1、BRITISH STANDARDBS ISO 3852:2007Iron ores for blast furnace and direct reduction feedstocks Determination of bulk densityICS 73.060.10g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g
2、50g51g60g53g44g42g43g55g3g47g36g58BS ISO 3852:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2008 BSI 2008ISBN 978 0 580 55302 8National forewordThis British Standard is the UK implementation of ISO 3852:2007. It supersedes BS 6
3、147:1989 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee ISE/58, Iron ores.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
4、 contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments/corrigenda issued since publicationDate CommentsINTERNATIONALSTANDARDISO3852Third edition2007-09-01Reference numberISO 3852:2007(E)Iron ores for bl
5、ast furnace and direct reduction feedstocks Determination of bulk densityMinerais de fer pour charges de hauts fourneaux et pour procds par rduction directe Dtermination de la masse volumique apparenteBS ISO 3852:2007ii iiiContents Page1 Scope 12 Normative references 13 Terms and definitions 14 Prin
6、ciple 15 Sampling, sample preparation and preparation of test portions 26 Apparatus . 27 Procedure . 38 Expression of results 39 Test report 410 Verification . 4Annex A (normative) Flowsheet of the procedure for the acceptance of test results . 6BS ISO 3852:2007ivForewordISO (the International Organ
7、ization for Standardization) is a worldwide federation of national standards bodies(ISO member bodies). The work of preparing International Standards is normally carried out through ISOtechnical committees. Each member body interested in a subject for which a technical committee has beenestablished
8、has the right to be represented on that committee. International organizations, governmental andnon-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the InternationalElectrotechnical Commission (IEC) on all matters of electrotechnical standardization.Inter
9、national Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.The main task of technical committees is to prepare International Standards. Draft International Standardsadopted by the technical committees are circulated to the member bodies for voting. Publicatio
10、n as anInternational Standard requires approval by at least 75 % of the member bodies casting a vote.Attention is drawn to the possibility that some of the elements of this document may be the subject of patentrights. ISO shall not be held responsible for identifying any or all such patent rights.IS
11、O 3852 was prepared by Technical Committee ISO/TC 102, Iron ore and direct reduced iron, SubcommitteeSC 3, Physical testing.This third edition cancels and replaces the second edition (ISO 3852:1988), which has been revised tohomogenise with other physical test standards.BS ISO 3852:2007vIntroduction
12、This is one of a number of physical test methods that have been developed to measure various physicalparameters and to evaluate the behaviour of iron ores including reducibility, disintegration, crushing strength,apparent density, etc. This method was developed to provide a uniform procedure, valida
13、ted by collaborativetesting, to facilitate comparisons of tests made in different laboratories.The results of this test should be considered in conjunction with other tests used to evaluate the quality of ironores as feedstocks for blast furnace and direct reduction processes.This International Stan
14、dard may be used to provide test results as part of a production quality-control system,as a basis of a contract, or as part of a research project.BS ISO 3852:2007blank1Iron ores for blast furnace and direct reduction feedstocks Determination of bulk densityCAUTION This International Standard may in
15、volve hazardous operations and equipment. ThisInternational Standard does not purport to address all of the safety issues associated with its use. It isthe responsibility of the user of this International Standard to establish appropriate safety and healthpractices and to determine the applicability
16、 of regulatory limitations prior to its use.1ScopeThis International Standard specifies two methods of determining the bulk density of iron ores.Method 1 is applicable to natural iron ore and processed iron ore having a nominal top size of .Method 2 is applicable to any natural iron ores and process
17、ed ores, regardless of size.NOTE The measured density does not necessarily represent the bulk density of compacted or stockpiled iron ores.2 Normative referencesThe following referenced documents are indispensable for the application of this document. For datedreferences, only the edition cited appl
18、ies. For undated references, the latest edition of the referenced document(including any amendments) applies.ISO 3082:2000, Iron ores Sampling and sample preparation procedures1)ISO 3087:1998, Iron ores Determination of moisture content of a lotISO 4701:2), Iron ores and direct reduced iron Determin
19、ation of size distribution by sievingISO 11323:2002, Iron ore and direct reduced iron Vocabulary3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 11323 apply.4 PrincipleA test portion is introduced into a container of known volume until its surface is l
20、evel. The bulk density iscalculated as the ratio of the mass of the sample to the internal volume of the container.1) Under revision to incorporate ISO 10836, Iron ores Method of sampling and sample preparation for physical testing.2) To be published. (Revision of ISO 4701:1999)40 mmBS ISO 3852:2007
21、25 Sampling, sample preparation and preparation of test portions5.1 Sampling and sample preparationIn the case of method 1, sampling of a lot and preparation of a test sample shall be in accordance withISO 3082. A test sample of at least of natural and processed iron ore shall be obtained.The test s
22、ample may be carried out using an as-received, air-dried or oven-dried sample. If the test is made onan oven-dried basis, dry the sample to constant mass at and cool it to room temperature beforepreparation of the test portions.NOTE 1 Constant mass is achieved when the difference in mass between two
23、 subsequent measurements becomes lessthan of the initial mass of the test sample.In the case of method 2, the test sample shall have a minimum mass of 35 tonnes, the recommended massbeing 50 tonnes.NOTE 2 A test sample of mass 35 tonnes has a volume of approximately to , according to the material.5.
