1、BRITISH STANDARDBS ISO 15967:2007Direct reduced iron Determination of the tumble and abrasion indices of hot briquetted iron (HBI)ICS 73.060.10g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37
2、g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS ISO 15967:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 November 2007 BSI 2007ISBN 978 0 580 55308 0National forewordThis British Standard is the UK implementation of ISO 15967:2007.The U
3、K 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 contract. Users are responsible f
4、or its correct application.Compliance with a British Standard cannot confer immunity from legal obligations. Amendments issued since publicationAmd. No. Date CommentsReference numberISO 15967:2007(E)INTERNATIONAL STANDARD ISO15967Second edition2007-09-15Direct reduced iron Determination of the tumbl
5、e and abrasion indices of hot briquetted iron (HBI) Minerais de fer prrduits Dtermination des indices de cohsion et dabrasion du fer briquet chaud BS ISO 15967:2007ii iiiContents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 1 4 Principle. 1 5 Sampli
6、ng, sample preparation and preparation of test portions. 1 6 Apparatus 2 7 Procedure 3 8 Expression of results . 3 9 Test report . 4 10 Verification 4 Annex A (normative) Flowsheet of the procedure for the acceptance of test results 6 BS ISO 15967:2007iv Foreword ISO (the International Organization
7、for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has t
8、he right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Interna
9、tional 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 Standards adopted by the technical committees are circulated to the member bodies for voting. Publicatio
10、n as an International 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 patent rights. ISO shall not be held responsible for identifying any or all such patent rights
11、. ISO 15967 was prepared by Technical Committee ISO/TC 102, Iron ore and direct reduced iron, Subcommittee SC 3, Physical testing. This second edition cancels and replaces the first edition (ISO 15967:2000), which has been revised to homogenise with other physical test standards. BS ISO 15967:2007vI
12、ntroduction The test method in this International Standard has been developed to evaluate the resistance of direct reduced iron in the form of hot briquetted iron (HBI). The results of this test should be considered in conjunction with other tests used to evaluate the quality of products of direct r
13、eduction processes. This International Standard 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. The level of degradation measured in this test has been found to be a good indication of HBI resistance duri
14、ng ship loading, transport and handling operations for bulk materials. BS ISO 15967:2007blank1Direct reduced iron Determination of the tumble and abrasion indices of hot briquetted iron (HBI) CAUTION This International Standard may involve hazardous operations and equipment. This standard does not p
15、urport to address all of the safety issues associated with its use. It is the responsibility of the user of this International Standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to its use. 1 Scope This International Standard
16、 specifies a method to provide a relative measure for evaluating the resistance of direct reduced iron to size degradation by impact and abrasion. This International Standard specifies the determination of the tumble and abrasion indices of hot briquetted iron (HBI). 2 Normative references The follo
17、wing referenced documents are indispensable for the 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. ISO 3310-1:2000, Test sieves Technical requirements and te
18、sting Part 1: Test sieves of metal wire cloth ISO 3310-2:1999, Test sieves Technical requirements and testing Part 2: Test sieves of perforated metal plate ISO 10835: 2007, Direct reduced iron and hot briquetted iron Sampling and sample preparation ISO 11323:2002, Iron ore and direct reduced iron Vo
19、cabulary 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 11323 apply. 4 Principle The test portion is tumbled in a circular drum for a total of 200 revolutions, at 25 r/min. The product material is sieved with test sieves having square openings of 6,
20、30 mm and 500 m. The tumble index is expressed as the mass percentage of material greater than 6,30 mm, and the abrasion index as the mass percentage of material less than 500 m. 5 Sampling, sample preparation and preparation of test portions 5.1 Sampling and sample preparation Sampling of a lot of
21、HBI and sample preparation shall be in accordance with ISO 10835. BS ISO 15967:20072 A test sample of at least 70 kg, on a dry basis, shall be obtained. Oven-dry the test sample to constant mass at 105 C 5 C and cool it to room temperature before preparation of the test portions. NOTE Constant mass
22、is achieved when the difference in mass between two subsequent measurements becomes less than 0,05 % of the initial mass of the test sample. Sieve the test sample by hand on a 40 mm test sieve to discard any 40 mm material. 5.2 Preparation of test portions Spread the test sample on a smooth and flat
23、 plate to form a single layer of briquettes, in the shape of a rectangle. At least 4 test portions, each of approximately 15 kg, shall be prepared by taking, at random, single briquettes and placing them consecutively in 4 piles or containers. Weigh the test portions and determine whether they meet
24、the mass tolerance of 15 kg 0,5 kg. Single briquette increments shall be added to the test portions from the remaining test sample or removed from the test portions and discarded to make up a weight of 15 kg 0,5 kg. Register the mass of each test portion on its recipient label. 6 Apparatus 6.1 Gener
