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本文(EN 1236-1995 en Fertilizers - Determination of Bulk Density (Loose)《肥料 容积(松)密度的测定(ISO 3944 1992修正)》.pdf)为本站会员(周芸)主动上传,麦多课文库仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。 若此文所含内容侵犯了您的版权或隐私,请立即通知麦多课文库(发送邮件至master@mydoc123.com或直接QQ联系客服),我们立即给予删除!

EN 1236-1995 en Fertilizers - Determination of Bulk Density (Loose)《肥料 容积(松)密度的测定(ISO 3944 1992修正)》.pdf

1、CEH EN*l23b 95 3404589 OLL5325 5T5 = BRITISH STANDARD Fertilizers - Determination of bulk density (loose) The European Standard EN 1236 : 1995 has the status of a British Standard ICs 65.080 BS EN 1236 : 1995 - CEN EN*L23b 95 3404589 OLL5326 431 BS EN 1236 : 1995 Committees responsible for this Brit

2、ish Standard The preparation of this British Standard was entrusted to Technical Committee CIv37, Fertilizers and related chemicals, upon which the following bodies were represented: Association of Public Analysts British Aggregate Construction Materials Industries British Coal Corporation Chemical

3、Industries Association Consumers Association Department of ?iade and Industry (Laboratory of the Government Chemist) Fertiliser Manufacturers Association Ltd. Horticulm Trades Association Institute of Ti.ading Standards Administrati on Ministry of Agriculture, Fisheries and Food Water Services Assoc

4、iation of England and Wales 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 December 1995 O BSI 1995 Amendments issued since publication Amd.No* ID -

5、the bulk density (i-) is expressed in grams per cubic centimeire cg/cm3) in IS0 3944, in this European Standard it is expressed in kilograms per cubic metre wm3); - the normative references to intedonai standads Is0 7742 : 1988 and Is0 8358 : 1991 concerning methos of sampiing and sample preparation

6、 have been deleted and the method used has to be indicated in the test repoG - an informative annex ZA Bibliography has been added. The common modicaons have been inserted in the text of the reference document and are indicated by a vertid line in the margin. Introduction The bulk densities (loose a

7、nd tapped) of a fertilizer provide information relative to the required size of packaging materials, storehouses, stock-rooms, etc. Generally, the bulk density (tapped) is up to 10 % greater than the bulk density (ioose), and sometimes it may exceed this value. Both bulk densities depend on the actu

8、al density, surface form and particle size of the fertilizers. The bulk density (loose) can be used to calculate the maximum volume of a given weight of fertilizer which may be expected in practice. The actual volume occupied by a given weight of fertilizer will normally be withjn the range calculat

9、ed hm the bulk density (loose) and the bulk density (tapped). CEN EN*L23b 95 m 3404589 OLL5331 8T m Page 3 EN 1236:1995 Fertilizers - Determination of bulk density (loose) 1 Scope This International Standard specifies a method for the determination of the bulk density (loose) of solid fertilizers ex

10、cept powder fertilizers. The method is applicable to free-flowing fertilizers. The method is not suitable for materials which contain more than 20 % by mass of particles exceeding 5 mm in diameter. Annex ZA lists the bibliography. 2 Definition For the purposes of this International Standard, the rol

11、lowing definition applies. 2.1 bulk density (loose) of a fertilizer The mass per volume of a material tipped into a container and under clearly specified conditions. The bulk density loose IS expressed in kilograms per cubic metre (kgim s ). I 3 Principle Pouring of the fertilizer from a specified f

12、unnel into a specified measuring cylinder of known volume and weighing of the contents of the cylinder. 4 Apparatus 4.1 Balance, capable of weighing to the nearest 1 g. 4.2 Apparatus for determination of bulk density (loose), having the approximate dimensions given in figure 1 and consisting of the

13、following. 4.2.1 Removable measuring cylinder, without a spout. The capacity u to the brim shall be known to the nearest cubic centimetre. CAUTION - It is important that those parts of the apparatus which are in contact with the fertilizer are made of corrosion-resistant material (glass, plastics, e

14、tc.). 4.2.2 Firmly mounted funnel. 4.3 Spatula, approximately 120 mm x 20 mm, or other suitable scraper. 5 Preparation of test sample Prepare the test sample by appropriate methods, ensuring that the sample is sufficient to carry out two separate determinations. 6 Procedure Pour into the closed funn

