieve (7.2.3.5). 8.4 Determination of the amount of dust (material below 1 mm) due to the simulated handling If part 1 (with initial
46、 dust) has been processed, calculate the amount of dust (material below 1 mm) due to the simulated handling, A4, according to Equation (4): 124AAA = (4) If part 2 (without initial dust) has been processed, calculate the amount of dust (material below 1 mm) due to the simulated handling, A4, accordin
47、g to Equation (5): 34AA = (5) where A4is the amount of dust due to simulated handling, expressed as a mass fraction in percent; DD CEN/TS 16305:2012CEN/TS 16305:2012 (E) 10 A3is the amount of dust contained in that portion of the original sample which was retained on the 1 mm sieve and subsequently
48、subjected to simulated handling in the MRD, expressed as a mass fraction in percent. 9 Test report The test report shall contain at least the following information: a) all data necessary for the identification of the sample; b) a reference to this document; c) the part(s) processed, the results and
49、the units in which the results have been expressed; d) any particular points observed in the course of the test, particularly if initial sieving shows a significant amount of dust; e) any operations not specified in the method or regarded as optional which might have affected the results. DD CEN/TS 16305:2012CEN/TS 16305:2012 (E) 11 Bibliography EN 1482-1, Fertilizers and liming materials Sampling and sample preparation Part 1: Sampling EN 12944-1, Fertilizers and liming mat
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