25、al The test apparatus shall comprise: a) ordinary laboratory equipment, such as an oven, hand tools and safety equipment; b) tumble drum and rotation equipment; c) test sieves; d) a weighing device. Figure 1 shows an example of the test apparatus. 6.2 Tumble drum, made of steel plate at least 5 mm i
26、n thickness, having an internal diameter of 1 000 mm and an internal length of 500 mm. Two equally spaced L-shaped steel lifters 50 mm flat 50 mm high 5 mm thick and 500 mm long shall be solidly attached longitudinally inside the drum by welding, in such a manner as to prevent accumulation of materi
27、al between the lifter and drum. The door shall be so constructed as to fit into the drum to form a smooth inner surface. During the test, the door shall be rigidly fastened and sealed to prevent loss of the sample. The drum shall be rotated on stub axles attached to its ends by flanges welded so as
28、to provide smooth inner surfaces. The drum shall be replaced when thickness of the plate is reduced to less than 3 mm in any area. The lifters shall be replaced when the height is reduced to less than 47 mm. 6.3 Drum-rotation equipment, capable of operating on a minimum 1,5 kW power supply to ensure
29、 that the drum attains full speed in one revolution, rotates at a constant speed of 25 r/min 1 r/min and stops within one revolution. The equipment shall be fitted with a revolution counter and with an automatic device for stopping the drum after a predetermined number of revolutions. 6.4 Test sieve
30、s, conforming to ISO 3310-1 or ISO 3310-2 and having square mesh apertures of the following nominal sizes: 40,0 mm; 6,30 mm; 500 m. 6.5 Weighing device, capable of weighing the test sample and test portions to an accuracy of 1 g. BS ISO 15967:200737 Procedure 7.1 Number of determinations for the tes
31、t Carry out the test as many times as required by the procedure in Annex A. 7.2 Tumbling Take, at random, one of the test portions prepared in 5.2, record its mass (m0) and place it in the tumble drum (6.2). Tightly fasten the door and rotate the drum at 25 r/min 1 r/min for a total of 200 revolutio
32、ns. Stop the drum and keep the door fastened for at least 2 min before opening, to allow the dust to settle. DANGER Tumbling of HBI can be noisy and care must be taken to protect the hearing of the operator. It is recommended that putty or modelling clay be used to seal the door, to prevent the loss
33、 of fines from the drum. 7.3 Sieving Remove all the material carefully from the drum and hand sieve it on the 6,30 mm and 500 m sieves (6.4). Determine and record the mass of each fraction retained on 6,30 mm (m1) and 500 m (m2) sieves to the nearest 1 g. Material lost during sieving shall be consid
34、ered to be part of the 500 m fraction. The difference between the initial mass of the test portion and the total mass of the fractions shall not exceed 1,0 %. If this difference exceeds 1,0 %, the test shall be rejected. NOTE Equivalent mechanical sieving may be used, provided that preliminary test
35、results give similar results to hand sieving within the permissible tolerance of 2 % absolute. Care should be taken to ensure that the sieves are not overloaded. An efficient way of achieving this is by including a sieve of aperture size between 6,3 mm and 500 m (e.g. 2,0 mm or 1,0 mm) and another o
36、f aperture size larger than 6,3 mm (e.g. 10,0 mm or 8,0 mm). This will improve sieving efficiency by decreasing the sample mass retained on the 500 m and the 6,3 mm sieves. 8 Expression of results 8.1 Calculation of the tumble index (T) and abrasion index (A) The tumble index, T, and the abrasion in
37、dex, A, expressed as percentages by mass, are calculated from the following formula: 10T 100mm= ()0120A 100mmmm+= where: m0is the mass, in grams, of the test portion as weighed out and placed in the tumble drum; m1is the mass, in grams, of the + 6,30 mm fraction of the tumbled test portion; m2is the
38、 mass, in grams, of the 6,30 + 500 m fraction of the tumbled test portion. Record each result to 2 decimal places. BS ISO 15967:20074 8.2 Repeatability and acceptance of test results Follow the procedure in Annex A, for each of the indices, by using the repeatability given in Table 1. The results sh
39、all be reported to one decimal place. Table 1 Repeatability (r) Tumble strength r %, absolute Tumble index T (+ 6,30 mm) 0,2 Abrasion index A ( 500 m) 0,12 9 Test report The test report shall include the following information: a) a reference to this International Standard, e.g. ISO 15967:2007; b) al
40、l details necessary for the identification of the sample; c) the name and address of the test laboratory; d) the date 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 Intern
41、ational Standard or regarded as optional, as well as any incident which may have had an influence on the results; h) the tumble index, T, and the abrasion index, A; i) the type of sieve used; j) the sieving conditions, e.g. the method of sieving and the sieving time. 10 Verification Regular checking
42、 of the apparatus is essential to ensure test-result reliability. The frequency of checking is a matter for each laboratory to determine. The conditions of the following items shall be checked: sieves; weighing device; tumble drum; drum-rotation equipment. BS ISO 15967:20075It is recommended that in
43、ternal reference material be prepared and used periodically to check test repeatability. Appropriate records of verification activities shall be maintained. Dimensions in millimetres a) Side view b) Front view Key 1 revolution counter 2 door with handle 3 stub axle (no through-shaft) 4 two lifters (
44、50 50 5) 5 direction of rotation 6 plate ID internal diameter Figure 1 Example of test apparatus (schematic diagram) BS ISO 15967:20076 Annex A (normative) Flowsheet of the procedure for the acceptance of test results r: see Table 1 BS ISO 15967:2007blankBS ISO 15967:2007BSI389 Chiswick High RoadLon
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