15、el (4.2.2) a quantity of the fertilizer greater than that needed to fill the measuring cylinder (4.2.1). Fully open the slide of the funnel so that the contents discharge into the measuring cylinder in 6 s to 12 s. CEN ENa123b 95 3404589 OLL5332 735 = Page 4 EN 1236 : 1995 If the fertilizer does not

16、 flow freely, keep the outlet clear by inserting a rod of 3 mm to 4 mm diameter into the opening. When the cylinder overflows, close the slide of the funnel and scrape away the surplus fertilizer using the spatula or other suitable tool (4.3). Avoid vibration of the filled measuring cylinder. Remove

17、 the measuring cylinder from below the fun- nel and weigh its contents to the nearest 1 g of the total mass. Carry out two determinations, in rapid succession, on separate test portions taken from the same test sample. 7 Expression of results 7.1 Method of calculation The bulk density (loose), p, of

18、 the fertilizer, in I kilograms per cubic metre, is given by the equation m p=- V where m I is the mass, in kilograms, of the test portion; Take as the result the arithmetic mean of the two determinations provided that lhe requirement for repeatability (see 7.2) is satisfied. 7.2 Repeatability The d

19、ifference between the results of two determi- nations, carried out in rapid succession by the same operator using the same apparatus, shall not exceed 1 O kg/m3. I 8 Testreport The test report shall include the following particu- lars: a) identification of the sample; b) reference to the method used

20、: c) the result and the method of expression; d) any unusual features noted during the determi- na tion; e) any operation not included in this International Standard or regarded as optional; 9 method of sampling and sample preparation. I Y is the volume up to the brim, in cubic metres, of the measur

21、ing cylinder. I CEFI EN*L23b 75 3404587 OLL5333 b7L Page 5 EN 1236 : 1995 Dimensions (approximate) in millimetres I- 0 300 I I O 420 I Figure 1 - Apparatus for the determination of bulk density (loose) of fertilizers CEN ENs1236 95 3404589 OLL5334 508 = Page 6 EN 1236 : 1996 Annex ZA (informative) B

22、ibliography Iso3963: 1977 Iso 7410 : 1983 Iso7742: 1988 Iso8538: 1991 EN 1237 Pr EN 1482 Fertilkm - SamplingJm a convqor by stopping the belt Fertilkm and soil conditioners - Fd samples - Practical arrangements Solid fertilizers - Reduction of samples Solid fertizm - Preparation of samples for chern

23、ical and physical analysis Fertkm -Determination of W density (tapped) Sampling of solid fertizm - CEN ENr323b 95 W 3404589 0335335 Y44 BS EN 1236 : 1995 BSI 389 Chiswick High Road London w4 4AL 9512-U.35k- -FP BSI - British Standards Institution BSI is the independent national body responsible for

24、preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Contract requirements A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible

25、 for their correct application. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions. Any person who hds an inaccuracy or ambiguity while using this British Standard should bring it to the at

26、tention of the Quality Manager, BSI without delay so that the matter may be investigated swiftly. BSI offers members an individual updating service called PLUS which ensures that subscriberc automatically receive the latest editions of standards. Buying standards Orders for all BSI, international an

27、d foreign standards publications should be addressed to Customer Services, Sales Department at Chiswick Tel: 0181 996 7000, Fax: 0181 996 7001. In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as British Standards,

28、 unless otherwise requested. Information on standards BSI provides a wide range of information on national, European and international standards through its Library, the Standardline Database, the BSI Information Technology Service (BlTS) and its Technical Help to Exporters Service. Contact the Info

29、rmation Department at Chiswick Tel 0181 996 7111; Fax: 0181 996 7048. Subscribing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards. For details of these and other benefits contact Customer Services, Membership at Chis

30、wick Tel: 0181 996 7002; Fax: 0181 996 7001. Copyright Copyright subists in ali BSI publications and no part may be reproduced in any form without the prior permission in writing of BSI. This does not preclude the free use, in the course of implementing the standard of necessary details such as symb

31、ols and size, type or grade designations including use by incorporation into computer programs, but where these details are reproduced including without limitation in printed form, in computer programs or in any other form whatsoever, the pennission in writing of BSI must be obtained and if granted will be on terms including royalty, before the product is sold, licensed or otherwise exploited for commercial gain. Enquiries about copyright should be made to the Copyright Manager at Chiswick. ISBN O 580 24906 O Product code 00617436 cw37

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