24、2 Preparation of test portionsIn the case of method 1, the test portions shall be obtained from the test sample using the division methodsgiven in ISO 3082.At least 4 test portions, each of , shall be prepared from the test sample.In the case of method 2, the test sample itself is used as a test por
25、tion.6 Apparatus6.1 GeneralThe test apparatus shall comprisea) ordinary laboratory equipment, such as an oven, hand tools and safety equipment,b) small container,c) large container, andd) a weighing device.6.2 Method 16.2.1 Small container, made of metal, cylindrical in form, and having an internal
26、diameter of and an internal height of (inner volume: approximately ). The container wall andbottom shall have sufficient thickness to ensure their rigidity during the test. The container shall be reinforced bya steel band around the outside periphery at the top, and shall have two handles, apart, at
27、tached to theouter surface by welding. A carriage or other suitable device may be provided to facilitate its transportationwithin the laboratory. The volume of the container shall be determined with a precision of using potablewater of known density.6.2.2 Weighing device, capable of weighing the tes
28、t sample and test portions and having a sensitivity ofor better.600 kg105C 5C0,05 %14 m323,6 m3150 kg 0,15 kg400 mm 2mm400 mm 2mm 0,05 m31800,1 L1/1 000BS ISO 3852:200736.3 Method 26.3.1 Large container, such as a truck or railway wagon, of regular geometrical shape, with smooth innersurfaces of the
29、 walls and bottom, and in good general condition. The container shall have sufficient capacity tohold, when filled, a minimum of of test sample and a minimum height of the test sample bed of . Theminimum length, width and height shall be 10 times the maximum particle size of the test portion.6.3.2 W
30、eighing device, preferably of platform type, capable of weighing the mass to be determined to asensitivity of .7 Procedure7.1 Number of determinations for the testCarry out the test as many times as required by Annex A. Simultaneously with the test, the moisture content andthe size distribution shou
31、ld be determined in accordance with the procedures specified in ISO 3087 andISO 4701, respectively.7.2 Density determination7.2.1 Method 1 Small containerWeigh the dried container (6.2.1) and record the mass ( ) to the nearest .Fill the container with the sample of as-received, air-dried or oven-dri
32、ed material, using a proper shovel. Emptythe shovel from a height not exceeding above the surface of the material in the container. Fill thecontainer carefully, in order to prevent evident segregation.After filling the container to overflowing, draw a straight-edge across the top of the container to
33、 make theheaped surface level.Transfer the filled container to the weighing device (6.2.2) without loss of sample from the container. Weigh thefilled container and record the mass ( ) to the nearest .7.2.2 Method 2 Large containersMeasure the length, width and height of the container (6.3.1) with a
34、precision of and then calculate andrecord its volume ( ). Weigh the empty container and record the mass ( ).With the container on a level surface, discharge the sample into it manually or by mechanical means, takingcare to avoid breakage or segregation of particles. Level off the upper surface acros
35、s the top of the container,verifying by visual inspection and removing or pushing down any particles which would appear to obstruct thepassage of a straight-edge if it were pulled across the top of the container.Weigh the filled container and record the mass ( ).8 Expression of results8.1 Calculatio
36、n of the bulk density ( )The bulk density, , expressed in , is calculated from the following formula:10 t 500 mm1/200m00,2 kg50 mmm10,2 kg0,5 %V m0m1apapkg/m3ap=m1m0VBS ISO 3852:20074whereis the mass, in kilograms, of the empty container;is the mass, in kilograms, of the container plus sample;is the
37、 volume, in cubic metres, of the container.Record the result rounded off to 4 significant figures.The SI unit for density is . However, the use of units outside the SI, which are accepted by the ComitInternational des Poids et Mesures (CIPM), will be practical under certain circumstances. If the uni
38、t isused, the result of the test should be expressed to 2 decimal places.8.2 Repeatability and acceptance of test resultsFollow the procedure in Annex A by using the repeatability value given in Table 1. The results shall be reportedto 1 decimal place.9 Test reportThe test report shall include the f
39、ollowing information:a) a reference to this International Standard, i.e. ISO 3852:2007;b) all details necessary for the identification of the sample, including a statement of the condition of thesample; i.e. as-received, air-dried or oven-dried;c) the name and address of the test laboratory;d) the d
40、ate of the test;e) the date of the test report;f) the signature of the person responsible for the test;g) details of any operation and any test conditions not specified in this International Standard or regarded asoptional, as well as any incident which may have had an influence on the results;h) th
41、e bulk density, , together with the qualification “as-received”, “air-dried”, or “oven-dried”;i) any quality characteristics of the sample which may have had an influence on the result, i.e.: moisturecontent; size distribution; total iron content, if available: geological type.10 VerificationRegular
42、 checking of apparatus is essential to assure test-result reliability. The frequency of checking is a matterfor each laboratory to determine.Table 1 Repeatability ( )Method ( )1210is the mean of the replicated determinations.m0m1Vkg/m3tonne/m31 000 kg/m3= 1 tonne/m3= 1 kg/Lrr kg/m30,05 apapapBS ISO
43、3852:20075The conditions of the following items shall be checked: weighing device; container.It is recommended that internal reference material be prepared and used periodically to check test repeatability.Appropriate records of verification activities shall be maintained.BS ISO 3852:20076Annex A(no
44、rmative)Flowsheet of the procedure for the acceptance of test results: see Table 1.rBS ISO 3852:2007blankBS ISO 3852:2007BSI389 Chiswick High RoadLondonW4 4ALBSI British Standards InstitutionBSI is the independent national body responsible for preparing British Standards. It presents the UK view on
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